REP - Evapco

® 

C O O L I N G T O W E R S 

IDEAL REPLACEMENT UNITS 

Mr. GoodTower ® 

A DVANCED T ECHNOLOGY IN 

INDUCED DRAFT, COUNTERFLOW COOLING TOWERS 

E ASY S OLUTIONS...BETTER C HOICES!

TWO CELL END INLET COOLING TOWERS 

IDEAL REPLACEMENT FOR CROSSFLOW UNITS 

MODELS REP 217-111 TO REP 224-920 / 367-1600 NOMINAL TONS 

LOW INSTALLATION COSTS - CONTRACTOR SAVINGS 

The REP’s fit tight enclosures and match up with crossflow layouts, piping, and steel, while still offering 

the maintenance and operational advantages of EVAPCO’s induced draft counterflow cooling towers. 

Layout Savings 

The REP counterflow method of heat transfer is the most efficient in the industry, resulting in a plan area up to 35% 

less than a comparable sized crossflow tower. The REP’s smaller plan area enables it to be located in smaller, less 

costly enclosures. 

REP units draw air from all four sides, so it is ideal for tight replacement projects. The REP can be placed close to a 

surrounding wall with little or no effect on unit capacity. The REP ’s are ideal for matching existing crossflow layouts. 

Piping Savings 

All piping connections are on one end, thereby reducing piping costs and installation time. Conventional doubleflow 

crossflow cooling towers require two water inlet connections per cell. The counterflow REP design requires only one 

inlet connection per cell, thereby significantly reducing the expensive piping, piping support and flow balancing 

valves required with the crossflow design. The pressurized water distribution system in REP units do not require flow 

balancing valves. 

Typical (2) Cell Crossflow Piping 

REP Simplified Piping 

Steel Savings 

The two cell REP units may be supported in two ways - see Option A and B below. In Option A, the two cells are supported 

by three steel “I” beams running the entire length of the units. In Option B, the two cells are supported by 

two steel “I” beams running across the width of the cells. Option B matches the typical crossflow supporting steel 

arrangement. This flexibility enables REP units to sit on the existing structural steel for most replacement projects, 

thereby resulting in lower installation costs. 

Option A 

Option B 

UNIT OUTLINE 

UNIT 

OUTLINE 

STRUCTURAL BEAM 


Operating Weight Savings 

The operating weight of REP units are approximately 35% less than conventional crossflow cooling towers. Due to 

the REP basin design and smaller plan area, less water is held in the unit during normal operation. Therefore, the 

structural support costs are reduced, and it is possible to locate the REP on a lighter roof, providing greater location 

flexibility. 

2

TWO CELL END INLET COOLING TOWERS 

IDEAL REPLACEMENT FOR CROSSFLOW UNITS 

MODELS REP 217-111 TO REP 224-920 / 367-1600 NOMINAL TONS 

LOW OPERATING COSTS - OWNER SAVINGS 

Horsepower Savings 

The fan motor horsepower of REP Cooling Towers is typically equal to or less than other manufacturers’ fan motor 

horsepower. Reduced horsepower selections can save thousands of dollars in energy costs per year. 

The two cell REP’s have two fan motors, thereby providing mechanical redundancy and multiple steps of capacity 

control. For additional energy savings, two speed motors are recommended. 

When replacing centrifugal fan cooling towers, REP units will typically reduce the horsepower by as much as 50%. 

Maintenance Savings 

REP units have the most serviceable cold water basin in the industry. Removal of the light-weight inlet louvers provides 

easy access to all four sides of the basin for maintenance. 

Access to the fan and water distribution system is from the side of the unit. Routine maintenance can be safely 

performed by standing on the EVAPCO fill, which acts as a working platform. 

Totally enclosed fan motors are positioned for external access. Belt tensioning is performed from the outside of 

the unit. Bearing lube lines are also extended to the outside of the unit for easy service. 

Maintenance on REP towers is simple and easy. Maintenance costs are kept to a minimum. 

Water & Chemical Savings 

The stair step design of the REP pan basin significantly reduces the water volume in the unit (up to 35%) compared 

to crossflow equipment. 

