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Bulletin 331A 

A DVANCED T ECHNOLOGY IN 

INDUCED DRAFT, COUNTERFLOW COOLING TOWERS 

32 to 4120 NOMINAL TONS 

(139 TO 18,114kW) 

T ECHNOLOGY FOR THE F UTURE...AVAILABLE T ODAY!

THE ADVANCED TECHNOLOGY DESIGN PROVIDING 

EVAPCO, Inc., continues its dedication 

to advancements in induced draft, 

counterflow cooling tower technology 

and easy maintenance with the 

Advanced Technology Cooling Tower...The EVAPCO AT! 

The AT is the result of decades of engineering success based 

on easy maintenance, durable construction and a highly 

efficient design. The AT brings marquee features that make 

it the better choice in cooling towers. These features are 

presented in this exclusive AT Marketing brochure. 

† 

Since its founding in 1976, 

EVAPCO, Inc. has become 

a world-wide leader in supplying 

quality cooling equipment 

for thousands of customers in 

both the commercial and industrial 

markets. 

EVAPCO’s success has been the result 

of a continual commitment to 

product improvement, quality 

workmanship and a dedication to 

providing unparalleled service. 

Our emphasis on research and development 

has led to many product 

innovations – a hallmark of 

EVAPCO through the years. 

The ongoing R & D Program enables 

EVAPCO to provide the most 

advanced products in the industry 

– technology for the future, available 

today. 

With 16 facilities in seven countries 

and over 170 sales offices in 

42 countries world-wide, EVAPCO 

is ready to assist in all your equipment 

needs. 

©2008 EVAPCO, INC. 

EVAPCO Power-Band Drive System 

• The AT Cooling Tower features the highly successful, easy 

maintenance, heavy duty Power-Band Drive System. 

• Standard heavy-duty pillow block bearings with a minimum 

L10 life of 75,000 hours. 

• Extended lube lines. 

• External motor/belt adjustment. 

• Aluminum Alloy Sheaves, Solid-Back Multi-Groove Power-Band 

Belts and Totally Enclosed motors are standard. 

• Five (5) Year Motor and Drive Warranty. 

EVAPCOAT Corrosion Protection System 

Totally Enclosed Fan Motors 

• Motors positioned for external access. 

• Assures long life. 

• Motor location allows for easy accessibility 

and serviceability. 

• Five (5) Year motor warranty. 

• G-235 Galvanized Steel Construction and Stainless Steel Strainers–EVAPCO set the 

standard with 2.35oz. of zinc per square foot of surface area. 

• Another EVAPCO standard–the stainless steel suction strainer eliminates excessive 

wear and corrosion. 

• Non-corrosive PVC Water Distribution System, Drift Eliminators and Inlet Louvers. 

• This system provides maximum corrosion protection as standard. 

2 

NEW! 

Louver Access Door 

• Hinged access panel with quick 

release mechanism 

• Allows easy access to perform 

routine maintenance and inspection 

of the makeup assembly, 

strainer screen and basin 

• Available on models with 5 ft. 

and 6 ft. tall louver sizes 

NEW! 

Easy Field Assembly 

• A new field assembly seam design 

which ensures easier assembly and 

reduced potential for field seam leaks 

• Self-guided channels guide the fan 

casing section into position improving 

the quality of the field seam 

• Eliminates up to 66% of fasteners 

† Mark owned by the Cooling Technology Institute

E ASIER S OLUTIONS AND B ETTER C HOICES 

Available in 55 Cross Sections and a capacity range of 32 to 4120 Nominal 

Tons (139 to 18,114 kW)! The AT has a model for every application. 

If there is an application for which the standard catalog product line does not work, EVAPCO will make a 

cooling tower that will fit your requirement! Consult your local EVAPCO Representative or the factory for 

all your cooling tower needs. 

CTI Certified-Standard 201 

• Independent Certification. 

• Eliminates necessity for costly field 

performance tests. 

Optional Motor Davit and Working Platform 

Motor Davit 

• Motor davit and bracket option for easy motor removal. 

• Also available for Gearbox removal. 

Platform 

• Platform and ladder arrangement available as an option. 

• Provides additional working surface for the service mechanic. 

Smooth Flow Fan 

• Soft-connect blade to 

hub design. 

• VFD-friendly 

• Eliminates critical blade passing 

frequencies at any speed. 

(Not available on 4 ft. wide models) 

Exclusive 5 Year Motor 

& Drive Warranty 

• Covers the complete drive 

system, including the motor. 

• Covers all drive components on 

belt or gear drive units. 

• Standard on all AT Models. 

• Upgraded 5 year Complete 

Product warranty on models 

with optional stainless steel 

construction. 

AT 

EVAPCO unequivocally 

guarantees the thermal 

performance of the AT 

cooling tower product line. 

NEW! EvapJet Nozzle 

Water Distribution System 

• Non-corrosive PVC construction with new EvapJet 

nozzles. 

• Large orifice nozzles prevent clogging and are 

threaded for easy removal and positive positioning. 

• 66% fewer nozzles! 

• System branches have threaded end caps to assist 

with debris removal. 

Clean Pan Sloped 

Basin Design 

Quick Connect Piping System 

• All inlet and outlet piping connections are 

beveled for welding and grooved to accept 

a mechanical coupling device as standard. 

• Facilitates easy pipe connections for quick 

installation. 

• Flanged connections are available as an 

option. (See page 10 Optional Equipment) 

• Designed to 

completely drain the 

cold water basin. 

• Helps prevent buildup 

of sediment and 

biological film. 

• Eliminates standing 

water after drain 

down. 

(See details of 

design on page 6) 

3

E ASY S OLUTIONS, BETTER C HOICES! 

D ESIGN A DVANTAGES 

The Advanced Technology Design 

The AT Cooling Tower product line is an Advanced Technology design which utilizes induced draft, counterflow technology–the 

most efficient in the industry and the best design for operation in a freezing climate. The counterflow design provides the AT 

Cooling Tower with inherently better operational and maintenance features. These features are described below. 

Cool Dry 

Entering Air 

Hot Saturated Discharge Air 

Air Intake 

Splashout 

Hot Water In 

Cooled 

Water Out 

Sunlight 

Debris 

Principle of Operation 

Warm water from the heat source is pumped to the water distribution system 

at the top of the tower. The water is distributed over the wet deck fill by 

means of large orifice nozzles. Simultaneously, air is drawn in through the air 

inlet louvers at the base of the tower and travels upward through the wet 

deck fill opposite the water flow. A small portion of the water is evaporated 

which removes the heat from the remaining water. The warm moist air is 

drawn to the top of the cooling tower by the fan and discharged to the atmosphere. 

The cooled water drains to the basin at the bottom of the tower 

and is returned to the heat source. 

The vertical air discharge of the AT design and the distance between the 

discharge air and fresh air intakes, reduces the chance of air recirculation, 

since the warm humid air is directed up and away from the unit. For detailed 

layout information please consult EVAPCO’s Equipment Layout Guidelines Bulletin 

311. 

Patented * Efficient Drift Eliminators 

An extremely efficient drift eliminator system is standard on the AT Cooling 

Tower. The system removes entrained water droplets from the air stream to 

limit the drift rate to less than 0.001% of the recirculating water rate. 

With a low drift rate, the AT Cooling Tower saves valuable water and water 

treatment chemicals. The AT can be located in areas where minimum water 

carryover is critical, such as parking lots. 

The drift eliminators are constructed of an inert polyvinyl chloride (PVC) plastic 

material which effectively eliminates corrosion of these vital components. 

They are assembled in sections to facilitate easy removal for inspection of the 

water distribution system. 

Patented ** EVAPAK ® Fill 

The patented EVAPAK ® fill design used in the AT Cooling Tower is specially designed 

to induce highly turbulent mixing of the air and water for superior heat 

transfer. Special drainage tips allow high water loadings without excessive pressure 

drop. The fill is constructed of inert polyvinyl chloride, (PVC), will not rot or 

decay, and is formulated to withstand water temperatures of 130˚F (55˚C). Because 

of the unique way in which the crossfluted sheets are bonded together, 

and the bottom support of the fill section, the structural integrity of the fill is 

greatly enhanced, making the fill usable as a working platform. 

The fill selected for the AT Cooling Tower has excellent fire resistant qualities. 

AT Cooling Tower fill has a flame spread rating of 5 per ASTM-E84-81a. 

A higher temperature fill is available for water temperatures exceeding 

130˚F (55˚C). Consult your EVAPCO representative for further details. 

Superior Air Inlet Louver and Screen Design 

The air inlet louver screens on the AT are constructed of corrosion-free PVC. 

They are a bi-planar design that eliminates splashout and reduces the potential 

for algae formation inside the tower. 

In uni-planar louver systems used by other manufacturers, circulating water 

droplets tend to splashout, especially when the fans are shut off. With the exclusive 

EVAPCO bi-planar louver system, the water droplets are captured on the 

inward sloping pass, eliminating splashout and the problems associated with it. 

EVAPCO’s patented louver design completely encloses the basin area. In addition 

to eliminating splash out, EVAPCO’s inlet louver screens are of a ‘Sight 

Tight’ design. Direct sunlight is blocked from the water inside the cooling 

tower, thereby reducing the potential of algae formation. Water treatment 

and maintenance costs are substantially reduced. 

While effectively containing the recirculating water and blocking sunlight, the 

louver design has a low pressure drop. The low pressure drop results in lower fan 

energy consumption, which reduces the operating costs of the cooling tower. 

* U.S. Patent No. 631580481 ** U.S. Patent No. 5124087 

4


D ESIGN A DVANTAGES 

Reduced Piping Costs 

Each cell of the AT Cooling Tower is furnished with one inlet and 

one outlet piping connection. This design reduces the amount of 

external piping and thereby lowers the installed cost of the cooling 

tower. The water distribution system is pressurized and self balancing. 

Since field balancing is not required on the AT, the need for 

flow balancing valves is eliminated, further reducing the cost of 

tower installation. The wide orifice nozzles with anti-sludge ring 

used in the AT water distribution system helps prevent clogging, reducing 

the maintenance costs of the water distribution system. 

Pressurized Water Distribution System 

The water distribution system is made of schedule 40 PVC pipe and 

EvapJet ABS plastic water diffusers for corrosion protection in this 

key area. The piping is easily removable for cleaning. The water 

diffusers have a 1 inch diameter (25mm) opening and are practically 

impossible to clog. They also have an anti-sludge ring extending 

into the headers to prevent 

sediment from building up in the 

diffuser opening. In addition, the 

spray branches have threaded end 

caps to allow easy debris removal. 

The spray pressure for all AT Cooling 

Towers is between 1 and 6 psig (7 

and 42 kPa) at the inlet header. The 

New EvapJet nozzle compared 

to previous EVAPCO nozzles 

actual spray pressure will be shown 

on the certified drawings which are 

prepared for each unit. 

Optimum Design for Freezing Climates 

The counterflow fill design used in the AT Cooling Tower is well 

suited for winter operation. The wet deck surface is totally encased, 

and protected from freezing winds thus inhibiting ice formation 

on the fill section. 

The even temperature gradient of the counterflow fill design 

makes the AT Cooling Tower the ideal unit for operation in freezing 

climates. 

The counterflow design of the AT Cooling Tower fill section reduces 

the chance of ice formation and with bottom support, eliminates 

fill collapse should ice form. 

Fast, On-Time Shipments 

The AT is a completely factory assembled cooling tower manufactured 

by a dedicated professional workforce, expert in building 

cooling towers. Factory trained mechanics and EVAPCO’s strict 

quality control and inspection procedures guarantee the quality of 

every unit shipped. 

EVAPCO’s controlled factory environment ensures fast on-time shipments, 

allowing the AT to be available WHEN THE CUSTOMER 

WANTS IT! 

5


M AINTENANCE A DVANTAGES 

The Advanced Technology Easy Maintenance Basin Design 

The cold water basin is the most important area of a cooling tower to maintain. As a result of the evaporation process in a 

cooling tower, dirt and debris will collect in the basin and must be cleaned out on a regular basis. EVAPCO’s AT basin section is 

designed to allow quick and easy access—promoting maintenance of the cold water basin. The basin features the following: 

Easy Access 

The cold water basin section is easily accessible from ground level by simply 

loosening the (2) two Quick Release Fasteners on the inlet louver assemblies 

surrounding the cooling tower and lifting out the lightweight louver. 

The basin can be accessed from all (4) four sides of the cooling tower. The 

bottom of the fill section is a minimum of four (4) feet (1.2m) above the 

basin floor. This open basin design enables the AT basin to be easily cleaned. 

Louver Access Door (optional) 

To aid in basin maintenance, all AT models can be equipped with an 

optional louver access door. This feature allows easy access to perform 

routine maintenance and inspection of the makeup assembly, strainer 

screen and basin without removing an entire inlet louver. The louver 

access door is standard on models with 5 and 6 ft. tall louver sizes. 

Easy, Removable Air Inlet Louvers with Quick 

Release Fasteners 

The AT features a Quick Release Fastener design consisting of (2) two large 

thumbscrews and a retaining bracket system. By loosening the thumbscrews, 

the retaining bracket lifts away from the louver frame, allowing 

the louver to be removed while the retaining bracket and thumbscrews stay 

on the cooling tower. 

• Design allows quick removal of louvers. 

• Louver fastener is large and easy to release. 

• Louver fastener remains on the unit–eliminating the possibility of 

missing hardware. 

Clean Pan Basin Design 

The AT features a completely sloped basin from the upper to lower pan section. 

This “Clean Pan” design allows the water to be completely drained 

from the basin. The cooling tower water will drain from the upper section 

to the depressed lower pan section where the dirt and debris can be easily 

flushed out through the drain. This design helps prevent buildup of sedimentary 

deposits, biological films and minimizes standing water. 

Note: on 4' wide units, the pan is sloped without the step 

Stainless Steel Strainers 

The EVAPCO standard for many years, the stainless steel strainer is one 

component of the cooling tower subject to excessive wear and corrosion. 

With stainless steel construction, this component will last the life of the 

cooling tower. 

6


M AINTENANCE A DVANTAGES 

The Advanced Technology Easy Maintenance Drive System 

The EVAPCO POWER-BAND drive system utilized on the AT Cooling Tower is the easiest drive system to maintain in 

the industry. There is no need to stand inside the cold water basin to service the bearings, belts, gear reducers, floating 

shafts or electrical equipment. In addition, there is no need for fan deck handrails or safety cages, since all periodic maintenance 

can be safely performed from the side of the AT. The most important features of this design are listed below. 

Models AT 19-56 through AT 39-942 

Motor Mount, Power Band Belt Adjustment and Bearing Lubrication 

The fan motor and drive assembly are designed to allow easy servicing of the motor and adjustment of the belt tension from 

the exterior of the unit. The T.E.F.C. fan motor is mounted on the outside on these models and is protected from the weather 

by a cover which swings away for maintenance. 

A large hinged access door is located on the side of the unit for easy access to the fan drive system. The belt can be adjusted 

by tightening the J-Bolts on the motor base and the tension can be checked easily through the access door, all while standing 

at the side of the unit. The 

bearings can also be lubricated 

from the side of the 

unit. The bearing lubrication 

lines have been extended to 

the exterior casing and are 

located by the access door, 

thus making bearing lubrication 

easy. 

Sloped access ladders and 

working platforms are 

available as an option to 

facilitate maintenance. 

See page 9 Optional 

Equipment for details. 

Models AT 110-112 through AT 428-1248 

Motor Mount, Power Band Belt Adjustment and Bearing Lubrication 

The T.E.A.O. fan motor is located inside the fan casing on the large AT 

Cooling Tower, and is mounted on a rugged heavy duty motor base. The 

motor base is designed to swing completely to the outside of the unit 

through a very large hinged (14 square feet) (1.3 square meters) access 

door greatly simplifying motor maintenance. 

The unique swinging motor mount designed for these models features 

easy belt adjustment from the exterior of the unit. The T.E.A.O. fan 

motor is mounted on an adjustable base which is supported by two heavy 

duty galvanized steel pipes. The belt is adjusted by tightening an allthread 

which runs through the motor base. 

The innovative motor base features a unique locking mechanism for a 

positive belt adjustment and is also used to adjust the belt tension if a 

wrench is not available. 

Bearing lubrication fittings are extended 

to the side of the unit inside the access 

door to allow easy application of the bearing 

lubricant. This external location allows 

for easy servicing of the bearings and 

is another important advantage of 

EVAPCO equipment. 

To facilitate motor removal, an optional 

motor davit is available. See Optional 

Equipment page 9 of this brochure. 

7


D RIVE S YSTEM D ESIGN 

The Advanced Technology POWER-BAND Drive System Design 

The AT Cooling Tower features the highly successful EVAPCO POWER-BAND Belt Drive System engineered for heavy-duty operation. 

The POWER-BAND Drive System has consistently provided trouble-free operation in the most severe duty cooling tower applications. 

In addition, the complete drive system including the fan motor is standard with a (5) Five Year Motor & Drive Warranty. 

Fan Motors 

All AT Cooling Tower models utilize heavy duty totally enclosed (T.E.F.C. or 

T.E.A.O.) fan motors designed specifically for cooling tower applications. In 

addition to the standard motors offered on each cooling tower, EVAPCO offers 

many optional motors to meet your specific needs, including: 

• Premium Efficiency Motors 

• Multi-Speed Motors 

• Inverter-Duty Motors for VFD Applications 

Models AT 14-64 through 14-912 have a direct drive fan system. The T.E.A.O. 

motor is located inside the cooling tower. 

The T.E.F.C. motors are located on the outside of the unit on Models AT 

19-56 through AT 39-942 and are protected by a hinged, swing away cover. 

Models AT 110-112 through 428-1248 have T.E.A.O. motors located inside the 

fan section on a heavy duty motor base which swings to the outside for repair 

or removal. 

On Models AT 14-64 through 14-912 



Power-Band Belt Drive 

The Power-Band drive is a solid-back multigroove belt system that has 

high lateral rigidity. The belt is designed for cooling tower service, and is 

constructed of neoprene with polyester cords. The drive belt is sized for 

150 percent of the motor nameplate horsepower ensuring long and 

trouble free operation. 

Drive System Sheaves 

Drive system sheaves located in the warm, moist atmosphere inside the 

cooling tower are constructed of an aluminum alloy. Those located 

externally are protected by a hinged protective cover. 

Fan Shaft Bearings 

The fan shaft bearings on the AT cooling tower are specially selected to 

provide long life, minimizing costly downtime. They are rated for an L-10 

life of 75,000 to 135,000 hours, making them the heaviest duty pillow 

block bearing in the industry used for cooling tower duty. 

Five Year Motor and Drive Warranty 

EVAPCO provides a standard 5 year motor and drive warranty on all 

Power-Band belt drive and optional gear drive AT Cooling Towers. This 

unique warranty is designed to offer the end user optimum protection 

against fan drive and motor failure. It is a comprehensive plan which 

includes the fan, fan shaft, belts, sheaves, fan bearings, gear box, flexible 

coupling, driveshaft and the motor. 

8


O PTIONAL E QUIPMENT 

Optional Equipment 

The standard design of the EVAPCO AT provides the customer with the easiest cooling tower to maintain in the industry. 

There are additional options which can make maintenance easier and extend the life of the cooling tower. These options 

are listed below. 

Sloped Access Ladders 

The EVAPCO designed access ladder features a sloped “ships type” 

ladder arrangement which provides fast and easy access to the 

water distribution system and drive components. A handrail is attached 

to the sloped ladder for safe and easy ascent and descent. 

There is no need for safety cages with this design. The ladder(s) 

will ship loose and must be field mounted. Meets all applicable 

OSHA requirements. 

Note: The sloped access ladder is available on all models AT 19-56 

through AT 428-1248. A vertical ladder is available on models AT 14- 

64 through 14-912. 

Working Platform & Ladder with Davit 

AT Cooling Towers are available with an external working platform 

and ladder to allow easy servicing of the fan motor and water distribution 

system. Providing a convenient platform to perform 

work, the heavy duty galvanized steel platform is self-supportingwhich 

eliminates the need for any external support. A less expensive 

alternative to field erected catwalks, the working platform 

option uses a straight ladder as standard and ships in sections for 

easy installation. (The working platform and ladder meet all applicable 

OSHA requirements.) 

Note: The Working Platform is not available on models AT 14-64 

through 14-912. 

The davit option eliminates crane rentals and facilitates the removal 

of motors and gear drives. The davit and bracket are constructed of 

aluminum and are mounted on the side of the unit. The optional 

fan motor and gear davit ships loose and is installed in the field. 

*Louver frame and support not in photo 

Stainless Steel Water Touch Basin 

The AT Cooling Tower has a modular design which allows specific 

areas to be enhanced for increased corrosion protection. The basin 

area of the cooling tower experiences turbulent mixing of air and 

water, in addition to silt build-up. In conjunction with the EVAP- 

COAT Corrosion Protection System, EVAPCO offers an optional Stainless 

Steel Water Touch Basin. This option provides Type 304 or Type 

316 stainless steel for the entire basin area including the support 

columns of the cooling tower and the louver frames. 

The basin section provides the structural support for the unit and is 

the most important part of the cooling tower. The Stainless Steel 

Water Touch Basin provides maximum corrosion protection. 

Basin Level Platform 

AT Cooling Towers are available on some box sizes with a basin level 

platform and ladder to allow easy servicing of the cold water basin. 

• Facilitates Maintenance 

- Adjust Float Assembly 

- Clean Basin and Suction Strainer 

• Self Supporting and Easy Installation 

- Platform Supported from Unit 

- Ladder Requires Field Support 

- Ships in Modules for Easy Installation 

9


O PTIONAL E QUIPMENT 

Electric Heaters 

Electric immersion heaters are available as an option and are located in the 

basin of the tower. They are sized to maintain a +40° F (4.5°C) pan water 

temperature at 0°F (-18°C) ambient with the fans off*. They are furnished 

with a combination thermostat/low water protection device to cycle the 

heater on when required and to prevent the heater elements from energizing 

unless they are completely submerged. All components are enclosed in 

rugged, weather proof enclosures for outdoor use. Heater control packages 

that include contactor, transformer or disconnects are available, consult your 

local EVAPCO representative. 

(*) - Electric heater selection based on 0°F (-18°C) ambient temperature. 

For alternate low ambient heater selections, consult factory. Refer to the 

factory certified heater drawing for quantity and sizing of heaters. 

Electric Water Level Control 

EVAPCO cooling towers are available with an optional electric water level 

control system in place of the standard mechanical makeup valve and float 

assembly. This package provides very accurate control for the basin water 

level and does not require field adjustment, even under varying operating 

conditions. 

The control was designed by EVAPCO and is manufactured exclusively for 

EVAPCO. It consists of multiple heavy duty stainless steel electrodes. These 

electrodes are mounted external to the unit in a vertical stand pipe. For 

winter operation, the stand pipe must be wrapped with electric heating 

cable and insulated to protect it from freezing. 

The weather protected slow closing solenoid valve(s) for the makeup water 

connection is factory supplied and is ready for piping to a water supply with 

a pressure between 25 and 50 psig (172 and 345 kPa). 

Flanged Connections 

Bypass Connections with 

Diffuser Hood 

Equalizers and 

Flume Plates 

Other Options 

• Heater Control Packages 

• Hot Water or Steam Coils 

• Steam Injectors 

• Bottom Suction Connections 

• Vibration Isolators (single cell only) 

• Vibration Switches 

• Remote Sump Connections 

• Motors–Energy Efficient / Inverter Duty / 

2S/1W and 2S/2W / Mill and Chem Duty 

Automotive Duty and Many More, 

Consult the Factory 

Technical Support Services 

iES the internet Equipment Solution 

iES is a Web based computer selection program which allows 

the design engineer to choose EVAPCO models and optimize 

unit selections. The program allows the engineer to evaluate 

the equipment’s thermal performance, space and energy requirements. 

Once the model is selected and optional equipment 

features are inserted, the engineer may output a 

complete specification AND a unit drawing from this program. 

The software is designed to provide the user with maximum 

flexibility in analyzing the various selection parameters 

while in a friendly and familiar Windows format. 

The iES Equipment Selection Software program may be accessed 

using Microsoft Internet Explorer after contacting your 

local EVAPCO sales representative. Users may make Requests 

for Quotations through the website or by e-mailing EVAPCO 

at this address marketing@evapco.com 

EVAPCO’s Website 

Log on to EVAPCO’s new and improved website 

http://www.evapco.com. for expanded product information. 

Users can view and download unit certified and steel 

support drawings in a .pdf format readable using Adobe 

Acrobat. In addition, scaled isometric views of our equipment 

in CAD (.dwg format) are also available. Product literature, 

Rigging and Maintenance Instructions and EVAPCO 

logo apparel and merchandise are all accessible online from 

your computer. 

With the internet Equipment Solution program, equipment selections, 

written specifications, unit drawing files and EVAPCO 

on-line information are readily available from the comfort of 

your own office! 

10


LOW SOUND SOLUTIONS 

The Expanded Family of the EVAPCO Super Low Sound Fans! 

Super Low Sound Fan 9 – 15 dB(A) Reduction! 

The Super Low Sound Fan offered by EVAPCO utilizes an extremely wide chord blade 

design available for sound sensitive applications where the lowest sound levels are 

desired. The fan is one-piece molded heavy duty FRP construction utilizing a forward 

swept blade design. The Super Low Sound fan is capable of reducing the unit sound 

pressure levels 9 dB(A) to 15 dB(A), depending on specific unit selection and measurement 

location compared to the original AT fan. 

Low Sound Fan* 4 – 7 dB(A) Reduction! 

The NEW Low Sound Fan offered by EVAPCO is a wide chord blade design for sound sensitive 

applications where low sound levels are desired. The Low Sound Fan shall utilize a 

unique soft-connect blade-to-hub design that is compatible with Variable Speed Drives. 

Since the blades are not rigidly connected to the fan hub, no vertical vibration forces are 

transmitted to the unit structure which totally eliminates sound pressure levels 4 dB(A) to 

7 dB(A), depending on specific unit selection and measurement location. The fans are 

high efficiency axial propeller type and are CTI Certified on the AT line of Cooling Towers. 

The Low Sound Fan is NOT available on the UT Cooling Tower. 

* The CTI Certified Low Sound Fan will have a thermal performance derate up to 3.5%. 

Consult the factory or iES Program for actual thermal performance. 

Fan Discharge Sound Attenuation – Up to 10 dB(A) Reduction! 

The discharge attenuator is a factory assembled straight sided discharge hood designed 

to reduce overall discharge sound levels at full fan speed 5 dB(A) to 10 dB(A), depending 

on specific unit selection and measurement location. It is constructed of G-235 galvanized 

steel as standard (options available for Type 304 stainless steel) and includes 

insulated walls and a low pressure drop baffling system that is acoustically lined with 

high density fiberglass. The discharge attenuator is supported entirely by the unit and is 

shipped as an assembled section for easy mounting in the field. The discharge attenuator 

is covered by a heavy gauge hot-dip galvanized steel fan guard to prevent debris 

from entering the attenuator. 

The discharge attenuator will have a minimal impact on unit thermal performance (0%- 

2% derate depending on specific unit selection). 

The discharge attenuator is available on 10 ft., 12 ft., 14 ft., 20 ft., 24 ft. and 28 ft. wide 

AT Models with the Low Sound Fan option. 

(Note: The Fan Discharge Attenuator Option is NOT available on UT or USS Models 

provided with the Super Low Sound Fan.) 

Water Silencer–Reduces Water Noise in the Cold Water Basin up to 7 

dB(A)! 

The water silencer option is available for all induced draft models and is located in the 

falling water area of the cold water basin. The water silencer will reduce the high frequency 

noise associated with the falling water and is capable of reducing overall sound 

levels 4 dB(A) to 7 dB(A) measured at 5 ft. from the side or end of the unit. The water 

silencers reduce overall sound levels 9 dB(A) to 12 dB(A) (depending on water loading 

and louver height) measured 5 ft. from the side or end of the unit when water is circulated 

with fans off. 

The water silencers are constructed of lightweight PVC sections and can be easily removed 

for access to the basin area. The water silencer will have no impact on unit thermal performance. 

Note: These items are not available for the AT/USS 14-64 through 14-912 cooling towers. 

11


Notes: 

12

T ECHNOLOGY FOR THE F UTURE, AVAILABLE T ODAY! 

IBC COMPLIANCE 

We Stand Tall 

Through it All! 

The Internationaltional 

Building Code (IBC) is a 

comprehensive set of 

regulations addressing 

the structural ral design 

and installationtion 

requirements for 

building systems stems – 

including HVAC 

and industrial 

refrigeration 

equipment. . 

IBC 

COMPLIANCE 

With the advent 

of the IBC, 

EVAPCO is 

proud to 

introduce the new and 

improved line of AT, UT and USS 

Cooling Towers with IBC 2006 

compliance standard. 

Wind, Rain, 

Earthquake 

and Hurricane 

EVAPCO Cooling Towers…designed to 

withstand seismic or wind load forces. 

13



In its continuing commitment to be the leader in evaporative cooling equipment design and 

services, EVAPCO AT Cooling Towers are now Independently Certified to withstand Seismic and 

Wind Loads in ALL Geographic Locations and Installations in accordance with IBC 2006. 

What is IBC? 

International Building Code 

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 

or wind load forces as the building to which 

they are attached. 

How Does IBC 2006 Apply to Cooling 

Towers? 

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 cooling tower must be designed to withstand 

the greater of either the seismic or wind load. 

The New AT is offered with a choice of TWO structural 

design packages: 

• Standard Structural Design – For projects with 

1.0g seismic or 60 psf wind loads 

• Upgraded Structural Design – Required for 

projects with > 1.0 g seismic or 60 psf wind loads 

All locations with design criteria resulting in a seismic 

design force of up to 1.0g or a wind load of 60 psf or 

below will be provided with the standard AT 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 AT is 

designed for 5.12 g and 145 psf making it applicable 

to ALL building locations in North America. 

Seismic Design 

The chart shown below, 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 are most 

likely to require the upgraded AT construction design 

based on the site seismic design factors. 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 will then apply these factors to a 

series of charts and graphs to determine the appropriate 

seismic design factors based 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 shown on the next page. 

< – 

14

ID IBC COC 00 



Wind Design 

The IBC 2006 code book includes a map of basic wind 

speed (3-second 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 shown on 

Page 16. 

Whichever design force - seismic or wind - is more severe 

for the building, governs the design of the building and 

all attached equipment. 

Certificate of Compliance 

AT, USS, UAT, UT Cooling Towers 

ATW Closed Circuit Coolers 

HTC,ATC-E 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: 

Referenced Report: 

IBC 2006 

VMA-43387 

ASCE-7 

NFPA 5000 

Approval Agency: 

VMC Seismic Consulting Group 

EVAPCO...Specialists 

in Heat Transfer Products and Services. 

1 

If the seismic “g force” or wind load psf 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. 

Wind Load Map Courtesy IBC 2006 Text – 

See full-sized map for location specific values 

Design Implementation 

EVAPCO applies the seismic design and wind load information 

provided for the project 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. 

Independent Certification 

Although the IBC references and is based on the structural 

building code ASCE 7, many chapters and paragraphs 

of ASCE 7 are superceded by the IBC, independent 

certification and methods of analysis are such paragraphs. 

