EVAPCO ATC-DC Series User manual

Rigging and
Assembly Instructions
ATC-DC Condenser
eco-ATWB-H Closed Circuit Cooler
Bulletin 124H
Visit EVAPCO’s Website at: http://www.evapco.com
EVAPCO...SPECIALISTS IN HEAT TRANSFER PRODUCTS AND SERVICES.
EVAPCO, Inc. — World Headquarters & Research/Development Center
EVAPCO, Inc. • P.O. Box 1300 • Westminster, MD 21158 USA
PHONE: [phone] • FAX: [phone] • E-MAIL: [email protected]
EVAPCO, Inc.
World Headquarters
P.O. Box 1300
Westminster, MD 21158 USA
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO Asia/Pacific
EVAPCO Asia/Pacific Headquarters
1159 Luoning Rd. Baoshan Industrial Zone
Shanghai, P. R. China, Postal Code: 200949
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO Europe
EVAPCO Europe BVBA
European Headquarters
Industrieterrein Oost 4010
3700 Tongeren, Belgium
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO East
5151 Allendale Lane
Taneytown, MD 21787 USA
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO Midwest
1723 York Road
Greenup, IL 62428 USA
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
EVAPCO West
1900 West Almond Avenue
Madera, CA 93637 USA
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO Iowa
925 Quality Drive
Lake View, IA 51450 USA
Phone: [phone]
Fax: [phone]
EVAPCO Iowa
Sales & Engineering
215 1st Street, NE
P.O. Box 88
Medford, MN 55049 USA
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO Northwest
5775 S.W. Jean Road, Suite 104
Lake Oswego, Oregon 97035 USA
Phone: [phone]
Fax: [phone]
EVAPCO Newton
701 East Jourdan Street
Newton, IL 62448 USA
Phone: [phone]
Fax: [phone]
E-mail: [e-mail]
EVAPCO-BLCT Dry Cooling, Inc.
981 US Highway 22 West
Bridgewater, New Jersey 08807 USA
Phone: [phone]
E-mail: [email protected]
Refrigeration Valves &
Systems Corporation
A wholly owned subsidiary of EVAPCO, Inc.
1520 Crosswind Dr.
Bryan, TX 77808 USA
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EvapTech, Inc.
A wholly owned subsidiary of EVAPCO, Inc.
8331 Nieman Road
Lenexa, KS 66214 USA
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Tower Components, Inc.
A wholly owned subsidiary of EVAPCO, Inc.
5960 US HWY 64E
Ramseur, NC 27316
Phone: [phone]
Fax: [phone]
E-mail:
[email protected]
EVAPCO Europe, S.r.l.
Via Ciro Menotti 10
I-20017 Passirana di Rho
Milan, Italy
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO Europe, S.r.l.
Via Dosso 2
23020 Piateda Sondrio, Italy
EVAPCO Europe GmbH
Insterburger Straße 18
40670 Meerbusch, Germany
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Flex coil a/s
A wholly owned subsidiary of EVAPCO , Inc.
Knøsgårdvej 115
DK-9440 Aabybro Denmark
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO S.A. (Pty.) Ltd.
A licensed manufacturer of EVAPCO , Inc.
18 Quality Road
Isando 1600
Republic of South Africa
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
Evap Egypt Engineering Industries Co.
A licensed manufacturer of EVAPCO , Inc.
5 El Nasr Road
Nasr City, Cairo, Egypt
Phone: [phone]
/2 02 24044997
Fax: [phone]
E-mail: [email protected] / [email protected]
EVAPCO (Shanghai) Refrigeration
Equipment Co., Ltd.
1159 Luoning Rd., Baoshan Industrial Zone
Shanghai, P.R. China, Postal Code: 200949
Phone: [phone]
Fax: [phone]
E-mail:
marketing @evapcochina.com
Beijing EVAPCO Refrigeration
Equipment Co., Ltd.
No. 66, District 4,
Yanqi Development Zone, Huairou,
Beijing 101407 P.R. China
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO Australia (Pty.) Ltd.
34-42 Melbourne Road
P.O. Box 436
Riverstone, N.S.W. Australia 2765
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO Composites Sdn. Bhd
No. 70 (Lot 1289) Jalan Industri 2/3
Rawang Integrated Industrial Park
Rawang, Selangor, 48000 Malaysia
Phone: [phone]
Fax: [phone]
EvapTech Asia Pacific Sdn. Bhd
A wholly owned subsidiary of EvapTech, Inc.
B-6-1, IOI Boulevard
Jalan Kenari 5, Bandar Puchong Jaya
47170 Puchong, Selangor Darul Ehsan
Malaysia
Phone: [phone]
Fax: [phone]
E-mail: [email protected]
EVAPCO North America
EVAPCO Products are Manufactured Wordwide

