Delta Cooling Towers, Inc. - MENA ITS

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Delta Cooling Towers, Inc. - MENA ITS

DELTA

Cooling Towers, Inc.

Delta Cooling Towers

Leader in Non-Corrosive Cooling Tower Technology


Effective 10/2006

INTRODUCTION

History of Delta Cooling Towers

General Cooling Tower Brochure

Why Delta Cooling Towers are the Industries Best

TECHNICAL DATA

Principles of Cooling Towers Definitions & Terms

Summer Design Wet Bulb Temperatures

Average Properties of the Materials of Construction

Sizing & Application Data Sheet

PIONEER® FORCED DRAFT COOLING TOWERS

Article: Cooling Tower Stands the Test of Time and Elements

Pioneer® Tower Specifications

Engineering Drawings

Pioneer® Optional Accessories

Pioneer® Installation, Operation & Maintenance Manual

PARAGON® INDUCED DRAFT COOLING TOWERS

Paragon® Tower Specifications

Engineering Drawings

Paragon® Optional Accessories

Paragon® Installation, Operation & Maintenance Manual

PREMIER INDUCED DRAFT COOLING TOWERS

Premier Tower Specifications

Engineering Drawings

Premier Optional Accessories

Premier Installation, Operation & Maintenance Manual

TM SERIES INDUCED DRAFT COOLING TOWERS

TM Series Tower Specifications

Engineering Drawings

TM Series Optional Accessories

TM Series Installation, Operation & Maintenance Manual

PACKAGED COOLING SYSTEMS

Packaged Cooling Systems Data Sheet

COOLING TOWER ACCESSORIES

Storage Tanks

Prewired Control Panels

Installation Platforms

CONDITIONS OF SALE AND WARRANTY

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973-586-2201 / 973-586-2243 fax

The information, recommendations, and opinions set forth herein are offered

solely for your consideration, inquiry and verification and are not, in part or total,

to be construed as constituting a warranty or representation for which we assume

legal responsibility. Nothing contained herein is to be interpreted as authorization

to practice a patented invention without a license.


Delta Cooling Towers, Inc. was founded to manufacture and market the initial concept of a

maintenance free seamless one-piece non-corrosive Polyethylene cooling towers, and sold its first

unit in June 1971.

Delta's PIONEER ® forced draft cooling tower line is factory assembled in single modules from 10

through 100 tons of cooling capacity.

Delta's PARAGON ® induced draft cooling towers are factory assembled in single modules, from 100

to 250 tons in single modules.

Delta’s PREMIER induced draft cooling towers are offered in 6 single-cell models ranging from

250-500 cooling tons, and features a low profile design. They are designed for ease of

installation to span existing cooling tower structural supports. The Premier towers come

standard pre-mounted on a steel platform.

Delta's TM Series cooling towers are supplied from 250 up to 2000-ton capacity in multi-module

systems, and are CTI certified. They are a double wall polyethylene construction designed in two

sections for shipment purposes. The tower section includes the wet decking, the hot water

distribution system, the mist eliminator and the motor/fan assemblies with the velocity recovery

fan stacks. The other section is the cold-water basin.

In 1981 Delta entered the air stripper market and currently markets a standard line of

VANGUARD ® packed column air strippers from 1' through 5' diameter. Larger custom designed

systems can be provided up to 15' diameter.

Delta prides itself in its ability to provide the technical expertise necessary to meet the requirements

of any application with respect to stripper design, materials of construction, type of packing and

total system capability. Our capabilities are listed in our general literature, which also shows

installation photographs of some of Delta’s air stripper applications.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973-586-2201 / 973-586-2243 fax

The information, recommendations, and opinions set forth herein are offered

solely for your consideration, inquiry and verification and are not, in part or total,

to be construed as constituting a warranty or representation for which we assume

legal responsibility. Nothing contained herein is to be interpreted as authorization

to practice a patented invention without a license.


Delta Cooling Towers are made from a CORROSION PROOF engineered plastic. The

cooling tower shell will never rust, flake, chip, peel or ever need painting or protective

coatings applied. Delta believes its towers are the future of the industry. Metal towers do

not have the long-term corrosion protection advantages for outdoor usage. The

galvanizing or other metal treatments only delay the corrosion of the underlying, often

thin gauge sheet metal.

Delta manufactures a totally SEAMLESS cooling tower. Delta towers are the only large

packaged cooling towers in the industry that have a “one-piece” shell. This means there

are no seams, panels, rivets or other fasteners to fail: compromising the performance or

integrity of the product.

Delta stands behind its products with the best warranty in the industry. Delta provides a

15-YEAR WARRANTY on the cooling tower’s structural shell. In addition, Delta’s

cooling tower motors have a 5-year warranty.

Delta Cooling Towers are LOW MAINTENANCE by design. Delta has carefully designed its

products to minimize maintenance issues. Other manufacturers’ towers utilize a more

complicated design to achieve the same performance result. These designs include many

more parts, thereby requiring more maintenance. On Delta towers there are no gear

reducers, couplings, additional shafts, or extra bearings to maintain.

Delta prides itself on exceptional CUSTOMER SERVICE. Our “can-do” mindset allows us

to meet or exceed any customer’s cooling tower requirements. We offer many product

options and can provide any accessories associated with cooling towers.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973-586-2201 / 973-586-2243 fax

www.deltacooling.com

The information, recommendations, and opinions set forth herein are offered

solely for your consideration, inquiry and verification and are not, in part or total,

to be construed as constituting a warranty or representation for which we assume

legal responsibility. Nothing contained herein is to be interpreted as authorization

to practice a patented invention without a license.


Principle of Cooling

Towers

All cooling towers operate

on the principle of

removing heat from water

by evaporating a small

portion of the water that is

re-circulated through the

unit.

The heat that is removed is

called the latent heat of

vaporization.

Each one pound of water

that is evaporated removes

approximately 1,000

BTU’s in the form of latent

heat.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax

Cooling Tower Terms

and Definitions

APPROACH

The difference between the

temperature of the cold water

leaving the tower and the wetbulb

temperature of the air is

known as the approach.

Establishment of the

approach fixes the operating

temperature of the tower and

is a most important

parameter in determining

both tower size and cost.

BLEED OFF

The circulating water in the

tower which is discharged to

waste to help keep the

dissolved solids concentration

of the water below a

maximum allowable limit. As

a result of evaporation,

dissolved solids concentration

will continually increase

unless reduced by bleed off.

BTU

A BTU is the heat energy

required to raise the

temperature of one pound of

water one degree Fahrenheit

in the range from 32°F to

212°F.

COOLING RANGE

The difference in temperature

between the hot water

entering the tower and the

cold water leaving the tower

is the cooling range.

DRIFT

The water entrained in the air

flow and discharged to the

atmosphere. Drift loss does

not include water lost by

evaporation. Proper tower

design can minimize drift

loss.

HEAT LOAD

The amount of heat to be

removed from the circulating

water within the tower. Heat

load is equal to water

circulation rate (gpm) times

the cooling range times 500

and is expressed in BTU/hr.

Heat load is also an important

parameter in determining

tower size and cost.

MAKEUP

The amount of water required

to replace normal losses

caused by bleed off, drift, and

evaporation

PUMPING HEAD

The pressure required to

pump the water from the

tower basin, through the

entire system and return to

the top of the tower.

TON

An evaporative cooling ton is

15,000 BTU’s/hr.

The information, recommendations, and opinions set forth herein are offered

solely for your consideration, inquiry and verification and are not, in part or total,

to be construed as constituting a warranty or representation for which we assume

legal responsibility. Nothing contained herein is to be interpreted as authorization

to practice a patented invention without a license.


Suggested Summer Design

Wet Bulb Temperatures for

Various U.S Cities

Degree F

State City 1% 5% 15%

Alabama

Birmingham 79 77 76

Mobile 80 79 77

Montgomery 80 78 76

Arizona

Flagstaff 62 59 57

Phoenix 77 75 73

Tucson 73 71 70

Yuma 79 77 75

Arkansas

Little Rock 80 78 77

California

Bakersfield 72 70 67

El Centro 81 79 76

Fresno 73 71 68

Long Beach 72 69 66

Los Angeles 69 67 65

Needles 76 74 72

Oakland 66 63 60

Sacramento 72 69 66

San Diego 71 68 66

San Francisco 65 62 59

Colorado

Denver 65 63 60

Connecticut

Hartford 77 74 72

New Haven 77 75 72

Delaware

Wilmington 79 76 74

D.C.

Washington 78 76 74

Florida

Jacksonville 80 79 77

Miami 80 79 78

Pensacola 82 80 79

Tampa 80 79 77

Georgia

Alma 81 79 77

Atlanta 78 76 74

Augusta 80 78 77

Savannah 81 79 77

Idaho

Boise 68 65 61

Illinois

Chicago 78 75 72

Peoria 78 76 72

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

.

973/586-2201 / 973/586-2243 fax

The chart shows the average percent of time (June thru September) that the wet bulb

temperature will equal or exceed the degree Fahrenheit value shown.

Degree F

State City 1% 5% 15%

Indiana

Evansville 79 77 75

Fort Wayne 77 75 71

Indianapolis 78 76 73

Iowa

Des Moines 79 76 73

Sioux City 79 76 72

Kansas

Wichita 77 75 73

Kentucky

Louisville 79 77 74

Louisiana

New Orleans 81 79 78

Shreveport 81 79 78

Maine

Augusta 74 71 67

Caribou 72 68 64

Portland 75 71 67

Maryland

Baltimore 79 77 74

Massachusetts

Boston 76 73 70

Worcester 75 71 68

Michigan

Detroit 76 74 70

Flint 77 74 70

Grand Rapids 76 73 70

Pellston 74 71 67

Minnesota

Duluth 73 69 65

Minneapolis 78 74 70

St. Cloud 77 73 69

Missouri

Kansas City 79 76 74

St. Louis 79 77 74

Mississippi

Jackson 80 78 77

Greenwood 81 80 78

Montana

Billings 68 65 62

Helena 65 61 58

Missoula 65 61 58

Nebraska

Lincoln 78 76 72

Omaha 79 76 73

Nevada

Reno 64 61 58

Las Vegas 72 70 66

New Hampshire

Concord 75 72 68

Degree F

State City 1% 5% 15%

New Jersey

Camden 79 77 74

Newark 77 75 72

New Mexico

Albuquerque 66 65 63

Carlsbad 72 71 69

Santa Fe 65 63 61

New York

Albany 76 73 70

Buffalo 75 72 69

New York 77 75 72

Rochester 75 72 69

Syracuse 76 73 70

North Carolina

Asheville 76 74 71

Charlotte 78 76 74

Greensboro 77 76 73

Raleigh 79 77 75

Wilmington 82 80 78

North Dakota

Bismarck 75 71 67

Ohio

Akron 76 74 71

Canton 76 74 71

Cincinnati 79 77 74

Cleveland 76 74 71

Columbus 78 75 72

Dayton 77 74 71

Youngstown 75 73 69

Oklahoma

Oklahoma City 78 76 74

Tulsa 79 77 75

Oregon

Baker 66 63 59

Medford 70 66 63

Portland 69 66 62

Salem 69 66 62

Pennsylvania

Altoona 75 73 70

Erie 76 73 70

Harrisburg 76 74 71

Philadelphia 78 76 73

Pittsburgh 75 73 70

Rhode Island

Providence 76 74 70

Degree F

State City 1% 5% 15%

South Carolina

Charleston 81 79 77

Columbia 79 78 76

Greenville 77 75 73

South Dakota

Sioux Falls 77 74 70

Tennessee

Chattanooga 78 77 75

Knoxville 77 76 74

Memphis 80 79 77

Nashville 79 77 75

Texas

Abilene 76 74 72

Austin 79 77 76

Corpus Christi 81 80 79

Dallas 79 78 76

El Paso 70 68 67

Fort Worth 78 76 75

Galveston 82 81 80

Houston 80 79 78

Lubbock 73 72 70

Port Arthur 81 80 79

San Angelo 74 73 71

San Antonio 77 76 75

Wichita Falls 77 76 74

Utah

Salt Lake City 67 64 62

Vermont

Burlington 75 72 68

Virginia

Norfolk 79 78 76

Richmond 79 77 75

Roanoke 76 74 72

Washington

Seattle 66 63 60

Spokane 66 63 60

Tacoma 66 63 60

Walla Walla 69 66 63

Yakima 69 65 62

West Virginia

Charleston 77 75 73

Elkins 75 72 70

Parkersburg 78 75 73

Wisconsin

Madison 77 74 70

Milwaukee 77 73 70

Wyoming

Cheyenne 63 61 59

The information, recommendations, and opinions set forth herein are offered

solely for your consideration, inquiry and verification and are not, in part or total,

to be construed as constituting a warranty or representation for which we assume

legal responsibility. Nothing contained herein is to be interpreted as authorization

to practice a patented invention without a license.


Country City C

EUROPE

AUSTRIA

Salzburg 21.0

Vienna 21.5

BELGIUM

Brussels 21.0

CYPRUS

Nicosia 24.0

CZECH REPUBLIC

Prague 19.5

DENMARK

Copenhagen 21.0

GERMANY

Berlin 20.0

Bremen 20.0

Cologne 21.0

Frankfurt A.M 21.5

Hamburg 19.0

Hanover 20.0

Kaiserslautern 21.0

Karlsruhe 21.0

Leipzig 21.0

Mannheim 21.5

Munich 21.0

Nuremberg 20.0

Saarbrucken 21.0

Stuttgart 21.0

FINLAND

Helsinki 19.0

FRANCE

Bordeaux 23.5

Lyon 22.0

Marseile 22.5

Paris 21.5

Strasburg 22.0

GREAT BRITIAN

Birmingham 19.5

Glasgow 18.0

London 19.0

GREECE

Athens 22.5

HUNGARY

Budapest 21.0

ICELAND

Reykjavik 14.0

IRELAND

Dublin 19.0

ITALY

Florence 21.5

Genoa 24.5

Milan 23.0

Naples 24.0

Palermo 25.0

Rome 23.0

Turin 24.0

Venice 24.5

NETHERLANDS

Amsterdam 20.0

Den Haag 20.0

Rotterdam 21.0

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

.

973/586-2201 / 973/586-2243 fax

Country City C

NORWAY

Oslo 19.5

POLAND

Warsaw 21.0

PORTUGAL

Lisbon 22.5

RUMANIA

Bucharest 23.0

RUSSIA

Moscow 20.5

SPAIN

Barcelona 24.0

Madrid 22.5

SWEDEN

Stockholm 19.5

SWITZERLAND

Basel 22.0

Bern 20.5

Geneva 21.0

Lucerne 21.0

Zurich 20.5

YUGOSLAVIA

Belgrade 23.0

AFRICA

ALGERIA

Algiers 22.5

Oran 26.0

ANGOLA

Luanda 27.0

EQYPT

Alexandria 25.5

Cairo 24.5

Luxor 27.0

ETHIOPIA

Addis Ababa 19.0

GHANA

Accra 19.0

KENYA

Nairobi 27.0

LIBERIA

Monrovia 27.0

LIBYA

Tripoli 27.0

MOROCCO

Casablanca 25.0

Tangier 24.0

SENEGAL

Dakar 23.0

SIERRA LEONE

Freetown 27.0

SOUTH AFRICA

Durban 25.0

Johannesburg 21.0

Cape Town 22.0

Pretoria 22.0

SUDAN

Khartoum 27.0

Port Sudan 31.0

SWAZILAND

Windhoek 19.0

TANZANIA

Dar Es Salaam 28.0

Country City C

TUNISIA

Tunis 27.0

ZAIRE

Kinshasa 28.0

Lubumbashi 21.0

NORTH AMERICA

CANADA

Montreal 23.0

Ottawa 23.0

Toronto 24.5

Quebec 23.0

Vancouver 20.0

AUSTRALASIA

AUSTRALIA

Adelaide 20.5

Brisbane 24.5

Melborne 23.0

Sydney 22.5

NEW ZEALAND

Auckland 23.0

ASIA

AFGHANISTAN

Kabul 21.0

CHINA

Canton 28.0

Shanghai 28.0

Hong Kong 28.0

INDIA

Bombay 28.0

Delhi 25.0

Calcutta 28.5

Madras 28.0

INDONESIA

Djakarta 26.5

IRAN

Teheran 22.0

IRAQ

Baghdad 23.5

Basra 28.0

ISRAEL

Haifa 26.5

Jerusalem 21.5

Tel Aviv 26.5

JAPAN

Hiroshima 28.0

Osaka 28.0

Tokyo 26.5

JORDAN

Amman 23.0

KOREA

Seoul 26.0

KUWAIT

Kuwait 29.5

LEBANON

Beirut 26.0

PAKISTAN

Karachi 28.0

PHILIPPINES

Manila 28.0

Country City C

RUSSIA

Vladivostok 22.0

SAUDI ARABIA

Riyadh 26.0

Jeddah 30.5

Dhahran 30.0

SINGAPORE

Singapore 28.0

SRI LANKA

Colombo 28.0

SYRIA

Damascus 23.0

THAILAND

Bangkok 28.0

TURKEY

Ankara 30.5

Istanbul 23.0

VIETNAM

Hanoi 30.0

Saigon 28.5

SOUTH AMERICA

ARGENTINA

Buenos Aires 24.0

BOLIVIA

La Paz 14.0

BRAZIL

Manaos 27.0

Rio de Janeiro 25.5

Sao Paulo 24.0

CHILE

Santiago 21.0

Valparaiso 20.0

COLUMBIA

Bogota 18.0

CUBA

Havana 26.5

GUATEMALA

Guatemala 23.0

MEXICO

Mexico City 16.5

NICARAGUA

Managua 25.5

PANAMA

Panama 26.0

PERU

Lima 24.0

PUERTO RICO

San Juan 26.0

URUGUAY

Montevideo 23.5

VENEZUELA

Caracas 22.5

Maracaibo 28.0

The information, recommendations, and opinions set forth herein are offered

solely for your consideration, inquiry and verification and are not, in part or total,

to be construed as constituting a warranty or representation for which we assume

legal responsibility. Nothing contained herein is to be interpreted as authorization

to practice a patented invention without a license.


Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax

Mechanical Properties:

Polyethylene (Shell Material) Test Method Properties

1. Tensile Strength (@ 20m./min.) ASTM D 638 2600-3000

2. Stiffness Modulus ASTM D 747 56-70 X 103 psi

3. Tensile Impact Strength ASTM D 1822 90-130 ft. lb. /in.2

4. Elongation (@ 20in./min.) ASTM D 638 150-350%

5. Vicat Softening Point ASTM D 1525 230°/238°F

6. Deflection Temperature at 66psi ASTM D 648 172°F

7. Brittleness Temperature ASTM D 746 -94°F

PVC (Wet Decking & Eliminator Material) Test Method Properties

1. Tensile Strength ASTM D 638 7100 psi

2. Flexural Modulus ASTM D 790 300-500 x 103 psi

3. Izod Impact ASTM D 256 0.73 ft. lb/in.

4. Elongation ASTM D 638 150%

5. Deflection Temperature at 66psi ASTM D 648 155°F

6. Brittleness Temperature ASTM D 746 -15°F

PVC (Water Distribution System Material) Test Method Properties

1. Tensile Strength ASTM D 638 7500 psi

2. Flexural Modulus ASTM D 790 560 x 103 psi

3. Izod Impact 140°F ASTM D 256 1.26 ft. lb/in. notch

4. Izod Impact at –40°F ASTM D 256 .035 ft. lb/in. notch

5. Deflection Temperature at 66psi ASTM D 648 169°F

Permanence Tests:

Test Method Polyethylene PVC

1. Outdoor Weathering ASTM D 1435-65T Complete Protection Excellent

2. Accelerated Weathering ASTM E 42 Very Resistant Very Resistant

3. Normal Exposure to Sunlight Complete Protection Complete Protection

4. Accelerated Exposure to Sunlight FADEOMETER Complete Protection Complete Protection

Chemical Properties:

Test Method Polyethylene PVC

1. Weak Acids ASTM D 543 Very Resistant No Effect

2. Strong Acids ASTM D 543 None to Slight None to Slight

3. Weak Alkali ASTM D 543 Very Resistant No Effect

4. Strong Alkali ASTM D 543 Very Resistant No Effect

5. Salts ASTM D 543 Resistant No Effect

6. Sea Salts ASTM D 543 Resistant No Effect

The information, recommendations, and opinions set forth herein are offered

solely for your consideration, inquiry and verification and are not, in part or total,

to be construed as constituting a warranty or representation for which we assume

legal responsibility. Nothing contained herein is to be interpreted as authorization

to practice a patented invention without a license.


DELTA COOLING TOWERS

SIZING & APPLICATION DATA SHEET

COMPANY :____________________________________________________________

ADDRESS:______________________________________________________________

CITY:________________________ STATE:______________ ZIP:_____________

COUNTRY: _____________________________________________________________

CONTACT NAME:______________________________________________________

PHONE:____________________________ FAX:______________________________

EMAIL:__________________________________________________________________

APPLICATION: HVAC / INDUSTRIAL (CIRCLE ONE)

OPERATING CONDITIONS: GALLONS PER MINUTE: ________ GPM

HOT WATER (from process): ________°F COLD WATER (return to process): _______°F

WET BULB TEMPERATURE: ___________°F

RANGE (Difference between hot & cold water) : __________________

APPROACH (Cold water minus Wet Bulb Temp.) :__________________

Please email completed form sales@menaits.com, or fax 001­866­544­8280.

Thank you for considering MENA Industrial Technology Supply, Inc.

MENA Industrial Technology Supply, Inc. 2345 CR #38 – Brasher Falls, NY 13613 USA – 001­214­402­1319

www.menaits.com ­ sales@menaits.com


DELTA COOLING TOWERS

SIZING & APPLICATION DATA SHEET

COMPANY :____________________________________________________________

ADDRESS:______________________________________________________________

CITY:________________________ STATE:______________ ZIP:_____________

COUNTRY: _____________________________________________________________

CONTACT NAME:______________________________________________________

PHONE:____________________________ FAX:______________________________

EMAIL:__________________________________________________________________

APPLICATION: HVAC / INDUSTRIAL (CIRCLE ONE)

OPERATING CONDITIONS: GALLONS PER MINUTE: ________ GPM

HOT WATER (from process): ________°F COLD WATER (return to process): _______°F

WET BULB TEMPERATURE: ___________°F

RANGE (Difference between hot & cold water) : __________________

APPROACH (Cold water minus Wet Bulb Temp.) :__________________

Please email completed form sales@menaits.com, or fax 001­866­544­8280.

Thank you for considering MENA Industrial Technology Supply, Inc.

MENA Industrial Technology Supply, Inc. 2345 CR #38 – Brasher Falls, NY 13613 USA – 001­214­402­1319

www.menaits.com ­ sales@menaits.com


DELTA COOLING TOWERS

SIZING & APPLICATION DATA SHEET

COMPANY :____________________________________________________________

ADDRESS:______________________________________________________________

CITY:________________________ STATE:______________ ZIP:_____________

COUNTRY: _____________________________________________________________

CONTACT NAME:______________________________________________________

PHONE:____________________________ FAX:______________________________

EMAIL:__________________________________________________________________

APPLICATION: HVAC / INDUSTRIAL (CIRCLE ONE)

OPERATING CONDITIONS: GALLONS PER MINUTE: ________ GPM

HOT WATER (from process): ________°F COLD WATER (return to process): _______°F

WET BULB TEMPERATURE: ___________°F

RANGE (Difference between hot & cold water) : __________________

APPROACH (Cold water minus Wet Bulb Temp.) :__________________

Please email completed form sales@menaits.com, or fax 001­866­544­8280.

Thank you for considering MENA Industrial Technology Supply, Inc.

MENA Industrial Technology Supply, Inc. 2345 CR #38 – Brasher Falls, NY 13613 USA – 001­214­402­1319

www.menaits.com ­ sales@menaits.com


DELTA

Cooling Towers, Inc.

Pioneer ® cooling towers

are forced draft counter flow

design cooling towers with

single module capacities from 10

to 100 cooling tons. These

towers are a unitary seamless

engineered plastic design that

Delta has been manufacturing

since 1971 and have been the

standard for long-term trouble-

free operation.

PIONEER ®

Forced Draft, Counter Flow Design

10 - 100 Ton Single Modules

STANDARD FEATURES:

��Seamless Engineered Plastic (HPDE) Shell

��Corrosion Proof Construction

��Forward Curved Centrifugal Blower with Totally Enclosed Motor.

��Factory Assembled for Simple Installation

��15 Year Shell Warranty

��PVC Water Distribution System with Non-clog Large Orifice

Removable Nozzles

��High Efficiency PVC Fill

��Made in the USA

Compare the value Delta Cooling Towers offer against the

value of other comparable units. You will find the benefits

we can provide are unique and superior:

��Cost Reduction - save water costs and sewer taxes. A Delta

cooling tower pays for itself by recirculating water.

��Non-Corrosive Materials of Construction - impervious to

chemicals, acids, and salts.

��Cost Less to Maintain - will not rust, chip, or ever require

painting for extraordinary tower life.

��Unique Design - provides unlimited flexibility of modular

operation, future upgrade capablity, and location convenience.

��One-Piece Construction - strong and long lasting. Shell is

backed by a 15 year warranty.

��Cost Less to Install - light weight construction reduces rigging

and structural roof support requirements. Maintenance costs

and water treatment chemicals cost are significantly lowered.

OPTIONS AVAILABLE:

��Mounting Platforms

��Two Speed Motors

��Thermostatic On/Off Fan Control Package

��Anti Freeze Basin Heaters

��Pump(s)

��Sump Level Switches

��Stainless Steel Basket Strainers

��Control Panels

��Storage Tanks

Phone: 973-227-0300 • 800-BUY-DELTA • Fax: 973-227-0458 • www.deltacooling.com


DELTA

Cooling Towers, Inc.

CORROSION-

PROOF SHELL

HDPE Plastic

Construction can not

corrode and is

backed by 15 Year

Warranty.

LIGHTWEIGHT

AND HEAVY

DUTY

Plastic is lighter than

conventional cooling

towers and average

wall thickness is 5-10

times sheet metal

towers.

LEAK-PROOF

SUMP

Molded as Unitary

(One-Piece) Structure

that has no joints to

leak or require recaulking

and sealing.




PIONEER ®

Forced Draft, Counter Flow Design

10 - 100 Ton Single Modules

• •

FILL MATERIAL

DRIFT

ELIMINATOR

PVC drift eliminator

prevents water droplets

from leaving the tower.

NOZZLE WATER

DISTRIBUTION

SYSTEM

Non-Clog large orifice

removable nozzles evenly

distribute the water.

AIR MOVING

SYSTEM

Totally enclosed

cooling tower motor

powers centrifugal

blower with optional

HDPE weather hood.

Model Approximate Weight Dimensions Capacity Fan Motor Sump Capacity

Number Shipping Operating Dia. x Ht. Tons HP Gallons

Δt-10 350 705 38" x 78" 10 1 40

Δt-15 360 725 38" x 78" 15 1.5 40

Δt-20 385 750 38" x 78" 20 2 40

Δt-25 405 765 38" x 78" 25 3 40

Δt-30 710 1500 56" x 76" 30 5 75

Δt-40 730 1525 56" x 76" 40 5 75

Δt-50 910 2610 80" x 80" 50 5 157

Δt-75 970 2675 80" x 80" 75 7.5 157

Δt-100 1030 2730 80" x 80" 100 10 157

The information, recommendations and opinions set forth herein are offered solely for your consideration, inquiry and verification, and are not,

in part or total, to be construed as constituting a warranty or representation for which we assume legal responsibility.

Delta Cooling Towers

Leader in Non-Corrosive Cooling Tower Technology

Tel: 973-227-0300 • Fax: 973-227-0458 • 800-BUY-DELTA • www.deltacooling.com


High efficiency spiral wound

PVC for maximum cooling.


Delta Cooling Towers, Inc.

41 Pine Street

P.O. Box 315

Rockaway, New Jersey 07866-0315

Telephone 973.586.2201

Fax 973.586.2243

www.deltacooling.com

sales@deltacooling.com

Pioneer ® Forced Draft Cooling Tower Specifications

Pioneer ® cooling towers are a forced draft counter-flow cooling tower with single module

capacities from 10 to 100 cooling tons. These towers are a unique design that Delta

Cooling Towers has been manufacturing since 1971 and have been very well received

in both commercial and industrial applications. There are two overriding principles that

make Pioneer ® cooling towers an excellent selection.

The towers are corrosion-proof, not corrosion-protected, which is an important

distinction of Delta towers. Cooling towers are outdoor equipment, either on roofs or

sides of buildings, and are subjected to weather extremes continuously. Delta towers

are manufactured in a seamless engineered plastic (HDPE) structural shell which is

corrosion-proof and will not rust, chip, peel, crack or ever need painting or additional

protective coatings. Comparably priced towers are often sheet metal with a galvanized

coating. Zinc galvanizing provides only an interim protection against corrosion. This

galvanizing wears away, often unevenly, exposing sheet metal to the rapid corrosive

environment of cooling tower duty. The first engineered plastic cooling towers Delta

shipped in 1971 show no signs of degradation in the structural shell today!

The second principle of Delta towers is the engineering that led to a simplicity of design,

translating into reliability and a trouble-free life of the towers. From the seamless

cooling tower shell to the easy to maintain blower assembly, there are less overall

components and systems within the tower to maintain. The towers are shipped factory

complete with little more installation steps than hooking up the electrical and water.

This design simplicity is recognized in many other industries as a key goal and leads to

greater reliability and owner peace of mind.

The Pioneer ® design has a tremendous track record for long-term durability and

continues to be the choice for cooling tower application up to 100 cooling tons.


Delta Cooling Towers, Inc, Pioneer ! Forced Draft Cooling Tower Specifications, Page 2 of 5

PART 1 GENERAL

1.1 SCOPE

PIONEER ! FORCED DRAFT COOLING TOWER

Work included to furnish and install Delta Cooling Tower Model !t_____ cooling

tower(s) consisting of all equipment necessary to provide a complete operating

system to remove specified heat load. Cooling towers shall be packaged, factory

pre-assembled to the fullest extent possible, forced draft, counter flow design

1.2 RELATED WORK

{insert related work document here}

1.3 REFERENCES - STANDARDS

AMCA - Air Moving and Conditioning Association

ASTM - American Society for Testing and Materials

ANSI - American National Standards Institute

ASME - American Society of Mechanical Engineers

1.4 QUALIFICATIONS

The cooling tower shall be manufactured by a company with at least 30 years

experience manufacturer of seamless engineered polyethylene cooling tower

systems.

1.5 WARRANTY

Shell shall be warranted for 15 years and all other equipment shall be warranted

for one year against material and workmanship defects from date of shipment.

1.6 SUBMITTALS

Shop drawings shall be provided and shall include but not be limited to:

A. System dimension

B. Operating and dry weight

C. Details of equipment

D. Mounting and support requirements

E. Descriptions and specifications

PART 2 PRODUCT

The cooling tower specified shall be factory assembled to the fullest extent

possible.


Delta Cooling Towers, Inc, Pioneer ! Forced Draft Cooling Tower Specifications, Page 3 of 5

2.1 Forced Draft Cooling Tower, _____ tons capacity, _____GPM, ____ " F hot

water temperature, ____"F cold water temperature, ____"F wet bulb

temperature

A. Cooling tower

1. Shell shall be seamless, non-corrosive, hi-impact high density

polyethylene (HDPE) of leak proof design. Shell wall shall exceed 1/4"

average thickness. Structural shell shall be warranted for 15 years by

the manufacturer. The structural shell shall be capable of withstanding

water temperatures up to 160"F on a continual basis.

2. Sump shall be integral with cooling tower shell, creating a one-piece

seamless structure.

3. Inspection port with removable HDPE cover located above the integral

cold sump for accessibility to automatic make-up valve and adjustable

float.

4. Fittings shall be non-corrosive polyvinyl chloride (PVC) bulkhead fittings

with neoprene gaskets for inlet, outlet, drain, overflow and make-up (FPT)

connections.

5. All outlet fittings for pump suction applications shall be provided with a

vortex breaker.

6. Make up assembly, when incorporated in the sump of the cooling tower,

shall be a mechanical valve assembly, adjustable height for varying

operating conditions.

The engineered plastic shell is the optimum material for cooling tower construction. The material

is molded into a totally seamless shell which will never leak, unlike conventional cooling towers

which require many panels, joints, seams, seam gaskets, caulking and hundreds of bolts or other

fasteners to maintain the integrity of the product. The Delta structural shell will never rust, chip,

crack or ever need painting or further protective coatings. The structural shell is warranted for

15 years which is much longer than other available cooling towers.

Galvanized steel towers provide only interim corrosion protection. The zinc galvanizing is

designed only to delay corrosion as the zinc wears steadily away. Moderately high temperatures

and various water chemical treatments speed up this leaching of zinc into the water or

atmosphere. With only ounces per square foot of corrosion protection, it is only a matter of

time till corrosion of the underlying sheet steel sets in.

Thin fiberglass panels can also not match the structural integrity of Deltas' seamless engineered

plastic. Over time, if that long, leaks can develop at the joints even with gaskets and caulking

applied. Thin fiberglass when exposed to the wide range of outdoor weather elements is also

subject to delaminating, wicking and overall degradation


Delta Cooling Towers, Inc, Pioneer ! Forced Draft Cooling Tower Specifications, Page 4 of 5

B. Water distribution

Totally enclosed, non-corrosive, polyvinyl chloride (PVC) spray tree with

non-clog full cone spray nozzle distribution system. Threaded nozzle(s)

shall be interchangeable and shall be capable of being substituted with a

larger diameter orifice for increased flow conditions without increasing inlet

pressure.

C. Wet decking

Spirally wound and bonded, one-piece, non-corrosive, polyvinyl chloride

(PVC) wet decking. Non-corrosive, (PVC) hand straps secured to wet

decking and drift eliminator sections for easy removal.

D. Drift eliminator

Drift eliminator shall be spirally wound and bonded, one-piece, non-corrosive,

polyvinyl chloride (PVC) with non-corrosive PVC straps for easy removal for

internal inspection and maintenance.

