PMWQ Product Catalog - EVAPCO.com

2 

® 

Since its founding in 1976, EVAPCO, Incorporated 

has become an industry leader in the engineering 

and manufacturing of quality heat transfer products 

around the world. EVAPCO’s mission is to provide 

first class service and quality products for the 

following markets: 

� Industrial Refrigeration 

� Commercial HVAC 

� Industrial Process 

� Power 

EVAPCO’s powerful combination of financial strength 

and technical expertise has established the company as 

a recognized manufacturer of market-leading products 

on a worldwide basis. EVAPCO is also recognized for 

the superior technology of their environmentally 

friendly product innovations in sound reduction and 

water management. 

EVAPCO is an employee owned company with a strong 

emphasis on research & development and modern 

manufacturing plants. EVAPCO has earned a reputation 

for technological innovation and superior product 

quality by featuring products that are designed to offer 

these operating advantages: 

� Higher System Efficiency 

� Environmentally Friendly 

� Lower Annual Operating Costs 

� Reliable, Simple Operation and 

Maintenance 

With an ongoing commitment to Research & 

Development programs, EVAPCO provides the most 

advanced products in the industry – Technology for the 

Future, Available Today! 

EVAPCO products are manufactured in 17 locations in 

8 countries around the world and supplied through a 

sales network consisting of over 170 offices. 

©2010 EVAPCO, Inc. 

EVAPCO is Proud to Introduce 

Super Low Sound Technology 

for Forced Draft Axial Fan Closed 

Circuit Coolers. 

Super Low Sound Fan Technology 

• One Piece Molded Heavy Duty FRP Construction. 

• Sound level reduction 10-13 dBA on fan side @ 50’. 

PMWQ/LSWB Sound Comparisons 

Fan 

Sound Pressure Levels 

Opp. 

Motor Fan Opp. Fan 

Model No. Power End Side End Side Top 

LSWB 10-4M12 30 58 66 57 56 63 

PMWQ 10-5H12 15 57 66 57 57 62 

LSWB 10-4L18 50 59 66 59 56 63 

PMWQ 10-4I18 30 59 69 59 58 63 

NOTE: Sound pressure levels in dBA 50' from source. 

• Reduced energy consumption compared to Forced Draft 

Centrifugal Closed Circuit Coolers. 

• Typical sound values equal or lower than Forced Draft 

Centrifugal Closed Circuit Coolers of similar size. 

Optional Pulse~Pure ® 

Water Treatment System 

Optional Platform and Ladder 

• Platform is self-supporting. 

• May be installed on either side of the unit. 

• Can be provided with an optional safety cage. 

• Control bacteria to levels well below traditional chemical water treatment. 

• Control the formation of mineral scale. 

• Save water by operating at higher cycles of concentration. 

• Yield corrosion rates equivalent to chemical water treatment. 

Stainless Steel Strainer 

• Superior resistance to corrosion. 

Optional 

Oversized Access Door 

• Man-sized door for easier unit access. 

• One sealed and gasketed door on 

each end of the unit. 

• Oversized Doors between each internal 

partition.

Tota ly Enclosed Pump Motors 

• Help assure long, trouble-free operation. 

Design and Construction Features 

Evapco’s NEW PMWQ units are the perfect option for installations that need it all – single-sided air inlet, low sound 

AND low horsepower. The new design includes Super Low Sound Fans as standard, allowing the PMWQ to operate 

at an average of 20-30% lower horsepower than similarly sized centrifugal models while also reducing sound levels 

† 

by 5-6 dBa. The PMWQ is designed to be IBC complaint and have certified performance. 

CTI Certified † Efficient Drift Eliminators 

MOTOR AND DRIVE 

WA R R A N T Y 

Individual Fan Drive System 

• Increased flexibility for improved capacity control. 

• Greater reliability through redundancy. 

• Easy motor replacement. 

• Front mounted drives for improved 

maintenance accessibility. 

† Mark owned by the Cooling Technology Institute 

• Advanced design limits maximum drift rate. 

to 0.001% of circulated spray water rate. 

• Corrosion resistant PVC for long life. 

Zero Maintenance PVC Spray 

Distribution Header with 

ZMII ® Nozzles 

• Nozzles are threaded into header at 

proper orientation. 

• Fixed position nozzles require zero 

maintenance. 

• Large orifice nozzles prevent clogging. 

• Threaded end caps for ease of cleaning. 

Optional 

Featuring Thermal-Pak ® XT Construction 

• 304L SST Construction for Superior Corrosion Resistance. 

• 5 Year Extended Coil Warranty – STANDARD!! 

• Patented Thermal-Pak ® Introducing the Premier Closed Circuit Cooler 

Coil in the HVAC industry! The Titan provides: 

XT elliptical tube design with 

elliptical return bends and extra tough construction. 

Easy Field Assembly 

• Ensures easy assembly. 

• Incorporates self-guiding 

channels to guide the coil 

casing section into position 

improving the quality of the 

field seam. 

3 

®

4 

® 

What is IBC? 

International Building Code 

IBC COMPLIANCE 

In its continuing commitment to be the leaders in evaporative cooling equipment design and services, EVAPCO 

PMWQ Closed Circuit Coolers are now Independently Certified to withstand both Seismic and Wind Loads in 

ALL Geographic Locations and Installations in accordance with IBC 2006. 

The International Building Code (IBC) is a comprehensive set of 

regulations addressing both the structural design and the 

installation requirements for building systems – including 

HVAC and industrial refrigeration equipment. The IBC is 

intended to replace BOCA’s The National Building Code, ICBO’s 

Uniform Building Code and SBCCI’s Standard Building Code. 

Compared to previous building codes that considered only the 

building structure and component anchorage, the requirements 

contained within the IBC address anchorage, structural 

integrity, and the operational capability of a component 

following either a seismic or wind load event. Simply stated, 

the IBC code provisions require that evaporative cooling 

equipment, and all other components permanently installed 

on a structure, must be designed to meet the same seismic 

and wind load forces as the building to which they are 

attached. 

How Does IBC 2006 Apply to Closed Circuit 

Coolers? 

Based on the project zip code and site design factors, calculations 

are made to determine the equivalent seismic “g force” and 

wind load (in pounds per square foot – psf) on the unit. The 

closed circuit cooler must be designed to withstand the greater 

of either the seismic or wind load. 

The New PMWQ is offered with a choice of TWO structural 

design packages: 

• Standard Structural Design – For projects with 

� 1.0g seismic or 145 psf wind loads 

• Upgraded Structural Design – Required for projects with 

> 1.0g seismic or 145 psf max wind loads 

More than 80% of the United States has design criteria 

resulting in a seismic design force of 1.0g or below. These 

sites will be provided with the standard PMWQ structural 

design. An upgraded structural design is available for 

installations with design criteria resulting in “g forces” greater 

than 1.0g. The highest “g force” location in North America is 

5.12g. The highest wind load shown on the maps is 170 mph, 

which is approximately equal to 145 psf velocity pressure. 

Therefore, the upgraded structural design package option for 

the New PMWQ is designed for 5.12g and 145 psf making it 

applicable to ALL building locations in North America. 

Seismic Design 

The attached chart from the US Geological Survey Website 

(http://www.usgs.gov/) shows the potential seismic activity in the 

United States. Buildings constructed in the red, orange and 

yellow areas of the map may require the upgraded PMWQ 

construction design based on the site seismic design factors and 

should be reviewed closely. Critical use facilities, such as 

hospitals, are also more likely to require the upgraded design. 

Map courtesy US Geological Survey website 

Highest Hazard 

32+ 

24-32 

16-24 

%g 8-16 

4-8 

2-4 

0-2 

Lowest Hazard 

The project architect or civil engineer is responsible for 

determining the seismic design factors to be used for the 

building design. A mechanical consulting engineer and/or design 

build contractor then applies these factors to a series of charts 

and graphs to determine the appropriate seismic design factors

ased on the location of the installation and ultimately the 

“importance” of the facility. The specific factors necessary for 

seismic design as well as a sample seismic calculation are 

available at www.evapco.com. 

Wind Design 

The IBC 2006 code book includes a map of basic wind speed (3second 

gust) by contour lines. However, local regulations may be 

more stringent than these published speeds. The specific factors 

necessary for wind load as well as a sample wind load calculation 

are available at www.evapco.com. 

Whichever design force - seismic or wind - is more severe for 

the building, governs the design of the building and all 

attached equipment. 

Wind Load Map Courtesy IBC 2006 Text – 

See full-sized map for location specific values 

Design Implementation 

EVAPCO applies the given seismic and wind load information 

provided by the mechanical consulting engineer to determine 

the equipment design necessary to meet IBC requirements. 

This process ensures that the mechanical equipment and its 

components are compliant per the provisions of the IBC as 

given in the plans and specifications for the project. For design 

build projects, EVAPCO is equipped to look up the information 

and submit the resulting loads for approval. 

Independent Certification 

Per the most recent edition of the code, the EVAPCO compliance 

process included an exhaustive analysis by an independent 

approval 

agency. As 

required by the 

International 

Building Code, 

EVAPCO supplies 

a certificate 

of compliance 

as part of 

its submittal 

documents. 

The certificate 

IBC COMPLIANCE 

Certificate of Compliance 

LSTB, LPT Cooling Towers 

PMWQ, LSW(A/B), LRW(B) Closed Circuit Coolers 

PMC-E, LSCB and LRC Evaporative Condensers 

Are certified to meet or exceed the Seismic and Wind Load Provisions 

set forth in the applicable building codes for this project. 

These products have been manufactured following all 

applicable quality assurance programs. 

Applicable Building Codes: 

IBC 2006 

ASCE-7 

NFPA 5000 

Referenced Report: 

VMA-43387 

Approval Agency: 

VMC Seismic Consulting Group 

EVAPCO...Specialists in Heat Transfer Products and Services. FD IBC COC 001 

of compliance demonstrates that the equipment has been independently 

tested and analyzed in accordance with the IBC seismic 

and wind load requirements. Evapco has worked closely 

with the independent approval agency to complete the independent 

equipment testing and analysis. 

If the seismic “g force” and wind “psf” load requirements for 

the project site are known, EVAPCO’s online equipment selection 

software, iES, will allow you to choose the required structural 

design package – either standard construction or upgraded 

construction. 

If the project requirements are unknown, the following calculations 

must be completed. 

For further questions regarding IBC compliance, please contact 

your local EVAPCO Representative or visit www.evapco.com. 