Per the most recent edition of the code, the EVAPCO 

compliance process included an intensive 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 

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, The VMC Group, to complete the independent 

equipment testing and analysis. 

When using the EVAPCO selection software to make a 

selection, these calculations are already incorporated 

into the selection process. Simply enter the required 

factors and the Seismic Design Force and Wind Load 

will be calculated automatically!! 

For further questions regarding IBC compliance, please 

contact your local EVAPCO Representative or visit 

www.evapco.com. 

Seismic Load Calculations 

The data required to calculate the seismic load are: 

Occupancy Category – I, II, III or IV depending on the 

nature of the building occupancy. Table 1604.5 in the IBC 

2006 Code Book defines each of the four categories in detail. 

In summary the four categories are: 

• Category I - structures that represent a low hazard to 

human life in the event of a failure. 

• Category III - structures that represent a substantial 

hazard to human life in the event of a failure. 

• Category IV - structures designated as essential 

facilities. 

• Category II - any structures not listed in I, III or IV. 

Site Classification – A, B, C, D, E or F based on the types 

of soil and their engineering properties. Table 1613.5.2 in 

the IBC 2006 Code Book defines each of the categories in 

detail. IBC specifies site class “D” when soil properties are 

unknown. 

15



Maximum Spectral Response Acceleration (Ss) – Numerical 

value found using the U.S. Geological (USGS) data 

based on the Zip Code of the project. This data point can 

be determined using the Ground Motion Parameter Calculator 

at http://www.usgs.gov/. Note the calculator assumes 

a site classification of B for the 0.2 second 

maximum Ss. The site coefficient (Fa), defined below, will 

correct for the actual site classification. 

Site Coefficient (Fa) – Values ranging from 0.8 to 2.5 determined 

based on the Ss and the Site Classification. Table 

1613.5.3(1) in the IBC 2006 Code Book defines these values. 

Design Spectral Response Acceleration (SDS) – A calculated 

value using the values for Ss and Fa. 

Seismic Load Sample Calculation 

SDS 

= 2 (Fa)(Ss) = 2 (1.0)(1.495)=0.9966 

3 3 

SDS 

= 2 (Fa)(Ss) 

3 

Amplification Factor (ap) – 2.5 for flexible components 

or flexibly attached components. Due to its low inherent 

natural frequencies, most evaporative cooling equipment 

falls under the definition of flexible. Therefore the default 

for Cooling Towers is 2.5. See Table 13.6-1 in the 

American Society of Civil Engineers (ASCE) Standard 7-05, 

to which IBC often references, for more information. 

Response Modification Factor (Rp) – 2.5 for non-isolated 

evaporative cooling equipment. 2.0 for vibration 

isolated evaporative cooling equipment. Table 13-6.1 of 

ASCE 7-05 provides additional information. 

Component Operating Weight (Wp) – This weight 

term has been removed from the equation below, because 

EVAPCO is expressing the force in terms of g’s and 

not lbs. 

Importance Factor (Ip) – 1.5 for Occupancy Category IV, 

life safety components required to function after a seismic 

event or component containing hazardous content. 

1.0 for all other components. ASCE 7-05 Section 13.1.3 

provides additional detail on importance factors. 

Installation Location (Z/h) – 0 for units installed at 

ground level. 1.0 for units installed on a rooftop. Per 

ASCE 7-05 Section 13.3, z = the height of the point of attachment 

of the component and h = the relative roof 

height. 

Seismic Design Force, (Fp) – “G-force” that the unit 

must be able to withstand. This number is calculated 

using the factors described above. The New AT is offered 

with a choice of two structural design packages, consisting 

of: 

– Standard Structural Design ≤ 1.0g 

– Upgraded Structural Design – up to 5.12g (the 

maximum value for North America) 

The following example demonstrates the procedure for 

determining which structural design package a Community 

Hospital located in Charleston, SC (zip code 29401) 

would require under the latest version of IBC. In this example, 

the cooling tower will be installed on a roof, approximately 

60 feet above grade. The unit will also be 

installed with a vibration isolation system. 

Step 1: Calculate the Design Spectral Response Acceleration 

(SDS) 

Where: 

SS = 1.495; using the USGS Ground Motion Parameter 

Calculator 

Fa = 1.0; from Table 1613.5.3(1) in the IBC 2006 Code 

Book assuming a Site Classification of D 

FP 

0.4 (aP)(SDS)(WP) 

= 1+2 z = 

h 

RP 

( IP ) 

( ) 

Step 2: Calculate the Seismic Design Force (Fp ) 

Where: 

ap = 2.5; the default for cooling towers and closed 

circuit coolers 

SDS = 0.9966; as calculated in Step 1 

Wp = 1.0; the default for cooling towers and closed 

circuit coolers 

Rp = 2.0; the default for isolated equipment 

I p = 1.5; the default for life safety components 

z/h = 1.0; the default for units on a rooftop 

In order to meet Code requirements, the unit and its anchorage 

must be constructed to withstand 2.24 g. This 

will require that the upgraded structure option be chosen 

to meet the seismic requirements of this project. Because 

the seismic load requires the upgraded structural design, 

the wind load calculation results will not change the design 

and are not required for this analysis. 

Wind Load Calculations 

0.4 (2.5)(0.9966)(1) 

2.0 

1.5 ( ) 

The data required to calculate the wind load are: 

(1+2(1))=2.24g 

16



Basic Wind Speed (V) – Numerical value, in miles per 

hour (mph) found in ASCE 7-05 Figures 6-1 (A,B,C). 

Wind Directionality Factor (Kd) – 0.85 for building 

components and cladding. Table 6-4 of ASCE 7-05 provides 

additional information. 

Occupancy Category – I, II, III or IV depending on the 

nature of the building occupancy. Table 1604.5 in the IBC 

2006 Code Book defines each of the categories in detail. 

This is the same Occupancy Category used in Seismic calculations. 

Importance Factor (I) – Numerical value between 0.77 

and 1.15 based on the Basic Wind Speed and the Occupancy 

Category. These values are found in Table 6-1 of 

ASCE 7-05. 

Exposure Category – B, C or D as defined in Section 

6.5.6.3 of ASCE 7-05. 

Component Elevation (z) – The anchorage height of 

the unit in feet. 

Nominal Height of the Atmospheric Boundary Layer 

(zg) - Numerical value based on Exposure Category. These 

values are found in Table 6-2 of ASCE 7-05. 

3 second Gust-Speed power Law Exponent (α) - Numerical 

value based on Exposure Category. These values 

are found in Table 6-2 of ASCE 7-05. 

z 

KZ = 2.01( zg) 

2 

( a ) 

Velocity Pressure Exposure Coefficient (Kz) – A calculated 

value using the values for zg and α. 

Topographic Factor (Kzt) – 1.0 default when topographic 

effects are not a factor. ASCE 7-05 Section 6.5.7 

provides additional detail on topographic factors. 

Velocity Pressure (qz) – This number in pounds per 

square foot (psf) is calculated using the factors described 

above. The New AT is offered with a choice of two structural 

design packages, consisting of: 

– Standard Structural Design - up to 60 psf 

– Upgraded Structural Design - up to 145 psf (the 

maximum value for North America) 

The following example demonstrates the procedure to 

determine which structural design package a Condominium 

Building located in Miami, FL (zip code 33101) 

would require under the latest version of IBC. In this example, 

the cooling tower will be installed on the top of 

KZ = 2.01 

( a ) 

( ) 

( 11.5) 

2 2 

z 

60 

= 

( zg) 2.01 = 

700 

1.31 

the 60 foot tall building. 

Step 1: Calculate the Exposure Category Coefficient (Kz) 

Where: 

z = 60; Installation Height 

zg = 700; from ASCE 7-05 Table 2 using an Exposure 

Category of D. 

α = 11.5; from ASCE 7-05 Table 2 using an Exposure 

qp = 0.00256(Kz)(Kzt)(Kd)(V 2 )(I) = 

0.00256(1.31)(1.0)(0.85)(145 2 )(1.0) = 59.93psf 

Category of D. 

Step 2: Calculate the Velocity Pressure (qp) 

Where: 

Kz = 1.31; as calculated above. 

Kzt = 1.0; default when topographic effects are not a 

factor. 

Kd = 0.85; default for building components and 

cladding. 

V = 145; wind speed from ASCE 7-05 Figure 6-1. 

I = 1.0; Based on an Occupancy Category of II. 

In order to meet Code requirements, the unit and its attachments 

must be designed and constructed to withstand 

59.93 psf. This means that the standard AT 

construction design will meet the wind load requirements 

of this project. Because the wind load does not require 

the upgraded structural design, the seismic load calculation 

must also be completed to determine if the results 

will change the unit design. 

Wind Load Sample Calculation 

17



Notes: 

18

UT 

† 


† Mark owned by the Cooling Technology Institute 

19


S UPER L OW S OUND FAN 

Solutions for Sound Sensitive Applications 

The ULTRA-QUIET Cooling Tower comes standard with Super Low Sound Fan that reduces the overall sound generated 

from the top of the cooling tower. The ULTRA-QUIET cooling tower provides deep sound reductions and can be used in 

combination with Water Silencers to produce the lowest sound levels commercially available. Consult EVAPCO's iES 

selection software for unit sound levels. If a detailed analysis or full octave band datasheet is required for your application, 

please consult your EVAPCO Sales Representative. 

Family of Super Low Sound Fans 

The Super Low Sound Fan 

Reduced Sound Levels versus Model AT Standard Fan 

EVAPCO's Super Low Sound Fan on the ULTRA-QUIET cooling tower utilizes an extremely wide chord blade design 

available for sound sensitive applications where the lowest sound levels are desired. The fan is one piece molded heavy 

duty FRP construction utilizing a forward swept blade design. The Super Low Sound Fan reduces sound levels 9 to 15 

dB(A) compared to the Model AT standard fan. 

10 dB(A) decrease is half as loud! The ULTRA-QUIET tower reduces noise pollution by more than 50%. 

(Refer to Sound Basics on Page 21) 

Improved Sound Quality versus 

Model AT Standard Fan 

The SUPER Low Sound Fan on the ULTRA-QUIET cooling tower 

reduces sound levels 9-15 dB(A) and eliminates audible blade 

passing frequencies indicative of straight bladed axial type fans. 

Refer to the Narrow Band Spectrum graph which shows how 

straight bladed axial fans produce blade passing frequencies – 

the same phenomena that produce the signature pulsating 

helicopter noise. 

Sound Pressure Level (dB) 

Blade Passing Frequencies 

Standard Axial Fan 

Super Low Sound Fan 

The blade passing frequencies are audible spikes in sound 

pressure levels, but are not apparent in the octave band 

sound spectrum. 

Frequency (Hz) 

Narrow Band Spectrum Analysis 

The Super Low Sound Fan on the ULTRA-QUIET Cooling Tower reduces sound levels and betters the sound quality! 

20


S OUND B ASICS 

Background in Sound Basics 

Sound 

Sound is the alteration in pressure, stress, particle displacement 

and particle velocity, which is propagated in an elastic 

material. Audible sound is the sensation produced at the ear 

by very small pressure fluctuations in the air. 

Sound Pressure 

Sound pressure is the intensity of sound. Sound pressure, Lp 

in decibels is the ratio of measured pressure, P in the air to a 

reference sound pressure, PO =2x10 –5 Pascal following the 

following formula: 

Lp (dB) = 10 log10 ( P 2 / PO 2 ) 

The most important point to understand about sound 

pressure level is that sound pressure level is what is 

actually being measured when sound data is 

recorded. Microphones that measure sound are pressure 

sensitive devices that are calibrated to convert the sound 

pressure waves into decibels. 

25 

Ft. Candles 

50 

Ft. Candles 

100 

Ft. Candles 

100 ft. 50 ft. 25 ft. 

25 ft. 50 ft. 100 ft. 

0 

“SOUND PRESSURE” 

Similar to the intensity coming from a light bulb 

which gets dimmer as one gets further and further 

away, sound pressure decreases in decibels as your 

ear gets further from the sound source. 

Sound Power 

Sound Power is the energy of sound. Sound power, Lw in 

decibels is the ratio of the calculated sound power, W to 

a reference power, Wo =1 picowatt, according to the 

following formula: 

Lw (dB) = 10 log10 (W/Wo) 

The most important point to remember about sound 

power level is that sound power level is not a measured 

value, but is calculated based on the measured 

sound pressure. 

Adding Multiple Sound Sources 

Since the decibel is a logarithmic function, the numbers are 

not added linearly. Therefore, two 73 dB sound sources 

added together do not equal 146 dB. The resultant sound 

would actually be 76 dB. The following table shows how to 

add decibels from two sound sources. 

100W 

“SOUND POWER” 

Similar to the wattage of a light bulb that does not 

change the farther one is away from the light bulb, 

sound power does not vary with distance. 

76 dB(A) 

73 dB(A) 73 dB(A) 

Difference in Add to the higher 

dB Level 

dB Level 

0 to 1 3 

2 to 3 2 

4 to 8 1 

9 or greater 0 

21


S OUND B ASICS 

Sound Science and Cooling Towers 

Fan Noise 

Low-Mid Frequencies 

Travel through and 

around Obstructions 

Sound Frequency 

Fan Noise 

• Low / Mid frequencies that travel long distances, 

through walls, and around obstructions. 

• Very difficult to attenuate. Reduce fan noise by using 

Low Sound Fans. 

• Dominates what is measured and heard at the 

cooling tower and at the sound sensitive location. 

Water 

Noise 

High Frequency 

Self Attenuating 

Water Noise 

• High frequencies that attenuate naturally with 

distance. Attenuated easily by walls, trees or 

other obstructions. 

• Totally masked and drowned out by fan noise at a 

short distance away from the cooling tower. 

Sound Pressure – The A-Weighted Scale 

The A-weighted scale, dB(A) is a means to translate what a sound meter microphone 

measures to how the human ear perceives the sound. 

dB(A) Formula and Conversions: 

where: 

let: 

f=8000 

dB(A) =10 log 10 10 

f=63 

Cf = correction factor per band 

dB = measured sound pressure 

Zf = (dB + Cf)/10 

((dB+Cf) /10) 

Band Center Frequency Sample Cf Zf 

Freq. (Hz) Range (Hz) Data (dB) (dB) 

1 63 44-88 68 -26.2 4.18 

2 125 89-175 76 -16.1 5.99 

3 250 176-350 77 -8.6 6.84 

4 500 351-700 73 -3.2 6.98 

5 1000 701-1400 70 0 7.00 

6 2000 1401-2800 68 +1.2 6.92 

7 4000 2801-5600 71 +1.0 7.20 

8 8000 5601-11200 73 -1.1 7.19 

Typical Sound Pressure Levels of 

Well Known Noises: 

Jet Airplane, 150 feet away 

Painful 

Very Uncomfortable 

Circular Saw 

Nightclub 

Semi Truck 

Sidewalk of a Busy Road 

Household Vacuum, 3 feet away 

Normal Conversation 

Inside Average Home 

Quiet Library 

Bedroom at Night 

140 dB(A) 

130 dB(A) 

120 dB(A) 

110 dB(A) 

100 dB(A) 

90 dB(A) 

80 dB(A) 

70 dB(A) 

60 dB(A) 

50 dB(A) 

40 dB(A) 

30 dB(A) 

Notable Facts about Sound: 

• +/- 1 dB(A) is inaudible to the human ear 

• Decreasing a noise source by 10 dB(A) sounds half as 

loud to the human ear 

Example calculation of the dB(A) formula using the Sample Data above. 

dB(A) = 10 log 10 10 (Z1) + 10 (Z2) + 10 (Z3) + 10 (Z4) + 10 (Z5) + 10 (Z6) + 10 (Z7) + 10 (Z8) 

= 10 log10 (67114245.2) = 78.3 dB(A) 

22


S PECIFYING S OUND 

Specifying Sound – A Performance Specification 

Specify sound pressure in dB(A) measured 5 feet above the fan 

discharge during full speed operation. 

• All manufacturers can meet a performance specification with Low Sound Options 

• Fan noise is what matters. 5 feet above the fan is where it matters. 

Measurement Location 

Per Cooling Technology Institute Standard ATC-128 

Sound Microphone location 5 feet above the cooling tower fan cowl edge at a 

45° angle. 

This position assures accurate sound measurements by eliminating a source of 

uncertainty by taking the microphone out of the high velocity fan discharge air. 

Microphone 

Location 

5‘ 

45° 

Easy Verification 

At 5 feet from the cooling tower, a sound meter records only cooling tower noise. Interested parties can easily verify the 

actual noise coming from the cooling tower against the specified sound data with good certainty. 

New 

Cooling 

Tower 

50 Feet 50 50 Feet 

Feet 

Microphone 

50 Feet Feet 

50 50 Feet Feet Feet 

Rooftop 

Air 

Handler 

If sound were specified at 50 feet or some greater distance from the 

sound sensitive location, there is increased uncertainty in the measured 

data due to other possible sound sources within the 50 foot radius of the 

sound microphone. 

Sound Quality 

Sound coming from the top of the cooling tower is comprised of lowand 

mid-frequency fan noise. Low- and mid-frequency fan “rumble” is 

very difficult to attenuate. Fan rumble travels through everything and 

around everything and what is audible at any sound sensitive location. 

Existing 

Cooling 

Tower 

Road 

Traffic 

Sound coming from the sides of the cooling tower is comprised of high 

frequency water noise, which is much less objectionable than fan noise 

and attenuates naturally with distance. 

Acoustical Shadow* 

“Subjective reactions to the overall noise generated by cooling 

towers indicate that as one walks away from a tower intake, a 

point is reached where the water noise is masked by the fan noise. 

The point coincides with the point at which one emerges from the 

acoustical shadow of the tower structure, which shields intake 

water noise from discharge fan noise.” 

*Seelbach & Oran, “What To Do About Cooling Tower Noise”, 

Industrial Acoustics Company. 

Sound measured at the side of a cooling tower is inside the 

acoustical shadow of the noise emitted from the top. Outside 

the acoustical shadow, the low- and mid-frequency fan noise 

completely masks the high frequency water noise. 

Fan Noise 

Water 

Noise 

Low-Mid Frequencies 

Travel through and 

around Obstructions 

Acoustical 

Shadow 

High Frequency 

Self Attenuating 

Specify fan noise because it matters! Specify fan noise where it matters! 

23


Notes: 

24

USS 

† 

MADE IN USA 

25


A 100% CORROSION-RESISTANT DESIGN 

EVAPCO, Inc., continues to set the standard in the cooling tower 

industry with the Ultra-SST. The Ultra-SST is the finest factory 

assembled cooling tower ever offered. It is the ONLY ALL Stainless 

Steel cooling tower offered with a Type 316 SS basin AS 

STANDARD! Constructed of the highest quality materials, the 

Ultra-SST provides the Ultimate in corrosion protection. 

The Ultra-SST is a 100% corrosion-resistant cooling 

tower constructed of stainless steel. The premium 

components include: 

Smooth Flow Fan 

• Soft-connect blade to hub design. 

• VFD-friendly. 

• Eliminates critical blade passing 

frequencies at any speed. 

Type 304 Stainless Steel 

• Upper casing and structure 

• Mechanical equipment support 

• Fan Cowl and Fan Guard 

PVC 

• Patented EVAPAK ® Fill 

• Water distribution system 

• Air inlet louvers 

• Drift eliminators 

Type 316 Stainless Steel 

• Cold water basin 

• Vertical support columns 

• Air inlet louver frames 

EVAPCO offers the Ultra-SST cooling tower with a standard Type 316 stainless 

steel cold water basin. Since the cold water basin provides the structural support 

for the unit and is the area most susceptible to corrosion, it is constructed with 

the highest quality materials. The Ultra-SST is the ONLY cooling tower in the 

industry that offers this protection as standard. 

The chemical compositions of Type 304 and 316 stainless steel are similar. 

However, there are several differences in their makeup that allow Type 316 SS to 

have better corrosion resistance than Type 304 SS. Type 316 SS contains 

molybdenum (304 SS does not) and has a greater percentage of nickel than Type 

304 SS. The molybdenum–bearing Type 316 SS provides superior corrosion 

resistance to a wide variety of environments. Also, resistance of stainless steels to 

pitting and/or crevice corrosion in the presence of chloride or other halide ions is 

enhanced by molybdenum content. A measure of pitting resistance is expressed 

by the PREN (Pitting Resistance Equivalent, including Nitrogen) calculation. The 

Type 316 SS PREN of 24 is considerably higher than the Type 304 SS PREN of 19, 

reflecting the better pitting resistance provided by Type 316 SS due to its 

molybdenum content. 

It is generally accepted that Mo-bearing Type 316 SS material can accommodate 

water with chloride content ten times greater than Type 304 SS. Furthermore, 

Type 316 SS eliminates the aesthetic degradation associated with staining of Type 

304 SS. Don’t settle for lesser Series 300 stainless steel! Type 316 SS material 

offers the best protection against corrosion. 

Once again, EVAPCO raises the quality standard in the cooling tower industry 

with the Ultra-SST! 

Complete 316 SS Construction Available 

For a small price addition, the Ultra-SST can be upgraded to 

complete Type 316 SS construction. 

Certified-Standard 201 

• Independent Certification. 

• No costly field performance 

tests required. 

26


COMPLETE STAINLESS STEEL CONSTRUCTION 

Available in 55 Cross Sections and a capacity range of 32 to 4120 Nominal 

Tons (139 to 18,114kW)! The Ultra-SST has a model for every application. 

Optional Motor Davit and Working Platform 

Motor Davit 

• Motor davit and bracket option for easy motor removal. 

• Also available for Gearbox removal. 

Platform 

• Platform and ladder arrangement available as an option. 

• Provides additional working surface for the service mechanic. 

Consult the iES Equipment 

Selection Program for Selections 

and Technical Assistance including 

Applications, Layout, and 

Structural Steel Support. 

If there is an application for which 

the standard catalog product line 

does not work, EVAPCO will make 

a cooling tower that will fit your 

requirement! 

304 SS Casing 

EVAPCO unequivocally 

guarantees the thermal 

performance of the 

Ultra-SST cooling tower 

product line. 

NEW! EvapJet Nozzle 

Water Distribution System 

316 SS Basin 

• Non-corrosive PVC construction with new EvapJet 

nozzles. 

• Large 1” wide orifice nozzles prevent clogging and are 

threaded for easy removal and positive positioning. 

• 66% fewer nozzles! 

• System branches have threaded end caps to assist 

with debris removal. 

EXCLUSIVE 

Exclusive 5 Year Complete Product Warranty 

• Covers the complete drive system, including the motor, 

on belt or gear drive units. 

• Covers the complete cooling tower from the cold water 

basin to the fan discharge screen. 

• Standard on all Ultra-SST Models. 

27 

Quick Release Louver Fasteners 

• New design allows quick removal of louvers. 

• Louver fastener is large and easy to release. 

• Louver fastener remains on the unit–eliminating 

the possibility of missing hardware.


M ECHANICAL 

S PECIFICATIONS 

SECTION 23 65 00 – FACTORY-FABRICATED COOLING TOWERS 

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, open 

circuit, induced draft counterflow cooling tower. 

1.3 SUBMITTALS 

A. General. Submit the following: 

1. Certified drawings of the cooling tower, 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 cooling tower thermal performance according 

to CTI Standard 201. 

2.Test and certify cooling tower 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 (AT & UT): One (1) year from start-up, not to exceed 

eighteen (18) months from shipment on the unit. 

C. Unit (USS): Five (5) year comprehensive warranty against 

materials and workmanship for complete unit. 

PART 2 - PRODUCTS 

2.1 MANUFACTURERS 

A. Manufactures: Subject to compliance with requirements, 

provide cooling towers 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 INDUCED-DRAFT, COUNTERFLOW COOLING TOWERS 

A. Description: Factory assembled and tested, induced draft 

counterflow cooling tower complete with fill, fan, louvers, 

accessories, and rigging supports. 

B. Cooling Tower Characteristics and Capacities: Refer to the 

Cooling Tower schedule. 

C. Fan(s): 

1. Type and Material (AT & USS): Axial propeller, individually 

adjustable wide chord blade extruded aluminum 

installed in a closely fitted cowl with venturi air inlet for 

maximum efficiency, covered with a heavy gauge hot 

dipped Galvanized (AT) or Stainless Steel (USS) fan 

guard. 

2. Type and Material(UT): Axial propeller, one piece heavy 

duty FRP hub and blade construction. Galvanized steel 

closely fitted fan cowl with venturi air inlet for maximum 

fan efficiency, covered with a heavy gauge hot dip galvanized 

steel fan guard. (Optional Type 304 stainless steel) 

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 of water over fill material with pressurized 

spray tree. 

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

b. Nozzles: Non-clogging, ABS Plastic, threaded into 

branch piping. 

2. Maximum pressure at inlet shall be ____ psig. 

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 or wind loads up to 

__ psf. 

F. Collection Basin Material: Galvanized Steel (AT/UT – Type 

304 Stainless Steel Optional) or Type 316 Stainless Steel 

(USS): 

1. Removable stainless-steel strainer with openings 

smaller than nozzle orifices. 

2. Joints: Bolted and sealed watertight or welded. 

3. Overflow, makeup and side drain connections 

4. Flume plate between cells (for multiple-cell units) or 

Equalizer connection (for multiple-cooling-tower system). 

G. Casing: Galvanized Steel (AT/UT) or Type 304 Stainless 

Steel (USS – Type 316 Stainless Steel Optional): 

1. Casing panels shall totally encase the fill media to 

protect the fill from damage due to direct atmospheric 

contact. 

2. Fasteners: Corrosion resistance equal to or better than 

materials being fastened. 

3. Joints: Sealed watertight. 

4. Welded Connections: Continuous and watertight 

H. Fill Media: PVC; resistant to rot, decay and biological attack; 

formed, crossfluted bonded together for strength 

and durability in block format for easy removal and replacement; 

suitable for use as a working surface; self extinguishing 

with flame spread rating of 5 per ASTM E84-81a; 

able to withstand continuous operating temperature of 

130ºF; and fabricated, formed and installed by the manufacturer 

to ensure water breaks up into droplets. 

I. Drift Eliminators: Same material as Fill. 0.001% drift rate. 

J. Air Inlet Louver Screens: Formed PVC mounted in G-235 

galvanized (or Type 316 stainless) steel frames for easy removal; 

designed “Sight Tight” to completely block direct 

sunlight from entering and water from splashing out of 

the cooling tower. 

K. Water Level Control: Brass mechanical makeup water 

valve and plastic float with an adjustable linkage. 

2.4 MOTORS AND DRIVES 

A. General requirements for motors are specified in Division 

15 Section “Motors”. 

B. Enclosure Type: TEAO or TEFC 

C. Motor Speed: Single Speed (Option: VFD Duty, 2-speed) 

D. Direct Drive (AT/USS 14-64 through 14-912 ONLY): The fan 

drive shall be mounted on the motor in a direct drive 

configuration. 

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

nameplate HP. 

1. Belt: Mutli-groove, solid back V-belt type neoprene reinforced 

with polyester cord. 

2. Sheaves: Aluminum alloy if located inside the 

airstream. 

3. Bearings: Heavy duty, self-aligning pillow block bearings 

with lubrication lines extended to side access door. 

Minimum L10 life for bearings shall be 75,000 hours. Provide 

extended grease lines and fittings. 

4. Vibration Cutout Switch: Mechanical switch to de- energize 

fan motors if excessive vibration in NEMA 4 enclosure. 

2.5 MAINTENANCE ACCESS 

A. Internal Working / Service Platforms: Provide a complete 

internal working platform and ladder system for service 

of all drive components. A suitable working platform 

may be constructed of the fill media for counterflow 

cooling towers. If a crossflow tower is used, provide an 

internal walkway with ladder and elevated working platform 

to allow for service and maintenance to motor and 

drive assembly. 

B. Handrails/Grabrails: Galvanized steel pipe complying with 

29 CFR 1910.23. If access to fan deck is required, supply a 

perimeter handrail with ladder from grade to fan deck. 

C. Ladders: Aluminum, sloped “ships type” with grabrail or 

vertical complying with 29 CFR 1910.27. 

28

29 

ENGINEERING 

DATA

THERMAL PERFORMANCE 

MODELS: AT/USS 14-64 to 14-96 

† 

Thermal performance certified by the Cooling Technology 

Institute (CTI) in accordance with CTI Standard STD-201 

TOWER CAPABILITY IN USGPM AT THE FOLLOWING TEMPERATURE CONDITIONS (°F) 

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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 14-64 2 131 101 121 92 106 81 91 70 122 94 

AT 14-74 2 145 114 134 105 119 94 104 83 136 107 

AT 14-84 3 154 120 142 110 125 98 108 85 144 112 

AT 14-94 3 167 133 155 123 139 111 122 99 157 126 

AT 14-66 3 226 175 208 160 183 142 158 124 211 164 

AT 14-76 3 245 195 228 181 204 162 179 144 230 184 

AT 14-86 5 264 208 244 191 217 171 189 151 247 195 

AT 14-96 5 282 227 263 211 236 191 208 171 266 215 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 14-64 2 115 89 98 122 76 95 78 103 61 81 

AT 14-74 2 128 102 111 135 89 108 90 117 74 94 

AT 14-84 3 135 106 116 143 92 113 94 123 75 97 

AT 14-94 3 148 119 130 156 105 126 107 136 88 111 

AT 14-66 3 198 155 170 210 134 165 137 179 109 142 

AT 14-76 3 218 175 191 230 154 185 157 200 129 162 

AT 14-86 5 233 185 202 246 162 196 165 213 134 171 

AT 14-96 5 252 205 222 265 181 216 184 232 153 190 

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 iES Selection Program or local EVAPCO representative. 

30 


ENGINEERING DATA & DIMENSIONS 


One-Cell Cooling Towers 

ACCESS 

DOOR 

F 

4" MPT 

INLET 

ACCESS 

DOOR 

T 

24 1/8 

H 

1" 

MAKE-UP 

4" MPT 

OUTLET 

2" 

OVERFLOW 

19 3/4 

B 

P 

2" DRAIN 

24 1/8 

38 1/8 

48 1/4 L 

✦ 

3 

L = Lower Section 

U = Upper Section 

Weights (LBS) 

Dimensions 

Fan Air 

Model Heaviest Motor Flow 

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

AT 14-64 1080 1760 L 560 2 9,583 101-5/8" 32-3/8" 5' 9-1/4" 6' 3" 3' 11-3/4" 12-7/8" 

AT 14-74 1160 1840 L 640 2 9,419 113-5/8" 32-3/8" 6' 9-1/4" 7' 3" 3' 11-3/4" 12-7/8" 

AT 14-84 1130 1810 U 570 3 10,886 101-5/8" 32-3/8" 5' 9-1/4" 6' 3" 3' 11-3/4" 12-7/8" 

AT 14-94 1210 1890 L 640 3 10,682 113-5/8" 32-3/8" 6' 9-1/4" 7' 3" 3' 11-3/4" 12-7/8" 

AT 14-66 1390 2460 L 730 3 15,295 101-5/8" 32-3/8" 5' 9-1/4" 6' 3" 5' 11-3/4" 12-7/8" 

AT 14-76 1490 2560 L 830 3 15,013 113-5/8" 32-3/8" 6' 9-1/4" 7' 3" 5' 11-3/4" 12-7/8" 

AT 14-86 1410 2480 L 730 5 17,978 101-5/8" 32-3/8" 5' 9-1/4" 6' 3" 5' 11-3/4" 12-7/8" 

AT 14-96 1510 2580 L 830 5 17,647 113-5/8" 32-3/8" 6' 9-1/4" 7' 3" 5' 11-3/4" 12-7/8" 

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 are 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. 

