Trane TAM4A0A18S11ED Assembly instructions

18-GJ05D1-12A-EN
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES
Important: This Document is customer property and is to remain with this unit. Please return to service information
pack upon completion of work.
Important: These instructions do not cover all variations
in systems nor provide for every possible contingency to
be met in connection with the installation. Should further
information be desired or should particular problems
arise which are not covered sufficiently for the pur-
chaser’s purposes, the matter should be referred to your
installing dealer or local distributor.
Note: The manufacturer recommends installing ONLY
AHRI approved, matched indoor and outdoor systems.
Some of the benefits of installing approved matched
indoor and outdoor split systems are maximum efficien-
cy, optimum performance, and the best overall system
reliability.
Note: All AHRI ratings use a 90 second fan off delay.
Use your branded thermostat or separate relay to enable
this delay.
Note: Condensation may occur on the surface of the air
handler when installed in an unconditioned space. When
units are installed in unconditioned spaces, verify that
all electrical and refrigerant line penetrations on the air
handler are sealed completely.
Important: TAM4A0C60S51 air handler applied in
downflow or horizontal configurations should not exceed
2000 CFM. Airflow above 2000 CFM could result in
water blow-off. For verification, see airflow table.
Important: The TAM4 air handlers will only use the fol-
lowing internal electric heaters:
BAYEAAC04BK1, BAYEAAC04LG1
BAYEAAC05BK1, BAYEAAC05LG1
BAYEAAC08BK1, BAYEAAC08LG1
BAYEAAC10BK1, BAYEAAC10LG1
BAYEAAC10LG3, BAYEABC15BK1
BAYEABC15LG3, BAYEABC20BK1
BAYEACC25BK1
Convertible Air Handlers
1-1/2 – 5 Ton
Black Epoxy Coil
TAM4A0A18S11ED
TAM4A0A24S21ED
TAM4A0A30S21ED
TAM4A0A36S31ED
TAM4A0B42S31ED
TAM4A0C48S41ED
TAM4A0C60S51ED
Installer’s Guide
Standard Coil
TAM4A0A18S11SD
TAM4A0A24S21SD
TAM4A0A30S21SD
TAM4A0A36S31SD
TAM4A0B42S31SD
TAM4A0C48S41SD
TAM4A0C60S51SD
Note: Representative illustrations only included
in this document. Most illustrations display the
upflow configuration.

2
Section 1. Safety Information
WARNING
!
SAFETY HAZARD! This information is intended for
use by individuals possessing adequate backgrounds
of electrical and mechanical experience. Any attempt to
repair a central air conditioning product may result in
personal injury and/or property damage. The manufac-
turer or seller cannot be responsible for the interpreta-
tion of this information, nor can it assume any liability
in connection with its use.
LIVE ELECTRICAL COMPONENTS! During in-
stallation, testing, servicing, and troubleshooting of this
product, it may be necessary to work with live electrical
components. Failure to follow all electrical safety pre-
cautions when exposed to live electrical components
could result in death or serious injury.
WARNING
!
CAUTION
!
CORROSION HAZARD! To prevent shortening its
service life, the air handler should not be used during
the finishing phases of construction. The low return air
temperatures can lead to the formation of condensate.
Condensate in the presence of chlorides and fluo-
rides from paint, varnish, stains, adhesives, cleaning
compounds, and cement creates a corrosive condition
which may cause rapid deterioration of the cabinet and
internal components.
Table of Contents
Section 1. Safety Information ........................................................................................................... 2
Section 2. Unit Design...................................................................................................................... 3
Section 3. Unit Preparation............................................................................................................... 5
Section 4. Optional Cabinet Disassembly......................................................................................... 6
Section 5. Place Unit at Location..................................................................................................... 11
Section 6. Unit Location Considerations......................................................................................... 12
Section 7. Setting the Unit - Vertical Installation............................................................................. 17
Section 8. Setting the Unit - Horizontal Installation......................................................................... 19
Section 9. Connecting the Duct work.............................................................................................. 20
Section 10. Refrigerant Line............................................................................................................ 21
Section 11. Refrigerant Line Brazing.............................................................................................. 22
Section 12. Condensate Drain Piping.............................................................................................. 25
Section 13. Electrical - Low Voltage................................................................................................. 27
Section 14. Electrical - High Voltage............................................................................................... 30
Section 15. Filters........................................................................................................................... 33
Section 16. Unit Outline Drawing.................................................................................................... 34
Section 17. Start Up........................................................................................................................ 35
Section 18. Sequence of Operation................................................................................................ 36
Section 19. Checkout Procedures................................................................................................... 37
SAFETY HAZARD! Sharp Edge Hazard. Be care-
ful of sharp edges on equipment or any cuts made on
sheet metal while installing or servicing. Personal injury
may result.
CAUTION
!
CAUTION
!
HAZARDOUS VAPORS! Do not install an air
handler with a non-ducted return in the same closet,
alcove, or utility room as a fossil fuel device. Hazardous
vapors can be distributed throughout the conditioned
space and equipment damage can result.
Important: Panel damage can occur with prolonged
exposure to POE lubricants. Air handler front panels
that come in contact with POE oil must be washed
immediately with soapy water.
WARNING
!
This product can expose you to chemicals includ-
ing lead, which are known to the State of California to
cause cancer and birth defects or other reproductive
harm. For more information go to www.P65Warnings.
ca.gov.