When using the EVAPCO selection software to make a 

selection, these calculations are already incorporated into the 

selection process. Simply enter the required seismic factors 

and the Seismic Design Force and Wind Load will be calculated 

automatically!! 

5 

®

6 

Principle of Operation 

DESIGN FEATURES 

The process fluid is circulated through the coil of the closed 

circuit cooler. Heat from the process fluid is dissipated through 

the coil tubes to the water cascading downward over the tubes. 

Simultaneously air is blown through the unit by the fans and 

travels upward over the coil opposite the water flow. A small 

portion of the water is evaporated which removes the heat. The 

warm moist air is forced to the top of the closed circuit cooler by 

the fan and is discharged to the atmosphere. The remaining water 

falls to the sump at the bottom of the cooler where it is 

recirculated by the pump up through the water distribution system 

and back down over the coils. 

Fluid In 

Fluid Out 

Cool Dry 

Entering Air 

® 

Hot Saturated 

Discharge Air 

Principle of Operation–Coolers 

EVAPCOAT Corrosion Protection System: 

G-235 Hot-Dip Galvanized Steel Construction 

The standard material of construction for evaporative cooling 

equipment for many years has been hot-dip galvanized steel. The 

purpose of galvanizing is to protect the base metal from corrosion, 

and the thickness of the galvanized layer directly affects the 

equipment life. 

EVAPCO has been instrumental in the development of corrosion 

protection technology and was the first manufacturer to use 

G-235 galvanized steel construction. The G-235 designation 

equates to a minimum of 2.35 ounces of zinc per square foot of 

surface area. 

The EVAPCOAT Corrosion Protection System is the heaviest 

galvanized coating available for extended corrosion protection 

eliminating the need for costly, unreliable epoxy paint finishes. 

Stainless Steel Material Options 

The PMWQ is available with an optional 304 or 316 stainless steel 

cold water basin or all stainless steel construction. For more information 

on these stainless steel options, see your local Evapco 

sales representative. 

Cooling Coil 

Evapco Closed Circuit Coolers utilize EVAPCO’s patented Thermal- 

Pak ® coil design which assures greater operating efficiency. The 

elliptical tube design allows for closer tube spacing, resulting in 

greater surface area per plan area than round-tube coil designs. In 

addition, the Thermal-Pak ® design has lower resistance to airflow 

and also permits greater water loading, making the Thermal-Pak ® 

coil the most effective design available. 

The coils are manufactured from high quality steel tubing following 

the most stringent quality control procedures. Each circuit is 

inspected to ensure the material quality and then tested before 

being assembled into a coil. Finally, the assembled coil is pneumatically 

tested at 400 psig under water to ensure it is leak free. 

To protect the coil against corrosion, it is placed in a heavy steel 

frame and then the entire assembly is dipped in molten zinc (hotdip 

galvanized) at a temperature of approximately 800°F. 

Thermal-Pak ® Coil by EVAPCO 

Round Tube Coil by Others 

Note: Closed circuit coolers with galvanized coils should only be 

used on sealed, pressurized systems. Continual aeration of the 

water in an open system can cause corrosion inside the tubes of 

the cooler leading to premature failure. 

U.S. Patent # 5,799,725

Stainless Steel Coil Option 

NOW Evapco offers the optional . 

Constructed with type 304L Stainless Steel, the TITAN COIL is 

manufactured using Evapco’s patented elliptical tube Thermal Pak ® 

design upgraded to Xtra Tough construction featuring: Xtra 

Durability, Xtra Corrosion Resistance, and an Xtra long 5 YEAR 

Coil Warranty as standard. 

U.S. Patent No. 5,799,725 

Maintenance Free ZMII ® Spray Nozzle 

Water Distribution System 

EVAPCO’S Zero Maintenance ZMII ® Spray Nozzle 

remains clog-free while providing even and 

constant water distribution for reliable, scale-free 

evaporative cooling under all operating conditions. 

The heavy duty nylon ZMII ® Spray nozzles have a 

1-5/16” diameter opening and a 1-1/2” splash plate 

clearance. Furthermore, the fixed position ZMII ® 

nozzles are mounted in corrosion-free PVC water 

ZMII 

distribution pipes that have threaded end caps. 

Together, these elements combine to provide unequaled coil coverage 

and scale prevention, and make the industry’s best performing 

non-corrosive, maintenance-free water distribution system. 

® Nozzle 

Efficient Drift Eliminators 

The PMWQ is provided with an efficient drift eliminator system that 

effectively reduces entrained water droplets from the air discharge to 

less than 0.001% of the spray water flow rate. 

The eliminators are constructed of non-corrosive PVC with a multipass 

design for maximum drift reduction. They are assembled in 

modular sections for easy 

removal and access to the 

water distribution system. 

In addition to reducing drift, 

the eliminators also 

function as effective debris 

screens which protect the 

spray system from sunlight 

and debris. 

PMWQ Drift Eliminator 

Thermal-Pak ® Coil 

DESIGN FEATURES 

Individual Fan Drive System 

The new PMWQ fan drive system provides individual motor to fan 

configuration as standard equipment on all models. The dedicated 

fan to motor arrangement ensures less “wear & tear” on the drive 

system versus tandem fan motor drive arrangements resulting in 

less maintenance. 

Fan Drive Accessibility 

The drive components of the PMWQ are easily accessed for routine 

maintenance from the front of the unit. Bearing grease fittings are 

extended to the outside of the unit for ease of lubrication. All drive 

sheaves have been relocated to the front of the fan section and 

motors are positioned on a platform base to allow for easy belt 

tension adjustment. 

Easy Clean Sloped Basin & Man-Sized 

Access Doors 

The PMWQ drain pan is designed 

to improve maintenance access 

and make it easier for operating 

technicians to clean. The bottom 

of the pan is sloped to the unit 

drain to ensure that the basin will 

completely drain and allow 

sediment and debris that may 

collect in the basin to be easily 

flushed from the unit. The design 

helps to prevent buildup of 

sedimentary deposits, biological 

films and standing water. 

Evapco also offers optional 

“man-sized” access doors to 

improve access to this critical 

area of the unit. 

7 

®

8 

30-3/8" 

(772) 

® 

Engineering Data & Dimensions 

PMWQ Models 10-3G12 to 10-7J12 

U 

ROUND 

ACCESS 

DOORS 

3(80) MPT 

DRAIN 

57" 

(1448) 

(2) 4 (100) BFW FLUID IN 

(2) 4 (100) BFW FLUID OUT 

9' 9-3/4" 

(2991) 

2(50) MPT 

MAKE UP 

3(80) FPT 

OVERFLOW 

8' 7-1/4" 

(2623) 

A 

9' 11" 

(3022) 

1 Model Number will end in “-Z” for units with Series Flow piping configuration. Series Flow units will require crossover piping. Model numbers will include "C" for units with Stainless Steel 

coil(s) and "S" for units with an option that negates CTI certification. 

2 Heaviest section is the coil section. 

3 Gallons shown is water in suspension in unit and piping. Allow for additional water in bottom of remote sump to cover pump suction and strainer during operation (12” would normally be 

sufficient). 

4 When a remote sump arrangement is selected, the spray pump, suction strainer and associated piping are omitted; the unit is provided with an oversized outlet to facilitate drainage to the 

remote sump. 

5 Unit dimensions and coil connections may vary slightly from catalog. See factory certified prints for dimensions, quantity of coil connections, and piping configuration. Coil connections are 

4” bevel for weld (BFW). Other connection types such as grooved for mechanical coupling or flanged are also available as options. 

H 

18" 

(457) 

(2) 1/2 FPT VENT 

11' 11-3/4" 

(3652) 

Note: The number of coil connections doubles when the flow rate exceeds 900 gm on 10x12 models. This required option is referred to as the High Flow coil configuration. 

Coil 

PMWQ Heaviest Volume Gallons Conn. Operating Height Upper Coil 

Model Number 1 Shipping Section 2 Operating HP CFM HP GPM (Gallons) Required 3 Weights (lbs.) Fans Spray Pump Remote Sump 

Size Weight (lbs.) H U A 

10-3G12 13,350 8,590 17,430 (2) 5 54,300 5 685 253 500 10" 16,750 13' 7-3/8" 5' 1" 22-1/4" 

10-3H12 13,460 8,590 17,540 (2) 7.5 62,300 5 685 253 500 10" 16,860 13' 7-3/8" 5' 1" 22-1/4" 

10-3I12 13,490 8,590 17,570 (2) 10 68,700 5 685 253 500 10" 16,890 13' 7-3/8" 5' 1" 22-1/4" 

10-3J12 13,750 8,590 17,830 (2) 15 78,900 5 685 253 500 10" 17,150 13' 7-3/8" 5' 1" 22-1/4" 

10-4G12 15,320 10,560 19,480 (2) 5 53,500 5 685 332 500 10" 18,800 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4H12 15,430 10,560 19,590 (2) 7.5 61,400 5 685 332 500 10" 18,910 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4I12 15,460 10,560 19,620 (2) 10 67,600 5 685 332 500 10" 18,940 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4J12 15,720 10,560 19,880 (2) 15 77,800 5 685 332 500 10" 19,200 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-5G12 17,180 12,420 21,420 (2) 5 52,700 5 685 411 500 10" 20,740 15' 3/8" 6' 6" 39-1/4" 

10-5H12 17,290 12,420 21,530 (2) 7.5 60,400 5 685 411 500 10" 20,850 15' 3/8" 6' 6" 39-1/4" 

10-5I12 17,320 12,420 21,560 (2) 10 66,700 5 685 411 500 10" 20,880 15' 3/8" 6' 6" 39-1/4" 

10-5J12 17,580 12,420 21,820 (2) 15 76,600 5 685 411 500 10" 21,140 15' 3/8" 6' 6" 39-1/4" 

10-6G12 19,130 14,370 23,440 (2) 5 52,000 5 685 490 500 10" 22,760 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6H12 19,240 14,370 23,550 (2) 7.5 59,500 5 685 490 500 10" 22,870 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6I12 19,270 14,370 23,580 (2) 10 65,700 5 685 490 500 10" 22,900 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6J12 19,530 14,370 23,840 (2) 15 75,500 5 685 490 500 10" 23,160 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7G12 21,480 16,720 25,870 (2) 5 51,200 5 685 569 500 10" 25,190 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7H12 21,590 16,720 25,980 (2) 7.5 58,600 5 685 569 500 10" 25,300 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7I12 21,620 16,720 26,010 (2) 10 64,700 5 685 569 500 10" 25,330 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7J12 21,880 16,720 26,270 (2) 15 74,400 5 685 569 500 10" 25,590 15' 8-7/8" 7' 2-1/2" 47-3/4" 

4 Dimensions 5

Selections for PMWQ Closed Circuit Coolers are available from Evapco’s iES Equipment Selection Program. 