† Height includes fan guard which ships factory mounted. 

✦ Outlet connection extends 3” beyond bottom flange. 

31



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 14-69 (2) 2 304 233 279 213 245 187 210 163 283 218 

AT 14-79 (2) 2 335 264 310 243 276 217 240 192 314 249 

AT 14-89 (2) 3 356 277 329 254 290 226 251 198 333 260 

AT 14-99 (2) 3 386 308 359 285 321 257 282 228 362 291 

AT 14-612 (2) 3 459 356 423 326 373 289 322 253 429 333 

AT 14-712 (2) 3 499 397 464 367 414 330 363 293 469 375 

AT 14-812 (2) 5 536 422 497 389 442 347 384 307 503 397 

AT 14-912 (2) 5 574 461 535 429 481 388 424 347 540 437 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 14-69 (2) 2 265 205 227 282 176 219 180 239 141 187 

AT 14-79 (2) 2 296 235 258 313 206 250 209 270 170 217 

AT 14-89 (2) 3 313 245 269 332 213 261 217 284 174 226 

AT 14-99 (2) 3 343 276 300 362 244 292 248 315 204 256 

AT 14-612 (2) 3 403 315 346 427 272 335 278 364 222 288 

AT 14-712 (2) 3 444 356 388 468 313 377 319 406 262 330 

AT 14-812 (2) 5 475 376 412 501 329 399 335 433 272 347 

AT 14-912 (2) 5 513 416 451 539 369 439 375 471 312 387 





32 





ACCESS 

DOOR 

ACCESS 

DOOR 

F 

ACCESS 

DOOR 

MPT INLET* 

ACCESS 

DOOR 

T 

24 1/8 

H 

1" 

MAKE-UP 

2" 

OVERFLOW 

B 

P 

MPT OUTLET* 

19 3/4 

12 7/8 

2" DRAIN 

24 1/8 

38 1/8 

48 1/4 

3 

5 

4 1/4 

✦ 

3 

L 



Weights (LBS) Dimensions Connections 

Fan Air 

AT/USS 

Model Heaviest Motor Flow Water Water 

No. Shipping Operating Section (HP) (CFM) H T B P L F† Inlet Outlet 

AT 14-69 2000 3600 L 1010 (2) 2 21,130 101-5/8" 32-3/8" 5' 9-1/4" 6' 3" 8' 11-3/4" 12-7/8" 4" 4" 

AT 14-79 2160 3760 L 1170 (2) 2 20,767 113-5/8" 32-3/8" 6' 9-1/4" 7' 3" 8' 11-3/4" 12-7/8" 4" 4" 

AT 14-89 2100 3700 U 1090 (2) 3 24,003 101-5/8" 32-3/8" 5' 9-1/4" 6' 3" 8' 11-3/4" 12-7/8" 4" 4" 

AT 14-99 2260 3860 L 1170 (2) 3 23,552 113-5/8" 32-3/8" 6' 9-1/4" 7' 3" 8' 11-3/4" 12-7/8" 4" 4" 

AT 14-612 2530 4700 U 1270 (2) 3 30,937 101-5/8" 32-3/8" 5' 9-1/4" 6' 3" 11' 11-3/4" 12-7/8" 6" 6" 

AT 14-712 2730 4900 L 1460 (2) 3 30,366 113-5/8" 32-3/8" 6' 9-1/4" 7' 3" 11' 11-3/4" 12-7/8" 6" 6" 

AT 14-812 2570 4740 U 1310 (2) 5 36,364 101-5/8" 32-3/8" 5' 9-1/4" 6' 3" 11' 11-3/4" 12-7/8" 6" 6" 

AT 14-912 2770 4940 L 1460 (2) 5 35,694 113-5/8" 32-3/8" 6' 9-1/4" 7' 3" 11' 11-3/4" 12-7/8" 6" 6" 






✦ Outlet connection extends 3” beyond bottom flange. 

33


MODELS: AT/UT/USS 19-56 to 19-98 

† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 19-56 5 424 324 389 295 340 259 291 223 394 302 

AT 19-66 7.5 491 380 452 347 398 308 343 269 458 356 

AT 19-76 7.5 534 425 496 393 443 352 388 312 502 401 

AT 19-86 10 578 462 538 428 482 386 424 344 543 437 

AT 19-96 15 650 525 606 490 546 447 485 404 612 499 

AT 19-28 5 551 422 506 385 443 339 379 294 512 394 

AT 19-38 7.5 594 457 546 419 480 370 413 322 553 428 

AT 19-48 10 634 491 585 450 515 400 444 350 592 461 

AT 19-58 7.5 642 508 596 469 531 421 464 371 602 479 

AT 19-68 10 690 549 641 508 573 457 503 406 648 519 

AT 19-78 10 709 572 661 533 595 485 528 438 668 543 

AT 19-88 15 752 603 700 560 628 505 553 451 708 571 

AT 19-98 15 784 633 731 591 658 539 585 487 739 602 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 19-56 5 369 284 314 393 243 304 248 332 194 258 

AT 19-66 7.5 430 336 369 456 290 358 296 389 237 307 

AT 19-76 7.5 475 381 414 500 335 403 341 434 279 352 

AT 19-86 10 515 415 451 542 367 439 374 473 308 386 

AT 19-96 15 581 477 514 611 427 501 434 536 369 446 

AT 19-28 5 480 371 410 511 318 397 325 433 254 338 

AT 19-38 7.5 519 403 445 551 348 431 356 469 281 369 

AT 19-48 10 556 435 478 590 377 463 384 503 308 399 

AT 19-58 7.5 569 454 496 601 398 482 406 520 330 420 

AT 19-68 10 614 493 537 647 434 522 442 562 362 457 

AT 19-78 10 634 518 560 666 464 545 471 584 397 485 

AT 19-88 15 671 543 590 706 481 574 489 616 405 504 

AT 19-98 15 701 575 620 737 515 605 523 646 444 538 





34 





30 5/8 

Swing Out Radius of Motor Cover 

ACCESS DOOR 

21 3/8 

F 

2 

T 

50 3/4 

ACCESS 

DOOR 

6 BFW/GVD 

INLET 

H 

P 

B 

2 MPT 

MAKE-UP 

6 BFW/GVD 

OUTLET 

23 1/8 

14 7/8 

6 1/2 

3 7/8 

5 3/8 

9 

3 FPT 

OVERFLOW 

3 FPT 

DRAIN 

50 3/4 

L 

3/8 

✦ 

8' 5-1/2" 



Weights (LBS) 

Dimensions 

Fan Air 


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

AT 19-56 3060 5100 U 2010 5 26,500 9' 7-3/8" 5' 7-1/8" 4' 1/4" 7' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 19-66 3100 5140 U 2050 7.5 30,200 9' 7-3/8" 5' 7-1/8" 4' 1/4" 7' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 19-76 3300 5340 U 2250 7.5 29,700 10' 7-3/8" 6' 7-1/8" 4' 1/4" 8' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 19-86 3330 5370 U 2280 10 32,500 10' 7-3/8" 6' 7-1/8" 4' 1/4" 8' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 19-96 3620 5660 U 2570 15 36,300 11' 7-3/8" 7' 7-1/8" 4' 1/4" 9' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 19-28 3450 5870 U 2280 5 31,300 9' 7-3/8" 5' 7-1/8" 4' 1/4" 7' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 5-7/8" 

AT 19-38 3490 5910 U 2320 7.5 35,700 9' 7-3/8" 5' 7-1/8" 4' 1/4" 7' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 5-7/8" 

AT 19-48 3520 5940 U 2350 10 39,200 9' 7-3/8" 5' 7-1/8" 4' 1/4" 7' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 5-7/8" 

AT 19-58 3720 6140 U 2550 7.5 35,100 10' 7-3/8" 6' 7-1/8" 4' 1/4" 8' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 5-7/8" 

AT 19-68 3750 6170 U 2580 10 37,800 10' 7-3/8" 6' 7-1/8" 4' 1/4" 8' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 5-7/8" 

AT 19-78 4020 6440 U 2850 10 37,800 11' 7-3/8" 7' 7-1/8" 4' 1/4" 9' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 5-7/8" 

AT 19-88 3810 6230 U 2640 15 43,700 10' 7-3/8" 6' 7-1/8" 4' 1/4" 8' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 5-7/8" 

AT 19-98 4080 6500 U 2910 15 43,000 11' 7-3/8" 7' 7-1/8" 4' 1/4" 9' 2-1/2" 5' 11-7/8" 1' 7/8" 2' 5-7/8" 

AT/USS 

F† 

UT 






✦ Outlet connection extends 3/8” beyond bottom flange. 

35



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 26-517 (2) 5 904 693 830 633 728 559 624 485 841 649 

AT 26-617 (2) 7.5 985 762 907 698 799 618 689 540 919 714 

AT 26-717 (2) 7.5 1072 853 996 788 890 708 779 627 1007 805 

AT 26-817 (2) 10 1160 928 1080 860 968 776 851 691 1091 878 

AT 26-917 (2) 15 1305 1054 1216 984 1096 897 974 812 1229 1002 

AT 28-217 (2) 5 1103 845 1013 770 888 678 759 588 1026 789 

AT 28-317 (2) 7.5 1189 915 1093 838 961 740 827 644 1107 858 

AT 28-417 (2) 10 1269 983 1170 901 1031 800 890 700 1185 923 

AT 28-517 (2) 7.5 1285 1017 1193 940 1063 842 928 743 1206 960 

AT 28-617 (2) 10 1381 1100 1284 1018 1148 915 1006 813 1298 1039 

AT 28-717 (2) 10 1419 1145 1323 1067 1191 972 1056 876 1336 1087 

AT 28-817 (2) 15 1505 1208 1402 1120 1258 1011 1108 902 1417 1143 

AT 28-917 (2) 15 1570 1268 1464 1183 1318 1078 1171 976 1479 1205 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 26-517 (2) 5 788 610 674 838 524 653 536 711 421 558 

AT 26-617 (2) 7.5 863 674 741 916 583 718 594 781 475 617 

AT 26-717 (2) 7.5 953 764 832 1005 672 809 684 872 559 707 

AT 26-817 (2) 10 1034 834 906 1089 737 882 750 949 618 774 

AT 26-917 (2) 15 1167 957 1032 1226 858 1006 871 1075 741 896 

AT 28-217 (2) 5 962 742 821 1023 636 794 650 867 509 677 

AT 28-317 (2) 7.5 1039 808 890 1103 697 862 713 939 563 739 

AT 28-417 (2) 10 1113 870 958 1182 754 928 769 1008 616 799 

AT 28-517 (2) 7.5 1139 909 992 1203 797 965 812 1041 661 841 

AT 28-617 (2) 10 1228 987 1074 1295 869 1044 884 1125 726 914 

AT 28-717 (2) 10 1268 1038 1120 1333 929 1092 943 1169 795 971 

AT 28-817 (2) 15 1343 1087 1180 1414 963 1148 979 1234 810 1010 

AT 28-917 (2) 15 1404 1151 1241 1475 1032 1210 1047 1294 888 1077 





36 




Two-Cell Cooling Towers 


30 5/8 30 5/8 

ACCESS DOOR 

ACCESS DOOR 

21 3/8 

F 

T 

2 50 3/4 

ACCESS 

DOOR 

ACCESS 

DOOR 

(2) 6 BFW/GVD 

INLET 

H 

P 

B 

23 1/8 

14 7/8 

6 1/2 

3 7/8 

50 3/4 

92 1/2 

5 3/8 

(2) 3 FPT 

OVERFLOW 

(2) 3 FPT 

DRAIN 

(2) 2 MPT 

MAKE-UP 

(2) 6 BFW/GVD 

OUTLET 

W 3/8 

✦ 

101 1/2 2 1/2 

17'-1 1/2" 



Weights (LBS) 

Dimensions 

Fan Air 


No. Shipping Operating Section (HP) (CFM) H T B P W 

AT 26-517 6120 10200 U 2010 (2) 5 53,100 9' 11" 5' 7-1/8" 4' 3-7/8" 7' 6-1/8" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 26-617 6200 10280 U 2050 (2) 7.5 60,500 9' 11" 5' 7-1/8" 4' 3-7/8" 7' 6-1/8" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 26-717 6600 10680 U 2250 (2) 7.5 59,400 10' 11" 6' 7-1/8" 4' 3-7/8" 8' 6-1/8" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 26-817 6660 10740 U 2280 (2) 10 65,100 10' 11" 6' 7-1/8" 4' 3-7/8" 8' 6-1/8" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 26-917 7240 11320 U 2570 (2) 15 72,800 11' 11" 7' 7-1/8" 4' 3-7/8" 9' 6-1/8" 5' 11-7/8" 1' 7/8" 2' 1-7/8" 

AT 28-217 6900 11740 U 2280 (2) 5 62,600 10' 3-3/8" 5' 7-1/8" 4' 8-1/4" 7' 10-1/2" 8' 5-7/8" 1' 7/8" 2' 5-7/8" 

AT 28-317 6980 11820 U 2320 (2) 7.5 71,400 10' 3-3/8" 5' 7-1/8" 4' 8-1/4" 7' 10-1/2" 8' 5-7/8" 1' 7/8" 2' 5-7/8" 

AT 28-417 7040 11880 U 2350 (2) 10 78,300 10' 3-3/8" 5' 7-1/8" 4' 8-1/4" 7' 10-1/2" 8' 5-7/8" 1' 7/8" 2' 5-7/8" 

AT 28-517 7440 12280 U 2550 (2) 7.5 70,200 11' 3-3/8" 6' 7-1/8" 4' 8-1/4" 8' 10-1/2" 8' 5-7/8" 1' 7/8" 2' 5-7/8" 

AT 28-617 7500 12340 U 2580 (2) 10 76,900 11' 3-3/8" 6' 7-1/8" 4' 8-1/4" 8' 10-1/2" 8' 5-7/8" 1' 7/8" 2' 5-7/8" 

AT 28-717 8040 12880 U 2850 (2) 10 75,700 12' 3-3/8" 7' 7-1/8" 4' 8-1/4" 9' 10-1/2" 8' 5-7/8" 1' 7/8" 2' 5-7/8" 

AT 28-817 7620 12460 U 2640 (2) 15 87,500 11' 3-3/8" 6' 7-1/8" 4' 8-1/4" 8' 10-1/2" 8' 5-7/8" 1' 7/8" 2' 5-7/8" 

AT 28-917 8160 13000 U 2910 (2) 15 86,000 12' 3-3/8" 7' 7-1/8" 4' 8-1/4" 9' 10-1/2" 8' 5-7/8" 1' 7/8" 2' 5-7/8" 

AT/USS 

F† 

UT 





(5) These models are available as (2) independent operating cells with the addition of a flume plate. Consult the factory for details. 



37



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 212-59 (2) 5 904 693 830 633 728 559 624 485 841 649 

AT 212-69 (2) 7.5 985 762 907 698 799 618 689 540 919 714 

AT 212-79 (2) 7.5 1072 853 996 788 890 708 779 627 1007 805 

AT 212-89 (2) 10 1160 928 1080 860 968 776 851 691 1091 878 

AT 212-99 (2) 15 1305 1054 1216 984 1096 897 974 812 1229 1002 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 212-59 (2) 5 788 610 674 838 524 653 536 711 421 558 

AT 212-69 (2) 7.5 863 674 741 916 583 718 594 781 475 617 

AT 212-79 (2) 7.5 953 764 832 1005 672 809 684 872 559 707 

AT 212-89 (2) 10 1034 834 906 1089 737 882 750 949 618 774 

AT 212-99 (2) 15 1167 957 1032 1226 858 1006 871 1075 741 896 





38 





ACCESS DOOR 

30 5/8 


30 5/8 

ACCESS DOOR 

21 3/8 

21 3/8 

F 

(2) 6 BFW/GVD 

INLET 

ACCESS 

DOOR 

ACCESS 

DOOR 

66 1/4 

T 

2 

H 

P 

B 

(2) 3 FPT 

OVERFLOW 

(2) 2 MPT 

MAKE-UP 

(2) 3 FPT 

DRAIN 

5 1/8 

(2) 6 BFW/GVD 

OUTLET 

50 5/8 23 1/8 

62 7/8 

14 7/8 

66 1/2 

6 1/2 

67 5/8 

71 7/8 

3 5/8 

L ✦ 3/8 

8' 5-1/2" 



Weights (LBS) 

Dimensions 

Fan Air 


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

AT 212-59 6120 10200 U 2010 (2) 5 53,100 10' 3-3/8" 5' 7-1/8" 4' 8-1/4" 7' 10-1/2" 1' 7/8" 2' 1-7/8" 

AT 212-69 6200 10280 U 2050 (2) 7.5 60,500 10' 3-3/8" 5' 7-1/8" 4' 8-1/4" 7' 10-1/2" 1' 7/8" 2' 1-7/8" 

AT 212-79 6600 10680 U 2250 (2) 7.5 59,400 11' 3-3/8" 6' 7-1/8" 4' 8-1/4" 8' 10-1/2" 1' 7/8" 2' 1-7/8" 

AT 212-89 6660 10740 U 2280 (2) 10 65,100 11' 3-3/8" 6' 7-1/8" 4' 8-1/4" 8' 10-1/2" 1' 7/8" 2' 1-7/8" 

AT 212-99 7240 11320 U 2570 (2) 15 72,800 12' 3-3/8" 7' 7-1/8" 4' 8-1/4" 9' 10-1/2" 1' 7/8" 2' 1-7/8" 

AT/USS 

F† 

UT 





(5) These models are available as (2) independent operating cells with the addition of a water tight basin partition. Consult the factory for details. 



39



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 215-29 (2) 5 1103 845 1013 770 888 678 759 588 1026 789 

AT 215-39 (2) 7.5 1189 915 1093 838 961 740 827 644 1107 858 

AT 215-49 (2) 10 1269 983 1170 901 1031 800 890 700 1185 923 

AT 215-59 (2) 7.5 1285 1017 1193 940 1063 842 928 743 1206 960 

AT 215-69 (2) 10 1381 1100 1284 1018 1148 915 1006 813 1298 1039 

AT 215-79 (2) 10 1419 1145 1323 1067 1191 972 1056 876 1336 1087 

AT 215-89 (2) 15 1505 1208 1402 1120 1258 1011 1108 902 1417 1143 

AT 215-99 (2) 15 1570 1268 1464 1183 1318 1078 1171 976 1479 1205 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 215-29 (2) 5 962 742 821 1023 636 794 650 867 509 677 

AT 215-39 (2) 7.5 1039 808 890 1103 697 862 713 939 563 739 

AT 215-49 (2) 10 1113 870 958 1182 754 928 769 1008 616 799 

AT 215-59 (2) 7.5 1139 909 992 1203 797 965 812 1041 661 841 

AT 215-69 (2) 10 1228 987 1074 1295 869 1044 884 1125 726 914 

AT 215-79 (2) 10 1268 1038 1120 1333 929 1092 943 1169 795 971 

AT 215-89 (2) 15 1343 1087 1180 1414 963 1148 979 1234 810 1010 

AT 215-99 (2) 15 1404 1151 1241 1475 1032 1210 1047 1294 888 1077 





40 





ACCESS 

DOOR 

30 5/8 


30 5/8 

ACCESS 

DOOR 

21 3/8 

21 3/8 

F 

(2) 6 BFW/GROOVED 

INLET 

44 7/8 

T 

2 

H 

P 

B 

(2) 3 FPT 


OVERFLOW 

OUTLET 

68 5/8 23 1/8 

(2) 2 MPT 

MAKE-UP 

80 7/8 

14 7/8 

(2) 3 FPT 

DRAIN 

84 1/2 

6 1/2 

85 5/8 

5 1/8 

89 7/8 

3 5/8 

15' 4-7/8" 3/8 

8' 5-1/2" 

✦ 



Weights (LBS) 

Dimensions 

Fan Air 


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

AT 215-29 6900 11740 U 2280 (2) 5 62,600 10' 3-3/8" 5' 7-1/8" 4' 8-1/4" 7' 10-1/2" 1' 7/8" 2' 5-7/8" 

AT 215-39 6980 11820 U 2320 (2) 7.5 71,400 10' 3-3/8" 5' 7-1/8" 4' 8-1/4" 7' 10-1/2" 1' 7/8" 2' 5-7/8" 

AT 215-49 7040 11880 U 2350 (2) 10 78,300 10' 3-3/8" 5' 7-1/8" 4' 8-1/4" 7' 10-1/2" 1' 7/8" 2' 5-7/8" 

AT 215-59 7440 12280 U 2550 (2) 7.5 70,200 11' 3-3/8" 6' 7-1/8" 4' 8-1/4" 8' 10-1/2" 1' 7/8" 2' 5-7/8" 

AT 215-69 7500 12340 U 2580 (2) 10 76,900 11' 3-3/8" 6' 7-1/8" 4' 8-1/4" 8' 10-1/2" 1' 7/8" 2' 5-7/8" 

AT 215-79 8040 12880 U 2850 (2) 10 75,700 12' 3-3/8" 7' 7-1/8" 4' 8-1/4" 9' 10-1/2" 1' 7/8" 2' 5-7/8" 

AT 215-89 7620 12460 U 2640 (2) 15 87,500 11' 3-3/8" 6' 7-1/8" 4' 8-1/4" 8' 10-1/2" 1' 7/8" 2' 5-7/8" 

AT 215-99 8160 13000 U 2910 (2) 15 86,000 12' 3-3/8" 7' 7-1/8" 4' 8-1/4" 9' 10-1/2" 1' 7/8" 2' 5-7/8" 

AT/USS 

F† 

UT 








41



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 19-59 10 774 613 718 566 640 507 559 448 726 578 

AT 19-69 15 819 640 758 588 671 524 581 460 767 601 

AT 19-79 15 889 713 828 661 742 596 653 531 837 674 

AT 19-89 15 918 741 856 691 770 630 684 570 864 704 

AT 19-99 20 1005 812 937 758 844 691 750 626 946 772 

AT 19-111 7.5 756 578 694 526 607 462 519 399 702 539 

AT 19-211 10 810 622 744 569 654 502 561 436 754 583 

AT 19-311 10 862 680 798 626 710 559 619 493 808 640 

AT 19-411 15 915 711 844 652 745 580 644 508 854 668 

AT 19-511 15 985 785 916 727 819 655 719 582 926 742 

AT 19-611 15 1025 828 955 771 860 703 764 634 965 786 

AT 19-711 20 1090 876 1015 813 912 735 804 657 1026 830 

AT 19-811 20 1132 914 1055 853 950 778 845 704 1066 869 

AT 19-911 25 1191 962 1110 898 1000 819 889 742 1122 914 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 19-59 10 686 548 598 724 480 581 490 627 399 507 

AT 19-69 15 723 569 623 765 495 605 505 656 407 523 

AT 19-79 15 793 641 696 835 567 677 577 728 476 595 

AT 19-89 15 821 672 725 862 603 707 612 756 518 629 

AT 19-99 20 899 737 794 944 661 775 671 828 571 690 

AT 19-111 7.5 659 507 561 700 434 542 443 593 346 461 

AT 19-211 10 707 548 605 752 472 586 482 638 379 502 

AT 19-311 10 763 606 663 806 529 643 539 695 438 558 

AT 19-411 15 804 629 692 852 547 671 558 728 447 579 

AT 19-511 15 876 705 767 923 621 746 632 803 519 654 

AT 19-611 15 916 750 810 963 672 789 682 844 576 702 

AT 19-711 20 973 789 856 1024 700 834 711 894 591 734 

AT 19-811 20 1012 830 895 1064 744 873 755 933 642 777 

AT 19-911 25 1065 874 942 1119 784 918 796 982 677 818 





42 





30 5/8 


ACCESS DOOR 

21 3/8 

F 

2 

T 

H 

Q 

ACCESS 

DOOR 

8 BFW/GVD 

INLET 

B 

P 

2 MPT 

MAKE-UP 

8' 5-1/2" 

3/8 

✦ 

23 1/8 

14 7/8 

7 1/2 

3 7/8 

5 3/8 

9 

3 FPT 

OVERFLOW 

3 FPT 

DRAIN 

S 

L 

8 BFW/GVD 

OUTLET 



Weights (LBS) 

Dimensions 

Fan Air 

AT/USS UT 



S&Q 

AT 19-59 4320 7160 U 3010 10 43,900 11' 3-1/2" 6' 11-5/8" 4' 3-7/8" 8' 7-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 19-69 4120 6960 U 2810 15 50,800 10' 3-1/2" 5' 11-5/8" 4' 3-7/8" 7' 7-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 19-79 4390 7230 U 3080 15 49,800 11' 3-1/2" 6' 11-5/8" 4' 3-7/8" 8' 7-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 19-89 4700 7540 U 3390 15 49,000 12' 3-1/2" 7' 11-5/8" 4' 3-7/8" 9' 7-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 19-99 4750 7590 U 3440 20 53,600 12' 3-1/2" 7' 11-5/8" 4' 3-7/8" 9' 7-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 19-111 4570 7870 U 3100 7.5 45,800 10' 3-1/2" 5' 11-5/8" 4' 3-7/8" 7' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 19-211 4600 7900 U 3130 10 50,200 10' 3-1/2" 5' 11-5/8" 4' 3-7/8" 7' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 19-311 4920 8220 U 3450 10 49,400 11' 3-1/2" 6' 11-5/8" 4' 3-7/8" 8' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 19-411 4670 7970 U 3200 15 57,100 10' 3-1/2" 5' 11-5/8" 4' 3-7/8" 7' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 19-511 4990 8290 U 3520 15 56,100 11' 3-1/2" 6' 11-5/8" 4' 3-7/8" 8' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 19-611 5340 8640 U 3870 15 55,100 12' 3-1/2" 7' 11-5/8" 4' 3-7/8" 9' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 19-711 5040 8340 U 3570 20 61,300 11' 3-1/2" 6' 11-5/8" 4' 3-7/8" 8' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 19-811 5390 8690 U 3920 20 60,300 12' 3-1/2" 7' 11-5/8" 4' 3-7/8" 9' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 19-911 5420 8720 U 3950 25 64,600 12' 3-1/2" 7' 11-5/8" 4' 3-7/8" 9' 7-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 







43



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 19-412 20 1114 871 1030 800 912 713 790 627 1043 818 

AT 19-512 15 1114 887 1036 821 926 739 812 656 1047 838 

AT 19-612 20 1219 978 1135 907 1018 819 897 731 1148 926 

AT 19-712 20 1251 1010 1166 943 1050 859 933 777 1178 960 

AT 19-812 25 1297 1045 1209 971 1087 879 961 787 1222 990 

AT 19-912 30 1375 1111 1282 1037 1155 946 1027 857 1295 1056 

AT 19-114 10 1016 777 932 707 816 621 697 537 944 725 

AT 19-214 10 1098 861 1016 793 902 705 783 620 1028 810 

AT 19-314 20 1226 952 1131 873 998 777 862 681 1145 894 

AT 19-414 15 1222 968 1134 895 1012 802 884 708 1147 914 

AT 19-514 15 1251 1009 1166 940 1049 853 930 768 1178 957 

AT 19-614 20 1337 1067 1243 988 1113 891 977 792 1257 1009 

AT 19-714 25 1440 1156 1342 1073 1204 969 1061 866 1356 1095 

AT 19-814 30 1520 1224 1417 1138 1274 1030 1126 923 1432 1160 

AT 19-914 30 1566 1266 1460 1181 1315 1077 1169 975 1476 1203 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 19-412 20 982 774 849 1040 675 823 687 892 555 712 

AT 19-512 15 991 796 867 1044 701 842 713 907 585 737 

AT 19-612 20 1088 880 956 1145 780 930 793 999 657 818 

AT 19-712 20 1119 917 989 1176 822 964 834 1031 707 858 

AT 19-812 25 1160 943 1021 1219 837 995 851 1067 709 878 

AT 19-912 30 1230 1009 1088 1292 905 1061 919 1134 783 945 

AT 19-114 10 885 682 754 941 583 729 596 797 466 620 

AT 19-214 10 969 766 839 1025 667 814 680 883 550 704 

AT 19-314 20 1077 843 927 1142 732 899 747 976 599 775 

AT 19-414 15 1084 866 945 1144 760 918 774 991 630 801 

AT 19-514 15 1118 914 986 1175 815 961 828 1029 697 852 

AT 19-614 20 1190 958 1042 1254 845 1014 860 1091 707 889 

AT 19-714 25 1286 1041 1130 1353 923 1100 938 1181 778 968 

AT 19-814 30 1359 1105 1197 1428 981 1166 998 1250 831 1029 

AT 19-914 30 1401 1149 1239 1472 1031 1208 1046 1291 890 1076 





44 





30 5/8 


ACCESS DOOR 

21 3/8 

F 

2 

T 

Q 

ACCESS 

DOOR 

8 BFW/GVD 

INLET 

H 

P 

B 

2 MPT 

MAKE-UP 

8' 5-1/2" 

3/8 

✦ 

23 1/8 

14 7/8 

7 1/2 

3 7/8 

5 3/8 

9 

3 FPT 

OVERFLOW 

3 FPT 

DRAIN 

S 

L 

8 BFW/GVD 

OUTLET 



Weights (LBS) 

Dimensions 

Fan Air 

AT/USS UT 



S&Q 

AT 19-412 5230 9090 U 3580 20 69,100 10' 7-7/8" 5' 11-5/8" 4' 8-1/4" 7' 11-1/2" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 5' 11-7/8" 

AT 19-512 5550 9410 U 3900 15 61,900 11' 7-7/8" 6' 11-5/8" 4' 8-1/4" 8' 11-1/2" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 5' 11-7/8" 

AT 19-612 5590 9450 U 3940 20 67,800 11' 7-7/8" 6' 11-5/8" 4' 8-1/4" 8' 11-1/2" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 5' 11-7/8" 

AT 19-712 5980 9840 U 4330 20 66,700 12' 7-7/8" 7' 11-5/8" 4' 8-1/4" 9' 11-1/2" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 5' 11-7/8" 

AT 19-812 5610 9470 U 3960 25 72,800 11' 7-7/8" 6' 11-5/8" 4' 8-1/4" 8' 11-1/2" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 5' 11-7/8" 

AT 19-912 6020 9880 U 4370 30 75,800 12' 7-7/8" 7' 11-5/8" 4' 8-1/4" 9' 11-1/2" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 5' 11-7/8" 

AT 19-114 5570 10080 U 3710 10 61,300 10' 7-7/8" 5' 11-5/8" 4' 8-1/4" 7' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 

AT 19-214 5980 10490 U 4120 10 60,300 11' 7-7/8" 6' 11-5/8" 4' 8-1/4" 8' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 

AT 19-314 5690 10200 U 3830 20 76,500 10' 7-7/8" 5' 11-5/8" 4' 8-1/4" 7' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 

AT 19-414 6060 10570 U 4200 15 68,600 11' 7-7/8" 6' 11-5/8" 4' 8-1/4" 8' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 