3
Section 2. Unit Design
2.1 Cabinet Penetration
Important: Due to the unique design of this unit,
which allows the electrical wiring to be routed within
the insulation, do not screw, cut, or otherwise punc-
ture the unit cabinet in any location other than the
ones illustrated.
Important: Under no conditions should metal strap-
ping be attached to the unit to be used as support
mechanisms for carrying or suspension purposes.
2.2 Panel Removal
The unit contains four (4) access panels: Blower/Fil-
ter, Coil, Line Set, and Heater.
The Blower/Filter panel is removed using thumb
screws.
1. Turn thumb screws on Blower/Filter panel.
2. Pull top of panel out, away from cabinet.
3. Lift panel up out of channel.
4. Set aside.
Screws can be drilled
into bottom of unit.
(1/2” max. screw
length)
(Typical all sides)
Screws, saw cuts, and other
penetrations are allowed in
the blower section for low
voltage wiring or installation
of Side Return Kit.
(Typical both sides)
Screws are allowed up to 3- 3/4”
from the top of the cabinet
(heater compartment).
(Typical both sides)
Screws for flange kit
attachment are allowed
along the interior of
the cabinet (see arrows)
(Typical all sides)
No penetrations
allowed.
(Typical all sides)
Screws allowed only
in the first 3/4” of front
bottom of unit (in
cross member
)

4
The Coil, Line Set, and Heater panels are removed
using Phillips head screws.
#3 Size Phillips
Coil and Heater panels must be removed prior to re-
moving the Line Set panel.
To remove Coil Panel:
1. Turn screws on Coil panel.
2. Pull top of panel out, away from cabinet.
3. Pull panel up and out of channel.
4. Set aside.
To remove Heater Panel:
1. Turn screws on Heater panel.
2. Pull panel straight out, away from cabinet.
3. Set aside.
Removal of the Line Set panel is required for all refrig-
erant line brazing and some condensate line assembly
depending on your orientation.
To remove Line Set panel:
1. Remove both Heater and Coil panels.
2. Turn screws on Line Set Panel.
2. Pull panel straight out, away from cabinet.
3. Set aside.
NOTE: After replacing all panels, loosen the Line Set
Panel screws approximately 1/4 - 1/2 turn. This will
improve the seal between the Heater Panel and Line
Set Panel.