Please contact your local sales representative for more information on the iES program. 



30-3/8" 

(772) 

U 

ROUND 

ACCESS 

DOORS 

3(80) MPT 

DRAIN 

57" 

(1448) 



9' 9-3/4" 

(2991) 

2(50) MPT 

MAKE UP 

3(80) FPT 

OVERFLOW 

8' 7-1/4" 

(2623) 

A 

9' 11" 

(3022) 

H 

20-5/8" 

(524) 



Coil 




10-3G18 20,320 12,580 26,640 (3) 5 81,700 7.5 1,030 374 620 12" 24,440 13' 7-3/8" 5' 1" 22-1/4" 

10-3H18 20,480 12,580 26,800 (3) 7.5 93,700 7.5 1,030 374 620 12" 24,600 13' 7-3/8" 5' 1" 22-1/4" 

10-3I18 20,530 12,580 26,850 (3) 10 103,300 7.5 1,030 374 620 12" 24,650 13' 7-3/8" 5' 1" 22-1/4" 

10-3J18 20,920 12,580 27,240 (3) 15 118,800 7.5 1,030 374 620 12" 25,040 13' 7-3/8" 5' 1" 22-1/4" 

10-4G18 23,250 15,510 29,690 (3) 5 80,500 7.5 1,030 494 620 12" 27,490 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4H18 23,410 15,510 29,850 (3) 7.5 92,400 7.5 1,030 494 620 12" 27,650 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4I18 23,460 15,510 29,900 (3) 10 101,800 7.5 1,030 494 620 12" 27,700 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4J18 23,850 15,510 30,290 (3) 15 117,000 7.5 1,030 494 620 12" 28,090 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-5G18 26,070 18,330 32,620 (3) 5 79,300 7.5 1,030 613 620 12" 30,420 15' 3/8" 6' 6" 39-1/4" 

10-5H18 26,230 18,330 32,780 (3) 7.5 91,000 7.5 1,030 613 620 12" 30,580 15' 3/8" 6' 6" 39-1/4" 

10-5I18 26,280 18,330 32,830 (3) 10 100,300 7.5 1,030 613 620 12" 30,630 15' 3/8" 6' 6" 39-1/4" 

10-5J18 26,670 18,330 33,220 (3) 15 115,300 7.5 1,030 613 620 12" 31,020 15' 3/8" 6' 6" 39-1/4" 

10-6G18 29,000 21,260 35,670 (3) 5 78,100 7.5 1,030 732 620 12" 33,470 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6H18 29,160 21,260 35,830 (3) 7.5 89,600 7.5 1,030 732 620 12" 33,630 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6I18 29,210 21,260 35,880 (3) 10 98,900 7.5 1,030 732 620 12" 33,680 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6J18 29,600 21,260 36,270 (3) 15 113,600 7.5 1,030 732 620 12" 34,070 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7G18 32,530 24,790 39,320 (3) 5 76,900 7.5 1,030 851 620 12" 37,120 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7H18 32,690 24,790 39,480 (3) 7.5 88,300 7.5 1,030 851 620 12" 37,280 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7I18 32,740 24,790 39,530 (3) 10 97,400 7.5 1,030 851 620 12" 37,330 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7J18 33,130 24,790 39,920 (3) 15 111,900 7.5 1,030 851 620 12" 37,720 15' 8-7/8" 7' 2-1/2" 47-3/4" 

4 Dimensions 5 





sufficient). 


remote sump. 



18' 1/8" 

(5490) 

9 

®

30-3/8" 

(772) 

3(80) MPT 

DRAIN 

® 



10 

U 

57" 

(1448) 



ROUND 

ACCESS 

DOORS 

2(50) MPT 

MAKE UP 

8' 7-1/4" 

(2633) 

9' 9-3/4" 

(2991) 

3(80) FPT 

OVERFLOW 

A 

H 

9' 11" 

(3022) 

18" 

(457) 

(2) 1/2 FPT VENT (2) 1/2 FPT VENT 


Coil 




10-3G24 26,770 10190* 35,300 (4) 5 108,600 (2) 5 1,370 507 930 12" 33,160 13' 7-3/8" 5' 1" 22-1/4" 

10-3H24 26,980 10400* 35,510 (4) 7.5 124,600 (2) 5 1,370 507 930 12" 33,370 13' 7-3/8" 5' 1" 22-1/4" 

10-3I24 27,040 10460* 35,570 (4) 10 137,400 (2) 5 1,370 507 930 12" 33,430 13' 7-3/8" 5' 1" 22-1/4" 

10-3J24 27,570 10990* 36,100 (4) 15 157,800 (2) 5 1,370 507 930 12" 33,960 13' 7-3/8" 5' 1" 22-1/4" 

10-4G24 30,910 10,360 39,590 (4) 5 107,000 (2) 5 1,370 664 930 12" 37,450 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4H24 31,120 10400* 39,800 (4) 7.5 122,800 (2) 5 1,370 664 930 12" 37,660 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4I24 31,180 10460* 39,860 (4) 10 135,200 (2) 5 1,370 664 930 12" 37,720 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4J24 31,710 10990* 40,390 (4) 15 155,600 (2) 5 1,370 664 930 12" 38,250 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-5G24 34,830 12,320 43,670 (4) 5 105,400 (2) 5 1,370 822 930 12" 41,530 15' 3/8" 6' 6" 39-1/4" 

10-5H24 35,040 12,320 43,880 (4) 7.5 120,800 (2) 5 1,370 822 930 12" 41,740 15' 3/8" 6' 6" 39-1/4" 

10-5I24 35,100 12,320 43,940 (4) 10 133,400 (2) 5 1,370 822 930 12" 41,800 15' 3/8" 6' 6" 39-1/4" 

10-5J24 35,630 12,320 44,470 (4) 15 153,200 (2) 5 1,370 822 930 12" 42,330 15' 3/8" 6' 6" 39-1/4" 

10-6G24 38,930 14,370 47,920 (4) 5 104,000 (2) 5 1,370 980 930 12" 45,780 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6H24 39,140 14,370 48,130 (4) 7.5 119,000 (2) 5 1,370 980 930 12" 45,990 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6I24 39,200 14,370 48,190 (4) 10 131,400 (2) 5 1,370 980 930 12" 46,050 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6J24 39,730 14,370 48,720 (4) 15 151,000 (2) 5 1,370 980 930 12" 46,580 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7G24 43,630 16,720 52,780 (4) 5 102,400 (2) 5 1,370 1,138 930 12" 50,640 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7H24 43,840 16,720 52,990 (4) 7.5 117,200 (2) 5 1,370 1,138 930 12" 50,850 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7I24 43,900 16,720 53,050 (4) 10 129,400 (2) 5 1,370 1,138 930 12" 50,910 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7J24 44,430 16,720 53,580 (4) 15 148,800 (2) 5 1,370 1,138 930 12" 51,440 15' 8-7/8" 7' 2-1/2" 47-3/4" 




2 Heaviest section is the coil section except for units designated with a *. Heaviest section is the basin section for units designated with a *. 


sufficient). 


remote sump. 



24' 7/8" 

(7339) 

16-3/8" 

(416)




PMWQ Models 10-3G36 

to 10-7J36 

30-3/8" 

(772) 

3(80) MPT 

DRAIN 

57" 

(1448) 

U (4) 4 (100) BFW FLUID IN 


ROUND 

ACCESS 

DOORS 

9' 9-3/4" 

(2991) 

2(50) MPT 

MAKE UP 

3(80) FPT 

OVERFLOW 

8' 7-1/4" 

(2623) 

A 

9' 11" 

(3022) 

H 

20-5/8" 

(524) 


36' 2" 

(11024) 


Coil 




10-3G36 39,140 14740* 52,110 (6) 5 163,400 (2) 7.5 2,060 748 1,400 14" 48,830 13' 7-3/8" 5' 1" 22-1/4" 

10-3H36 39,450 15050* 52,420 (6) 7.5 187,400 (2) 7.5 2,060 748 1,400 14" 49,140 13' 7-3/8" 5' 1" 22-1/4" 

10-3I36 39,550 15150* 52,520 (6) 10 206,600 (2) 7.5 2,060 748 1,400 14" 49,240 13' 7-3/8" 5' 1" 22-1/4" 

10-3J36 40,330 15930* 53,300 (6) 15 237,600 (2) 7.5 2,060 748 1,400 14" 50,020 13' 7-3/8" 5' 1" 22-1/4" 

10-4G36 45,260 15,260 58,460 (6) 5 161,000 (2) 7.5 2,060 987 1,400 14" 55,190 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4H36 45,570 15,260 58,770 (6) 7.5 184,800 (2) 7.5 2,060 987 1,400 14" 55,500 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4I36 45,670 15,260 58,870 (6) 10 203,600 (2) 7.5 2,060 987 1,400 14" 55,600 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-4J36 46,450 15930* 59,650 (6) 15 234,000 (2) 7.5 2,060 987 1,400 14" 56,380 14' 3-7/8" 5' 9-1/2" 30-3/4" 

10-5G36 51,160 18,210 64,600 (6) 5 158,600 (2) 7.5 2,060 1,226 1,400 14" 61,320 15' 3/8" 6' 6" 39-1/4" 

10-5H36 51,470 18,210 64,910 (6) 7.5 182,000 (2) 7.5 2,060 1,226 1,400 14" 61,630 15' 3/8" 6' 6" 39-1/4" 

10-5I36 51,570 18,210 65,010 (6) 10 200,600 (2) 7.5 2,060 1,226 1,400 14" 61,730 15' 3/8" 6' 6" 39-1/4" 

10-5J36 52,350 18,210 65,790 (6) 15 230,600 (2) 7.5 2,060 1,226 1,400 14" 62,510 15' 3/8" 6' 6" 39-1/4" 

10-6G36 57,260 21,260 70,930 (6) 5 156,200 (2) 7.5 2,060 1,464 1,400 14" 67,650 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6H36 57,570 21,260 71,240 (6) 7.5 179,200 (2) 7.5 2,060 1,464 1,400 14" 67,960 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6I36 57,670 21,260 71,340 (6) 10 197,800 (2) 7.5 2,060 1,464 1,400 14" 68,060 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-6J36 58,450 21,260 72,120 (6) 15 227,200 (2) 7.5 2,060 1,464 1,400 14" 68,840 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7G36 64,320 24,790 78,220 (6) 5 153,800 (2) 7.5 2,060 1,703 1,400 14" 74,950 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7H36 64,630 24,790 78,530 (6) 7.5 176,600 (2) 7.5 2,060 1,703 1,400 14" 75,260 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7I36 64,730 24,790 78,630 (6) 10 194,800 (2) 7.5 2,060 1,703 1,400 14" 75,360 15' 8-7/8" 7' 2-1/2" 47-3/4" 

10-7J36 65,510 24,790 79,410 (6) 15 223,800 (2) 7.5 2,060 1,703 1,400 14" 76,140 15' 8-7/8" 7' 2-1/2" 47-3/4" 






sufficient). 


remote sump. 