The drift rate for REP Towers is less than .001% of the recirculated water rate. The typical crossflow drift rate is 

.005%. For a 500 ton tower, EVAPCO’s annual water savings from drift alone is 14,976 gallons. Also, the two pass 

inlet louver design eliminates splashout and water loss. 

The induced draft counterflow REP design with the two pass inlet louvers block direct sunlight from entering the 

unit, thereby reducing the potential for algae formation and reducing chemical costs. 

Exclusive Five Year Warranty 

All EVAPCO REP units come with a standard five year motor and drive warranty. Included 

are all drive components on belt and gear drive units. This unique warranty is designed to 

offer the end user optimum protection against fan drive and motor failure. REP units with 

stainless steel construction also have an exclusive Five Year complete product warranty. 

LOW INSTALLATION COST + LOW OPERATING COST = 

REP TOWERS: THE IDEAL REPLACEMENT TOWER 

3

ENGINEERING DATA & DIMENSIONS 

MODELS REP 217-111 to REP 217-914 

19-5/8" 

8 BFW/GROOVED 

INLET 

8 BFW/GROOVED 

INLET 

2" 

ACCESS 

DOOR 

ACCESS 

DOOR 

55-1/2" 

50-3/4" 

H 

P 

B 

(2)3 MPT OVERFLOW 

(2)8 BFW/GROOVED 

OUTLET 

(2)2 MPT 

MAKE-UP 

(2)3 MPT 

DRAIN 

5-1/8" 

13/16" 

17' 4-1/8" 

23-1/8" 

15" 

7-1/2" 

63-3/4" 3/8" 

3-1/2" 

80-1/4" 

96-13/16" 

101-1/2" 

L 

Weights (LBS) 

Dimensions 

Fan 

Air 

Model Heaviest Motor Flow 

No. Shipping Operating Section (HP) (CFM) H † B P L 

REP 217-111 8700 15300 2220 (2) 7-1/2 91832 11’ 8-1/4” 7’ 3/4” 7’ 8-3/8” 10’ 5-1/4” 

REP 217-211 9340 15940 2540 (2) 7-1/2 90549 12’ 8-1/4” 8’ 3/4” 8’ 8-3/8” 10’ 5-1/4” 

REP 217-311 9400 16000 2540 (2) 10 99199 12’ 8-1/4” 8’ 3/4” 8’ 8-3/8” 10’ 5-1/4” 







Weights (LBS) 

Dimensions 

Fan 

Air 









Weights (LBS) 

Dimensions 

Fan 

Air 



REP 217-214 11580 20600 3180 (2) 15 137823 13’ 2-1/4” 8’ 6-3/4” 9’ 2-3/8” 13’ 11-3/4” 








Note: (1) An adequately sized bleed line must be installed in the cooling tower system to prevent build-up of impurities in the recirculated water. 

(2) Do not use catalog drawings for certified prints. Dimensions subject to change. 

(3) Connections larger than 3” are Beveled for Welding (BFW) and grooved for a mechanical coupling. 

(4) Adequate spacing must be allowed for access to the cooling tower. 

(5) Unit can operate as two (2) independent cells with the addition of a 

flume plate or water tight partition. 

† Height includes fan guard which ships factory mounted. 

4

THERMAL PERFORMANCE 

REP 217-111 to REP 217-911 

Temp 

Cooling Capacity in GPM 

EWT 90° 95° 90° 95° 95° 90° 95° 95° 95° 100° 

Model Motor LWT 80° 80° 80° 80° 85° 80° 80° 85° 85° 85° 

No. HP WB 68° 68° 70° 70° 70° 72° 72° 72° 75° 75° 

REP 217-111 (2) 7-1/2 1372 1032 1197 902 1798 1018 774 1653 1390 1058 


REP 217-311 (2) 10 1589 1237 1408 1100 2018 1221 966 1872 1608 1265 







Temp 


EWT 95° 100° 95° 97° 100° 102° 95° 96° 100° 102° 


No. HP WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 











Temp 


EWT 90° 95° 90° 95° 95° 90° 95° 95° 95° 100° 


No. HP WB 68° 68° 70° 70° 70° 72° 72° 72° 75° 75° 






REP 217-912 (2) 30 2484 1997 2231 1817 * 1976 1642 2896 2510 2035 

Temp 


EWT 95° 100° 95° 97° 100° 102° 95° 96° 100° 102° 


No. HP WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 







*Flow exceeds maximum hydraulic limit. 