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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Figure 1 - Steel Support (3’, 4’, 8.5’, 10’ and 12’ wide models) Figure 2 - Steel Support (17’, 20’ and 24’ wide models)
Method of Shipment
The ATC-DC and eco-ATWB-H induced draft coil products are shipped in three sections. These sections consist of the fan section, the
coil section and the basin section. These sections have mating flanges and will join together in a waterproof joint when sealed and
bolted together as described in the following instructions. Miscellaneous items, such as sealer, self-tapping screws and any other
required materials, are packaged and placed inside the pan for shipment. For units consisting of multiple cells, drip channels and splash
guards will ship loose in the basin for field installation. For 8.5ʼwide units, the motors and drives are factory aligned and then shipped
loose inside the basin section for mounting during installation. Refer to the “External Motor Installation” section in this bulletin.
For 8.5’ wide units, the motors and drives are factory aligned and then shipped loose inside the basin section for mounting during
installation. Refer to the “External Motor Installation” section in this bulletin.
NOTE: All casing sections are factory inspected prior to shipment to verify proper fit for rigging. Please take extra care to handle and rig
unit section per the instructions of this manual to avoid possible distortion and poor casing alignment. It is advisable to check each
section upon receipt and during each lift to ensure that the factory alignment has not been altered. Should the field inspection indicate the
section alignment (“square”) has been altered, please contact the factory or your local EVAPCO representative for additional instructions
to obtain proper section fit.
Storage
Do not place tarps or other coverings over the top of the units if the units are to be stored before installation. Excessive heat can build up
if the units are covered causing possible damage to the PVC eliminators or PVC louvers. For extended storage beyond six months rotate
the fan and fan motor shaft(s) monthly. Also, the fan shaft bearings should be purged and regreases prior to start-up.
International Building Code Provisions
The International Building Code (IBC) is a comprehensive set of regulations addressing the structural design and installation
requirements for building systems – including HVAC and industrial refrigeration equipment. As of June 2008, all 50 states plus
Washington D.C have adopted the International Building Code. The code provisions require that evaporative cooling equipment and all
other components permanently installed on a structure must meet the same seismic design criteria as the building. The ATWB, eco-W
and eco-WE Closed Circuit Coolers and ATC Evaporative Condensers are IBC 2006 compliant up to 1g with standard construction and
up to 5.12g with additional structural modifications.
All items attached to the Evapco ATWB, eco-W and eco-WE Closed Circuit Cooler or ATC Evaporative Condenser must be
independently reviewed and isolated to meet applicable wind and seismic loads. This includes piping, ductwork, conduit, and electrical
connections. These items must be flexibly attached to the Evapco unit so as not to transmit additional loads to the equipment as a
result of seismic or wind forces.
Structural Steel Support
3’, 4’, 8.5’, 10’ and 12’ Wide Models
Two structural “I” beams running the length of the unit are required for supporting the unit. These beams should be located
underneath the outer flanges of the unit. (See Figure 1.)
17’, 20’ and 24’ Wide Models
Three structural “I” beams running the length of the unit are required for supporting the unit. Locate two beams underneath the
outer flanges of the unit, and locate one beam longitudinally along the center of the unit. (See Figure 2.)
All Models
Mounting holes, 3/4” in diameter, are located in the bottom flange for bolting to the structural steel (see certified print for exact bolt
hole location). Bolt the bottom section to the steel support before rigging the top section.
Beams should be sized in accordance with accepted structural practices. Maximum deflection of the beam under the unit to be
1/360 of the unit length, not to exceed 1/2”. Deflection may be calculated by using 55% of the operating weight as a uniform load
on each beam (see certified print for operating weight).
The supporting “I” beams should be level before setting the unit. Do not level the unit by shimming between the bottom flange and
the beams as this will not provide proper longitudinal support.
Note: Consult IBC 2006 for required steel support layout and structural design.

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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Rigging Basin Section
Lifting devices are located in the upper corners of the basin
section for lifting and final positioning purposes as shown in
Figures 3 and 4. The hook of the crane must be a minimum
dimension of “H” above the top of the section being lifted to
prevent undue strain on the lifting devices. See Table 1 for the
minimum “H” dimension. These lifting devices should not be
used for extended lifts or where any hazard exists unless
safety slings are employed under the section. (See “Extended
Lifts” section for proper arrangement.) Bolt the basin section to
the steel support before rigging the coil/fan section.
Figure 3 - Basin Section up to 21’ long
Figure 4 - Basin Section 24’ to 40’ long
Joining Multi-Cell Units
Basin Sections - 10’ & 12’ Wide Models (24’ to 40’ Long)
The bottom sections are shipped separately and are furnished with a connecting equalizer flume between them. In addition to the
equalizer flumes, these units are provided with drip channels and splash guards to keep water from exiting between the cells.
The equalizer flume is factory installed on one section for field
connection to the other. It is important to connect the equalizer
flume to balance the water level in the pans for proper pump
suction operation. The following procedures are to be
performed in sequence.
1. Install the basin section with the factory installed flume on
it as described earlier.
2. Clean the flanges on the equalizer flume on the end to be
field connected. Apply a layer of sealer tape on the flange
centered between the hole centers and the outside edge.
Remove paper backing strip from the sealer tape. (See
Figure 5.)
3. Clean the mating surface of the equalizer opening of any
dirt, grease or moisture.
LIFTING EARS
H
LIFTING EARS
H
VERTICAL
SPLASH
GUARD
FLUME BOX
SEALER
TAPE
DRIP
CHANNEL
Figure 5 - Equalizer Flume Connection, 12’ Wide Models
Basin Section Min. “H”
Length Dim.
3-6 Feet 8 Feet
8.5 Feet 10 Feet
9 Feet 10 Feet
10.5 Feet 11 Feet
12 Feet 15 Feet
14 Feet 17 Feet
Basin Section Min. “H”
Length Dim.
18 Feet 19 Feet
20 Feet 21 Feet
21 Feet 22 Feet
24 Feet 15 Feet
28 Feet 16 Feet
36 Feet 19 Feet
40 Feet 21 Feet
Table 1 - Minimum “H” Dimension for Basin Sections