23-5/8" 

(600) 

11 

®

36-3/4" 

(933) 

® 



12 

3(80) MPT 

DRAIN 

68-5/8" 

(1743) 

U 

(2)4 (100) BFW FLUID IN 

A 

(2)4 (100) BFW FLUID OUT 

OVERSIZED 

ACCESS 

DOORS 

2(50) MPT 

MAKE UP 

8' 7-11/16" 

(2634) 

11' 10-3/8" 

(3618) 

3(80) FPT 

OVERFLOW 

9' 11" 

(3023) 

H 

18" 

(457) 


11' 11-3/4" 

(3652) 


Coil 




12-3G12 15,440 9,970 20,480 (2) 5 65,000 5 800 312 570 10" 19,450 13' 7-3/8" 5' 1" 22-1/4" 

12-3H12 15,540 9,970 20,580 (2) 7.5 74,400 5 800 312 570 10" 19,550 13' 7-3/8" 5' 1" 22-1/4" 

12-3I12 15,570 9,970 20,610 (2) 10 79,400 5 800 312 570 10" 19,580 13' 7-3/8" 5' 1" 22-1/4" 

12-3J12 15,840 9,970 20,880 (2) 15 91,300 5 800 312 570 10" 19,850 13' 7-3/8" 5' 1" 22-1/4" 

12-4G12 17,830 12,360 22,970 (2) 5 64,000 5 800 409 570 10" 21,940 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4H12 17,930 12,360 23,070 (2) 7.5 73,300 5 800 409 570 10" 22,040 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4I12 17,960 12,360 23,100 (2) 10 78,200 5 800 409 570 10" 22,070 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4J12 18,230 12,360 23,370 (2) 15 89,900 5 800 409 570 10" 22,340 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-5G12 20,100 14,630 25,330 (2) 5 63,300 5 800 506 570 10" 24,300 15' 3/8" 6' 6" 39-1/4" 

12-5H12 20,200 14,630 25,430 (2) 7.5 72,400 5 800 506 570 10" 24,400 15' 3/8" 6' 6" 39-1/4" 

12-5I12 20,230 14,630 25,460 (2) 10 77,100 5 800 506 570 10" 24,430 15' 3/8" 6' 6" 39-1/4" 

12-5J12 20,500 14,630 25,730 (2) 15 88,700 5 800 506 570 10" 24,700 15' 3/8" 6' 6" 39-1/4" 

12-6G12 22,330 16,860 27,660 (2) 5 62,200 5 800 604 570 10" 26,630 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6H12 22,430 16,860 27,760 (2) 7.5 71,200 5 800 604 570 10" 26,730 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6I12 22,460 16,860 27,790 (2) 10 76,000 5 800 604 570 10" 26,760 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6J12 22,730 16,860 28,060 (2) 15 87,200 5 800 604 570 10" 27,030 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7G12 25,090 19,620 30,520 (2) 5 61,200 5 800 701 570 10" 29,490 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7H12 25,190 19,620 30,620 (2) 7.5 70,100 5 800 701 570 10" 29,590 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7I12 25,220 19,620 30,650 (2) 10 74,900 5 800 701 570 10" 29,620 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7J12 25,490 19,620 30,920 (2) 15 85,900 5 800 701 570 10" 29,890 15' 8-7/8" 7' 2-1/2" 47-3/4" 






sufficient). 


remote sump. 


4” bevel for weld (BFW). Other connection types such as grooved for mechanical coupling or flanged are also available as options.





36-3/4" 

(933) 

U 

ROUND 

ACCESS 

DOORS 

3(80) MPT 

DRAIN 

68-5/8" 

(1743) 



11' 10-3/8" 

(3618) 

2(50) MPT 

MAKE UP 

3(80) FPT 

OVERFLOW 

8' 7-11/16" 

(2634) 

A 

9' 11" 

(3023) 

H 

20-5/8" 

(524) 



Coil 




12-3G18 23,490 14,920 30,820 (3) 5 97,200 7.5 1,200 461 740 12" 28,160 13' 7-3/8" 5' 1" 22-1/4" 

12-3H18 23,650 14,920 30,980 (3) 7.5 111,300 7.5 1,200 461 740 12" 28,320 13' 7-3/8" 5' 1" 22-1/4" 

12-3I18 23,700 14,920 31,030 (3) 10 118,700 7.5 1,200 461 740 12" 28,370 13' 7-3/8" 5' 1" 22-1/4" 

12-3J18 24,090 14,920 31,420 (3) 15 136,500 7.5 1,200 461 740 12" 28,760 13' 7-3/8" 5' 1" 22-1/4" 

12-4G18 27,060 18,490 34,540 (3) 5 95,800 7.5 1,200 608 740 12" 31,880 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4H18 27,220 18,490 34,700 (3) 7.5 109,700 7.5 1,200 608 740 12" 32,040 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4I18 27,270 18,490 34,750 (3) 10 117,000 7.5 1,200 608 740 12" 32,090 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4J18 27,660 18,490 35,140 (3) 15 134,400 7.5 1,200 608 740 12" 32,480 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-5G18 30,500 21,930 38,120 (3) 5 94,600 7.5 1,200 755 740 12" 35,460 15' 3/8" 6' 6" 39-1/4" 

12-5H18 30,660 21,930 38,280 (3) 7.5 108,300 7.5 1,200 755 740 12" 35,620 15' 3/8" 6' 6" 39-1/4" 

12-5I18 30,710 21,930 38,330 (3) 10 115,200 7.5 1,200 755 740 12" 35,670 15' 3/8" 6' 6" 39-1/4" 

12-5J18 31,100 21,930 38,720 (3) 15 132,700 7.5 1,200 755 740 12" 36,060 15' 3/8" 6' 6" 39-1/4" 

12-6G18 33,710 25,140 41,480 (3) 5 93,000 7.5 1,200 902 740 12" 38,820 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6H18 33,870 25,140 41,640 (3) 7.5 106,500 7.5 1,200 902 740 12" 38,980 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6I18 33,920 25,140 41,690 (3) 10 113,600 7.5 1,200 902 740 12" 39,030 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6J18 34,310 25,140 42,080 (3) 15 130,500 7.5 1,200 902 740 12" 39,420 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7G18 37,830 29,260 45,740 (3) 5 91,700 7.5 1,200 1,050 740 12" 43,080 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7H18 37,990 29,260 45,900 (3) 7.5 104,900 7.5 1,200 1,050 740 12" 43,240 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7I18 38,040 29,260 45,950 (3) 10 111,900 7.5 1,200 1,050 740 12" 43,290 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7J18 38,430 29,260 46,340 (3) 15 128,500 7.5 1,200 1,050 740 12" 43,680 15' 8-7/8" 7' 2-1/2" 47-3/4" 






sufficient). 


remote sump. 



18' 1/8" 

(5490) 

13 

®

36-3/4" 

(933) 

3(80) MPT 

DRAIN 

® 



14 

U 

68-5/8" 

(1743) 



ROUND 

ACCESS 

3(80) MPT 

DOORS MAKE UP 8' 7-11/16" 

(2634) 

11' 10-3/8" 

(3618) 

3(80) FPT 

OVERFLOW 

A 

9' 11" 

(3022) 

H 

36-3/8" 

(924) 



Coil 




12-3G20 25,580 16,360 33,930 (3) 5 103,100 10 1,400 511 810 14" 30,940 13' 7-3/8" 5' 1" 22-1/4" 

12-3H20 25,740 16,360 34,090 (3) 7.5 118,000 10 1,400 511 810 14" 31,100 13' 7-3/8" 5' 1" 22-1/4" 

12-3I20 25,790 16,360 34,140 (3) 10 125,900 10 1,400 511 810 14" 31,150 13' 7-3/8" 5' 1" 22-1/4" 

12-3J20 26,180 16,360 34,530 (3) 15 144,700 10 1,400 511 810 14" 31,540 13' 7-3/8" 5' 1" 22-1/4" 

12-4G20 29,500 20,280 38,010 (3) 5 101,600 10 1,400 674 810 14" 35,020 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4H20 29,660 20,280 38,170 (3) 7.5 116,300 10 1,400 674 810 14" 35,180 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4I20 29,710 20,280 38,220 (3) 10 124,000 10 1,400 674 810 14" 35,230 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4J20 30,100 20,280 38,610 (3) 15 142,500 10 1,400 674 810 14" 35,620 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-5G20 33,340 24,120 42,010 (3) 5 100,300 10 1,400 838 810 14" 39,020 15' 3/8" 6' 6" 39-1/4" 

12-5H20 33,500 24,120 42,170 (3) 7.5 114,800 10 1,400 838 810 14" 39,180 15' 3/8" 6' 6" 39-1/4" 

12-5I20 33,550 24,120 42,220 (3) 10 122,200 10 1,400 838 810 14" 39,230 15' 3/8" 6' 6" 39-1/4" 

12-5J20 33,940 24,120 42,610 (3) 15 140,600 10 1,400 838 810 14" 39,620 15' 3/8" 6' 6" 39-1/4" 

12-6G20 37,410 28,190 46,240 (3) 5 98,600 10 1,400 1,002 810 14" 43,250 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6H20 37,570 28,190 46,400 (3) 7.5 112,800 10 1,400 1,002 810 14" 43,410 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6I20 37,620 28,190 46,450 (3) 10 120,300 10 1,400 1,002 810 14" 43,460 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6J20 38,010 28,190 46,840 (3) 15 138,300 10 1,400 1,002 810 14" 43,850 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7G20 42,060 32,840 51,050 (3) 5 97,100 10 1,400 1,166 810 14" 48,060 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7H20 42,220 32,840 51,210 (3) 7.5 111,100 10 1,400 1,166 810 14" 48,220 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7I20 42,270 32,840 51,260 (3) 10 118,500 10 1,400 1,166 810 14" 48,270 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7J20 42,660 32,840 51,650 (3) 15 136,200 10 1,400 1,166 810 14" 48,660 15' 8-7/8" 7' 2-1/2" 47-3/4" 






sufficient). 


remote sump. 