5
Accessory Number Description Fits Cabinet Size
BAYEAAC04BK1 Electric Heater, 4kW, Breaker, 24V Control, 1 Ph A to C
BAYEAAC04LG1 Electric Heater, 4kW, Lugs, 24V Control, 1 Ph A to C
BAYEAAC05BK1 Electric Heater, 5kW, Breaker, 24V Control, 1 Ph A to C
BAYEAAC05LG1 Electric Heater, 5kW, Lugs, 24V Control, 1 Ph A to C
BAYEAAC08BK1 Electric Heater, 8kW, Breaker, 24V Control, 1 Ph A to C
BAYEAAC08LG1 Electric Heater, 8kW, Lugs, 24V Control, 1 Ph A to C
BAYEAAC10BK1 Electric Heater, 10kW, Breaker, 24V Control, 1 Ph A to C
BAYEAAC10LG1 Electric Heater, 10kW, Lugs, 24V Control, 1 Ph A to C
BAYEAAC10LG3 Electric Heater, 10kW, Lugs, 24V Control, 3 Ph A to C
BAYEABC15BK1 Electric Heater, 15kW, Breaker, 24V Control, 1 Ph B to C
BAYEABC15LG3 Electric Heater, 15kW, Lugs, 24V Control, 3 Ph B to C
BAYEABC20BK1 Electric Heater, 20kW, Breaker, 24V Control, 1 Ph B to C
BAYEACC25BK1 Electric Heater, 25kW, Breaker, 24V Control, 1 Ph C
BAYSUPFLGAA Supply Duct Flange A A
BAYSUPFLGBA Supply Duct Flange B B
BAYSUPFLGCA Supply Duct Flange C C
BAYRETFLGAA Return Duct Flange A A
BAYRETFLGBA Return Duct Flange B B
BAYRETFLGCA Return Duct Flange C C
BAYSRKIT100A Side Return Kit A to C
BAYFLR1620A High Velocity Filter Kit, 16” X 20’ X 1” (10 filters) A
BAYFLR2020A High Velocity Filter Kit, 20” X 20’ X 1” (10 filters) B
BAYFLR2220A High Velocity Filter Kit, 22” X 20’ X 1” (10 filters) C
TASB175SB Plenum Stand with Integrated Sound Baffle A A
TASB215SB Plenum Stand with Integrated Sound Baffle B B
TASB235SB Plenum Stand with Integrated Sound Baffle C C
MITISRKIT1620 Side Return Kit with 16” x 20” Filter A to C
BAYFRKIT175 Front Return Kit for 17.5” Cabinet A
BAYFRKIT210 Front Return Kit for 21.0” Cabinet B
BAYFRKIT235 Front Return Kit for 23.5” Cabinet C
BAYBAFKT175 Sound Baffle Kit for 17.5” Cabinet A
BAYBAFKT210 Sound Baffle Kit for 21.0” Cabinet B
BAYBAFKT235 Sound Baffle Kit for 23.5” Cabinet C
TASSBK175 Sound Baffle Kit for 17.5” Cabinet A
TASSBK215 Sound Baffle Kit for 21.0” Cabinet B
TASSBK235 Sound Baffle Kit for 23.5” Cabinet C
BAYICSKIT01A Internal Condensate Switch Kit A to C
BAYHHKIT001A Horizontal Hanger Kit A to C
BAYUVCLK001A UVC Lights A to C
BAYLVKIT100A Low Voltage Conduit Entry Kit A to C
BAYSPEKT200A Single Point Power Entry Kit B to C
BAYINSKT175A Solcoustic® Liner Kit - 17.5" Cabinet A
BAYINSKT215A Solcoustic® Liner Kit - 21.5" Cabinet B
BAYINSKT235A Solcoustic® Liner Kit - 23.5" Cabinet C
BAYCNDPIP01A 3/4” PVC Threaded Pipe Kit Foam Seal (10 per box) A to C
Section 3. Unit Preparation
3.1 Prepare The Unit For Installation
STEP 1 - Check for damage and report promptly to
the carrier any damage found to the unit.
Note: If the unit must be transported in a horizontal
position, it must be laid on its back (marked “REAR”
on carton).
Note: After the unit is removed from the carton,
release pressure from the coil to verify coil is
pressurized and leak free.
Note: Remove the cardboard from the bottom of the
blower. Cut the tie wrap and remove the foam block
located at the motor.
Table 3.2 Unit Accessories

6
Note: If the unit must be transported in a horizontal
position, it must be laid on its back (marked “REAR”
on carton).
Note: To reassemble cabinet, follow the steps in
reverse order. Ensure electrical connections are
secure and the plug clips are engaged.
4.1 Disassemble cabinet for installation in tight areas or as needed.
Section 4. Optional Cabinet Disassembly
STEP 1 - Remove all four front panels. See Section
2.2.
STEP 2 - Remove the two screws on the seal bar and
pull the seal bar straight out.
STEP 3 - Disconnect all wiring connections routed to
the blower assembly.
Blower Electrical
Connections
Screw locations

7
STEP 4 - Slide Blower assembly out of unit using
built-in blower support channels and set aside.
Note: Remove the cardboard from the bottom of
the blower. Cut the tie wrap and remove the foam
block located at the motor.
Blower Support
Channel

8
Coil Support
Channel
STEP 6 - Slide Coil assembly out of unit using built-
in coil support channels and set aside.
STEP 7 - Use a 5/16 Allen wrench on the locking
mechanism on each side of the bottom half of the
cabinet to loosen the locking mechanism. The locks
loosen by turning counter-clockwise approximately
3/4 of a turn.
STEP 5 - Disconnect wires to the EEV motor and
sensors inside the coil assembly. Cut the wire ties
on those wire harnesses.
Note: If cut, wire ties that held the sensor must
be replaced after the coil is placed back into the
cabinet.