E. Fan assembly

1. Forward curved centrifugal belt driven blower assembly, statically and

dynamically balanced wheel, constructed of heavy duty, corrosionresistant

steel with dipped and baked alkyd finish.

2. Motor shall be Totally Enclosed Fan Cooled suitable for 208 or 230/460

volt, 3 phase, 60 cycle operation.

3. Motor shall be warranted against defects in materials and workmanship

for 5 years.

F. Blower Hood

1. Blower hood shall completely enclose the blower, motor and rotating

machinery to offer maximum protection to personnel.

2. Blower hood shall provide protection against rain and windblown debris

entering blower inlet, also protect the motors and drives.

3. Blower hood shall be molded from high density polyethylene (HDPE)

consistent with the tower shell.

4. Blower hood shall dampen sound of blower assembly by 3 dBA at 5 feet.


Delta Cooling Towers, Inc, Pioneer ! Forced Draft Cooling Tower Specifications, Page 5 of 5

5. Hood inlets shall be covered with a PVC coated 3/8" #2 wire mesh screen

fastened to the hood with stainless steel hardware.

G. Hardware

PART 3 EXECUTION

All hardware shall be 304 Stainless Steel

1. GENERAL - INSTALLATION

Installation of equipment shall conform to or be in compliance with the

manufacturers recommendations.

2. TESTING

A. Contractor shall perform all field testing and final adjustment of cooling tower

equipment in accordance with provision of manufacturer

B. Contractor shall certify that all operation criteria is within normal operating

range as specified by the manufacturer.

C. Should any part of the cooling tower equipment fail to meet any specified

requirement, adjust, repair or replace any and all defects or inoperative parts

immediately with manufacturers recommended parts or procedures.


AIRFLOW SWITCH

The airflow switch is desirable when loss of airflow will have an adverse affect on system operation.

This switch will indicate loss of airflow from many causes including, but not limited to: belt slippage, belt

failure, motor failure, thermal overload shutdown, media failure, etc.

The airflow switch is an on/off device that can be operated in two modes:

A) Will indicate total loss of airflow as installed at the factory, or

B) Can indicate loss of a limited amount of airflow by varying the insertion depth of the sensing

elements.

The enclosure is rated NEMA 7 and 9 as standard. The contacts have a rating of 5 amperes at 125/250

VAC and are SPDT. It can be utilized for system shutdown, warning lights, or other functions.

ANTIFREEZE PACKAGE / RESISTANCE HEATING OPTION

The antifreeze package is supplied to provide protection against freezing of standing water in the cooling

tower sump due to shutdown during winter operation. The option is provided when draining the system

during periods of prolonged shutdown is not feasible, such as during weekends, or when a separate

gravity feed indoor storage tank is not part of the re-circulation system. Resistance heating of the sump

water provides protection, and this package includes the following components:

Immersion Heater:

Capacity sized for service ~ NEMA 4 enclosure

t-10 thru t-25 2000 watt – 2” thread

t-10 thru t-40 4500 watt – 2.5” thread

t-50 thru t-150 6000 watt – 2.5” thread

Thermostat Assembly:

Thermostat is to be set in field. Recommended setting is approximately 38°F.

NEMA 4 enclosure with SPDT switch ~ 30-130°F temperature range ~ 120/277 Volt

with ¾” SCH 80 bulkhead fitting and a ¾” x ½” SCH 40 reducer

Liquid Level Switch Assembly:

NEMA 7 and 9 enclosures are standard on this SPDT level switch. This insures that the

heating element is submerged prior to energizing to prevent immersion heater burn cause

of low water level.

Heater Contactor:

NEMA 1 enclosure is standard. Open style for control panel mounting is available. This

contactor is mounted in the control panel when the panel is purchased from Delta.

PVC bulkhead fittings, for local installation, are included in component prices. Protection of external

piping by heat tracing and insulation is recommended but not included.

ANTIFREEZE PACKAGE / SOLENOID DRAIN VALVE

This option is utilized when freezing of standing water in the cooling tower sump could occur due to system

shutdown during winter operation. An electrically actuated valve will open when the pumps are not operating

and the temperatures approach freezing. The valve can be installed in the sump drain fitting of the tower (at

the factory) or remotely at the piping low point (by others in the field).

Components provided are:

A) Electrically actuated to close, spring to open, 2-way valve, 1” line size, with NEMA 4 enclosure.

B) 1” PVC tee

C) 1” PVC plug

D) Temperature switch with bulkhead fitting

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


When power is removed the valve automatically reverts to the open position. This feature ensures freeze

protection even during a power outage.

BLOWER CORROSION PROTECTION

Premium blower corrosion protection is desirable when the unit will be operated in highly corrosive

atmospheres such as paper mills, coastal areas, chemical plants, etc. The premium blower corrosion

protection option consists of complete PVC encapsulation of the blower wheel and housing and frame. A T-

304 stainless steel shaft is also included. This option offers an extremely cost effective alternative to FRP

blower assemblies. The blowers and frames are prepared at the factory with all holes and cutouts completed.

The entire assembly is sandblasted and then dipped in a molten PVC solution that coats the entire surface.

When dry, the PVC attains an average thickness of 30 mils and forms a complete covering of the standard

frame and rousing. The blower wheel is coated in the same manner, except for the shaft bore, and is then

rebalanced both statically and dynamically. After final assembly, the shaft and sheaves are coated with a

specially formulated shaft coating material that conforms to MIL-C-16173D, GR 1 & 4. The result is a

blower assembly that will give years of corrosion free service even under the most adverse conditions.

BLOWER GUARD

The blower guard offers protection from accidentally contacting the rotating components of the fan such as

the wheel, shafts and the v-belts. The blower guard is also utilized as a screen for outdoor installations to

prevent leaves and other debris from entering the tower through the double-sided blower inlets.

The guard is fabricated of PVC coated 3/8” #2 wire mesh screen attached to the blower frame with stainless

steel fasteners.

BLOWER HOOD

The blower hood completely enclosed the blower to offer maximum protection to personnel who might

accidentally contact the rotating components. The blower hood provides protecting against rain and

windblown debris entering the standard double inlet blower assemblies. It also protects the motors and drives

from water spray which may affect their operation. Furthermore, the hood offers an aesthetic quality to the

blower assembly because it is molded from the same medium density polyethylene material as the tower shell

and its appearance is, therefore, consistent with the tower shell. The hood also serves as an additional sound

dampening device for the already quiet standard Delta blower assemblies. With these hoods properly

installed, a 3-dBA reduction at 5 feet is common. The hood inlets are covered with PVC coated 3/8” #2 wire

mesh screen fastened to the hood with stainless steel hardware.

BLOWER THERMOSTATS – Single Stage and Two-Stage

The fan thermostat is used to minimize operating costs. The thermostat senses water temperature and

controls the blower operation during cold weather service. When cold-water temperature drops below

design, the blower will shut off saving motor hp operating costs and serves as an antifreeze device.

As the cold-water temperature rises and approaches the design temperature, the thermostat signals the

blower to start in order to maintain the cold water design temperature.

A single stage thermostat controls the blower on and off and is provided with a standard single

speed motor.

A two-stage thermostat is required for two speed motor operation and controls the blower from

‘on’ to ‘half speed’ and then to ‘off’. At half speed operation the motor operates at only ¼ full

load BHP. Two stage thermostats must be wired to Delta specifications.

The thermostat has a 5°F differential in its operating range of 30°F to 130°F. The contacts are SPDT and

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


have a 15 Amp UL rating. They are complete with NEMA 4 enclosures suitable for outdoor mounting.

The thermostat can be provided loose, or installed in the cooling tower sump, or an indoor storage tank.

When the thermostat is supplied with a cooling tower or storage tank provided by Delta, the package

includes installation with a ¾” Schedule 80 PVC bulkhead fitting and a ¾” x ½” Schedule 40 PVC

reducer bushing. Thermostat operating range must be set in the field. Recommended setting is

approximately 70°F to 72°F, but will vary depending on the application and the installation location.

BOTTOM OUTLET

A bottom outlet provides for complete drainage of water from the cooling tower sump. This option is

attractive when indoor tanks are utilized for complete drainage of the cooling tower. This prevents

standing water from possibly freezing and damaging PVC piping.

CONTROL PANEL

A control panel is required any time there are electrical devices involved in a system. The standard

features of a Delta supplied control panel are:

A) NEMA 3R water tight enclosure

B) Single speed motor starter

C) 110V transformer with fuses

D) Blower operating lights

E) Blower selector switches

F) Terminal strips

G) 208V or 230V or 460V or 575V / 3Ph / 60Hz

Optional items available:

!" Disconnect switch: either fused, unfused or magnetic circuit breaker type.

!" Motor starter fuses or circuit breakers.

!" Additional motor starters, selector switches and lights to interface with existing systems,

remote pumps, etc.

!" Any other NEMA enclosure manufactured.

!" Pre-mounting of control panel and pre-wiring of skid mounted options with Liquid-Tite

conduit or EMT. (Consult factory for add pricing)

Delta also can provide programmable controllers, computer interfacing, telemetry, and any other type of

control system required. Pre-mounting and pre-wiring of the control panel for a system installation are

available. This minimizes the labor required for field installation.

EQUALIZER FITTINGS

This option is desirable for multiple module installations to provide equal liquid levels in the sumps of the

individual modules and allows for the installation of only one (1) water make-up line. Delta provides the

bulkhead fittings installed in the cooling towers to provide for gravity flow from one tower sump to

another. The equalizer connection is not for full flow transfer (ex: pumping from one unit to another).

The connecting piping should be field installed and is the responsibility of others.

FLANGED ADAPTORS

Standard PVC bulkhead fittings are (FPT) female threaded connections. This option provides 125lb

Schedule 80 PVC flanged connection at approximately 6” projection minimum from the cooling tower.

Gaskets and hardware are not provided by Delta and should be provided by others with the piping

companion flange.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


HIGH SUMP LEVEL SWITCH

The hump sump level switch option is utilized when a potential overflow must be avoided. Switch

elevation is set below the point when the water in the sump will overflow onto the ground. The switch

can be used to illuminate a light, shut off the influent feed pump or initiate some other device or alarm.

This package consists of a NEMA 7 and 9 liquid level switch mounted in a PVC bulkhead fitting

assembly with a 2” x 1” reducer bushing.

MASTIC COATING OF BLOWER ASSEMBLY

Mastic coating of the blower wheel, housing and frame is desirable when additional corrosion protection

is required. The mastic coating is applied directly over the standard enamel finish. This option is

recommended in areas of continuous high humidity. It also provides protection from corrosive

compounds, acids, etc. The material used is a brush on, solvent based, asphaltic film coating which is

impervious to standing water and airborne spray. Mastic coating has proven successful in prolonging the

average life of a standard blower assembly. After final assembly, the blower shaft and sheaves are coated

with a special coating material. This coating conforms to MIL-C-16173D, GR 1 & 4. For best results,

periodic recoating of both the wheel and housing are recommended.

OUTLET STRAINER BASKET

This option is desirable to prevent debris that may have entered the cooling tower sump from getting into

the pump, or the rest of the cooling water system. This option is recommended to minimize particle size

that could foul chillers, heat exchangers, compressors or the cooling tower nozzles. A vortex breaker

pipe, which is provided as standard on pump suction applications, is included to maximize the inlet area

and prevent cavitation. The strainer is made from a vortex breaker pipe surrounded by 3/16” #2 PVC

coated mesh screen. Finer mesh screens can be overlaid to minimize particle size. Consult Delta for add

prices and availability.

PLATFORM

The platform is a desirable option when a flat smooth uniform surface is not available for mounting

Delta’s cooling towers. The platform must be mounted and supported in accordance with Delta’s

recommendations. This option includes a steel-mounting platform finished in black semi-gloss alkyd

paint.

PUMP

The pump package is offered to allow for single source responsibility of cooling tower equipment. The

size of the pump is determined by two factors:

A) Flow rate

B) Total dynamic head

The customer is responsible for supplying this information. The pumps come complete closed-coupled

with mechanical seals and ODP, 208/230/460V, 3 phase motor. TEFC motors are available.

PUMP MOUNTING

This option is available when the skid mounting option is also selected. A pump is mounted onto the

platform and the suction is pre-piped with PVC Schedule 80 pipe and fittings. This reduces the amount of

field labor involved in installing a cooling tower system.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


SKID MOUNTING ASSEMBLY

The skid mounting assembly is a desirable option that minimized the field labor required to install a Pioneer®

cooling tower. Included with this option is a steel-mounting platform finished in black semi-gloss alkyd

paint, with the cooling tower and blower assembled and mounted to the platform. Guy Wires are included

and assembled to stabilize the tower onto the platform. Additional options can readily be mounted onto the

platform to complete the factory assembly. These options include: blower hood, influent and/or effluent

pumps, pre-piping of the pumps, mounting of a control panel, and pre-wiring of the control panel.

STORAGE TANK

The tank is utilized when extra water capacity is required. Potential applications are for system modulation

when pumping flow rates vary, or for water storage. A hot/cold tank arrangement may be required in those

cases where the process hot water exceeds the maximum allowable inlet water temperature. The cooling

tower would flow more water than the process and the difference would be mixed with the hot water to reduce

its temperature. The tank and optional cover are fabricated of medium density polyethylene. All fittings are

Type 1 PVC.

TWO-SPEED BLOWER MOTOR

Two speed blower motors provide cold-water temperature control by means of airflow modulation, allowing

for design cold-water temperature at minimum operating cost. This is especially desirable for multiple

module applications. When provided with a two-stage thermostat, the motor can be reduced to half speed

when cold water sump temperature approaches design. The motor will shut off when the cold-water

temperature falls below design. Two-speed TEFC motors are provided for single voltage 3-phase operation

only. Single-phase dual voltage motors are not available.

NOTE: a ½ reduction in motor speed corresponds to ½ reduction airflow. At half speed operation,

only 1/8 BHP is consumed.

VIBRATION CUTOUT SWITCH

The vibration cutout switch option is utilized when excessive vibration of the rotating machinery is

undesirable. Excessive vibration can be caused by worn or failed bearings, misalignment and/or wheel

unbalance. This device helps prevent further potential damage by shutting the motor off. It is wired in series

with the motor starter coil and has dry contact rating of 10-ampere capacity at 120 VAC. Delta provides the

vibration cutout switch installed on the blower when ordered as a component of a new cooling tower or on a

replacement blower assembly.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


Delta Cooling Towers, Inc.

Pioneer ! Forced Draft Cooling

Towers

Installation, Operation and Maintenance

Manual

"


Table of Contents

Delta Cooling Towers Principle of Cooling Towers………………..………………1

Cooling Tower Terms & Definitions…………………….1

Installation Safety Procedures…..………………………………….……. 2

Location of the Cooling Tower……..…………………… 2

Hoisting………………………….……..………...…………….. 2

Cooling Tower Installation………………………………….2

Cold Weather Protection…………………………………….3

Piping and Tower Connections………………………….. 4

Duct to Blower Housing Installation……………………. 4

PVC Solvent Cementing Instructions…………………… 5

Operation V-Belt Alignment and Tensioning…..………..…….…… 5

Initial Start-up……..……………..…………………………….5

Operating Design Condition Checklist……………….….6

Maintenance Water Treatment……………..…..………..…….….……… 6

Disassembly and Cleaning……..………………………….. 7

Preventative Maintenance Checklist….……………..…. 8

Recommended Replacement Parts….………………..…8

Important: Delta’s cooling towers have been designed to provide trouble-free service over an extended period of time. To obtain

the design performance, it is necessary that the cooling tower be installed, operated and maintained as prescribed in

these instructions.

Only persons possessing the skill and experience described herein should attempt to install this equipment. Prior to

installation, these instructions should be read carefully by the person who is to install the cooling tower to be certain

that its installation, operation and maintenance are thoroughly understood.

Questions regarding the installation, operation or maintenance of this equipment should be directed to Delta Cooling

Towers, Inc., Rockaway, New Jersey, (Telephone: 973/586-2201).

Step-by-step instructions contained in this brochure are based on normal installation conditions only. Abnormal or

unusual combinations of field conditions should be brought to the attention of Delta Cooling Towers or its

representative prior to installation of the equipment. The information contained herein is subject to change without

notice in the interest of product improvement.

Rev. 02-17-04


Delta Cooling Towers, Inc.

Principle of Cooling Towers

All Cooling Towers operate on the principle

of removing heat from water by evaporating

a small portion of the water that is

recirculated through the unit.

The heat that is removed is called the

latent heat of vaporization.

Each one pound of water that is

evaporated removes approximately 1,000

BTU's in the form of latent heat.

Cooling Tower Terms and

Definitions

BTU - A BTU is the heat energy required to

raise the temperature of one pound of water

one degree Fahrenheit in the range from

32° F. to 212° F.

Cooling Range - The difference in

temperature between the hot water entering

the tower and the cold water leaving the

tower is the cooling range.

Approach - The difference between the

temperature of the cold water leaving the

tower and the wet-bulb temperature of the

air is known as the approach. The approach

fixes the operating temperature of the tower

and is a most important parameter in

determining both tower size and cost.

Drift - The water entrained in the air flow

and discharged to the atmosphere. Drift loss

does not include water lost by evaporation.

Proper tower design and operation can

minimize drift loss.

Heat Load - The amount of heat to be

removed from the circulating water through

the tower. Heat load is equal to water

circulation rate (gpm) times the cooling

range times 500 and is expressed in BTU/hr.

Heat load is also an important parameter in

determining tower size and cost.

1

Ton - An evaporative cooling ton is 15,000

BTU's per hour.

Wet-Bulb Temperature - The lowest

temperature that water theoretically can

reach by evaporation. Wet-Bulb

Temperature is an extremely important

parameter in tower

selection and design and should be

measured by a psychrometer.

Pumping Head - The pressure required to

pump the water from the tower basin,

through the entire system and return to the

top of the tower.

Make-Up - The amount of water required

to replace normal losses caused by bleedoff,

drift, and evaporation.

Bleed Off (Blowdown) - The circulating

water in the tower which is discharged to

waste to help keep the dissolved solids

concentrating in the water below a

maximum allowable limit. As a result of

evaporation, dissolved solids concentration

will continually increase unless reduced by

bleed off.


Installation of Your Pioneer® Cooling Tower

Safety Procedures

CAUTION:

Observe safety procedures during

installation and whenever construction is

under way.

!" Always disconnect & lock out main

power supply before working on motors and

other electrical equipment.

!" Stand clear of rotating equipment

during start-up.

!" Before start-up replace all guards

removed during installation, that protect

pinch areas of V-belts, sheaves and other

rotating equipment.

!" Avoid contact with open flame or heat

source that could cause combustion.

Observe recommended safety precautions

whenever construction involving welding, a

cutting torch, a blowtorch or any other such

equipment is under way within the

immediate area.

How to Prevent Reverse

Siphoning:

Reverse siphoning is a back flow of nonpotable,

recirculating water into a potable

water system which can occur through the

make-up float valve assembly located in the

water reservoir of a cooling tower.

Should the valve malfunction, blockage

of the overflow or outlet lines would cause a

high water level in the reservoir, causing

the make-up water pressure to drop below

atmospheric pressure creating a vacuum at

the make-up inlet.

To prevent reverse siphoning, install a

check valve in the water make-up supply

line to the cooling tower.

NOTE: Do not cap the overflow connection.

Location of the Pioneer ®

Cooling Tower

Proper location of the cooling tower is

essential to its satisfactory operation. The

following are recommendations for

selecting a cooling tower location. Consult

the factory or our representatives for

additional assistance in selecting equipment

and equipment locations.

!" Select an open site having an

unobstructed air supply and free air

motion.

!" If the site is adjacent to a wall or other

structure that blocks prevailing winds, install

the cooling tower so the top discharge is

slightly higher than the structure. Locate

blower at the farthest point from the

structure, facing the direction of the

prevailing winds.

!" Gravity drain to an indoor storage

Sump requires proper head differential and

pipe design considerations. Allowance must

be given based on flow, pipe size, piping

layout and distance cooling tower is located

from the indoor storage sump. (See chart

page 3)

!" Should it be necessary to locate the

cooling tower near walls, within enclosures,

or indoors, choose a location that will not

restrict airflow. Do not install the cooling

tower in a well or below the level of an

obstruction that might impede air discharge,

cause short circuit of air flow, or result in

recirculation of the discharge air back into

the blowers.

!" Do not locate the cooling tower near

heat-generating equipment, exhaust vents

or pipes which could interfere with the

temperature of inlet air and raise the

ambient wet-bulb temperature to the

cooling tower.

!" Do not install a canopy or roof of any

kind over the cooling tower that would

deflect discharge air back down around the

cooling tower and cause recirculation of the

discharge air back into the blowers.

Hoisting

Cooling Tower

For roof mounted installations, it is

recommended that a hoist using two or

more safety slings and spreader bars, as

shown in the illustration, be used-to lift the

cooling tower onto the building.

Secure the safety slings completely around

and under the cooling tower. Provide

padding to protect the edges of the

polyethylene shell at points of sling contact.

The slings should be secured in a girdle

fashion for a double secure point of lift.

Slings should be brought up snug around

the tower before lifting onto the building.

NOTE: Do not use guy wire U-bolts for

hoisting.

Blower Assembly

The blower assembly should be hoisted

separately onto the building, prior to the

removal of the shipping skid, in the same

manner as the cooling tower.

Note: Do not use blower support frame for

hoisting.

Any questions regarding hoisting for roof

mounted installations should be directed to

Delta.

Cooling Tower Installation

Delta cooling towers have been designed to

provide maximum performance, long life

and trouble-free service. To assure optimum

performance, the following

recommendations should be followed as

closely as possible.

Positioning the Tower

The cooling tower should be installed on a

continuous firm, smooth and level concrete,

steel or wood foundation.

Note: The tower must be anchored to the

foundation with ¼” guy wires using the four

U-bolts provided at the top of the cooling

tower shell. Hand tightening of guy wires is

sufficient. Do not over-tension.

Spacing for piping and service access should

be considered when positioning the cooling

tower. Also to insure an adequate positive

suction head, the pump should be located

below the bottom of the cooling tower

sump.

Indoor installation

Typically, cooling towers are placed outside,

either on the roof or adjacent to a building.

If the situation dictates indoor installation,

make sure there is ample fresh air available

around the blower inlets of the tower.

Restricted amounts of fresh air will lead to

poor tower performance. It is also

necessary to attach a duct to the tower

discharge to convey the hot, humid air to

the outside. All ducting should be

independently supported and be kept as

short and straight as possible. The duct size

must not be smaller than the inlet and


discharge openings. Blowers may require

adjustment to accommodate ducting for

indoor installation. Consult the factory for

the recommended motor and drive selection

when duct exterior static pressure (ESP) is

1/8” W.C. or greater. It is recommended

that the inlet and discharge ducting be

screened to prevent foreign objects from

entering. Should prevailing winds blow into

a horizontal discharge, it is recommended

that a suitable windbreak be installed

several feet away.

Cold Weather Protection

The cooling tower may require protection

against freezing at light heat loads when the

wet-bulb temperature is under 32�F, or

during shutdown when the temperature

drops below 32�F.

The following methods are

recommended for use with Delta cooling

towers for protection during cold weather

conditions. Recommended equipment is

optional and may be ordered from the

factory. Consult the factory for further

information on which equipment to choose

for your specific application.

Separate Indoor Sump

This method is a virtually foolproof antifreeze

protection system with the added

advantage of minimum maintenance. The

indoor sump tank should be large enough to

fill the entire recirculation system without

danger of pump cavitation. As a general

rule, the tank should be sized to hold three

times the rate of circulation in gallons per

minute (gpm).

The tank should be provided with

properly sized overflow, makeup, drain and

suction connections. When a separate sump

tank is ordered with a cooling tower, the

water makeup valve assembly and the

overflow and drain connections are installed

in the indoor sump only. A bottom outlet

can be provided for gravity drain to indoor

sump tank installations.

When a sump tank is used, the cooling

tower should be located high enough above

it to allow free cold water gravity drain, as

the chart below outlines.

Gravity Drain

Outlet Size Selection Chart

Outlet Size (inches)

2 3 4 6

Head Feet GPM

0.5 20 50 75 165

1 25 65 95 215

2 35 90 135 305

3 40 110 165 370

4 47 125 190 430

5 53 140 215 475

6 57 155 235 525

7 62 165 250 565

8 66 180 270 600

9 70 190 285 645

10 74 200 300 675

12 81 220 325 715

15 90 245 365 825

Notes: The above gpm flow rates, for the

outlet sizes shown, are calculated for cold

water gravity drain through piping designed

for direct and short horizontal runs before

dropping vertically to the indoor sump tank,

See illustration on page 6.

3

Long distance horizontal pipe runs, as well

as excessive turns, may cause pressure

losses that prevent free gravity flow through

the outlet sizes shown. Consult Delta for

further information.

Electric Immersion Heater

Cooling towers ordered with anti-freeze

systems are shipped with a protective seat

secured under the immersion heater

element that is to remain in place during

operation to protect the polyethylene shell

from direct contact with the heater element.

Note: This protective seat is not a shipping

brace and must not be removed.


Thermostatic On-Off Control

A thermostatically controlled blower for onoff

operation should be considered as an

energy-saving feature during winter

operation. The thermostatic control can be

field set to insure automatic blower shutdown

when cold water drops below design

temperature, as well as blower start-up

when cold water rises to design

temperature. A thermostatic control

provides excellent cooling tower anti-freeze

protection while reducing operating costs

through out cold weather operation.

PVC Distribution system

To prevent damage to the PVC distribution

system during cold weather shut-down,

install an automatic or manual drain line

from the hot water inlet piping as close to

the cooling tower inlet as possible. Locate

this drain line to allow the water to drain

either to waste or to an indoor storage tank.

This precaution will prevent water from

being trapped and possibly freezing inside

the distribution system.

Piping

When the cooling tower is located outdoors,

adequate measures including the use of

heat tracing tape and insulation should be

considered to protect outdoor water lines

from freezing.

Piping and Tower

Connections

!" Piping should be adequately sized

according to accepted standard practices.

Refer to cooling tower drawings for size and

types of cooling tower connections

furnished as standard.

!" On multiple tower installations, pipe

sizing should balance pressure drops to

provide equal inlet pressures. Equalizing

fittings can be provided in cooling tower

sumps and are available as an option from

the factory. Each unit should be valved

separately to allow for flow balance or

isolation from service.

!" All supply and return piping must be

independently supported. See page 5 for

instructions for the preparation and

cementing of internal and external piping.

!" An inlet pressure gauge should be

installed immediately before the cooling

tower inlet connection. See Operating

Design Condition Checklist page 6, and

illustration page 3.

!" The makeup connection is provided

with a float valve and ball assembly for

proper water level control.

!" The overflow connection includes an

elbow with extension pipe that drops below

the water level in the tower sump.

Note: Never block overflow connection.

Water should be allowed to flow freely

without obstruction. See how to prevent

reverse siphoning page 2.

!" The outlet connections for pump

suction applications are provided with a

vortex breaker.

Note: For gravity flow applications, a vortex

breaker is not required or provided. A vent

pipe or bleed valve should be installed at

the highest elbow of the piping system,

to prevent air locks and insure free flow of

water. Air locks can cause gravity flow

restriction resulting in excessive water

accumulation and eventual overflow of the

cooling tower.

!" The outlet, makeup and overflow

connections are notched at the outer ridge

and should be held in position with the

notch at 12 o’clock. This is to insure proper

position of the vortex breaker, float valve,

assembly and overflow extension which are

internal and not visible from the exterior of

the cooling tower.

!" The inlet fitting of models DT-10

through DT-40 is notched in the same

manner as described above to insure proper

spray nozzle position.

!" PVC bulkhead connections must be

held steady and in their factory-installed

positions when the connecting piping is

being installed.

!" When threading pipe to the bulkhead

fittings, do not allow fittings to turn.

Turning can loosen the locknut or squeeze

the gasket out of position and may cause

leaks. PVC bulkhead fittings should be

tightened with a chain wrench so that the

gaskets sit property between the cooling

tower shell and the fitting. Do not over

tighten. A bulkhead fitting that is too tight

or too loose can cause the gasket to crimp

or squeeze away from the locknut, causing

leaks around these connections.

Duct To Blower Housing

Installation

!" To install the cooling tower air duct to

the blower housing, place the lip of the duct

over the lip of the blower housing as shown.

With seven screws supplied, fasten duct to

housing using two screws on each side and

three on the bottom.

On models DT-10 through DT-25, install the

duct sides outside the blower housing.

On all other models, install the duct sides

inside the blower housing.

Install bottom of the duct to outside of the

blower housing on all models.

!" Seal off air leaks around the duct with

duct tape.

Note: the blower support frame must be

bolted to the foundation. The assembly is

furnished with pre-drilled bolt holes.

Shimming may be required for perfect fit.

!" Damage to painted surface of blower

housing during installation must be repaired

immediately to prevent corrosion.


PVC Solvent Cementing

Instructions

The following procedure is recommended

for the preparation and cementing of

internal and external piping for Delta

cooling towers:

!"Cut ends of pipe square using a hand

saw and miter box. Tube cutters with

wheels designed for use with PVC are

acceptable, providing they do not leave a

raised bead on the outside diameter of the

pipe.

!" Use a chamfering tool or file to put a

10° to 15° chamfer on the end of the pipe.

Lightly sand the area to be cemented to

remove gloss. Using a clean rag, wipe pipe

surface and fitting socket to remove dirt,

moisture and grease, Acetone or similar

solvent is recommended for cleaning.

!" Check “dry fit” of pipe and fitting by

inserting the pipe at least 1/3 of the way

into the fitting. Position pipe and fitting to

assure alignment. Pipe and fitting should be

at same temperature condition.

V-belt Alignment and

Tensioning

Proper belt tension is the most

important factor in the successful operation

of a V-belt drive. The belt tension should be

checked frequently during the first 24 hours

of operation and then periodically on a

maintenance schedule. Loose belts cause

slippage which reduces air flow and can

adversely affect belt life and cooling tower

performance.

Using a clean, natural bristle brush

about ½ and size of the pipe diameter,

apply P-70 primer to the fitting socket,

Apply primer with a scrubbing motion until

the surface is penetrated. Primer should

never be applied with a rag. Repeated

applications may be necessary to achieve

the desired dissolving action. In the same

manner, apply primer to the pipe surface

equal to the depth of the fitting socket,

making sure the surface is well penetrated.

Reapply primer to the fitting socket to make

sure it is still wet.

!" While both surfaces are still wet with

primer, use a clean brush to apply a liberal

coat of solvent cement to the male end of

the pipe. The amount should be more than

sufficient to fill any gap.

Operation of Your Pioneer ® Cooling Tower.

The following belt tensioning procedure is

recommended:

!" Check that the driver and driven

sheaves are in alignment by placing a

straight edge across the sheaves at four

contact points as shown. If realignment is

required, loosen the motor sheave bushing

screws and align the sheaves.

!" To tension the belts, adjust the motor

base so that the belt will deflect about ½”

when moderate pressure is applied to the

5

!" While both surfaces are still wet with

solvent cement, insert the pipe into the

socket with a quarter-turn twisting motion.

The pipe must be inserted the full length of

the socket.

The application of solvent cement to

pipe and fitting, and the insertion of the

pipe into the fitting, should be completed in

less than one minute. If necessary, two

persons should apply solvent cement to the

pipe and fitting simultaneously.

!" Hold the joint together for

approximately 30 seconds until both

surfaces are firmly gripped.

After assembly, a properly made joint will

usually show a bead of cement around its

entire perimeter. This should be brushed

off.

It is recommended that the joint be

allowed to cure for 24 ours before pressure

testing.

belt midway between the sheaves as shown

in the illustration.

Note: Excessive belt tension can shorten

belt and bearing life. Loose belts or

misaligned sheaves can cause unseating

and breakage of belts. Replacement of

multiple belt systems should be made in

matched sets.

Initial Start-Up

!" Clean accumulated debris from inside

shell bottom.

!" Check that blower fan motor is

properly wired for counter-clockwise (ccw)

rotation of the blower wheel as viewed from

the sheave side of the blower assembly.

Reverse leads will cause incorrect rotation

and inhibit required airflow.

!" Fan bearings should be re-lubricated if

tower has been in the field three months or

longer prior to start-up.

!" Check sheave alignment and belt

tension. See illustration.

!" Fill cold water sump to overflow level.


The standard make-up valve assembly

is shipped as shown with the plastic float

ball against the tower side to prevent

damage. To set the ball for proper

operation, loosen the thumb screw on the

fulcrum arm and rotate until a 10” operating

level is obtained (measured from the tower

bottom vertically upward to the midpoint of

the float ball). It is recommended that a

shut-off valve be installed in the make-up

line. See how to prevent reverse siphoning

page 2.

!" Water recirculation pump(s) should be

primed and all piping below the tower

sump filled with water. Check pump for

proper shaft rotation.

!" Start water recirculation pump(s) and

adjust flow to produce proper inlet spray

pressure. An inlet pressure gauge should be

installed immediately before the cooling

tower inlet connection.

Water Treatment

The Delta cooling tower shell and internal

components are fabricated of corrosionresistant

plastics and are resistant to water

treatment chemicals including common

fungicides and bactericides.

Follow appropriate water treatment

practices as required and take frequent

sample tests to avoid possible water

contamination. We also recommend water

treatment maintenance as a measure of

protection for the environment in the

vicinity of any cooling tower or evaporative

condenser equipment.

!" Check spray pattern from nozzle(s) to

be sure there is no clogging, Remove drift

eliminators for nozzle inspection, then

return to proper position.

!" Start fan motor and check amperage

and voltage against motor nameplate data.

!" After 24 hours of operation, check belt

tension and adjust if necessary. See page 5.

Operating Design

Condition Checklist

For proper operation and maximum

efficiency of the cooling tower, the following

operating design conditions are essential:

!" The flow rate of the cooling tower

must be as close to the design gpm as

possible. The distribution system, including

spray nozzles, are provided for the design

flow condition. Under-pumping or overpumping

will cause the cooling tower to

perform inefficiently.