AT 19-514 6510 11020 U 4650 15 67,500 12' 7-7/8" 7' 11-5/8" 4' 8-1/4" 9' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 

AT 19-614 6100 10610 U 4240 20 75,000 11' 7-7/8" 6' 11-5/8" 4' 8-1/4" 8' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 

AT 19-714 6120 10630 U 4260 25 80,400 11' 7-7/8" 6' 11-5/8" 4' 8-1/4" 8' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 

AT 19-814 6140 10650 U 4280 30 85,200 11' 7-7/8" 6' 11-5/8" 4' 8-1/4" 8' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 

AT 19-914 6590 11100 U 4730 30 83,800 12' 7-7/8" 7' 11-5/8" 4' 8-1/4" 9' 11-1/2" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 6' 11-7/8" 







45



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 217-59 (2) 10 1547 1226 1437 1133 1281 1015 1119 896 1452 1157 

AT 217-69 (2) 15 1639 1281 1515 1176 1341 1047 1162 920 1534 1203 

AT 217-79 (2) 15 1779 1426 1656 1321 1485 1192 1307 1063 1674 1348 

AT 217-89 (2) 15 1836 1482 1711 1383 1541 1260 1369 1140 1729 1409 

AT 217-99 (2) 20 2009 1624 1873 1515 1688 1382 1500 1252 1893 1543 

AT 217-111 (2) 7.5 1530 1170 1403 1065 1229 937 1051 811 1421 1092 

AT 217-211 (2) 7.5 1609 1261 1489 1160 1321 1031 1145 906 1507 1186 

AT 217-311 (2) 10 1740 1374 1613 1266 1435 1132 1251 999 1632 1294 

AT 217-411 (2) 15 1849 1437 1707 1320 1508 1174 1303 1029 1727 1350 

AT 217-511 (2) 10 1828 1472 1703 1372 1531 1245 1358 1120 1721 1398 

AT 217-611 (2) 15 1988 1587 1849 1470 1655 1324 1453 1178 1869 1500 

AT 217-711 (2) 15 2069 1671 1929 1558 1737 1419 1542 1281 1949 1587 

AT 217-811 (2) 20 2200 1769 2050 1643 1842 1486 1625 1330 2071 1676 

AT 217-911 (2) 25 2403 1942 2241 1813 2019 1654 1794 1498 2264 1846 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 217-59 (2) 10 1373 1096 1196 1449 961 1162 979 1254 797 1013 

AT 217-69 (2) 15 1445 1137 1247 1530 991 1209 1010 1312 813 1046 

AT 217-79 (2) 15 1587 1282 1392 1670 1135 1355 1154 1456 953 1190 

AT 217-89 (2) 15 1641 1345 1451 1725 1205 1415 1223 1513 1036 1258 

AT 217-99 (2) 20 1797 1474 1589 1889 1323 1550 1342 1657 1143 1380 

AT 217-111 (2) 7.5 1333 1027 1136 1417 880 1098 899 1201 703 935 

AT 217-211 (2) 7.5 1420 1120 1228 1503 974 1192 994 1292 803 1029 

AT 217-311 (2) 10 1541 1225 1341 1628 1071 1301 1091 1406 887 1130 

AT 217-411 (2) 15 1625 1274 1400 1722 1107 1357 1129 1474 906 1172 

AT 217-511 (2) 10 1633 1334 1440 1717 1188 1404 1207 1503 1015 1243 

AT 217-611 (2) 15 1770 1424 1549 1865 1256 1507 1279 1622 1051 1322 

AT 217-711 (2) 15 1850 1515 1634 1944 1357 1594 1378 1705 1165 1417 

AT 217-811 (2) 20 1965 1594 1729 2067 1414 1684 1438 1806 1195 1483 

AT 217-911 (2) 25 2149 1764 1901 2259 1583 1854 1606 1982 1368 1652 





46 





ACCESS DOOR 

30 5/8 

30 5/8 


ACCESS DOOR 

21 3/8 

21 3/8 

F 

(2) 8 BFW/GVD 

INLET 

T 

ACCESS 

DOOR 

ACCESS 

DOOR 

50 3/4 

2 

H 

P 

60 1/4 

(2) 3 FPT 

OVERFLOW 

(2) 2 MPT 

MAKE-UP 

80 1/4 23 1/8 

92 1/2 

14 7/8 

96 1/8 

7 1/2 

97 1/4 

5 1/8 

101 1/2 

3 5/8 

17' 4-1/8" ✦ 3/8 

L 

(2) 3 FPT 

DRAIN 

(2) 8 BFW/GVD 

OUTLET 



Weights (LBS) 

Dimensions 

Fan Air 


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

AT 217-59 8640 14320 U 3010 (2) 10 87,800 12' 2-1/2" 7' 2-1/4" 9' 6-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-69 8240 13920 U 2810 (2) 15 101,500 11' 2-1/2" 6' 2-1/4" 8' 6-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-79 8780 14460 U 3080 (2) 15 99,500 12' 2-1/2" 7' 2-1/4" 9' 6-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-89 9400 15080 U 3390 (2) 15 97,900 13' 2-1/2" 8' 2-1/4" 10' 6-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-99 9500 15180 U 3440 (2) 20 107,100 13' 2-1/2" 8' 2-1/4" 10' 6-1/8" 8' 11-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-111 9140 15740 U 3100 (2) 7.5 91,800 11' 2-1/2" 6' 2-1/4" 8' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-211 9780 16380 U 3420 (2) 7.5 90,500 12' 2-1/2" 7' 2-1/4" 9' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-311 9840 16440 U 3450 (2) 10 99,100 12' 2-1/2" 7' 2-1/4" 10' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-411 9340 15940 U 3200 (2) 15 114,600 11' 2-1/2" 6' 2-1/4" 8' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-511 10540 17140 U 3800 (2) 10 97,400 13' 2-1/2" 8' 2-1/4" 10' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-611 9980 16580 U 3520 (2) 15 112,500 12' 2-1/2" 7' 2-1/4" 9' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-711 10680 17280 U 3870 (2) 15 110,600 13' 2-1/2" 8' 2-1/4" 10' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-811 10080 16680 U 3570 (2) 20 123,000 12' 2-1/2" 7' 2-1/4" 9' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 

AT 217-911 10840 17440 U 3950 (2) 25 129,700 13' 2-1/2" 8' 2-1/4" 10' 6-1/8" 10' 5-1/2" 1' 7/8" 2' 9-7/8" 








AT/USS 

F† 

UT 

47



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 217-412 (2) 20 2174 1696 2009 1558 1777 1386 1539 1217 2033 1593 

AT 217-512 (2) 15 2178 1732 2023 1602 1807 1438 1583 1275 2046 1635 

AT 217-612 (2) 20 2384 1911 2220 1771 1990 1597 1751 1424 2244 1807 

AT 217-712 (2) 20 2448 1977 2282 1844 2055 1680 1825 1519 2306 1878 

AT 217-812 (2) 25 2538 2041 2366 1897 2126 1716 1876 1536 2390 1935 

AT 217-912 (2) 30 2691 2174 2508 2029 2260 1850 2008 1676 2535 2066 

AT 217-214 (2) 15 2412 1909 2239 1763 1995 1580 1742 1394 2264 1802 

AT 217-314 (2) 25 2612 2044 2417 1877 2140 1673 1854 1471 2446 1920 

AT 217-414 (2) 20 2640 2105 2455 1949 2196 1754 1926 1560 2482 1990 

AT 217-514 (2) 20 2712 2189 2528 2041 2276 1858 2020 1676 2554 2079 

AT 217-614 (2) 25 2845 2283 2650 2117 2377 1911 2094 1706 2679 2160 

AT 217-714 (2) 25 2934 2370 2735 2211 2463 2015 2188 1823 2763 2252 

AT 217-814 (2) 30 3003 2417 2799 2247 2515 2032 2222 1819 2828 2290 

AT 217-914 (2) 30 3094 2500 2884 2333 2598 2127 2309 1926 2915 2376 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 217-412 (2) 20 1916 1505 1651 2028 1310 1601 1337 1738 1074 1384 

AT 217-512 (2) 15 1936 1553 1691 2041 1366 1643 1390 1771 1138 1436 

AT 217-612 (2) 20 2127 1718 1866 2238 1520 1815 1546 1952 1276 1595 

AT 217-712 (2) 20 2188 1793 1934 2300 1607 1886 1631 2017 1381 1677 

AT 217-812 (2) 25 2268 1841 1995 2385 1633 1944 1660 2085 1381 1713 

AT 217-912 (2) 30 2406 1974 2128 2529 1771 2075 1797 2218 1530 1848 

AT 217-214 (2) 15 2139 1706 1863 2258 1495 1811 1523 1953 1239 1578 

AT 217-314 (2) 25 2304 1815 1991 2439 1583 1930 1613 2093 1303 1670 

AT 217-414 (2) 20 2349 1889 2056 2476 1665 1999 1695 2152 1392 1752 

AT 217-514 (2) 20 2424 1984 2141 2548 1777 2088 1804 2234 1523 1856 

AT 217-614 (2) 25 2539 2054 2231 2672 1819 2170 1850 2331 1532 1908 

AT 217-714 (2) 25 2623 2150 2319 2757 1927 2261 1956 2418 1659 2012 

AT 217-814 (2) 30 2684 2180 2362 2821 1935 2301 1967 2468 1637 2029 

AT 217-914 (2) 30 2767 2270 2446 2908 2035 2386 2066 2551 1757 2124 





48 





ACCESS DOOR 

30 5/8 

30 5/8 

ACCESS DOOR 


21 3/8 

21 3/8 

F 

(2) 8 BFW/GVD 

INLET 

T 

ACCESS 

DOOR 

ACCESS 

DOOR 

50 3/4 

2 

H 

P 

B 

(2) 3 FPT 

OVERFLOW 

(2) 2 MPT 

MAKE-UP 

(2) 3 FPT 

DRAIN 

5 1/8 

17' 4-1/8" 

(2) 8 BFW/GVD OUTLET 

80 1/4 

92 1/2 

96 1/8 

97 1/4 

101 1/2 

23 1/8 

14 7/8 

7 1/2 

3 3/4 

✦ 

3/8 

L 



Weights (LBS) 

Dimensions 

Fan Air 



AT 217-412 10460 18180 U 3580 (2) 20 136,200 11' 2-1/2" 6' 2-1/4" 5' 1/4" 8' 6-1/8" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-512 11100 18820 U 3900 (2) 15 122,000 12' 2-1/2" 7' 2-1/4" 5' 1/4" 9' 6-1/8" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-612 11180 18900 U 3940 (2) 20 133,500 12' 2-1/2" 7' 2-1/4" 5' 1/4" 9' 6-1/8" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-712 11960 19680 U 4330 (2) 20 131,400 13' 2-1/2" 8' 2-1/4" 5' 1/4" 10' 6-1/8" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-812 11220 18940 U 3960 (2) 25 143,200 12' 2-1/2" 7' 2-1/4" 5' 1/4" 9' 6-1/8" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-912 12040 19760 U 4370 (2) 30 149,300 13' 2-1/2" 8' 2-1/4" 5' 1/4" 10' 6-1/8" 11' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-214 12120 21140 U 4200 (2) 15 137,700 12' 8-1/2" 7' 2-1/4" 5' 6-1/4" 10' 1/8" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-314 11420 20440 U 3850 (2) 25 164,700 11' 8-1/2" 6' 2-1/4" 5' 6-1/4" 9' 1/8" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-414 12200 21220 U 4240 (2) 20 150,600 12' 8-1/2" 7' 2-1/4" 5' 6-1/4" 10' 1/8" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-514 13100 22120 U 4690 (2) 20 148,300 13' 8-1/2" 8' 2-1/4" 5' 6-1/4" 11' 1/8" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-614 12240 21260 U 4260 (2) 25 161,500 12' 8-1/2" 7' 2-1/4" 5' 6-1/4" 10' 1/8" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-714 13140 22160 U 4710 (2) 25 158,900 13' 8-1/2" 8' 2-1/4" 5' 6-1/4" 11' 1/8" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-814 12280 21300 U 4280 (2) 30 171,100 12' 8-1/2" 7' 2-1/4" 5' 6-1/4" 10' 1/8" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 

AT 217-914 13180 22200 U 4730 (2) 30 168,200 13' 8-1/2" 8' 2-1/4" 5' 6-1/4" 11' 1/8" 13' 11-3/4" 1' 7/8" 2' 9-7/8" 








AT/USS 

F† 

UT 

49



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 29-318 (2) 7.5 1329 1017 1219 926 1068 814 913 706 1235 949 

AT 29-418 (2) 10 1448 1115 1332 1021 1171 902 1008 785 1348 1045 

AT 29-518 (2) 10 1570 1244 1458 1149 1300 1030 1135 909 1474 1174 

AT 29-618 (2) 15 1663 1300 1538 1194 1361 1063 1179 934 1556 1221 

AT 29-718 (2) 15 1805 1447 1681 1341 1507 1210 1326 1079 1699 1368 

AT 29-818 (2) 15 1863 1504 1736 1403 1564 1279 1389 1157 1755 1429 

AT 29-918 (2) 20 2039 1648 1901 1538 1713 1402 1522 1270 1921 1566 

AT 29-121 (2) 7.5 1532 1171 1405 1065 1230 936 1051 809 1423 1092 

AT 29-221 (2) 7.5 1613 1263 1492 1161 1323 1032 1146 906 1510 1188 

AT 29-321 (2) 10 1745 1377 1617 1268 1438 1133 1253 999 1636 1296 

AT 29-421 (2) 15 1853 1439 1710 1321 1509 1175 1303 1029 1730 1352 

AT 29-521 (2) 10 1834 1477 1709 1376 1536 1248 1362 1122 1727 1402 

AT 29-621 (2) 15 1994 1590 1855 1472 1659 1326 1456 1179 1875 1503 

AT 29-721 (2) 15 2076 1676 1935 1562 1742 1423 1546 1285 1955 1592 

AT 29-821 (2) 20 2207 1773 2057 1647 1847 1488 1629 1331 2078 1681 

AT 29-921 (2) 25 2411 1949 2248 1819 2025 1659 1800 1502 2272 1852 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 29-318 (2) 7.5 1158 892 988 1231 765 955 781 1043 611 813 

AT 29-418 (2) 10 1266 984 1085 1344 850 1050 868 1144 687 901 

AT 29-518 (2) 10 1393 1112 1213 1470 975 1180 994 1273 809 1028 

AT 29-618 (2) 15 1467 1154 1265 1552 1006 1227 1025 1331 826 1061 

AT 29-718 (2) 15 1610 1301 1413 1695 1152 1375 1171 1478 967 1208 

AT 29-818 (2) 15 1665 1365 1472 1750 1223 1436 1241 1535 1052 1277 

AT 29-918 (2) 20 1824 1496 1613 1917 1342 1573 1362 1681 1160 1401 

AT 29-121 (2) 7.5 1334 1027 1136 1419 879 1098 898 1202 701 934 

AT 29-221 (2) 7.5 1423 1120 1230 1506 974 1194 994 1294 802 1030 

AT 29-321 (2) 10 1545 1227 1343 1632 1071 1303 1092 1408 887 1131 

AT 29-421 (2) 15 1628 1275 1401 1726 1107 1359 1129 1475 905 1173 

AT 29-521 (2) 10 1638 1337 1445 1723 1191 1408 1210 1508 1018 1246 

AT 29-621 (2) 15 1775 1427 1553 1870 1258 1511 1281 1626 1052 1324 

AT 29-721 (2) 15 1856 1520 1640 1951 1361 1599 1382 1710 1167 1421 

AT 29-821 (2) 20 1971 1598 1733 2073 1417 1688 1441 1812 1197 1486 

AT 29-921 (2) 25 2157 1769 1907 2266 1588 1860 1611 1988 1372 1657 





50 





30 5/8 


30 5/8 

ACCESS DOOR 

ACCESS DOOR 

21 3/8 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

T 

(2) 8 BFW/GVD 

INLET 

2 

Q 

Q 

H 

P 

B 

2 MPT 

MAKE-UP 

(2) 8 BFW/GVD 

OUTLET 

8' 5-1/2" 

3/8 

✦ 

23 1/8 

14 7/8 

7 1/2 

3 7/8 

9 

5 3/8 

3 FPT 

OVERFLOW 

3 FPT 

DRAIN 

S 

L 

S 



Weights (LBS) 

Dimensions 

Fan Air 

AT/USS UT 



S&Q 

AT 29-318 7920 13810 U 5370 (2) 7.5 81,900 10' 11-7/8" 5' 11-5/8" 5' 1/4" 8' 3-1/2" 18' 0" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 29-418 7980 13870 U 5430 (2) 10 89,800 10' 11-7/8" 5' 11-5/8" 5' 1/4" 8' 3-1/2" 18' 0" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 29-518 8510 14400 U 5960 (2) 10 88,200 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 18' 0" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 29-618 8120 14010 U 5570 (2) 15 102,000 10' 11-7/8" 5' 11-5/8" 5' 1/4" 8' 3-1/2" 18' 0" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 29-718 8650 14540 U 6100 (2) 15 100,100 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 18' 0" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 29-818 9230 15120 U 6680 (2) 15 98,400 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 18' 0" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 29-918 9330 15220 U 6780 (2) 20 107,600 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 18' 0" 1' 7/8" 2' 9-7/8" 4' 5-3/4" 

AT 29-121 9000 15940 U 6210 (2) 7.5 91,800 10' 11-7/8" 5' 11-5/8" 5' 1/4" 8' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 29-221 9610 16550 U 6820 (2) 7.5 90,500 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 29-321 9670 16610 U 6880 (2) 10 99,200 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 29-421 9200 16140 U 6410 (2) 15 114,600 10' 11-7/8" 5' 11-5/8" 5' 1/4" 8' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 29-521 10330 17270 U 7540 (2) 10 97,500 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 29-621 9810 16750 U 7020 (2) 15 112,500 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 29-721 10470 17410 U 7680 (2) 15 110,700 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 29-821 9910 16850 U 7120 (2) 20 123,000 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 

AT 29-921 10630 17570 U 7840 (2) 25 129,800 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 21' 0" 1' 7/8" 2' 9-7/8" 5' 2-3/4" 





(5) These models are available as (2) independent operating cells with the addition of a water tight basin partition. Consult the factory for details. 



51



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 29-024 (2) 10 1973 1556 1828 1433 1626 1280 1416 1129 1849 1465 

AT 29-124 (2) 10 2022 1627 1883 1515 1693 1373 1499 1234 1903 1545 

AT 29-224 (2) 20 2204 1722 2038 1581 1803 1408 1562 1237 2062 1617 

AT 29-324 (2) 15 2205 1756 2050 1624 1832 1460 1605 1296 2072 1658 

AT 29-424 (2) 15 2253 1817 2099 1694 1890 1542 1676 1389 2121 1726 

AT 29-524 (2) 20 2414 1936 2248 1795 2016 1620 1775 1445 2272 1831 

AT 29-624 (2) 20 2478 2001 2310 1867 2080 1701 1848 1539 2334 1902 

AT 29-724 (2) 25 2569 2068 2395 1923 2153 1739 1902 1557 2420 1960 

AT 29-824 (2) 25 2642 2135 2463 1992 2219 1816 1972 1644 2489 2029 

AT 29-924 (2) 30 2724 2201 2539 2054 2287 1874 2033 1697 2566 2092 

AT 29-228 (2) 15 2457 1947 2281 1800 2034 1613 1779 1425 2306 1838 

AT 29-328 (2) 25 2662 2086 2465 1918 2185 1711 1894 1507 2493 1962 

AT 29-428 (2) 20 2687 2146 2499 1988 2239 1791 1965 1593 2526 2029 

AT 29-528 (2) 20 2760 2228 2572 2077 2316 1892 2056 1708 2599 2116 

AT 29-628 (2) 25 2895 2325 2698 2158 2421 1949 2134 1742 2726 2202 

AT 29-728 (2) 25 2985 2411 2783 2250 2506 2050 2227 1856 2812 2291 

AT 29-828 (2) 30 3055 2461 2848 2288 2561 2071 2264 1856 2877 2333 

AT 29-928 (2) 30 3148 2544 2935 2374 2644 2165 2350 1960 2965 2417 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 29-024 (2) 10 1746 1387 1518 1845 1211 1473 1234 1592 1002 1278 

AT 29-124 (2) 10 1805 1471 1592 1899 1310 1551 1331 1661 1118 1371 

AT 29-224 (2) 20 1943 1529 1677 2057 1332 1626 1358 1764 1094 1406 

AT 29-324 (2) 15 1962 1574 1714 2067 1386 1666 1410 1795 1156 1458 

AT 29-424 (2) 15 2013 1647 1778 2116 1472 1733 1496 1855 1261 1540 

AT 29-524 (2) 20 2153 1742 1891 2267 1542 1840 1568 1977 1296 1617 

AT 29-624 (2) 20 2215 1815 1958 2329 1627 1910 1652 2042 1400 1699 

AT 29-724 (2) 25 2297 1866 2021 2414 1656 1969 1684 2112 1401 1737 

AT 29-824 (2) 25 2363 1938 2089 2483 1738 2037 1764 2178 1500 1814 

AT 29-924 (2) 30 2436 1998 2154 2560 1793 2101 1820 2246 1550 1871 

AT 29-228 (2) 15 2180 1742 1900 2300 1529 1847 1558 1992 1269 1611 

AT 29-328 (2) 25 2350 1854 2033 2487 1619 1972 1649 2137 1337 1708 

AT 29-428 (2) 20 2393 1927 2095 2520 1700 2039 1731 2194 1423 1789 

AT 29-528 (2) 20 2467 2020 2179 2593 1809 2125 1837 2273 1552 1889 

AT 29-628 (2) 25 2585 2094 2272 2720 1856 2212 1887 2375 1567 1947 

AT 29-728 (2) 25 2669 2188 2360 2805 1962 2301 1991 2460 1690 2048 

AT 29-828 (2) 30 2731 2222 2406 2871 1974 2343 2007 2513 1671 2068 

AT 29-928 (2) 30 2815 2309 2489 2959 2072 2428 2103 2595 1790 2162 





52 






30 5/8 

30 5/8 

ACCESS DOOR 

ACCESS DOOR 

21 3/8 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

T 

(2) 8 BFW/GVD 

INLET 

2 

Q 

H 

P 

B 

(2) 8 BFW/GVD 

OUTLET 

(2) 3 FPT 

OVERFLOW 

8' 5-1/2" 3/8 

✦ 

23 1/8 

14 7/8 

7 1/2 

3 7/8 

S 

(2) 3 FPT 

DRAIN 

(2) 2 MPT 

N 

MAKE-UP 

5 3/8 

M 2 1/2 

L 



Weights (LBS) 

Dimensions 

Fan Air 


AT/USS UT 


M N S&Q 

AT 29-024 10920 18640 U 3820 (2) 10 107,900 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-124 11700 19420 U 4210 (2) 10 106,200 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-224 10440 18160 U 3580 (2) 20 137,000 10' 11-7/8" 5' 11-5/8" 5' 1/4" 8' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-324 11080 18800 U 3900 (2) 15 122,600 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-424 11860 19580 U 4290 (2) 15 120,700 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-524 11160 18880 U 3940 (2) 20 134,100 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-624 11940 19660 U 4330 (2) 20 132,100 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-724 11200 18920 U 3960 (2) 25 144,000 11' 11-7/8" 6' 11-5/8" 5' 1/4" 9' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-824 11980 19700 U 4350 (2) 25 141,600 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-924 12020 19740 U 4370 (2) 30 150,100 12' 11-7/8" 7' 11-5/8" 5' 1/4" 10' 3-1/2" 24' 2" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 29-228 12180 21200 U 4200 (2) 15 137,800 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 28' 2" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 29-328 11480 20500 U 3850 (2) 25 164,700 11' 5-7/8" 5' 11-5/8" 5' 6-1/4" 8' 9-1/2" 28' 2" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 29-428 12260 21280 U 4240 (2) 20 150,600 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 28' 2" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 29-528 13160 22180 U 4690 (2) 20 148,300 13' 5-7/8" 7' 11-5/8" 5' 6-1/4" 10' 9-1/2" 28' 2" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 29-628 12300 21320 U 4260 (2) 25 161,600 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 28' 2" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 29-728 13200 22220 U 4710 (2) 25 159,000 13' 5-7/8" 7' 11-5/8" 5' 6-1/4" 10' 9-1/2" 28' 2" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 29-828 12340 21360 U 4280 (2) 30 171,200 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 28' 2" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 29-928 13240 22260 U 4730 (2) 30 168,200 13' 5-7/8" 7' 11-5/8" 5' 6-1/4" 10' 9-1/2" 28' 2" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 








53



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 39-336 (3) 10 2755 2115 2531 1931 2222 1706 1905 1480 2564 1980 

AT 39-436 (3)15 3044 2358 2806 2160 2473 1916 2132 1677 2842 2211 

AT 39-536 (3) 20 3323 2599 3074 2386 2721 2126 2357 1869 3110 2441 

AT 39-636 (3) 15 3325 2648 3091 2450 2763 2203 2422 1956 3125 2501 

AT 39-736 (3) 20 3638 2919 3389 2707 3040 2443 2677 2181 3425 2762 

AT 39-836 (3) 25 3873 3118 3610 2899 3245 2623 2868 2349 3648 2955 

AT 39-936 (3) 30 4105 3318 3827 3096 3448 2824 3065 2558 3867 3153 

AT 39-242 (3) 10 3049 2330 2796 2121 2449 1863 2092 1611 2832 2174 

AT 39-342 (3) 15 3365 2591 3093 2372 2721 2096 2341 1824 3132 2427 

AT 39-442 (3) 10 3373 2712 3140 2519 2821 2281 2491 2048 3174 2569 

AT 39-542 (3) 25 3971 3112 3677 2860 3258 2550 2825 2245 3720 2925 

AT 39-642 (3) 25 4321 3469 4027 3220 3613 2908 3184 2598 4069 3285 

AT 39-742 (3) 25 4456 3599 4154 3358 3741 3061 3324 2770 4197 3420 

AT 39-842 (3) 30 4560 3673 4251 3415 3822 3090 3379 2768 4295 3481 

AT 39-942 (3) 30 4699 3797 4381 3543 3946 3231 3507 2926 4427 3609 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 39-336 (3) 10 2404 1861 2057 2557 1600 1992 1635 2170 1286 1702 

AT 39-436 (3) 15 2670 2086 2296 2834 1807 2224 1843 2417 1474 1913 

AT 39-536 (3) 20 2931 2308 2530 3102 2012 2453 2050 2661 1653 2122 

AT 39-636 (3) 15 2957 2375 2586 3117 2091 2513 2128 2707 1745 2199 

AT 39-736 (3) 20 3247 2627 2852 3417 2326 2775 2365 2981 1957 2440 

AT 39-836 (3) 25 3462 2814 3048 3639 2498 2969 2540 3184 2114 2619 

AT 39-936 (3) 30 3672 3012 3247 3858 2703 3167 2743 3385 2336 2821 

AT 39-242 (3) 10 2655 2045 2262 2824 1750 2186 1788 2392 1397 1860 

AT 39-342 (3) 15 2940 2286 2520 3123 1974 2441 2017 2659 1595 2092 

AT 39-442 (3) 10 3010 2445 2651 3166 2174 2580 2209 2769 1852 2277 

AT 39-542 (3) 25 3506 2765 3033 3710 2413 2941 2458 3187 1991 2546 

AT 39-642 (3) 25 3858 3124 3391 4059 2768 3301 2815 3544 2335 2904 

AT 39-742 (3) 25 3984 3266 3522 4188 2928 3435 2972 3673 2522 3057 

AT 39-842 (3) 30 4077 3316 3590 4285 2944 3497 2994 3750 2493 3086 

AT 39-942 (3) 30 4203 3447 3716 4416 3092 3624 3139 3874 2671 3227 





54 




Three-Cell Cooling Towers 


30 5/8 

30 5/8 30 5/8 

ACCESS DOOR 

ACCESS DOOR 

ACCESS DOOR 

21 3/8 

F 

T 

ACCESS 

DOOR 

ACCESS 

DOOR 

(3) 8 BFW/GVD 

INLET 

ACCESS 

DOOR 

2 

Q 

H 

P 

B 

(3) 8 BFW/GVD 

OUTLET 

8' 5-1/2" 3/8 

✦ 

23 1/8 

14 7/8 

7 1/2 

3 7/8 

S 

9 

5 3/8 

N 

5 3/8 

M 2 1/2 

L 

(3) 3 FPT 

DRAIN 

(3) 2 MPT 

MAKE-UP 

(3) 3 FPT 

OVERFLOW 



Weights (LBS) 

Dimensions 

Fan Air 


AT/USS UT 


M N S&Q 

AT 39-336 15390 26970 U 3460 (3) 10 165,200 11' 5-7/8" 5' 11-5/8" 5' 6-1/4" 8' 9-1/2" 36' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-436 15630 27210 U 3540 (3) 15 188,200 11' 5-7/8" 5' 11-5/8" 5' 6-1/4" 8' 9-1/2" 36' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-536 15750 27330 U 3580 (3) 20 206,200 11' 5-7/8" 5' 11-5/8" 5' 6-1/4" 8' 9-1/2" 36' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-636 16710 28290 U 3900 (3) 15 184,900 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 36' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-736 16830 28410 U 3940 (3) 20 202,200 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 36' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-836 16890 28470 U 3960 (3) 25 217,100 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 36' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-936 18120 29700 U 4370 (3) 30 226,200 13' 5-7/8" 7' 11-5/8" 5' 6-1/4" 10' 9-1/2" 36' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-242 16770 30300 U 3710 (3) 10 183,700 11' 5-7/8" 5' 11-5/8" 5' 6-1/4" 8' 9-1/2" 42' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-342 17010 30540 U 3790 (3) 15 209,300 11' 5-7/8" 5' 11-5/8" 5' 6-1/4" 8' 9-1/2" 42' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-442 19350 32880 U 4570 (3) 10 177,900 13' 5-7/8" 7' 11-5/8" 5' 6-1/4" 10' 9-1/2" 42' 4-1/4" 1' 7/8" 2' 9-7/8" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 39-542 17190 30720 U 3850 (3) 25 246,200 11' 5-7/8" 5' 11-5/8" 5' 6-1/4" 8' 9-1/2" 42' 4-1/4" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 39-642 18420 31950 U 4260 (3) 25 241,300 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 42' 4-1/4" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 39-742 19770 33300 U 4710 (3) 25 237,400 13' 5-7/8" 7' 11-5/8" 5' 6-1/4" 10' 9-1/2" 42' 4-1/4" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 39-842 18480 32010 U 4280 (3) 30 255,700 12' 5-7/8" 6' 11-5/8" 5' 6-1/4" 9' 9-1/2" 42' 4-1/4" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 

AT 39-942 19830 33360 U 4730 (3) 30 251,200 13' 5-7/8" 7' 11-5/8" 5' 6-1/4" 10' 9-1/2" 42' 4-1/4" 1' 7/8" 2' 9-7/8" 13' 11-3/4" 13' 2-3/4" 6' 11-7/8" 








55



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 110-112 (1) 15 1200 950 1114 877 993 786 867 693 1127 897 