Temp 


EWT 90° 95° 90° 95° 95° 90° 95° 95° 95° 100° 


No. HP WB 68° 68° 70° 70° 70° 72° 72° 72° 75° 75° 









Temp 


EWT 95° 100° 95° 97° 100° 102° 95° 96° 100° 102° 


No. HP WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 









To Make a Selection: Locate the column with the desired operating temperature conditions. Read down the column until you find the GPM 

equal to or greater than the flow required. Read horizontally to the left to find the model number of the unit that will perform the duty. 

For selections and conditions other than those stated, consult your EVAPSPEC II Selection Program or local EVAPCO representative. 

5

ENGINEERING DATA & DIMENSIONS 


7" 

ACCESS 

DOOR 

ACCESS 

DOOR 

(2)10 BFW/GROOVED 

INLET 

71" 

2" 

T 

H 

P 

98-1/2" 

(2)2 MPT 

MAKE-UP 

25-1/8" 

17" 

3-1/2" 

96-7/8" 

117-7/8" 

137-1/4" 

(2)3 MPT OVERFLOW 

8-1/2" 

*(2)10 BFW/GROOVED OUTLET 

(2)3 MPT DRAIN 

5-1/8" 

7/8" 

1-3/8" 

L 

142" 

24' 1-1/8" 

Weights (LBS) 

Dimensions 

Fan 

Air 


No. Shipping Operating Section (HP) (CFM) H † T P L 

REP 224-018 19580 39600 6810 (2) 25 258400 16’ 6-1/2” 8’ 4” 11’ 1-1/4” 18’ 





REP 224-518 22840 42860 8440 (2) 30 264800 18’ 6-1/2” ††10’ 4” 13’ 1-1/4” 18’ 





Weights (LBS) 

Dimensions 

Fan 

Air 


No. Shipping Operating Section (HP) (CFM) H † T P L 




Note: (1) An adequately sized bleed line must be installed in the cooling tower system to prevent build-up of impurities in the recirculated water. 

(2) Do not use catalog drawings for certified prints. Dimensions subject to change. 

(3) Connections larger than 3” are Beveled for Welding (BFW) and grooved for a mechanical coupling. 

(4) Adequate spacing must be allowed for access to the cooling tower. 

(5) Unit can operate as two (2) independent cells with the addition of a flume plate or water tight partition. 

† Height does not include fan guard. 

†† Fan guard ships loose for field mounting. 

* (2)12” BFW/Grooved Outlet on models 224-720 thru 224-920. 

6

THERMAL PERFORMANCE 


Temp 

Tower Capacity in USGPM at the Following Temperature Conditions (°F) 

EWT 90° 95° 90° 95° 95° 90° 95° 95° 95° 100° 


No. HP WB 68° 68° 70° 70° 70° 72° 72° 72° 75° 75° 










REP 224-918 (2) 60 5519 4436 4955 4037 * 4390 3648 6433 5578 4520 

Temp 


EWT 95° 100° 95° 97° 100° 102° 95° 96° 100° 102° 


No. HP WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 










AT 224-918 (2) 60 5287 4313 4658 5565 3860 3673 3919 4369 3325 3180 

*Flow exceeds maximum hydraulic limit. 


Temp 


EWT 90° 95° 90° 95° 95° 90° 95° 95° 95° 100° 


No. HP WB 68° 68° 70° 70° 70° 72° 72° 72° 75° 75° 




Temp 


EWT 95° 100° 95° 97° 100° 102° 95° 96° 100° 102° 


No. HP WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 




To Make a Selection: Locate the column with the desired operating temperature conditions. Read down the column until you find the GPM equal to or greater 

than the flow required. Read horizontally to the left to find the model number of the unit that will perform the duty. 

For selections and conditions other than those stated, consult your EVAPSPEC II Selection Program or local EVAPCO representative. 

7

STRUCTURAL STEEL SUPPORT 


L 

Option A: Suggested Three “I” Beam Arrangement 

W 

5-1/8" 

Gap 

Dimension 

End Elevation 

Plan View 

Three “I” Beams Required (By Others) 

Dimensions 

Model No. W L 

REP 217-111 to 911 17’ 4-1/8” 10’ 5-1/4” 



REP 224-018 to 918 24’ 1-1/8” 18’ 0” 

REP 224-720 to 920 24’ 1-1/8” 20’ 0” 


Option B 

Option B: Suggested Two “I” Beam Arrangement 

In Option B, the two cells are supported by two steel “I” beams 

running across the width of the cells. 