9
STEP 8 - Lift the Coil section up and away from the
Blower section. Set aside.
Note: When separating the two cabinet
pieces, make sure the gasket remains intact.

10
STEP 9 - For extremely tight spaces where the
cabinet needs to be rotated through a small opening,
remove the top panel. Use a manual driver to avoid
stripping screw holes.
STEP 10 - Continue preparation by following the
proper carrying procedures shown in Section 5.

11
STEP 1 - Carry the unit to the installation location.
STEP 2 - Reassemble by reversing the steps listed in
Section 4 if disassembly was required.
Important: Under no conditions should metal strap-
ping be attached to the unit to be used as support
mechanisms for carrying or suspension purposes.
Approved carrying:
1. Hold by the cross members within the cabinet
or unit top plate and use as handles for lifting
and carrying the coil and blower sections.
Cross Members
Section 5. Place Unit at Location
5.1 Carry Unit
Unit Top Plate

12
Section 6. Unit Location Considerations
6.1 Unit Dimensions and Weight
Model
Number
H x W x D
in.
**Blower
Compartment
in.
Unit
Net Weight
lbs.
TAM4A0A18S11ED
TAM4A0A18S11SD 49.9 x 17.5 x 21.8 22 113
TAM4A0A24S21ED
TAM4A0A24S21SD 49.9 x 17.5 x 21.8 22 116
TAM4A0A30S21ED
TAM4A0A30S21SD 49.9 x 17.5 x 21.8 22 117
TAM4A0A36S31ED
TAM4A0A36S31SD 49.9 x 17.5 x 21.8 22 120
TAM4A0B42S31ED
TAM4A0B42S31SD 55.7 x 21.3 x 21.8 22 133
TAM4A0C48S41ED
TAM4A0C48S41SD 56.9 x 23.5 x 21.8 22 143
TAM4A0C60S51ED
TAM4A0C60S51SD 61.7 x 23.5 x 21.8 22 160
** Subtract from total height to get Coil and Heater compartment height.
Table 7.1
D
H
W

13
To p lace the unit in the configuration your application requires (upflow, downflow, horizontal right, or horizontal left),
simply turn the unit to that orientation.
Note: The air handlers are shipped from the factory suitable for four-way application.
Note: Entry for low voltage connections is allowed on either side of cabinet.
6.2 Four-Way Conversion
Upflow
Condensate
Drains
Refrigerant
Connections
Downflow
Condensate
Drains
Downflow Configuration
Refrigerant
Connections
Airflow
Upflow Configuration
Low Voltage
Connections
inside unit
Low Voltage
Connections
inside unit
Airflow

14
Horizontal Right Configuration
Refrigerant
Connections
Horizontal Left
Condensate
Drains
Low Voltage
Connections
inside unit
Refrigerant
Connections
Horizontal Left Configuration
Low Voltage
Connections
inside unit
Horizontal Right
Condensate Drains
Airflow
Airflow

15
6.3 Non Ducted Applications
Non-Ducted Return Installations:
• Installation in a closet, an alcove, or a utility
room without a return duct requires the use
of a plenum accessory kit as it uses the area
space as a return air plenum. Minimum clear-
ances to combustible materials and service
access must be observed (see outline draw-
ing).
• This area may also be used for other purpos-
es, including an electric hot water heater, but
in no case shall a fossil fuel device be installed
and/or operated in the same closet, alcove, or
utility room.
• Review local codes to determine limitations if
the unit is installed without a return air duct.
Ducted Return
Non-Ducted
Return
Supply Duct
Plenum
Accessory
with safety guard
CAUTION
!
HAZARDOUS VAPORS! Do not install an air
handler with a non-ducted return in the same closet,
alcove, or utility room as a fossil fuel device. Hazard-
ous vapors can be distributed throughout the condi-
tioned space and equipment damage can result.
Ducted Return Installations:
• Installation in an attic, garage, or crawl space with
ducted supply and return air is appropriate. Minimum
clearances to combustible materials and service ac-
cess must be observed (see outline drawing).
6.4 Ducted Applications
Supply Duct
Return Duct