20' 1/4" 

(6103)





36-3/4" 

(933) 

U 

3(80) MPT 

DRAIN 

68-5/8" 

(1743) 



ROUND 

ACCESS 

DOORS 

3(80) MPT 

MAKE UP 8' 7-11/16" 

(2634) 

11' 10-3/8" 

(3618) 

3(80) FPT 

OVERFLOW 

A 

9' 11" 

(3022) 

H 

18" 

(457) 



Coil 




12-3G24 30,180 10900* 40,550 (4) 5 130,000 (2) 5 1,600 623 1,080 14" 37,750 13' 7-3/8" 5' 1" 22-1/4" 

12-3H24 30,390 11110* 40,760 (4) 7.5 148,800 (2) 5 1,600 623 1,080 14" 37,960 13' 7-3/8" 5' 1" 22-1/4" 

12-3I24 30,450 11170* 40,820 (4) 10 158,800 (2) 5 1,600 623 1,080 14" 38,020 13' 7-3/8" 5' 1" 22-1/4" 

12-3J24 30,980 11700* 41,350 (4) 15 182,600 (2) 5 1,600 623 1,080 14" 38,550 13' 7-3/8" 5' 1" 22-1/4" 

12-4G24 35,200 12,150 45,770 (4) 5 128,000 (2) 5 1,600 818 1,080 14" 42,970 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4H24 35,410 12,150 45,980 (4) 7.5 146,600 (2) 5 1,600 818 1,080 14" 43,180 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4I24 35,470 12,150 46,040 (4) 10 156,400 (2) 5 1,600 818 1,080 14" 43,240 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4J24 36,000 12,150 46,570 (4) 15 179,800 (2) 5 1,600 818 1,080 14" 43,770 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-5G24 39,960 14,530 50,720 (4) 5 126,600 (2) 5 1,600 1,013 1,080 14" 47,920 15' 3/8" 6' 6" 39-1/4" 

12-5H24 40,170 14,530 50,930 (4) 7.5 144,800 (2) 5 1,600 1,013 1,080 14" 48,130 15' 3/8" 6' 6" 39-1/4" 

12-5I24 40,230 14,530 50,990 (4) 10 154,200 (2) 5 1,600 1,013 1,080 14" 48,190 15' 3/8" 6' 6" 39-1/4" 

12-5J24 40,760 14,530 51,520 (4) 15 177,400 (2) 5 1,600 1,013 1,080 14" 48,720 15' 3/8" 6' 6" 39-1/4" 

12-6G24 44,620 16,860 55,570 (4) 5 124,400 (2) 5 1,600 1,208 1,080 14" 52,770 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6H24 44,830 16,860 55,780 (4) 7.5 142,400 (2) 5 1,600 1,208 1,080 14" 52,980 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6I24 44,890 16,860 55,840 (4) 10 152,000 (2) 5 1,600 1,208 1,080 14" 53,040 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6J24 45,420 16,860 56,370 (4) 15 174,400 (2) 5 1,600 1,208 1,080 14" 53,570 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7G24 50,140 19,620 61,280 (4) 5 122,400 (2) 5 1,600 1,403 1,080 14" 58,480 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7H24 50,350 19,620 61,490 (4) 7.5 140,200 (2) 5 1,600 1,403 1,080 14" 58,690 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7I24 50,410 19,620 61,550 (4) 10 149,800 (2) 5 1,600 1,403 1,080 14" 58,750 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7J24 50,940 19,620 62,080 (4) 15 171,800 (2) 5 1,600 1,403 1,080 14" 59,280 15' 8-7/8" 7' 2-1/2" 47-3/4" 






sufficient). 


remote sump. 



24' 7/8" 

(7339) 

16-3/8" 

(416) 

15 

®

2(50) MPT 

MAKE UP 

3(80) MPT 

DRAIN 

® 



to 12-7J36 

16 

36-3/4" 

(933) 

U 

ROUND 

ACCESS 

DOORS 

68-5/8" 

(1743) 



11' 10-3/8" 

(3618) 

A 

9' 11" 

(3023) 

8' 7-11/16" 

(2634) 

(2) 3(80) FPT 

OVERFLOW 

H 

20-5/8" 

(524) 






sufficient). 


remote sump. 



36' 2" 

(11024) 


Coil 




12-3G36 44,910 15890* 60,320 (6) 5 194,400 (2) 7.5 2,400 922 1,460 16" 54,670 13' 7-3/8" 5' 1" 22-1/4" 

12-3H36 45,230 16210* 60,640 (6) 7.5 222,600 (2) 7.5 2,400 922 1,460 16" 54,990 13' 7-3/8" 5' 1" 22-1/4" 

12-3I36 45,320 16300* 60,730 (6) 10 237,400 (2) 7.5 2,400 922 1,460 16" 55,080 13' 7-3/8" 5' 1" 22-1/4" 

12-3J36 46,110 17090* 61,520 (6) 15 273,000 (2) 7.5 2,400 922 1,460 16" 55,870 13' 7-3/8" 5' 1" 22-1/4" 

12-4G36 52,310 18,210 68,010 (6) 5 191,600 (2) 7.5 2,400 1,216 1,460 16" 62,360 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4H36 52,630 18,210 68,330 (6) 7.5 219,400 (2) 7.5 2,400 1,216 1,460 16" 62,680 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4I36 52,720 18,210 68,420 (6) 10 234,000 (2) 7.5 2,400 1,216 1,460 16" 62,770 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4J36 53,510 18,210 69,210 (6) 15 268,800 (2) 7.5 2,400 1,216 1,460 16" 63,560 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-5G36 59,470 21,790 75,460 (6) 5 189,200 (2) 7.5 2,400 1,510 1,460 16" 69,800 15' 3/8" 6' 6" 39-1/4" 

12-5H36 59,790 21,790 75,780 (6) 7.5 216,600 (2) 7.5 2,400 1,510 1,460 16" 70,120 15' 3/8" 6' 6" 39-1/4" 

12-5I36 59,880 21,790 75,870 (6) 10 230,400 (2) 7.5 2,400 1,510 1,460 16" 70,210 15' 3/8" 6' 6" 39-1/4" 

12-5J36 60,670 21,790 76,660 (6) 15 265,400 (2) 7.5 2,400 1,510 1,460 16" 71,000 15' 3/8" 6' 6" 39-1/4" 

12-6G36 66,170 25,140 82,450 (6) 5 186,000 (2) 7.5 2,400 1,805 1,460 16" 76,790 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6H36 66,490 25,140 82,770 (6) 7.5 213,000 (2) 7.5 2,400 1,805 1,460 16" 77,110 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6I36 66,580 25,140 82,860 (6) 10 227,200 (2) 7.5 2,400 1,805 1,460 16" 77,200 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6J36 67,370 25,140 83,650 (6) 15 261,000 (2) 7.5 2,400 1,805 1,460 16" 77,990 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7G36 74,410 29,260 90,980 (6) 5 183,400 (2) 7.5 2,400 2,099 1,460 16" 85,320 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7H36 74,730 29,260 91,300 (6) 7.5 209,800 (2) 7.5 2,400 2,099 1,460 16" 85,640 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7I36 74,820 29,260 91,390 (6) 10 223,800 (2) 7.5 2,400 2,099 1,460 16" 85,730 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7J36 75,610 29,260 92,180 (6) 15 257,000 (2) 7.5 2,400 2,099 1,460 16" 86,520 15' 8-7/8" 7' 2-1/2" 47-3/4" 


23-5/8" 

(600)





to 12-7J40 

36-3/4" 

(933) 

U 

3(80) MPT 

MAKE UP 

ROUND 

ACCESS 

DOORS 

(2) 3(80) 

MPT DRAIN 

68-5/8" 

(1743) 



11' 10-3/8" 

(3618) 

A 

9' 11" 

(3023) 

8' 7-11/16" 

(2634) 

(2) 3(80) FPT 

OVERFLOW 

H 

36-3/8 

(924) 


40' 2" 

(12243) 


Coil 




12-3G40 49,450 17190* 66,410 (6) 5 206,200 (2) 10 2,800 1,021 1,630 16" 60,180 13' 7-3/8" 5' 1" 22-1/4" 

12-3H40 49,760 17500* 66,720 (6) 7.5 236,000 (2) 10 2,800 1,021 1,630 16" 60,490 13' 7-3/8" 5' 1" 22-1/4" 

12-3I40 49,860 17600* 66,820 (6) 10 251,800 (2) 10 2,800 1,021 1,630 16" 60,590 13' 7-3/8" 5' 1" 22-1/4" 

12-3J40 50,650 18390* 67,610 (6) 15 289,400 (2) 10 2,800 1,021 1,630 16" 61,380 13' 7-3/8" 5' 1" 22-1/4" 

12-4G40 57,590 20,200 74,880 (6) 5 203,200 (2) 10 2,800 1,349 1,630 16" 68,650 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4H40 57,900 20,200 75,190 (6) 7.5 232,600 (2) 10 2,800 1,349 1,630 16" 68,960 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4I40 58,000 20,200 75,290 (6) 10 248,000 (2) 10 2,800 1,349 1,630 16" 69,060 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-4J40 58,790 20,200 76,080 (6) 15 285,000 (2) 10 2,800 1,349 1,630 16" 69,850 14' 3-7/8" 5' 9-1/2" 30-3/4" 

12-5G40 65,550 24,180 83,160 (6) 5 200,600 (2) 10 2,800 1,676 1,630 16" 76,930 15' 3/8" 6' 6" 39-1/4" 

12-5H40 65,860 24,180 83,470 (6) 7.5 229,600 (2) 10 2,800 1,676 1,630 16" 77,240 15' 3/8" 6' 6" 39-1/4" 

12-5I40 65,960 24,180 83,570 (6) 10 244,400 (2) 10 2,800 1,676 1,630 16" 77,340 15' 3/8" 6' 6" 39-1/4" 

12-5J40 66,750 24,180 84,360 (6) 15 281,200 (2) 10 2,800 1,676 1,630 16" 78,130 15' 3/8" 6' 6" 39-1/4" 

12-6G40 73,970 28,390 91,900 (6) 5 197,200 (2) 10 2,800 2,004 1,630 16" 85,670 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6H40 74,280 28,390 92,210 (6) 7.5 225,600 (2) 10 2,800 2,004 1,630 16" 85,980 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6I40 74,380 28,390 92,310 (6) 10 240,600 (2) 10 2,800 2,004 1,630 16" 86,080 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-6J40 75,170 28,390 93,100 (6) 15 276,600 (2) 10 2,800 2,004 1,630 16" 86,870 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7G40 83,270 33,040 101,520 (6) 5 194,200 (2) 10 2,800 2,331 1,630 16" 95,290 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7H40 83,580 33,040 101,830 (6) 7.5 222,200 (2) 10 2,800 2,331 1,630 16" 95,600 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7I40 83,680 33,040 101,930 (6) 10 237,000 (2) 10 2,800 2,331 1,630 16" 95,700 15' 8-7/8" 7' 2-1/2" 47-3/4" 

12-7J40 84,470 33,040 102,720 (6) 15 272,400 (2) 10 2,800 2,331 1,630 16" 96,490 15' 8-7/8" 7' 2-1/2" 47-3/4" 






sufficient). 


remote sump. 