Joining Multi-Cell Units
Basin Sections - 10’ & 12’ Wide Models (24’ to 40’ Long)
4. Rig the second basin section adjacent to the equalizer
flume on the steel support as shown in Figure 6.
5. Align the bolt holes in the equalizer flume and equalizer
opening with drift pins (drift pins provided by others) while
drawing the second basin section against the flanged
connection.
6. Install 3/8” bolts, nuts and washers in every hole around
the equalizer opening and tighten. Cut off excess sealer
tape.
7. Bolt the second basin section to the steel support.
8. Place the drip channel over the adjoining pan section
flanges. Secure by installing 5/16” self-tapping screws
through the retaining clips into the end panels. For
stainless steel construction, secure by installing 1/4”
stainless steel bolts through the retaining clips into brass
rivnuts secured in the end panel. (See Figure 7.)
9. Place the vertical splash guard in the bend of the vertical
supports. Attach the vertical splash guard using 5/16”
tappers. For stainless steel construction, attach the vertical
splash guard using 5/16” stainless steel nuts and bolts.
(See Figure 5.)
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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Joining Multi-Cell Units
Basin Sections - 17’ 20’ & 24’ Wide Models (12’ to 40’ Long)
On 17’ 20’ and 24’ wide models the equalizer flume is located
on the sides of adjoining basin sections. This flume is shipped
loose and must be installed to both basin sections. In addition
to the equalizer flume, these units are provided with drip
channels and splash guards to keep water from exiting
between the cells. The following procedure should be
performed in order to assure proper assembly.
1. Install one basin section of the unit on structural steel and
secure as described earlier.
2. Mating flanges which will make contact with others should
be cleaned to remove dirt, grease and moisture. Apply a
layer of sealer tape on one side panel centered over the
flume box holes as shown in Figure 8. Remove paper
backing strip from the sealer tape.
3. The side of the flume box which has studs installed in it
should now be connected to the side panel. The studs are
pushed through the sealer tape and holes of the side panel
and are secured by washers, lock washers and nuts. Figure 8 - Equalizer Flume Assembly, 17’ & 24’ Wide Models
FLUME
BOX
STUDS
SEALER TAPE
FACTORY INSTALLED
EQUALIZER FLUME
Figure 6 - Equalizer Flume Rigging Detail, 12’ Wide Models
TAPPERS OR
STAINLESS STEEL
BOLTS
DRIP
CHANNEL
RETAINING
RETAINING
CLIP
CLIP
RETAINING
CLIP
END PANEL
Figure 7 - Drip Channel Installation

Joining Multi-Cell Units
Basin Sections - 17’ and 24’ Wide Models (12’ to 40’ Long)
4. Clean the mating flanges on the equalizer flume on the
end to be field connected. Apply a layer of sealer tape on
the flange, centered between the hole centers and the
outside edge. Remove paper backing strip from the sealer
tape.
5. Clean the mating surface of the side panel of any dirt,
grease or moisture. Rig the second basin section adjacent
to the equalizer flume on the steel support.
6. Align the bolt holes in the equalizer flume and equalizer
opening with drift pins while drawing the second basin
section against the first as shown in Figure 8.
7. Install 3/8” bolts, nuts and washers in every hole around
the equalizer opening and tighten. Cut off excess sealer
tape to prevent strainer blockage
8. Bolt the second basin section to the steel support.
9. Place the drip channel over the adjoining pan section
flanges. Secure by installing 5/16” self-tapping screws
through the retaining clips into the side panel. For
stainless steel construction, secure by installing ¼”
stainless steel bolts through the retaining clips into brass
rivnuts secured in the side panel. (See figures 8 & 9.)
10. Fasten the drip channel sections together, end to end, by
driving a self-tapping 5/16” screw through the section end
with the larger hole into the mating end with the smaller
hole. Stainless steel units will use 5/16” stainless steel
nuts, bolts, and washers. (See Figure 9.)
11. Place the vertical splash guard in the bend of the vertical
supports. Attach the vertical splash guard using 5/16”
tappers. For stainless steel constuction, attach the vertical
splash guard using 5/16” stainless steel nuts and bolts.
(See Figure 10.)
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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Figure 9 - Drip Channel Assembly
Figure 10 - Drip Channel and Splash Guards,
17’ & 24’ Wide Models
Applying Sealer Tape
Once the bottom section has been set on the supporting steel
and bolted in place, the top flanges should be wiped down to
remove any dirt or moisture. Sealer tape should be placed over
the mounting hole centerline on the side flanges. Apply two
strips of sealer tape, one partially overlapping the other, on the
end flanges.
The sealer tape should overlap on the corners as shown in
Figure 11. Do not splice the sealer tape along the end flanges
and preferably not on the side flanges if it can be avoided.
Always remove the paper backing from the sealer tape.
Units that are 24’ to 40’ in length have two or more coil/fan
sections. In these cases, sealer must be applied to all internal
flanges. Cut off excess sealer tape once the top section has
been properly set into place and the rig is complete.
Figure 11 - Proper Sealer Tape Application
SEALER TAPE
DRIP CHANNEL SECTION
2 OVERLAPPING
LAYERS OF SEALER
ON THE ENDS
1 LAYER OF SEALER
CENTERED OVER
MOUNTING HOLE
END
SIDE