AT 110-212 (1) 25 1284 1004 1188 922 1051 821 910 721 1202 943 

AT 110-312 (1) 20 1302 1038 1211 960 1083 864 949 767 1224 980 

AT 110-412 (1) 30 1342 1053 1243 969 1103 864 957 762 1257 991 

AT 110-512 (1) 25 1384 1108 1288 1027 1155 926 1016 826 1302 1048 

AT 110-612 (1) 25 1417 1144 1321 1067 1189 972 1056 879 1334 1087 

AT 110-712 (1) 30 1452 1167 1353 1083 1215 979 1071 875 1368 1105 

AT 110-812 (1) 30 1490 1204 1389 1123 1251 1024 1112 927 1404 1144 

AT 110-912 (1) 35 1556 1257 1450 1173 1306 1070 1161 968 1465 1195 

AT 110-118 (1) 20 1569 1202 1440 1095 1262 964 1080 837 1459 1122 

AT 110-218 (1) 15 1608 1289 1496 1197 1344 1082 1184 970 1512 1220 

AT 110-318 (1) 20 1708 1345 1581 1237 1405 1103 1223 972 1599 1265 

AT 110-418 (1) 30 1772 1371 1632 1256 1438 1113 1239 973 1653 1285 

AT 110-518 (1) 25 1828 1447 1697 1337 1512 1198 1321 1058 1715 1366 

AT 110-618 (1) 30 1926 1533 1790 1417 1599 1273 1401 1129 1810 1447 

AT 110-718 (1) 30 1984 1600 1849 1492 1664 1358 1476 1223 1868 1520 

AT 110-818 (1) 40 2096 1679 1951 1556 1749 1403 1539 1251 1972 1588 

AT 110-918 (1) 40 2163 1747 2016 1629 1816 1484 1613 1343 2037 1660 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 110-112 (1) 15 1064 849 927 1124 743 901 758 972 616 785 

AT 110-212 (1) 25 1132 891 977 1199 776 947 791 1028 637 819 

AT 110-312 (1) 20 1159 931 1013 1221 820 985 834 1061 685 862 

AT 110-412 (1) 30 1186 936 1026 1254 818 996 833 1079 676 863 

AT 110-512 (1) 25 1234 997 1082 1299 881 1053 897 1133 739 925 

AT 110-612 (1) 25 1267 1038 1120 1331 930 1092 944 1167 799 971 

AT 110-712 (1) 30 1297 1051 1140 1364 932 1111 947 1192 787 977 

AT 110-812 (1) 30 1333 1093 1178 1401 980 1149 994 1228 844 1023 

AT 110-912 (1) 35 1391 1141 1230 1462 1024 1200 1039 1282 884 1068 

AT 110-118 (1) 20 1368 1055 1168 1454 905 1129 925 1233 724 962 

AT 110-218 (1) 15 1434 1161 1259 1509 1031 1226 1048 1317 877 1080 

AT 110-318 (1) 20 1510 1198 1310 1595 1044 1271 1064 1376 863 1102 

AT 110-418 (1) 30 1553 1213 1335 1648 1050 1292 1071 1405 856 1111 

AT 110-518 (1) 25 1621 1294 1412 1711 1134 1372 1156 1481 941 1196 

AT 110-618 (1) 30 1713 1374 1496 1805 1209 1454 1230 1567 1008 1271 

AT 110-718 (1) 30 1773 1450 1566 1864 1297 1526 1317 1633 1110 1356 

AT 110-818 (1) 40 1869 1510 1640 1967 1335 1595 1359 1715 1121 1401 

AT 110-918 (1) 40 1934 1585 1709 2033 1420 1667 1441 1782 1221 1482 





56 





*110-112 thru 110-912 

(1) 8" Inlet 

(1) 8" Outlet 

ACCESS DOOR 

Access Doors Swing 

Inside Unit 

*110-118 thru 110-918 

(1) 10" Inlet 

(1) 10" Outlet 

7 

F 

ACCESS 

DOOR 

2 

T 

Q 

* BFW/GVD 

INLET 

H 

B 

P 

2 MPT 

MAKE-UP 

25 1/4 

16 7/8 

7 1/4 

3 5/8 

5 1/4 

3 FPT 

OVERFLOW 

3 FPT 

DRAIN 

* BFW/GVD 

OUTLET 

9 

S 

9' 9-3/4" 

3/8 

✦ 

L 



Weights (LBS) 

Dimensions 

Fan Air 

AT/USS UT† 


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

S&Q 

AT 110-112 6840 12380 U 4750 15 72,300 13' 2" 7' 11-3/4" 5' 2-1/4" 9' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 110-212 6460 12000 U 4370 25 86,500 12' 2" 6' 11-3/4" 5' 2-1/4" 8' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 110-312 6890 12430 U 4800 20 79,000 13' 2" 7' 11-3/4" 5' 2-1/4" 9' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 110-412 6560 12100 U 4470 30 91,700 12' 2" 6' 11-3/4" 5' 2-1/4" 8' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 110-512 6940 12480 U 4850 25 85,000 13' 2" 7' 11-3/4" 5' 2-1/4" 9' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 110-612 7360 12900 U 5270 25 83,700 14' 2" 8' 11-3/4" 5' 2-1/4" 10' 1" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 5' 11-7/8" 

AT 110-712 7040 12580 U 4950 30 89,800 13' 2" 7' 11-3/4" 5' 2-1/4" 9' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 110-812 7460 13000 U 5370 30 88,600 14' 2" 8' 11-3/4" 5' 2-1/4" 10' 1" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 5' 11-7/8" 

AT 110-912 7710 13250 U 5620 35 92,800 14' 2" 8' 11-3/4" 5' 2-1/4" 10' 1" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 5' 11-7/8" 

AT 110-118 8910 17320 U 5760 20 107,200 12' 2" 6' 11-3/4" 5' 2-1/4" 8' 0" 18' 0" 1' 3-1/4" 3' 3/4" 9' 0" 

AT 110-218 10180 18590 U 7030 15 94,700 14' 2" 8' 11-3/4" 5' 2-1/4" 10' 0" 18' 0" 1' 3-1/4"† 3' 3/4" 9' 0" 

AT 110-318 9600 18010 U 6450 20 105,500 13' 2" 7' 11-3/4" 5' 2-1/4" 9' 0" 18' 0" 1' 3-1/4" 3' 3/4" 9' 0" 

AT 110-418 9060 17470 U 5910 30 122,000 12' 2" 6' 11-3/4" 5' 2-1/4" 8' 0" 18' 0" 1' 3-1/4" 3' 3/4" 9' 0" 

AT 110-518 9650 18060 U 6500 25 113,100 13' 2" 7' 11-3/4" 5' 2-1/4" 9' 0" 18' 0" 1' 3-1/4" 3' 3/4" 9' 0" 

AT 110-618 9750 18160 U 6600 30 119,700 13' 2" 7' 11-3/4" 5' 2-1/4" 9' 0" 18' 0" 1' 3-1/4" 3' 3/4" 9' 0" 

AT 110-718 10380 18790 U 7230 30 117,800 14' 2" 8' 11-3/4" 5' 2-1/4" 10' 0" 18' 0" 1' 3-1/4"† 3' 3/4" 9' 0" 

AT 110-818 10000 18410 U 6850 40 131,200 13' 2" 7' 11-3/4" 5' 2-1/4" 9' 0" 18' 0" 1' 3-1/4" 3' 3/4" 9' 0" 

AT 110-918 10630 19040 U 7480 40 129,000 14' 2" 8' 11-3/4" 5' 2-1/4" 10' 0" 18' 0" 1' 3-1/4"† 3' 3/4" 9' 0" 





† Height does not include fan guard which ships loose. 


57



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 210-124 (2) 15 2401 1900 2229 1754 1985 1572 1733 1387 2253 1793 

AT 210-224 (2) 25 2569 2008 2375 1843 2102 1641 1820 1442 2404 1885 

AT 210-324 (2) 20 2604 2075 2421 1920 2165 1727 1898 1535 2448 1961 

AT 210-424 (2) 30 2684 2106 2486 1937 2206 1728 1913 1524 2514 1981 

AT 210-524 (2) 25 2768 2217 2576 2055 2310 1853 2032 1651 2604 2096 

AT 210-624 (2) 25 2834 2288 2641 2134 2378 1944 2112 1758 2669 2174 

AT 210-724 (2) 30 2905 2333 2707 2167 2430 1958 2143 1750 2735 2211 

AT 210-824 (2) 30 2981 2408 2779 2247 2503 2048 2224 1853 2808 2288 

AT 210-924 (2) 35 3111 2514 2900 2346 2613 2139 2322 1937 2931 2389 

AT 210-136 (2) 20 3138 2403 2880 2190 2524 1928 2160 1674 2917 2245 

AT 210-236 (2) 15 3215 2578 2993 2393 2687 2164 2367 1940 3025 2440 

AT 210-336 (2) 20 3415 2690 3162 2475 2810 2207 2445 1944 3199 2530 

AT 210-436 (2) 30 3543 2742 3265 2511 2875 2226 2479 1946 3306 2571 

AT 210-536 (2) 25 3655 2894 3393 2674 3024 2396 2642 2115 3431 2732 

AT 210-636 (2) 30 3852 3065 3580 2834 3198 2546 2802 2258 3619 2894 

AT 210-736 (2) 30 3968 3201 3698 2983 3328 2716 2952 2446 3736 3039 

AT 210-836 (2) 40 4191 3358 3902 3112 3498 2807 3078 2502 3944 3175 

AT 210-936 (2) 40 4326 3494 4033 3258 3631 2969 3225 2686 4075 3319 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 210-124 (2) 15 2128 1697 1854 2248 1487 1802 1515 1944 1233 1570 

AT 210-224 (2) 25 2265 1782 1954 2397 1553 1895 1583 2056 1275 1639 

AT 210-324 (2) 20 2317 1861 2027 2442 1640 1970 1669 2122 1369 1725 

AT 210-424 (2) 30 2371 1873 2053 2508 1635 1992 1666 2158 1352 1726 

AT 210-524 (2) 25 2468 1993 2165 2598 1763 2106 1794 2265 1479 1850 

AT 210-624 (2) 25 2533 2075 2239 2663 1860 2183 1888 2335 1598 1941 

AT 210-724 (2) 30 2594 2102 2281 2729 1863 2221 1895 2383 1574 1955 

AT 210-824 (2) 30 2665 2185 2356 2801 1959 2298 1989 2457 1688 2045 

AT 210-924 (2) 35 2782 2282 2460 2924 2047 2399 2078 2565 1768 2136 

AT 210-136 (2) 20 2736 2110 2336 2909 1810 2258 1849 2465 1449 1925 

AT 210-236 (2) 15 2867 2322 2518 3018 2063 2452 2096 2634 1754 2161 

AT 210-336 (2) 20 3020 2395 2620 3190 2088 2543 2127 2752 1727 2203 

AT 210-436 (2) 30 3106 2425 2669 3297 2100 2585 2141 2811 1712 2222 

AT 210-536 (2) 25 3242 2587 2824 3422 2268 2745 2311 2961 1881 2392 

AT 210-636 (2) 30 3425 2747 2992 3610 2417 2908 2460 3134 2015 2542 

AT 210-736 (2) 30 3546 2901 3131 3728 2593 3053 2634 3267 2220 2713 

AT 210-836 (2) 40 3738 3019 3279 3935 2671 3190 2717 3431 2241 2803 

AT 210-936 (2) 40 3868 3169 3419 4065 2840 3334 2883 3565 2442 2965 





58 





ACCESS DOOR 


Inside Unit 

ACCESS DOOR 

*210-124 thru 210-924 

(2) 8" Inlet 

(2) 8" Outlet 

*210-136 thru 210-936 

(2) 10" Inlet 


7 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

2 

T 

Q 

(2) * BFW/GVD 

INLET 

H 

P 

B 

9' 9-3/4" 3/8 

✦ 

25 1/4 

16 7/8 

7 1/4 

3 5/8 








S 

N 

5 1/4 

M 2 1/2 

L 

(2) 3 FPT 

OVERFLOW 

(2) 2 MPT 

MAKE-UP 

(2) 3 FPT 

DRAIN 

(2) * BFW/GVD 

OUTLET 



Weights (LBS) 

Dimensions 

Fan Air 


AT/USS UT† 


M N S&Q 

AT 210-124 13860 24940 U 4750 (2) 15 144,500 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 1" 24' 2" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-224 13100 24180 U 4370 (2) 25 172,900 13' 2" 6' 11-3/4" 6' 2-1/4" 9' 1" 24' 2" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-324 13960 25040 U 4800 (2) 20 158,300 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 1" 24' 2" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-424 13300 24380 U 4470 (2) 30 183,500 13' 2" 6' 11-3/4" 6' 2-1/4" 9' 1" 24' 2" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-524 14060 25140 U 4850 (2) 25 169,700 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 1" 24' 2" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-624 14900 25980 U 5270 (2) 25 167,200 15' 2" 8' 11-3/4" 6' 2-1/4" 11' 1" 24' 2" 1' 3-1/4" 3' 3/4"† 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-724 14260 25340 U 4950 (2) 30 179,900 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 1" 24' 2" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-824 15100 26180 U 5370 (2) 30 176,900 15' 2" 8' 11-3/4" 6' 2-1/4" 11' 1" 24' 2" 1' 3-1/4" 3' 3/4"† 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-924 15600 26680 U 5620 (2) 35 185,600 15' 2" 8' 11-3/4" 6' 2-1/4" 11' 1" 24' 2" 1' 3-1/4" 3' 3/4"† 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 210-136 18200 35010 U 5760 (2) 20 214,400 13' 2" 6' 11-3/4" 6' 2-1/4" 9' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 210-236 20740 37550 U 7030 (2) 15 189,400 15' 2" 8' 11-3/4" 6' 2-1/4" 11' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4"† 18' 0" 17' 3" 9' 0" 

AT 210-336 19580 36390 U 6450 (2) 20 211,000 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 210-436 18500 35310 U 5910 (2) 30 244,100 13' 2" 6' 11-3/4" 6' 2-1/4" 9' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 210-536 19680 36490 U 6500 (2) 25 226,300 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 210-636 19880 36690 U 6600 (2) 30 239,600 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 210-736 21140 37950 U 7230 (2) 30 235,800 15' 2" 8' 11-3/4" 6' 2-1/4" 11' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4"† 18' 0" 17' 3" 9' 0" 

AT 210-836 20380 37190 U 6850 (2) 40 262,300 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 210-936 21640 38450 U 7480 (2) 40 258,100 15' 2"" 8' 11-3/4" 6' 2-1/4" 11' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4"† 18' 0" 17' 3" 9' 0" 

59



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 310-136 (3) 15 3557 2812 3300 2595 2938 2323 2563 2049 3338 2652 

AT 310-236 (3) 25 3804 2968 3515 2725 3109 2426 2692 2129 3558 2787 

AT 310-336 (3) 20 3860 3073 3587 2842 3206 2555 2810 2267 3627 2902 

AT 310-436 (3) 30 3975 3116 3681 2864 3262 2554 2828 2249 3723 2929 

AT 310-536 (3) 25 4103 3283 3818 3042 3422 2742 3008 2442 3859 3104 

AT 310-636 (3) 25 4201 3392 3916 3163 3526 2881 3130 2603 3957 3222 

AT 310-736 (3) 30 4306 3457 4013 3208 3601 2897 3173 2588 4055 3273 

AT 310-836 (3) 30 4419 3570 4120 3330 3710 3035 3296 2747 4163 3392 

AT 310-936 (3) 35 4613 3727 4300 3478 3873 3171 3442 2871 4345 3542 

AT 310-154 (3) 20 4658 3565 4273 3246 3744 2855 3202 2474 4328 3327 

AT 310-254 (3) 15 4780 3830 4449 3556 3993 3214 3516 2881 4496 3626 

AT 310-354 (3) 20 5076 3992 4698 3673 4174 3273 3629 2881 4752 3755 

AT 310-454 (3) 30 5262 4070 4846 3725 4267 3300 3677 2881 4907 3813 

AT 310-554 (3) 25 5432 4298 5042 3969 4491 3556 3921 3137 5099 4057 

AT 310-654 (3) 30 5726 4554 5320 4209 4751 3779 4161 3348 5379 4297 

AT 310-754 (3) 30 5899 4758 5498 4435 4948 4037 4389 3635 5555 4518 

AT 310-854 (3) 40 6232 4989 5800 4624 5199 4169 4572 3714 5863 4717 

AT 310-954 (3) 40 6433 5195 5996 4844 5399 4413 4795 3991 6059 4935 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 310-136 (3) 15 3152 2510 2743 3329 2197 2666 2238 2877 1820 2320 

AT 310-236 (3) 25 3352 2633 2889 3548 2292 2802 2339 3041 1879 2422 

AT 310-336 (3) 20 3433 2755 3000 3618 2425 2916 2468 3142 2024 2551 

AT 310-436 (3) 30 3510 2769 3036 3714 2416 2945 2462 3191 1995 2550 

AT 310-536 (3) 25 3657 2950 3205 3850 2607 3118 2653 3356 2185 2738 

AT 310-636 (3) 25 3755 3076 3319 3947 2756 3236 2798 3461 2367 2877 

AT 310-736 (3) 30 3844 3113 3379 4045 2758 3289 2804 3531 2326 2893 

AT 310-836 (3) 30 3951 3239 3493 4153 2903 3407 2947 3642 2500 3031 

AT 310-936 (3) 35 4125 3383 3647 4335 3034 3557 3080 3802 2618 3167 

AT 310-154 (3) 20 4060 3128 3463 4316 2681 3346 2738 3657 2143 2850 

AT 310-254 (3) 15 4262 3450 3742 4486 3065 3643 3114 3914 2605 3210 

AT 310-354 (3) 20 4485 3555 3889 4740 3097 3774 3155 4087 2560 3268 

AT 310-454 (3) 30 4611 3597 3959 4893 3113 3833 3174 4171 2536 3294 

AT 310-554 (3) 25 4816 3840 4194 5086 3363 4077 3428 4398 2789 3551 

AT 310-654 (3) 30 5091 4080 4443 5365 3588 4318 3651 4655 2986 3773 

AT 310-754 (3) 30 5273 4312 4655 5543 3853 4538 3914 4856 3298 4032 

AT 310-854 (3) 40 5556 4484 4871 5849 3964 4739 4035 5099 3324 4163 

AT 310-954 (3) 40 5751 4711 5083 6045 4222 4956 4285 5300 3628 4408 





60 






Inside Unit 

*310-136 thru 110-936 

(3) 8" Inlet 

(3) 8" Outlet 

ACCESS DOOR 

ACCESS DOOR 

ACCESS DOOR 

*310-154 thru 310-954 

(3) 10" Inlet 


7 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

2 

T 

Q 

(3) * BFW/GVD 

INLET 

H 

P 

B 

(3) * BFW/GVD 

OUTLET 

25 1/4 

9 

(3) 3 FPT 

OVERFLOW 

16 7/8 

5 1/4 

(3) 3 FPT 

DRAIN 

7 1/4 

(3) 2 MPT 

3 5/8 

S 

MAKE-UP 

N 

5 1/4 

9' 9-3/4" 

3/8 ✦ 

M 2 1/2 

L 



Weights (LBS) 

Dimensions 

Fan Air 


AT/USS UT† 


M N S&Q 

AT 310-136 21030 37650 U 4750 (3) 15 217,200 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-236 19890 36510 U 4370 (3) 25 260,000 14' 2" 6' 11-3/4" 7' 2-1/4" 10' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-336 21180 37800 U 4800 (3) 20 237,700 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-436 20190 36810 U 4470 (3) 30 275,700 14' 2" 6' 11-3/4" 7' 2-1/4" 10' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-536 21330 37950 U 4850 (3) 25 255,100 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-636 22590 39210 U 5270 (3) 25 251,300 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4"† 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-736 21630 38250 U 4950 (3) 30 270,400 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-836 22890 39510 U 5370 (3) 30 265,900 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4"† 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-936 23640 40260 U 5620 (3) 35 279,100 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 1" 36' 4-1/4" 1' 3-1/4" 3' 3/4"† 11' 11-3/4" 11' 2-3/4" 5' 11-7/8" 

AT 310-154 27270 52490 U 5760 (3) 20 322,300 14' 2" 6' 11-3/4" 7' 2-1/4" 10' 0" 54' 5" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 310-254 31080 56300 U 7030 (3) 15 284,600 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 0" 54' 5" 1' 3-1/4" 3' 3/4"† 18' 0" 17' 3" 9' 0" 

AT 310-354 29340 54560 U 6450 (3) 20 317,000 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 0" 54' 5" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 310-454 27720 52940 U 5910 (3) 30 366,800 14' 2" 6' 11-3/4" 7' 2-1/4" 10' 0" 54' 5" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 310-554 29490 54710 U 6500 (3) 25 340,100 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 0" 54' 5" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 310-654 29790 55010 U 6600 (3) 30 360,000 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 0" 54' 5" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 310-754 31680 56900 U 7230 (3) 30 354,300 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 0" 54' 5" 1' 3-1/4" 3' 3/4"† 18' 0" 17' 3" 9' 0" 

AT 310-854 30540 55760 U 6850 (3) 40 394,100 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 0" 54' 5" 1' 3-1/4" 3' 3/4" 18' 0" 17' 3" 9' 0" 

AT 310-954 32430 57650 U 7480 (3) 40 387,800 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 0" 54' 5" 1' 3-1/4" 3' 3/4"† 18' 0" 17' 3" 9' 0" 








61



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 112-012 15 1339 1029 1231 942 1082 832 929 723 1246 965 

AT 112-112 20 1448 1122 1336 1029 1177 913 1015 799 1352 1053 

AT 112-212 25 1544 1205 1427 1106 1262 985 1093 865 1444 1131 

AT 112-312 20 1558 1240 1448 1147 1294 1031 1134 914 1464 1171 

AT 112-412 30 1625 1275 1505 1172 1335 1046 1158 922 1522 1199 

AT 112-512 20 1602 1293 1493 1205 1344 1097 1192 988 1509 1228 

AT 112-612 25 1667 1334 1551 1236 1390 1115 1223 993 1568 1261 

AT 112-712 30 1762 1416 1642 1314 1474 1188 1300 1062 1659 1341 

AT 112-812 30 1827 1476 1703 1377 1534 1255 1363 1136 1720 1402 

AT 112-912 40 1953 1579 1821 1473 1641 1344 1458 1217 1840 1500 

AT 112-314 30 1780 1386 1644 1273 1453 1133 1257 993 1663 1302 

AT 112-414 25 1818 1447 1690 1338 1510 1203 1323 1067 1708 1366 

AT 112-514 25 1876 1514 1748 1411 1574 1285 1396 1157 1767 1437 

AT 112-614 30 1926 1539 1792 1427 1605 1286 1410 1144 1811 1456 

AT 112-714 30 1992 1608 1856 1499 1671 1366 1484 1234 1876 1527 

AT 112-814 40 2094 1683 1951 1564 1753 1414 1547 1266 1972 1596 

AT 112-914 40 2176 1758 2029 1641 1828 1496 1624 1354 2050 1671 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 112-012 15 1169 907 1001 1242 782 970 800 1056 631 831 

AT 112-112 20 1271 993 1093 1349 861 1059 878 1151 703 911 

AT 112-212 25 1361 1069 1173 1440 931 1137 950 1235 764 983 

AT 112-312 20 1385 1112 1211 1460 978 1177 996 1268 816 1029 

AT 112-412 30 1435 1133 1242 1518 989 1205 1008 1306 818 1044 

AT 112-512 20 1432 1172 1265 1505 1048 1233 1064 1319 897 1096 

AT 112-612 25 1486 1199 1302 1564 1060 1267 1079 1363 889 1113 

AT 112-712 30 1574 1275 1384 1655 1130 1347 1149 1446 955 1186 

AT 112-812 30 1633 1339 1444 1717 1201 1408 1219 1505 1035 1253 

AT 112-912 40 1747 1433 1545 1836 1286 1507 1305 1611 1112 1342 

AT 112-314 30 1567 1229 1350 1659 1069 1309 1091 1421 876 1131 

AT 112-414 25 1617 1297 1413 1704 1142 1373 1162 1480 952 1201 

AT 112-514 25 1677 1372 1481 1763 1227 1444 1246 1545 1051 1283 

AT 112-614 30 1716 1383 1503 1807 1221 1462 1243 1574 1023 1284 

AT 112-714 30 1780 1458 1573 1871 1307 1534 1326 1641 1122 1364 

AT 112-814 40 1871 1518 1645 1967 1346 1603 1369 1720 1138 1412 

AT 112-914 40 1946 1596 1721 2045 1432 1678 1453 1794 1235 1494 





62 





ACCESS DOOR 

Access Doors 

Swing Inside Unit 

*112-012 thru 912 

(1) 8” Inlet 

(1) 8” Outlet 

*112-314 thru 914 

(1) 10” Inlet 

(1) 10” Outlet 

7 

F 

ACCESS 

DOOR 

T 

* BFW/GVD 

INLET 

Q 

H 

2 

2 MPT 

MAKE-UP 

P 

B 

25 1/4 

16 7/8 

7 1/4 

3 5/8 

5 1/4 

9 

3 FPT 

OVERFLOW 

3 FPT 

DRAIN 

S 

* BFW/GVD 

OUTLET 

L 

✦ 3/8 

11' 11-3/4" 



Weights (LBS) 

Dimensions 

Fan Air 

AT/USS UT 



S&Q 

AT 112-012 7440 13650 U 5000 15 81,400 12' 3" 7' 3/4" 5' 2-1/4" 8' 2" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 112-112 7490 13700 U 5050 20 89,300 12' 3" 7' 3/4" 5' 2-1/4" 8' 2" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 112-212 7540 13750 U 5100 25 95,800 12' 3" 7' 3/4" 5' 2-1/4" 8' 2" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 112-312 8030 14240 U 5590 20 87,700 13' 3" 8' 3/4" 5' 2-1/4" 9' 2" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 112-412 7640 13850 U 5200 30 101,500 12' 3" 7' 3/4" 5' 2-1/4" 8' 2" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 112-512 8520 14730 U 6080 20 86,300 14' 3" 9' 3/4" 5' 2-1/4" 10' 2" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 5' 11-7/8" 

AT 112-612 8080 14290 U 5640 25 94,000 13' 3" 8' 3/4" 5' 2-1/4" 9' 2" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 112-712 8180 14390 U 5740 30 99,500 13' 3" 8' 3/4" 5' 2-1/4" 9' 2" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 5' 11-7/8" 

AT 112-812 8670 14880 U 6230 30 97,900 14' 3" 9' 3/4" 5' 2-1/4" 10' 2" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 5' 11-7/8" 

AT 112-912 8920 15130 U 6480 40 107,100 14' 3" 9' 3/4" 5' 2-1/4" 10' 2" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 5' 11-7/8" 

AT 112-314 8270 15600 U 5620 30 110,400 12' 9" 7' 3/4" 5' 8-1/4" 8' 7" 13' 11-3/4" 1' 3-1/4" 3' 3/4" 6' 11-7/8" 

AT 112-414 8860 16190 U 6210 25 102,300 13' 9" 8' 3/4" 5' 8-1/4" 9' 7" 13' 11-3/4" 1' 3-1/4" 3' 3/4" 6' 11-7/8" 

AT 112-514 9380 16710 U 6730 25 100,600 14' 9" 9' 3/4" 5' 8-1/4" 10' 7" 13' 11-3/4" 1' 3-1/4"† 3' 3/4" 6' 11-7/8" 

AT 112-614 8930 16260 U 6280 30 108,300 13' 9" 8' 3/4" 5' 8-1/4" 9' 7" 13' 11-3/4" 1' 3-1/4" 3' 3/4" 6' 11-7/8" 

AT 112-714 9450 16780 U 6800 30 106,600 14' 9" 9' 3/4" 5' 8-1/4" 10' 7" 13' 11-3/4" 1' 3-1/4"† 3' 3/4" 6' 11-7/8" 

AT 112-814 9190 16520 U 6540 40 118,600 13' 9" 8' 3/4" 5' 8-1/4" 9' 7" 13' 11-3/4" 1' 3-1/4" 3' 3/4" 6' 11-7/8" 

AT 112-914 9710 17040 U 7060 40 116,600 14' 9" 9' 3/4" 5' 8-1/4" 10' 7" 13' 11-3/4" 1' 3-1/4"† 3' 3/4" 6' 11-7/8" 







63



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 112-018 25 2099 1620 1931 1483 1700 1312 1464 1144 1955 1518 

AT 112-118 30 2199 1705 2029 1563 1788 1388 1543 1216 2054 1600 

AT 112-218 25 2252 1786 2091 1651 1865 1479 1632 1308 2114 1685 

AT 112-318 30 2367 1885 2200 1744 1967 1568 1724 1392 2224 1780 

AT 112-418 30 2439 1968 2273 1834 2046 1670 1815 1505 2297 1869 

AT 112-518 40 2585 2073 2407 1922 2159 1735 1901 1548 2433 1961 

AT 112-618 40 2674 2160 2493 2015 2245 1836 1994 1662 2519 2053 

AT 112-718 50 2759 2221 2572 2065 2312 1868 2043 1673 2599 2105 

AT 112-818 50 2870 2319 2676 2164 2410 1974 2142 1787 2704 2204 

AT 112-918 60 2978 2407 2776 2246 2501 2049 2223 1856 2805 2287 

AT 112-520 50 2669 2089 2470 1920 2188 1711 1896 1505 2500 1963 

AT 112-620 40 2767 2234 2579 2082 2322 1896 2061 1711 2606 2121 

AT 112-720 50 2897 2324 2699 2156 2421 1946 2132 1738 2728 2200 

AT 112-820 50 2991 2415 2788 2254 2511 2054 2230 1859 2817 2295 

AT 112-920 60 3102 2506 2891 2338 2604 2132 2315 1930 2922 2381 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 112-018 25 1837 1432 1576 1950 1238 1526 1263 1662 1005 1310 

AT 112-118 30 1930 1509 1661 2049 1309 1609 1335 1748 1069 1386 

AT 112-218 25 1999 1598 1742 2109 1402 1693 1429 1827 1164 1477 

AT 112-318 30 2105 1690 1841 2219 1488 1789 1514 1927 1242 1565 

AT 112-418 30 2180 1784 1925 2292 1596 1877 1621 2009 1367 1668 

AT 112-518 40 2306 1865 2026 2428 1652 1971 1679 2118 1389 1732 

AT 112-618 40 2391 1960 2114 2513 1757 2061 1783 2204 1512 1834 

AT 112-718 50 2467 2005 2171 2593 1779 2115 1809 2269 1506 1866 

AT 112-818 50 2567 2106 2270 2698 1889 2214 1917 2366 1632 1971 

AT 112-918 60 2663 2185 2355 2799 1961 2297 1991 2455 1695 2047 

AT 112-520 50 2355 1856 2036 2493 1619 1974 1649 2140 1333 1708 

AT 112-620 40 2474 2025 2185 2600 1814 2130 1841 2280 1554 1894 

AT 112-720 50 2585 2092 2272 2721 1853 2210 1884 2374 1560 1944 

AT 112-820 50 2674 2192 2364 2810 1965 2305 1994 2465 1691 2051 

AT 112-920 60 2774 2275 2452 2915 2040 2391 2070 2557 1759 2129 





64 





Access Doors 


ACCESS DOOR 

7 

F 

2 

T 

Q 

ACCESS 

DOOR 

10 BFW/GROOVED 

INLET 

H 

P 

74 1/4 

2 MPT 

MAKE-UP 

25 1/4 

16 7/8 

8 1/2 

3 5/8 

5 1/4 

9 

3 FPT 

OVERFLOW 

3 FPT 

DRAIN 

S 


OUTLET 

11' 10" 