32-3/4 

(832) 

17 

®

18 

® 

OPTIONAL EQUIPMENT 

Pulse~Pure ® 

The PMWQ is available with EVAPCO’s optional Pulse~Pure ® 

non-chemical water treatment system. The Pulse~Pure ® Water 

Treatment System utilizes pulsed-power technology to provide 

CHEMICAL FREE Water Treatment and is an environmentally responsible 

alternative for treating water in evaporative cooled equipment. 

It does not release harmful by-products to the environment 

and eliminates costly chemicals completely from cooler drift and 

blowdown. The Pulse~Pure ® system delivers short, high-frequency 

bursts of low energy electromagnetic fields to the recirculating 

water in the PMWQ and will: 

• Control Bacteria to Levels Well Below Most Chemical 

Water Treatment Programs. 

• Control the Formation of Mineral Scale on 

Heat-Exchange Surfaces. 

• Save Water by Operating at Higher Cycles of 

Concentration. 

• Yield Corrosion Rates Equivalent to Chemical 

Water Treatment. 

More benefits of offering EVAPCO’s Pulse~Pure ® Water 

Treatment System on the new PMWQ are: 

• Optional Pulse~Pure ® Factory Mounting - Factory 

Installation of the Pulse~Pure ® System Guarantees 

Your Water Treatment is Installed to Factory 

Specifications. 

• Integral Cutting Edge Conductivity Control and Blowdown 

Packages that are contained in a single feeder panel: 

Conductivity Control Package – Measures Conductivity 

Utilizing a Non-Fouling Torodial Probe and Features: 

• One power connection of 120 volt or 460 volt is all that 

is required. 

• USB port for downloadable 60 day audit trail of system 

operation. 

• Self draining conductivity loop. 

Motorized Blowdown Valve – Standard for the most reliable 

operation in bleed control. Three-way valve operation provides 

good bleed flow without a standing column of water. 

Water Treatment System 

Because ongoing water treatment service is an absolute 

requirement for any evaporative cooled system, each purchase 

of a Pulse~Pure ® Water Treatment System includes, as 

standard, a 1 year water treatment service and monitoring 

contract provided by your EVAPCO Representative 

EVAPCO’s Pulse~Pure ® system 

offers PMWQ owners a single-source 

of responsibility for equipment, 

water treatment and service.

Extended Surface Coil 

Closed Circuit Coolers can be provided with spiral fins on the 

heat exchanger coil to increase the dry performance of the unit. 

Dry performance is accomplished by rejecting heat to the 

atmosphere without the use of the spray pump and the evaporation 

process. Dry operation can be 

practical in cold climates and/or 

when reduced winter loads exist. 

The quantity of finned rows can be 

varied to optimize dry performance. 

See your local sales representative 

for more information. 

Electric Water Level Control 

Closed Circuit Coolers may be 

ordered with an electric water 

level control in lieu of the standard 

mechanical float and 

make-up assembly. This package 

provides accurate control 

of water levels and does not 

require field adjustment. 

Screened Bottom Panels 

Protective inlet screens are provided on the end of the unit’s 

air intake. Screens are not provided below the fan section 

since most units are mounted on the roof or at ground level. 

It is recommended that bottom screens be added to the unit 

when it will be elevated. These screens can be provided by 

the factory at an additional cost or added by the installing 

contractor. 

STEEL SUPPORT 

Steel Support 

The recommended support for EVAPCO Closed Circuit Coolers is 

structural “I” beams located under the outer flanges and running 

the entire length of the unit. Mounting holes 3/4” in diameter are 

located in the bottom chanels of the pan section to provide for 

bolting to the structural steel. (Refer to certified drawings from the 

factory for bolt hole locations.) 

Beams should be level to within 1/360 of unit length, not to exceed 

1/2” before setting the unit in place. Do not level the unit by 

shimming between it and the “I” beams as this will not provide 

proper longitudinal support. 

A 

10' to 12' WIDE MODELS 

B 

10' to 12' WIDE 

MODELS 

Plan View End Elevation 

OPTIONAL EQUIPMENT 

Self Supporting Service Platform 

PMWQ Closed Circuit 

Coolers are available with 

self-supporting service platforms 

that include access 

ladders which are designed 

for easy field installation. 

This option offers significant 

savings in comparison to 

field constructed, externally 

supported catwalks. The 

EVAPCO service platform option may be installed on either side, or 

the end opposite the connections. 

Capacity Control 

All PMWQ models come standard with premium efficient, inverter 

capable fan motors that can be used with variable frequency drive 

(VFD) systems for precise capacity control. VFD systems can control 

the speed of a fan motor by modulating the voltage and frequency of 

the motor input electrical signal. When connected to a building 

automation system a VFD can receive signals varying fan speeds to 

meet demand loads. This popular method of capacity control can 

yield significant energy savings. 

Evapco offers two-speed fan motors as an option for alternative 

capacity control. In periods of lightened loads or reduced wetbulb 

temperatures the fans can operate at low speed providing about 60% 

of full speed capacity yet consuming only about 15% of full speed 

power. In addition to the energy savings the sound levels of the unit 

can be greatly reduced by operating at low speed. These motors do 

not require the use of VFD systems however they can only operate at 

two speeds: full or low. 

PMWQ Steel Dimensions 

Unit Footprint A B 

10' x 12' 11' 11-3/4" 9' 9-3/4" 

10' x 18' 18' 1/8" 9' 9-3/4" 

10' x 24' 24' 7/8" 9' 9-3/4" 

10' x 36' 36' 2" 9' 9-3/4" 

12' x 12' 11' 11-3/4" 11' 10-3/8" 

12' x 18' 18' 1/8" 11' 10-3/8" 

12' x 20' 20' 1/4" 11' 10-3/8" 

12' x 24' 24' 7/8" 11' 10-3/8" 

12' x 36' 36' 2" 11' 10-3/8" 

12' x 40' 40' 2" 11' 10-3/8" 

19 

®

20 

Freeze Protection 

® 

FREEZE PROTECTION AND HEAT LOSS 

If the units are installed in a cold climate and operated yearround, 

freeze protection must be provided for the heat exchanger 

coil in the unit as well as for the recirculating water system. 

Recirculating Water System Freeze 

Protection Options 

Remote Sump Configuration 

The surest way to protect the recirculating water system from 

freezing is with a remote sump. The remote sump should be 

located inside the building and below the unit. When a remote 

sump arrangement is selected, the spray pump is provided by 

others and installed at the remote sump. All water in the closed 

circuit cooler basin should drain to the remote sump when the 

spray pump cycles off. 

Steam or Hot Water Coils 

Pan coils are available as an alternative to using electric basin 

heaters or a remote sump. Constructed of galvanized pipe and 

installed in the closed circuit cooler basin, they are supplied 

without controls and are ready for piping to an external steam 

or hot water source. Pan water heater controls should be 

interlocked with the water circulating pump to prevent their 

operation when the pump is energized. 

Basin Heater Package 

If a remote sump configuration is not practical, electric basin 

heater packages are available to keep the pan water from 

freezing when the unit cycles off. Water lines to and from the 

unit, spray pump and related piping should be heat traced and 

insulated up to the overflow level to protect from freezing. 

The unit should not be operated dry 

(fans on, pump off) unless the 

basin is completely drained and the 

unit has been designed for dry 

operation. Consult the factory when 

dry operation is a requirement. 

PMWQ Basin Heater Sizing 

Unit Footprint kW (0°F) kW (-20°F) kW (-40°F) 

10' x 12' 8 12 16 

10' x 18' (2) 6 (2) 9 (2) 12 

10' x 24' (2) 8 (2) 12 (2) 15 

10' x 36' (2) 12 (4) 9 (4) 12 

12' x 12' 10 15 20 

12' x 18' (2) 7 (2) 12 (2) 15 

12' x 20' (2) 8 (2) 12 (2) 15 

12' x 24' (2) 9 (2) 15 (2) 18 

12' x 36' (2) 15 (4) 10 (4) 15 

12' x 40' (2) 15 (4) 12 (4) 15 

Heat Exchanger Coil Freeze Protection Options 

The simplest and most foolproof method of protecting the heat 

exchanger coil from freeze-up is to use a glycol solution. If this is 

not possible, an auxiliary heat load must be maintained on the 

coil at all times so that the water temperature does not drop 

below 50°F when the cooler is shut down and, a minimum 

recommended flow rate per unit as shown in the table below 

must be maintained. Refer to Heat Loss Data Table on page 21 

for heat loss data. 

PMWQ Minimim Flows for Freeze Protection 

Minimum Flow for Freeze 

Unit Footprint Standard Unit (gpm) Series Flow Unit (gpm) 

10' x 12' 207 103 

10' x 18' 207 103 

10' x 24' 414 206 

10' x 36' 414 206 

12' x 12' 255 128 

12' x 18' 255 128 

12' x 20' 255 128 

12' x 24' 510 255 

12' x 36' 510 255 

12' x 40' 510 255 

If an anti-freeze solution is not used, the coil must be drained 

immediately whenever the pump is shut down or flow stops. 

Care must be taken to ensure that the piping is sized to allow the 

water to flow quickly from the coil. This method of freeze control 

should only be used in an emergency situation. Coils should not 

be drained for an extended period of time. Leaving the coil 

drained and open to the atmosphere can cause corrosion 

inside the tubes which may lead to premature coil failure. 

The amount of glycol required for a system will depend upon the 

total volume of water in the closed loop and the winter ambient 

conditions for the installation. The Engineering Data Tables 

presented on pages 8-17 provide the water volume contained 

inside the cooler coils to assist in this calculation.