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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Coil/Fan Section
Coil Section
Four lifting ears are provided in the lower corners of most coil/fan sections for lifting into final position. 18ʼ, 20’ and 21’long sections
will have two additional lifting ears in the middle of the section. Use all lifting ears. A spreader beam must be used for lifting the top
section(s) as shown in Figures 12 and 13. The hook of the crane must be a minimum dimension “H” above the top section being
lifted to prevent undue strain on the lifting ears. See Table 2 for the minimum “H” dimension. These lifting devices should not be
used for extended lifts or where any hazard exists unless safety slings are employed under the section. (See “Extended Lifts” for
proper arrangement.)
Figure 12 - Four Point Lift
LIFTING EARS
SPREADER BEAM
H
LIFTING U-BOLTS
SPREADER BEAM
H
Figure 14 - Four Point Lift
Fan Section
Four lifting ears are provided in the lower corners of most coil/fan sections for lifting into final position. Some fan sections will have
a lifting ear located on the motor support in addition to two U-Bolts located on the top of the fan deck (See Figure 15.) Use all
lifting ears. A spreader beam must be used for lifting the top section(s) as shown in Figures 14. The hook of the crane must be a
minimum dimension “H” above the top section being lifted to prevent undue strain on the lifting ears. See Table 2 for the minimum
“H” dimension. These lifting devices should not be used for extended lifts or where any hazard exists unless safety slings are
employed under the section. (See “Extended Lifts” for proper arrangement.) Note: For 8.5ʼwide models, mount the external motor
prior to rigging as detailed in the “External Motor Installation” section.
Figure 13 - Four Point Lift
LIFTING
EARS
SPREADER BEAM
H
LIFTING EAR
LIFTING U-BOLTS
H
HOOK
Figure 15 - Three Point Lift

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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Table 2 - Minimum “H” Dimension for Coil/Fan Sections
Extended Lifts
Important: The lifting devices and “U” bolts should be used for final positioning only and for lifting where no danger exists. If they
are used for extended lifts, safety slings should be provided under the sections.
Safety slings and skids should be removed before final positioning of the unit. Refer to Tables 1 and 2 for minimum “H” dimensions.
The preferred method for extended lifts is to use slings under the unit. (See Figure 16.) Spreader bars should always be used
between the cables at the top of the section to prevent damage to the upper flanges or fan cylinders.
Figure 16 - Extended Lifts, Basin Section
SPREADER BARS
H
LIFTING
DEVICES
Fan/Coil Section Min. “H” Dimension
3-6 Feet 8 Feet
8.5 and 9 9 Feet
10.5 Feet 11 Feet
12 Feet 12 Feet
14 Feet 14 Feet
18 Feet 17 Feet
20 Feet 18 Feet
21 Feet 19 Feet
Move basin extended lift and casing
extended lift behind each standard section.

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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Assembly of the Coil Section to the Basin
Section (3’, 4’, 8.5’, 10’ and 12’ Wide Models)
Before assembling the coil section to the basin section, remove any loose parts shipped in the pan. Wipe the flanges on the
bottom of the coil section. Check to see that the water distribution and coil connections are in the correct position relative to the
basin section (see certified print). Units are also provided with match markings on each section (i.e. A1 of basin section should
match up with A1 of coil section). Place nuts and bolts in all four corner bolt holes. Then continue to install the rest of the nuts and
bolts working from the corners toward the center. Nuts and bolts
must be installed in every hole on the side flanges although none
are required on the end flanges. Drift pins are provided in rigging
box to assist with alignment.
Figure 17 - Mating Upper Section to Basin Section
Section (17’ 20’ and 24’ Wide Models)
Before assembling the coil section to the basin section, remove any loose parts shipped in the pan. Wipe the flanges on the bottom
of the coil section. Check to see that the water distribution and coil connections are in the correct position relative to the basin
section (see certified print). Units are also provided with match markings on each section (i.e. A1 of basin section should match up
with A1 of coil section). Lower the coil section to within several
inches of the basin section making sure the two sections do not
touch and the sealer is not disturbed. Gradually lower the coil/fan
section into place onto the mating flange.
Figure 18 - Mating Upper Section to Basin Section
Note: 3/8” stainless steel nuts, bolts and washers are used for
stainless steel construction. 3’, 4’ wide units use 5/16” stainless
steel nuts, bolts and washers for stainless steel construction.
Note: 3/8” stainless steel nuts, bolts and washers are used for
stainless steel construction.