Consult your EVAPCO representative for this alternate steel 

support and factory certified steel support drawings. 

UNIT 

OUTLINE 


Notes: 

Models REP 217-111 through 224-920 

1. These are suggested arrangements for preliminary layout purposes. Consult your EVAPCO representative for factory certified steel support 

drawings. 

2. The recommended support for option A is structural “I” beams located under the outer flanges and running the entire length of the 

unit. The unit should be elevated to allow access underneath the unit and to the roof below. Mounting holes, 3/4” in diameter, are 

located in the bottom flanges of the pan to provide for bolting to the structural steel. 

3. Beams should be sized in accordance with accepted structural practices. Maximum deflection of beam under unit to be 1/360 of the unit 

length, not to exceed 1/2”. 

4. Beams should be level before setting the unit in place. Do not level the unit by shimming between it and the “I” beams. 

5. Support beams and anchor bolts are to be furnished by others. 

6. Dimensions, weights and data are subject to change without notice. Refer to the factory certified drawings for exact dimensions. 

7. For alternate layout arrangements please consult the factory. NOTE: OPTIONAL BOTTOM CONNECTIONS WILL REQUIRE THE UNIT TO BE 

ELEVATED TO ALLOW FOR PIPING. 

8

APPLICATIONS 

System Design 

REP Cooling Towers are constructed of heavy duty materials 

and are designed for superior performance providing 

long, trouble-free operation. However, proper equipment 

selection, installation and maintenance is necessary 

to ensure optimum unit performance. Several of the 

major considerations when designing and operating a 

cooling tower installation are presented in the following 

paragraphs. For additional information, contact your 

local EVAPCO representative. 

Air Circulation 

The location of a cooling tower is an important consideration 

when reviewing system design. Since cooling towers 

consume large quantities of air, adequate spacing 

around the unit is necessary for it to perform properly. 

The best place to locate any cooling tower is on a roof or 

at ground level away from walls and other obstructions. 

Cooling towers that are located in wells, enclosures, or 

are adjacent to high walls must be properly located to 

avoid the effects of recirculation. Recirculation occurs 

when some of the hot moist discharge air leaving the 

cooling tower flows back into the fresh air inlet. When 

recirculation causes the inlet wet bulb temperature to the 

cooling tower to be increased, the capacity of the cooling 

tower is decreased. Refer to EVAPCO Bulletin 311, 

Equipment Layout Manual, for the recommended layout 

guidelines for cooling towers. 

Maintaining the Recirculated Water System 

A cooling tower removes heat by evaporating a portion 

of the recirculated spray water. As a general rule, a cooling 

tower evaporates 3 US GPM per 100 tons of cooling 

capacity. As this water evaporates, it leaves behind all of 

its mineral content and impurities. Therefore, it is important 

to bleed an amount equal to that which is evaporated 

to prevent the buildup of impurities. If this is not 

done, the mineral content in the water will increase until 

the solids eventually deposit in the unit, causing heavy 

scaling. The bleed line should be installed in the external 

piping of the unit. It must be properly sized for the 

application and be provided with a metering valve and 

flow measurement device to allow for field adjustment of 

the bleed rate. 

Water Treatment 

EVAPCO recommends that all cooling tower users should 

consult with a reputable water treatment company familiar 

with local water conditions in order to determine the 

extent and type of water treatment program recommended 

for each specific application. Any chemical 

water treatment used must be compatible with the galvanized 

construction of the unit. If acid is used for treatment, 

it should be accurately metered and the concentration 

properly controlled. The pH of the water should be 

maintained between 6.5 and 8.0. In order to prevent 

“white rust”, the galvanized steel in the unit may require 

routine passivation of the steel when the system is operating 

in the higher pH levels. 

Batch chemical feeding is not recommended because it 

does not afford the proper degree of control. If acid 

cleaning is required extreme caution must be exercised 

and only inhibited acids compatible with galvanized steel 

construction should be used. Consult EVAPCO’S 

Maintenance Bulletin 112 for additional information. 