Discharge Hoods with Positive Closure Dampers 

When a closed circuit cooler is used in a water-to-air heat pump 

system or in certain process cooling applications, a method of 

reducing the heat loss during idle periods of wintertime operation 

may be required. For these cases, an optional discharge hood 

with positive closure dampers and damper actuator is available. 

The discharge hood with dampers is designed to minimize 

the heat loss from convective airflow through an idle cooler. 

Further reductions in heat loss may be obtained with the 

addition of insulation to the hood and casing, minimizing 

conductive heat losses. Insulation may be factory-installed 

on the hood and casing or field-installed by an insulation 

contractor. 

The discharge hood and dampers are constructed of hot-dip 

galvanized steel. Hoods are equipped with access panels to 

facilitate maintenance on the eliminators and water distribution 

system. The dampers, damper actuator and linkage are all factory-assembled. 

Actuator controls and wiring are field-supplied 

by others. Damper actuators require 120 volt power supply. 

The system control sequence should provide for dampers to be 

fully open before the fans are running and closed when the 

fans are off; the damper actuator must be interlocked with the 

temperature control system for this purpose. 

Heat loss data is provided for standard units without hoods, with 

hoods and with hoods and insulation. Table ratings are based on 

50°F water in the coil, -10°F ambient and 45 MPH winds (fan and 

pump off). 

L 

ACCESS 

DOOR 

H 

Straight-Sided Discharge Hood 

FREEZE PROTECTION AND HEAT LOSS 

W 

LIFTING DEVICES 

PMWQ Straight-Sided Discharge Hood Dimensions 

AIR 

INTAKE 

SIDE 

Unit Number L (in.) Weight per 

Footprint of Hoods H (in.) Per Hood W (in.) Hoods (lbs.) 

10' x 12' 1 29-3/4" 143-3/4" 114-3/8" 1,600 

10' x 18' 1 29-3/4" 216-1/4" 114-3/8" 2,270 

10' x 24' 2 29-3/4" 143-3/4" 114-3/8" 1,600 

10' x 36' 2 29-3/4" 216-1/4" 114-3/8" 2,270 

12' x 12' 1 29-3/4" 143-3/4" 138-3/4" 1,890 

12' x 18' 1 29-3/4" 216-1/4" 138-3/4" 2,780 

12' x 20' 1 29-3/4" 240-1/4" 138-3/4" 3,080 

12' x 24' 2 29-3/4" 143-3/4" 138-3/4" 1,890 

12' x 36' 2 29-3/4" 216-1/4" 138-3/4" 2,780 

12' x 40' 2 29-3/4" 240-1/4" 138-3/4" 3,080 

PMWQ Heat Loss Data 

PMWQ Standard Unit Unit with Hood With Hood & 

Model (MBH) (MBH) Insulation (MBH) 

10-3x12 338 125 80 

10-4x12 409 135 86 

10-5x12 460 144 92 

10-6x12 489 154 98 

10-7x12 569 180 115 

10-3x18 512 164 105 

10-4x18 620 176 113 

10-5x18 696 189 121 

10-6x18 741 201 129 

10-7x18 864 234 150 

10-3x24 676 250 160 

10-4x24 818 270 172 

10-5x24 920 288 184 

10-6x24 978 308 196 

10-7x24 1,138 360 230 

10-3x36 1,024 328 210 

10-4x36 1,240 352 226 

10-5x36 1,392 378 242 

10-6x36 1,482 402 258 

10-7x36 1,728 468 300 

12-3x12 354 207 133 

12-4x12 427 214 138 

12-5x12 480 223 144 

12-6x12 515 232 149 

12-7x12 601 269 173 

12-3x18 534 251 161 

12-4x18 642 263 169 

12-5x18 726 270 174 

12-6x18 775 282 179 

12-7x18 904 330 211 

12-3x20 733 332 213 

12-4x20 882 346 222 

12-5x20 997 358 229 

12-6x20 1,065 372 237 

12-7x20 1,243 435 279 

12-3x24 708 414 266 

12-4x24 854 428 276 

12-5x24 960 446 288 

12-6x24 1,030 464 298 

12-7x24 1,202 538 346 

12-3x36 1,068 502 322 

12-4x36 1,284 526 338 

12-5x36 1,452 540 348 

12-6x36 1,550 564 358 

12-7x36 1,808 660 422 

21 

®

22 

Design 

® 

PRODUCT APPLICATIONS 

EVAPCO Closed Circuit Coolers are of heavy-duty construction 

and designed for long trouble-free operation. Proper equipment 

selection, installation and maintenance is, however, necessary to 

ensure full unit performance. Some of the major considerations 

in the application of a cooler are presented below. For additional 

information, contact the factory. 

Air Circulation 

It is important that proper air circulation be provided. The best 

location is on an unobstructed roof top or on ground level away 

from walls and other barriers. Those closed circuit coolers located 

in wells, enclosures or adjacent to high walls must be properly 

located to avoid the problems associated with recirculation. 

Recirculation raises the wet bulb temperature of the entering air 

causing the water temperature to rise above the design. For 

these cases, the discharge of the unit should be located at a 

height even with the adjacent wall, thereby reducing the chance 

of recirculation. For additional information, see the EVAPCO 

Equipment Layout Manual. 

Good engineering practice dictates that the closed circuit cooler 

discharge air not be directed or located close to or in the vicinity 

of building air intakes. 

Piping 

Cooler piping should be designed and installed in accordance 

with generally accepted engineering practices. The piping layout 

should be symmetrical on multiple unit systems, and sized for a 

reasonably low water velocity and pressure drop. 

The standard closed circuit cooler is recommended only on a 

closed, pressurized system. The piping system should include an 

expansion tank to allow for fluid expansion and purging air from 

the system. 

Note: Closed Circuit Coolers with a galvanized coil should 

never be used on an open type system. An open type system 

with a cooler may result in premature coil failure. If an open 

system must be used, provide the optional stainless steel coil. 

The piping system should be designed to permit complete 

drainage of the heat exchanger coil. This will require a vacuum 

breaker or air vent to be installed at the high point and a drain 

valve installed at the low point of the piping system. Both must 

be adequately sized. 

All piping should be securely anchored by properly designed 

hangers and supports. No external loads should be placed upon 

the cooler connections, nor should any of the pipe supports be 

anchored to the cooler framework. 

Recirculating Water Quality 

Proper water treatment is an essential part of the maintenance 

required for evaporative cooling equipment. A well designed and 

consistently implemented water treatment program will help to 

ensure efficient system operation while maximizing the 

equipment’s service life. A qualified water treatment company 

should design a site specific water treatment protocol based on 

equipment (including all metallurgies in the cooling system), 

location, makeup water quality, and usage. 

Bleed Off 

Evaporative cooling equipment requires a bleed or blowdown 

line, located on the discharge side of the recirculating pump, to 

remove concentrated (cycled up) water from the system. Evapco 

recommends an automated conductivity controller to maximize 

the water efficiency of your system. Based on recommendations 

from your water treatment company, the conductivity controller 

should open and close a motorized ball or solenoid valve to 

maintain the conductivity of the recirculating water. If a manual 

valve is used to control the rate of bleed it should be set to 

maintain the conductivity of the recirculating water during 

periods of peak load at the maximum level recommended by 

your water treatment company. 

Water Treatment 

The water treatment program prescribed for the given conditions 

must be compatible with the unit’s materials of construction, 

including any galvanized components. The initial commissioning 

and passivation period is a critical time for maximizing the service 

life of galvanized equipment. Evapco recommends that the site 

specific water treatment protocol includes a passivation 

procedure which details water chemistry, any necessary chemical 

addition, and visual inspections during the first six (6) to twelve 

(12) weeks of operation. During this passivation period, 

recirculating water pH should be maintained above 7.0 and below 

8.0 at all times. Batch feeding of chemicals is not recommended. 

Control of Biological Contaminants 

Evaporative cooling equipment should be inspected regularly to 

ensure good microbiological control. Inspections should include 

both monitoring of microbial populations via culturing 

techniques and visual inspections for evidence of biofouling. 

Poor microbiological control can result in loss of heat transfer 

efficiency, increase corrosion potential, and increase the risk of 

pathogens such as those that cause Legionnaires’ disease. Your 

site specific water treatment protocol should include procedures 

for routine operation, startup after a shut-down period, and 

system lay-up, if applicable. If excessive microbiological 

contamination is detected, a more aggressive mechanical 

cleaning and/or water treatment program should be undertaken.

Part 1 – General 

1.1 RELATED DOCUMENTS 

A. Drawings and general provisions of the Contract, including 

General and Supplementary Conditions and Division 1 

Specification Sections, apply to this section. 

1.2 SUMMARY: 

A. This Section includes factory assembled and tested, closed-circuit 

forced-draft cooling tower (also known as a closed circuit cooler). 

1.3 SUBMITTALS 

A. General: Submit the following: 

1. Certified drawings of the closed circuit cooler, sound data, 

recommended steel support indicating weight loadings, 

wiring diagrams, installation instructions, operation and 

maintenance instructions, and thermal performance 

guarantee by the manufacturer. 

1.4 QUALITY ASSURANCE 

A. Verification of Performance: 

1. Test and certify closed circuit cooler thermal performance 

according to CTI Standard 201. 

2. Test and certify closed circuit cooler sound performance 

according to CTI ATC-128. 

B. Meet or Exceed energy efficiency per ASHRAE 90.1. 

1.5 WARRANTY 

A. Motor/Drive System: Five (5) year comprehensive warranty 

against materials and workmanship including motor, fan, 

bearings, mechanical support, sheaves, bushings and belt. 

B. Unit: One (1) year from start-up, not to exceed eighteen (18) 

months from shipment on the unit. 

Part 2 – Products 

2.1 MANUFACTURERS 

A. Manufactures: Subject to compliance with requirements, provide 

closed circuit coolers manufactured by one of the following: 

1. EVAPCO, Inc. 

2. Approved Substitute 

2.2 MATERIALS 

A. Galvanized Sheet Steel complying with ASTM A 653/A 653M and 

having G-235 designation. 

B. Optional Type 304 and/or 316 Stainless Steel as specified. 

2.3 FORCED-DRAFT, CLOSED CIRCUIT COOLER 

A. Description: Factory assembled and tested, forced draft closed 

circuit cooler complete with heat transfer coil, fan, accessories, 

and rigging supports. 

B. Closed Circuit Cooler Characteristics and Capacities: Refer to the 

Closed Circuit Cooler schedule. 