!" Design pressure at the inlet

connection must be maintained for proper

water distribution. If the pressure is less or

greater than the design, proper water

dispersion over the internal wet decking will

be impaired. If inlet pressure is low, water

spray will not cover the entire wet decking

surface. This causes channeling of air and

does not make maximum use of the heat

transfer media. High inlet pressures will

cause the water to over-spray the wet

decking media, hit the internal side walls of

the tower shell and drop in a vertical flow

along the shell walls without the opportunity

for maximum water / air contact through

Maintenance of Your Pioneer ® Cooling Tower.

To determine the appropriate water

treatment practices for your particular

application, it is suggested that you contact

a water treatment firm for their

recommendation. A list of water treatment

firms is available for your reference.

It is not necessarily complete nor do we

recommend a specific firm. The list will be

mailed to you on request.

Bleed off is also important to water quality.

Evaporation of the recirculated water does

not remove the dissolved solids that are

present in the water. Without bleed off, the

continual buildup of these solids will impair

the proper functioning of the piping and

other equipment in the system.

6

the heat transfer media. Excessive high

spray pressure may also cause wet decking

fatigue and damage. The nozzles furnished

with standard cooling towers are sized for 3

gpm/ton, requiring 10 psi inlet pressure for

models

DT-50 though DT-100, and 7 psi inlet

pressure for models DT- 10 through DT- 40.

This standard may vary when the design

flow is less or greater than 3 gpm/ ton.

Alternate orifice nozzles will be provided in

order to maintain the proper inlet pressure

requirement. Correct flow rates and inlet

pressures should be determined prior to

completion of system installation.

!" Blower motors must be properly

wired for counter-clockwise (ccw) rotation

of the blower wheel as viewed from the

sheave side of the blower assembly.

Reversed leads will cause incorrect rotation

and inhibit required air distribution.

Note: The blower must always operate with

water circulating through the cooling tower

to prevent motor overload.

!" The maximum operating inlet water

temperature should not exceed 140° F.

Nozzle Inlet

Model Size Pressure

!T-50 3 gpm/ 10 psi

through ton

!T -100

!T-10 3 gpm/ 7 psi

through ton

!T-40

A bleed line can be connected in any

part of the system with routing to the

sewer. Normally, it is most desirable to

make this connection in the hot water line

at the cooling tower. A petcock type valve,

installed in the bleed line for proper control

is recommended. The required amount of

bleed-off water must be substituted with

properly controlled amounts of make-up

water.


Disassembly and Cleaning

For Pioneer ® Models DT-10

through DT-40

!" Remove the drift eliminator from the

cooling tower. It is flexible enough to push

the outer perimeter toward the center and

lift over the top lip of the cooling tower

shell. Begin at one point and work carefully

around the entire circumference of the drift

eliminator.

!" Models DT-30 and DT-40 are designed

without a top lip so the drift eliminator can

be easily lifted up and away from the shell.

!" Remove the water distribution spray

system from inside the cooling tower. The

spray system is installed across the top of

the tower directly under the drift eliminator.

Disconnect locknuts at each end of system

and remove piping by elongating top of

tower shell slightly.

!" Remove the wet decking from the

cooling tower shell using the plastic hand

straps attached for lifting. The wet decking

has a smaller diameter than the drift

eliminator and will lift easily out of the shell

once the distribution spray system is

removed.

!" When the internal components are

removed the empty shell can be cleaned

and inspected, It is recommended that the

water distribution laterals and nozzles be

cleaned and flushed before reassembly.

!" To reassemble components, reverse

the above procedure.

Before installing the drift eliminator,

pump water through the distribution system

to be sure there is a good spray pattern and

proper water distribution over the wet

decking surface.

7

For Pioneer ® Models T-50 through

T-100

Same procedure as above except:

!"These models are designed so the drift

eliminator can be easily lifted up and away

from the cooling tower shell. The spray

tree sections of the water distribution

system are threaded to a coupling and

unscrew easily. Hold and turn the entire

riser below the lateral and nozzles, then

carefully remove the whole assembly.

!"The wet decking can now be easily

removed using the plastic hand straps

attached for lifting.

Drift Eliminator

Distribution Spray

System

Wet Decking

Blower Housing

Tower Shell


Preventative Maintenance

Checklist

Procedure Monthly Every 3 Months Every 6 Months

Inspect general condition of cooling tower. (it is

never necessary to scrape or paint a Delta Cooling

Tower.)

#"

Check water level in cold water basin.

Adjust if necessary.

Check float ball and make-up valve for proper

operation.

Check line voltage, motor amperage and fan wheel

rpm.

Check belt tension and general condition of V-belts.

Clean outside of blower motor to help assure proper

cooling.

Lubricate blower bearings and fan motor using a low

pressure grease gun.

Check blower wheel for dirt buildup which can cause

unbalance and vibration

Clean and flush cold water basin.

Lubricate motor base and adjusting screw.

Pioneer ®

Recommended

Replacement Parts

To avoid costly cooling tower downtime, the

following replacement parts should be

carried in inventory at the installation site:

!" V-belts

!" Blower bearings

!" Make-up float, or complete make-up

valve assembly

!" Blower shaft

!" Blower motor

!" Or, a complete blower assembly

including bearings, shaft, sheaves, Vbelts

and motor.

#"

#"

#"

#"

When ordering, include model number and

serial number of the cooling tower as it

appears on the tower nameplate.

Under normal conditions, shipment of

factory replacement parts is made within

one day after the order is received. Spare

pumps and pump parts s well as control

panel components, such as fuses and

heaters for magnetic starters, are also

available.

8

#"

#"

#"

#"

#"


DELTA

Cooling Towers, Inc.

PARAGON ® COOLING TOWERS

Paragon® cooling towers

are induced draft counter flow

design cooling towers with

single module capacities from

100 to 250 cooling tons. These

towers are a unitary seamless

engineered plastic design that

Delta has been manufacturing

since 1981 providing long-term

durability and trouble-free

operation.

Induced Draft, Counter Flow Design

100 - 250 Ton Single Modules

STANDARD FEATURES:

�� Seamless Engineered Plastic (HPDE) Shell

�� Corrosion Proof Construction

�� Direct Drive Fan System with Totally Enclosed Motor.

�� Factory Assembled for Simple Installation

�� 15 Year Shell Warranty

�� Low Pressure Drop Self Propelled PVC Water Distribution System

�� High Efficiency PVC Fill

�� Made in the USA

Compare the value Delta Cooling Towers offer against the

value of other comparable units. You will find the benefits we

can provide are unique and superior:

�� Energy Efficiency - low fan HP from optimized cooling

counterflow design, low pump head.

�� Non-Corrosive Materials of Construction - impervious to

chemicals, acids, and salts.

�� Cost Less to Maintain - will not rust, chip, or ever require painting

for extraordinary tower life.

�� Unique Design - provides unlimited flexibility of modular

operation, future upgrade capablity, and location convenience.

�� One-Piece Construction - strong and long lasting. Shell is

backed by a 15 year warranty.

�� Cost Less to Install - light weight construction reduces rigging

and structural roof support requirements. Maintenance costs and

water treatment chemicals cost are significantly lowered.

OPTIONS AVAILABLE:

�� Mounting Platforms

�� Two Speed Motors

�� Thermostatic On/Off Fan Control Package

�� Anti Freeze Basin Heaters

�� Pump(s)

�� Sump Level Switches

�� Stainless Steel Basket Strainers

�� Control Panels

�� Storage Tanks

134 Clinton Road • Fairfield, NJ 07004 • 973-227-0300 • FAX 973-227-0458 • www.deltacooling.com


DELTA

Cooling Towers, Inc.

CORROSION-

PROOF SHELL

HDPE Plastic

Construction can not

corrode and is backed

by 15 Year Warranty.

LIGHTWEIGHT

AND

HEAVY DUTY

Plastic is lighter than

conventional cooling

towers and average

wall thickness is 5-10

times sheet metal

towers.

LEAK-PROOF

SUMP

Molded as Unitary

(One-Piece)

Structure that has

no joints to leak or

require re-caulking

and sealing.

PARAGON ® COOLING TOWERS




Induced Draft, Counter Flow Design

100 - 250 Ton Single Modules

Delta Cooling Towers

Leader in Non-Corrosive Cooling Tower Technology

134 Clinton Road, P.O. Box 952 • Fairfield, New Jersey 07004-2970

Tel: 973-227-0300 • Fax: 973-227-0458 • 800-BUY-DELTA

E-mail: deltacooling@att.net • Website www.deltacooling.com



• •

WATER DISTRIBUTION SYSTEM

Self-propelled multiple PVC rotating arm system

evenly distributes the water.

DIRECT DRIVE

AIR MOVING

SYSTEM

Totally enclosed cooling

tower motor powers

fiber-reinforced

polypropylene axial

propeller fan.

FILL MATERIAL

High efficiency spiral

wound PVC cellular

design for maximum

cooling.

DRIFT

ELIMINATOR

Polyethylene drift

eliminators prevent

water droplets from

leaving the tower.

Model Approximate Weight Dimensions Capacity Fan Motor Sump Capacity

Number Shipping Operating Dia. x Ht. Tons HP Gallons

ΔT-100I 1510 4235 84" x 146" 100 5 330

ΔT-125I 1585 4310 84" x 146" 125 7.5 330

ΔT-150I 1785 5570 95" x 178" 150 7.5 468

ΔT-175I 1925 5810 95" x 178" 175 10 468

ΔT-200I 3170 8440 114" x 210" 200 10 718

ΔT-250I 3365 8640 114" x 210" 250 15 718

The information, recommendations and opinions set forth herein are offered solely for your consideration, inquiry and verification, and are not,

in part or total, to be construed as constituting a warranty or representation for which we assume legal responsibility.


Delta Cooling Towers, Inc.

41 Pine Street

P.O. Box 315

Rockaway, New Jersey 07866-0315

Telephone 973.586.2201

Fax 973.586.2243

www.deltacooling.com

sales@deltacooling.com

PARAGON ® Induced Draft Cooling Tower Specifications

PARAGON ® cooling towers are induced draft counter-flow cooling towers with single

module capacities from 100 to 250 cooling tons. These towers are a unique design that

Delta Cooling Towers has been manufacturing since 1981 and have been very well

received in both commercial and industrial applications. There are three overriding

principles that make PARAGON ® cooling towers an excellent selection.

The towers are corrosion-proof, not corrosion-protected, which is an important

distinction of Delta towers. Cooling towers are outdoor equipment, either on roofs or

sides of buildings, and are subjected to weather extremes continuously. Delta towers

are manufactured in a seamless engineered plastic (HDPE) structural shell which is

corrosion-proof and will not rust, chip, peel, crack or ever need painting or additional

protective coatings. Comparably priced towers are often sheet metal with a galvanized

coating. Zinc galvanizing provides only an interim protection against corrosion. This

galvanizing wears away, often unevenly, exposing sheet metal to the rapid corrosive

environment of cooling tower duty.

The second principle of Delta towers is the engineering that led to a simplicity of design,

translating into reliability and a trouble-free life of the towers. From the seamless

cooling tower shell to the direct drive fan assembly, there are less overall components

and systems within the tower to maintain. The towers are shipped factory complete with

little more installation steps than hooking up the electrical and water. This design

simplicity is recognized in many other industries as a key goal and leads to greater

reliability and owner peace of mind.

Finally, the PARAGON ® induced draft cooling towers are a high efficiency design, which

translates to very low energy costs to operate the towers. The design of the towers and

the proprietary high efficiency fill material lead to this energy efficiency. The minimal

operating costs, a track record of superior reliability and corrosion proof materials of

construction makes the PARAGON ® Induced Draft Cooling Tower the choice for cooling

tower applications over 100 cooling tons.


Delta Cooling Towers, Inc, Induced Draft Cooling Tower Specifications, Page 2 of 5

PART 1 GENERAL

1.1 SCOPE

PARAGON ! INDUCED DRAFT COOLING TOWER

Work included to furnish and install Delta Cooling Tower model !T_____

consisting of all equipment necessary to provide a complete operating system to

remove specified heat load. Cooling towers shall be packaged, factory preassembled

to the fullest extent possible, induced draft, counter flow design

1.2 RELATED WORK

{insert related work document here}

1.3 REFERENCES - STANDARDS

AMCA - Air Moving and Conditioning Association

ASTM - American Society for Testing and Materials

ANSI - American National Standards Institute

ASME - American Society of Mechanical Engineers

1.4 QUALIFICATIONS

The cooling tower shall be manufactured by a company with at least 30 years

experience manufacturer of seamless engineered polyethylene cooling tower

systems.

1.5 WARRANTY

Shell shall be warranted for 15 years and all other equipment shall be warranted

for one year against material and workmanship defects from date of shipment.

1.6 SUBMITTALS

Shop drawings shall be provided and shall include but not be limited to:

A. System dimension

B. Operating and dry weight

C. Details of equipment

D. Mounting and support requirements

E. Descriptions and specifications


Delta Cooling Towers, Inc, Induced Draft Cooling Tower Specifications, Page 3 of 5

PART 2 PRODUCT

The cooling tower specified shall be factory assembled to the fullest extent

possible.

2.1 Induced Draft Cooling Tower, Model !T _____ , ____ tons capacity,

____GPM, ____ " F hot water temperature, ____ "F cold water temperature,

____ "F wet bulb temperature

A. Cooling tower

1. Shell shall be seamless, non-corrosive, hi-impact high density

polyethylene (HDPE) of leak proof design. Conical transition for

motor/fan assembly and 360" louvered air inlet panels around base

of cooling tower integrated for optimum air distribution. The shell

shall exceed 1/4" average thickness. The structural shell shall be

capable of withstanding water temperatures up to 160"F on a continual

basis.

2. Sump shall be integral with cooling tower shell, creating a one-piece

seamless structure.

3. Cooling tower structural shell shall be guaranteed against corrosion

for 15 years.

4. Removable PVC louver located above the integral cold sump for

accessibility to automatic make-up valve and adjustable float.

5. PVC fittings shall be provided for inlet, outlet, overflow, drain and

make up.

6. Outlet fitting for pump suction applications shall be provided with a vortex

breaker.

7. Make up assembly shall be incorporated in the sump of the cooling tower.

It shall be a mechanical valve assembly, adjustable height for varying

operating condition.


Delta Cooling Towers, Inc, Induced Draft Cooling Tower Specifications, Page 4 of 5

The engineered plastic shell is the optimum material for cooling tower construction. The material

is molded into a totally seamless shell which will never leak, unlike conventional cooling towers

which require many panels, joints, seams, seam gaskets, caulking and hundreds of bolts or other

fasteners to maintain the integrity of the product. The Delta structural shell will never rust, chip,

crack or ever need painting or further protective coatings. The structural shell is warranted for

15 years which is much longer than other available cooling towers.

Galvanized steel towers provide only interim corrosion protection. The zinc galvanizing is

designed only to delay corrosion as the zinc wears steadily away. Moderately high temperatures

and various water chemical treatments speed up this leaching of zinc into the water or

atmosphere. With only ounces per square foot of corrosion protection, it is only a matter of

time till corrosion of the underlying sheet steel sets in.

Thin fiberglass panels can also not match the structural integrity of Deltas' seamless engineered

plastic. Over time, if that long, leaks can develop at the joints even with gaskets and caulking

applied. Thin fiberglass when exposed to the wide range of outdoor weather elements is also

subject to delaminating, wicking and overall degradation.

B. Drift eliminator

Shall be non-corrosive polyethylene integral with rotating water distribution

system.

C. Water distribution

Self propelled PVC distribution system incorporating a rotating sprinkler

head and lateral distribution arms with integral drift eliminators. An

access port shall be provided in cooling tower shell at lateral arm

elevation for access to removable end caps for ease of maintenance.

D. Wet decking

Continuously wrapped spiral configuration of lightweight polyvinyl chloride

PVC, bonded for maximum cooling efficiency.

E. Fan assembly

1. Fan propeller shall be adjustable pitch direct drive. Fan blades

shall be constructed of fiberglass reinforced polypropylene with

aluminum silicon alloy hub with stainless steel hardware.

Statically and dynamically balanced prior to shipping.


Delta Cooling Towers, Inc, Induced Draft Cooling Tower Specifications, Page 5 of 5

F. Hardware

PART 3 EXECUTION

2. Fan and motor shall be supported by heavy gauge rolled steel ring.

The fan ring shall be coated with a premium Plasite for corrosion

protection.

3. Motors shall be Direct Drive, Totally Enclosed, Energy Efficient,

1200 RPM, Inverter Rated, with Double Sealed Bearings,

Corrosion Resistant Mill & Chemical Duty Paint and designed for

cooling tower duty.

4. Motor shall be provided with motor manufactures standard

warranty.

5. Fan guard shall be coated steel mesh, 1/2" open area to allow air

to pass through with minimal pressure loss while protecting

personnel from contacting the rotating fan propeller.

All fasteners are 304 stainless steel. Anchor and lifting lugs are

aluminum.

1. GENERAL - INSTALLATION

Installation of equipment shall be in conformance with the manufacturers

recommendations.

2. TESTING

Propeller type fan is attached to the shaft of the motor. The direct drive system

has a twofold benefit. First and foremost, there are no extra bearings, pulleys,

gear reducers or additional shafts to maintain or fail. The second benefit is the

higher efficiency gained by connecting the motor to the motor shaft, there are no

losses due to friction from bearings and gears, thus providing the highest

efficiency available.

A. Contractor shall perform all field testing and final adjustment of cooling tower

equipment in accordance with provision of manufacturer

B. Contractor shall certify that all operation criteria is within normal operating

range as specified by the manufacturer.

C. Should any part of the cooling tower equipment fail to meet any specified

requirement, adjust, repair or replace any and all defects or inoperative parts

immediately with manufacturers recommended parts or procedures.


ANTIFREEZE PACKAGE / RESISTANCE HEATING OPTION

The antifreeze package is supplied to provide protection against freezing of standing water in the cooling

tower sump due to shutdown during winter operation. The option is provided when draining the system

during periods of prolonged shutdown is not feasible, such as during weekends, or when a separate

gravity feed indoor storage tank is not part of the re-circulation system. Resistance heating of the sump

water provides protection, and this package includes the following components:

Immersion Heater:

Capacity sized for service ~ NEMA 4 enclosure

T100i thru T175i 6000 watt – 2.5” thread

T200i thru T250i 9000 watt – 2.5” thread

Thermostat Assembly:

Thermostat is to be set in field. Recommended setting is approximately 38°F.

NEMA 4 enclosure with SPDT switch ~ 30-130°F temperature range ~ 120/277 Volt

with ¾” SCH 80 bulkhead fitting and a ¾” x ½” SCH 40 reducer

Liquid Level Switch Assembly:

NEMA 7 and 9 enclosures are standard on this SPDT level switch. This insures that the

heating element is submerged prior to energizing to prevent immersion heater burn cause

of low water level.

Heater Contactor:

NEMA 1 enclosure is standard. Open style for control panel mounting is available. This

contactor is mounted in the control panel when the panel is purchased from Delta.

PVC bulkhead fittings, for local installation, are included in component prices. Protection of external

piping by heat tracing and insulation is recommended but not included.

ANTIFREEZE PACKAGE / SOLENOID DRAIN VALVE

This option is utilized when freezing of standing water in the cooling tower sump could occur due to system

shutdown during winter operation. An electrically actuated valve will open when the pumps are not operating

and the temperatures approach freezing. The valve can be installed in the sump drain fitting of the tower (at

the factory) or remotely at the piping low point (by others in the field).

Components provided are:

A) Electrically actuated to close, spring to open, 2-way valve, 1” line size, with NEMA 4 enclosure.

B) 1” PVC tee

C) 1” PVC plug

D) Temperature switch with bulkhead fitting

When power is removed the valve automatically reverts to the open position. This feature ensures freeze

protection even during a power outage.

BOTTOM OUTLET

The Bottom Outlet is a convenient option when gravity draining a cooling tower. This minimized the

amount of standing water in the sump of the cooling tower. A 125lb. Flanged fitting is provided.

Provisions must be made in the mounting platform for the fitting. The platform, indoor storage tanks and

other fittings can be provided by Delta.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


CONTROL PANEL

A control panel is required any time there are electrical devices involved in a system. The standard

features of a Delta supplied control panel are:

A) NEMA 3R water tight enclosure

B) Single speed motor starter

C) 110V transformer with fuses

D) Blower operating lights

E) Blower selector switches

F) Terminal strips

G) 208V or 230V or 460V or 575V / 3Ph / 60Hz

Optional items available:

!" Disconnect switch: either fused, unfused or magnetic circuit breaker type.

!" Motor starter fuses or circuit breakers.

!" Additional motor starters, selector switches and lights to interface with existing systems,

remote pumps, etc.

!" Any other NEMA enclosure manufactured.

!" Pre-mounting of control panel and pre-wiring of skid mounted options with Liquid-Tite

conduit or EMT. (Consult factory for add pricing)

Delta also can provide programmable controllers, computer interfacing, telemetry, and any other type of

control system required. Pre-mounting and pre-wiring of the control panel for a system installation are

available. This minimizes the labor required for field installation.

EQUALIZER FITTINGS

This option is desirable for multiple module installations to provide equal liquid levels in the sumps of the

individual modules and allows for the installation of only one (1) water make-up line. Delta provides the

bulkhead fittings installed in the cooling towers to provide for gravity flow from one tower sump to

another. The equalizer connection is not for full flow transfer (ex: pumping from one unit to another).

The connecting piping should be field installed and is the responsibility of others.

FAN ASSEMBLY COATING

The standard fan coating provided for the cooling tower fan ring and guards is a cross linked epoxyphenolic

with an alkaline curing agent and formulated to withstand a wide range of chemicals and for

ease of handling. This coating provides excellent chemical resistance to a wide range of acids, alkalies,

solvent and water solutions. When dry, the coating can withstand up to 400°F temperature. The fan ring

and guard steel surfaces are sand blasted and a primer is applied prior to the final application.

FLANGED ADAPTORS

Standard Paragon® inlet and outlet fittings are PVC socket connections. This option provides 125lb

Schedule 80 PVC flanged connection at approximately 6” projection minimum from the cooling tower.

Gaskets and hardware are not provided by Delta and should be provided by others with the piping

companion flange.

HIGH SUMP LEVEL SWITCH

The hump sump level switch option is utilized when a potential overflow must be avoided.

Switch elevation is set below the point when the water in the sump will overflow onto the ground.

The switch can be used to illuminate a light, shut off the influent feed pump or initiate some other device

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


or alarm. This package consists of a NEMA 7 and 9 liquid level switch mounted in a PVC bulkhead

fitting assembly with a 2” x 1” reducer bushing.

LADDER

The ladder assembly facilitates access to the upper section of the cooling tower for inspection and

maintenance of the water distribution system and fan assembly as required. The assembly is fabricated of

aluminum for lightweight installation and has skid resistant rungs and landing platform. The landing

platform is specifically placed to maximize accessibility to the man-way located in the conical section of

the tower for easy access and servicing of components. The ladder conforms to all OSHA requirements.

In some cases the cage assembly may be required. The unit is attached to the tower via (4) bolted

connections and two base mounting bolts.

MOTOR SPACE HEATER

Fan Motor Space Heaters are recommended for installations where temperature variations can cause

excessive condensation within the motor. The Space Heater controls can be incorporated in our Control

Panel and would be designed for automatic and manual operation. While the motor is operating, the

heater remains off. When the motor shuts down, the heater is automatically energized during the off

cycle. The Control Panel would be designed with manual on/off control for intermittent cycles of

operation. Heaters are available for 115, 230, 460, or 550 volts, 3 phase, 60-cycle operation.

OUTLET STRAINER BASKET

This option is desirable to prevent debris that may have entered the cooling tower sump from getting into

the pump, or the rest of the cooling water system. This option is recommended to minimize particle size

that could foul chillers, heat exchangers, compressors or the cooling tower distribution laterals.

A vortex breaker pipe, which is provided as standard on pump suction applications, is included to

maximize the inlet area and prevent cavitation. The strainer is made from a vortex breaker pipe

surrounded by 3/16” #2 PVC coated mesh screen. Finer mesh screens can be overlaid to minimize

particle size. Consult Delta for add prices and availability.

PLATFORM

The platform is beneficial in installations where a flat and level surface is not available for mounting

Delta’s cooling towers. The steel platform is also utilized for replacement installations where only “I”

beams, or other forms of support exist. This steel platform is finished in a black air-dried phenolic paint.

The platform is shipped in two separate pieces, for transportation purposes, and must be supported in the

field by others. An optional walkway can be supplied to allow for accessing the cooling tower sump,

should the platform be elevated.

PUMP

The pump package is offered to allow for single source responsibility of cooling tower equipment. The

size of the pump is determined by two factors:

A) Flow rate

B) Total dynamic head

The customer is responsible for supplying this information. The pumps come complete closed-coupled

with mechanical seals and ODP, 208/230/460V, 3 phase motor. TEFC motors are available.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


SAFETY CAGE

Complementary to the ladder option. Extends above the ladder-landing platform for extra protection

while accessing the top of the cooling tower. The safety cage is assembled to the ladder at the factory for

ease of installation. This assembly is attached directly to the cooling tower shell during installation.

The safety cage may or may not be required depending on OSHA specifications. The cage assembly is

manufactured of the same type of aluminum as the ladder.

STORAGE TANK

The tank is utilized when extra water capacity is required. Potential applications are for system modulation

when pumping flow rates vary, or for water storage. A hot/cold tank arrangement may be required in those

cases where the process hot water exceeds the maximum allowable inlet water temperature. The cooling

tower would flow more water than the process and the difference would be mixed with the hot water to reduce

its temperature. The tank and optional cover are fabricated of medium density polyethylene. All fittings are

Type 1 PVC.

THERMOSTATS – Single Stage and Two-Stage

The fan thermostat is important to minimize operating costs. The thermostat senses water temperature

and controls fan operation during cold weather service. When cold-water temperature drops below

design, the fan will shut off saving motor hp operating costs.

A single stage thermostat controls the fan on/off and is provided with a standard single speed

motors.

A two-stage thermostat is required for two speed motor operation and controls the fan from ‘on’

to ‘half speed’ and then to ‘off’. At half speed operation the motor operates at only ¼ full load

BHP. Two stage thermostats must be wired to Delta specifications.

As the cold-water temperature rises and approaches the design temperature, the thermostat signals the fan

to start in order to maintain the cold water design temperature. The thermostat has a 5°F differential in its

operating range of 30°F to 130°F. The contacts are SPDT and have a 15 Amp UL rating. They are

complete with NEMA 4 enclosures suitable for outdoor mounting. The thermostat can be provided loose,

or installed in the cooling tower sump, or an indoor storage tank. When the thermostat is supplied with a

cooling tower or storage tank provided by Delta, the package includes installation with a ¾” Schedule 80

PVC bulkhead fitting and a ¾” x ½” Schedule 40 PVC reducer bushing. Thermostat operating range

must be set in the field. Recommended setting is approximately 70°F to 72°F, but will vary depending on

the application and the installation location.

TWO-SPEED FAN MOTOR

Two speed fan motors provide cold-water temperature control by means of airflow modulation, allowing for

design cold-water temperature at minimum operating cost. When provided with a two-stage thermostat, the

motor can be reduced to half speed when cold water sump temperature approaches design. The motor will

shut off when the cold-water temperature falls below design. Two-speed TEFC motors are provided for

single voltage 3-phase operation only. Single-phase dual voltage motors are not available. NOTE: a ½

reduction in motor speed corresponds to ½ reduction airflow. At half speed operation, only 1/8 BHP is

consumed.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


VIBRATION CUTOUT SWITCH

The vibration cutout switch option is utilized to shut down the rotating mechanical fans in the event of

excessive vibration. This device helps prevent further potential damage by shutting the motor off. It is wired

in series with the motor starter coil and has dry contact rating of 10-ampere capacity at 120 VAC.

Delta provides the vibration cutout switch installed on the blower when ordered as a component of a new

cooling tower or on a replacement blower assembly.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


Delta Cooling Towers, Inc.

Paragon ! Induced Draft

Cooling Tower!

!

Installation, Operation and

Maintenance Manual


Table of Contents

Delta Cooling Towers Principle of Cooling Towers………………..……………. 1

Cooling Tower Terms and Definitions…………………… 1

Water Treatment……..………………………….……….. 1

General Information Safety………………..………………………………….… 2

Approximate Weights………………..…………………… 2

Dimensions & Other Physical Data……..………...……… 2

Handling & Installation On-Site Inspection………………..………..…….….……. 2

Off Loading……..……………..………………………….. 2

Handling & Off Loading - Fig. 1…………………………. 2

Uprighting & Lifting of Cooling Tower……..………...….. 3

Anchoring……..……….…………………………..……… 3

Water Distribution System/ Tower InternalsPre-Check…... 3

Water Distribution Sprinkler System – Fig 2……………… 3

Lifting & Installation of the Fan Assembly……………….. 4

Electrical Wiring of Fan Motor & Accessories……..…….. 4

Location, Piping & Connections……..…….……….…….. 4

PVC Solvent Cementing Instructions………………...…… 5

Operation and Maintenance Safety in Operation of the Fan..…..………..…….….……. 5

Water Distribution System……..…………………………. 5

Sprinkler Head Maintenance……….……………..………. 6

Optional Sray Nozzle Distribution System………………. 6

Direct Drive Fan Assembly ……….………………..…...… 6

Start-up Instructions………………………………..…….. 7

Water Level in Tower Sump…..……..…….……….…….. 7

Cold Weather Operation…………...………………...…… 7

Trouble-Shooting Guide.…………...……………….….… 9

Motor Trouble-Shooting Guide…………...………....…… 11

Other Information Cooling Tower Optional Accessories..…..…...….….……. 12

Recommended Replacement Parts……..…………………. 12

Appendices (Reference Documents)……………..……….. 12

Preventative Maintenance Checklist….……………….….. 13

Warranty…………..………………………………..…….. 14

Important: Delta’s cooling towers have been designed to provide trouble-free service over an extended period of time.

To obtain the design performance, it is necessary that the cooling tower be installed, operated and

maintained as prescribed in these instructions.

Only persons possessing the skill and experience described herein should attempt to install this equipment.

Prior to installation, these instructions should be read carefully by the person who is to install the

cooling tower to be certain that its installation, operation and maintenance are thoroughly understood.

Questions regarding the installation, operation or maintenance of this equipment should be directed to Delta

Cooling Towers, Inc., Rockaway, New Jersey, (Telephone: 973/586-2201).

Step-by-step instructions contained in this brochure are based on normal installation conditions only.

Abnormal or unusual combinations of field conditions should be brought to the attention of Delta Cooling

Towers or its representative prior to installation of the equipment. The information contained herein is

subject to change without notice in the interest of product improvement.

Rev. 1-2-2008


Delta Cooling Towers

Principle of Cooling Towers

All Cooling Towers operate on the

principle of removing heat from water

by evaporating a small portion of the

water that is recirculated through the

unit.

The heat that is removed is called the

latent heat of vaporization.

Each one pound of water that is

evaporated removes approximately

1,000 BTU's in the form of latent heat.

Cooling Tower Terms and

Definitions

BTU - A BTU is the heat energy

required to raise the temperature of one

pound of water one degree Fahrenheit

in the range from 32° F. to 212° F.

Cooling Range - The difference in

temperature between the hot water

entering the tower and the cold water

leaving the tower is the cooling range.

Approach - The difference between the

temperature of the cold water leaving

the tower and the wet-bulb temperature

of the air is known as the approach. The

approach fixes the operating

temperature of the tower and is a most

important parameter in determining

both tower size and cost.

Drift - The water entrained in the air

flow and discharged to the atmosphere.

Drift loss does not include water lost by

evaporation. Proper tower design and

operation can minimize drift loss.

Heat Load - The amount of heat to

be removed from the circulating water

within the tower. Heat load is equal to

water circulation rate (gpm) times the

cooling range times 500 and is

expressed in BTU/hr. Heat load is also

an important parameter in determining

tower size and cost.

Ton - An evaporative cooling ton is

15,000 BTU's per hour.

Wet-Bulb Temperature - The lowest

temperature that water theoretically can

reach by evaporation. Wet-Bulb

Temperature is an extremely important

parameter in tower selection and design

and should be measured by a

psychrometer.

Pumping Head - The pressure

required to pump the water from the

tower basin, through the entire system

and return to the cooling tower.

Make-Up - The amount of water

required to replace normal losses caused

by bleed-off, drift, and evaporation.

Bleed Off (Blowdown) - The

circulating water in the tower, which is

discharged to waste to help keep the

dissolved solids concentration of the

water below a maximum allowable limit.

As a result of evaporation, dissolved

solids concentration will continually

increase unless reduced by bleed off.

Water Treatment

"# Delta’s Cooling Towers are

fabricated of non-corrosive engineered

plastics which are resistant to water

treatment chemicals including common

fungicides and bactericides.

1

"# Follow appropriate water treatment

practices such as required and take

frequent sample tests to avoid

possible water contamination. We

also recommend water treatment

maintenance as a measure of

protection for the environment in

the vicinity of any cooling tower or

other equipment open to

atmosphere.

"# To determine the appropriate

water treatment practices for your

particular application, it is

suggested that you contact a local

water treatment firm for their

recommendation.

"# Bleed-off is also important to water

quality. Evaporation of the

recirculated water does not remove

the dissolved solids that are

present in the water. Without

bleed-off, the continual buildup of

these solids will impair the proper

functioning of the equipment in the

system.

"# A bleed line can be connected in

any part of the system with routing

to the sewer. Normally, it is most

desirable to make this connection

in the hot water line at the cooling

tower. A petcock type valve,

installed in the bleed line is

recommended. Normally, bleed-off

of 1% to 2% of the recirculation

water flow is satisfactory. The

required amount of bleed-off water

must be replaced with properly

controlled amounts of make-up

water.


General Information

Safety

When handling, lifting, installing or

operating the cooling tower, always

employ safe work procedures according

to best practices of the trade and

according to applicable construction,

electrical and safety standards,

regulations and codes.

Follow all safety practices

described in these instructions.

On -Site Inspection

Upon arrival at the job site, carefully

inspect the shipment for any damage. If

shipping damage has occurred, notify

the driver or the carrier immediately in

writing of all damage. Check that all

items listed on the Shipping Bill of

Lading have been received.