Capacity Control 

The design wet bulb temperature for which a cooling 

tower is sized occurs only a small percentage of the time. 

Since the wet bulb temperature is lower than design 

much of the time, and cooling loads tend to fluctuate, 

some form of capacity control will be required. The simplest 

form of capacity control is to cycle the fans on and 

off. However, this type of control results in larger temperature 

differentials and does not provide close control 

of the leaving water temperature. 

A better method of capacity control is to use two speed 

fan motors, which add a second step of control. Two 

speed motors are an excellent method of capacity control 

for the REP Cooling Tower. This arrangement gives 

capacity steps of 10% (fans off), 60% (Fans at half speed) 

and 100%. A temperature controller can be supplied to 

set control at 5& F increments, so that close temperature 

control can be maintained without excessive cycling of 

the fan motor. 

Two speed motors also reduce operating costs. At half 

speed, the motor draws approximately 15% of the full 

load power. Since the maximum wet bulb temperature 

and maximum load very seldom coincide, the cooling 

tower will actually operate at half speed about 80% of 

the time. Therefore, power costs will be reduced by 85% 

during the major portion of the year. 

A third advantage of two speed motors is that noise levels 

are reduced by approximately 6 dB when operating at 

half speed. Since both the load and wet bulb temperature 

are normally lower at night, the sound generated by 

the cooling tower will be substantially reduced during 

the most noise sensitive time period. 

For multiple cell units, both fan cycling and two speed 

motors can be used to provide additional steps of control. 

The combination of fan cycling and two speed motors 

offers a simple and inexpensive means of controlling unit 

capacity along with substantially reducing the energy 

costs of the cooling tower. 

Piping 

Cooling tower piping should be designed and installed in 

accordance with generally accepted engineering practices. 

All piping should be supported by properly designing 

hangers and supports with allowances made for possible 

expansion and contraction of the piping system. No 

external loads should be placed on the cooling tower 

connections. Do NOT anchor any of the piping supports 

to the cooling tower or its framework. 

Control of Biological Contamination 

Water quality should be checked regularly for biological 

contamination. If biological contamination is detected, a 

more aggressive water treatment and mechanical cleaning 

program should be undertaken. The water treatment 

program should be performed by a qualified water treatment 

company. It is important that all internal surfaces 

be kept clean of accumulated dirt and sludge. In addition, 

the drift eliminators should be checked periodically 

to ensure that they are clean and have not been damaged. 

Note: The location of the cooling tower must be considered 

during the equipment layout stages of a project. It 

is important to prevent the discharge air (potential of 

biological contamination) from being introduced into the 

fresh air intakes of the building. 

9

APPLICATIONS 

Special Applications of the REP Cooling Tower 

The REP Cooling Tower is designed for all air conditioning and industrial cooling applications. There are some design 

situations where special consideration must be given for the type and size of unit selected, such as, materials of construction, 

thermal performance, water quality, unit layout and local fire codes. Some of these special applications are 

described below. 

Freecooling 

Freecooling allows chilled water to be produced by the 

cooling tower without the use of a mechanical chiller 

during low ambient conditions. The freecooling or 

economizer mode of an air conditioning system is used 

to save $/KWH when the conditions allow the water in 

the tower to be cooled to “chiller” like temperatures, 

typically 42-45F LWT. 

EVAPCO’s counterflow cooling towers are well suited for 

free cooling applications. The counterflow fill design 

helps prevent ice formation with its even temperature 

gradient through the fill section and enclosed location 

blocking it from the elements. However, special caution 

must be taken when selecting, sizing and operating a 

cooling tower during normal winter or severe winter 

applications. 

Please consult EVAPCO’s Engineering Bulletin on Free 

Cooling Operation of Open Cooling Towers to assist in 

selecting a tower for a freecooling application. 

High Temperature Applications 

EVAPCO’s REP Cooling Tower as standard is capable of 

handling up to 130°F entering water temperature, which 

is higher than most crossflow cooling tower fill sheets. It 

will not deform or degrade at a continuous temperature 

application of 130°F. 

However, there are applications where a higher temperature 

rated fill is required. For these applications, a fill 

material is available as an option which allows the entering 

water temperature to operate at a continuous 150°F. 