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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Assembly of the Fan Section to the Coil/Basin
Section (3’, 4’, 8.5’, 10’ and 12’ Wide Models)
Before assembling the fan section to the coil/basin section, wipe the flanges on the bottom of the fan section. Check to see that the
motor access doors are in the correct position relative to the basin section (see certified print). Units are also provided with match
markings on each section (i.e. A1 of coil/basin section should match up with A1 of fan section). Place nuts and bolts in all four
corner bolt holes. Then continue to install the rest of the nuts and bolts working from the corners toward the center. Nuts and bolts
must be installed in every hole on the side flanges although none
are required on the end flanges. Drift pins are provided in rigging
box to assist with alignment.
Figure 19 - Mating Fan Section to Coil/Basin
Section (17’ 20’ and 24’ Wide Models)
Before assembling the fan section to the basin section, wipe the flanges on the bottom of the coil/fan section. Check to see that the
motor access doors are in the correct position relative to the basin section (see certified print). Units are also provided with match
markings on each section (i.e. A1 of coil/basin section should match up with A1 of fan section). Place nuts and bolts in all four
corner bolt holes. Then continue to install the rest of the nuts and
bolts working from the corners toward the center. Nuts and bolts
must be installed in every hole on the side flanges although none
are required on the end flanges. Drift pins are provided in rigging
box to assist with alignment.
Figure 20 - Mating Fan Section to Coil/Basin
Note: 3/8” stainless steel nuts, bolts and washers are used for
stainless steel construction. 3’, 4’ wide units use 5/16” stainless
steel nuts, bolts and washers for stainless steel construction.
Note: 3/8” stainless steel nuts, bolts and washers are used for
stainless steel construction.

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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Mounting Fan Screens
10’ & 12’ Wide by 12’ or 24’ Long Models
20’ & 24’ Wide by 12’ or 24’ Long Models
In certain situations some units may be shipped with the fan
screens in the basin. Under these circumstances use the
following procedures to mount the fan screen on the discharge
cylinder.
WARNING: DO NOT WALK ON THE FAN SCREENS
AT ANY TIME!
1. Place both halves of the fan screen on top of the discharge
cylinder. Each half will be tagged to match markings on the
cylinder. Align the eyelets of the fan screen with the holes
that can be found on the perimeter of the discharge
cylinder.
2. At each hole, attach the fan screen to the discharge
cylinder as shown in Figure 21.
3. Join the two screen halves with wire clips (Figure 22).
There should be 4 wire clips on each side of the fan
screen. Space the wire clips evenly across the radius of
the fan screen as shown in Figure 23.
Figure 22 - Wire Clip Arrangement
WIRE CLIP
FAN SCREEN RODS
FAN SCREEN ROD 1/2” BOLTS
FLATWASHER
LOCKWASHER
FAN CYLINDER
HEX NUTS
WIRE CLIP
Mounting Fan Screens
10’ & 12’ Wide by 14’ through 20’ Long Models
10’ & 12’ Wide by 28’ through 40’ Long Models
20’ & 24’ Wide by 14’ through 20’ Long Models
20’ & 24’ Wide by 28’ through 40’ Long Models
On these models, the fan screen is supported from underneath
by an “X” shaped support frame.
1. Set the support frame across the top of the discharge
cylinder (See Figure 24).
2. Place both halves of the fan screen on top of the support
frame. Each half will be tagged to match markings on the
cylinder. Align the eyelets of the fan screen with the holes
on the cylinder perimeter.
3. Join the two screen halves with wire clips (See Figure 22).
There should be four clips on either side of the fan
screen.Space them evenly as shown in Figure 23.
4. At each hole, attach the fan screen to the discharge
cylinder as shown in Figure 21. At the four points where the
support frame meets the cylinder, bolt the support frame to
the cylinder together with the fan screen.
Figure 24 - Support Frame Installation
FAN SCREEN
SUPPORT
FAN
CYLINDER
Figure 21 - Attaching Fan Screen to Cylinder
Figure 23 - Wire Clip Spacing

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ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Assembly of Sloped Ladders
When sloped ladders are supplied with a unit, they are shipped
in the basin of the unit. One sloped ladder will be provided for
each cell. Assembly is identical for each cell.
See Figures 26 & 27 for end and side view ladder arrangement.
Sloped ladders are attached at a minimum of three points. Taller
units will be attached at four points. At each point of attachment,
the ladder will be fitted with a ladder bracket assembly. The
ladder bracket assembly looks like a metal box and is shown in
detail (component #4) in Figure 25 below. The upper two
assembly brackets will be rigidly mounted to the ladder and are
not adjustable. These two bracket define the slope of the ladder.
The lower brackets are adjustable.
To install the ladder assembly, follow the steps outlined below
which refer to Figure 25:
1. Remove the ladder bracket mounting bolts (1) from the
ladder mounting channels (2) on pan and casing sections.
2. Loosen, but do not remove, the ladder bracket and
assembly bolts (3).
3. Slide the ladder bracket assembly (4) over the ladder
mounting channels (2) located on the pan and casing
sections. Do not remove the ladder bracket assembly (4)
from the ladder.
4. Align the bolt holes and reinstall the ladder bracket
mounting bolts (1) through the ladder bracket assembly and
the ladder mounting channels (2).
5. Tighten all bolts.
6. Tighten the adjusting screw (5) in the adjustable mounting
bracket where applicable.
NOTE: Upper Section of Unit Must Be Properly Oriented
with Respect to Lower Section. All Mounting Brackets Must
be on Same Side of Unit. Refer to Certified Print For Proper
Orientation.
LADDER MOUNTING
CHANNEL (2)
ADJUSTING SCREW
(5)
(WHEN APPLICABLE)
LADDER
BRACKET
ASSEMBLY
(4)
LADDER
BRACKET
ASSEMBLY
BOLTS
LADDER BRACKE
T
MOUNTING BOLTS
(1)
Figure 25 - Detail of Ladder, Ladder Bracket Assembly and
Mounting Channel
Figure 26 - End View of Ladder Assembly
Figure 27 - Side View of Ladder Assembly