C. Fan(s): 

1. Type and Material: Propeller fans of FRP construction. The 

fans shall be factory installed, and statically and dynamically 

balanced for vibration free operation. 

2. Fan Housing: The complete drive system, including the 

electric motor, belts, bearings, fan, and drives shall be 

completely enclosed in a protective housing which covers the 

drive system. 

3. Maximum sound pressure level of ____dB(A) measured at 5 

feet above the fan discharge during full speed operation in 

accordance with CTI Standard ATC-128. 

D. Water Distribution System: Non-corrosive materials. 

1. Evenly distribute water over heat transfer coil with 

pressurized spray tree. 

a. Pipes: Schedule 40 PVC, Non-corrosive Materials 

b. Nozzles: Non-clogging, nylon, threaded into branch 

piping. 

2. Maximum pressure at inlet shall be ____ psig. 

SPECIFICATIONS 

E. IBC Compliance: The unit structure shall be designed, analyzed, 

and constructed in accordance with the latest edition of the 

International Building Code (IBC) Regulations for seismic loads 

up to ____ g and wind loads up to ____ psf. 

F. Collection Basin Material: Heavy Gauge G-235 Galvanized Steel or 

Type 304 Stainless Steel (Optional) for long life and durability: 

1. Removable Type 304 Stainless Steel strainer with openings 

smaller than nozzle orifices. 

2. Joints: Bolted and sealed watertight. 

3. Overflow, Makeup and Drain connections: G-235 Galvanized 

Steel (MPT and FPT). 

G. Casing: Heavy Gauge G-235 Galvanized Steel or Type 304 

Stainless Steel (Optional): 

1. Casing panels shall totally encase all sides of the heat 

transfer surface to protect it from direct exposure to 

environmental elements. All galvanized steel panel edges 

shall be coated with a 95% pure zinc compound during 

fabrication. 

2. Fasteners: Corrosion resistance equal to or better than 

materials being fastened. 

3. Joints: Sealed watertight. 

4. Welded Connections: Continuous and watertight 

H. Heat Transfer Coil: Heavy Gauge G-235 Galvanized Steel encased 

in a steel framework, assembly hot-dip galvanized after 

construction. Type 304 Stainless Steel Optional. Coil assembly 

completely enclosed and protected from sunlight exposure, 

environmental elements and debris. Tubes sloped for free 

drainage of the coil and designed for low pressure drop. Coil 

assembly pneumatically tested at 400 psig under water. Coil 

connections beveled for weld, flanged (optional) or grooved 

(optional). 

I. Drift Eliminators: PVC, for long life and durability resistant to rot, 

decay and biological attack; formed, bonded together for strength 

and durability in block format for easy removal and replacement; 

self extinguishing with flame spread rating of 5 per ASTM E84- 

81a; 0.001% drift rate. 

J. Water Level Control: Brass mechanical makeup water valve and 

plastic float with an adjustable linkage. 

K. Water Recirculation Pump: Close-coupled, centrifugal type with 

mechanical seal. The pump motor shall be ____ horsepower 

totally enclosed for outdoor service on ____ volts, ____ hertz, 

and ____ phase. 

2.4 MOTORS AND DRIVES 

A. General requirements for motors are specified in Division 23 

Section “Motors”. 

B. Enclosure Type: TEFC 

C. Fan Motor Speed: Premium Efficient VFD Duty (Option: 2-speed) 

D. Drive: Power Band Belt designed for 150% of the motor 

nameplate HP. 

1. Belt: V-belt type neoprene. 

2. Sheaves: Steel, taper lock design. 

3. Bearings: Heavy duty, self-aligning bearings with extended 

grease lines and fittings. 

4. Fan Shaft: Solid steel. 

5. Vibration Cutout Switch (Optional): Mechanical switch to deenergize 

fan motors if excessive vibration in NEMA 4 

enclosure. 

2.5 MAINTENANCE ACCESS 

A. Access Door (Optional): A man-sized access door shall be 

located above the basin on both ends of the unit to allow for easy 

access to the pan interior. 

B. Ladders (Optional): Aluminum, vertical complying with 29 CFR 

1910.27. 

23 

®

World W Headquarters/ 

Research Re and 

Development D Center 

EVAPCO Facilities 

EVAPCO North America 

EVAPCO, Inc. 

World Headquarters 

P.O. Box 1300 

Westminster, MD 21158 USA 

Phone: 410-756-2600 

Fax: 410-756-6450 

E-mail: marketing@evapco.com 

EVAPCO East 

5151 Allendale Lane 

Taneytown, MD 21787 USA 

Phone: 410-756-2600 

Fax: 410-756-6450 

E-mail: marketing@evapco.com 

EVAPCO Midwest 

1723 York Road 

Greenup, IL 62428 USA 

Phone: 217-923-3431 

Fax: 217-923-3300 

E-mail: evapcomw@evapcomw.com 

EVAPCO West 

1900 West Almond Avenue 

Madera, CA 93637 USA 

Phone: 559-673-2207 

Fax: 559-673-2378 

E-mail: contact@evapcowest.com 

EVAPCO Iowa 

925 Quality Drive 

Lake View, IA 51450 USA 

Phone: 712-657-3223 

Fax: 712-657-3226 

EVAPCO Iowa 

Sales & Engineering 

1234 Brady Boulevard 

Owatonna, MN 55060 USA 

Phone: 507-446-8005 

Fax: 507-446-8239 

E-mail: evapcomn@evapcomn.com 

EVAPCO PRODUCTS ARE MANUFACTURED WORLDWIDE 

EVAPCO, Inc. — World Headquarters & Research/Development Center 

EVAPCO...SPECIALISTS IN HEAT TRANSFER 

PRODUCTS AND SERVICES. 

5M/04-10/DGD 

EVAPCO, Inc. • P.O. Box 1300 • Westminster, MD 21158 USA 

PHONE: 410-756-2600 • FAX: 410-756-6450 • E-MAIL: marketing@evapco.com 

Refrigeration Valves & 

Systems Corporation 

A wholly owned subsidiary of EVAPCO, Inc. 

1520 Crosswind Dr. 

Bryan, TX 77808 USA 

Phone: 979-778-0095 

Fax: 979-778-0030 

E-mail: rvs@rvscorp.com 

McCormack Coil Company, Inc. 


P.O. Box 1727 

6333 S.W. Lakeview Boulevard 

Lake Oswego, OR 97035 USA 

Phone: 503-639-2137 

Fax: 503-639-1800 

E-mail: mail@mmccoil.com 

EvapTech, Inc. 


8331 Nieman Road 

Lenexa, KS 66214 USA 

Phone: 913-322-5165 

Fax: 913-322-5166 

E-mail: marketing@evaptech.com 

Tower Components, Inc. 


5960 US HWY 64E 

Ramseur, NC 27316 

Phone: 336-824-2102 

Fax: 336-824-2190 

E-mail: mail@towercomponentsinc.com 

EVAPCO Newton 

701 East Jourdan Street 

Newton, IL 62448 USA 

Phone: 618-783-3433 

Fax: 618-783-3499 

E-mail: evapcomw@evapcomw.com 

EVAPCO Europe 

Member MCAA 

Mechanical Contractors Association of America 

EVAPCO Europe, N.V. 

European Headquarters 

Industrieterrein Oost 4010 

3700 Tongeren, Belgium 

Phone: (32) 12-395029 

Fax: (32) 12-238527 

E-mail: evapco.europe@evapco.be 

EVAPCO Europe, S.r.l. 

Via Ciro Menotti 10 

I-20017 Passirana di Rho 

Milan, Italy 

Phone: (39) 02-939-9041 

Fax: (39) 02-935-00840 

E-mail: evapcoeurope@evapco.it 

EVAPCO Europe, S.r.l. 

Via Dosso 2 

23020 Piateda Sondrio, Italy 

EVAPCO Europe, GmbH 

Bovert 22 

D-40670 Meerbusch, Germany 

Phone: (49) 2159-69560 

Fax: (49) 2159-695611 

E-mail: info@evapco.de 

Flex coil a/s 

A subsidiary of EVAPCO, Inc. 

Knøsgårdvej 115 

DK-9440 Aabybro Denmark 

Phone: (45) 9824 4999 

Fax: (45) 9824 4990 

E-mail: info@flexcoil.dk 

EVAPCO S.A. (Pty.) Ltd. 

A licensed manufacturer of EVAPCO, Inc. 

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 

Tiba Engineering Industries Co. 


5 Al Nasr Road St. 

Nasr City, Cairo, Egypt 

Phone: (20) 2-290-7483/(20) 2-291-3610 

Fax: (20) 2-404-4667/ (20) 2-290-0892 

E-mail: manzgroup@tedata.net.eg 

Visit EVAPCO’s Website at: http://www.evapco.com 

EVAPCO Asia/Pacific 

EVAPCO Asia/Pacific Headquarters 

1159 Luoning Rd. Baoshan Industrial Zone 

Shanghai, P. R. China, Postal Code: 200949 

Phone: (86) 21-6687-7786 

Fax: (86) 21-6687-7008 

E-mail: marketing@evapcochina.com 

Evapco (Shanghai) Refrigeration 

Equipment Co., Ltd. 

1159 Louning Rd., Baoshan Industrial Zone 

Shanghai, P.R. China, Postal Code: 200949 

Phone: (86) 21-6687-7786 

Fax: (86) 21-6687-7008 

E-mail: marketing@evapcochina.com 

Beijing EVAPCO Refrigeration 

Equipment Co., Ltd. 

Yan Qi Industrial Development District 

Huai Rou County 

Beijing, P.R. China, Postal Code: 101407 

Phone: (86) 10 6166-7238 

Fax: (86) 10 6166-7395 

E-mail: evapcobj@evapcochina.com 

Evapco Australia (Pty.) Ltd. 


34-42 Melbourne St. 

P.O. Box 436 

Riverstone, N.S.W. Australia 2765 

Phone: (61) 29 627-3322 

Fax: (61) 29 627-1715 

E-mail: sales@evapco.com.au 

EvapTech Asia Pacific Sdn. Bhd 

A wholly owned subsidiary of EvapTech, Inc. 

IOI Business Park, 2/F Unit 21 

Persiaran Puchong Jaya Selatan 

Bandar Puchong Jaya, 

47170 Puchong, Selangor, Malaysia 

Phone: (60-3) 8070 7255 

Fax: (60-3) 8070 5731 

E-mail: marketing-ap@evaptech.com 

©2010 EVAPCO, Inc.

PMWQ Product Catalog - EVAPCO.com

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