3/8 

✦ 

L 



Weights (LBS) 

Dimensions 

Fan Air 

AT/USS UT† 


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

S&Q 

AT 112-018 10370 19640 U 6810 25 129,600 13' 3" 7' 3/4" 9' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 9' 0" 

AT 112-118 10480 19750 U 6920 30 137,400 13' 3" 7' 3/4" 9' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 9' 0" 

AT 112-218 11150 20420 U 7590 25 127,400 14' 3" 8' 3/4" 10' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 9' 0" 

AT 112-318 11260 20530 U 7700 30 135,000 14' 3" 8' 3/4" 10' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 9' 0" 

AT 112-418 12000 21270 U 8440 30 132,900 15' 3" 9' 3/4" 11' 1" 18' 0" 1' 3-1/4"† 2' 6-3/4" 9' 0" 

AT 112-518 11520 20790 U 7960 40 147,700 14' 3" 8' 3/4" 10' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 9' 0" 

AT 112-618 12260 21530 U 8700 40 145,300 15' 3" 9' 3/4" 11' 1" 18' 0" 1' 3-1/4"† 2' 6-3/4" 9' 0" 

AT 112-718 11580 20850 U 8020 50 158,500 14' 3" 8' 3/4" 10' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 9' 0" 

AT 112-818 12320 21590 U 8760 50 155,600 15' 3" 9' 3/4" 11' 1" 18' 0" 1' 3-1/4"† 2' 6-3/4" 9' 0" 

AT 112-918 12430 21700 U 8870 60 165,000 15' 3" 9' 3/4" 11' 1" 18' 0" 1' 3-1/4"† 2' 6-3/4" 9' 0" 

AT 112-520 11500 21900 U 7690 50 165,300 13' 3" 7' 3/4" 9' 1" 20' 0" 1' 3-1/4" 2' 6-3/4" 10' 0" 

AT 112-620 13070 23470 U 9260 40 148,800 15' 3" 9' 3/4" 11' 1" 20' 0" 1' 3-1/4"† 2' 6-3/4" 10' 0" 

AT 112-720 12230 22630 U 8420 50 162,200 14' 3" 8' 3/4" 10' 1" 20' 0" 1' 3-1/4" 2' 6-3/4" 10' 0" 

AT 112-820 13130 23530 U 9320 50 159,500 15' 3" 9' 3/4" 11' 1" 20' 0" 1' 3-1/4"† 2' 6-3/4" 10' 0" 

AT 112-920 13240 23640 U 9430 60 169,100 15' 3" 9' 3/4" 11' 1" 20' 0" 1' 3-1/4"† 2' 6-3/4" 10' 0" 







65



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 212-024 (2) 20 2897 2245 2671 2057 2354 1826 2031 1599 2705 2106 

AT 212-124 (2) 15 2877 2274 2669 2099 2377 1879 2073 1658 2700 2146 

AT 212-224 (2) 25 3088 2410 2854 2213 2524 1970 2186 1729 2888 2263 

AT 212-324 (2) 20 3115 2480 2895 2294 2587 2061 2267 1829 2927 2342 

AT 212-424 (2) 30 3250 2549 3009 2344 2670 2091 2315 1843 3044 2398 

AT 212-524 (2) 25 3333 2668 3102 2473 2780 2229 2445 1986 3136 2523 

AT 212-624 (2) 25 3446 2783 3212 2595 2893 2364 2569 2138 3246 2644 

AT 212-724 (2) 30 3524 2831 3284 2629 2949 2375 2600 2123 3319 2682 

AT 212-824 (2) 30 3653 2951 3405 2754 3067 2510 2726 2272 3441 2804 

AT 212-924 (2) 40 3906 3157 3642 2946 3281 2688 2917 2435 3680 3001 

AT 212-128 (2) 25 3378 2617 3114 2398 2744 2128 2367 1863 3154 2455 

AT 212-228 (2) 20 3408 2697 3164 2491 2818 2232 2460 1969 3199 2546 

AT 212-328 (2) 30 3559 2772 3287 2546 2906 2265 2514 1987 3327 2604 

AT 212-428 (2) 25 3637 2895 3380 2677 3020 2405 2646 2134 3417 2733 

AT 212-528 (2) 25 3752 3027 3497 2822 3148 2569 2793 2315 3534 2875 

AT 212-628 (2) 30 3851 3079 3583 2854 3210 2572 2821 2289 3622 2911 

AT 212-728 (2) 30 3983 3216 3712 2999 3343 2732 2968 2469 3751 3055 

AT 212-828 (2) 40 4187 3367 3902 3129 3506 2828 3094 2532 3943 3191 

AT 212-928 (2) 40 4353 3517 4058 3282 3655 2992 3249 2709 4100 3342 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 212-024 (2) 20 2541 1986 2186 2697 1722 2118 1756 2301 1405 1823 

AT 212-124 (2) 15 2549 2031 2219 2693 1777 2157 1811 2327 1472 1876 

AT 212-224 (2) 25 2721 2138 2346 2880 1862 2275 1899 2469 1527 1967 

AT 212-324 (2) 20 2771 2223 2421 2920 1957 2353 1991 2535 1632 2058 

AT 212-424 (2) 30 2870 2266 2484 3036 1979 2410 2016 2611 1635 2088 

AT 212-524 (2) 25 2972 2398 2605 3128 2119 2534 2157 2727 1777 2226 

AT 212-624 (2) 25 3081 2524 2723 3238 2262 2655 2296 2840 1944 2361 

AT 212-724 (2) 30 3147 2551 2767 3311 2261 2695 2299 2892 1909 2372 

AT 212-824 (2) 30 3267 2679 2888 3433 2402 2816 2438 3011 2070 2507 

AT 212-924 (2) 40 3494 2867 3090 3672 2572 3013 2611 3221 2223 2685 

AT 212-128 (2) 25 2963 2315 2549 3145 2007 2468 2047 2683 1638 2124 

AT 212-228 (2) 20 3022 2410 2631 3191 2111 2558 2151 2759 1750 2228 

AT 212-328 (2) 30 3133 2458 2699 3318 2138 2617 2181 2842 1752 2261 

AT 212-428 (2) 25 3234 2595 2826 3409 2283 2746 2324 2959 1905 2402 

AT 212-528 (2) 25 3354 2744 2961 3525 2454 2887 2493 3090 2101 2566 

AT 212-628 (2) 30 3431 2766 3006 3613 2443 2925 2486 3148 2046 2568 

AT 212-728 (2) 30 3561 2916 3147 3743 2613 3068 2653 3282 2244 2728 

AT 212-828 (2) 40 3741 3036 3291 3934 2692 3205 2737 3439 2276 2824 

AT 212-928 (2) 40 3893 3193 3442 4091 2863 3357 2906 3588 2471 2988 





66 





ACCESS DOOR 

Access Doors 


ACCESS DOOR 

*212-024 thru 924 

(2) 8” Inlets 

(2) 8” Outlets 

*212-328 thru 928 



7 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

2 

T 

H 

Q 


INLET 

P 

B 

25 1/4 

16 7/8 

O 

3 5/8 








S 

N 

5 1/4 

(2) 3 FPT 

OVERFLOW 

(2) 2 MPT 

MAKE-UP 

(2) 3 FPT 

DRAIN 


OUTLET 

M 2 1/2 

11' 10" 3/8 ✦ 

L 



Weights (LBS) 

Dimensions 

Fan Air 

AT/USS UT† 



N M O S&Q 

AT 212-024 14940 27360 U 5050 (2) 20 178,300 13' 3" 7' 3/4" 6' 2-1/4" 9' 2" 24' 2" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-124 15920 28340 U 5540 (2) 15 160,100 14' 3" 8' 3/4" 6' 2-1/4" 10' 2" 24' 2" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-224 15040 27460 U 5100 (2) 25 191,500 13' 3" 7' 3/4" 6' 2-1/4" 9' 2" 24' 2" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-324 16020 28440 U 5590 (2) 20 175,300 14' 3" 8' 3/4" 6' 2-1/4" 10' 2" 24' 2" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-424 15240 27660 U 5200 (2) 30 202,900 13' 3" 7' 3/4" 6' 2-1/4" 9' 2" 24' 2" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-524 16120 28540 U 5640 (2) 25 188,000 14' 3" 8' 3/4" 6' 2-1/4" 10' 2" 24' 2" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-624 17100 29520 U 6130 (2) 25 184,800 15' 3" 9' 3/4" 6' 2-1/4" 11' 2" 24' 2" 1' 3-1/4"† 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-724 16320 28740 U 5740 (2) 30 199,000 14' 3" 8' 3/4" 6' 2-1/4" 10' 2" 24' 2" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-824 17300 29720 U 6230 (2) 30 195,700 15' 3" 9' 3/4" 6' 2-1/4" 11' 2" 24' 2" 1' 3-1/4"† 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-924 17800 30220 U 6480 (2) 40 214,300 15' 3" 9' 3/4" 6' 2-1/4" 11' 2" 24' 2" 1' 3-1/4"† 3' 3/4" 11' 2-3/4" 11' 11-3/4" 7-1/4" 5' 11-7/8" 

AT 212-128 16380 31040 U 5550 (2) 25 208,400 14' 3" 7' 3/4" 7' 2-1/4" 10' 1" 28' 2" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

AT 212-228 17580 32240 U 6150 (2) 20 190,900 15' 3" 8' 3/4" 7' 2-1/4" 11' 1" 28' 2" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

AT 212-328 16520 31180 U 5620 (2) 30 220,700 14' 3" 7' 3/4" 7' 2-1/4" 10' 1" 28' 2" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

AT 212-428 17700 32360 U 6210 (2) 25 204,700 15' 3" 8' 3/4" 7' 2-1/4" 11' 1" 28' 2" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

AT 212-528 18740 33400 U 6730 (2) 25 201,200 16' 3" 9' 3/4" 7' 2-1/4" 12' 1" 28' 2" 1' 3-1/4"† 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

AT 212-628 17840 32500 U 6280 (2) 30 216,700 15' 3" 8' 3/4" 7' 2-1/4" 11' 1" 28' 2" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

AT 212-728 18880 33540 U 6800 (2) 30 213,200 16' 3" 9' 3/4" 7' 2-1/4" 12' 1" 28' 2" 1' 3-1/4"† 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

AT 212-828 18360 33020 U 6540 (2) 40 237,200 15' 3" 8' 3/4" 7' 2-1/4" 11' 1" 28' 2" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

AT 212-928 19400 34060 U 7060 (2) 40 233,100 16' 3" 9' 3/4" 7' 2-1/4" 12' 1" 28' 2" 1' 3-1/4"† 3' 3/4" 13' 2-3/4" 13' 11-3/4" 8-1/2" 6' 11-7/8" 

67



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 212-036 (2) 20 4255 3358 3944 3095 3509 2766 3057 2440 3990 3163 

AT 212-136 (2) 30 4399 3410 4058 3126 3576 2776 3086 2432 4108 3200 

AT 212-236 (2) 25 4613 3719 4299 3465 3867 3149 3429 2834 4344 3530 

AT 212-336 (2) 30 4734 3770 4400 3487 3933 3135 3447 2783 4449 3560 

AT 212-436 (2) 30 4878 3936 4546 3669 4093 3341 3631 3011 4594 3738 

AT 212-536 (2) 40 5170 4146 4815 3845 4318 3470 3802 3096 4867 3923 

AT 212-636 (2) 40 5349 4320 4986 4030 4490 3672 3989 3324 5038 4105 

AT 212-736 (2) 50 5518 4443 5144 4131 4624 3737 4086 3346 5198 4211 

AT 212-836 (2) 50 5741 4639 5352 4329 4821 3948 4285 3575 5408 4408 

AT 212-936 (2) 60 5955 4813 5552 4492 5002 4099 4447 3712 5610 4575 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 212-036 (2) 20 3767 2994 3277 3979 2616 3180 2665 3436 2166 2761 

AT 212-136 (2) 30 3860 3018 3321 4097 2617 3218 2670 3496 2137 2771 

AT 212-236 (2) 25 4123 3369 3638 4334 3005 3546 3053 3796 2570 3144 

AT 212-336 (2) 30 4211 3380 3681 4438 2976 3578 3029 3854 2484 3130 

AT 212-436 (2) 30 4360 3567 3850 4583 3191 3754 3242 4017 2733 3336 

AT 212-536 (2) 40 4613 3731 4051 4855 3303 3941 3359 4235 2778 3465 

AT 212-636 (2) 40 4782 3920 4227 5026 3513 4123 3566 4408 3023 3668 

AT 212-736 (2) 50 4933 4009 4343 5186 3559 4230 3618 4537 3012 3732 

AT 212-836 (2) 50 5134 4211 4539 5395 3778 4427 3834 4733 3264 3943 

AT 212-936 (2) 60 5327 4370 4710 5597 3922 4594 3981 4911 3391 4093 





68 





Access Doors 


ACCESS DOOR 

ACCESS DOOR 

7 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

T 

2 

H 

108 


INLET 

P 

86 1/4 

11'-10" 3/8 

✦ 

25 1/4 

16 7/8 

8 1/2 

3 5/8 

108 

207 

5 1/4 

216 2 1/2 

36'-2 1/2" 

(2) 3 FPT 

OVERFLOW 

(2) 2 MPT 

MAKE-UP 

(2) 3 FPT 

DRAIN 


OUTLET 



Weights (LBS) 

Dimensions 

Fan Air 


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

AT 212-036 22460 41000 U 7540 (2) 20 237,300 15' 3" 8' 3/4" 11' 1" 1' 3-1/4" 2' 6-3/4" 

AT 212-136 21220 39760 U 6920 (2) 30 274,700 14' 3" 7' 3/4" 10' 1" 1' 3-1/4" 2' 6-3/4" 

AT 212-236 24040 42580 U 8330 (2) 25 250,800 16' 3" 9' 3/4" 12' 1" 1' 3-1/4"† 2' 6-3/4" 

AT 212-336 22780 41320 U 7700 (2) 30 270,100 15' 3" 8' 3/4" 11' 1" 1' 3-1/4" 2' 6-3/4" 

AT 212-436 24260 42800 U 8440 (2) 30 265,800 16' 3" 9' 3/4" 12' 1" 1' 3-1/4"† 2' 6-3/4" 

AT 212-536 23300 41840 U 7960 (2) 40 295,500 15' 3" 8' 3/4" 11' 1" 1' 3-1/4" 2' 6-3/4" 

AT 212-636 24780 43320 U 8700 (2) 40 290,700 16' 3" 9' 3/4" 12' 1" 1' 3-1/4"† 2' 6-3/4" 

AT 212-736 23420 41960 U 8020 (2) 50 317,100 15' 3" 8' 3/4" 11' 1" 1' 3-1/4" 2' 6-3/4" 

AT 212-836 24900 43440 U 8760 (2) 50 311,400 16' 3" 9' 3/4" 12' 1" 1' 3-1/4"† 2' 6-3/4" 

AT 212-936 25120 43660 U 8870 (2) 60 329,900 16' 3" 9' 3/4" 12' 1" 1' 3-1/4"† 2' 6-3/4" 








AT/USS 

F 

UT† 

69



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 312-036 (3) 20 4393 3408 4054 3125 3574 2776 3084 2433 4103 3199 

AT 312-136 (3) 15 4360 3449 4047 3185 3604 2854 3146 2517 4092 3256 

AT 312-236 (3) 25 4681 3658 4328 3359 3830 2991 3317 2628 4380 3435 

AT 312-336 (3) 20 4720 3760 4388 3479 3923 3128 3439 2778 4436 3552 

AT 312-436 (3) 20 4854 3916 4524 3651 4073 3324 3613 2996 4571 3719 

AT 312-536 (3) 25 5048 4045 4700 3748 4213 3381 3707 3013 4750 3824 

AT 312-636 (3) 25 5219 4215 4865 3931 4381 3582 3891 3241 4916 4005 

AT 312-736 (3) 30 5338 4290 4974 3985 4468 3602 3941 3223 5026 4066 

AT 312-836 (3) 30 5533 4470 5158 4171 4645 3802 4129 3442 5212 4248 

AT 312-936 (3) 40 5916 4782 5516 4462 4969 4072 4417 3688 5574 4545 

AT 312-042 (3) 15 4806 3784 4449 3482 3954 3104 3440 2733 4500 3559 

AT 312-142 (3) 25 5123 3972 4726 3642 4166 3235 3595 2834 4784 3729 

AT 312-242 (3) 15 4928 3965 4590 3688 4125 3342 3648 3001 4639 3761 

AT 312-342 (3) 20 5165 4090 4795 3780 4274 3386 3734 2990 4848 3860 

AT 312-442 (3) 25 5509 4388 5121 4060 4578 3650 4013 3241 5178 4145 

AT 312-542 (3) 25 5683 4586 5296 4275 4769 3892 4231 3508 5352 4355 

AT 312-642 (3) 30 5833 4668 5429 4326 4865 3900 4278 3473 5487 4414 

AT 312-742 (3) 30 6032 4871 5623 4543 5063 4138 4496 3742 5682 4628 

AT 312-842 (3) 40 6342 5102 5911 4743 5312 4289 4690 3839 5973 4836 

AT 312-942 (3) 40 6593 5327 6146 4971 5536 4532 4920 4104 6210 5062 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 312-036 (3) 20 3856 3017 3318 4092 2617 3216 2669 3493 2138 2771 

AT 312-136 (3) 15 3865 3082 3366 4082 2699 3272 2750 3529 2238 2850 

AT 312-236 (3) 25 4127 3248 3561 4368 2830 3453 2884 3747 2323 2986 

AT 312-336 (3) 20 4199 3372 3672 4425 2969 3569 3022 3844 2479 3123 

AT 312-436 (3) 20 4338 3550 3831 4560 3176 3735 3227 3997 2720 3320 

AT 312-536 (3) 25 4502 3637 3949 4739 3216 3842 3272 4132 2699 3376 

AT 312-636 (3) 25 4666 3823 4125 4905 3426 4022 3478 4301 2946 3577 

AT 312-736 (3) 30 4768 3867 4193 5015 3429 4085 3486 4382 2897 3597 

AT 312-836 (3) 30 4947 4058 4374 5199 3638 4266 3693 4560 3138 3797 

AT 312-936 (3) 40 5292 4342 4679 5561 3897 4564 3955 4879 3368 4067 

AT 312-042 (3) 15 4249 3369 3686 4489 2936 3577 2992 3872 2429 3099 

AT 312-142 (3) 25 4496 3516 3868 4771 3050 3749 3111 4072 2491 3229 

AT 312-242 (3) 15 4399 3581 3878 4628 3186 3779 3238 4048 2717 3338 

AT 312-342 (3) 20 4581 3657 3991 4836 3206 3879 3268 4185 2660 3381 

AT 312-442 (3) 25 4901 3935 4285 5165 3465 4165 3526 4486 2892 3645 

AT 312-542 (3) 25 5080 4156 4486 5340 3719 4374 3778 4680 3186 3887 

AT 312-642 (3) 30 5200 4195 4558 5474 3707 4434 3773 4771 3108 3894 

AT 312-742 (3) 30 5393 4418 4767 5668 3959 4648 4019 4970 3402 4133 

AT 312-842 (3) 40 5668 4602 4987 5959 4083 4857 4152 5212 3453 4283 

AT 312-942 (3) 40 5896 4836 5213 6196 4337 5084 4402 5435 3745 4527 





70 





Access Doors 


*312-036 thru 936 



ACCESS DOOR 

ACCESS DOOR 

ACCESS DOOR 

*312-042 thru 942 



7 

F 

T 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

2 

H 

Q 

*(3) BFW/GROOVED 

INLET 

P 

B 

25 1/4 

16 7/8 

O 

3 5/8 

N 

5 1/4 

M 2 1/2 

*(3) BFW/GROOVED 

OUTLET 

(3) 3 FPT 

OVERFLOW 

(3) 2 MPT 

MAKE-UP 








S 

11' 10" 3/8 ✦ 

L 



Weights (LBS) 

Dimensions 

Fan Air 


AT/USS UT† 


N M S&Q 

AT 312-036 22260 40890 5050 (3) 20 270,400 14' 3" 7' 3/4" 7' 2-1/4" 10' 2" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-136 23730 42360 5540 (3) 15 242,600 15' 3" 8' 3/4" 7' 2-1/4" 11' 2" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-236 22410 41040 5100 (3) 25 290,000 14' 3" 7' 3/4" 7' 2-1/4" 10' 2" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-336 23880 42510 5590 (3) 20 265,500 15' 3" 8' 3/4" 7' 2-1/4" 11' 2" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-436 25350 43980 6080 (3) 20 261,400 16' 3" 9' 3/4" 7' 2-1/4" 12' 2" 36' 4-1/4" 1' 3-1/4"† 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-536 24030 42660 5640 (3) 25 284,700 15' 3" 8' 3/4" 7' 2-1/4" 11' 2" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-636 25500 44130 6130 (3) 25 280,100 16' 3" 9' 3/4" 7' 2-1/4" 12' 2" 36' 4-1/4" 1' 3-1/4"† 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-736 24330 42960 5740 (3) 30 301,300 15' 3" 8' 3/4" 7' 2-1/4" 11' 2" 36' 4-1/4" 1' 3-1/4" 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-836 25800 44430 6230 (3) 30 296,400 16' 3" 9' 3/4" 7' 2-1/4" 12' 2" 36' 4-1/4" 1' 3-1/4"† 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-936 26550 45180 6480 (3) 40 324,500 16' 3" 9' 3/4" 7' 2-1/4" 12' 2" 36' 4-1/4" 1' 3-1/4"† 3' 3/4" 11' 2-3/4" 11' 11-3/4" 5' 11-7/8" 

AT 312-042 26790 48780 6090 (3) 15 263,400 16' 3" 8' 3/4" 8' 2-1/4" 12' 1" 42' 4-1/4" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-142 25170 47160 5550 (3) 25 315,200 15' 3" 7' 3/4" 8' 2-1/4" 11' 1" 42' 4-1/4" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-242 28350 50340 6610 (3) 15 259,100 17' 3" 9' 3/4" 8' 2-1/4" 13' 1" 42' 4-1/4" 1' 3-1/4"† 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-342 26970 48960 6150 (3) 20 288,500 16' 3" 8' 3/4" 8' 2-1/4" 12' 1" 42' 4-1/4" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-442 27150 49140 6210 (3) 25 309,500 16' 3" 8' 3/4" 8' 2-1/4" 12' 1" 42' 4-1/4" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-542 28710 50700 6730 (3) 25 304,600 17' 3" 9' 3/4" 8' 2-1/4" 13' 1" 42' 4-1/4" 1' 3-1/4"† 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-642 27360 49350 6280 (3) 30 327,600 16' 3" 8' 3/4" 8' 2-1/4" 12' 1" 42' 4-1/4" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-742 28920 50910 6800 (3) 30 322,400 17' 3" 9' 3/4" 8' 2-1/4" 13' 1" 42' 4-1/4" 1' 3-1/4"† 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-842 28140 50130 6540 (3) 40 359,100 16' 3" 8' 3/4" 8' 2-1/4" 12' 1" 42' 4-1/4" 1' 3-1/4" 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

AT 312-942 29700 51690 7060 (3) 40 352,800 17' 3" 9' 3/4" 8' 2-1/4" 13' 1" 42' 4-1/4" 1' 3-1/4"† 3' 3/4" 13' 2-3/4" 13' 11-3/4" 6' 11-7/8" 

9 

5 1/4 

(3) 3 FPT 

DRAIN 

71



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 312-054 (3) 30 6635 5146 6122 4719 5397 4192 4658 3674 6196 4831 

AT 312-154 (3) 25 6791 5386 6305 4979 5625 4464 4923 3947 6375 5083 

AT 312-254 (3)40 7231 5663 6694 5204 5930 4639 5140 4083 6773 5323 

AT 312-354 (3) 30 7136 5685 6634 5260 5931 4730 5199 4201 6707 5370 

AT 312-454 (3) 30 7352 5933 6852 5531 6169 5036 5474 4540 6924 5634 

AT 312-554 (3) 40 7792 6251 7258 5798 6511 5233 5734 4671 7337 5916 

AT 312-654 (3) 40 8062 6512 7515 6075 6768 5536 6013 5010 7594 6188 

AT 312-754 (3) 50 8318 6699 7753 6228 6971 5635 6162 5047 7834 6349 

AT 312-854 (3) 50 8652 6992 8067 6525 7266 5951 6459 5389 8151 6645 

AT 312-954 (3) 60 8976 7255 8369 6771 7540 6178 6702 5596 8456 6895 

AT 312-260 (3) 25 6833 5372 6323 4944 5618 4404 4884 3876 6396 5053 

AT 312-360 (3) 25 7030 5656 6547 5259 5884 4765 5202 4279 6617 5363 

AT 312-460 (3) 50 7964 6232 7369 5724 6525 5101 5654 4486 7457 5855 

AT 312-560 (3) 40 8027 6399 7464 5924 6677 5331 5856 4740 7546 6048 

AT 312-660 (3) 40 8262 6668 7700 6216 6933 5660 6152 5105 7781 6332 

AT 312-760 (3) 50 8648 6938 8056 6434 7226 5807 6363 5183 8142 6564 

AT 312-860 (3) 50 8928 7211 8322 6727 7495 6130 6658 5548 8410 6853 

AT 312-960 (3) 60 9260 7481 8632 6980 7775 6363 6910 5760 8722 7109 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 312-054 (3) 30 5823 4556 5011 6180 3952 4858 4031 5275 3228 4185 

AT 312-154 (3) 25 6029 4821 5255 6359 4234 5108 4314 5512 3515 4457 

AT 312-254 (3) 40 6383 5032 5520 6756 4390 5351 4473 5801 3618 4632 

AT 312-354 (3) 30 6348 5098 5552 6691 4490 5396 4570 5812 3749 4723 

AT 312-454 (3) 30 6572 5378 5804 6908 4812 5659 4889 6055 4122 5029 

AT 312-554 (3) 40 6953 5626 6109 7319 4982 5943 5066 6385 4193 5226 

AT 312-654 (3) 40 7208 5908 6372 7576 5296 6214 5376 6644 4559 5529 

AT 312-754 (3) 50 7436 6046 6547 7816 5367 6377 5458 6840 4544 5627 

AT 312-854 (3) 50 7738 6348 6842 8132 5695 6673 5780 7134 4921 5943 

AT 312-954 (3) 60 8029 6587 7100 8437 5913 6925 6001 7402 5111 6170 

AT 312-260 (3) 25 6036 4785 5234 6380 4167 5079 4245 5502 3445 4397 

AT 312-360 (3) 25 6275 5106 5532 6601 4542 5388 4616 5773 3873 4759 

AT 312-460 (3) 50 7026 5535 6070 7437 4827 5885 4918 6383 3971 5092 

AT 312-560 (3) 40 7143 5742 6249 7528 5060 6078 5150 6543 4228 5323 

AT 312-660 (3) 40 7385 6044 6523 7763 5412 6360 5496 6805 4637 5653 

AT 312-760 (3) 50 7717 6243 6779 8123 5528 6595 5621 7086 4651 5799 

AT 312-860 (3) 50 7983 6543 7056 8390 5864 6882 5953 7358 5047 6122 

AT 312-960 (3) 60 8280 6791 7320 8702 6089 7139 6180 7633 5250 6355 





72 





ACCESS DOOR 

ACCESS DOOR 

Access Doors 


ACCESS DOOR 

7 

F 

T 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

2 

H 

Q 


INLET 

P 

86 1/4 

25 1/4 

16 7/8 

8 1/2 

3 5/8 

S 

N 

5 1/4 

9 

5 1/4 

M 2 1/2 


OUTLET 

(3) 3 FPT 

OVERFLOW 

11' 10" 3/8 ✦ 

L 



Weights (LBS) 

Dimensions 

Fan Air 


AT/USS UT† 

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

N M S&Q 

AT 312-054 32280 60090 U 6920 (3) 30 412,300 15' 3" 7' 3/4" 11' 1" 54' 5" 1' 3-1/4" 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-154 34290 62100 U 7590 (3) 25 382,300 16' 3" 8' 3/4" 12' 1" 54' 5" 1' 3-1/4" 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-254 33060 60870 U 7180 (3) 40 451,700 15' 3" 7' 3/4" 11' 1" 54' 5" 1' 3-1/4" 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-354 34620 62430 U 7700 (3) 30 405,300 16' 3" 8' 3/4" 12' 1" 54' 5" 1' 3-1/4" 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-454 36840 64650 U 8440 (3) 30 398,900 17' 3" 9' 3/4" 13' 1" 54' 5" 1' 3-1/4"† 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-554 35400 63210 U 7960 (3) 40 443,500 16' 3" 8' 3/4" 12' 1" 54' 5" 1' 3-1/4" 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-654 37620 65430 U 8700 (3) 40 436,200 17' 3" 9' 3/4" 13' 1" 54' 5" 1' 3-1/4"† 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-754 35580 63390 U 8020 (3) 50 475,900 16' 3" 8' 3/4" 12' 1" 54' 5" 1' 3-1/4" 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-854 37800 65610 U 8760 (3) 50 467,400 17' 3" 9' 3/4" 13' 1" 54' 5" 1' 3-1/4"† 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-954 38130 65940 U 8870 (3) 60 495,100 17' 3" 9' 3/4" 13' 1" 54' 5" 1' 3-1/4"† 2' 6-3/4" 17' 3" 18' 0" 9' 0" 

AT 312-260 36300 67500 U 7990 (3) 25 390,100 16' 3" 8' 3/4" 12' 1" 60' 5" 1' 3-1/4" 2' 6-3/4" 19' 3" 20' 0" 10' 0"" 

AT 312-360 39000 70200 U 8890 (3) 25 383,700 17' 3" 9' 3/4" 13' 1" 60' 5" 1' 3-1/4"† 2' 6-3/4" 19' 3" 20' 0" 10' 0" 

AT 312-460 35400 66600 U 7690 (3) 50 493,600 15' 3" 7' 3/4" 11' 1" 60' 5" 1' 3-1/4" 2' 6-3/4" 19' 3" 20' 0" 10' 0" 

AT 312-560 37410 68610 U 8360 (3) 40 451,400 16' 3" 8' 3/4" 12' 1" 60' 5" 1' 3-1/4" 2' 6-3/4" 19' 3" 20' 0" 10' 0" 

AT 312-660 40110 71310 U 9260 (3) 40 444,400 17' 3" 9' 3/4" 13' 1" 60' 5" 1' 3-1/4"† 2' 6-3/4" 19' 3" 20' 0" 10' 0" 

AT 312-760 37590 68790 U 8420 (3) 50 484,000 16' 3" 8' 3/4" 12' 1" 60' 5" 1' 3-1/4" 2' 6-3/4" 19' 3" 20' 0" 10' 0" 