12
ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Field Assembly of Working Platform and Ladder
The working platform/ladder assemblies are shipped in the basin of the unit. In some cases they are shipped separately due to
basin accessories that interfere with storage. The platform is partially assembled prior to shipment for minimal field assembly.
The platform and ladder assembly should be attached after the unit is fully rigged following the instructions below.
TITLE
CUT
N.C.
DRAWN
GA RAW
PART NO. REV. NO.
STAINLESS STEEL OPTION
PART NO. REV. NO.
REVISIONS
PART
NEXT
SI E
INFO.
B
ASSEMBL :
MAT'L
NO. MAT'L
RAW
NOTE:
EVAPCO, INC.
DATE
CH'KD
B
CONFIDENTIAL
This document is the property of Evapco, Inc. It should not
be copied or disclosed without prior written authorization.
SCALE
1. ALL 1/4 HOLES SHOULD BE 11/32 2. USE STAINLESS STEEL N.C. SET-UP SHEET
F F
DETAIL E
DETAIL B
DETAIL A
DETAIL C
SHIP THIS DRAWING WITH UNIT
CONNECTION PLATE
CONNECTION PLATE
SECURE DECK SUPPORT TO CONNECTION PLATES WTH 5/8 GRADE 5 HARDWARE
DECK SUPPORT
DECK SUPPORT
SECURE DIAGONAL SUPPORT TO DECK SUPPORT USING 5/8 GRADE 5 HARDWARE
DIAGONAL SUPPORT
DIAGONAL SUPPORT
SECURE DIAGONAL SUPPORT TO CONNECTION PLATE USING 5/8 GRADE 5 HARDWARE
SECURE RAILING FITTING TO FRONT TOEPLATE USING 3/8 GRADE 5 HARDWARE
FRONT TOEPLATE
RAILING FITTING
SECURE LADDER BRACKET TO BASE ON UNIT WITH 3/8 GRADE 5 HARDWARE
LADDER BRACKET
BASE
DETAIL D
NOTES:
1. PLATFORM GRATING NOT SHOWN FOR CLARIT DETAIL F
1/2 NUT
HANDRAIL FITTING
1
EB
A
C
D
FIELD ASS PLTF GENERAL ARR
03/28/01 N.T.S.
JLC 093-04342GA 3
093-04342GA 3
ADDED
DETAIL F.
JPM 7/10/02
Y
1
MADE DWG A SI E.
TLS 7/02/07
Y
2
ADDED N
OTE FAN
DECK ATTACHME
NT.
TLS 8/17/07
Y
3
FAN DECK ATTACHMENT IF APPLICABLE

13
ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
M
MOUNTING
BRACKET
MOUNTING
BRACKET
MOUNTING
BRACKET
MOUNTING CHANNEL
(SHIPS LOOSE)
ACCESS
DOOR
Figure 28
MOUNTING BRACKET
BOLT
FLATWASHER FLATWASHER
LOCKWASHER
NUT
MOUNTING CHANNEL
Figure 29
Optional Discharge Hood Damper
Section Assembly
ATWB, eco-W and eco-WE Models
Once the upper section (casing/fan section) has been secured
to the bottom section, inspect the top of the upper section to
ensure removal of any shipping blocks or other obstructions.
Lower the discharge hood damper section onto the top of the
upper section while aligning the holes located in each corner.
Place self-tapping bolts in all four corner bolt holes. Continue to
install the rest of the self-tapping bolts working from the corners
toward the center. A self-tapper must be installed in every hole
on the side flanges although none are required on the end
flanges.
NOTE: Do not use U-bolts to lift the discharge hood damper
section when attached to another part of the equipment. Always
lift the hood
Figure 30 - Mating Discharge Hood Damper Section to
Coil/Fan Section
Optional Motor and Gear Box Davit
ATWB, eco-W and eco-WE 8.5’ 10’ and 12’ Wide Models
A removable, dual point motor davit is provided on 8.5’ 10’ and 12’ wide models for both the Powerband Belt Drive System and the
optional gear drive system (Figure 28.)
This accessory is available to aid in the removal of fan motors and gear boxes. The assembly consists of a davit and a mounting
base/channel that is attached to the side of the unit next to the access door. Both of these items will ship loose in the unit’s basin.
Use the following procedure to install the mounting channel.
1. Place the mounting channel on the factory-installed mounting brackets near the access door.
2. At each hole, attached the mounting channel to the bracket using 3/8” hardware as shown in Figure 29.