Offloading (see Figure 1)

The $T-200/250I cooling towers are

normally delivered to the site on a “low

boy” or “drop deck” trailer. The $T-

55/70/85/100/125/150/175I cooling

towers are normally shipped in a

closed van, and can be off-loaded by

fork truck. The tower body is shipped

strapped down on a skid. The fan

assembly with motor is crated

separately. Unload the tower body

Approximate Weights

The induced draft cooling towers are

manufactured in two basic sections; a

polyethylene tower body and a fan

assembly section. Both of these sections

are factory assembled and packaged

separately for field installation.

Approximate Weights (lbs.)

Overall

Dimensions

(inch)

Model # Shipping Operating W x L x H

$T-55I

$T-70I

$T-85I

$T-100I

$T-125I

$T-150I

$T-175I

$T-200I

$T-250I

1,180

1,250

1,270

1,510

1,585

1,785

1,925

3,170

3,365

3,980

4,050

4,070

4,235

4,310

5,570

5,810

8,355

8,500

84 x 146

84 x 146

84 x 146

84 x 146

84 x 146

95 x 179

95 x 179

114 x 218

114 x 218

Dimensions and Other Physical

Data

For cooling tower dimensions, design for

foundations, assembly and layout; refer

to the following drawings, which are a

part of these instructions:

Model # Title Drawing No.

$T-55I, $T-

70I

Assembly DT-D-81-756

&

$T-85I

Layout DT-D-81-755

$T-100I

&

Assembly DT-D-81-754

$T-125I Layout DT-D-81-755

$T-150I

&

Assembly DT-D-83-754

$T-175I Layout DT-D-83-755

$T-200I

&

Assembly DT-D-80-754

$T-250I Layout DT-D-80-755

NOTE: Elevation of the center of

gravity of the tower body (without fan

assembly) is approximately at

the top of the ribs.

together with shipping skid.

Handling and Installation of Your Paragon ! Cooling Tower

Figure 1 - Offloading

2


Lifting with crane:

"# Before lifting, inspect skid and

banding material and align or repair, if

necessary.

"# Use fabric slings of sufficient

strength for better load distribution

and protection of the plastic tower

body. Pass slings around the tower body

itself. (This procedure should not be

used for high or extended lifts unless

the

skid is secured to the tower body with

additional strapping).

"# Locate the slings of sufficient

strength for better load distribution and

protection of the plastic tower body.

Pass slings around the tower body itself.

(This procedure should not be used for

high or extended lifts unless the skid is

secured to the tower body with

additional strapping).

"# Use a spreader bar or crane boom

with adequate length straps in order to

maintain an angle of 60° or less

between slings.

Offloading with fork truck:

"# A fork truck of sufficient

capacity may be used for offloading.

The forks should pass under the skid

along the length of the tower body with

the tips of the fork extensions passing

under the middle saddle of the skid, or

bearing on fork tip supports where they

are provided. A strap should be placed

around the tower body and forks to

secure the load.

"# Fork extensions (about 10 ft.

long) are necessary for models $T-

200/250I tower skids.

Store the fan assembly with all shipping

padding or bracing in place on the

shipping skid in a secure location at the

job site until the time of installation.

After offloading, store the tower body

upright.

CAUTION: For extended lifts, use

duplicate rigging as an additional safety

precaution.

Uprighting and Lifting of Cooling

Tower

"# All four (4) sprinkler lateral arms,

(see Figure 2), are normally shipped

detached and are packaged and secure

inside the tower. Remove these lateral

arms before up-righting and lifting

cooling tower.

"# Remove shipping skid straps.

"# Hooks and cables of sufficient

strength should be used for lifting.

"# Two (2) aluminum lifting lugs

secured to the top of the cylindrical

section of the cooling tower are

provided for uprighting and lifting

purposes. Install adequate hooks and

cable to each of these lifting lugs, lift the

cooling tower upright and set it on a

smooth, flat and rigid surface. Use guide

lines as necessary, to prevent damage

to the cooling tower, and as a safety

measure to control and avoid sudden

shifts or movements of the load.

"# IMPORTANT: For extended lifts

over 25 feet in height, use fabric slings

underneath the cooling tower and

secure them at the lifting lug location,

as an additional safety precaution.

Remove air inlet louvers, as necessary,

to prevent their damage during

handling.

"# After re-checking the rigging, lift

the tower body and set in place on the

previously prepared foundation. Use

guide lines, as necessary, to stabilize the

load.

"# Remove the strut supports

attached

to the top of the tower and all padding

or packaging inside the tower. The

shipping supports on top of the fill

media, as well as other packaging, may

be removed through the inspection port

in the side of the cooling tower.

"# Replace previously removed

louvers.

CAUTION: When working inside the

cooling tower where the sprinkler

system is located, DO NOT step directly

on the fill. Use two (2) pieces of 3/8”

minimum thickness plywood each at

least 12” X 18” to distribute the worker’s

weight in order to prevent damage to

the fill.

Anchoring

The foundation must be flat, smooth

and rigid enough to be capable of

independent support of the cooling

Figure 2 – Water Distribution Sprinkler System

3

tower assembly and water load in the

sump at it's maximum level. (Refer to

Dimensions and Other Physical Data.)

"# Four hold-down lugs are provided

at the base of the tower with predrilled

holes for anchor bolts.

"# Final location of anchor bolts

should be matched with hold down

lugholes at time of installation.

"# Use ¾” diameter anchor bolts

(design pull-out load on one bolt is

1,500 lbs. for wind loading).

"# Do not shim under the base of the

tower to level.

"# If shimming of the anchor lug is

required, the shim should extend from

the bolt to the outside edge of anchor

lug. Do not over tighten anchor nuts.

"# Check that all the hexagonal bolts

on each lug are tight to prevent

nuisance leaks. Access can be made by

removing one of the air inlet PVC

louvers.

Water Distribution System / Tower

Internals Precheck

Before installing the fan ring assembly:

"# Check to be sure all bracing,

padding and shipping struts have been

removed.

"# Install the sprinkler lateral arms,

which were packaged separately. The

center of the hexagonal bolt on the

sprinkler head is at the center of the slot

located on the sprinkler port. Care

should be taken not to over-tighten the

bolts, which lock the sprinkler lateral

arms in place.


"# The drift eliminator blades are

preassembled and do not require any

adjustment. Simply check to be sure the

hose clamps on each end of the lateral

arms are tight. With the lateral arms

installed, the drift eliminator blades

should be parallel with the top of the fill

(See Fig. 2).

"# Rotate the sprinkler system by

hand to be sure it rotates freely.

"# Clean-out caps at the end of each

lateral arm are in place and are secured

with a fastener.

The inspection port in the side of the

cooling tower is provided to simplify

certain of these check points and to

facilitate flushing the sprinkler lateral

arms when necessary.

CAUTION: As described earlier, when

stepping on top of fill, distribute body

weight by means

of two plywood plates.

Lifting and Installation of the Fan

Assembly

"# Break down fan crate, tip fan

assembly, and set the fan ring on the

ground before lifting.

"# It is recommended that a sealant

caulking be placed all around the joint

between the fan ring flange and tower

shell.

"# Lift the fan assembly using the

lifting lugs located on the fan ring.

(Refer to Figure 3).

"# Align the yellow match mark on the

fan assembly with the yellow match

mark on the tower body.

Note: If field piping, or equipment

location dictates some other orientation,

consult Factory. Delta can not be

responsible for orientation other than

standard, if variations were not known

prior to shipment. Costs for field

corrections will be the responsibilities of

others, and may void equipment

warranty if Delta approval is not

obtained prior to any field changes.

"# Install eight (8) sets of fan

assembly mounting hardware shipped

loose with the tower. Use wide washers

on the oversize holes in the tower

flange. Do not tighten the self-locking

nuts until all the bolts are in place.

Some out-of-round distortion of the fan

mounting flange at the top of the tower

may be encountered. To match bolt

holes, apply a radial force to the flexible

tower body flange. A tapered alignment

“drift” pin may be used.

"# Recheck the mounting hardware

and tighten securely. Recommended

torque value is 35 ft.-lbs.

Electrical Wiring of Fan Motor and

Accessories

"# Installation of a vibration cut-out

switch is recommended. (Refer to tower

accessories available).

"# All electrical work should be

performed only by qualified personnel

and in accordance to prevailing electrical

codes, practices and safety standards.

"# The motor starter should be sized

on voltage, nominal horsepower, and

maximum full load current. This

current value can be found on the

nameplate. If the starter cannot accept

the maximum full load motor current,

the next size should be used.

"# Motor heaters should be selected

on the basics of maximum full load

current and service factors based on the

motor nameplate.

"# Standard "Cooling Tower Service"

motors are supplied with a minimum of

a 1.15 Service Factor.

"# Optional two speed motors are

single winding variable torque.

"# Run flexible conduit with some

slack from the motor conduit box to

terminal box outside the tower where

rigid conduit can be used.

"# Conduit holding clip screws can be

tapped directly into the tower wall. Use

maximum 3/8" screws.

4

"# For the typical wiring schematic of

fan motor and tower accessories, see

Delta dwg. DT -B-78-001, included with

these instructions.

Location, Piping and Connections

"# Refer to the following drawings

included with these instructions for

recommended layout and pipe

connection information.

Model # Drawing No.

$T-55/85I

$T-100/125I

$T-150/175I

$T-200/250I

DT-D-81-756

DT-D-81-755

DT-D-81-754

DT-D-81-755

DT-D-83-754

DT-D-83-755

DT-D-80-754

DT-D-80-755

"# Piping should be adequately sized

in accordance with accepted standard

practices.

"# Gravity drain to indoor storage

sump requires proper head differential

and piping design considerations.

Allowance must be made for flow, pipe

size, piping layout and distance of

cooling tower from the indoor storage

sump.

"# On multiple tower installations,

valving and/or pipe sizing should

balance pressure drops to provide equal

inlet pressures. Equalizing lines can be

installed between cooling tower sumps

and are available as an option from the

factory. Each tower should be valved

separately to allow for flow balancing or

isolation from service.

"# Prior to start-up check that the PVC

locknuts on all bulkhead fittings are

properly tightened to prevent nuisance

leaks. A chain wrench can be used to

check and tighten the locknuts.

"# Check that the SS hexagonal nuts

on the inlet and outlet PVC socket

flanges are properly tightened to

prevent nuisance leaks. While tightening

the nuts, do not allow the bolt to rotate.

This could damage the rubber seal

under the flat washer on the bolt head

located inside the cooling tower.

"# All supply and return piping must

be independently supported.


PVC Solvent Cementing

Instructions

The following procedure is

recommended for the preparation and

cementing of internal and external

piping for Delta Cooling Towers:

"# Cut ends of pipe square using a

handsaw and miter box. Tube cutters

with wheels designed for use with PVC

are acceptable, providing they do not

leave a raised bead on the outside

diameter of the pipe.

"# Use a chamfering tool or file to put

a 10° to 15° chamfer on the end of the

pipe. Lightly sand the area to be

cemented to remove gloss. Using a

clean rag, wipe pipe surface and fitting

socket to remove dirt, moisture and

grease. Acetone or similar solvent is

recommended for cleaning.

"# Check " dry fit" of pipe and fitting

by inserting pipe at least 1/3 of the way

into the fitting. Position pipe and fitting

to assure alignment. Pipe and fitting

should be at same temperature

condition.

Safety in Operation of the Fan

NEVER operate the fan when the

access panel or the entire fan guard is

removed.

NEVER remove access manhole cover

while fan is in operation.

NEVER operate fan when any work,

access, maintenance, trouble-shooting,

etc. is being performed on the inside of

the fan ring assembly or inside the

tower plenum.

"# Normally, electrical codes dictate a

disconnect box at the cooling tower.

"# The handle of the disconnect box

must be locked in the off position

and an OSHA DANGER tag (DO NOT

OPERATE) must be attached to

handle securely.

Note: Removing fuses from the

disconnect box may provide further

assurance, but only when

done by qualified personnel.

The foregoing precautions apply when

any type of internal access to the tower

is required, including the following

examples:

"# Using a clean, natural bristle brush

about 1/2 the size of the pipe diameter,

apply a primer to the fitting socket.

Apply primer with a scrubbing motion

until the surface is penetrated. Primer

should never be applied with a rag.

Repeated applications may be necessary

to achieve the desired dissolving action.

In the same manner, apply primer to

the pipe surface equal to the depth of

the fitting socket; making sure the

surface is well penetrated. Re-apply

primer to the fitting socket to make sure

it is still wet.

"# While both surfaces are still wet

with primer, use a clean brush to apply

a liberal coat of solvent cement to the

male end of the pipe. The amount

should be more than sufficient to fill any

gap. Next apply a light coat of solvent

cement to the inside of the socket, using

straight outward strokes to keep excess

cement out of the socket.

"# While both surfaces are still wet

with solvent cement, insert the pipe into

the socket with a quarter-turn twisting

motion. The pipe must be

"# Checking, maintenance or

replacement of any fan assembly

component.

"# Checking, maintenance or

replacement of the water

distribution system inside the

tower.

"# Cleaning of the fill.

"# Any work that necessitates removal

of any access door, the fan guard

or the manhole cover.

Water Distribution System

Water distribution is accomplished by a

low pressure, rotating, self-propelled

sprinkler system designed to

accommodate the specified flow rate.

The following points are important:

"# Substantial deviations from

specified water flow will inhibit proper

sprinkler and drift eliminator functions

and may necessitate replacement of the

sprinkler lateral arms, calibrated for a

new range of water flow.

"# Normal sprinkler rotational speed is

approximately 4 to 6 RPM, with both the

pump and the fan operating.

inserted the full length of the

socket. The application of solvent

cement to pipe and fitting, and the

insertion of the pipe into the fitting,

should be completed in less than one

minute. If necessary, two persons

should apply solvent cement to the pipe

and fitting simultaneously.

"# Hold the joint together for

approximately 30 seconds until both

surfaces are firmly gripped. After

assembly, a properly made joint will

usually show a bead of cement around

its entire perimeter. This should be

brushed off. It is recommended that the

joint be allowed to cure for 24 hours

before pressure testing or operation.

Operation and Maintenance of Your Paragon ! Cooling Tower

5

"# Rotation can be observed through

the inspection port in the side of the

tower.

"# Sprinkler RPM can be adjusted by a

slight rotation of the lateral arms at the

sprinkler head. Counter clockwise

rotation of the laterals will increase RPM.

The standard position is set by aligning

the center of the hexagonal bolt with

the center of the slot on the sprinkler

head. This angle was preset at the

factory and should not require

adjustment unless there is a genuine

necessity to do so.

IMPORTANT:

Following any adjustment of lateral arm

angles, eliminator blades must be readjusted

into horizontal position.

"# The maximum operating inlet

water temperature should not exceed

140° F.

"# The operating inlet pressure should

be as follows:

Model Measurement Flow Pressure

Location (GPM) (PSI)

T-55i – T-125i

Ground Level

Entering Tower

50-300

301-550

6 – 7

8 – 10

T-150i – T175i

Ground Level

Entering Tower

100-400

401-800

5 – 6

7 – 9

T-200i – T-250i

Ground Level

Entering Tower

150-750

751-1200

6 – 8

9 – 11


"# Do not over-tighten the hexagonal

bolts used for sprinkler lateral arm

adjustment.

"# Before start-up, check for free

rotation of the sprinkler system.

"# Periodically during operation, check

for proper RPM at design waterflow.

"# Clean out of the sprinkler lateral

arms is accomplished by removing the

end cap of each lateral through the side

inspection clean-out port in the tower

body.

"# Installation of a tower outlet

strainer (optional accessory) is

recommended as an effective and

economical means of preventing

clogging of sprinkler orifices.

CAUTION:

When stepping on top of the fill,

distribute the body weight by means of

two plywood plates as described earlier

in these instructions.

Sprinkler Head Maintenance

If the sprinkler revolution slows down or

stops despite normal and proper water

flow, the sprinkler head may require

removal for inspection and cleaning.

Note: Check the troubleshooting guide

first for other corrective action.

"# To remove the sprinkler head, first

remove the sprinkler lateral arm and

drift eliminator blade assemblies. Then

remove the two (2) riser pipe screws.

(Refer to Figures 2 and 4).

"# For proper inspection and cleaning,

the sprinkler head should be removed

from the tower. The steps to remove the

sprinkler head follow:

1. Match mark riser pipe assembly

and coupling. Remove the two (2)

riser pipe screws and remove the

entire sprinkler head assembly

from the coupling.

Note: It is necessary to shift the upper

split layer of fill to gain access to the

riser pipe screws. Remember to not step

directly on any fill and to use plywood to

distribute the load.

2. The self-tapping screws and the

PVC ring must be removed from

the sprinkler head provided with

Models $T-55I thru $T-125I

prior to removal of the head

body assembly. For the

convenience of reassembly,

match mark to PVC ring and the

lip of the sprinkler head. This

procedure is not necessary for

disassembly of the sprinkler

head for any other model.

3. Remove the top locknut and lift

the sprinkler head body

assembly to separate it from the

internal riser pipe.

"# Inspect the general condition of all

components, including the shaft seal, for

wear, mechanical interference, and

check for foreign matter on the frictional

surfaces.

"# Clean or order replacement

components as necessary. Consult

Factory prior to authorizing any field

repairs. Work by others without Delta

authorization may void warranty.

"# Pack shaft seal area and space

between spacer and threaded rod with

Bostik " Never-Seez” sealing compound

before reassembly.

"# Assemble in reverse order per the

above instructions.

"# After assembly, check that the

sprinkler head rotates freely.

"# The sprinkler head should be

inspected and cleaned every 2 to 3

years or more frequently depending on

operating environment.

Figure 4 – 6” Sprinkler Head Assembly

Optional Non-rotating Fixed Water

Distribution System

Delta offers an optional non-rotating

spray nozzle distribution system in lieu

of the standard rotating sprinkler

system. For models with this option, the

following items are important:

6

"# Check spray pattern from nozzles

to be sure there is no clogging by

removing man way cover.

"# The flow rate of the cooling tower

must be as close to the design GPM as

possible. The distribution system,

including the spray nozzles, are provided

for the design flow conditions. Underpumping

or over-pumping may cause

the cooling tower to perform

inefficiently.

"# Design pressure at the inlet

connection must be properly maintained

for proper water distribution. If the

pressure is less or greater than design,

proper water dispersion over the

internal wet decking will be impaired. If

the inlet pressure is low, water spray will

not cover the entire wet decking

surface. This causes channeling of air

and does not make maximum use of the

heat transfer media. High inlet

pressures will cause the water to overspray

the wet decking media, hit the

internal side walls of the tower shell and

drop in a vertical flow along the shell

walls without the opportunity for

maximum water / air contact through

the heat transfer media. Excessive high

spray pressure may also cause wet

decking fatigue and damage. Pressure

of 6-8 psi is required at the nozzle for

proper operation. If pressure

measurement is taken at the tower inlet,

an additional pressure should be added

to this value to compensate for the

elevation of the spray header relative to

the measurement location (see table

below). Correct flow rates and inlet

pressures should be determined prior to

completion of system installation.

Model Measurement Pressure

Location (PSI)

At Nozzle 6 – 8

T-55i – T-125i Ground Level

Entering Tower

9 – 11

At Nozzle 6 – 8

T-150i – T175i Ground Level

Entering Tower

10 – 12

At Nozzle 6 – 8

T-200i – T-250i Ground Level

Entering Tower

11 – 13

Required pressure for optional spray

nozzle distribution system

Direct Drive Fan Assembly and Its

Maintenance

Safety

Follow all safety instructions previously

discussed. Before performing any

inspection or maintenance on the direct

drive fan assembly, power to the fan

assembly must be disconnected.


Fan Assembly:

The Air moving system is a direct

drive fan assembly where the motor is

connected directly to the propeller. This

system has a minimal amount of moving

parts and, therefore, maintenance issues

are minimal.

"# Delta recommends the use of

Vibration Cut-Out Switches (VCOS) for

the fan(s). Vibration cut-out switch

provides for fan motor circuit disconnect

for shutdown protection should

abnormal fan vibration develop during

service.

"# The propeller blades have an

adjustable pitch. The pitch is set in the

factory prior to shipment for the proper

airflow and HP.

Motor:

"# The standard motor is a NEMA

Premium Efficiency, totally enclosed

motor, Inverter Rated with extra

moisture protection on the windings,

Class F insulation, 1.15 minimum service

factor, epoxy coating on outside frame,

and is specifically designed for cooling

tower duty to the exclusive

specifications of Delta Cooling Towers.

"# Should there be a problem with the

motor, which may be covered under our

standard warranty, the motor must

only be inspected and serviced by an

authorized agent of the motor

manufacturer, otherwise the warranty is

void.

"# If the motor bearings have grease

fittings, follow the lubrication

recommendations as outlined in

instructions from motor manufacturer.

The majority of motors do not require

greasing.

Start-Up Instructions

Complete all start-up instructions before

applying heat load.

"# Clean any accumulated debris or

packaging material from inside tower

sump.

"# Check to be sure that the fan

motor is properly wired for correct

rotation as viewed from the top of the

fan. Reverse leads will cause incorrect

rotation and reverse direction of airflow.

Note: Fan rotation should always agree

with rotation labels. Standard fan

rotation is clockwise, (C.W.) however;

non-standard fans may be designed to

rotate counter clockwise, (C.C.W.)

"# Check for free rotation of the fan

and fan blade tip clearance.

Tower Model # Operating level

(from bottom of sump)

$T-55I thru $T-125I

$T-150I / $T-175I

$T-200I / $T-250I

"# Check for free rotation of the

sprinkler system. This can be

accomplished by removing the

inspection cover and moving the lateral

arms by hand.

"# Extend the PVC deflectors outward

under each louver panel to allow them

to catch any splashes of water that may

get through the louver. It’s

recommended to apply a bead of marine

sealant along the outer edges.

"# Fill the cooling tower sump or the

cold water storage reservoir on gravity

drain applications.

"# Water recirculation pump should be

primed and all piping below the tower

sump filled with water. Check pump for

proper shaft rotation.

"# Start water recirculation pump and

adjust flow to design. A flow metering

device installed in the inlet is

recommended but if not available, use

the pressure differential across the

pump in conjunction with the pump

curve.

"# Check flow pattern from sprinkler

lateral arms to be sure there is no

clogging of orifices. If necessary, clean

out lateral arms by removing the end

caps, which are accessible through the

clean-out hole near the top of the tower.

"# Start up fan motor and check

amperage and voltage against motor

nameplate data.

"# The standard make-up valve

assembly is shipped with the plastic float

ball strapped against the tower side to

prevent damage. To set the ball for

proper operation, loosen the screw in

the fulcrum arm, lift or depress the arm

with the plunger pressed against the

valve seat and tighten. Repeat until the

proper operating level is obtained (Refer

to operating level table below). It is

recommended that a shut-off valve be

installed in the make-up line.

7

Between 13-15 inches

Between 14-16 inches

Between 15-17 inches

"# After 24 hours of operation:

!" Check lateral arms for

clogging.

!" Check tower sump water

level.

Water Level in Tower Sump

"# When the cooling tower is being

operated with pump-suction, the makeup

valve assembly with float ball should

be adjusted to set the water operating

level as follows:

"# Remove the PVC louver closest to

the make-up valve assembly to gain

access to make-up valve assembly.

"# A lower water level than

recommended may cause air to be

drawn into the tower outlet piping and

cause pump "cavitation."

"# A water level higher than

recommended will cause continuous

overflow and waste of water as a result

of potential “pull-down” from the piping

when the system is shut down.

"# The overflow should NEVER be

capped, or its elevation altered by

raising external piping.

Note: On gravity drain cooling towers,

make-up assembly, overflow, drain and

vortex breaker are not provided.

Cold Weather Operation

Cold Weather Protection

The cooling tower may require

protection against freezing at light heat

loads when the wet-bulb temperature is

under 32°F., or during shutdown when

the temperature drops below 32°F.

The following methods are

recommended for use in Delta Cooling

towers for protection during cold

weather conditions. Recommended

equipment is optional and may be

ordered from the factory. Consult the

factory for further information on which

equipment to choose for your specific

application.

Separate Indoor Sump

This method is virtually foolproof

antifreeze protection system with the

added advantage of minimum

maintenance. The indoor sump tank

should be large enough to fill the entire

recirculation system without danger of

pump cavitation. As a general rule, the

tank should be sized to hold three times

the rate of circulation in gallons per

minute (gpm).


The tank should be provided with

properly sized overflow, make-up drain

and suction connections. When a

separate sump is ordered with a cooling

tower, the water make-up valve

assembly and the overflow and drain

connections are installed in the indoor

sump only.

When a sump tank is used, the cooling

tower should be located high enough

above it to allow free cold water gravity

drain. A bottom outlet can be provided

for gravity drain to indoor sump tank

installations. Adequate size outlet and

piping is dependent on system piping

configurations. Delta can provide larger

outlets for free gravity flow if required.

Reverse siphoning is a back flow of

non-potable, recirculating water

into a potable water system, which

can occur through the make-up

float valve assembly located in the

water reservoir. Should the valve

malfunction, blockage of the

overflow or outlet lines would

cause water level to rise in the

reservoir, and the make-up water

pressure could drop below the

atmospheric pressure creating a

vacuum at the make-up inlet.

Although precautions to prevent

reverse siphoning are incorporated

in the cooling tower design, we

also recommend installing a check

valve in the water make-up supply

line, as a backup precaution.

Electric Immersion Heater

Cooling towers ordered with antifreeze

systems are shipped with a protective

seat secured under the immersion

heater probe, which must remain in

place during operation to protect the

polyethylene shell from the heater

element.

Note: This seat is not a shipping brace

and must not be removed.

Thermostatic On/Off Control

A thermostatically controlled fan for

on/off operation, should be considered

as an energy saving feature, for capacity

control during winter operation. The

thermostatic control can be field set to

insure automatic fan shut-down when

cold water drops below design

temperatures, as well as fan start-up

when cold water rises to design

temperature.

A thermostatic control provides excellent

cooling tower anti-freeze protection

while reducing operating costs

throughout cold weather operation.

Drain Line

To prevent damage to the PVC

distribution system during cold weather

shut-down, install an automatic or

manual drain line from the hot water

inlet piping as close to the cooling tower

inlet as possible. The entire inlet and

distribution system must be drained for

shut-down in sub-freezing weather.

Piping

When the cooling tower is located

outdoors, adequate measures including

the use of heating tapes and insulation

should be considered to protect water

lines from freezing.

Operation at Sub-freezing

Ambients

See Thermostatic On/Off control

To prevent ice formation, insure that

tower operates at maximum possible

heat load.

If tower is equipped with two speed

motors, operate at low speed to

increase leaving water temperature.

On multi-cell installations, it may also be

necessary to cycle fan(s) periodically to

prevent ice formation on the intake

louvers and the wet decking. If fan(s)

are operated in reverse, DO NOT

8

operate in reverse any longer than is

necessary. Extended reverse operation

can cause ice to form on the fan blades

causing an out-of-balance condition. A

vibration cut-out switch is always

recommended. When reversing the

fans, they should always be

allowed to come to a complete stop

before starting up in the opposite

direction.

The importance of frequent visual

inspections and routine maintenance

during sub-freezing operation is very

important and should not be overlooked.


Trouble-Shooting Guide For Paragon!

Induced Draft Cooling Towers

Problem Possible Causes Corrective Actions

Increase in the leaving water temperature

Drop in the water flow rate.

Low water flow rate

1. Excess water flow; over pumping.

2. Recirculation of hot discharge air, back

into the cooling tower air intakes.

Obstructed air intakes

3. Proximity of other heat source or

discharge of moist air.

4. Improper operation of sprinkler

system.

A. Orifices clogged.

B. RPM too slow or sprinkler stops.

a. Preset angle of orifices was

changed.

b. Actual water flow is lower than

design sprinkler rating.

c. Mechanical causes.

5. Clogged fill.

6. Damaged fill.

7. Additional heat load on system.

8. Wet-bulb temperature higher than

design.

1. Blockage of sprinkler lateral arm

orifices.

2. Low water level in sump causing air to

be drawn into pump and piping.

3. Improper selection of water circulating

pump.

4. Blockage of strainers.

5. Pump malfunction.

Noise and vibration 1. Loose bolts.

2. Mechanical interference of rotating

parts.

Sudden or short term irregularities of cold

water level in basin

Excessively high water level in sump on

gravity drain installation

3. Fan propeller damaged or out of

balance.

4. Air intake at pump.

5. Pump cavitation.

6. Damaged motor bearings.

1. Peculiarities of specific system

and its operation.

1. Gravity flow restrictions due to

insufficient head differential.

9

1. Adjust to the design flow.

2. Eliminate obstructions which impede air

discharge. For proper location of cooling

tower(s), see Delta dwgs. Baffle air

discharge, if necessary.

3. Remove source or relocate tower.

4. See water distribution system instructions.

A. Flush lateral arms, clean orifices, clean

system, install outlet strainer.

B.

a. Reset properly or increase angle of

lateral arms.

b. Install properly rated sprinkler

lateral arms or increase to design

flow.

c. Check for clearance between

lateral arms & walls. Check

sprinkler head. See sprinkler head

maintenance.

5. Clean the fill.

6. Replace the fill.

7. Contact Delta for possible upgrade or

addition of another cooling tower selected

for additional load.

8. None required if condition is temporary.

Otherwise consult Delta for upgrade.

1. Flush lateral arms. Clean whole system.

Install outlet strainer.

2. Adjust float valves. Be sure the system is

flooded and balanced.

3. Replace with proper size pump designed for

flow and head requirements. Check pump

“Net positive suction head.”

4. Backwash or clean.

5. Consult pump specialist.

1. Recheck and tighten all bolts to specified

torque.

2. Inspect propeller for free rotation. Check

propeller for mechanical interference. Adjust,

repair or replace, as necessary.

3. Replace components, as necessary and

check balance. Install vibration cut-out

switch.

4. Check basin water level and irregular piping

design.

5. Match pump NPSH with system hydraulics.

6. Check and replace motor.

1. Inspect system and review operation

procedures. Correct, as applicable valve

settings, loss of water in system, fill system

to flooded capacity.

1. Correct if Necessary:

A. Outlet piping should terminate below sump

tank water level.

B. Increase discharge pipe size.

C. Increase head by means other than A.


Problem Possible Causes Corrective Actions

Excessively high water level in sump on

gravity drain installation (continued).

Excessively high water level in tower

basin on closed loop system installations

Uneven water level in tower basins of

multi-cell installations

1. Airlock.

2. Unnecessary obstruction of

waterflow (i.e., partially closed

valve).

3. Undersized piping.

4. Horizontal pipe run too long.

5. Improper hydraulic pipe design.

6. Outlet vortex breaker provided.

1. Make-up valve float set too high.

2. Valve or float damaged or

malfunctioning.

3. Make-up water pressure too high.

1. Unbalanced system hydraulics.

2. More than one make-up valve

operating, and set for different water

levels.

Excessive water carry over (drift) 1. Surfaces of top layer of fill damaged

causing “pooling” of water.

2. Eliminator(s) not horizontal.

3. Damaged eliminator.

4. Excess water flow causing high

sprinkler RPM.

5. Improper angle of sprinkler lateral

arms causing high RPM.

6. Orifices in lateral arms clogged

causing improper water dispersement

and high RPM.

7. Blockage of fill.

Premature or excessive corrosion of fan

drive components

1. Excessive drift.

2. Presence of corrosive chemicals in air

or water that was not known at time

of supply.

10

1. Install an air bleed valve at highest

point of piping, usually at a vertical

angle.

2. Remove obstruction.

3. Increase pipe size.

4. Shorten, if possible.

5. Correct design.

6. Remove vortex breaker.

1. Readjust float arm.

2. Repair or replace.

3. Reduce pressure or contact Delta for

alternate solutions.

1. A. Install equalizer line with isolation

valves between modules.

B. Adjust inlet water flow to insure equal

distribution to each cooling tower

module.

C. Review outlet header hydraulics and

correct piping design, if applicable.

D. Contact Delta for assistance.

2. A. Adjust float level settings relative

To one another.

B. Shut-off and or/throttle flow to

one or more valves.

C. Installation of equalizers is

highly recommended.

1. Replace top layer. Protect fill when working

inside tower.

2. Adjust to horizontal position.

3. Replace.

4. Reduce water flow or install lateral arms

designed for the actual operating flow.

5. Reduced the angle of the lateral arms.

(Rotate arms CW slightly).

6. Install outlet strainer. Clean whole system

and lateral arms.

7. Clean fill.

1. See “ Excessive Water Carry Over (Drift)”

above.

2. Remove source of corrosion or contact

Delta for alternative materials, premium

coatings or other precautions.


Motor Trouble Shooting Guide (General)

Problem Possible Causes Corrective Actions

High current draw (all 3 phases) 1. Low line voltage (5 to 10% lower

than nameplate).

2. 200V motor on 230/240V system.

3. 230V motor on 208V system.

4. Incorrect propeller.

5. Incorrect pitch adjustment

Low motor current draw 1. Incorrect propeller.

2. Incorrect pitch adjustment.

Unbalanced current

(5% from average)

1. Unbalanced line voltage due to:

A. Power supply.

B. Unbalance system loading.

C. High resistance connection.

D. Undersized supply lines.

2. Defective Motor.

1. Inadequate power supply.

2. Undersized supply lines.

3. High resistance connections.

1. Consult power company.

2. Change to 230V motor.

3. Change to 200V or 280V motor.

4. Consult Delta.

5. Reduce pitch / consult Delta

1. Consult factory

2. Increase pitch / consult factory

1. Consult power company and/or

electrician.

2. Replace motor.

Excessive voltage drop

1. Consult power company.

(2 or 3% of supply voltage)

2. Increase line sizes.

3. Check motor leads and other

connections.

Overload relays tripping 1. Overload.

1. Reduce load on motor or increase

motor size.

2. Unbalanced input current.

2. Balance supply voltage.

3. Single phasing.

3. Eliminate.

4. Excessive voltage drop.

4. Eliminate (see above).

5. Frequent starting or intermittent 5. Reduce frequency of starting and

overloading.

overloading or increase motor size.

6. High ambient starter temperature. 6. Reduce ambient temperature.

7. Wrong size relays.

7. Correct size per nameplate current

and service factor.

8. Improper overload settings of

adjustable relays.

8. Readjust to motor FL Amps x S.F.

Motor runs very hot 1. Overloaded.