16
6.5 Additional Unit Preparation Considerations
For proper installation the following items must be con-
sidered prior to moving the unit to its installation site:
•Important: When the air handler is located adjacent
to the living area, the system should be carefully
designed with returns which minimize noise trans-
mission through the return air grill. Although the air
handler is designed with large blowers operating at
moderate speeds, any blower moving a high volume
of air will produce audible noise which could be objec-
tionable when the unit is located very close to a living
area. It is often advisable to route the return ducts
under the floor through the attic. Such design permits
the installation of air return remote from the living area
(i.e. central hall).
• Pursuant to Florida Building Code 13-610.2.A.2.1, this
unit meets the criteria for a factory sealed air handler.
• If a side return is needed for your application, the
side return MUST be installed prior to moving the air
handler to its installation location. Unless two side
returns are used, the Side Return Kit may not be on
the same side as the LV wiring entry point. See the
Side Return Kit # BAYSRKIT100A Installer Guide for
detailed instructions, if used.
• Study the unit’s outline drawing and dimensions prior
to selecting the installation site. Note in advance
which electrical conduit entry points and condensate
drain holes are to be used, so that proper clearance
allowances can be made for installation and future
maintenance.
• Installation of the air handler must be made prior to,
or at the same time as, the installation of the outdoor
unit in order to allow access for refrigerant lines.
• Consider the overall space needed when external
accessories are used, additional height and width
requirements may exist.
• These units are not approved for outdoor installation.
• These units must be installed in the proper air flow
direction.
• Any third-party heater accessories, including
hydronic coils and duct heaters must be downstream
of the unit.
• Note: No atomizing style humidifier is allowed in the
return plenum with the use of this unit.
• Excessive bypass air may cause water blow-off,
which will adversely affect system operation and air
cleaner performance. To verify bypass airflow, fol-
low the Bypass Humidifier Pre-Installation Checkout
and Set-Up Procedures available through your local
distributor. Ask for publication number 18-CH37D1-*
Steam and Flow-through Fan Power Duct-mounted
Humidifiers. Follow the humidifier installation instruc-
tions. These should only be installed on the supply
air side of the system.
•Note: The air handlers have been evaluated in accor-
dance with the Code of Federal Regulations, Chapter
XX, Part 3280 or the equivalent. “SUITABLE FOR
MOBILE HOME USE.”
• Important: The TAM4A0C60S51 air handler applied
in downflow or horizontal configurations should not
exceed 2000 CFM. Airflow above 2000 CFM could
result in water blow-off. For verification, see airflow
table.
• Note: This unit is certified to UL 1995.
The interior cabinet wall meets the following:
- UL94-5VA Flame Class Listed
- UL723 Steiner Tunnel Listed for 25/50 Flame/
Smoke
- UL746C Listed for Exposure to Ultraviolet Light,
Water Exposure and Immersion

17
Section 7. Setting the Unit - Vertical Installation
7.1 Considerations
Provide a minimum height of 14 inches for proper
unrestricted airflow below the unit. Allow a minimum
of 21 inches clearance in front of the air handler to
permit maintenance and removal of filter.
• Position unit on suitable foundation. If a manu-
facturer approved accessory is not used, a frame
strong enough to support the total weight of the
unit, accessories, and duct work must be provided.
• Isolate unit from the foundation using a suitable
isolating material.
Typical Closet Installation
7.2 Upflow Installations
Typical TASB Installation
Airflow
AirflowAirflow
TASB Installation
1. Install the TASB plenum stand with integrated
sound baffle using the TASB instructions.
Note: Kit is used for open air applications.
TASB175SB for use with 17.5” cabinets
TASB215SB for use with 21.5” cabinets
TASB235SB for use with 23.5: cabinets
MITISRKIT1620 - Side return kit with 16”x20” filter
Contact your distributor for more information.
Plenum Installation
1. Assemble the plenum using the plenum’s
Installer Guide.
Airflow
On units with sheet metal returns: Return plenum
must be flanged. Sheet metal drill point screws
must be 1/2” in length or shorter.
Typical Plenum Installation