AT 312-860 40290 71490 U 9320 (3) 50 476,100 17' 3" 9' 3/4" 13' 1" 60' 5" 1' 3-1/4"† 2' 6-3/4" 19' 3" 20' 0" 10' 0" 

AT 312-960 40620 71820 U 9430 (3) 60 504,600 17' 3" 9' 3/4" 13' 1" 60' 5" 1' 3-1/4"† 2' 6-3/4" 19' 3" 20' 0" 10' 0" 

(3) 3 FPT 

DRAIN 

(3) 2 MPT 

MAKE-UP 








73



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 220-112 (2) 15 2401 1900 2229 1754 1985 1572 1733 1387 2253 1793 

AT 220-212 (2) 25 2569 2008 2375 1843 2102 1641 1820 1442 2404 1885 

AT 220-312 (2) 20 2604 2075 2421 1920 2165 1727 1898 1535 2448 1961 

AT 220-412 (2) 30 2684 2106 2486 1937 2206 1728 1913 1524 2514 1981 

AT 220-512 (2) 25 2768 2217 2576 2055 2310 1853 2032 1651 2604 2096 

AT 220-612 (2) 25 2834 2288 2641 2134 2378 1944 2112 1758 2669 2174 

AT 220-712 (2) 30 2905 2333 2707 2167 2430 1958 2143 1750 2735 2211 

AT 220-812 (2) 30 2981 2408 2779 2247 2503 2048 2224 1853 2808 2288 

AT 220-912 (2) 35 3111 2514 2900 2346 2613 2139 2322 1937 2931 2389 

AT 220-118 (2) 20 3138 2403 2880 2190 2524 1928 2160 1674 2917 2245 

AT 220-218 (2) 15 3215 2578 2993 2393 2687 2164 2367 1940 3025 2440 

AT 220-318 (2) 20 3415 2690 3162 2475 2810 2207 2445 1944 3199 2530 

AT 220-418 (2) 30 3543 2742 3265 2511 2875 2226 2479 1946 3306 2571 

AT 220-518 (2) 25 3655 2894 3393 2674 3024 2396 2642 2115 3431 2732 

AT 220-618 (2) 30 3852 3065 3580 2834 3198 2546 2802 2258 3619 2894 

AT 220-718 (2) 30 3968 3201 3698 2983 3328 2716 2952 2446 3736 3039 

AT 220-818 (2) 40 4191 3358 3902 3112 3498 2807 3078 2502 3944 3175 

AT 220-918 (2) 40 4326 3494 4033 3258 3631 2969 3225 2686 4075 3319 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 220-112 (2) 15 2128 1697 1854 2248 1487 1802 1515 1944 1233 1570 

AT 220-212 (2) 25 2265 1782 1954 2397 1553 1895 1583 2056 1275 1639 

AT 220-312 (2) 20 2317 1861 2027 2442 1640 1970 1669 2122 1369 1725 

AT 220-412 (2) 30 2371 1873 2053 2508 1635 1992 1666 2158 1352 1726 

AT 220-512 (2) 25 2468 1993 2165 2598 1763 2106 1794 2265 1479 1850 

AT 220-612 (2) 25 2533 2075 2239 2663 1860 2183 1888 2335 1598 1941 

AT 220-712 (2) 30 2594 2102 2281 2729 1863 2221 1895 2383 1574 1955 

AT 220-812 (2) 30 2665 2185 2356 2801 1959 2298 1989 2457 1688 2045 

AT 220-912 (2) 35 2782 2282 2460 2924 2047 2399 2078 2565 1768 2136 

AT 220-118 (2) 20 2736 2110 2336 2909 1810 2258 1849 2465 1449 1925 

AT 220-218 (2) 15 2867 2322 2518 3018 2063 2452 2096 2634 1754 2161 

AT 220-318 (2) 20 3020 2395 2620 3190 2088 2543 2127 2752 1727 2203 

AT 220-418 (2) 30 3106 2425 2669 3297 2100 2585 2141 2811 1712 2222 

AT 220-518 (2) 25 3242 2587 2824 3422 2268 2745 2311 2961 1881 2392 

AT 220-618 (2) 30 3425 2747 2992 3610 2417 2908 2460 3134 2015 2542 

AT 220-718 (2) 30 3546 2901 3131 3728 2593 3053 2634 3267 2220 2713 

AT 220-818 (2) 40 3738 3019 3279 3935 2671 3190 2717 3431 2241 2803 

AT 220-918 (2) 40 3868 3169 3419 4065 2840 3334 2883 3565 2442 2965 





74 





ACCESS DOOR 

*220-112 thru 220-912 

(2) 8" Inlet 

(2) 8" Outlet 

ACCESS DOOR 


Inside Unit 

*220-118 thru 220-918 

(2) 10" Inlet 


ACCESS DOOR 

7 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

T 

* (2) 10 BFW/GVD 

INLET 

58 7/8 

2 

H 

P 

B 

(2) 3 FPT 

* (2) 10 BFW/GVD 

OVERFLOW 

OUTLET 

(2) 2 MPT 

MAKE-UP 

93 5/8 25 1/4 

(2) 3 FPT 

108 3/4 

16 7/8 

DRAIN 

112 1/2 

8 1/2 

113 1/2 

5 1/8 

117 3/4 

3 3/4 

20' 5/8" 3/8 

L 



Weights (LBS) 

Dimensions 

Fan Air 



AT 220-112 14000 25080 U 4750 (2) 15 143,900 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 

AT 220-212 13240 24320 U 4370 (2) 25 172,300 13' 2" 6' 11-3/4" 6' 2-1/4" 9' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 

AT 220-312 14100 25180 U 4800 (2) 20 157,400 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 

AT 220-412 13440 24520 U 4470 (2) 30 182,600 13' 2" 6' 11-3/4" 6' 2-1/4" 9' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 

AT 220-512 14200 25280 U 4850 (2) 25 169,100 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 

AT 220-612 15040 26120 U 5270 (2) 25 166,300 15' 2" 8' 11-3/4" 6' 2-1/4" 11' 1" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 

AT 220-712 14400 25480 U 4950 (2) 30 179,000 14' 2" 7' 11-3/4" 6' 2-1/4" 10' 1" 11' 11-3/4" 1' 3-1/4" 3' 3/4" 

AT 220-812 15240 26320 U 5370 (2) 30 176,300 15' 2" 8' 11-3/4" 6' 2-1/4" 11' 1" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 

AT 220-912 15740 26820 U 5620 (2) 35 185,000 15' 2" 8' 11-3/4" 6' 2-1/4" 11' 1" 11' 11-3/4" 1' 3-1/4"† 3' 3/4" 

AT 220-118 18060 34870 U 5760 (2) 20 213,600 14' 2" 6' 11-3/4" 7' 2-1/4" 10' 0" 18' 0" 1' 3-1/4" 3' 3/4" 

AT 220-218 20600 37410 U 7030 (2) 15 188,600 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 0" 18' 0" 1' 3-1/4"† 3' 3/4" 

AT 220-318 19440 36250 U 6450 (2) 20 210,000 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 0" 18' 0" 1' 3-1/4" 3' 3/4" 

AT 220-418 18360 35170 U 5910 (2) 30 243,000 14' 2" 6' 11-3/4" 7' 2-1/4" 10' 0" 18' 0" 1' 3-1/4" 3' 3/4" 

AT 220-518 19540 36350 U 6500 (2) 25 225,200 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 0" 18' 0" 1' 3-1/4" 3' 3/4" 

AT 220-618 19740 36550 U 6600 (2) 30 238,600 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 0" 18' 0" 1' 3-1/4" 3' 3/4" 

AT 220-718 21000 37810 U 7230 (2) 30 234,800 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 0" 18' 0" 1' 3-1/4"† 3' 3/4" 

AT 220-818 20240 37050 U 6850 (2) 40 261,000 15' 2" 7' 11-3/4" 7' 2-1/4" 11' 0" 18' 0" 1' 3-1/4" 3' 3/4" 

AT 220-918 21500 38310 U 7480 (2) 40 256,800 16' 2" 8' 11-3/4" 7' 2-1/4" 12' 1/4" 18' 0"" 1' 3-1/4"† 3' 3/4" 








✦ 

AT/USS 

F 

UT† 

75



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 420-124 (4) 15 4777 3778 4433 3488 3948 3126 3446 2756 4484 3566 

AT 420-224 (4) 25 5110 3991 4724 3664 4179 3262 3619 2865 4781 3747 

AT 420-324 (4) 20 5183 4128 4818 3819 4307 3434 3776 3050 4871 3900 

AT 420-424 (4) 30 5340 4188 4945 3851 4386 3435 3803 3027 5002 3939 

AT 420-524 (4) 25 5508 4410 5127 4087 4595 3685 4042 3283 5182 4170 

AT 420-624 (4) 25 5640 4554 5257 4246 4733 3868 4203 3497 5312 4326 

AT 420-724 (4) 30 5781 4643 5387 4310 4836 3893 4262 3480 5444 4398 

AT 420-824 (4) 30 5933 4792 5531 4472 4981 4075 4426 3688 5588 4554 

AT 420-924 (4) 35 6192 5003 5773 4669 5200 4257 4622 3854 5833 4755 

AT 420-136 (4) 20 6059 4622 5553 4208 4861 3693 4151 3187 5625 4313 

AT 420-236 (4) 15 6240 4994 5806 4633 5205 4188 4582 3751 5869 4728 

AT 420-336 (4) 20 6615 5190 6122 4778 5435 4249 4720 3735 6192 4883 

AT 420-436 (4) 30 6851 5284 6302 4836 5545 4277 4775 3726 6381 4950 

AT 420-536 (4) 25 7085 5597 6570 5161 5848 4617 5098 4073 6646 5275 

AT 420-636 (4) 30 7473 5929 6939 5481 6191 4914 5418 4346 7016 5595 

AT 420-736 (4) 30 7704 6211 7179 5788 6460 5263 5728 4739 7254 5897 

AT 420-836 (4) 40 8137 6501 7570 6024 6781 5428 5954 4830 7651 6147 

AT 420-936 (4) 40 8401 6783 7830 6324 7050 5760 6259 5203 7912 6442 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 420-124 (4) 15 4234 3375 3687 4473 2955 3584 3011 3866 2450 3121 

AT 420-224 (4) 25 4505 3542 3885 4768 3085 3767 3146 4088 2531 3257 

AT 420-324 (4) 20 4610 3702 4031 4859 3260 3919 3318 4221 2722 3429 

AT 420-424 (4) 30 4717 3723 4082 4989 3250 3960 3311 4290 2686 3430 

AT 420-524 (4) 25 4912 3964 4306 5170 3504 4189 3567 4507 2939 3680 

AT 420-624 (4) 25 5042 4130 4456 5299 3700 4345 3756 4647 3179 3863 

AT 420-724 (4) 30 5162 4182 4538 5431 3706 4418 3768 4742 3129 3888 

AT 420-824 (4) 30 5305 4349 4690 5575 3899 4574 3957 4890 3358 4070 

AT 420-924 (4) 35 5538 4542 4896 5820 4074 4775 4135 5105 3517 4252 

AT 420-136 (4) 20 5270 4057 4487 5609 3470 4337 3543 4749 2765 3686 

AT 420-236 (4) 15 5563 4495 4879 5855 3991 4749 4058 5103 3392 4182 

AT 420-336 (4) 20 5839 4615 5057 6176 4019 4908 4096 5318 3316 4242 

AT 420-436 (4) 30 5994 4667 5138 6363 4035 4977 4116 5421 3267 4270 

AT 420-536 (4) 25 6276 4993 5461 6629 4365 5303 4448 5726 3616 4609 

AT 420-636 (4) 30 6636 5308 5784 6998 4662 5623 4749 6067 3871 4907 

AT 420-736 (4) 30 6885 5628 6076 7237 5023 5923 5103 6340 4298 5256 

AT 420-836 (4) 40 7247 5838 6348 7633 5154 6176 5245 6646 4315 5421 

AT 420-936 (4) 40 7510 6150 6636 7893 5510 6470 5593 6921 4730 5753 





76 




Four-Cell Cooling Towers 

ACCESS DOOR 


Inside Unit 

ACCESS DOOR 

*420-124 thru 420-924 

(4) 8" Inlet 


*420-136 thru 420-936 

(4) 10" Inlet 


7 

ACCESS DOOR ACCESS DOOR 

F 

T 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

* (4) 8 BFW/GVD 

INLET 

58 7/8 

2 

H 

P 

B 

(2) 3 FPT OVERFLOW 

(2) 2MPT MAKE-UP 

(2) 3FPT DRAIN 

5 1/8 

20' 5/8" 

* (2) 12 BFW/GVD 

OUTLET 

93 5/8 25 1/4 

108 3/4 

16 7/8 

112 1/2 

9 1/2 

113 1/2 

3 3/4 

117 3/4 

✦ 3/8 

L 



Weights (LBS) 

Dimensions 

Fan Air 



AT 420-124 27700 49840 U 4750 (4) 15 286,500 16' 2" 7' 11-3/4" 8' 2-1/4" 12' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 420-224 26180 48320 U 4370 (4) 25 343,000 15' 2" 6' 11-3/4" 8' 2-1/4" 11' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 420-324 27900 50040 U 4800 (4) 20 313,600 16' 2" 7' 11-3/4" 8' 2-1/4" 12' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 420-424 26580 48720 U 4470 (4) 30 363,600 15' 2" 6' 11-3/4" 8' 2-1/4" 11' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 420-524 28100 50240 U 4850 (4) 25 336,500 16' 2" 7' 11-3/4" 8' 2-1/4" 12' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 420-624 29780 51920 U 5270 (4) 25 331,400 17' 2" 8' 11-3/4" 8' 2-1/4" 13' 1" 24' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 420-724 28500 50640 U 4950 (4) 30 356,600 16' 2" 7' 11-3/4" 8' 2-1/4" 12' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 420-824 30180 52320 U 5370 (4) 30 350,900 17' 2" 8' 11-3/4" 8' 2-1/4" 13' 1" 24' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 420-924 31180 53320 U 5620 (4) 35 368,000 17' 2" 8' 11-3/4" 8' 2-1/4" 13' 1" 24' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 420-136 35780 69740 L 6370 (4) 20 412,300 15' 2" 6' 11-3/4" 8' 2-1/4" 11' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 

AT 420-236 40860 74820 U 7030 (4) 15 364,200 17' 2" 8' 11-3/4" 8' 2-1/4" 13' 0" 36' 2-1/2" 1' 3-1/4"† 3' 3/4" 

AT 420-336 38540 72500 U 6450 (4) 20 405,800 16' 2" 7' 11-3/4" 8' 2-1/4" 12' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 

AT 420-436 36380 70340 L 6370 (4) 30 469,300 15' 2" 6' 11-3/4" 8' 2-1/4" 11' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 

AT 420-536 38740 72700 U 6500 (4) 25 435,200 16' 2" 7' 11-3/4" 8' 2-1/4" 12' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 

AT 420-636 39140 73100 U 6600 (4) 30 460,900 16' 2" 7' 11-3/4" 8' 2-1/4" 12' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 

AT 420-736 41660 75620 U 7230 (4) 30 453,400 17' 2" 8' 11-3/4" 8' 2-1/4" 13' 0" 36' 2-1/2" 1' 3-1/4"† 3' 3/4" 

AT 420-836 40140 74100 U 6850 (4) 40 504,500 16' 2" 7' 11-3/4" 8' 2-1/4" 12' 0" 36' 2-1/2" 1' 3-1/4" 3' 3/4" 

AT 420-936 42660 76620 U 7480 (4) 40 496,200 17' 2" 8' 11-3/4" 8' 2-1/4" 13' 0" 36' 2-1/2" 1' 3-1/4"† 3' 3/4" 





(5) These models are available as (4) independent operating cells with the addition of water tight basin partitions and flume plate. Consult the factory for details. 



77 

AT/USS 

F 

UT†



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 224-018 (2) 25 4197 3241 3862 2966 3399 2625 2928 2289 3911 3036 

AT 224-118 (2) 30 4399 3410 4058 3126 3576 2776 3086 2432 4108 3200 

AT 224-218 (2) 25 4505 3571 4182 3301 3730 2959 3263 2615 4228 3370 

AT 224-318 (2) 40 4795 3754 4438 3449 3931 3074 3406 2704 4491 3527 

AT 224-418 (2) 30 4734 3770 4400 3487 3933 3135 3447 2783 4449 3560 

AT 224-518 (2) 30 4878 3936 4546 3669 4093 3341 3631 3011 4594 3738 

AT 224-618 (2) 40 5170 4146 4815 3845 4318 3470 3802 3096 4867 3923 

AT 224-718 (2) 50 5518 4443 5144 4131 4624 3737 4086 3346 5198 4211 

AT 224-818 (2) 50 5741 4639 5352 4329 4821 3948 4285 3575 5408 4408 

AT 224-918 (2) 60 5955 4813 5552 4492 5002 4099 4447 3712 5610 4575 

AT 224-720 (2) 40 5427 4379 5058 4082 4554 3717 4040 3350 5111 4159 

AT 224-820 (2) 50 5865 4737 5467 4418 4923 4025 4373 3643 5524 4501 

AT 224-920 (2) 60 6083 4914 5671 4585 5107 4179 4539 3782 5730 4670 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 224-018 (2) 25 3675 2865 3152 3900 2477 3052 2526 3323 2010 2620 

AT 224-118 (2) 30 3860 3018 3321 4097 2617 3218 2670 3496 2137 2771 

AT 224-218 (2) 25 3998 3196 3484 4218 2805 3387 2859 3654 2328 2954 

AT 224-318 (2) 40 4232 3335 3658 4479 2909 3546 2963 3845 2395 3069 

AT 224-418 (2) 30 4211 3380 3681 4438 2976 3578 3029 3854 2484 3130 

AT 224-518 (2) 30 4360 3567 3850 4583 3191 3754 3242 4017 2733 3336 

AT 224-618 (2) 40 4613 3731 4051 4855 3303 3941 3359 4235 2778 3465 

AT 224-718 (2) 50 4933 4009 4343 5186 3559 4230 3618 4537 3012 3732 

AT 224-818 (2) 50 5134 4211 4539 5395 3778 4427 3834 4733 3264 3943 

AT 224-918 (2) 60 5327 4370 4710 5597 3922 4594 3981 4911 3391 4093 

AT 224-720 (2) 40 4851 3969 4284 5099 3551 4177 3607 4469 3041 3712 

AT 224-820 (2) 50 5244 4297 4635 5511 3851 4520 3909 4833 3311 4020 

AT 224-920 (2) 60 5439 4460 4809 5717 3998 4690 4058 5014 3445 4173 





78 





ACCESS 

DOOR 

Access Doors 


ACCESS 

DOOR 

7 

F 

T 

(2) 10 BFW/GVD 

INLET 

71 

2 

ACCESS 

DOOR 

ACCESS 

DOOR 

H 

P 

98 1/4 

(2) 3 FPT 

OVERFLOW 

(2) 2 MPT 

MAKE-UP 

(2) 3 FPT 

DRAIN 


OUTLET 

25 1/4 

117 7/8 

16 7/8 

133 

8 1/2 

136 3/4 

3 3/4 

137 3/4 

5 1/8 

142 

24' 1-1/8" 3/8 

L 



Weights (LBS) 

Dimensions 

Fan Air 



AT 224-018 21060 39600 U 6810 (2) 25 258,200 15' 3" 7' 3/4" 11' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 

AT 224-118 21280 39820 U 6920 (2) 30 274,000 15' 3" 7' 3/4" 11' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 

AT 224-218 22620 41160 U 7590 (2) 25 254,100 16' 3" 8' 3/4" 12' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 

AT 224-318 21800 40340 U 7180 (2) 40 300,100 15' 3" 7' 3/4" 11' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 

AT 224-418 22840 41380 U 7700 (2) 30 268,800 16' 3" 8' 3/4" 12' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 

AT 224-518 24320 42860 U 8440 (2) 30 264,800 17' 3" 9' 3/4" 13' 1" 18' 0" 1' 3-1/4"† 2' 6-3/4" 

AT 224-618 23360 41900 U 7960 (2) 40 294,400 16' 3" 8' 3/4" 12' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 

AT 224-718 23480 42020 U 8020 (2) 50 315,900 16' 3" 8' 3/4" 12' 1" 18' 0" 1' 3-1/4" 2' 6-3/4" 

AT 224-818 24960 43500 U 8760 (2) 50 310,300 17' 3" 9' 3/4" 13' 1" 18' 0" 1' 3-1/4"† 2' 6-3/4" 

AT 224-918 25180 43720 U 8870 (2) 60 328,700 17' 3" 9' 3/4" 13' 1" 18' 0" 1' 3-1/4"† 2' 6-3/4" 

AT 224-720 26400 47200 U 9260 (2) 40 293,700 17' 3" 9' 3/4" 13' 1" 20' 0" 1' 3-1/4"† 2' 6-3/4" 

AT 224-820 26520 47320 U 9320 (2) 50 314,700 17' 3" 9' 3/4" 13' 1" 20' 0" 1' 3-1/4"† 2' 6-3/4" 

AT 224-920 26740 47540 U 9430 (2) 60 333,500 17' 3" 9' 3/4" 13' 1" 20' 0" 1' 3-1/4"† 2' 6-3/4" 








✦ 

AT/USS 

F 

UT† 

79



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 424-024 (4) 15 5323 4091 4894 3743 4300 3307 3692 2872 4955 3835 

AT 424-124 (4) 20 5761 4463 5311 4089 4680 3628 4036 3175 5378 4186 

AT 424-224 (4) 15 5725 4524 5310 4173 4727 3735 4122 3295 5371 4266 

AT 424-324 (4) 25 6143 4790 5676 4399 5019 3915 4345 3436 5744 4499 

AT 424-424 (4) 20 6200 4934 5761 4562 5147 4098 4510 3635 5825 4658 

AT 424-524 (4) 30 6465 5069 5987 4660 5308 4157 4602 3662 6055 4767 

AT 424-624 (4) 20 6378 5145 5944 4796 5351 4367 4746 3933 6007 4886 

AT 424-724 (4) 25 6634 5307 6173 4919 5532 4434 4864 3948 6240 5018 

AT 424-824 (4) 30 7014 5633 6536 5229 5867 4724 5171 4222 6605 5335 

AT 424-924 (4) 40 7775 6284 7249 5864 6530 5349 5805 4845 7325 5972 

AT 424-028 (4) 20 6275 4825 5768 4417 5071 3901 4356 3391 5840 4522 

AT 424-128 (4) 15 6316 5078 5880 4713 5283 4267 4662 3832 5943 4807 

AT 424-228 (4) 25 6718 5203 6192 4766 5456 4228 4705 3698 6270 4879 

AT 424-328 (4) 20 6781 5364 6294 4952 5605 4438 4892 3913 6365 5063 

AT 424-428 (4) 20 6976 5621 6501 5237 5846 4753 5182 4275 6569 5335 

AT 424-528 (4) 25 7237 5758 6724 5324 6007 4782 5263 4241 6799 5435 

AT 424-628 (4) 25 7468 6025 6960 5615 6265 5113 5557 4605 7033 5721 

AT 424-728 (4) 30 7665 6125 7131 5676 6388 5115 5610 4551 7207 5791 

AT 424-828 (4) 30 7927 6401 7389 5968 6653 5436 5907 4912 7466 6080 

AT 424-928 (4) 40 8664 7000 8077 6531 7275 5954 6465 5391 8161 6652 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 424-024 (4) 15 4648 3605 3980 4941 3107 3856 3175 4199 2504 3301 

AT 424-124 (4) 20 5053 3948 4346 5363 3421 4209 3489 4574 2791 3622 

AT 424-224 (4) 15 5072 4037 4414 5358 3531 4288 3598 4628 2926 3729 

AT 424-324 (4) 25 5412 4250 4664 5728 3699 4522 3774 4910 3032 3909 

AT 424-424 (4) 20 5513 4422 4815 5811 3891 4680 3960 5044 3244 4092 

AT 424-524 (4) 30 5709 4506 4940 6040 3933 4792 4007 5192 3249 4150 

AT 424-624 (4) 20 5701 4663 5033 5993 4169 4907 4235 5251 3569 4361 

AT 424-724 (4) 25 5913 4769 5182 6225 4214 5042 4289 5426 3532 4427 

AT 424-824 (4) 30 6263 5074 5506 6590 4497 5361 4572 5754 3797 4717 

AT 424-924 (4) 40 6954 5705 6149 7308 5119 5997 5196 6411 4425 5343 

AT 424-028 (4) 20 5480 4254 4693 5824 3669 4547 3749 4952 2960 3895 

AT 424-128 (4) 15 5635 4576 4961 5929 4068 4829 4134 5184 3464 4261 

AT 424-228 (4) 25 5891 4602 5067 6253 3987 4906 4067 5333 3253 4221 

AT 424-328 (4) 20 6011 4791 5234 6350 4195 5088 4275 5488 3478 4430 

AT 424-428 (4) 20 6233 5092 5498 6554 4536 5359 4608 5738 3877 4746 

AT 424-528 (4) 25 6435 5161 5620 6782 4540 5462 4621 5887 3785 4775 

AT 424-628 (4) 25 6675 5460 5894 7016 4882 5746 4959 6149 4180 5106 

AT 424-728 (4) 30 6827 5501 5980 7190 4857 5819 4943 6262 4067 5107 

AT 424-828 (4) 30 7087 5804 6263 7449 5200 6106 5279 6531 4465 5429 

AT 424-928 (4) 40 7748 6354 6850 8142 5698 6680 5783 7142 4915 5947 





80 




Four-Cell 

Cooling 

Towers 

ACCESS 

DOOR 

Access Doors 


ACCESS 

DOOR 

*424-024 thru 924 



ACCESS 

DOOR 

*424-028 thru 928 



ACCESS 

DOOR 

7 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

T 

(2) * BFW/GVD 

OUTLET 

71 

2 

H 

P 

98 1/4 


(2) 2 MPT MAKE-UP 

(2) 3 FPT DRAIN 

5 1/8 

24'-1 1/8" 

(2) * BFW/GVD OUTLET 

117 7/8 

133 

136 3/4 

137 3/4 

142 

8 1/2 

3 3/4 

25 1/4 

16 7/8 

✦ 3/8 L 



Weights (LBS) 

Dimensions 

Fan Air 


AT/USS UT† 


F 

AT 424-024 30040 54900 L 5020 (4) 15 322,300 15' 3" 7' 3/4" 11' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-124 30240 55100 U 5050 (4) 20 353,400 15' 3" 7' 3/4" 13' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-224 32200 57060 U 5540 (4) 15 317,000 16' 3" 8' 3/4" 11' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-324 30440 55300 U 5100 (4) 25 379,400 15' 3" 7' 3/4" 12' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-424 32400 57260 U 5590 (4) 20 347,400 16' 3" 8' 3/4" 13' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-524 30840 55700 U 5200 (4) 30 401,900 15' 3" 7' 3/4" 12' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-624 34360 59220 U 6080 (4) 20 341,900 17' 3" 9' 3/4" 13' 1" 24' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 424-724 32600 57460 U 5640 (4) 25 372,500 16' 3" 8' 3/4" 12' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-824 33000 57860 U 5740 (4) 30 394,400 16' 3" 8' 3/4" 13' 1" 24' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-924 35960 60820 U 6480 (4) 40 424,600 17' 3" 9' 3/4" 13' 1" 24' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 424-028 33480 62940 L 5760 (4) 20 372,900 15' 3" 7' 3/4" 11' 1" 28' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-128 37960 67420 U 6610 (4) 15 329,600 17' 3" 9' 3/4" 13' 1" 28' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 424-228 33720 63180 L 5760 (4) 25 400,300 15' 3" 7' 3/4" 11' 1" 28' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-328 36120 65580 U 6150 (4) 20 366,600 16' 3" 8' 3/4" 12' 1" 28' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-428 38200 67660 U 6670 (4) 20 360,700 17' 3" 9' 3/4" 13' 1" 28' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 424-528 36360 65820 U 6210 (4) 25 393,600 16' 3" 8' 3/4" 12' 1" 28' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-628 38440 67900 U 6730 (4) 25 387,300 17' 3" 9' 3/4" 13' 1" 28' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 424-728 36640 66100 U 6280 (4) 30 416,200 16' 3" 8' 3/4" 12' 1" 28' 1-3/4" 1' 3-1/4" 3' 3/4" 

AT 424-828 38720 68180 U 6800 (4) 30 409,900 17' 3" 9' 3/4" 13' 1" 28' 1-3/4" 1' 3-1/4"† 3' 3/4" 

AT 424-928 39760 69220 U 7060 (4) 40 448,300 17' 3" 9' 3/4" 13' 1" 28' 1-3/4" 1' 3-1/4"† 3' 3/4" 





(5) These models are available as (4) independent operating cells with the addition of water tight basin partitions and flume plate. Consult the factory for details. 



81



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 424-036 (4) 20 7701 5902 7070 5382 6200 4744 5308 4121 7161 5517 

AT 424-136 (4) 25 8112 6239 7457 5712 6556 5045 5633 4385 7550 5847 

AT 424-236 (4) 25 8732 6905 8103 6374 7215 5710 6296 5036 8196 6516 

AT 424-336 (4) 40 9286 7243 8581 6652 7588 5920 6570 5196 8683 6802 

AT 424-436 (4) 30 9183 7296 8529 6744 7614 6051 6666 5357 8624 6885 

AT 424-536 (4) 30 9471 7638 8826 7118 7943 6478 7045 5832 8919 7253 

AT 424-636 (4) 40 10037 8031 9341 7443 8371 6710 7361 5976 9441 7594 

AT 424-736 (4) 50 10716 8612 9987 7999 8970 7229 7910 6466 10092 8162 

AT 424-836 (4) 50 11148 9006 10392 8404 9360 7661 8319 6935 10501 8559 

AT 424-936 (4) 60 11565 9346 10782 8721 9713 7954 8633 7203 10895 8882 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 424-036 (4) 20 6716 5186 5742 7141 4453 5550 4549 6055 3568 4735 

AT 424-136 (4) 25 7085 5501 6068 7529 4745 5878 4849 6402 3828 5036 

AT 424-236 (4) 25 7739 6167 6738 8176 5398 6550 5501 7065 4475 5701 

AT 424-336 (4) 40 8183 6426 7051 8660 5593 6838 5707 7423 4586 5910 

AT 424-436 (4) 30 8161 6537 7118 8603 5746 6918 5847 7461 4775 6042 

AT 424-536 (4) 30 8465 6921 7472 8898 6182 7284 6280 7796 5291 6469 

AT 424-636 (4) 40 8947 7217 7842 9419 6378 7629 6492 8210 5347 6700 

AT 424-736 (4) 50 9572 7761 8418 10068 6881 8199 6997 8797 5814 7219 

AT 424-836 (4) 50 9969 8176 8813 10477 7331 8596 7441 9189 6322 7651 

AT 424-936 (4) 60 10343 8485 9146 10870 7612 8920 7726 9535 6578 7944 





82 





Access Doors 


ACCESS 

DOOR 

ACCESS 

DOOR 

7 

ACCESS 

DOOR 

ACCESS 

DOOR 

H 


OUTLET 

T 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 

71 

2 

H 

P 

98 1/4 


(2) 2 MPT MAKE-UP 

(2) 3 FPT DRAIN 

5 1/8 

24' 1-1/8" 

(4) 10 BFW/GVD OUTLET 

117 7/8 

133 

136 3/4 

137 3/4 

142 

25 1/4 

16 7/8 

8 1/2 

3 3/4 

✦ 

3/8 

L 



Weights (LBS) 

Dimensions 

Fan Air 



AT 424-036 42000 79280 L 7480 (4) 20 463,300 15' 3" 7' 3/4" 11' 1" 1' 3-1/4" 2' 6-3/4" 

AT 424-136 42200 79480 L 7480 (4) 25 498,000 15' 3" 7' 3/4" 11' 1" 1' 3-1/4" 2' 6-3/4" 

AT 424-236 45320 82600 U 7590 (4) 25 489,600 16' 3" 8' 3/4" 12' 1" 1' 3-1/4" 2' 6-3/4" 

AT 424-336 43680 80960 L 7480 (4) 40 578,400 15' 3" 7' 3/4" 11' 1" 1' 3-1/4" 2' 6-3/4" 

AT 424-436 45760 83040 U 7700 (4) 30 519,200 16' 3" 8' 3/4" 12' 1" 1' 3-1/4" 2' 6-3/4" 

AT 424-536 48720 86000 U 8440 (4) 30 510,800 17' 3" 9' 3/4" 13' 1" 1' 3-1/4"† 2' 6-3/4" 

AT 424-636 46800 84080 U 7960 (4) 40 567,900 16' 3" 8' 3/4" 12' 1" 1' 3-1/4" 2' 6-3/4" 

AT 424-736 47040 84320 U 8020 (4) 50 609,200 16' 3" 8' 3/4" 12' 1" 1' 3-1/4" 2' 6-3/4" 

AT 424-836 50000 87280 U 8760 (4) 50 598,800 17' 3" 9' 3/4" 13' 1" 1' 3-1/4"† 2' 6-3/4" 

AT 424-936 50440 87720 U 8870 (4) 60 634,500 17' 3" 9' 3/4" 13' 1" 1' 3-1/4"† 2' 6-3/4" 





(5) These models are available as (4) independent operating cells with the addition of a water tight basin partitions and flume plate. Consult the factory for details. 