1. Reduce overload.

2. Blocked ventilation.

2. Fouled fill or air restriction.

3. High ambient temperature.

3. Reduce ambient temperature.

4. Unbalanced input current.

4. Balanced supply voltage.

5. Single phased.

5. Eliminate.

Motor will not start 1. Single phased.

1. Shut power off – eliminate.

2. Rotor or bearings locked.

2. Shut power off – check shaft rotation.

Excessive vibration (Mechanical)

Out of balance

1. Motor mounting.

1. Check to be sure motor mounting

hardware is tight.

2. Motor.

2. Replace motor.

Low current draw (all 3 leads) See “Low Current Draw” entry in cooling

Tower trouble-shooting guide.

Note: Consult Warranty page prior to replacing or repairing any cooling tower components. Delta recommendation and consent to

remedy material and workmanship defects is necessary, to avoid breach of Warranty

11


Paragon! Optional Accessories Available

!" Aluminum Ladder(s) with a step platform and railing at the fan elevation custom designed for the cooling tower.

!" Safety cage(s).

!" Two speed motor(s)

!" Vibration cut-out switch provides for fan motor circuit disconnect for shutdown protection should abnormal fan vibration develop

during service. Installation of vibration cut-out switches are recommended as good design practice.

!" Thermostat on/off control of fan operation through sensing the temperature of water leaving the tower.

!" Basin anti-freeze system for cold weather operation.

!" Skid mounted pre-piped and pre-wired pump and control systems

!" Polyethylene Sump tanks up to 10,000 gallons for indoor installation for anti-freeze protection during winter operation or process

requirements.

!" Motor space heaters are recommended for unusually high relative humidity conditions where extreme day to night temperatures

can cause excessive condensation in the motor, when in operation during this period.

!" Plastic outlet sump strainer.

!" Plastic equalizer fittings.

!" Variable frequency drive on fan motors, controlled by temperature controller.

!" High sump level switch

!" Automatic drain valve

Consult factory or a Delta representative for further information and an updated list of accessories.

Paragon ! Recommended Replacement Parts

To avoid costly cooling tower downtime, the following replacement parts should be carried in inventory at the installation site:

!" Make-up float, or complete make-up valve assembly.

!" Fan Motor.

!" Complete spare sprinkler head assembly or spray nozzle

!" Fan Propeller.

When ordering, include model number and serial number of the cooling tower as it appears on the tower nameplate. Under normal

conditions, shipment of factory replacement parts is made within one day after the order is received. Spare pumps and pump parts, as

well as control panel components, such as fuses and heaters for magnetic starters, are also available.

Appendices/ Reference Documents

Additional Drawings Available Upon Request:

Delta Drawings

!" DT-D-81-756 Model $T-55/85I Assembly

!" DT-D-81-754 Model $T-100/125I Assembly

!" DT-D-81-755 Model $T-55 - 125I Single/ Multicell Layout

!" DT-D-83-754 Model $T-150/175I Assembly

!" DT-D-83-755 Model $T-150/175I Single/ Multicell Layout

!" DT-D-80-754 Model $T-200/250I Assembly

!" DT-D-80-755 Model $T-200/250I Single/ Multicell Layout

!" DT-B-80-520 Ladder Installation Instructions

!" DT-B-78-001 Wiring Schematic, 3 phase

!" DT-B-78-005 Wiring Schematic, 2 speed

!" DT-B-78-006 Wiring Schematic, 1 phase

!" DT-B-78-008 Wiring Automatic Drain

!" DT-B-78-015 Wiring High Sump Level Switch

!" DT-B-78-011 High Sump Level Switch & Electronic Make Up Package

!" DT-B-78-010 Heater Support Detail

!" DT-A-80-517 Vibration Switch

!" DT-B-80-525 Antifreeze Immersion Heater Package

!" DT-B-78-007 Fan Thermostat

!" DT-B-80-540 Automatic Drain Valve

12


Preventative Maintenance Checklist

Procedure Monthly Every

3 Months

Inspect General Condition of cooling tower.

Check Water Level in cold water basin.

Adjust if needed.

Check float ball & Make-up Valve for proper

operation.

Check Line Voltage, Motor Amperage,

Water Pressure.

Clean Sump Strainers, if installed.

Lubricate Motor Bearing, (if motor has fittings

for greasing. The majority of motors require

no external greasing). Use Proper

Lubricants. Increase frequency, as

necessary depending on conditions of service.

Check for obstructed Water Flow Through

Orifices. Clean and flush spray nozzles, as

required.

Check All Bolts which can cause unbalance

and vibration and tighten specified torque.

Check Condition of Water for proper

treatment to prevent build-up of algae and

solids concentration

Clean and flush Cold Water Sump

!

!

!

!

!

13

!

!

!

!

Every

6 months

!


Premier Cooling Towers

are low profile, induced draft counter-

flow design cooling towers with

single module capacities from 254 to

502 cooling tons. These towers use

the same unitary seamless

engineered plastic construction in a

low profile design that Delta has

been manufacturing since 1997 and

have been very well received in

both commercial and industrial

applications.

PREMIER

Induced Draft, Counter Flow Design

254 – 502 Ton Single Modules

STANDARD FEATURES:

! Seamless Engineered Plastic (HDPE) Shell

! Corrosion Proof Construction

! Coated Steel Mounting Platform

! Direct Drive Fan System with Totally Enclosed Inverter-Rated

Cooling Tower Duty Motors

! 15 Year Shell Warranty

! PVC Water Distribution System with Non-clog Large Orifice

Removable PVC Nozzles

! High Efficiency PVC Fill

! Made in the USA

Compare the value Delta Cooling Towers offer against

the value of other comparable units. You will find the

benefits we can provide are unique and superior:

! Energy Efficiency – low fan HP from optimized cooling

counter-flow design, low pump head.

! Non-Corroding Materials of Construction – impervious to

chemicals, acids and salts.

! Cost Less to Maintain – will not rust, chip, or ever require

painting for extraordinary tower life.

! Unique Design – provides unlimited flexibility of modular

operation, future upgrade capability, and location convenience.

! One-Piece Construction – strong and long lasting. Shell is

backed by a 15 year warranty.

! Cost Less to Install and Operate – light weight construction

reduces rigging and structural roof support requirements.

Maintenance costs and water treatment chemicals cost are

significantly lowered.

OPTIONS AVAILABLE:

! Two Speed Motors

! Thermostatic On/Off Fan Control Package

! Anti Freeze Basin Heaters

! Pump(s) / Skid Mounted Pump and Control Stations

! Sump Level Switches

! Stainless Steel Basket Strainers

! Control Panels / Variable Frequency Drives

! Storage Tanks

Phone: 973-586-2201 " 1-800-BUY-DELTA " Fax: 973-586-2243 " www.deltacooling.com


DIRECT DRIVE

AIR MOVING

SYSTEM

Totally enclosed highefficiency

cooling tower

duty motors power

multiple fiber-reinforced

polypropylene axial

propeller fans.

LIGHTWEIGHT

&

HEAVY DUTY

Plastic is lighter than

conventional cooling towers

and average wall thickness is

5-10 times sheet metal towers.

DRIFT

ELIMINATOR

Three pass PVC drift

eliminator prevents water

droplets from leaving the

tower.

LEAK-PROOF

SUMP

Molded as Unitary

(One-Piece) Structure

that has no joints to

leak or require recaulking

and sealing.

PREMIER

Induced Draft, Counter Flow Design

250 – 500 Ton Single Modules

NOZZLE WATER

DISTRIBUTION

SYSTEM

Non-Clog large orifice

removable nozzles evenly

distribute the water.

INSTALLATION

PLATFORM

Base coated steel structure

eases installation by

spanning existing structures

or flexibility in designing

new installations.

FILL

MATERIAL

High efficiency

PVC cellular

design for

maximum cooling.

CORROSION-

PROOF SHELL

HDPE Plastic construction

can not corrode and is

backed by a 15 Year

Warranty.

Model Approximate Weight Dimensions Capacity Fan Motor Sump Capacity

Number Shipping Operating L x W x Ht. Tons HP Gallons

TR-205812 3,900 7,990 15.5’ x 8.5’ x 11’ 254 5 x (2) 450

TR-275812 3,980 8,140 15.5’ x 8.5’ x 11’ 292 7.5 x (2) 450

TR-210812 4,100 8,300 15.5’ x 8.5’ x 11’ 319 10 x (2) 450

TR-305812 6,050 11,960 21.5’ x 8.5’ x 11’ 408 5 x (3) 720

TR-375812 6,170 12,150 21.5’ x 8.5’ x 11’ 460 7.5 x (3) 720

TR-310812 6,350 12,430 21.5’ x 8.5’ x 11’ 502 10 x (3) 720

The information, recommendations and options set forth herein are offered solely for your consideration, inquiry and verification, and are not, in part or total to be construed as constituting a warranty or

representation for which we assume legal responsibility.

Delta Cooling Towers, Inc.

Leader in Non-Corroding Cooling Tower Technology

Tel: 973-586-2201 " Fax: 973-586-2243 " 800-BUY-DELTA " www.deltacooling.com


Delta Cooling Towers, Inc.

41 Pine Street

P.O. Box 315

Rockaway, New Jersey 07866-0315

Telephone 973.586.2201

Fax 973.586.2243

www.deltacooling.com

sales@deltacooling.com

PREMIER ! Low Profile Induced Draft Cooling Tower Specifications

PREMIER ! low profile cooling towers are induced draft counterflow cooling towers with

single module capacities from 250 to 500 cooling tons. These towers use a unitary

seamless engineered plastic construction in a low profile design that Delta Cooling

Towers has been manufacturing since 1997 and have been very well received in both

commercial and industrial applications. There are three overriding principles that make

PREMIER ! cooling towers an excellent selection.

The towers are corrosion-proof, not corrosion-protected, which is an important

distinction of Delta towers. Cooling towers are outdoor equipment, either on roofs or

sides of buildings, and are subjected to weather extremes continuously. Delta towers

are manufactured in a seamless engineered plastic (HDPE) structural shell, which is

corrosion-proof and will not rust, chip, peel, crack or ever need painting or additional

protective coatings. Comparably priced towers are often sheet metal with a galvanized

coating. Zinc galvanizing provides only an interim protection against corrosion. This

galvanizing wears away, often unevenly, exposing sheet metal to the rapid corrosive

environment of cooling tower duty.

The second principle of Delta towers is the engineering that led to a simplicity of design,

translating into reliability and a trouble-free life of the towers. From the seamless

cooling tower shell to the direct drive fan assemblies, there are less overall components

and systems within the tower to maintain. The towers are shipped factory complete with

little more installation steps than hooking up the electrical and water. This design

simplicity is recognized in many other industries as a key goal and leads to greater

reliability and owner peace of mind.

Finally, the PREMIER ! induced draft cooling towers are a high efficiency design, which

translates to very low energy costs to operate the towers. The design of the towers and

the proprietary high efficiency fill material lead to this energy efficiency. The minimal

operating costs, a track record of superior reliability and corrosion proof materials of

construction makes the PREMIER ! Induced Draft Cooling Tower the choice for cooling

tower applications over 250 cooling tons.


Delta Cooling Towers, Inc, Premier ! Low Profile Induced Draft Cooling Tower Specifications, Page 2 of 5

PART 1 GENERAL

1.1 SCOPE

PREMIER ! INDUCED DRAFT COOLING TOWER

Work included to furnish and install Delta Cooling Tower model "TR_______ consisting

of all equipment necessary to provide a complete operating system to remove specified

heat load. Cooling towers shall be packaged, factory preassembled to the fullest extent

possible, induced draft, counter flow design

1.2 RELATED WORK

{insert related work document here}

1.3 REFERENCES - STANDARDS

AMCA - Air Moving and Conditioning Association

ASTM - American Society for Testing and Materials

ANSI - American National Standards Institute

ASME - American Society of Mechanical Engineers

1.4 QUALIFICATIONS

The cooling tower shall be manufactured by a company with at least 30 years

experience manufacturer of seamless engineered polyethylene cooling tower systems.

1.5 WARRANTY

Shell shall be warranted for 15 years and all other equipment shall be warranted for one

year against material and workmanship defects from date of shipment.

1.6 SUBMITTALS

Shop drawings shall be provided and shall include but not be limited to:

A. System dimension

B. Operating and dry weight

C. Details of equipment

D. Mounting and support requirements

E. Descriptions and specifications


Delta Cooling Towers, Inc, Premier ! Low Profile Induced Draft Cooling Tower Specifications, Page 3 of 5

PART 2 PRODUCT

The cooling tower specified shall be factory complete, assembled to the fullest extent

possible.

2.1 Induced Draft Cooling Tower, Model "TR________, _______ tons capacity,

______ GPM, _____# F hot water temperature, _____#F cold water temperature,

_____ #F wet bulb temperature.

A. Cooling tower

1. Shell shall be seamless, non-corrosive, hi-impact high density polyethylene

(HDPE) of leak proof design. Conical transition for motor/fan assembly and

integrally molded louvered inlet section around base of cooling tower

integrated for optimum air distribution. The shell shall exceed 1/4" average

thickness. The structural shell shall be capable of withstanding water

temperatures up to 160#F on a continual basis.

2. Sump shall be integral with cooling tower shell, creating a one-piece

seamless structure.

3. Cooling tower structural shell shall be guaranteed against corrosion for 15 years.

4. Removable PVC louver panels located above the integral cold sump for

accessibility to automatic make-up valve and adjustable float.

5. PVC flanged fittings shall be provided for inlet, outlet, overflow, drain

and make up.

6. Outlet fitting for pump suction applications shall be provided with a vortex

breaker.

7. Make up assembly shall be incorporated in the sump of the cooling tower. It

shall be a mechanical valve assembly, adjustable height for varying operating

condition.

The engineered plastic shell is the optimum material for cooling tower construction. The material is molded into a

totally seamless shell, which will never leak, unlike conventional cooling towers which require many panels, joints,

seams, seam gaskets, caulking and hundreds of bolts or other fasteners to maintain the integrity of the product. The

Delta structural shell will never rust, chip, crack or ever need painting or further protective coatings. The structural

shell is warranted for 15 years which is much longer than other available cooling towers

Galvanized steel towers provide only interim corrosion protection. The zinc galvanizing is designed only to delay

corrosion as the zinc wears steadily away. Moderately high temperatures and various water chemical treatments

speed up this leaching of zinc into the water or atmosphere. With only ounces per square foot of corrosion

protection, it is only a matter of time till corrosion of the underlying sheet steel sets in.

Thin fiberglass panels can also not match the structural integrity of Deltas' seamless engineered plastic. Over time,

if that long, leaks can develop at the joints even with gaskets and caulking applied. Thin fiberglass when exposed

to the wide range of outdoor weather elements is also subject to delaminating, wicking and overall degradation.


Delta Cooling Towers, Inc, Premier ! Low Profile Induced Draft Cooling Tower Specifications, Page 4 of 5

B. Drift eliminator

Drift eliminator shall be three pass non-corrosive, polyvinyl chloride (PVC) corrugated

and bonded. Drift losses not to exceed .002% of water flow.

C. Water distribution

Totally enclosed, non-corrosive, polyvinyl chloride (PVC) pipe with large

orifice non-clog spray nozzle distribution system. Threaded nozzle orifices

shall be interchangeable allowing substitution of larger diameter orifice for

increased flow conditions without increasing inlet pressure.

D Wet decking

Rigid PVC film, corrugated and bonded for maximum cooling efficiency.

E. Fan assembly

F. Hardware

PART 3 EXECUTION

1. Fan propellers shall be adjustable pitch direct drive. Fan blades shall be

constructed of fiberglass reinforced polypropylene with aluminum silicon

alloy hub with stainless steel hardware. Statically and dynamically balanced

prior to shipping.

2. Fans and motors shall be supported by heavy gauge rolled steel ring. The

fan ring shall be coated with a premium Heresite for corrosion protection.

3. Motors shall be Direct Drive, Totally Enclosed, Energy Efficient, 1200

RPM, Inverter Rated, with Double Sealed Bearings, Corrosion Resistant

Mill & Chemical Duty Paint and designed for cooling tower duty.

4. Motor shall be provided with motor manufactures standard warranty.

5. Fan guard shall be coated steel mesh, 1/2" open area to allow air to pass

through with minimal pressure loss while protecting personnel from

contacting the rotating fan propeller.

Propeller type fan is attached to the shaft of the motor. The direct drive system

has a twofold benefit. First and foremost, there are no extra bearings, pulleys,

gear reducers or additional shafts to maintain or fail. The second benefit is the

higher efficiency gained by connecting the motor to the motor shaft, there are no

losses due to friction from bearings and gears, thus providing the highest

efficiency available.

All fasteners are 304 stainless steel. Anchor and lifting lugs are aluminum.

1. GENERAL - INSTALLATION


Installation of equipment shall be in conformance with the manufacturers

recommendations.

Delta Cooling Towers, Inc, Premier ! Low Profile Induced Draft Cooling Tower Specifications, Page 5 of 5

2. TESTING

A. Contractor shall perform all field testing and final adjustment of cooling tower

equipment in accordance with provision of manufacturer.

B. Contractor shall certify that all operation criteria are within normal operating range

as specified by the manufacturer.

C. Should any part of the cooling tower equipment fail to meet any specified

requirement, adjust, repair or replace any and all defects or inoperative parts

immediately with manufacturers recommended parts or procedures.


Premier

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax

Induced Draft, Counter Flow

Optional Accessories

ANTIFREEZE PACKAGE / RESISTANCE HEATING OPTION

The antifreeze package is supplied to provide protection against freezing of standing water in the cooling

tower sump due to shutdown during winter operation. The option is provided when draining the system

during periods of prolonged shutdown is not feasible, such as during weekends, or when a separate

gravity feed indoor storage tank is not part of the re-circulation system. Resistance heating of the sump

water provides protection, and this package includes the following components:

Immersion Heater:

Capacity sized for service ~ NEMA 4 enclosure ~ 2.5” threaded connection

TR-250 thru TR-350A 6000 watt – 2.5” thread

TR-350B thru TR-500 9000 watt – 2.5” thread

Thermostat Assembly:

Thermostat is to be set in field. Recommended setting is approximately 38°F.

NEMA 4 enclosure with SPDT switch ~ 30-130°F temperature range ~ 15A,

125-250-460 VAC with ¾” SCH 80 bulkhead fitting and a ¾” x ½” SCH 40 reducer

Liquid Level Switch Assembly:

NEMA 7 and 9 enclosures are standard on this SPDT level switch. This insures that the

heating element is submerged prior to energizing to prevent immersion heater burn cause

of low water level.

Heater Contactor:

NEMA 1 enclosure is standard. Open style for control panel mounting is available. This

contactor is mounted in the control panel when the panel is purchased from Delta.

PVC bulkhead fittings, for local installation, are included in component prices. Protection of external

piping by heat tracing and insulation is recommended but not included.

ANTIFREEZE PACKAGE / SOLENOID DRAIN VALVE

This option is utilized when freezing of standing water in the cooling tower sump could occur due to system

shutdown during winter operation. An electrically actuated valve will open when the pumps are not operating

and the temperatures approach freezing. The valve can be installed in the sump drain fitting of the tower (at

the factory) or remotely at the piping low point (by others in the field).

Components provided are:

A) Solenoid actuated to open, spring to close, 2-way valve, 1” line size, with NEMA 4 enclosure.

B) 1” PVC tee

C) 1” PVC plug

D) Temperature switch with bulkhead fitting

When power is removed the valve automatically reverts to the close position. This feature ensures freeze

protection even during a power outage.

BOTTOM OUTLET

The Bottom Outlet is a convenient option when gravity draining a cooling tower. This minimized the

amount of standing water in the sump of the cooling tower. A 125lb. Flanged fitting is provided.

Provisions must be made in the mounting platform for the fitting. Indoor storage tanks and other fittings

can be provided by Delta.


Premier

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax

Induced Draft, Counter Flow

Optional Accessories

CONTROL PANEL

A control panel is required any time there are electrical devices involved in a system. The standard

features of a Delta supplied control panel are:

A) NEMA 3R water tight enclosure

B) Single speed motor starter

C) 110V transformer with fuses

D) Blower operating lights

E) Blower selector switches

F) Terminal strips

G) 208V or 230V or 460V or 575V / 3Ph / 60Hz

Optional items available:

!" Disconnect switch: either fused, unfused or magnetic circuit breaker type.

!" Motor starter fuses or circuit breakers.

!" Additional motor starters, selector switches and lights to interface with existing systems,

remote pumps, etc.

!" Any other NEMA enclosure manufactured.

!" Pre-mounting of control panel and pre-wiring of skid mounted options with Liquid-Tite

conduit or EMT. (Consult factory for add pricing)

Delta also can provide programmable controllers, computer interfacing, telemetry, and any other type of

control system required. Pre-mounting and pre-wiring of the control panel for a system installation are

available. This minimizes the labor required for field installation.

EQUALIZER FITTINGS

This option is desirable for multiple module installations to provide equal liquid levels in the sumps of the

individual modules and allows for the installation of only one (1) water make-up line. Delta provides the

fittings installed in the cooling towers to provide for gravity flow from one tower sump to another. The

equalizer connection is not for full flow transfer (ex: pumping from one unit to another). The connecting

piping should be field installed and is the responsibility of others.

FAN ASSEMBLY COATING

The standard fan coating provided for the cooling tower fan ring is a cross linked epoxy-phenolic with an

alkaline curing agent and formulated to withstand a wide range of chemicals and for ease of handling.

This coating provides excellent chemical resistance to a wide range of acids, alkalies, solvent and water

solutions. When dry, the coating can withstand up to 400°F temperature. The fan ring steel surfaces are

sand blasted and a primer is applied prior to the final application. The fan guard has a powder coated

finish.

HIGH SUMP LEVEL SWITCH

The hump sump level switch option is utilized when a potential overflow must be avoided. Switch

elevation is set below the point when the water in the sump will overflow onto the ground.

The switch can be used to illuminate a light, shut off the influent feed pump or initiate some other device

or alarm. This package consists of a NEMA 7 and 9 liquid level switch mounted in a PVC bulkhead

fitting assembly with a 2” x 1” reducer bushing.


Premier

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax

Induced Draft, Counter Flow

Optional Accessories

LADDER

The ladder assembly facilitates access to the upper section of the cooling tower for inspection and

maintenance of the water distribution system and fan assembly as required. The assembly is fabricated of

aluminum for lightweight installation and has skid resistant rungs and landing platform. The landing

platform is specifically placed to maximize accessibility to the man-way located in the upper section of

the tower for easy access and servicing of components. The ladder conforms to all OSHA requirements.

In some cases the cage assembly may be required.

The ladder is attached to the tower via (4) bolted connections and two base mounting bolts. Ladder

extensions to grade are available for elevated installation platforms.

MOTOR SPACE HEATER

Fan Motor Space Heaters are recommended for installations where temperature variations can cause

excessive condensation within the motor. The Space Heater controls can be incorporated in our Control

Panel and would be designed for automatic and manual operation. While the motor is operating, the

heater remains off. When the motor shuts down, the heater is automatically energized during the off

cycle. The Control Panel would be designed with manual on/off control for intermittent cycles of

operation. Heaters are available for 115, 230, 460, or 550 volts, 3 phase, 60-cycle operation.

OUTLET STRAINER BASKET

This option is desirable to prevent debris that may have entered the cooling tower sump from getting into

the pump, or the rest of the cooling water system. This option is recommended to minimize particle size

that could foul chillers, heat exchangers, compressors or the cooling tower distribution laterals. A vortex

breaker pipe, which is provided as standard on pump suction applications, is included to maximize the

inlet area and prevent cavitation. The strainer is made from a vortex breaker pipe surrounded by 3/16” #2

PVC coated mesh screen. Finer mesh screens can be overlaid to minimize particle size. Consult Delta for

add prices and availability.

PLATFORM

The PREMIER cooling towers are shipped completely factory assembled, including the motor/fan

assemblies, and mounted on an integral support platform for ease of installation. The installation

platform is designed to retrofit other cooling tower designs for replacement where only “I” beams or other

forms of support exist. No field assembly is required. Simply locate the cooling tower, connect the

piping, hook up the electrical and start up the system. The steel platform is finished in a black air-dried

phenolic paint.

PUMP

The pump package is offered to provide single source responsibility of cooling tower equipment. The

size of the pump is determined by two factors:

A) Flow rate

B) Total dynamic head

The customer is responsible for supplying this information. The pumps come complete closed-coupled

with mechanical seals and ODP, 208/230/460V, 3 phase motor. TEFC motors are available.


Premier

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax

Induced Draft, Counter Flow

Optional Accessories

SAFETY CAGE

Complementary to the ladder option and is attached to the ladder at the factory for ease of field

installation. This assembly is attached directly to the cooling tower shell during installation. The safety

cage may or may not be required depending on OSHA specifications. The cage assembly is

manufactured of the same type of aluminum as the ladder.

STORAGE TANK

The tank is utilized when extra water capacity is required. Potential applications are for system modulation

when pumping flow rates vary, or for water storage. A hot/cold tank arrangement may be required in those

cases where the process hot water exceeds the maximum allowable inlet water temperature. The cooling

tower would flow more water than the process and the difference would be mixed with the hot water to reduce

its temperature. The tank and optional cover are fabricated of medium density polyethylene. All fittings are

Type 1 PVC.

THERMOSTATS – Single Stage and Two-Stage

The fan thermostat is important to minimize operating costs. The thermostat senses water temperature

and controls fan operation during cold weather service. When cold-water temperature drops below

design, the fan will shut off saving motor hp operating costs.

A single stage thermostat controls all fans on and off and is provided with standard single speed

motors.

A two-stage thermostat is required for two speed motor operation and controls the fan from ‘on’

to ‘half speed’ and then to ‘off’. At half speed operation the motor operates at only ¼ full load

BHP. Two stage thermostats must be wired to Delta specifications.

As the cold-water temperature rises and approaches the design temperature, the thermostat signals the fan

to start in order to maintain the cold water design temperature. The thermostat has a 5°F differential in its

operating range of 30°F to 130°F. The contacts are SPDT and have a 15 Amp UL rating. They are

complete with NEMA 4 enclosures suitable for outdoor mounting. The thermostat can be provided loose,

or installed in the cooling tower sump, or an indoor storage tank. When the thermostat is supplied with a

cooling tower or storage tank provided by Delta, the package includes installation with a ¾” Schedule 80

PVC bulkhead fitting and a ¾” x ½” Schedule 40 PVC reducer bushing. Thermostat operating range

must be set in the field. Recommended setting is approximately 70°F to 72°F, but will vary depending on

the application and the installation location.

TWO-SPEED FAN MOTOR

Two speed fan motors provide cold-water temperature control by means of airflow modulation, allowing for

design cold-water temperature at minimum operating cost. This is especially desirable for multiple module

applications. When provided with a two-stage thermostat, the motor can be reduced to half speed when cold

water sump temperature approaches design. The motor will shut off when the cold-water temperature falls

below design. Two-speed TEFC motors are provided for single voltage 3-phase operation only. Single-phase

dual voltage motors are not available.

NOTE: a ½ reduction in motor speed corresponds to ½ reduction airflow. At half speed operation,

only 1/8 BHP is consumed.


Premier

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax

Induced Draft, Counter Flow

Optional Accessories

UPPER SAFETY HANDRAIL SYSTEM

An optional safety handrail system is available to provide protection while on top of the cooling tower

inspecting or working on the mechanical equipment. When this option is provided, the man-way is located on

the top of the fan deck. This option is shipped pre-fabricated for assembly in the field.

VIBRATION CUTOUT SWITCH

The vibration cutout switch option is utilized to shut down the rotating mechanical fans in the event of

excessive vibration. Excessive vibration can be caused by worn or failed bearings, bent shaft or propeller

unbalance. This device helps prevent further potential damage by shutting the motor off. It is wired in series

with the motor starter coil and has dry contact rating of 10-ampere capacity at 120 VAC. Delta provides the

vibration cutout switch installed on the blower when ordered as a component of a new cooling tower or on a

replacement blower assembly.


Delta Cooling Towers, Inc.

Premier ! Cooling Tower"

Installation, Operation

& Maintenance Manual


Table of Contents

Delta Cooling Towers Principle of Cooling Towers………………..……………. 2

Cooling Tower Terms and Definitions…………………… 2

Water Treatment……..………………………….……….. 3

General Information Safety………………..………………………………….… 3

Approximate Weights………………..…………………… 4

Dimensions & Other Physical Data……..………...……… 4

Handling & Installation On-Site Inspection………………..………..…….….……. 5

Off Loading……..……………..………………………….. 5

Anchoring……..……….…………………………..……… 5

Tower Internals Pre-Check….…………………………….. 6

Electrical Wiring of Fan Motor & Accessories……..…….. 6

Location, Piping & Connections……..…….……….…….. 7

PVC Solvent Cementing Instructions………………...…… 7

Operation and Maintenance Safety in Operation of the Fan..…..………..…….….……. 8

Water Distribution System……..…………………………. 8

Fan & Mechanical Drive System….………………..…...… 9

Start-up Instructions………………………………..…….. 9

Water Level in Tower Sump…..……..…….……….…….. 10

Cold Weather Operation…………...………………...…… 10

Trouble-Shooting Guide.…………...……………….….… 13

Motor Trouble-Shooting Guide…………...………....…… 15

Other Information Cooling Tower Optional Accessories..…..…...….….……. 16

Recommended Replacement Parts……..…………………. 16

Preventative Maintenance Checklist….……………….….. 17

Warranty…………..………………………………..…….. 18

Important: Delta’s cooling towers have been designed to provide trouble-free service over an extended period of time. To obtain

the design performance, it is necessary that the cooling tower be installed, operated and maintained as prescribed in

these instructions.

Only persons possessing the skill and experience described herein should attempt to install this equipment. Prior to

installation, these instructions should be read carefully by the person who is to install the cooling tower to be

certain that its installation, operation and maintenance are thoroughly understood.

Questions regarding the installation, operation or maintenance of this equipment should be directed to Delta Cooling

Towers, Inc., Rockaway, New Jersey, (Telephone: 973/586-2201).

Step-by-step instructions contained in this brochure are based on normal installation conditions only. Abnormal or

unusual combinations of field conditions should be brought to the attention of Delta Cooling Towers or its

representative prior to installation of the equipment. The information contained herein is subject to change without

notice in the interest of product improvement.

1

Rev. 9/21/06


Delta Cooling Towers

Principle of Cooling Towers

All Cooling Towers operate on the principle of removing heat from water by evaporating a small portion of the

water that is recirculated through the unit.

The heat that is removed is called the latent heat of vaporization.

Each one pound of water that is evaporated removes approximately 1,000 BTU's in the form of latent heat.

Cooling Tower Terms and Definitions

BTU - A BTU is the heat energy required to raise the temperature of one pound of water one degree Fahrenheit

in the range from 32° F. to 212° F.

Cooling Range - The difference in temperature between the hot water entering the tower and the cold water

leaving the tower is the cooling range.

Approach - The difference between the temperature of the cold water leaving the tower and the wet-bulb

temperature of the air is known as the approach. Establishment of the approach fixes the operating temperature

of the tower and is a most important parameter in determining both tower size and cost.

Drift - The water entrained in the air flow and discharged to the atmosphere. Drift loss does not include water

lost by evaporation. Proper tower design and operation can minimize drift loss.

Heat Load - The amount of heat to be removed from the circulating water within the tower. Heat load is equal to

water circulation rate (gpm) times the cooling range times 500 and is expressed in BTU/hr. Heat load is also an

important parameter in determining tower size and cost.

Ton - An evaporative cooling ton is 15,000 BTU's per hour.

Wet-Bulb Temperature - The lowest temperature that water theoretically can reach by evaporation. Wet-Bulb

Temperature is an extremely important parameter in tower selection and design and should be measured by a

psychrometer.

Pumping Head - The pressure required to pump the water from the tower basin, through the entire system and

return to the top of the tower.

Make-Up - The amount of water required to replace normal losses caused by bleed-off, drift, and evaporation.

Bleed Off (Blowdown) - The circulating water in the tower which is discharged to waste to help keep the

dissolved solids concentration of the water below a maximum allowable limit. As a result of evaporation,

dissolved solids concentration will continually increase unless reduced by bleed off.

2


Water Treatment

#" The Delta Cooling Tower for the most fabricated of corrosion-resistant plastics which are resistant to water

treatment chemicals including common fungicides and bactericides.

#" Follow appropriate water treatment practices such as required and take frequent sample tests to avoid

possible water contamination. We also recommend water treatment maintenance as a measure of

protection for the environment in the vicinity of any cooling tower or other equipment open to atmosphere.

#" To determine the appropriate water treatment practices for your particular application, it is suggested that

you contact a water treatment firm for their recommendation. A list of water treatment firms is available for

your reference. It is not necessarily complete nor do we recommend a specific firm. The list will be mailed to

you on request or consult your local yellow pages.

#" Bleed-off also important to water quality. Evaporation of the recirculated water does not remove the

dissolved solids that are present in the water. Without bleed-off, the continual buildup of these solids will

impair the proper functioning of the piping and other equipment in the system.

#" A bleed line can be connected in any part of the system with routing to the sewer. Normally, it is most

desirable to make this connection in the hot water line at the cooling tower. A petcock type valve, installed in

the bleed line is recommended. Normally, bleed-off of 1% to 2% of the recirculation water flow is

satisfactory. The required amount of bleed-off water must be substituted with properly controlled amounts of

make-up water.

General Information

Safety

When handling, lifting, installing or operating the cooling tower, always employ safe work procedures, according

to best practices of the trade and according to applicable construction, electrical and safety standards,

regulations and codes.

Follow all safety practices described in these instructions.

3


Approximate Weights

The induced draft cooling towers are manufactured in two basic sections; a polyethylene tower body and

a fan assembly section. Both of these sections are factory assembled and shipped as a complete unit,

eliminating field assembly.

Overall

Approximate Weights (lbs.)