Please consult the factory for selections of higher temperature 

fill Cooling Towers. 

Rigging Guidelines 

The rigging requirements of the REP Cooling Tower are 

covered in EVAPCO’s Rigging Bulletins which are available 

from your local EVAPCO Representative or the factory. 

Consult Bulletin# 148. 

These guidelines cover recommended lifting methods for 

the top and bottom sections of the cooling tower and 

how to mate the sections together. In addition, installation 

instructions for the flume box, flume plate, vertical 

& horizontal splash guards (multi-cell units only) fan 

screens and motor/gearbox davits are also provided. 

Consult the Factory or your local EVAPCO 

representative for: 

Layout Guidelines 

Bypass Connection Sizing and Location 

Equalizer Connection Sizing and Location 

Remote Sump Connection Sizing and Location 

Cooling Water Contribution to Remote Sump Tanks 

Field Thermal Performance Tests 

Seismic and Wind Load Applications 

Operating and Maintenance Questions 

Pan Heater Sizing for Low Ambient Operation 

Factory Mutual 

Vibration Isolation 

Dirty Water Applications 

The EVAPAK ® fill used in the REP Cooling Tower is 

designed to operate in almost all cooling water applications. 

However, there are some “dirty” water applications 

where the standard fill spacing is not adequate, 

such as a pulp and paper mill cooling tower or other 

application where heavy particulate will be mixed in 

with the water. 

Please consult the factory for a special cooling tower 

selection (for this application) utilizing EVAPCO’s 

exclusive EF19 and EVF 19 anti-fouling fill. 

10

MECHANICAL SPECIFICATIONS 

Furnish and install as shown on the plans an EVAPCO Model 

__________ induced draft counterflow cooling tower. Each unit 

shall have the capacity to cool __________ GPM of water from 

__________ ˚F to __________ ˚F with a __________ ˚F entering wet 

bulb temperature. 

Pan 

The pan shall be constructed of G-235 hot-dip galvanized steel 

for long life and durability. G-235 hot-dip galvanized steel designates 

an average coating thickness of 2.35 ounces of zinc per 

square foot on the steel. Standard pan accessories shall include 

overflow, drain, anti-vortexing hood, Type 304 Stainless Steel 

strainers, and brass make-up valve with plastic float. The entire 

pan area shall incorporate a stepped configuration for reduced 

water volume, lower operating weight and easier pan maintenance. 

The upper and lower pan bottoms shall be sloped to provide 

positive drainage of the complete basin section. Depressed 

side outlet sumps which are not an integral part of the basin 

shall not be acceptable. 

Casing 

The casing shall be constructed of G-235 hot-dip galvanized steel. 

The casing panels shall totally encase the sides of the fill section 

to protect the surface from direct atmospheric contact. 

Water Piping Connections 

All water piping connections, such as the inlet, outlet, overflow, 

make-up and drain connections are to be located on the same 

side to minimize piping costs and to reduce installation time. 

Models REP 217-111 to 217-914 Fan Motor(s) 

__________ HP totally enclosed fan cooled (T.E.F.C.) ball bearing 

fan motor(s) with 1.15 service factor shall be furnished suitable 

for cooling tower service on __________ volts, __________ hertz, 

and __________ phase. Motor(s) shall be mounted on an 

adjustable base which is mounted on the side of the unit for 

service. A hinged protective cover shall shield the motor and 

sheave from the weather. 

Drive 

The fan drive shall be a multigroove, solid back V-belt type with 

taper lock sheaves designed for 150% of the motor nameplate 

horsepower. The belt material shall be neoprene reinforced 

with polyester cord and specifically designed for cooling tower 

service. A hinged protective cover shall shield the motor and 

sheave from the weather. Belt adjustment shall be accomplished 

from the exterior of the unit. Bearing lube lines shall be extended 

to the exterior of the unit for easy maintenance. All sheaves 

located in the airstream shall be constructed of aluminum alloy, 

vented guards shall not be acceptable. If internal belt adjustment 

is necessary, an internal working platform and ladder is 

required to access the drive system. 