14
ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
External Motor Installation
3’, 4’ & 8.5’ Wide Models (Note: 3’ & 4’ motors ship
mounted)
1. Study Figure 31 before installing the motor base on the unit.
2. Insert the lifting device into “U” bolt A on motor base B.
3. Lift the motor base and insert the pivot pin C down into hole
E and pivot pin F into hole D.
4. Install washer and nut (do not overtighten) on pivot pins.
Install jam nut on pivot pin C.
5. Insert “J” bolts G into holes H. Install flat washers and cotter
pins. Place nuts and washers on threaded portion of “J”
bolts. These will be behind the motor base installed in the
next step.
6. Insert “J” bolts into holes J in the motor base. Install flat
washers, lock washer and nuts. Remove lifting device from
the “U” bolt on the motor base. Position motor base toward
casing of unit for belt installation.
7. Install Powerband belt K (Figure 32) around fan sheave and
motor sheave. Tighten belt by adjusting nuts on “J” bolts.
Do not over tighten the belts. The center of the belt should
deflect approximately 3/4” with moderate hand pressure.
8. Measure to see that the top and bottom of the motor base
are the same distance out from the casing of the unit. This
should ensure that the sheaves are properly aligned as they
have been pre-set at the factory.
9. As a final check, lay a straight edge from sheave to sheave.
There should be four point contact. (See Figure 33.) Adjust
the position of the motor sheave as necessary.
10. To install Motor Guard L, match up hinges and install hinge
pins M. (See Figure 32.)
11. Close Motor Guard and install (2) wing bolts N.
J
J
C
G
G
H
F
E
B
D
H
A
Figure 31 - External Motor Installation
N
KM
L
N
Figure 32 - Motor Guard and Powerband Belt Installation
FAN SHEAVE
ADJUST POSITION
OF MOTOR SHEAVE
(only if necessary)
12 3 4
Figure 33 - Sheave Alignment Check

15
General Information - Start-up & Maintenance
Start-up Details
Debris
Clean all debris from the basin prior to start-up. Close and secure all access doors.
Pump Discharge Line
Connect the riser pipe from the pump discharge on the basin section to the riser pipe on the coil/fan section using the flexible
connection and hose clamps provided.
Bleed-off Line
A bleed-off line and valve are installed on the unit when shipped with a pump. On units shipped without a pump (remote sump
applications) make sure a bleed-off line and valve are properly sized and installed on the discharge side of the pump and
connected to a convenient drain. In either case, the bleed-off valve should be fully open.
Strainer
Check the strainers, if applicable, in the basin section to make certain they are in the proper location over the pump suction, along
side of the anti-vortex hood. (See Figure 34.)
Screens
Protective fan screens are provided across the top of the fan cylinders of all models. Check and tighten all bolts.
Float Valve Adjustment
The float valve is pre-set at the factory; however, adjustment should be checked after rigging. The float valve should be adjusted so
that the centerline of the float is at the measurement shown in Table 3 or 4 from the basin bottom. Raise or lower the float by using
the wing nuts on the vertical threaded rod only. Do not adjust the horizontal rod.
Starting Sequence
Before starting the unit, check that all access openings, safety screens and covers are in place. Start the unit as outlined below:
1. Fill the pan to the overflow level.
2. Bump start and check the spray water pump(s) for proper rotation. Directional arrows are found on the pump impeller housing.
3. Bump start and check the fan(s) for proper rotation. Directional arrows are placed on the side of the fan cylinder.
ANTI-VORTEXING
HOOD
STRAINER
HANDLE
STRAINER
ASSEMBLY
ANTI-VORTEXING
HOOD
STRAINER
HANDLE
STRAINER
ASSEMBLY
Figure 34 - Strainer Location
Unit Length Level
to 9’ 8”
12’ 10”
Table 3 - Float Valve Adjustment 4’ Wide Models
Unit Length Level
All Models 11”
Table 4 - Float Valve Adjustment 8.5’ through 24’ Wide Models

16
General Information - Start-up & Maintenance
Maintenance
Once the installation is complete and the unit is turned on, it is important that it be properly maintained. Maintenance is not difficult
or time-consuming but must be done regularly to assure full performance of the unit. Refer to the maintenance instructions
enclosed with the unit for proper maintenance procedures.
Freeze Protection
Proper freeze protection must be provided if the unit is located in a cold climate. Refer to maintenance instructions as well as
product bulletins for further information.
Rigging Hardware Parts List
The following table lists those parts which are shipped together with the unit(s) for field assembly and/or spare parts.
NOTES:
1. 3/8 x 1-1/2” bolt, hex nut, lockwasher, flat washer.
2. 5/16 x 1” or 3/8 x 1” tapper. Stainless units use 5/16” nuts
and bolts.
Table 5 - Rigging Hardware
ATC-B Model Box Flume Rigging Joint Sealer ZM®
ATWB Model Size Hard- Hardware Tape Nozzles
50B to 80B
24-3G to 24-5G 4x6 0 35 2 1
90B to 120B
36-3F to 36-5F 4x9 0 45 2 1
135B to 165B
48-3F to 48-5G 4x12 0 55 3 1
187B to 247B
64-3H to 64-6J 8.5x7.5 0 16 4 2
218B to 305B
77-3I to 77-6K 8.5x9 0 14 4 2
246B to 369B
89-3I to 89-6L 8.5x10.5 0 16 4 2
358B to 409B
102-3J to 102-6L 8.5x12 0 18 5 2
385B to 473B
119-3J to 119-6M 8.5x14 0 22 5 2
486B to 630B
153-3I to 153-6K 8.5x18 0 26 5 2
508B to 755B
179-3I to 179-6L 8.5x21 0 30 6 2
643B to 809B 8.5x24 22 36 10 2
800B to 950B 8.5x28 22 44 10 2
639B to 805B
204-3J to 204-6L 17x12 22 36 10 2
780B to 926B
238-3J to 238-6M 17x14 22 44 10 2
428B to 583B
144-3K to 144-6N 12x12 0 18 5 2
545B to 647B
168-3L to 168-6N 12x14 0 22 6 2
3x3 0 22 1 1
4x4 0 25 2 1
ATC-B Model Box Flume Rigging Joint Sealer ZM®
ATWB Model Size Hard- Hardware Tape Nozzles
642B to 892B
216-3L to 216-6O 12x18 0 26 6 3
791B to 967B
240-3M to 240-6P 12x20 0 30 7 3
858B to 1167B
286-3K to 286-6N 12x24 26 36 10 3
1164B to 1294B
334-3L to 334-6N 12x28 26 44 12 3
1192B to 1784B
430-3L to 430-6O 12x36 26 52 12 4
1625B to 1925B
478-3M to 478-6P 12x40 26 60 14 4
857B to 1166B
290-3K to 290-6N 24x12 26 36 10 3
1163B to 1293B
338-3L to 338-6N 24x14 26 44 12 3
1191B to 1783B
434-3L to 434-6O 24x18 26 52 12 4
1616B to 1915B
482-3M to 482-6P 24x20 26 60 14 4
1879B to 2320B
578-3K to 578-6N 24x24 26 72 20 6
2256B to 2509B
672-3L to 672-6N 24x28 26 88 24 6
2490B to 3459B
866-3L to 866-6O 24x36 26 104 24 6
2855B to 3714B
960-3M to 960-6P 24x40 26 120 28 6