Dimensions

(inch)

Model # Shipping Operating W x L x H

$TR-205812

$TR-275812

$TR-210812

$TR-305812

$TR-375812

$TR-310812

Dimensions and Other Physical Data

3,900

3,980

4,100

6,050

6,170

6,350

4

7,990

8,140

8,300

11,960

12,150

12,430

101” x 180” x 131”

101” x 180” x 131”

101” x 180” x 131”

101” x 258” x 131”

101” x 258” x 131”

101” x 258” x 131”

For cooling tower dimensions, design for foundations, assembly and layout, refer to the following

drawings which are a part of these instructions:

Model # Title Drawing No.

$TR-205812, $TR-275812

&

$TR-210812

$TR-305812, $TR-375812,

$TR-310812

Assembly

Installation

Layout

Assembly

Installation

Layout

DT-D-86-930

DT-D-86-911

DT-D-86-913

DT-D-86-929

DT-D-86-912

DT-D-86-914


Handling and Installation of Your Premier% Cooling Tower

On -Site Inspection

Upon arrival at the job site, carefully inspect the shipment of any damage. If shipping damage has occurred,

notify the driver or the carrier immediately in writing of all damage. Check that all items listed on the Shipping

Bill of Lading have been received.

Offloading

The Premier% cooling towers are normally delivered to the site on a "30 inch high single drop deck" trailer. The

tower assembly is shipped with the steel mounting frame strapped down to the truck bed. Unload the tower

assembly complete with the mounting frame. (See Figure 1)

Lifting with crane:

#" Before lifting, inspect the mounting frame to tower connection making certain that the tower is secure,

adjust or tighten if necessary.

#" Use fabric slings of sufficient strength for better load distribution and protection of the plastic tower body.

Attach slings to lifting holes provided on the mounting frame.

#" Use spreader bars to minimize the crushing effect of slings on the tower or use adequate length straps

in order to maintain an angle of 60° or less between slings.

Offloading with fork truck:

#" A fork truck of sufficient capacity may be used for offloading. The forks should pass under the skid along

the width of the mounting frame with the tips of the fork extensions passing under the mid supports of

the mounting frame. A strap should be placed around the tower body and forks to secure the load.

#" Fork extensions (about 7 1/2 ft. long) are necessary tower skids.

Store tower assembly as shipped until the time of installation, in a secure location at the job site.

CAUTION: For extended lifts, use duplicate rigging as an additional safety precaution.

Anchoring

The foundation must be flat, smooth and rigid enough to be capable of independent support of the cooling tower

assembly and water load in the sump at it's maximum level. The tower assembly can also be mounted on Ibeams

or columns per installation drawings.

#" Four hold-down anchors are required for the small towers and six for the large tower.

#" Attachment hardware to tower mounting frame is by others.

#" Use anchor bolts sized for a minimum of 1,500 lbs. pull-out load for wind loading.

5


Tower Internals Precheck

Before piping-up and wiring the tower:

#" Check to be sure that all shipping material has been removed from the equipment.

#" The towers are fully assembled at the factory; but it is recommended that all joints and attachments be

checked over. Tighten or adjust as necessary.

#" Check the packing support to ensure that it did not shift during shipping or lifting.

CAUTION: As described earlier, when stepping on top of fill, distribute body weight by means

of two plywood plates.

Electrical Wiring of Fan Motor and Accessories

#" Installation of a vibration cut-out switch is recommended. (Refer to tower accessories available).

#" All electrical work should be performed only by qualified personnel and in accordance to prevailing electrical

codes, practices and safety standards.

#" The motor starter should be sized on voltage, nominal horsepower, and maximum full load current. This

current value can be found on the nameplate. If the starter cannot accept the maximum full load motor

current, the next size should be used.

#" Motor heaters should be selected on the basics of maximum full load current and service factors based on

the motor nameplate.

#" Standard "Cooling Tower Service" motors are supplied with a minimum of a 1.15 Service Factor.

#" Optional two speed motors are single winding variable torque.

#" Run flexible conduit with some slack from the motor conduit box to terminal box outside the tower where

rigid conduit can be used.

#" Conduit holding clip screws can be tapped directly into the tower wall. Use maximum 3/8" screws.

#" For the typical wiring schematic of fan motor and tower accessories, see Delta dwg. DT -B-78-001, included

with these instructions.

Location, Piping and Connections

#" Refer to the following drawings included with these instructions for recommended layout and pipe

connection information.

Model # Drawing No.

$TR-205812

$TR-275812

$TR-210812

$TR-305812

$TR-375812

$TR-310812

6

DT-D-86-930/ DT-D-86-913

DT-D-86-929/ DT-D-86-914

#" Piping should be adequately sized in accordance with accepted standard practices.

#" Gravity drain to indoor storage sump requires proper head differential and piping design considerations.

Allowance must be made for flow, pipe size, piping layout and distance of cooling tower from the indoor

storage sump.

#" On multiple tower installations, valving and/or pipe sizing should balance pressure drops to provide equal

inlet pressures. Equalizing lines can be installed between cooling tower sumps and are available as an option


from the factory. Each tower should be valved separately to allow for flow balancing or isolation from

service.

#" Prior to start-up check that the PVC locknuts on all bulkhead fittings are properly tightened to prevent

nuisance leaks. A chain wrench can be used to check and tighten the locknuts.

#" Check that the SS hexagonal nuts on the inlet and outlet PVC socket flanges are properly tightened to

prevent nuisance leaks. While tightening the nuts, do not allow the bolt to rotate. This could damage the

rubber seal under the flat washer on the bolt head located inside the cooling tower.

#" All supply and return piping must be independently supported.

PVC Solvent Cementing Instructions

The following procedure is recommended for the preparation and cementing of internal and external piping for

Delta Cooling Towers:

#" Cut ends of pipe square using a handsaw and miter box. Tube cutters with wheels designed for use with PVC

are acceptable, providing they do not leave a raised bead on the outside diameter of the pipe.

#" Use a chamfering tool or file to put a 10° to 15° chamfer on the end of the pipe. Lightly sand the area to be

cemented to remove gloss. Using a clean rag, wipe pipe surface and fitting socket to remove dirt, moisture

and grease. Acetone or similar solvent is recommended for cleaning.

#" “Check " dry fit" of pipe and fitting by inserting pipe at least 1/3 of the way into the fitting. Position pipe and

fitting to assure alignment. Pipe and fitting should be at same temperature condition.

#" Using a clean, natural bristle brush about 1/2 the size of the pipe diameter, apply a primer to the fitting

socket. Apply primer with a scrubbing motion until the surface is penetrated. Primer should never be applied

with a rag. Repeated applications may be necessary to achieve the desired dissolving action. In the same

manner, apply primer to the pipe surface equal to the depth of the fitting socket, making sure the surface is

well penetrated. Reapply primer to the fitting socket to make sure it is still wet.

#" While both surfaces are still wet with primer, use a clean brush to apply a liberal coat of solvent cement to

the male end of the pipe. The amount should be more than sufficient to fill any gap. Next apply a light coat

of solvent cement to the inside of the socket, using straight outward strokes to keep excess cement out of the

socket.

#" While both surfaces are still wet with solvent cement, insert the pipe into the socket with a quarter-turn

twisting motion. The pipe must be inserted the full length of the socket. The application of solvent cement to

pipe and fitting, and the insertion of the pipe into the fitting, should be completed in less than one minute. If

necessary, two persons should apply solvent cement to the pipe and fitting simultaneously.

#" Hold the joint together for approximately 30 seconds until both surfaces are firmly gripped. After assembly,

a properly made joint will usually show a bead of cement around its entire perimeter. This should be brushed

off. It is recommended that the joint be allowed to cure for 24 hours before pressure testing or operation.

7


Operation and Maintenance of Your Premier% Cooling Tower

Safety in Operation of the Fan

NEVER operate the fan when the access panel or the entire fan guard is removed.

NEVER remove access manhole cover while fan is in operation.

NEVER operate fan when any work, access, maintenance, trouble-shooting, etc. is being performed on the

inside of the fan ring assembly or inside the tower plenum.

#" Normally, electrical codes dictate a disconnect box at the cooling tower.

#" The handle of the disconnect box must be locked in the off position and an OSHA DANGER tag (DO

NOT OPERATE) must be attached to handle securely.

Note: Removing fuses from the disconnect box may provide further assurance, but only when done by qualified

personnel.

The foregoing precautions apply when any type of internal access to the tower is required, including the

following examples:

#" Checking, maintenance or replacement of any fan assembly component.

#" Checking, maintenance or replacement of the water distribution system inside the tower.

#" Cleaning of the fill.

#" Any work that necessitates removal of any access door, the fan guard or the manhole cover.

Water Distribution System

Water distribution is accomplished by a low pressure, non-rotating, spray nozzle system

designed to accommodate the specified flow rate.

IMPORTANT:

#" The flow rate of the cooling tower must be as close to the design gpm as possible. The water

distribution system’s spray nozzles are provided for the design flow condition. Underpumping

or over-pumping will cause the cooling tower to perform inefficiently.

#" Design pressure at the inlet connection must be maintained for proper water distribution.

If the pressure is less or greater than the design, proper water dispersion over the internal wet

decking will be impaired. If inlet pressure is low, water spray will not cover the entire wet

decking surface. This causes channeling of air, and does not make maximum use of the heat

transfer media. High inlet pressures will cause the water to over-spray the wet decking

media, hit the internal side walls of the tower shell and drop in a vertical flow along the shell

walls without the opportunity for water / air contact through the heat exchange media.

Excessive high spray pressure may also cause wet decking fatigue and damage.

#" The operating inlet pressure should be 4.0 to 5.5 psi at the tower inlet.

#" The maximum operating inlet water temperature should not exceed 140° F unless noted

otherwise.

8


CAUTION:

When stepping on top of the fill, distribute the body weight by means of two plywood plates as

described earlier in these instructions.

Fan and Mechanical Drive System and Its Maintenance

Safety

Follow all safety instructions previously discussed.

Motor:

#" The standard motor is a totally enclosed motor with extra moisture protection on the

windings, Class F insulation, 1.15 minimum service factor, epoxy coating on outside frame,

and is specifically designed for cooling tower duty to the exclusive specifications of Delta

Cooling Towers.

#" Should there be a problem with the motor, which may be covered under our standard

warranty, the motor must only be inspected and serviced by an authorized agent of Delta

Cooling Towers, otherwise the warranty is void.

#" If the motor bearings have grease fittings, follow the lubrication recommendations as

outlined in instructions from motor manufacturer. The majority of motors do not require

greasing.

Start-up Instructions

Complete all start-up instructions before applying heat load.

#" Clean any accumulated debris or packaging material from inside tower sump.

#" Check to be sure that the fan motor is properly wired for correct rotation as viewed from the

top of the fan. Reverse leads will cause incorrect rotation and reverse direction of airflow.

Note: Fan rotation should always agree with rotation labels. Standard fan rotation is

clockwise, (C.W.) however; non-standard fans may be designed to rotate counter

clockwise, (C.C.W.)

#" Check for free rotation of the fan and fan blade tip clearance.

#" Fill the cooling tower sump or the cold water storage reservoir on gravity drain applications.

#" Water recirculation pump should be primed and all piping below the tower sump filled with

water. Check pump for proper shaft rotation.

#" Start water recirculation pump and adjust flow to design. A flow metering device installed in

the inlet is recommended but if not available, use the pressure differential across the pump in

conjunction with the pump curve.

#" Check spray pattern from nozzles to be sure there is no clogging. Remove drift eliminators

for nozzle inspection, then return to proper position.

9


#" Start up fan motor and check amperage and voltage against motor nameplate data.

#" The standard make-up valve assembly is shipped with the plastic float ball strapped against

the tower side to prevent damage. To set the ball for proper operation, loosen the screw in the

fulcrum arm, lift or depress the arm with the plunger pressed against the valve seat and

tighten. Repeat until the proper operating level is obtained (Refer to operating level table

below). It is recommended that a shut-off valve be installed in the make-up line.

#" After 24 hours of operation:

!" Check spray nozzles for clogging.

!" Check tower sump water level.

Water Level in Tower Sump

#" When the cooling tower is being operated with pump-suction, the make-up valve assembly

with float ball should be adjusted to set the water operating level as follows:

Tower Model # Operating level (from

bottom of sump)

All Towers

Access the make-up valve through the access louver panel.

10

Between 10-12 inches

#" A lower water level than recommended may cause air to be drawn into the tower outlet

piping and cause pump "cavitation."

#" A water level higher than recommended will cause continuous overflow and waste of water

as a result of potential “pull-down” from the piping when the system is shut down.

#" The overflow should NEVER be capped, or its elevation altered by raising external piping.

Note: On gravity drain cooling tower(s), make-up assembly, overflow, drain and vortex breaker

are not provided.

Cold Weather Operation

Cold Weather Protection

The cooling tower may require protection against freezing at light heat loads when the wet-bulb

temperature is under 32°F., or during shutdown when the temperature drops below 32°F.

The following methods are recommended for use in Delta Cooling towers for protection during

cold weather conditions. Recommended equipment is optional and may be ordered from the

factory. Consult the factory for further information on which equipment to choose for your

specific application.


Separate Indoor Sump

This method is virtually foolproof antifreeze protection system with the added advantage of

minimum maintenance. The indoor sump tank should be large enough to fill the entire

recirculation system without danger of pump cavitation. As a general rule, the tank should be

sized to hold three times the rate of circulation in gallons per minute (gpm).

The tank should be provided with properly sized overflow, make-up drain and suction

connections. When a separate sump is ordered with a cooling tower, the water make-up valve

assembly and the overflow and drain connections are installed in the indoor sump only.

When a sump tank is used, the cooling tower should be located high enough above it to allow

free cold water gravity drain. A bottom outlet can be provided for gravity drain to indoor sump

tank installations.

Reverse siphoning is a back flow of non-potable, recirculating water into a potable water

system, which can occur through the make-up float valve assembly located in the water

reservoir. Should the valve malfunction, blockage of the overflow or outlet lines would cause

water level to rise in the reservoir, and the make-up water pressure could drop below the

atmospheric pressure creating a vacuum at the make-up inlet. Although precautions to

prevent reverse siphoning are incorporated in the cooling tower design, we also recommend

installing a check valve in the water make-up supply line, as a backup precaution.

Electric Immersion Heater

Cooling towers ordered with antifreeze systems are shipped with a protective seat secured under

the immersion heater probe, which must remain in place during operation to protect the

polyethylene shell from the heater element.

Note: This seat is not a shipping brace and must not be removed.

Thermostatic On/Off Control

A thermostatically controlled fan for on/off operation, should be considered as an energy saving

feature, for capacity control during winter operation. The thermostatic control can be field set to

insure automatic fan shut-down when cold water drops below design temperatures, as well as fan

start-up when cold water rises to design temperature.

A thermostatic control provides excellent cooling tower anti-freeze protection while reducing

operating costs throughout cold weather operation.

PVC Distribution System

To prevent damage to the PVC distribution system during cold weather shut-down, install an

automatic or manual drain line from the hot water inlet piping as close to the cooling tower inlet

as possible. The entire inlet and distribution system must be drained for shut-down in subfreezing

weather.

11


Piping

When the cooling tower is located outdoors, adequate measures including the use of heating

tapes and insulation should be considered to protect water lines from freezing.

Operation at Sub-freezing Ambients

See Thermostatic On/Off control

To prevent ice formation, insure that tower operates at maximum possible heat load.

If tower is equipped with two speed motors, operate at low speed to increase leaving water

temperature.

On multi-cell installations, it may also be necessary to cycle fan(s) periodically to prevent ice

formation on the intake louvers and the wet decking. If fan(s) are operated in reverse, DO NOT

operate in reverse any longer than is necessary. Extended reverse operation can cause ice to form

on the fan blades causing an out-of-balance condition. A vibration cut-out switch is always

recommended.

The importance of frequent visual inspections and routine maintenance during sub-freezing

operation is very important and should not be overlooked.

12


Trouble-Shooting Guide For Premier%

Induced Draft Cooling Towers

Problem Possible Causes Corrective Actions

Increase in the leaving water

temperature

Drop in the water flow rate.

Low water flow rate

1. Excess water flow; over pumping.

2. Recirculation of hot discharge air, back into

the cooling tower air intakes. Obstructed air

intakes

3. Proximity of other heat source or discharge

of moist air.

4. Improper operation of spray system.

A. Orifices clogged.

B. Actual water flow is lower than design

sprinkler rating.

5. Clogged fill.

6. Damaged fill.

7. Additional heat load on system.

8. Wet-bulb temperature higher than design.

1. Blockage of spray nozzle orifices.

2. Low water level in sump causing air to be

drawn into pump and piping.

3. Improper selection of water circulating

pump.

4. Blockage of strainers.

5. Pump malfunction.

Noise and vibration 1. Loose bolts.

2. Mechanical interference of rotating parts.

Sudden or short term irregularities of

cold water level in basin

Excessively high water level in sump on

gravity drain installation

3. Fan propeller damaged or out of balance.

4. Air intake at pump.

5. Pump cavitation.

6. Damaged motor bearings.

1. Peculiarities of specific system and its

operation.

1. Gravity flow restrictions due to insufficient

head differential.

1. Adjust to the design flow.

2. Eliminate obstructions which impede air discharge.

For proper location of cooling tower(s), see Delta

dwgs. Baffle air discharge, if necessary.

3. Remove source or relocate tower.

4. See water distribution system instructions.

A. Flush spray nozzles, clean orifices, clean

system, install outlet strainer.

B. Install properly rated spray nozzles or increase

to design flow.

5. Clean the fill.

6. Replace the fill.

7. Contact Delta for possible upgrade or addition of

another cooling tower selected for additional load.

8. None required if condition is temporary. Otherwise

consult Factory for upgrade.

1. Flush spray nozzle. Clean whole system. Install

outlet strainer.

2. Adjust float valves. Be sure the system is flooded

and balanced.

3. Replace with proper size pump designed for flow

and head requirements. Check pump “Net positive

suction head.”

4. Backwash or clean.

5. Consult pump specialist.

1. Recheck and tighten all bolts to specified torque.

2. Inspect propeller for free rotation. Check propeller

for mechanical interference. Adjust, repair or

replace, as necessary.

3. Replace components, as necessary and check

balance. Install vibration cut-out switch.

4. Check basin water level and irregular piping design.

5. Match pump NPSH with system hydraulics.

6. Check and replace motor.

1. Inspect system and review operation procedures.

Correct, as applicable valve settings, loss of water in

system, fill system to flooded capacity.

1.

A. Outlet piping should terminate below sump tank

water level.

B. Increase discharge pipe size.

C. Increase head by mean other than A.


Problem Possible Causes Corrective Actions

Excessively high water level in tower basin

on closed loop system installations

Uneven water level in tower basins of multicell

installations

2. Airlock.

3. Unnecessary obstruction of waterflow

(i.e., partially closed valve).

4. Undersized piping.

5. Horizontal pipe run too long.

6. Improper hydraulic pipe design.

7. Outlet vortex breaker provided.

1. Make-up valve float set too high.

2. Valve or float damaged or

malfunctioning.

3. Make-up water pressure too high.

1. Unbalanced system hydraulics.

2. More than one make-up valve

operating, and set for different water

levels.

Excessive water carry over (drift) 1. Surfaces of top layer of fill damaged

causing “pooling” of water.

2. Eliminator(s) not in place.

3. Damaged eliminator.

4. Excess water flow.

Premature or excessive corrosion of fan

drive components

5. Orifices in spray nozzles clogged

causing improper water dispersement.

6. Blockage of fill.

1. Excessive drift.

2. Presence of corrosive chemicals in air

or water that was not known at time of

supply.

2. Install an air bleed valve at highest point

of piping, usually at a vertical angle.

3. Remove obstruction.

4. Increase pipe size.

5. Shorten, if possible.

6. Correct design.

7. Remove vortex breaker.

1. Readjust float arm.

2. Repair or replace.

3. Reduce pressure or contact Delta for

alternate solutions.

1. A. Install equalizer line with isolation

valves between modules.

B. Adjust inlet water flow to insure equal

distribution to each cooling tower

module.

C. Review outlet header hydraulics and

correct piping design, if applicable.

D. Contact Delta for assistance.

2. A. Adjust float level settings relative

To one another.

B. Shut-off and or/throttle flow to

one or more valves.

C. Installation of equalizers is

highly recommended.

1. Replace top layer. Protect fill when working

inside tower.

2. Reinstall.

3. Replace.

4. Reduce water flow or install spray nozzles

designed for the actual operating flow.

5. Install outlet strainer. Clean whole system

and spray nozzles.

6. Clean fill.

1. See “ Excessive Water Carry Over (Drift)”

above.

2. Remove source of corrosion or contact Delta

for alternative materials, premium coatings

or other precautions.


Motor Trouble Shooting Guide (General)

Problem Possible Causes Corrective Actions

High current draw (all 3 phases) 1. Low line voltage (5 to 10% lower

than nameplate).

2. 200V motor on 230/240V system.

3. 230V motor on 208V system.

4. Incorrect propeller.

5. Incorrect pitch if adjustable

Low motor current draw 1. Incorrect propeller.

Unbalanced current

(5% from average)

Excessive voltage drop

(2 or 3% of supply voltage)

2. Incorrect pitch if adjustable.

1. Unbalanced line voltage due to:

A. Power supply.

B. Unbalance system loading.

C. High resistance connection.

D. Undersized supply lines.

2. Defective Motor.

Overload relays tripping 1. Overload.

1. Inadequate power supply.

2. Undersized supply lines.

3. High resistance connections.

2. Unbalanced input current.

3. Single phasing.

4. Excessive voltage drop.

5. Frequent starting or intermittent

overloading.

6. High ambient starter temperature.

7. Wrong size relays.

8. Improper overload settings of

adjustable relays.

Motor runs very hot 1. Overloaded.

2. Blocked ventilation.

3. High ambient temperature.

4. Unbalanced input current.

5. Single phased.

Motor will not start 1. Single phased.

2. Rotor or bearings locked.

Excessive vibration (Mechanical)

Out of balance

1. Motor mounting.

2. Motor.

1. Consult power company.

2. Change to 230V motor.

3. Change to 200V or 280V motor.

4. Consult factory.

5. Reduce pitch / consult factory

1. Consult factory

2. Increase pitch / consult factory

1. Consult power company and/or

electrician.

2. Replace motor.

1. Consult power company.

2. Increase line sizes.

3. Check motor leads and other

connections.

1. Reduce load on motor or increase

motor size.

2. Balance supply voltage.

3. Eliminate.

4. Eliminate (see above).

5. Reduce frequency of starting and

overloading or increase motor size.

6. Reduce ambient temperature.

7. Correct size per nameplate current

and service factor.

8. Readjust to motor FL Amps x S.F.

1. Reduce overload.

2. Fouled fill or air restriction.

3. Reduce ambient temperature.

4. Balanced supply voltage.

5. Eliminate.

1. Shut power off – eliminate.

2. Shut power off – check shaft

rotation.

1. Check to be sure motor mounting

hardware is tight.

2. Replace motor.

Note: Consult Warranty page prior to replacing or repairing any cooling tower components. Delta recommendation and

consent to remedy material and workmanship defects is necessary, to avoid breach of Warranty.


Premier % Optional Accessories

Premier % Optional Accessories Available

!" Aluminum Ladder(s) with a step platform and railing at the fan elevation custom designed for the cooling

tower.

!" Safety cage(s).

!" Two speed motor(s) designed for cooling tower duty to the exclusive specifications of Delta Cooling

Towers.

!" Vibration cut-out switch provides for fan motor circuit disconnect for shutdown protection should

abnormal fan vibration develop during service. Installation of vibration cut-out switches are

recommended as good design practice.

!" Thermostat on/off control of fan operation through sensing the temperature of water leaving the tower.

!" Basin anti-freeze system for cold weather operation.

!" Custom designed top platform with handrails.

!" Pre-wired control panels.

!" Elevated mounting frame structures.

!" Pumps

!" Polyethylene Sump tanks up to 10,000 gallons for indoor installation for anti-freeze protection during

winter operation.

!" Motor space heaters are recommended for unusually high relative humidity conditions where extreme day

to night temperatures can cause excessive condensation in the motor, when in operation during this period.

!" Plastic outlet sump strainer.

!" Plastic equalizer fittings.

!" Variable frequency drive on fan motors, controlled by temperature controller.

!" High sump level switch

!" Automatic drain valve

Consult factory or a Delta representative for further information and an updated list of accessories.

Premier % Recommended Replacement Parts

To avoid costly cooling tower downtime, the following replacement parts should be carried in inventory at the

installation site:

!" Make-up float, or complete make-up valve assembly.

!" Fan Motor.

!" Complete set of spare spray nozzles.

When ordering, include model number and serial number of the cooling tower as it appears on the tower

nameplate. Under normal conditions, shipment of factory replacement parts is made within one day after the

order is received. Spare pumps and pump parts, as well as control panel components, such as fuses and heaters

for magnetic starters, are also available.


Preventative Maintenance Checklist

Procedure Monthly Every

3 Months

Inspect General Condition of cooling tower.

Check Water Level in cold water basin.

Adjust if needed.

Check float ball & Make-up Valve for

proper operation.

Check Line Voltage, Motor Amperage, and

Water Pressure.

Clean Sump Strainers, if installed.

Lubricate Motor Bearing, (if motor has

fittings for greasing. The majority of motors

require no external greasing). Use Proper

Lubricants. Increase frequency, as necessary

depending on conditions of service.

Check for obstructed Water Flow Through

Orifices. Clean and flush sprinkler lateral

arms, as required.

Check All Bolts which can cause unbalance

and vibration and tighten specified torque.

Check Condition of Water for proper

treatment to prevent build-up of algae and

solids concentration

Clean and flush Cold Water Sump

&

&

&

&

&

&

&

&

&

Every

6 months

&


DELTA

Cooling Towers, Inc.

TM Series ® cooling towers

are induced draft counter flow

design cooling towers with

single module capacities from

250 to 2,000 cooling tons. These

towers are a modular design that

Delta has been manufacturing

since 2001 and have been very

well received in both commercial

and industrial applications.

TM SERIES

Induced Draft, Counter Flow Design

250 - 2,000 Ton Single Modules

STANDARD FEATURES:

��Seamless Engineered Plastic (HPDE) Shell

��Corrosion Proof Construction

��Seamless Sloped Sump with Integrally Molded I-beam Pockets

��Direct Drive Fan System with Totally Enclosed Motor

��Factory Assembled for Simple Installation

��15 Year Shell Warranty

��PVC Water Distribution System with Non-clog Large Orifice

Removable Nozzles

��High Efficiency PVC Fill

��Made in the USA

Compare the value Delta Cooling Towers offer against the

value of other comparable units. You will find the benefits we

can provide are unique and superior:

��Energy Efficiency - low fan HP from optimized cooling

counterflow design, low pump head.

��Non-Corrosive Materials of Construction - impervious to

chemicals, acids, and salts.

��Cost Less to Maintain - will not rust, chip, or ever require

painting for extraordinary tower life.

��Unique Design - provides unlimited flexibility of modular

operation, future upgrade capability, and location convenience.

��One-Piece Construction - strong and long lasting. Shell is

backed by a 15 year warranty.

��Cost Less to Install - light weight construction reduces rigging

and structural roof support requirements. Maintenance costs

and water treatment chemicals cost are significantly lowered.

OPTIONS AVAILABLE:

��Two Speed Motors

��Thermostatic On/Off Fan Control Package

��Anti Freeze Basin Heaters

��Pump(s)

��Sump Level Switches

��Stainless Steel Basket Strainers

��Control Panels

��Storage Tanks

Phone: 973-227-0300 • 800-BUY-DELTA • Fax: 973-227-0458 • www.deltacooling.com


DELTA

Cooling Towers, Inc.

DIRECT DRIVE

AIR MOVING

SYSTEM

Totally enclosed cooling

tower motors power

multiple fiber-reinforced

polypropylene axial

propeller fans within

polyethylene velocity

recovery stack.

LIGHTWEIGHT

AND

DOUBLE-WALL

Plastic is lighter than

conventional cooling

towers and integrated

double-wall is more than

10 times the average wall

thickness of metal towers.



FILL MATERIAL

High efficiency PVC

cellular design for

maximum cooling.


LEAK-PROOF

SUMP

Molded as Unitary

(One-Piece) Structure

that has no joints to

leak or require recaulking

and sealing.

TM SERIES

Induced Draft, Counter Flow Design

250 - 2,000 Ton Single Modules


Model Approximate Weight Dimensions Capacity Fan Motor Sump Capacity

Group Shipping Operating L x W x Ht. Tons HP Gallons

1 Cell 5020 10670 16.5' x 8.5' x 15.5' 250-425 10-30 480

2 Cell 10040 21340 16.5' x 17.0' x 15.5' 460-820 20-60 960

3 Cell 15060 32010 16.5' x 25.5' x 16.5' 700-1200 30-90 1400

4 Cell 20080 42680 16.5' x 34.0' x 16.5' 910-1580 40-120 1920

5 Cell 25100 53350 16.5' x 42.5' x 16.5' 1120-1710 50-120 2400

6 Cell 30120 64020 16.5' x 51.0' x 16.5' 1340-2020 60-120 2880

The information, recommendations and opinions set forth herein are offered solely for your consideration, inquiry and verification, and are not,

in part or total, to be construed as constituting a warranty or representation for which we assume legal responsibility.

Delta Cooling Towers

Leader in Non-Corrosive Cooling Tower Technology

Tel: 973-227-0300 • Fax: 973-227-0458 • 800-BUY-DELTA • www.deltacooling.com


SELF

SUPPORTING

PLASTIC BASE

Tower can be set on flat

surface or on I-Beams

placed in Integrally-

Molded I-Beam Pockets

for elevated installations.

NOZZLE WATER

DISTRIBUTION

SYSTEM

Non-Clog large orifice

removable nozzles evenly

distribute the water.




CORROSION-

PROOF SHELL

HDPE Plastic

Construction can not

corrode and is backed

by 15 Year Warranty.

DRIFT

ELIMINATOR

Three pass PVC drift

eliminator prevents water

droplets from leaving the

tower.

INDEPENDENT

CELL

CAPABILITY

Independent Cells allow

isolation of cells for

operational flexibility.


Delta Cooling Towers, Inc.

41 Pine Street

P.O. Box 315

Rockaway, New Jersey 07866-0315

Telephone 973.586.2201

Fax 973.586.2243

www.deltacooling.com

sales@deltacooling.com

TM Series ! Induced Draft Cooling Tower Specifications

The TM Series" cooling towers are induced draft counter-flow cooling towers with

single module capacities from 250 to 2020 cooling tons. These towers are a modular

design that Delta Cooling Towers introduced in 2001 and have been very well received

in both commercial and industrial applications. There are three overriding principles

that make TM Series" cooling towers an excellent selection.

The towers are corrosion-proof not corrosion-protected which is an important distinction

of Delta towers. Cooling towers are outdoor equipment, either on roofs or sides of

buildings, and are subjected to weather extremes continuously. Delta towers are

manufactured in a seamless engineered plastic (HDPE) structural shell which is

corrosion-proof and will not rust, chip, peel, crack or ever need painting or additional

protective coatings. Comparably priced towers are often sheet metal with a galvanized

coating. Zinc galvanizing provides only an interim protection against corrosion. This

galvanizing wears away, often unevenly, exposing sheet metal to the rapid corrosive

environment of cooling tower duty.

The second principle of Delta towers is the engineering that led to a simplicity of design,

translating into reliability and a trouble-free life of the towers. From the seamless

cooling tower shell to the direct drive fan assembly, there are less overall components

and systems within the tower to maintain. The towers are shipped factory complete with

little more installation steps than hooking up the electrical and water. This design

simplicity is recognized in many other industries as a key goal and leads to greater

reliability and owner peace of mind.

Finally, the TM Series" Induced Draft Cooling Towers are a high efficiency design

which translates to very low energy costs to operate the towers. The design of the

towers and the proprietary high efficiency fill material lead to this energy efficiency. The

minimal operating costs, a track record of superior reliability and corrosion proof

materials of construction makes the TM Series" Induced Draft Cooling Tower the

choice for cooling tower applications over 250 cooling tons.


Delta Cooling Towers, Inc, TM Series ! Induced Draft Cooling Tower Specifications, Page 2 of 5

PART 1 GENERAL

1.1 SCOPE

TM SERIES ! INDUCED DRAFT COOLING TOWER

Work included to furnish and install Delta Cooling Tower model TM-_________

consisting of all equipment necessary to provide a complete operating system to

remove specified heat load. Cooling towers shall be packaged, factory

pre-assembled to the fullest extent possible, induced draft, counter flow design

1.2 RELATED WORK

{insert related work document here}

1.3 REFERENCES - STANDARDS

AMCA - Air Moving and Conditioning Association

ASTM - American Society for Testing and Materials

ANSI - American National Standards Institute

ASME - American Society of Mechanical Engineers

1.4 QUALIFICATIONS

The cooling tower shall be manufactured by a company with at least 30 years

experience manufacturer of seamless engineered polyethylene cooling tower

systems.

1.5 WARRANTY

Shell shall be warranted for 15 years and all other equipment shall be warranted

for one year against material and workmanship defects from date of shipment.

1.6 SUBMITTALS

Shop drawings shall be provided and shall include but not be limited to:

A. System dimension

B. Operating and dry weight

C. Details of equipment

D. Mounting and support requirements

E. Descriptions and specifications


Delta Cooling Towers, Inc, TM Series ! Induced Draft Cooling Tower Specifications, Page 3 of 5

PART 2 PRODUCT

The cooling tower specified shall be factory assembled to the fullest extent

possible.

2.1 Induced Draft Cooling Tower, Model TM-________, _____ tons capacity,

_____GPM, ____ #F hot water temperature, ____ #F cold water temperature,

____ #F wet bulb temperature

A. Cooling tower

1. Shell shall be seamless, double wall, non-corrosive, hi-impact high

density polyethylene (HDPE) of leak proof design. Conical transition

for motor/fan assembly with separate polyethylene velocity recovery

stacks. The shell shall exceed 1/4" average thickness. The structural

shell shall be capable of withstanding water temperatures up to 160#F

on a continual basis.

2. Sump shall be seamless, double wall, non-corrosive, hi-impact high

density polyethylene (HDPE) of leak proof design. Sump will have

I-Beam support pockets allowing placement on elevated I-Beams.

Integral support posts 360# around sump give support to upper tower

section and allow mounting of removable louvered air inlet panels for

optimum air distribution.