AT/USS 

F 

UT† 

83



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 114-0124 30 2919 2232 2677 2031 2345 1785 2004 1545 2711 2082 

AT 114-0224 40 3135 2409 2882 2204 2532 1947 2173 1691 2918 2258 

AT 114-0324 25 3187 2562 2967 2378 2665 2153 2352 1933 2998 2425 

AT 114-0424 50 3345 2588 3081 2369 2713 2099 2339 1834 3120 2425 

AT 114-0524 30 3325 2675 3097 2489 2783 2255 2462 2025 3130 2538 

AT 114-0624 40 3463 2741 3215 2533 2865 2269 2502 2003 3250 2588 

AT 114-0724 40 3603 2905 3358 2706 3021 2459 2678 2214 3393 2757 

AT 114-0824 50 3670 2921 3411 2701 3048 2427 2671 2153 3449 2758 

AT 114-0924 50 3793 3060 3535 2852 3182 2597 2823 2340 3572 2906 

AT 114-1024 60 3876 3098 3606 2871 3231 2587 2838 2302 3645 2929 

AT 114-1124 60 4011 3239 3739 3020 3367 2751 2989 2486 3778 3077 

AT 114-1224 75 4221 3409 3935 3181 3544 2899 3148 2624 3976 3240 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 114-0124 30 2542 1958 2167 2704 1677 2094 1713 2290 1339 1782 

AT 114-0224 40 2737 2123 2343 2910 1829 2270 1869 2472 1473 1944 

AT 114-0324 25 2843 2309 2503 2991 2052 2436 2086 2615 1747 2150 

AT 114-0424 50 2931 2288 2518 3111 1980 2438 2020 2652 1614 2096 

AT 114-0524 30 2968 2416 2617 3122 2150 2550 2185 2731 1834 2252 

AT 114-0624 40 3071 2450 2675 3242 2148 2600 2189 2805 1781 2266 

AT 114-0724 40 3220 2631 2841 3385 2347 2769 2384 2965 2007 2456 

AT 114-0824 50 3264 2619 2852 3440 2305 2772 2345 2987 1922 2424 

AT 114-0924 50 3390 2773 2993 3563 2480 2918 2520 3123 2124 2594 

AT 114-1024 60 3453 2782 3025 3636 2457 2943 2501 3167 2057 2583 

AT 114-1124 60 3586 2937 3169 3769 2632 3090 2671 3305 2260 2747 

AT 114-1224 75 3774 3094 3336 3967 2773 3254 2815 3479 2388 2895 





84 





ACCESS 

DOOR 

ACCESS DOOR 

SWINGS MOUNT 

INSIDE 

7 

F 

ACCESS 

DOOR 

2 

T 

142 1/2 

14 BFW/GOOVED 

INLET 

H 

P 

99 3/8 

4 FPT 

OVERFLOW 

26 

13' 11-1/4" 

3/8 

✦ 

17 3/8 

9 

3 5/8 

9 

4 FPT 

DRAIN 

72 1/4 

142 1/2 

3 MPT 

MAKE-UP 

284 7/8 


OUTLET 



Weights (LBS) 

Dimensions 

Fan Air 



AT 114-0124 16510 32360 U 10670 30 180,300 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 114-0224 16660 32510 U 10820 40 197,600 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 114-0324 18570 34420 U 12730 25 163,200 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 114-0424 17010 32860 U 11170 50 212,300 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 114-0524 18590 34440 U 12750 30 173,400 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 114-0624 17700 33550 U 11860 40 194,100 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 114-0724 18740 34590 U 12900 40 190,900 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 114-0824 18050 33900 U 12210 50 208,500 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 114-0924 19090 34940 U 13250 50 205,000 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 114-1024 18220 34070 U 12380 60 220,600 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 114-1124 19260 35110 U 13420 60 217,100 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 114-1224 19500 35350 U 13660 75 233,100 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT/USS 

F 

UT 







85



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 214-0148 (2) 30 5715 4357 5239 3968 4585 3480 3914 3000 5306 4066 

AT 214-0248 (2) 40 6136 4709 5637 4300 4947 3797 4241 3295 5711 4409 

AT 214-0348 (2) 50 6556 5062 6033 4633 5310 4100 4573 3574 6109 4742 

AT 214-0448 (2) 25 6260 5027 5828 4666 5235 4222 4616 3790 5890 4759 

AT 214-0548 (2) 30 6533 5255 6083 4884 5466 4424 4831 3973 6148 4981 

AT 214-0648 (2) 40 6798 5374 6307 4959 5615 4441 4898 3917 6380 5069 

AT 214-0748 (2) 40 7081 5706 6598 5316 5934 4826 5261 4341 6667 5416 

AT 214-0848 (2) 50 7453 6011 6945 5602 6251 5100 5544 4591 7018 5708 

AT 214-0948 (2) 60 7614 6076 7082 5627 6339 5068 5562 4508 7158 5745 

AT 214-1048 (2) 60 7883 6364 7347 5933 6615 5403 5872 4878 7424 6044 

AT 214-1148 (2) 75 8295 6699 7732 6249 6963 5694 6185 5153 7813 6366 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 214-0148 (2) 30 4970 3823 4230 5291 3270 4089 3339 4479 2604 3474 

AT 214-0248 (2) 40 5354 4143 4581 5694 3563 4435 3640 4831 2862 3790 

AT 214-0348 (2) 50 5740 4474 4923 6092 3868 4767 3945 5191 3139 4093 

AT 214-0448 (2) 25 5584 4531 4911 5876 4025 4781 4091 5137 3425 4216 

AT 214-0548 (2) 30 5831 4741 5139 6133 4217 5004 4286 5364 3594 4418 

AT 214-0648 (2) 40 6023 4798 5243 6363 4198 5096 4278 5498 3479 4433 

AT 214-0748 (2) 40 6327 5168 5580 6652 4606 5439 4679 5824 3937 4819 

AT 214-0848 (2) 50 6661 5447 5880 7002 4867 5733 4944 6135 4166 5093 

AT 214-0948 (2) 60 6778 5454 5933 7141 4810 5773 4896 6212 4023 5060 

AT 214-1048 (2) 60 7047 5770 6226 7407 5169 6070 5247 6494 4433 5396 

AT 214-1148 (2) 75 7416 6077 6556 7795 5447 6393 5529 6836 4685 5687 





86 





ACCESS 

DOOR 

ACCESS DOOR 

SWINGS MOUNT 

INSIDE 

ACCESS 

DOOR 

7 

F 

ACCESS 

DOOR 

ACCESS 

DOOR 

2 

T 

142 1/2 


OUTLET 

142 1/2 

H 

P 

99 3/8 

26 

3/8 

✦ 

9 

3 5/8 

17 3/8 

142 1/2 

212 5/8 

275 7/8 

(2) 4 FPT 

OVERFLOW 

(2) 4 FPT 

DRAIN 

(2) 3 MPT 

MAKE-UP 


OUTLET 

284 7/8 2 1/2 

13' 11-3/8" 

47' 8-1/4" 



Weights (LBS) 

Dimensions 

Fan Air 



AT 214-0148 32780 64480 U 10670 (2) 30 357,000 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 214-0248 33080 64780 U 10820 (2) 40 391,200 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 214-0348 33780 65480 U 11170 (2) 50 420,400 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 214-0448 36900 68600 U 12730 (2) 25 323,100 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 214-0548 36940 68640 U 12750 (2) 30 343,300 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 214-0648 35160 66860 U 11860 (2) 40 384,300 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 214-0748 37240 68940 U 12900 (2) 40 378,000 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 214-0848 37940 69640 U 13250 (2) 50 405,900 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 214-0948 36200 67900 U 12380 (2) 60 436,800 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 214-1048 38280 69980 U 13420 (2) 60 429,900 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 214-1148 38760 70460 U 13660 (2) 75 461,500 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT/USS 

F 

UT 








87



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 314-0172 (3) 30 8499 6474 7792 5896 6817 5168 5817 4449 7892 6042 

AT 314-0272 (3) 40 9132 7004 8387 6392 7358 5640 6304 4897 8496 6553 

AT 314-0372 (3) 50 9757 7525 8975 6888 7897 6092 6800 5307 9088 7050 

AT 314-0472 (3) 25 9324 7484 8680 6947 7796 6285 6872 5640 8772 7085 

AT 314-0572 (3) 30 9731 7826 9061 7271 8141 6585 7192 5914 9157 7415 

AT 314-0672 (3) 40 10122 7997 9388 7376 8356 6601 7286 5823 9496 7540 

AT 314-0772 (3) 50 10736 8526 9970 7881 8899 7070 7791 6257 10081 8046 

AT 314-0872 (3) 40 10547 8498 9828 7917 8838 7184 7835 6462 9931 8066 

AT 314-0972 (3) 50 11101 8953 10345 8343 9310 7592 8257 6836 10454 8501 

AT 314-1072 (3) 60 11340 9044 10547 8373 9436 7538 8277 6706 10661 8549 

AT 314-1172 (3) 60 11742 9479 10944 8836 9854 8047 8746 7262 11059 9001 

AT 314-1272 (3) 75 12357 9979 11518 9308 10372 8480 9212 7674 11638 9481 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 314-0172 (3) 30 7389 5676 6286 7869 4857 6077 4959 6655 3864 5158 

AT 314-0272 (3) 40 7966 6159 6814 8471 5293 6592 5407 7186 4247 5630 

AT 314-0372 (3) 50 8536 6647 7318 9062 5748 7088 5862 7721 4654 6081 

AT 314-0472 (3) 25 8317 6746 7312 8752 5992 7118 6089 7649 5097 6276 

AT 314-0572 (3) 30 8684 7059 7653 9135 6277 7449 6380 7989 5349 6576 

AT 314-0672 (3) 40 8966 7137 7803 9472 6241 7579 6360 8182 5171 6590 

AT 314-0772 (3) 50 9539 7637 8318 10056 6713 8085 6832 8721 5577 7059 

AT 314-0872 (3) 40 9423 7697 8311 9908 6857 8101 6966 8674 5861 7174 

AT 314-0972 (3) 50 9922 8112 8758 10430 7246 8538 7361 9137 6201 7582 

AT 314-1072 (3) 60 10093 8116 8832 10636 7155 8591 7282 9246 5981 7527 

AT 314-1172 (3) 60 10496 8593 9273 11033 7698 9040 7814 9673 6599 8037 

AT 314-1272 (3) 75 11047 9052 9765 11611 8112 9523 8235 10182 6975 8469 





88 





ACCESS 

DOOR 

ACCESS DOOR 

SWINGS MOUNT 

INSIDE 

ACCESS 

DOOR 

ACCESS 

DOOR 

7 

F 

2 

T 

142 1/2 

ACCESS 

DOOR 

ACCESS 

DOOR 

ACCESS 

DOOR 


INLET 

H 

99 3/8 

P 

26 

13' 11-3/8" 

142 1/2 

9 

3/8" ✦ 

17 3/8 

212 5/8 

72 1/4 

9 

3 5/8 

275 7/8 

284 7/8 2 1/2 

71' 7-5/8" 

(3) 3 MPT 

MAKE-UP 

(3) 4 FPT 

OVERFLOW 

(3) 4 FPT 

DRAIN 


OUTLET 



Weights (LBS) 

Dimensions 

Fan Air 



AT 314-0172 53550 101100 U 10670 (3) 30 530,100 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 314-0272 54000 101550 U 10820 (3) 40 580,900 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 314-0372 55050 102600 U 11170 (3) 50 624,200 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 314-0472 59730 107280 U 12730 (3) 25 479,800 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 314-0572 59790 107340 U 12750 (3) 30 509,800 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 314-0672 57120 104670 U 11860 (3) 40 570,700 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 314-0772 58170 105720 U 12210 (3) 50 613,000 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 314-0872 60240 107790 U 12900 (3) 40 561,200 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 314-0972 61290 108840 U 13250 (3) 50 602,700 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 314-1072 58680 106230 U 12380 (3) 60 648,600 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 314-1172 61800 109350 U 13420 (3) 60 638,300 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 314-1272 62520 110070 U 13660 (3) 75 685,300 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 





(5) These models are available as (3) independent operating cells with the addition of flume plates. Consult the factory for details. 



AT/USS 

F 

UT 

89



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 228-0124 (2) 40 6110 4687 5612 4279 4924 3777 4220 3278 5685 4387 

AT 228-0224 (2) 50 6527 5036 6005 4609 5284 4078 4551 3554 6080 4718 

AT 228-0324 (2) 25 6235 5006 5804 4647 5213 4204 4596 3773 5866 4739 

AT 228-0424 (2) 30 6507 5233 6059 4863 5444 4405 4810 3956 6123 4959 

AT 228-0524 (2) 40 6769 5350 6279 4935 5590 4418 4875 3897 6352 5045 

AT 228-0624 (2) 50 7179 5703 6668 5272 5952 4730 5211 4188 6742 5382 

AT 228-0724 (2) 60 7583 6049 7053 5601 6312 5044 5537 4487 7129 5719 

AT 228-0824 (2) 60 7852 6338 7318 5909 6589 5381 5848 4857 7395 6019 

AT 228-0924 (2) 75 8262 6673 7701 6224 6935 5671 6160 5132 7782 6340 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 228-0124 (2) 40 5330 4122 4560 5669 3544 4413 3620 4809 2845 3770 

AT 228-0224 (2) 50 5712 4450 4898 6063 3848 4743 3924 5166 3118 4071 

AT 228-0324 (2) 25 5562 4512 4890 5852 4008 4760 4073 5116 3410 4198 

AT 228-0424 (2) 30 5807 4721 5118 6109 4199 4982 4267 5342 3578 4399 

AT 228-0524 (2) 40 5997 4775 5220 6335 4177 5071 4256 5473 3461 4410 

AT 228-0624 (2) 50 6380 5110 5564 6725 4492 5408 4571 5833 3733 4723 

AT 228-0724 (2) 60 6750 5429 5907 7112 4787 5747 4872 6185 4002 5036 

AT 228-0824 (2) 60 7019 5746 6201 7377 5148 6045 5225 6468 4414 5374 

AT 228-0924 (2) 75 7387 6053 6530 7764 5425 6368 5507 6808 4665 5664 





90 





ACCESS DOOR 

SWINGS MOUNT 

INSIDE 

ACCESS 

DOOR 

7 

ACCESS 

DOOR 

F 

2 

T 

ACCESS 

DOOR 

142 3/8 

ACCESS 

DOOR 


INLET 

H 

99 3/8 

P 

(2) 4 FPT 

(2) 14 

OVERFLOW 

BFW/GROOVED 

OUTLET 

(2) 3 

138 

MPT MAKE-UP 

(2) 4 

157 1/4 

17 3/8 

FPT DRAIN 

161 1/2 

9 

162 1/2 

5 1/8 

167 1/4 

4 1/4 

28' 3-5/8" 3/8 

23' 8-3/4" 

✦ 

26 



Weights (LBS) 

Dimensions 

Fan Air 



AT 228-0124 32760 64460 U 10820 (2) 40 389,400 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 228-0224 33460 65160 U 11170 (2) 50 418,200 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 228-0324 36580 68280 U 12730 (2) 25 322,200 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 228-0424 36620 68320 U 12750 (2) 30 342,300 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 228-0524 34840 66540 U 11860 (2) 40 382,400 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 228-0624 35540 67240 U 12210 (2) 50 410,500 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 228-0724 35880 67580 U 12380 (2) 60 434,800 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 228-0824 37960 69660 U 13420 (2) 60 427,800 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 228-0924 38440 70140 U 13660 (2) 75 459,200 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 








AT/USS 

F 

UT 

91



† 




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

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

Model No. Hp WB 66° 66° 68° 68° 70° 70° 72° 72° 75° 75° 

AT 428-0148 (4) 30 10706 8109 9798 7363 8545 6452 7254 5509 9931 7564 

AT 428-0248 (4) 40 11526 8796 10565 8007 9249 7029 7899 6068 10701 8207 

AT 428-0348 (4) 50 12323 9458 11322 8640 9938 7633 8521 6623 11470 8859 

AT 428-0448 (4) 25 11865 9497 11041 8812 9900 7965 8714 7134 11160 8991 

AT 428-0548 (4) 30 12386 9939 11529 9226 10355 8345 9126 7488 11652 9409 

AT 428-0648 (4) 40 12853 10110 11896 9303 10570 8289 9191 7297 12033 9508 

AT 428-0748 (4) 50 13642 10787 12659 9957 11272 8919 9836 7866 12805 10179 

AT 428-0848 (4) 40 13430 10809 12510 10061 11244 9117 9951 8189 12643 10260 

AT 428-0948 (4) 50 14137 11391 13173 10612 11847 9633 10503 8666 13311 10812 

AT 428-1048 (4) 60 14422 11463 13397 10595 11961 9509 10474 8423 13545 10817 

AT 428-1148 (4) 60 14954 12062 13936 11242 12544 10236 11125 9215 14082 11454 

AT 428-1248 (4) 75 15738 12705 14668 11844 13207 10787 11722 9737 14822 12065 


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

Motor LWT 85° 85° 85° 87° 85° 85° 85° 86° 85° 85° 

Model No. Hp WB 76° 76° 78° 78° 78° 78° 80° 80° 80° 80° 

AT 428-0148 (4) 30 9289 7073 7877 9901 6012 7612 6159 8333 4702 6440 

AT 428-0248 (4) 40 10027 7719 8539 10671 6604 8254 6744 9036 5263 7016 

AT 428-0348 (4) 50 10753 8323 9201 11437 7161 8911 7316 9705 5755 7619 

AT 428-0448 (4) 25 10579 8549 9278 11133 7591 9032 7718 9705 6451 7954 

AT 428-0548 (4) 30 11047 8958 9710 11625 7956 9452 8085 10157 6768 8333 

AT 428-0648 (4) 40 11357 9003 9849 12002 7842 9557 7990 10351 6484 8276 

AT 428-0748 (4) 50 12090 9633 10526 12772 8432 10232 8593 11037 6989 8905 

AT 428-0848 (4) 40 11991 9767 10572 12614 8694 10305 8836 11034 7418 9104 

AT 428-0948 (4) 50 12631 10318 11141 13280 9194 10860 9340 11627 7859 9620 

AT 428-1048 (4) 60 12820 10271 11183 13512 9030 10870 9189 11721 7510 9495 

AT 428-1148 (4) 60 13366 10930 11800 14050 9768 11504 9924 12311 8362 10222 

AT 428-1248 (4) 75 14068 11519 12429 14787 10318 12118 10474 12965 8849 10773 





92 





ACCESS 

DOOR 

ACCESS DOOR 

SWINGS MOUNT 

INSIDE 

ACCESS 

DOOR 

7 

ACCESS 

DOOR 

ACCESS 

DOOR 

F 

2 

T 

ACCESS 

DOOR 

142 3/8 


INLET 

ACCESS 

DOOR 

H 

99 3/8 

P 

26 

(4) 4 FPT 

OVERFLOW 

(4) 3 MPT 

MAKE-UP 

(4) 4 FPT 

DRAIN 

5 1/8 

28' 3-5/8" 

(4) 14 

BFW/GOOVED 

OUTLET 

138 

157 1/4 

161 1/2 

162 1/2 

167 1/4 

17 3/8 

9 

4 1/4 

✦ 

3/8 

284 3/4 43 

51' 1/2" 

(4) 12 BFW/GOOVED EQUALIZER 

IN-LINE WITH OUTLETS 



Weights (LBS) 

Dimensions 

Fan Air 



AT 428-0148 65560 128960 U 10670 (4) 30 685,500 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 428-0248 66160 129560 U 10820 (4) 40 752,000 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 428-0348 67560 130960 U 11170 (4) 50 807,000 16' 3/8" 7' 9" 11' 3-7/8" 1' 3-1/4"† 2' 6-3/4" 

AT 428-0448 73800 137200 U 12730 (4) 25 621,100 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 428-0548 73880 137280 U 12750 (4) 30 660,100 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 428-0648 70320 133720 U 11860 (4) 40 739,200 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 428-0748 71720 135120 U 12210 (4) 50 793,000 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 428-0848 74480 137880 U 12900 (4) 40 726,500 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 428-0948 75880 139280 U 13250 (4) 50 780,200 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 428-1048 72400 135800 U 12380 (4) 60 840,300 17' 3/8" 8' 9" 12' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 428-1148 76560 139960 U 13420 (4) 60 826,200 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 

AT 428-1248 77520 140920 U 13660 (4) 75 886,300 18' 3/8" 9' 9" 13' 3-7/8" 1' 3-1/4" 2' 6-3/4" 





(5) These models are available as (4) independent operating cells with the addition of flume plates. Consult the factory for details. 



AT/USS 

F 

UT 

93

STRUCTURAL STEEL SUPPORT 

Models AT/UT/USS 14-64 to 314-1272 

Suggested Two I-Beam Arrangement 

End Elevation 

Plan View 

Models AT & USS 14-64 through 110-912 

Two I-Beams Required (By Others) 

Dimensions 

Model No. W L 

14-64 to 94 4' 4" 3' 11-3/4" 

14-66 to 96 4' 4" 5' 11-3/4" 

14-69 to 99 4' 4" 8' 11-3/4" 

14-612 to 912 4' 4" 11' 11-3/4" 

26-517 to 917 5' 11-7/8" 17' 1-1/2" 

28-217 to 917 7' 5-7/8" 17' 1-1/2" 

19-56 to 96 5' 11-7/8" 8' 5-1/2" 

19-28 to 98 7' 5-7/8" 8' 5-1/2" 

19-59 to 99 8' 5-1/2" 8' 11-1/2" 

19-111 to 911 8' 5-1/2" 10' 5-1/2" 

19-412 to 912 8' 5-1/2" 11' 11-3/4" 

19-114 to 914 8' 5-1/2" 13' 11-3/4" 

29-318 to 918 8' 5-1/2" 18' 0" 

29-121 to 921 8' 5-1/2" 21' 0" 

29-024 to 924 8' 5-1/2" 24' 2" 

29-228 to 928 8' 5-1/2" 28' 2" 

39-336 to 936 8' 5-1/2" 36' 4-1/4" 

39-242 to 942 8' 5-1/2" 42' 4-1/4" 

110-112 to 912 9' 9-3/4" 11' 11-3/4" 

Models AT & USS 110-918 through 314-1272 

Two I-Beams Required (By Others) 

Dimensions 

Model No. W L 

110-118 to 918 9' 9-3/4" 18' 0" 

210-124 to 924 9' 9-3/4" 24' 2" 

210-136 to 936 9' 9-3/4" 36' 2-1/2" 

310-136 to 936 9' 9-3/4" 36' 4-1/4" 

310-154 to 954 9' 9-3/4" 54' 5" 

112-012 to 912 11' 10" 11' 11-3/4" 

112-314 to 914 11' 10" 13' 11-3/4" 

112-018 to 918 11' 10" 18' 0" 

112-520 to 920 11' 10" 20' 0" 

212-024 to 924 11' 10" 24' 2" 

212-128 to 928 11' 10" 28' 2" 

212-036 to 936 11' 10" 36' 2-1/2" 

312-036 to 936 11' 10" 36' 4-1/4" 

312-042 to 942 11' 10" 42' 4-1/4" 

312-054 to 954 11' 10" 54' 5" 

312-260 to 960 11' 10" 60' 5" 

114-0124 to 1224 13' 11-1/4" 23' 9" 

214-0148 to 1148 13' 11-1/4" 47' 8-1/4" 

314-0172 to 1272 13' 11-1/4" 71' 7-5/8" 

Notes: 

Models AT/UT/USS 14-64 through 314-1272 

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

drawings. 

2. The recommended support for the AT/UT/USS Cooling Tower 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. For these models where two support beams are required, deflection may be calculated by using 55% of the operating weight as a uniform 

load on each beam. 

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

6. Support beams and Anchor bolts are to be furnished by others. 

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

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

ELEVATED TO ALLOW FOR PIPING. 

94

STRUCTURAL STEEL SUPPORT 

Models AT/UT/USS 212-059 to 428-1248 

Suggested Three I-Beam Arrangement 

End Elevation 


Three I-Beams Required (By Others) 

Plan View 

Dimensions 

Model No. W L 

212-59 to 99 12' 4-7/8" 8' 5-1/2" 

215-29 to 99 15' 4-7/8" 8' 5-1/2" 

217-59 to 99 17' 4-1/8" 8' 11-1/2" 

217-111 to 911 17' 4-1/8" 10' 5-1/2" 

217-412 to 912 17' 4-1/8" 11' 11-3/4" 

217-214 914 17' 4-1/8" 13' 11-3/4" 

220-112 to 912 20' 0-5/8" 11' 11-3/4" 

220-118 to 918 20' 0-5/8" 18' 0" 

420-124 to 924 20' 0-5/8" 24' 1-3/4" 

420-136 to 936 20' 0-5/8" 36' 2-1/2" 

224-018 to 918 24’ 1-1/8” 18’ 0” 

224-720 to 920 24' 1-1/8" 20' 0" 

424-024 to 924 24’ 1-1/8” 24’ 1-3/4” 

424-028 to 928 24’ 1-1/8” 28’ 1-3/4” 

424-036 to 936 24’ 1-1/8” 36’ 2-1/4” 

228-0124 to 0924 28’ 3-5/8” 23’ 9” 

428-0148 to 1248 

Notes: 

28’ 3-5/8” 51’ 1” 


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

drawings. 

2. The recommended support for the AT/UT/USS Cooling Tower 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. For these models only where three support beams are required, deflection may be calculated using 56% of the operating weight on the 

CENTER BEAM and 22% on each OUTBOARD beam. See pages 27, 29, 37 and 39 for operating weights. 

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

6. Support beams and Anchor bolts are to be furnished by others. 

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

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

ELEVATED TO ALLOW FOR PIPING. 

95

DRAIN DOWN VOLUME FOR 

REMOTE SUMP APPLICATIONS 

The following chart provides the maximum drain down volume allowable per AT & USS model number. Use this chart 

when sizing indoor or outdoor remote sumps tanks. Remote sump applications are commonly used whenever a 

cooling tower is idle during sub-freezing weather to protect the water in the basin from freezing or for large multitower 

industrial applications. Either application allows the circulating water to gravity drain into a remote sump tank 

indoors or a large, outdoor concrete basin located underneath the cooling tower. 

The water volume provided is the cooling tower portion of the remote sump tank only. The tank should allow for 

drain down water from external piping and pump suction coverage. 

Model 

Maximum 

Drain Down 

Volume 

14-64 to 14-94 90 

14-66 to 14-96 140 

14-69 to 14-99 220 

14-612 to 14-912 275 

19-56 to 19-96 279 

19-28 to 19-98 329 

26-517 to 26-917 558 

28-217 to 28-917 658 

212-59 to 212-99 558 

215-29 to 215-99 658 

19-59 to 19-99 381 

19-111 to 19-911 447 

19-412 to 19-912 514 

19-114 to 19-914 602 

217-59 to 217-99 762 

217-111 to 217-911 850 

217-412 to 217-912 975 

217-214 to 217-914 1150 

29-318 to 29-918 778 

29-121 to 29-921 910 

29-024 to 29-924 1028 

29-228 to 29-928 1204 

39-336 to 39-936 1542 

39-242 to 39-942 1806 

110-112 to 110-912 832 

110-118 to 110-918 1260 

210-124 to 210-924 1664 

210-136 to 210-936 2520 

Model 

Maximum 

Drain Down 

Volume 

310-136 to 310-936 2496 

310-154 to 310-954 3780 

112-012 to 112-912 832 

112-314 to 112-914 974 

112-018 to 112-918 1260 

112-520 to 112-920 1401 

212-024 to 212-924 1664 

212-128 to 212-928 1948 

212-036 to 212-936 2520 

312-036 to 312-936 2496 

312-042 to 312-942 2922 

312-054 to 312-954 3780 

312-260 to 312-960 4203 

220-112 to 220-912 1664 

220-118 to 220-918 2520 

420-124 to 420-924 3392 

420-136 to 420-936 5040 

224-018 to 224-918 2520 

224-720 to 224-920 2802 

424-024 to 424-924 3392 

424-028 to 424-928 3960 

424-036 to 424-936 5102 

114-0124 to 114-1224 2186 

214-0148 to 214-1148 4372 

314-0172 to 314-1272 6558 

228-0124 to 228-0924 4372 

428-0148 to 428-1248 8744 

96

Notes: 

97

® 

EVAPCO PRODUCTS ARE MANUFACTURED WORLDWIDE. 

World Headquarters/ 

Research and 

Development Center 

EVAPCO Facilities 

EVAPCO, Inc. — 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: marketing@evapco.com 

EVAPCO North America 

EVAPCO Europe 

EVAPCO Asia/Pacific 

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 

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, 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 

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@evapco.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 

EVAPCO China 

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 

Aqua-Cool Towers (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@aquacoolingtowers.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 

EVAPCO...SPECIALISTS IN HEAT TRANSFER PRODUCTS AND SERVICES. 

2M/1008/YGS 

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

Bulletin 331A 

Cert no. BV-COC-080211 

80%

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