17
ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Accessory Location Checklist
Accessories can ship in a variety of locations depending on the type of accessory, the size of the unit and the accessories
purchased with the unit. See Table 6 for a guide to accessory location.
Unit Accessories Shipping Location
Aluminum Ladder Shipping Location is Unit and Accessory Dependent
- If Space is Available: Strapped Inside Unit Basin
- If No Space is Available: Shipped Separately on Truck Bed
Cap Channels for Multi Cell Units Strapped Inside Unit Basin
Shipping Location is Unit Dependent
Discharge Attenuation - 4' Wide Units: Shipped Separately on Truck Bed
- 8' Wide Units and Larger: Mounted Loosely Bolted on Basin
Shipping Location is Unit Dependent
Discharge Hood with Dampers - 4' Wide Units: Shipped Separately on Truck Bed
- 8' Wide Units and Larger: Mounted Loosely Bolted on Basin
Shipping Location is Unit Dependent
Electric Basin Heater - End Mounted Heater: Installed in Unit Basin
- Side Mounted Heater: Strapped Inside Unit Basin
Shipping Location is Dependent on Control Panel Size
Electric Basin Heater Control Panel - If Space is Available: Mounted on Unit Basin
- If No Space is Available: Boxed, Wrapped and Wire Tied Inside Unit Basin
Electric Basin Heater Low Water Cutout Shipped in Rigging Box
Shipping Location is Unit Dependent
Electric Basin Heater Thermostat - End Mounted Thermostat: Mounted on Unit Basin
- Side Mounted Thermostat: Shipped in Rigging Box
Electronic Water Level Control Probes Mounted in PVC standpipe
Electronic Water Level Control PVC Standpipe Strapped Inside Unit Basin
Shipping Location is Unit and Accessory Dependent
External Service Platform with Ladder - If Space is Available: Strapped Inside Unit Basin
- If No Space is Available: Crated and Shipped Separately on Truck Bed
Factory Mounted Crossover Piping Welded to Coil Connections
Shipping Location is Unit and Accessory Dependent
Fan Screens (If not mounted) - If Space is Available: Strapped Inside Unit Basin
- If No Space is Available: Crated and Shipped Separately on Truck Bed
Shipping Location is Unit and Accessory Dependent
Fan Screen Supports (If not mounted) - If Space is Available: Strapped Inside Unit Basin
- If No Space is Available: Crated and Shipped Separately on Truck Bed
Flume Plate Mounted to Flume Box
Hot Water or Steam Coil Installed in Unit Basin
Low Water Cutoff for Pump Shipped in Rigging Box
Remote Sump Trash Screen Installed In Unit Basin
Rigging Hardware Shipped in Rigging Box
Safety Cage Attached to the Ladder
Sealer Tape Shipped in Rigging Box
Splash Guards for Multi Cell Units Strapped Inside Unit Basin
Sump Sweeper Piping with and without
High Flow Eductors Installed in Unit Basin
Shipping Location is Unit and Accessory Dependent
Vibration Isolation Rails - If Space is Available: Strapped Inside Unit Basin
- If No Space is Available: Shipped Separately on Truck Bed
Vibration Switch Mounted in Fan Section
Shipping Location is Unit and Accessory Dependent
Motor Davit and Base - If Space is Available: Strapped Inside Unit Basin
- If No Space is Available: Crated and Shipped Separately on Truck Bed
Water Level Indicator Strapped Inside Unit Basin
Water Silencers Installed in Unit Basin
Table 6 - Unit Accessory Shipping Location

18
ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Notes:

19
ATC-DC Condenser & eco-ATWB-H Closed Circuit Cooler
Notes:

EVAPCO, Inc. • P.O. Box 1300 • Westminster, MD 21158 USA
PHONE: [phone] • FAX: [phone] • E-MAIL: [email protected]
©2014 EVAPCO, Inc.
Printed on recycled paper
using soy-based ink