3. Cooling tower structural shell & sump shall be guaranteed against

corrosion for 15 years.

4. Cooling towers performance to be certified by CTI (Cooling Technology

Institute) under CTI Standard-201.

5. Removable PVC louver panel located between sump support post for

accessibility to automatic make-up valve and adjustable float.

6. PVC fittings shall be provided for inlet, outlet, overflow, drain and make

up.

7. Outlet fitting for pump suction applications shall be provided with a vortex

breaker.

8. Make up assembly shall be incorporated in the sump of the cooling tower.

It shall be a mechanical valve assembly, adjustable height for varying

operating condition.


Delta Cooling Towers, Inc, TM Series ! Induced Draft Cooling Tower Specifications, Page 4 of 5

The engineered plastic shell is the optimum material for cooling tower construction. The material is molded into a

totally seamless shell, which will never leak, unlike conventional cooling towers which require many panels, joints,

seams, seam gaskets, caulking and hundreds of bolts or other fasteners to maintain the integrity of the product. The

Delta structural shell will never rust, chip, crack or ever need painting or further protective coatings. The structural

shell is warranted for 15 years which is much longer than other available cooling towers

Galvanized steel towers provide only interim corrosion protection. The zinc galvanizing is designed only to delay

corrosion as the zinc wears steadily away. Moderately high temperatures and various water chemical treatments

speed up this leaching of zinc into the water or atmosphere. With only ounces per square foot of corrosion

protection, it is only a matter of time till corrosion of the underlying sheet steel sets in.

Thin fiberglass panels can also not match the structural integrity of Deltas' seamless engineered plastic. Over time,

if that long, leaks can develop at the joints even with gaskets and caulking applied. Thin fiberglass when exposed

to the wide range of outdoor weather elements is also subject to delaminating, wicking and overall degradation.

B. Water distribution

Totally enclosed, non-corrosive, polyvinyl chloride (PVC) pipe with large

orifice non-clog spray nozzle distribution system. Threaded nozzle orifices

shall be interchangeable allowing substitution of larger diameter orifice for

increased flow conditions without increasing inlet pressure.

C. Wet decking

Rigid PVC film, corrugated and bonded for maximum cooling efficiency.

D. Drift eliminator

Drift eliminator shall be three pass non-corrosive, polyvinyl chloride (PVC)

corrugated and bonded, one-piece, with non-corrosive PVC straps for easy

removal for internal inspection and maintenance.

E. Fan Assembly

1. Fan propellers shall be adjustable pitch direct drive. Fan blades shall

be constructed of fiberglass reinforced polypropylene with aluminum

silicon alloy hub and stainless steel hardware. Statically and

dynamically balanced prior to shipping.

2. Fans and motors shall be supported by heavy gauge angled steel ring.

The fan ring shall be coated with a premium Heresite for corrosion

protection.


Delta Cooling Towers, Inc, TM Series ! Induced Draft Cooling Tower Specifications, Page 5 of 5

3. Motor shall be Totally Enclosed Air Over, Direct Drive, 900 RPM, Class

F insulation, with 1.15 minimum service factor and specifically

designed for cooling tower duty.

4. Motor shall be warranted against defects in materials and

workmanship under motor manufactures warranty.

5. Fan guards shall be mounted to top of velocity recovery stacks.

Guards shall be coated steel mesh, with 2 ¾” open area to allow air to

pass through with minimum pressure loss while protecting personnel

from contacting the rotating fan propeller.

F. Hardware

PART 3 EXECUTION

All fasteners are 304 stainless steel. Anchoring lugs are Heresite coated

steel.

1. GENERAL - INSTALLATION

Installation of equipment shall be in conformance with the manufacturers

recommendations.

2. TESTING

Propeller type fan is attached to the shaft of the motor. The direct drive system

has a twofold benefit. First and foremost, there are no extra bearings, pulleys,

gear reducers or additional shafts to maintain or fail. The second benefit is the

higher efficiency gained by connecting the motor to the motor shaft, there are no

losses due to friction from ,bearings and gears, thus providing the highest

efficiency available.

A. Contractor shall perform all field testing and final adjustment of cooling tower

equipment in accordance with provision of manufacturer.

B. Contractor shall certify that all operation criteria are within normal operating

range as specified by the manufacturer.

C. Should any part of the cooling tower equipment fail to meet any specified

requirement, adjust, repair or replace any and all defects or inoperative parts

immediately with manufacturers recommended parts or procedures.


ANTIFREEZE PACKAGE / RESISTANCE HEATING OPTION

The antifreeze package is supplied to provide protection against freezing of standing water in the cooling

tower sump due to shutdown during winter operation. The option is provided when draining the system

during periods of prolonged shutdown is not feasible, such as during weekends, or when a separate

gravity feed indoor storage tank is not part of the re-circulation system.

This package includes the following components:

Immersion Heater:

6000 watt ~ 2.5” threaded connection ~ NEMA 4 enclosure

For each two fan cell (450 gallon sump capacity)

Thermostat Assembly:

Thermostat is to be set in field. Recommended setting is approximately 38°F.

NEMA 4 enclosure with SPDT switch ~ 30-130°F temperature range ~ 15A, 125-250-

460 VAC with ¾” Sch 80 bulkhead fitting and a ¾” x 1/3” Sch 40 reducer.

Liquid Level Switch Assembly:

NEMA 7 and 9 enclosures are standard on this SPDT level switch. This insures that the

heating element is submerged prior to energizing to prevent immersion heater burn cause

of low water level.

Heater Contactor:

NEMA 1 enclosure is standard. Open style for control panel mounting is available. This

contactor is mounted in the control panel when the panel is purchased from Delta.

PVC bulkhead fittings, for local installation, are included in component prices. Protection of external

piping by heat tracing and insulation is recommended but not included.

ANTIFREEZE PACKAGE / SOLENOID DRAIN VALVE

This option is utilized when freezing of standing water in the cooling tower sump could occur due to system

shutdown during winter operation. An electrically actuated valve will open when the pumps are not operating

and the temperatures approach freezing. The valve can be installed in the sump drain fitting of the tower (at

the factory) or remotely at the piping low point (by others in the field).

Components provided are:

A) Solenoid actuated to open, spring to close, 2-way valve, 1” line size, with NEMA 4 enclosure.

B) 1” PVC tee

C) 1” PVC plug

D) Temperature switch with bulkhead fitting

When power is removed the valve automatically reverts to the close position.

BOTTOM OUTLET

The Bottom Outlet is a convenient option when gravity draining a cooling tower. This minimizes the

amount of standing water in the sump of the cooling tower. The sump of the TM Series cooling towers

slopes toward the outlet and drain fittings to maximize drainage. The bottom outlet is placed at the low

point in the sloped sump basin. A 125lb. flanged fitting is provided. Indoor storage tanks and other

fittings can be provided by Delta.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


CONTROL PANEL

A control panel is required any time there are electrical devices involved in a system. The standard

features of a Delta supplied control panel are:

A) NEMA 3R water tight enclosure

B) Single speed motor starter

C) 110V transformer with fuses

D) Blower operating lights

E) Blower selector switches

F) Terminal strips

G) 208V or 230V or 460V or 575V / 3Ph / 60Hz

Optional items available:

!" Disconnect switch: either fused, unfused or magnetic circuit breaker type.

!" Motor starter fuses or circuit breakers.

!" Additional motor starters, selector switches and lights to interface with existing systems,

remote pumps, etc.

!" Any other NEMA enclosure manufactured.

!" Pre-mounting of control panel and pre-wiring of skid mounted options with Liquid-Tite

conduit or EMT. (Consult factory for add pricing)

Delta also can provide programmable controllers, computer interfacing, telemetry, and any other type of

control system required. Pre-mounting and pre-wiring of the control panel for a system installation are

available. This minimizes the labor required for field installation.

EQUALIZER FITTINGS

This option is desirable for multiple 2 fan cell installations to provide equal liquid levels in the sumps of

the individual 2 fan cells and allows for the installation of only one water make-up line. Delta provides

the fittings installed in the cooling towers to provide for gravity flow from one tower sump to another.

The equalizer connection is not for full flow transfer (ex: pumping from one unit to another). The

connecting piping should be field installed and is the responsibility of others.

FAN ASSEMBLY COATING

The standard fan coating provided for the cooling tower fan ring and guards is a cross linked epoxyphenolic

with an alkaline curing agent and formulated to withstand a wide range of chemicals and for

ease of handling. This coating provides excellent chemical resistance to a wide range of acids, alkalies,

solvent and water solutions. When dry, the coating can withstand up to 400°F temperature. The fan ring

and guard steel surfaces are sand blasted and a primer is applied prior to the final application.

HIGH SUMP LEVEL SWITCH

The hump sump level switch option is utilized when a potential overflow must be avoided. Switch

elevation is set below the point when the water in the sump will overflow onto the ground. The switch

can be used to illuminate a light, shut off the influent feed pump or initiate some other device or alarm.

This package consists of a NEMA 7 and 9 liquid level switch mounted in a PVC bulkhead fitting

assembly with a 2” x 1” reducer bushing.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


INSTALLATION

The TM Series cooling towers can be set on a flat concrete pad or elevated on a pair of I-beams situated

in the I-beam pockets molded into each two fan cell of the TM Series sump. The I-beams should be

appropriately supported for the operating weight of the cooling tower plus, snow loads if applicable, and

personnel responsible for maintenance. The TM Series cooling towers ship in 2 pieces: Main housing

and the sump. The Main Housing is placed on the sump posts that fit up into the molded pockets in the

housing. (Refer to the TM Installation, Operation and Maintenance manual)

LADDER

The ladder assembly facilitates access to the upper section of the cooling tower for inspection and

maintenance of the water distribution system and fan assembly as required. The assembly is fabricated of

aluminum for lightweight installation and has skid resistant rungs and landing platform. The landing

platform is specifically placed to maximize accessibility to the man-way located in the conical section of

the tower for easy access and servicing of components. The ladder conforms to all OSHA requirements.

In some cases the cage assembly may be required. The unit is attached to the tower via (4) bolted

connections and two base mounting bolts. Ladder extensions are available for elevated installation

platforms.

MOTOR SPACE HEATER

Fan Motor Space Heaters are recommended for installations where temperature variations can cause

excessive condensation within the motor. The Space Heater controls can be incorporated in our Control

Panel and would be designed for automatic and manual operation. While the motor is operating, the

heater remains off. When the motor shuts down, the heater is automatically energized during the off

cycle. The Control Panel would be designed with manual on/off control for intermittent cycles of

operation. Heaters are available for 115, 230, 460, or 550 volts, 3 phase, 60-cycle operation.

OUTLET STRAINER BASKET

This option is desirable to prevent debris that may have entered the cooling tower sump from getting into

the pump, or the rest of the cooling water system. This option is recommended to minimize particle size

that could foul chillers, heat exchangers, compressors or the cooling tower distribution laterals. A vortex

breaker pipe, which is provided as standard on pump suction applications, is included to maximize the

inlet area and prevent cavitation. The strainer is made from a vortex breaker pipe surrounded by 3/16” #2

PVC coated mesh screen. Finer mesh screens can be overlaid to minimize particle size. Consult Delta for

add prices and availability.

PLATFORM

The platform is beneficial in installations where a flat and level surface is not available for mounting

Delta’s cooling towers. The steel platform is also utilized for replacement installations where only “I”

beams, or other forms of support exist. This steel platform is finished in a black air-dried phenolic paint.

The platform is shipped in two separate pieces, for transportation purposes, and must be supported in the

field by others. An optional walkway can be supplied to allow for accessing the cooling tower sump,

should the platform be elevated.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


PUMP

The pump package is offered to allow for single source responsibility of cooling tower equipment. The

size of the pump is determined by two factors:

A) Flow rate

B) Total dynamic head

The customer is responsible for supplying this information. The pumps come complete closed-coupled

with mechanical seals and ODP, 208/230/460V, 3 phase motor. TEFC motors are available.

SAFETY CAGE

Complementary to the ladder option. Extends above the ladder-landing platform for extra protection

while accessing the top of the cooling tower. The safety cage is assembled to the ladder at the factory for

ease of installation. This assembly is attached directly to the cooling tower shell during installation.

The safety cage may or may not be required depending on OSHA specifications. The cage assembly is

manufactured of the same type of aluminum as the ladder.

THERMOSTATS – Single Stage and Two-Stage

The fan thermostat is important to minimize operating costs. The thermostat senses water temperature

and controls fan operation during cold weather service. When cold-water temperature drops below

design, the fan will shut off saving motor hp operating costs.

A single stage thermostat controls the fan on/off and is provided with a standard single speed

motors.

A two-stage thermostat is required for two speed motor operation and controls the fan from ‘on’

to ‘half speed’ and then to ‘off’. At half speed operation the motor operates at only ¼ full load

BHP. Two stage thermostats must be wired to Delta specifications.

As the cold-water temperature rises and approaches the design temperature, the thermostat signals the fan

to start in order to maintain the cold water design temperature. The thermostat has a 5°F differential in its

operating range of 30°F to 130°F. The contacts are SPDT and have a 15 Amp UL rating. They are

complete with NEMA 4 enclosures suitable for outdoor mounting. The thermostat can be provided loose,

or installed in the cooling tower sump, or an indoor storage tank. When the thermostat is supplied with a

cooling tower or storage tank provided by Delta, the package includes installation with a ¾” Schedule 80

PVC bulkhead fitting and a ¾” x ½” Schedule 40 PVC reducer bushing. Thermostat operating range

must be set in the field. Recommended setting is approximately 70°F to 72°F, but will vary depending on

the application and the installation location.

TWO-SPEED FAN MOTOR

Two speed fan motors provide cold-water temperature control by means of airflow modulation, allowing for

design cold-water temperature at minimum operating cost. When provided with a two-stage thermostat, the

motor can be reduced to half speed when cold water sump temperature approaches design. The motor will

shut off when the cold-water temperature falls below design. Two-speed TEAO motors are provided for

single voltage 3-phase operation only. Single-phase dual voltage motors are not available. NOTE: a ½

reduction in motor speed corresponds to ½ reduction airflow. At half speed operation, only 1/8 BHP is

consumed.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


UPPER SAFETY HANDRAIL SYSTEM

An optional safety handrail system is available to provide protection while on top of the cooling tower

inspecting or working on the mechanical equipment. This option is shipped pre-fabricated for assembly in the

field.

VIBRATION CUTOUT SWITCH

The vibration cutout switch option is utilized to shut down the rotating mechanical fans in the event of

excessive vibration. This device helps prevent further potential damage by shutting the motor off. It is wired

in series with the motor starter coil and has dry contact rating of 10-ampere capacity at 120 VAC. Delta

provides the vibration cutout switch installed on the blower when ordered as a component of a new cooling

tower or on a replacement blower assembly.

Delta Cooling Towers, Inc.

41 Pine Street ~ PO Box 315

Rockaway, NJ 07866

973/586-2201 / 973/586-2243 fax


Revised 1-8-2007

Delta Cooling Towers, Inc.

TM Series ! Cooling Tower

!

Installation, Operation & Maintenance

Manual


Table of Contents

Delta Cooling Towers Principle of Cooling Towers………………..……………. 2

Cooling Tower Terms and Definitions…………………… 2

Water Treatment……..………………………….……….. 3

General Information Safety………………..………………………………….… 3

Approximate Weights………………..…………………… 4

Dimensions & Other Physical Data……..………...……… 4

Handling & Installation On-Site Inspection………………..………..…….….……. 5

Off Loading……..……………..………………………….. 5

Anchoring……..……….…………………………..……… 8

Electrical Wiring of Fan Motor & Accessories……..…….. 8

Location, Piping & Connections……..…….……….…….. 8

PVC Solvent Cementing Instructions………………...…… 10

Operation and Maintenance Safety in Operation of the Fan..…..………..…….….……. 11

Water Distribution System……..…………………………. 11

Fan & Mechanical Drive System….………………..…...… 12

Start-up Instructions………………………………..…….. 12

Water Level in Tower Sump…..……..…….……….…….. 13

Cold Weather Operation…………...………………...…… 14

Trouble-Shooting Guide.…………...……………….….… 16

Motor Trouble-Shooting Guide…………...………....…… 18

Other Information Cooling Tower Optional Accessories..…..…...….….……. 19

Recommended Replacement Parts……..…………………. 19

Preventative Maintenance Checklist….……………….….. 20

Important: Delta’s cooling towers have been designed to provide trouble-free service over an extended period of time. To obtain

the design performance, it is necessary that the cooling tower be installed, operated and maintained as prescribed in

these instructions.

Only persons possessing the skill and experience described herein should attempt to install this equipment. Prior to

installation, these instructions should be read carefully by the person who is to install the cooling tower to be

certain that its installation, operation and maintenance are thoroughly understood.

Questions regarding the installation, operation or maintenance of this equipment should be directed to Delta Cooling

Towers, Inc., Rockaway, New Jersey, (Telephone: 973/586-2201).

Step-by-step instructions contained in this brochure are based on normal installation conditions only. Abnormal or

unusual combinations of field conditions should be brought to the attention of Delta Cooling Towers or its

representative prior to installation of the equipment. The information contained herein is subject to change without

notice in the interest of product improvement.

Revised 1-8-2007 1


Delta Cooling Towers

Principle of Cooling Towers

All Cooling Towers operate on the principle of removing heat from water by evaporating a small portion of the

water that is recirculated through the unit.

The heat that is removed is called the latent heat of vaporization.

Each one pound of water that is evaporated removes approximately 1,000 BTU's in the form of latent heat.

Cooling Tower Terms and Definitions

BTU - A BTU is the heat energy required to raise the temperature of one pound of water one degree Fahrenheit

in the range from 32° F. to 212° F.

Cooling Range - The difference in temperature between the hot water entering the tower and the cold water

leaving the tower is the cooling range.

Approach - The difference between the temperature of the cold water leaving the tower and the wet-bulb

temperature of the air is known as the approach. Establishment of the approach fixes the operating temperature

of the tower and is a most important parameter in determining both tower size and cost.

Drift - The water entrained in the air flow and discharged to the atmosphere. Drift loss does not include water

lost by evaporation. Proper tower design and operation can minimize drift loss.

Heat Load - The amount of heat to be removed from the circulating water within the tower. Heat load is equal to

water circulation rate (gpm) times the cooling range times 500 and is expressed in BTU/hr. Heat load is also an

important parameter in determining tower size and cost.

Ton - An evaporative cooling ton is 15,000 BTU's per hour.

Wet-Bulb Temperature - The lowest temperature that water theoretically can reach by evaporation. Wet-Bulb

Temperature is an extremely important parameter in tower selection and design and should be measured by a

psychrometer.

Pumping Head - The pressure required to pump the water from the tower basin, through the entire system and

return to the top of the tower.

Make-Up - The amount of water required to replace normal losses caused by bleed-off, drift, and evaporation.

Bleed Off (Blowdown) - The circulating water in the tower which is discharged to waste to help keep the

dissolved solids concentration of the water below a maximum allowable limit. As a result of evaporation,

dissolved solids concentration will continually increase unless reduced by bleed off.

Revised 1-8-2007 2


Water Treatment

"# The Delta Cooling Towers are manufactured from corrosion-resistant plastics which are resistant to water

treatment chemicals including common fungicides and bactericides.

"# Follow appropriate water treatment practices as required and take frequent sample tests to avoid possible

water contamination. We also recommend water treatment maintenance as a measure of protection of the

environment in the vicinity of any cooling tower or other equipment open to atmosphere.

"# To determine the appropriate water treatment practices for your particular application, it is suggested that

you contact a water treatment firm for their recommendation. A list of water treatment firms is available for

your reference. It is not necessarily complete nor do we recommend a specific firm. The list will be mailed to

you on request or consult your local yellow pages.

"# Bleed-off is also important to water quality. Evaporation of the recirculated water does not remove the

dissolved solids that are present in the water. Without bleed-off, the continual buildup of these solids will

impair the proper functioning of the piping and other equipment in the system.

"# A bleed line can be connected in any part of the system for routing to the sewer. Normally, it is most

desirable to make this connection in the hot water line at the cooling tower. A petcock type valve, installed in

the bleed line is recommended. Normally, bleed-off of 1% to 2% of the recirculation water flow is

satisfactory. The required amount of bleed-off water must be substituted with properly controlled amounts of

make-up water.

General Information

Safety

When handling, lifting, installing or operating the cooling tower, always employ safe work procedures,

according to best practices of the trade and according to applicable construction, electrical and safety standards,

regulations and codes.

Follow all safety practices described in these instructions.

Revised 1-8-2007 3


Approximate Weights

The TM Series cooling towers are manufactured in three basic sections; a polyethylene tower body, a

polyethylene sump, and a fan assembly section. The tower body ships with the fan assemblies installed.

The tower sump ships as a separate piece.

Approximate Weights (lbs.)

Model Group Shipping

Body Sump

TM-105312 – TM-115412

TM-205312 – TM-215412

TM-305312 – TM-315412

TM-405312 – TM-415412

TM-505312 – TM-510412

TM-605312 – TM-610412

Dimensions and Other Physical Data

4,850

(2) 4,850

(3) 4,850

(4) 4,850

(5) 4,850

(6) 4,850

1,660

(2) 1,660

(3) 1,760

(4) 1,760

(5) 1,760

(6) 1,760

Revised 1-8-2007 4

Overall

Dimensions

(inches)

Operating L x W x H

11,800

23,600

35,400

47,200

59,000

70,800

198” x 102” x 186”

198” x 204” x 186”

198” x 306” x 198”

198” x 408” x 198”

198” x 510” x 198”

198” x 612” x 198”

For cooling tower dimensions, design for foundations, assembly and layout, refer to the following

drawings which are a part of these instructions:

Model Group Title Drawing No.

TM-105312 – TM-115412 1 Cell DT-D-87-901

TM-205312 – TM-215412 2 Cell (5 - 7.5 HP) DT-D-87-902

2 Cell (10 – 15 HP) DT-D-87-903

TM-305312 – TM-315412 3 Cell

DT-D-87-904-1

DT-D-87-904-2

TM-405312 – TM-415412 4 Cell DT-D-87-905-1

DT-D-87-905-2

TM-505312 – TM-510412 5 Cell DT-D-87-906-1

DT-D-87-906-2

TM-605312 – TM-610412 6 Cell DT-D-87-907-1

DT-D-87-907-1


Handling and Installation of Your TM Series Cooling Tower

On -Site Inspection

Upon arrival at the job site, carefully inspect the shipment for any damage. If shipping damage has occurred,

notify the driver or the carrier immediately and make a notation of the damage on the shipping bill of lading.

Check that all items listed B/L have been received.

Offloading

The TM Series cooling towers are normally delivered to the site on a 30 inch high drop deck trailer. Both the

tower body assembly and sump assembly are strapped down to the truck bed. The sump assembly should be

unloaded first.

Lifting with crane:

"# Use fabric slings of sufficient strength for better load distribution and protection of the plastic tower

body.

"# Wrap slings underneath tower sump assembly to lift and set into place.

"# Lift tower body by attaching slings, kept separate by spreader bars, to the four lifting bars as shown

below.

"# Spreader bars must be used to lift vertically on the lifting bar. Above the spreader bars use adequate

length straps specifically designed for vertical lifting in order to maintain an angle of 60° or less between

slings.

Revised 1-8-2007 5

Lifting Bar


Store tower assembly as shipped until the time of installation, in a secure, level and debris free location at the job

site.

CAUTION: For extended lifts, use duplicate rigging, fabric slings around body as shown, as an additional

safety precaution.

Installing

The cooling tower should be assembled in place on the previously prepared foundation.

"# After re-checking the rigging, lift the sump section of each cell and secure properly to the foundation.

"# Attach the fiberglass sump box to the center support post using the hardware provided as shown.

Revised 1-8-2007 6


"# The body section should then be lifted and carefully position to align the support post of the sump

with the corresponding groove of the tower body. Note that the four corner posts are slightly higher

than other post to ease installation alignment.

"# Set one end of the tower body onto the corner post at one end of the sump first. This can be

accomplished by use of a rope tether attached to the lifting bar at one end of the housing. Continue

setting and aligning support post along the sides of the tower moving from one end to the other. This

step may require a couple installers to align multiple posts simultaneously. You may use a rubber mallet

or blocking wood to aid aligning post.

IMPORTANT: Make sure that all posts are correctly seated into the pocket of the tower body.

"# For single cell units, the four corner sump posts should then be secured to the main housing with the

provided stainless steel angle brackets and hardware. On Multi-cell towers, the outermost four corner posts

should be secured to the main housing with the provided stainless steel angle brackets and hardware.

"# Before installing PVC louver panels, verify that all post are correctly seated into the pockets of the tower

body.

"# Install PVC louver panels between each support post. Panels are numbered and marked on top of each

panel, and should be installed with corresponding numbered window opening. Insert bottom of panel into

window opening and work your way up to the top. Panels should be mounted flush with inside top of louver

opening inside tower and should direct incoming air downward. Secure panels with self-tapping screws

provided.

Revised 1-8-2007 7


"# On multi cell towers, install PVC water redirector panels between each sump using self-tapping screws

provided (See sketch below). Start with screwing the PVC post from the bottom up. Next apply a heavy

bead of RTV sealant on the end of each redirector panel. Start screwing the redirector panels from the end

nearest the post toward the center. Do not screw overlapping panels to allow for expansion and contraction.

Revised 1-8-2007 8

(Side View of Redirector Panels)

"# Secure tops of adjacent multi cell units together by bolting the two steel support angle brackets provided

to the lifting lugs of each cooling tower shell. The angle brackets should then be bolted together with

hardware provided.

Anchoring

Multi Cell Water Redirectors.

The foundation must be flat, smooth and rigid enough to be capable of independent support of the cooling tower

assembly and water load in the sump at its maximum level. The tower assembly can also be mounted on I-beams

using the integrally molded I-beam pockets (See tower drawings).

"# Four hold-down anchor lugs are provided on the sump of each tower cell.

"# Support beams and anchor bolts are to be furnished by others.

"# Beams should be sized at least 7” wide and in accordance with acceptable structural practices. These beams

should be located in the integrally molded I-beam pockets, and should run the length of the unit.

"# Use anchor bolts sized for a minimum of 15,000 lbs. pull-out load per anchor lug for wind loading.


Electrical Wiring of Fan Motor and Accessories

"# Installation of a vibration cut-out switch is recommended. (Refer to tower accessories available).

"# All electrical work should be performed only by qualified personnel and in accordance to prevailing

electrical codes, practices and safety standards.

"# The motor starter should be sized on voltage, nominal horsepower, and maximum full load current. This

current value can be found on the motor nameplate. If the starter cannot accept the maximum full load motor

current, the next size should be used.

"# Motor heaters should be selected on the basics of maximum full load current and service factors based on the

motor nameplate.

"# Standard “Cooling Tower Service” motors are supplied with a minimum of a 1.15 Service Factor.

"# Optional two speed motors are single winding variable torque.

"# Run flexible conduit with some slack from the motor conduit box to terminal box outside the tower where

rigid conduit can be used.

"# Conduit holding clip screws can be tapped directly into the tower wall. Use maximum 3/8” long screws.

"# For the typical wiring schematic of fan motor and tower accessories, see Delta dwg. DT –B-78-001, included

with these instructions.

Location, Piping and Connections

"# Piping should be adequately sized in accordance with accepted standard practices.

"# Gravity drain to indoor storage sump requires proper head differential and piping design considerations.

Allowance must be made for flow, pipe size, piping layout and distance of cooling tower from the indoor

storage sump.

"# On multiple cell installations, valving and/or pipe sizing should balance pressure drops to provide equal inlet

pressures. Equalizing fittings are provided in the sumps of each cell and can piped together to balance sump

water level. Each cell should be valved separately to allow for flow balancing or isolation from service.

"# Prior to start-up check that the PVC locknuts on all bulkhead fittings are properly tightened to prevent

nuisance leaks. A chain wrench can be used to check and tighten the locknuts.

"# Check that the SS hexagonal nuts on the inlet and outlet PVC flanges are properly tightened to prevent

nuisance leaks. While tightening the nuts, do not allow the bolt to rotate. This could damage the rubber seal

under the flat washer on the bolt head located inside the cooling tower.

"# All supply and return piping must be independently supported.

Revised 1-8-2007 9


PVC Solvent Cementing Instructions

The following procedure is recommended for the preparation and cementing of internal and external piping for

Delta Cooling Towers:

"# Cut ends of pipe square using a handsaw and miter box. Tube cutters with wheels designed for use with PVC

are acceptable, providing they do not leave a raised bead on the outside diameter of the pipe.

"# Use a chamfering tool or file to put a 10° to 15° chamfer on the end of the pipe. Lightly sand the area to be

cemented to remove gloss. Using a clean rag, wipe pipe surface and fitting socket to remove dirt, moisture

and grease. Acetone or similar solvent is recommended for cleaning.

"# Check "dry fit" of pipe and fitting by inserting pipe at least 1/3 of the way into the fitting. Position pipe and

fitting to assure alignment. Pipe and fitting should be at same temperature condition.

"# Using a clean, natural bristle brush about 1/2 the size of the pipe diameter, apply a primer to the fitting

socket. Apply primer with a scrubbing motion until the surface is penetrated. Primer should never be applied

with a rag. Repeated applications may be necessary to achieve the desired dissolving action. In the same

manner, apply primer to the pipe surface equal to the depth of the fitting socket, making sure the surface is

well penetrated. Reapply primer to the fitting socket to make sure it is still wet.

"# While both surfaces are still wet with primer, use a clean brush to apply a liberal coat of solvent cement to

the male end of the pipe. The amount should be more than sufficient to fill any gap. Next apply a light coat

of solvent cement to the inside of the socket, using straight outward strokes to keep excess cement out of the

socket.

"# While both surfaces are still wet with solvent cement, insert the pipe into the socket with a quarter-turn

twisting motion. The pipe must be inserted the full length of the socket. The application of solvent cement to

pipe and fitting, and the insertion of the pipe into the fitting, should be completed in less than one minute. If

necessary, two persons should apply solvent cement to the pipe and fitting simultaneously.

"# Hold the joint together for approximately 30 seconds until both surfaces are firmly gripped. After assembly,

a properly made joint will usually show a bead of cement around its entire perimeter. This should be brushed

off. It is recommended that the joint be allowed to cure for 24 hours before pressure testing or operation.

Revised 1-8-2007 10


Operation and Maintenance of Your TM Series Cooling Tower

Safety in Operation of the Fan

NEVER operate the fan when the access panel or the entire fan guard is removed.

NEVER remove access manhole cover while fan is in operation.

NEVER operate fan when any work, access, maintenance, trouble-shooting, etc. is being performed on the

inside of the fan ring assembly or inside the tower plenum.

"# Normally, electrical codes dictate a disconnect box at the cooling tower.

"# The handle of the disconnect box must be locked in the off position and an OSHA DANGER tag

(DO NOT OPERATE) must be attached to handle securely.

Note: Removing fuses from the disconnect box may provide further assurance, but only when done by qualified

personnel.

The foregoing precautions apply when any type of internal access to the tower is required, including the

following examples:

"# Checking, maintenance or replacement of any fan assembly component.

"# Checking, maintenance or replacement of the water distribution system inside the tower.

"# Cleaning of the fill.

"# Any work that necessitates removal of any access door, the fan guard or the manhole cover.

Water Distribution System

Water distribution is accomplished by a low pressure, non-rotating, spray nozzle system

designed to accommodate the specified flow rate.

IMPORTANT:

"# The flow rate of the cooling tower must be as close to the design gpm as possible. The water

distribution system, including spray nozzles, is provided for the design flow condition.

Under-pumping or over-pumping will cause the cooling tower to perform inefficiently.

"# Design pressure at the inlet connection must be maintained for proper water distribution.

If the pressure is less or greater than the design, proper water dispersion over the internal wet

decking will be impaired. If inlet pressure is low, water spray will not cover the entire wet

decking surface. This causes channeling of air, and does not make maximum use of the heat

transfer media. High inlet pressures will cause the water to over-spray the wet decking

media, hit the internal side walls of the tower shell and drop in a vertical flow along the shell

walls without the opportunity for water / air contact through the heat exchange media.

Excessive high spray pressure may also cause wet decking fatigue and damage.

"# The operating inlet pressure should be between 4.0 and 5.5 psi at the tower inlet.

Revised 1-8-2007 11


"# The maximum operating inlet water temperature should not exceed 140° F.

CAUTION:

When stepping on top of the fill, distribute the body weight by means of two plywood plates as

described earlier in these instructions.

Fan and Mechanical Drive System and Its Maintenance

Safety

Follow all safety instructions previously discussed.

Motor:

"# The standard motor is a totally enclosed motor , Class F insulation, 1.15 minimum service

factor, epoxy coating on outside frame, and is specifically designed for cooling tower duty to

the exclusive specifications of Delta Cooling Towers.

"# Should there be a problem with the motor, which may be covered under our standard

warranty, the motor must only be inspected and serviced by an authorized motor

manufactures warranty shop, and Delta Cooling Towers, Inc. must be notified, otherwise the

warranty is void.

"# If the motor bearings have grease fittings, follow the lubrication recommendations as

outlined in instructions from motor manufacturer. The majority of motors do not require

greasing.

Start-up Instructions

Complete all start-up instructions before applying heat load.

"# Clean any accumulated debris or packaging material from inside tower sump.

"# Check to be sure that the fan motor is properly wired for correct rotation as viewed from the

top of the fan. Reverse leads will cause incorrect rotation and reverse direction of airflow.

Note: Fan rotation should always agree with rotation labels. Standard fan rotation is

clockwise, (C.W.) however; non-standard fans may be designed to rotate counter

clockwise, (C.C.W.)

"# Check for free rotation of the fan and fan blade tip clearance.

"# Fill the cooling tower sump or the cold water storage reservoir on gravity drain applications.

"# Water recirculation pump should be primed and all piping below the tower sump filled with

water. Check pump for proper shaft rotation.

"# Start water recirculation pump and adjust flow to design. A flow metering device installed in

the inlet is recommended but if not available, use the pressure differential across the pump in

conjunction with the pump curve.

Revised 1-8-2007 12


"# Check spray pattern from nozzles to be sure there is no clogging. Remove drift eliminators

for nozzle inspection, then return to proper position.