18
7.3 Downflow Installation
• Downflow installation must comply with national,
state, and local codes.
• The air handlers are rated for zero clearance from
combustible materials.
STEP 1 - Prepare the location site as appropriate for
your application and per national, state, and local code
requirements.
STEP 2 - Set the unit in position.
Representative Illustration
Typical Downflow Installation
Important: Ensure EEV sensor and motor wiring
are taut and wire-tied to the distributor tube to pre-
vent damage during electric heat operation.
Important: For the 5 ton air handler model, tap 5
should not be used in the downflow or horizontal
orientations. Using Tap 5 could result in water
blowing off the coil.

19
8.1 Considerations
STEP 1 - Support the unit from the bottom (near both
ends). The service access must remain unobstructed.
Important: The unit can only be supported from the
bottom. Do not drill or screw supports into any area
of the cabinet.
Note: Do not allow the unit to be used as strain
relief.
• Approved bottom support methods are rails, u-
channels (Unistrut®), or other load bearing materi-
als.
• The unit must be isolated carefully to prevent
sound transmission. Field supplied vibration isola-
tors are recommended.
STEP 2 - Install an auxiliary drain pan under the
horizontal air handler to prevent possible damage to
ceilings.
• Isolate the auxiliary drain pan from the unit and
from the structure.
• Connect the auxiliary drain pan to a separate drain
line and terminate according to local codes.
Important: Due to the unique design of this unit,
which allows the electrical wiring to be routed within
the insulation, do not screw, cut, or otherwise puncture
the unit cabinet in any location other than the ones
illustrated in this Installer Guide or in an approved ac-
cessory’s Installer Guide.
Important: Make certain that the unit has been in-
stalled in a level position to ensure proper draining.
Important: Under no conditions should metal strap-
ping be attached to the unit to be used as support
mechanisms for carrying or suspension purposes.
Field Supplied
Isolators
Auxiliary Drain
Pan
Bottom Support
Near Both Ends
Section 8. Setting the Unit - Horizontal Installation
Note: BAYHHKIT001A Hanging Bracket Kit may be
ordered separately.
Important: The BAYHHKIT001A may not be used
if the cabinet has been altered per Installer Guide
18-GJ58D1-1.

20
Section 9. Connecting the Duct work
9.1 Duct Connection Considerations
• The supply and return air ducts must be connected
to the unit with non flammable duct connectors.
• See the Outline drawing for sizes of the duct con-
nections.
• After the ducts are secured, seal around the sup-
ply and return ducts to prevent air leakage.
• Insulate all duct work that will be outside of condi-
tioned spaces.
• Convertible Duct Flange Kits are available to con-
nect the supply plenum or for mounting on the
discharge opening to provide a “flush fit” for 1-1/2”
duct board applications.
• If front or rear return is required, the air handler
must be elevated - placed on a pedestal or plenum
and duct must be connected to this pedestal or
plenum.
• If side return is required, the Side Return Kit #
BAYSRKIT100A accessory must be used. A re-
mote filter will be required.
• To ensure maximum efficiency and system perfor-
mance, the existing supply and return duct system
static pressures must not exceed the total available
static pressure of the air handler. Reference ACCA
Manual D, Manual S and Manual RS along with
the air handler Product Data and Service Facts for
additional information.
Note: Side return is not approved without Side
Return Kit # BAYSRKIT100. More than one Side
Return Kit may be necessary depending on the
application. Refer to the Installation Guide in
BAYSRKIT100 for approved duct connections,
sizing, number, transitions, and accessory
application.
Note: Duct work must be supported as appropriate.
See National and local codes for guidelines. Do not
depend on the unit to support duct work.
Important: Due to the unique design of this unit,
which allows the electrical wiring to be routed within
the insulation, do not screw, cut, or otherwise punc-
ture the unit cabinet in any location other than the
ones illustrated in this Installer Guide or in an ap-
proved accessory’s Installer Guide.
Important: Under no conditions should metal strap-
ping be attached to the unit to be used as support
mechanisms for carrying or suspension purposes.
Important: On units with sheet metal returns: Return
air plenum must be flanged. Sheet metal drill point
screws must be 1/2” in length or shorter.
Screws allowed in
first 3/4” of bottom
cross member.
3/4”