Models REP 224-018 to 224-920 

Fan Motor(s) 

__________ HP totally enclosed air over (T.E.A.O.) ball bearing 

fan motor(s) with 1.15 service factor shall be furnished suitable 

for cooling tower service on __________ volts, __________ hertz, 

and __________ phase. Motor(s) shall be mounted on an 

adjustable base which allows the motor to swing to the outside 

of the unit for servicing. 

Drive 

The fan drive shall be a multigroove, solid back V-belt type 

with taper lock sheaves designed for 150% of the motor nameplate 

horsepower. The belt material shall be neoprene reinforced 

with polyester cord and specifically designed for cooling 

tower service. Fan and motor sheaves shall be aluminum alloy 

construction. Belt adjustment shall be accomplished from the 

exterior of the unit. Bearing lube lines shall be extended to the 

exterior of the unit for easy maintenance. All sheaves located 

in the airstream shall be constructed of aluminum alloy, vented 

guards shall not be acceptable. If internal belt adjustment is 

necessary, an internal working platform and ladder is required 

to access the drive system. 

for single source responsibility and reliability. The fans shall be 

constructed of extruded aluminum alloy blades, installed in a 

closely fitted cowl with venturi air inlet for maximum fan efficiency. 

Each fan blade shall be individually adjustable. Fan cowl 

shall be covered with a heavy gauge hot dip galvanized wire fan 

guard. 

Fan Shaft Bearings 

Fan shaft bearings shall be heavy duty self-aligning ball type 

with self locking collars and grease fittings extended to the outside 

of the unit. Bearings shall be designed for a minimum L-10 

life of 75,000 hours. 

Fan Drive Warranty 

Cooling tower fan drive components shall be covered by a five 

year manufacturer’s plan. Drive components protected by this 

warranty shall include the fans, bearings, fan shafts, drive 

sheaves and fan motors. 

Fill 

The cooling tower fill shall be PVC (Polyvinyl Chloride) of crossfluted 

design for optimum heat transfer efficiency. The crossfluted 

sheets shall be bonded together for strength and durability. 

The fill shall be fabricated, formed and installed by the cooling 

tower manufacturer and shall be elevated a minimum of 4 feet 

above the floor of the cold water basin to facilitate cleaning. The 

fill shall be suitable for use as a working platform. The PVC fill 

shall be self-extinguishing for fire resistance with a flame spread 

rating of 5 per ASTM E84-81a. It shall also be resistant to rot, 

decay and biological attack. The fill shall be able to withstand a 

water temperature of 130°F. 

Water Distribution System 

The spray header and branches shall be constructed of Schedule 

40 polyvinyl chloride (PVC) pipe for corrosion resistance and shall 

have a steel connection which is either beveled for weld/grooved 

for a mechanical coupling to attach the external piping. The 

spray header and branches shall be removable for cleaning purposes 

and have threaded end caps to allow debris to be 

removed. The water shall be distributed over the fill by precision 

molded ABS spray nozzles with large 3/8 by 1 inch orifice openings 

and integral sludge ring to eliminate clogging. The nozzles 

shall be threaded into the water distribution piping to assure 

positive positioning. If open type gravity distribution pans are 

used, they shall be constructed of stainless steel or FRP. 

Handrails and a ladder to the top of the tower must be provided 

for servicing the distribution pans. 

Eliminators 

The eliminators shall be constructed entirely of inert polyvinyl 

chloride (PVC) in easily handled sections and be completely separate 

from the fill section for maximum efficiency. The eliminator 

design shall incorporate three changes in air direction to assure 

removal of all entrained moisture from the discharge air stream. 

Maximum drift rate shall be less than .001% of the circulating 

water rate. 

Air Inlet Louver Screens 

The louvers screens shall be constructed of polyvinyl chloride 

(PVC) and mounted in easily removable frames on all four sides 

of the cooling tower for access to the entire basin area for maintenance. 

The louvers shall have a minimum of two changes in air 

direction to prevent splashout, block direct sunlight from entering 

the basin, and have a minimum 3/4” opening to prevent 

debris from entering the basin. 

Finish 

All pan and casing material shall be constructed of G-235 heavy 

gauge mill hot-dip galvanized steel for maximum protection 

against corrosion. During fabrication, all panel edges shall be 

coated with a 95% pure zinc-rich compound. 

Axial Propeller Fans 

Fans shall be heavy duty axial propeller type statically balanced. 