"# Start up fan motor and check amperage and voltage against motor nameplate data.

"# The standard make-up valve assembly is shipped with the plastic float ball strapped against

the tower side to prevent damage. To set the ball for proper operation, loosen the screw in the

fulcrum arm, lift or depress the arm with the plunger pressed against the valve seat and

tighten. Repeat until the proper operating level is obtained (Refer to operating level table

below). It is recommended that a shut-off valve be installed in the make-up line.

"# After 24 hours of operation:

!" Check spray nozzles for clogging.

!" Check tower sump water level.

Water Level in Tower Sump

"# When the cooling tower is being operated with pump-suction, the make-up valve assembly

with float ball should be adjusted to set the water operating level as follows:

Tower Model # Operating level (from

bottom of sump)

All Towers

Revised 1-8-2007 13

10 inches

"# Access the make-up valve through the window louver marked “Access Panel”.

"# A lower water level than recommended may cause air to be drawn into the tower outlet

piping and cause pump "cavitation."

"# A water level higher than recommended will cause continuous overflow and waste of water

as a result of potential “pull-down” from the piping when the system is shut down.

"# The overflow should NEVER be capped, or its elevation altered by raising external piping.

Note: On gravity drain cooling tower(s), make-up assembly, overflow, drain and vortex breaker

are not provided.


Cold Weather Operation

Cold Weather Protection

The cooling tower may require protection against freezing at light heat loads when the wet-bulb

temperature is under 32°F., or during shutdown when the temperature drops below 32°F.

The following methods are recommended for use in Delta Cooling towers for protection during

cold weather conditions. Recommended equipment is optional and may be ordered from the

factory. Consult the factory for further information on which equipment to choose for your

specific application.

Separate Indoor Sump

This method is virtually a foolproof antifreeze protection system with the added advantage of

minimum maintenance. The indoor sump tank should be large enough to fill the entire

recirculation system without danger of pump cavitation. As a general rule, the tank should be

sized to hold three times the rate of circulation in gallons per minute (gpm).

The tank should be provided with properly sized overflow, make-up drain and suction

connections. When a separate sump is ordered with a cooling tower, the water make-up valve

assembly and the overflow and drain connections are installed in the indoor sump only.

When a sump tank is used, the cooling tower should be located high enough above it to allow

free cold water gravity drain. A bottom outlet can be provided for gravity drain to indoor sump

tank installations.

Reverse siphoning is a back flow of non-potable, recirculating water into a potable water

system, which can occur through the make-up float valve assembly located in the water

reservoir. Should the valve malfunction, blockage of the overflow or outlet lines would cause

water level to rise in the reservoir, and the make-up water pressure could drop below the

atmospheric pressure creating a vacuum at the make-up inlet. Although precautions to

prevent reverse siphoning are incorporated in the cooling tower design, we also recommend

installing a check valve in the water make-up supply line, as a backup precaution.

Electric Immersion Heater

Cooling towers can be ordered with an anti-freeze immersion heater systems, which consist of a

6KW heating element, water level sensor, adjustable thermostat and contactor. Components are

factory installed, but will require field wiring.

Thermostatic On/Off Control

A thermostatically controlled fan for on/off operation, should be considered as an energy saving

feature, for capacity control during winter operation. The thermostatic control can be field set to

insure automatic fan shut-down when cold water drops below design temperatures, as well as fan

start-up when cold water rises to design temperature.

A thermostatic control provides excellent cooling tower anti-freeze protection while reducing

operating costs throughout cold weather operation.

Revised 1-8-2007 14


PVC Distribution System

To prevent damage to the PVC distribution system during cold weather shut-down, install an

automatic or manual drain line from the hot water inlet piping as close to the cooling tower inlet

as possible. The entire inlet and distribution system must be drained for shut-down in subfreezing

weather.

Piping

When the cooling tower is located outdoors, adequate measures including the use of heating

tapes and insulation should be considered to protect water lines from freezing.

Operation at Sub-freezing Ambients

See Thermostatic On/Off control

1. Insure that the cooling tower is operating at the maximum possible heat load - An operating

cooling tower will continuously extract heat from the circulating water. Without a heat load,

the water will end up either at the air wet bulb temperature, or as ice, whichever occurs first.

2. Maintain Design Water Flow Rate Over The Fill - Reducing water flow over the fill area

can produce semi-dry regions that are subject to rapid freezing.

3. Make sure a thermostat is installed to control fan operation to off at low cold-water

temperatures.

4. If tower is equipped with two speed motors, operate at low speed to increase leaving water

temperature.

5. Cycle fans periodically to prevent ice from forming on louvers.

6. It may also be necessary to reverse fans for a short period of time to help melt ice by

forcing warm water into tower.

"# De-energize the fan(s) for two full minutes before reversing.

"# Reverse fan(s) no more than 2 minutes at a time (repeat as necessary). Extended

reverse operation can cause ice to form on fan blades causing an out-of-balance condition.

"# If the tower is equipped with a two-speed motor, reverse only at low speed.

"# On multi-cell towers, fans immediately adjacent to reversed fans should be shut off

during reversal.

"# After reversal, let fan(s) stand idle 5 to 10 minutes before forward operation.

"# Monitor the tower closely for unusual vibrations or sounds.

7. Frequent visual inspections and routine maintenance during sub-freezing operation is very

important and should not be overlooked.

15


Trouble-Shooting Guide For TM Series

Induced Draft Cooling Towers

Problem Possible Causes Corrective Actions

Increase in the leaving water

temperature

Drop in the water flow rate.

Low water flow rate

1. Excess water flow; over pumping.

2. Recirculation of hot discharge air, back into

the cooling tower air intakes. Obstructed air

intakes

3. Proximity of other heat source or discharge

of moist air.

4. Improper operation of spray system.

A. Orifices clogged.

B. Actual water flow is lower than design

sprinkler rating.

5. Clogged fill.

6. Damaged fill.

7. Additional heat load on system.

8. Wet-bulb temperature higher than design.

1. Blockage of spray Nozzle orifices.

2. Low water level in sump causing air to be

drawn into pump and piping.

3. Improper selection of water circulating

pump.

4. Blockage of strainers.

5. Pump malfunction.

Noise and vibration 1. Loose bolts.

2. Mechanical interference of rotating parts.

Sudden or short term irregularities of

cold water level in basin

Excessively high water level in sump on

gravity drain installation

3. Fan propeller damaged or out of balance.

4. Air intake at pump.

5. Pump cavitation.

6. Damaged motor bearings.

1. Peculiarities of specific system and its

operation.

1. Gravity flow restrictions due to insufficient

head differential.

16

1. Adjust to the design flow.

2. Eliminate obstructions which impede air discharge.

For proper location of cooling tower(s), see Delta

dwgs. Baffle air discharge, if necessary.

3. Remove source or relocate tower.

4. See water distribution system instructions.

A. Flush spray nozzles, clean orifices, clean

system, install outlet strainer.

B. Install properly rated spray nozzles or increase

to design flow.

5. Clean the fill.

6. Replace the fill.

7. Contact Delta for possible upgrade or addition of

another cooling tower selected for additional load.

8. None required if condition is temporary. Otherwise

consult Factory for upgrade.

1. Flush spray nozzle. Clean whole system. Install

outlet strainer.

2. Adjust float valves. Be sure the system is flooded

and balanced.

3. Replace with proper size pump designed for flow

and head requirements. Check pump “Net positive

suction head.”

4. Backwash or clean.

5. Consult pump specialist.

1. Recheck and tighten all bolts to specified torque.

2. Inspect propeller for free rotation. Check propeller

for mechanical interference. Adjust, repair or

replace, as necessary.

3. Replace components, as necessary and check

balance. Install vibration cut-out switch.

4. Check basin water level and irregular piping design.

5. Match pump NPSH with system hydraulics.

6. Check and replace motor.

1. Inspect system and review operation procedures.

Correct, as applicable valve settings, loss of water in

system, fill system to flooded capacity.

1.

A. Outlet piping should terminate below sump tank

water level.

B. Increase discharge pipe size.

C. Increase head by mean other than A.


Problem Possible Causes Corrective Actions

Excessively high water level in tower basin

on closed loop system installations

Uneven water level in tower basins of multicell

installations

2. Airlock.

3. Unnecessary obstruction of waterflow

(i.e., partially closed valve).

4. Undersized piping.

5. Horizontal pipe run too long.

6. Improper hydraulic pipe design.

7. Outlet vortex breaker provided.

1. Make-up valve float set too high.

2. Valve or float damaged or

malfunctioning.

3. Make-up water pressure too high.

1. Unbalanced system hydraulics.

2. More than one make-up valve

operating, and set for different water

levels.

Excessive water carry over (drift) 1. Surfaces of top layer of fill damaged

causing “pooling” of water.

2. Eliminator(s) not in place.

3. Damaged eliminator.

4. Excess water flow.

Premature or excessive corrosion of fan

drive components

5. Orifices in spray nozzles clogged

causing improper water dispersement.

6. Blockage of fill.

1. Excessive drift.

2. Presence of corrosive chemicals in air

or water that was not known at time of

supply.

17

2. Install an air bleed valve at highest point

of piping, usually at a vertical angle.

3. Remove obstruction.

4. Increase pipe size.

5. Shorten, if possible.

6. Correct design.

7. Remove vortex breaker.

1. Readjust float arm.

2. Repair or replace.

3. Reduce pressure or contact Delta for

alternate solutions.

1. A. Install equalizer line with isolation

valves between modules.

C. Adjust inlet water flow to insure equal

distribution to each cooling tower

module.

D. Review outlet header hydraulics and

correct piping design, if applicable.

E. Contact Delta for assistance.

2. A. Adjust float level settings relative

To one another.

B. Shut-off and or/throttle flow to

one or more valves.

C. Installation of equalizers is

highly recommended.

1. Replace top layer. Protect fill when working

inside tower.

2. Reinstall.

3. Replace.

4. Reduce water flow or install spray nozzles

designed for the actual operating flow.

5. Install outlet strainer. Clean whole system

and spray nozzles.

6. Clean fill.

1. See “ Excessive Water Carry Over (Drift)”

above.

2. Remove source of corrosion or contact Delta

for alternative materials, premium coatings

or other precautions.


Motor Trouble Shooting Guide (General)

Problem Possible Causes Corrective Actions

High current draw (all 3 phases) 1. Low line voltage (5 to 10% lower

than nameplate).

2. 200V motor on 230/240V system.

3. 230V motor on 208V system.

4. Incorrect propeller.

5. Incorrect pitch if adjustable

Low motor current draw 1. Incorrect propeller.

Unbalanced current

(5% from average)

Excessive voltage drop

(2 or 3% of supply voltage)

2. Incorrect pitch if adjustable.

1. Unbalanced line voltage due to:

A. Power supply.

B. Unbalance system loading.

C. High resistance connection.

D. Undersized supply lines.

2. Defective Motor.

Overload relays tripping 1. Overload.

1. Inadequate power supply.

2. Undersized supply lines.

3. High resistance connections.

2. Unbalanced input current.

3. Single phasing.

4. Excessive voltage drop.

5. Frequent starting or intermittent

overloading.

6. High ambient starter temperature.

7. Wrong size relays.

8. Improper overload settings of

adjustable relays.

Motor runs very hot 1. Overloaded.

2. Blocked ventilation.

3. High ambient temperature.

4. Unbalanced input current.

5. Single phased.

Motor will not start 1. Single phased.

2. Rotor or bearings locked.

Excessive vibration (Mechanical)

Out of balance

1. Motor mounting.

2. Motor.

18

1. Consult power company.

2. Change to 230V motor.

3. Change to 200V or 280V motor.

4. Consult factory.

5. Reduce pitch / consult factory

1. Consult factory

2. Increase pitch / consult factory

1. Consult power company and/or

electrician.

2. Replace motor.

1. Consult power company.

2. Increase line sizes.

3. Check motor leads and other

connections.

1. Reduce load on motor or increase

motor size.

2. Balance supply voltage.

3. Eliminate.

4. Eliminate (see above).

5. Reduce frequency of starting and

overloading or increase motor size.

6. Reduce ambient temperature.

7. Correct size per nameplate current

and service factor.

8. Readjust to motor FL Amps x S.F.

1. Reduce overload.

2. Fouled fill or air restriction.

3. Reduce ambient temperature.

4. Balanced supply voltage.

5. Eliminate.

1. Shut power off – eliminate.

2. Shut power off – check shaft

rotation.

1. Check to be sure motor mounting

hardware is tight.

2. Replace motor.

Note: Consult Warranty page prior to replacing or repairing any cooling tower components. Delta recommendation and consent

to remedy material and workmanship defects is necessary, to avoid breach of Warranty.


TM Series Optional Accessories

TM Series Optional Accessories Available

!" Aluminum Ladder(s) with a step platform and railing at the fan elevation custom designed for the cooling

tower.

!" Safety cage(s).

!" Two speed motor(s) designed for cooling tower duty to the exclusive specifications of Delta Cooling

Towers.

!" Vibration cut-out switch provides for fan motor circuit disconnect for shutdown protection should

abnormal fan vibration develop during service. Installation of vibration cut-out switches are

recommended as good design practice.

!" Thermostat on/off control of fan operation through sensing the temperature of water leaving the tower.

!" Basin anti-freeze system for cold weather operation.

!" Custom designed top platform with handrails.

!" Pre-wired control panels.

!" Elevated mounting frame structures.

!" Pumps

!" Polyethylene Sump tanks up to 2,000 gallons for indoor installation for anti-freeze protection during

winter operation.

!" Motor space heaters are recommended for unusually high relative humidity conditions where extreme day

to night temperatures can cause excessive condensation in the motor, when in operation during this period.

!" Plastic outlet sump strainer.

!" Plastic equalizer fittings.

!" Variable frequency drive on fan motors, controlled by temperature controller.

!" High sump level switch

!" Automatic drain valve

Consult factory or a Delta representative for further information and an updated list of accessories.

TM Series Recommended Replacement Parts

To avoid costly cooling tower downtime, the following replacement parts should be carried in inventory at the

installation site:

!" Make-up float, or complete make-up valve assembly.

!" Cartridge of recommended moisture resistant lubricant.

!" Fan Motor.

!" Spray Nozzles.

When ordering, include model number and serial number of the cooling tower as it appears on the tower

nameplate. Under normal conditions, shipment of factory replacement parts is made within one day after the

order is received. Spare pumps and pump parts, as well as control panel components, such as fuses and heaters

for magnetic starters, are also available.

19


Preventative Maintenance Checklist

Procedure Monthly Every

3 Months

Inspect General Condition of cooling tower.

Check Water Level in cold water basin.

Adjust if needed.

Check float ball & Make-up Valve for

proper operation.

Check Line Voltage, Motor Amperage,

Water Pressure.

Clean Sump Strainers, if installed.

Lubricate Motor Bearing, (if motor has

fittings for greasing. The majority of motors

require no external greasing). Use Proper

Lubricants. Increase frequency, as necessary

depending on conditions of service.

Check for obstructed Water Flow Through

Orifices. Clean and flush spray nozzles, as

required.

Check All Bolts which can cause unbalance

and vibration and tighten specified torque.

Check Condition of Water for proper

treatment to prevent build-up of algae and

solids concentration

Clean and flush Cold Water Sump

!

!

!

!

!

20

!

!

!

!

Every

6 months

!


Terms and Conditions

1. Sale Not a Consumer Transaction: Buyer agrees

that the purchase of Delta’s Products (hereinafter

“Product”) is not for consumer, household or family

purposes.

2. Agreement of Sale: Acceptance: Any acceptance

contained herein is expressly made conditional on

Buyer’s assent to any terms contained herin that are

additional to or different from those proposed by

Buyer in its purchase order and hence any terms and

provisions of Buyer’s purchase order which are

inconsistent with the terms and conditions hereof

shall not be binding on the Seller. Unless Buyer shall

notify Seller in writing to the contrary as soon as

practicable after receipt hereof, acceptance of the

terms and conditions hereof by Buyer shall be

deemed made and, in the absence of such

notification the sale and shipment by the Seller of the

goods covered hereby shall be conclusively deemed

to be subject to the terms and conditions hereof.

3. Entire Contract: This contract constitutes the final

and entire agreement between Seller and Buyer and

any prior or contemporaneous understandings or

agreements, oral or written are merged herein.

The sales and technical representatives of the Seller

are not authorized to make warranties about the

product. Sellers representatives’ oral statements do

not constitute warranties, shall not be relied upon by

the Buyer, and are not part of the contract for sale.

Any product-literature and operating instructions, and

statements contained therein, do not constitute

warranties, shall not be relied upon by the Buyer and

are not part of the contract for sale. The entire

contract is embodied in this writing and no other

warranties are given beyond those set forth in this

contract. This writing constitutes the final written

expression of the parties agreement, and it is a

complete an exclusive statement of the terms of the

agreement.

4. Prices: Except where expressly agreed, all prices

are subject to change without notice. If there is a

delay in approval of drawings related to this contract

beyond 30 days, an escalation in selling price may

occur due to a rise in labor and/or material prices.

5. Taxes: The price of goods does not include sales,

use, excise, ad valorem, property or other taxes now

or hereinafter imposed, directly or indirectly by any

governmental authority or agency with respect to the

manufacture, production, sale, delivery, consumption

or use of goods covered by this contract. Buyer shall

pay such taxes directly or reimburse Seller for any

such taxes which it may be required to pay.

6. Payment: The specific terms of payment are as

specified in writing by Seller. If the Buyer shall fail to

make any payments in accordance with the terms

and provisions hereof, the Seller, in addition to its

other rights and remedies, but not in limitation

thereof, may, at its option, defer shipments or

deliveries hereunder, or under any other contract

with the Buyer, except upon receipt of satisfactory

security or of cash before shipment.

7. Shipment; Risk of Loss Title: The goods shall be

shipped FOB Seller’s shipping points. Risk of

loss shall pass to Buyer upon delivery to the carrier.

Title shall pass to Buyer on delivery to the carrier.

8. Delivery; Delays in Deliveries: The date of delivery

provided herein is an approximation based on

Seller’s best judgement. Seller shall be excused for

delay in delivery, may suspend performance and

shall under no circumstances be responsible for

failure to fill any orders when due to acts of God or of

the public enemy; fires; floods; riots; strikes, freight

embargos or transportation delays; shortage of labor;

inability to secure fuel; material supplies, or power at

curent prices or on account of shortages thereof; any

existing or future laws or acts of the Federal or of any

State Government (including specifically, but not

exlusively, any orders, rules or regulations issued by

any official or agency of any such government).

Form !t-1170, Effective 4/98

© 1980 Delta Cooling Towers

All Rights Reserved

9. LIMITED WARRANTY: Seller warrants that the

cylindrical, seamless molded polyethylene shell of

the Product shall be free from defects in materials

and workmanship and will not peel, chip, rust or need

painting for a period of fifteen (15) years from the

date of shipment. Since the Product once in

operation is under the sole control of the User, this

warranty is further subject to and shall be applicable

only if all of the following conditions are met:

a. The Product has been properly erected in

accordance with the Seller’s instructions and in

accordance with good installation practices;

b. Seller’s instructions and recommendations as to

operation and maintenance have been followed,

including those contained in the manual furnished

with the Product;

c. The Product has been used under normal

operating conditions;

d. The Product has not been affected by misuse,

neglect, accident or abrasion;

e. The User has not attempted or performed

corrective work on the Product without Seller’s

prior written consent; and

f. The Seller shall have received notice of any defect

no later than 10 days after User first has

knowledge of same.

Except where expressly noted otherwise, Seller

warrants all Product componets, other than moving

parts, against defects in workmanship and material

for a period of one (1) year from the date of

shipment, provided the equipment has been properly

manintained and operated under normal conditions.

Motors and blowers carry a normal manufacturer’s

one (1) year warranty against defects in

workmanship and materials beginning from the date

of shipment and subject to the same condtions of

proper use and operation as other components of the

Product. Bearings, pulleys, belts or other moving

parts and components are sold without any warranty.

10. DISCLAIMER OF ALL OTHER WARRANTIES AND

GUARANTEES: The aforesaid warranty is the

sole and only warranty or guarantee relating to

the product provided under this Agreement, and

is in substitution for, and in lieu of, any and all

other warranties, written or oral, expressed,

implied or statutory including any warranty of

merchantability or of fitness for a particular

purpose.

11. CORRECTION OF DEFECTS AS SOLE REMEDY:

If the Buyer/User gives the Seller written notice of

defects in the product within any period of warranty

described herein and the Seller’s inspection confirms

the existence of such defect, the Seller, at its option,

shall correct the defect or defects either by repair,

providing repair tools and instrutions, or replacement,

FOB Seller’s shipping point, or refund the purchase

price of the product. The remedies provided

Buyer/User herein for breach of Seller’s warranty

shall be exclusive.

No expense, liability or responsibility will be assumed

by the Seller for repairs made by other than Seller’s

agent without written authority from the Seller.

Remedial action, in the manner and for the period of

time provided above, shall constitute fulfillment of all

liabilities of Seller to the Buyer / User, and

Buyer/User’s sole remedy hereunder, whether based

on contract, tort or otherwise.

The sole purpose of stipulated exlusive remedy shall

be to provide the User with free repair and

replacement of defective parts in the manner

provided herein. This exclusive remedy shall not be

deeded to have failed of its essential purpose so long

as the Seller is willing and able to repair or replace

defective parts in the prescribed manner.

An action for breach of this limited warranty or any

other action otherwise arising out of this contract

must be commenced within one (1) year from the

date the right, claim, demand or cause of action shall

first occur, or be barred forever.

CONDITIONS OF SALE AND WARRANTY

12. STATEMENT OF BUYER/USER’S

RESPONSIBILITIES: It is the sole responsibility

of the Buyer/User, and not in any manner the

responsibility of the Seller, to test, control and

properly dispose of all discharges, both gaseous

and liquid, from the product to assure:

a. Compliance with all federal, state and

municipal (or any political subdivision

thereof) statutes, laws, codes, ordinances,

rules and regulations concerning the

environment, including but not limited to: The

Clean Air Act, 42 U.S.C. S7401 et seq.; The

Clean Water Act, 33 U.S.C. S1251 et seq.; The

Comprehensive Environmental Response,

Compensation and Liability Act, 42 U.S.C.

S9601 et seq.; The Toxic Substance Control

Act, 15 U.S.C. S2601 et seq.; The Resource

Conservation and Recovery Act, 42 U.S.C.

S6901 et seq.; The Safe Drinking Water Act, 21

U.S.C. S349 et seq.; The National

Environmental Policy Act, 42 U.S.C. S4321 et

seq.; Occupational Safety and Health Act, 29

U.S.C. S651 et seq.; together with any

amendments thereto and regulations

promulgated thereunder;

b. Adequate protection for the health and safety

of people, property, wildlife and environment;

and

c. Adequate protection for all persons, including

employees, coming in contact with the Product

and its discharges for all purposes including,

without limitation, installation, maintenance,

use and repair of the Product.

It is also the sole responsibility of the Buyer/User

to:

d. Maintain the Product in accordance with the

“Installation, Operating and Maintenance

Instructions”;

e. Comply with the maintenance checklist

contained in the “Installation, Operating and

Maintenance Instructions”; and

f. Periodically monitor and test the Product to

verify proper functioning, and to insure the

Product performs properly.

It is further the sole responsibility of the

Buyer/User to comply with all laws, codes, and

regulations relating to the Product and its use

and Seller makes no warranty or representation

with respect thereto.

Buyer/User assumes the responsibility for

providing and installing all devices required to

protect the health and safety of people, property,

wildlife and the environment.

Buyer/User acknowledges having read the

“Installation, Operating and Maintenance

Instructions”, including all warnings contained

therein, and is aware of the precautions

recommended for protection to the health and

safety of people, property, wildlife, and the

environment, including employees coming in

contact with the Product discharges.

Buyer/User assumes full responsibility to assure

proper use of the Product, including the

determination and control of what chemicals,

pollutants and toxic substances are introduced

into the product, and the determination and

control of all discharges from the Product.

13. DISCLAIMER OF TORT, CONTRACT,

STATUTORY AND ALL OTHER LIABILITY: The

Seller hereby disclaims all tort, contract or

statutory liability to the Buyer/User, and any

other basis of liability to Buyer/User regarding

claims for injury or damage to people, property,

wildlife, or the environment, including, without

limitation, claims of negligence, strict product’s

liability, breach of warranty (except the limited

warranties as provided in paragraph 9 entitled:

“Limited Warranty”), breach of contract or

violation of stature, law, ordinance, code, rule or

Delta Cooling Towers


egulation. Seller also disclaims any liability to

the Buyer/User in contribution or indemnification

for the Buyer/User’s liability or alleged liability to

any third person or entity for injury or damage to

people, property, wildlife or the environment.

Without limiting the generality of the foregoing,

Seller disclaims liability for all claims for

compensatory, consequential, incidental or other

damages and for damages for personal injury

and property damage, loss of use, revenue or

profit, injury to good will, inability to fulfill

contracts to third parties, other economic loss,

response costs and other environmental cleanup

costs or other damages arising out of the

actual, alleged or threatened discharge,

dispersal, release or escape of pollutants,

contaminants, hazardous waste, or liquid or

gaseous materials discharged from or through

the Product and any loss, cost or expense arising

out of any governmental or other direction or

request to test for, monitor, clean-up, remove,

contain, treat, detoxify or neutralize the

foregoing.

Seller also disclaims liability for all claims for

damages arising from the actual or alleged

violation of any federal, state, municipal (or

political subdivision thereof) statute, law,

ordinance, code, rule or regulation relating to the

environment, including but not limited to: The

Clean Air Act, 42 U.S.C. S7401 et seq.; The Clean

Water Act, 33 U.S.C. S1251 et seq.; The

Comprehensive Environmental Response,

Compensation and Liability Act, 42 U.S.C. S9601

et seq.; The Toxic Substances Control Act, 15

U.S.C. S2601 et seq.; The Resource

Conservation and Recovery Act, 42 U.S.C. S6901

et seq.; The Safe Drinking Water Act, 21 U.S.C.

S349 et seq.; The National Environment Policy

Act, 42 U.S.C. S4321 et seq.; Occupational Safety

and Health Act, 29 U.S.C. S651 et seq.; together

with any amendments thereto and regulations

promulgated thereunder.

Seller further disclaims any liability, direct or

indirect, resulting from the Buyer/User’s failure to

fulfill the responsibilities enumerated in the

proceeding paragraph entitled “Statement of

Buyer/User’s Responsibility” including without

limitation:

a. Buyer/User’s failure to comply with statutes,

laws, codes, rules and regulations relating to

the Product and the environment; and

b. Buyer/User’s failure to provide and install all

devices required for the protection of the

safety and health of people, property, wildlife

and the environment and all persons, including

employees of the User coming in contact with

the Product and its discharges; and

c. Buyer/User’s failure to adhere to the

“Installation, Operating and Maintenance

Instructions” and the product literature,

including all warning contained therein;

d. Buyer/User’s failure to test and monitor the

functioning of the Product; and

e. Buyer/User’s failure to determine and control

the safety and cleanliness of discharged

effluents, both gaseous and liquid, from the

Product.

14. EXCULPATORY AND INDEMNIFICATION

AGREEMENT: Buyer/User hereby agrees that the

Seller will not be liable to the Buyer/User for the

matters reffered in paragraph 13 entitled “Disclaimer

of Tort, Contract, Statutory and All Other Liability.”

This exculpatory agreement applies even if the

defect and/or loss, damage or injury to persons,

property, wildlife and the environment resulted solely

or in part from the Seller’s actualor alleged

negligence, breach of warranty, violation an statute,

law, ordinance, rule or regulatio, or actions resulting

in strict liability.

The Buyer/User hereby agrees to defend, hold

harmless and indemnify the Seller and Seller’s

agents from and against all claims, suits, actions,

and liabilities for injury or damage to people,

property, wildlife, or the environment, including,

without limitation, claims of negligence, strict

products liability, breach of warranty (except the

limited warranties provided in paragraph 9 entitled

“Limited Warranty”), breach of contract or violation of

statute, law, ordinance, code, rule or regulation.

The Buyer/User hereby agrees to defend, hold

harmless and indemnify the Seller and Seller’s

agents from and against all claims, suits, and actions

including claims for contribution or imdemnification

for another’s liability or alleged liability to any third

person or entity for injury or damage to people,

property, wildlife or the environment.

Without limiting the generality of the foregoing, the

Buyer/User hereby agrees to defend, hold harmless

and idemnify the Seller and Seller’s agents from and

against all claims, suits, actions, and liabilities for

compensatory, consequential, incidental or other

damages and for damages for personal injury and

property damage, loss of use, revenue or profit,

injury to good will, inability to fulfill contracts to third

parties, other economics loss, reponse costs and

other environmental clean-up cost or other damages

arising out of the actual, alleged or threatened

discharge, dispersal, release or escape of pollutants,

contaminants, hazardous waste, or liquid or gaseous

materials discharged from or through the Product

and any loss, cost or expense arising out of any

governmental or other direction or request to test for,

monitor, clean-up, remove, contain, treat, detoxify or

neutralize the foregoing.

The Buyer/User hereby agrees to defend, hold

harmless and indemnify the Seller and Seller’s

agents from and against all claims, suits, actions,

and liabilities for damages arising from the actual or

alleged violation of any federal, state, municipal (or

political subdivision thereof) statute, law, ordinance,

code, rule or regulation relating to the environment,

including but not limited to: The Clean Air Act, 42

U.S.C. S7401 et seq.; The Clean Water Act, 33

U.S.C. S1251 et seq.; The Comprehensive

Environmental Response, Compensation and

Liability Act, 42 U.S.C. S9601 et seq.; The Toxic

Substances Control Act, 15 U.S.C. S2601 et seq.;

The Resource Conservation and Recovery Act, 42

U.S.C. S6901 et seq.; The Safe Drinking Water Act,

21 U.S.C. S349 et seq.; The National Environment

Policy Act, 42 U.S.C. S4321 et seq.; Occupational

Safety and Health Act, 29 U.S.C. S651 et seq.;

together with any amendments thereto and

regulations promulgated thereunder.

The Buyer/User hereby agrees to defend, hold

harmless and indemnify the Seller and Seller’s

agents from and against all claims, suits, actions,

and liabilities, direct or indirect, resulting from the

Buyer/User’s failure to fulfill the responsibilities

enumerated above in number 12 entitled “Statement

of Buyer/User’s Responsibilities” as if the Buyer were

the User as referred to therein, including without

limination:

a. Buyer/User’s failure to comply with statutes, laws,

codes, rules and regulations relating to the

Product and the environment; and

b. Buyer/User’s failure to provide and install all

devices required for the protection of the safety

and health of people, property, wildlife and the

environment and all persons, including

employeesof the User coming in contact with the

Product and its discharges; and

c. Buyer/User’s failure to adhere to the “Installation,

Operating and Maintenance Instructions” and the

product literature, including all warning contained

therein;

d. Buyer/User’s failure to test and monitor the

functioning of the Product; and

e. Buyer/User’s failure to determine and control the

safety and cleanliness of discharged effluents,

both gaseous and liquid, from the Product.

The Buyer/User hereby agrees to defend, hold

harmless and indemnify the Seller and Seller’s

agents from and against all claims, suits, actions,

and liabilities as enumerated above without limitation

even if said claims, suits, actions, and liabilities are

based upon actual or alleged negligence, breach of

warranty (other than the limited warranty provided in

paragraph 9 entitled: “Limited Warranty”), violation of

any law, statute, ordinance, rule or regulation, or any

other basis of liability on the part of Seller or Seller’s

agents.

15. Assignment: No right or interest in this contract shall

be assigned by Buyer/User without prior written

agreement by the Seller. No delegation of any

obligation by the Buyer/User shall be made without

prior written agreement by the Seller.

16. Modifications; waiver: No Waiver, alteration or

modification of any of the provisions hereof shall be

binding on the Seller unless made in writing and

agreed to by a duly authoried official of the Seller.

No waiver by the Seller of any one or more defaults

by the Buyer/User in the performance of any

provision of this contract shall perate or be construed

as a waiver of any future default or defaults whether

of a like or of a different character.

17. Changes & Improvements: Seller reserves the

right to make changes, and improvements in its

Products at any time without notice. Where such

change and improvements have been made, Seller

shall not be obligated to incorporate such changes

and improvements in Products previously sold to any

customer, nor shall Seller be obligated to replace

previously sold products with products incorporating

such changes and improvements.

18. Return of Goods: Where Seller has provided prior

written authorization, Seller will accept the return for

credit or exchange of products which have been

made to the specifications set forth in its catalogs

and other literature, provided the product has not

been altered or damaged. Products returned for

credit will be subject to a 20% restocking charge.

Return products must be shipped prepaid to Seller at

the location noted in written authorization.

19. Technical Services: Upon request of Buyer/User,

Seller will endeavor to furnish such technical advice

as it has available in reference to the use of its

products. Any technical advise furnished by Seller

with reference to the use of its products is given and

accepted at Buyer/User’s risk and the Seller

assumes no obligation or liability for the advice given

or results obtained.

20. APPLICABLE LAW: The validity, interpretation and

performance of all terms, conditions, warranties,

disclaimers, indemnification and exculpatory

provisions, and all other provisions described herein,

and any purchase or sale made hereunder shall be

governed by the law of New Jersey in force at the

date this contract is made. Where not modified by

the terms herein, the provision of Article 2 of the

Uniform Commercial Code as enacted by the State

of New Jersey shall apply to this transaction.

21. SEVERABILITY: If any provision or clause of this

contract or application thereof to any person or

circumstances is held invalid or unconscionable such

invalidity or unconscionability shall not affect other

provisions or applications of the contract which can

be given effect without the invalid or unconscionable

provision or application, and to this end the

provisions of the contract are declared to be

severable.

22. WAIVER: If the Seller, at its option, agrees to a

waiver of any of the terms and conditions recited

herein, such waiver shall not for any purpose be

construed as a waiver of any succeeding breach of

the same or any other terms or conditions of said

contract; nor shall such a waiver be viewed as a

course of performance.

23. BUYER/USER’S ACKNOWLEDGMENT:

User/Buyer acknowledges that he has read both

sides of this contract and accepts its terms.

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