The fans shall be fabricated by the cooling tower manufacturer 

11

E V A P C O P R O D U C T S A R E M A N U F A C T U R E D W O R L D W I D E . 

World Headquarters/ 

Research and 

Development Center 

EVAPCO Facilities 

EVAPCO...Taking Quality and Service to a Higher Level! 

World Headquarters 

Research/Development Center 

EVAPCO, Inc. 

P.O. Box 1300 

Westminster, MD 21158 USA 

Phone: (410) 756-2600 

Fax: (410) 756-6450 

E-mail: evapco@evapco.com 

European Sales Offices 

EVAPCO France S.A.R.L. 

5 Rue des Cerisiers 

Z.I.De l’Eglantier 

F-91090 Lisses France 

Phone: (33) 1 6086-0508 

Fax: (33) 1 6086-3990 

EVAPCO Europe GmbH 

Bovert 22 

D-40670 Meerbusch, Germany 

Phone: (49) 2159-912367 

Fax: (49) 2159-912368 

E-mail: sturies@evapco.de 

EVAPCO Facilities 

EVAPCO East 

5151 Allendale Lane 

Taneytown, MD 21787 USA 

Phone: (410) 756-2600 

Fax: (410) 756-6450 

E-mail: evapco@evapco.com 

EVAPCO Midwest 

1723 York Road 

Greenup, IL 62428 USA 

Phone: (217) 923-3431 

Fax: (217) 923-3300 

E-mail: evapco@rr1.net 

EVAPCO West 

1900 West Almond Avenue 

Madera, CA 93637 USA 

Phone: (559) 673-2207 

Fax: (559) 673-2378 

E-mail: evapco@lightspeed.net 

Refrigeration Valves & Systems 

1520 Crosswind Dr. 

Bryan, TX 77808 USA 

Phone: (979) 778-0095 

Fax: (979) 778-0030 

E-mail: rvs@mail.myriad.net 

EVAPCO Iowa 

925 Quality Drive 

Lake View, Iowa 51450 USA 

Regional Office 

Phone: (507) 446-8005 

Fax: (507) 446-8239 

E-mail: evapcomn@mnic.net 

EVAPCO Europe, N.V. 

Heersterveldweg 19 

Industriezone, Tongeren-Oost 

3700 Tongeren, Belgium 

Phone: (32) 12-395029 

Fax: (32) 12-238527 

E-mail: evapco@pi.be 

EVAPCO Europe, S.R.L. 

Via Ciro Menotti 10, 

I-20017 Passirana di Rho 

Milano, Italy 

Phone: (39) 02-939-9041 

Fax: (39) 02-935-00840 

E-mail: evapco@tin.it 

EVAPCO Europe, S.R.L. 

Via Dosso, 2 

Piateda Sondrio, Italy 23020 

Air EVAPCO (Ltd.) 

92 Asma Fami Street, ARD El-Golf 

Heliopolis, Cairo, Egypt 

Phone: (20) 2-290-7483 

Fax: (20) 2-290-0892 

E-mail: manzlawi@egyptonline.com 

EVAPCO S.A. (Pty.) Ltd. 

18 Quality Road 

Isando 1600 

Republic of South Africa 

Phone: (27) 11-392-6630 

Fax: (27) 11-392-6615 

E-mail: evapco@icon.co.za 

Beijing Hezhong-EVAPCO 

Refrigeration Equipment Co., Ltd. 

Yan Qi Industrial Development District 

Huai Rou County Beijing, P.R. China 

Code 101407 

Phone: (86) 10-6166-7238 

Fax: (86) 10-6166-7395 

Shanghai Hezhong- 

EVAPCO Refrigeration Co., Ltd. 

855 Yang Tai Road 

Bao Shan Area, 

Shanghai, P.R. China 

Code 201901 

Phone: 011-86-21-5877-3980 

Fax: 011-86-21-5877-2928 

Aqua-Cool Towers 

34-42 Melbourne St. 

P.O. Box 436 

Riverstone, N.S.W. Australia 2765 

Phone: (61) 29-627-3332 

Fax: (61) 29-627-1715 

Visit EVAPCO’s Website at: 

http://www.evapco.com 

4M/0199/DGD 

Bulletin 380A

REP - Evapco

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