Trane GAF2A0A36S3AEC Assembly instructions

18-GJ47D1-5
ALL phases of this installation must comply with NATIONAL, STATE AND LOCAL CODES.
Important: This Document is customer property and is to remain with 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
approved, matched indoor and outdoor systems. Some
of the benefits of installing approved matched indoor and
outdoor split systems are maximum efficiency, optimum
performance, and the best overall system reliability.
Note: All 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: The GAM2A0C60S5ASC air handler applied
in the horizontal configuration should not exceed 2000
CFM. Airflow above 2000 CFM could result in water
blow-off. For verification, see airflow table.
50 HZ Convertible Air
Handlers 3 – 5 Ton
Black Epoxy Coil
GAF2A0A36S3AEC
Standard Coil
GAF2A0A36S3ASC
GAM2A0C48S4ASC
GAM2A0C60S5ASC
Installer’s Guide
GAF2A0A36S3AEC
GAF2A0A36S3ASC
GAM2A0C48S4ASC
GAM2A0C60S5ASC
Note: Representative illustrations only included in
this document. Most illustrations display the GAM2
upflow configuration.

2
Table of Contents
Section 1. Safety Information.......................................................................... 3
Section 2. Unit Design......................................................................................... 4
Section 3. Unit Preparation.............................................................................. 6
Section 4. Optional Cabinet Disassembly................................................ 7
Section 5. Place Unit at Location................................................................ 11
Section 6. Unit Location Considerations................................................ 12
Section 7. Setting the Unit - Vertical Installation................................. 19
Section 8. Setting the Unit - Horizontal Installation.......................... 21
Section 9. Connecting the Duct work....................................................... 22
Section 10. Refrigerant Line.......................................................................... 23
Section 11. Refrigerant Line Brazing........................................................ 24
Section 12. Condensate Drain Piping....................................................... 27
Section 13. Electrical - Low Voltage........................................................... 29
Section 14. Electrical - High Voltage.......................................................... 32
Section 15. Filters................................................................................................ 34
Section 16. Unit Outline Drawings.............................................................. 35
Section 17. Start Up............................................................................................ 37
Section 18. Sequence of Operation........................................................... 38
Section 19. Checkout Procedures.............................................................. 38

3
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 condition-
ing product may result in personal injury and/or property damage.
The manufacturer 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 instal-
lation, testing, servicing, and troubleshooting of this product, it may
be necessary to work with live electrical components. Failure to fol-
low all electrical safety precautions when exposed to live electrical
components could result in death or serious injury.
▲CAUTION
!
▲
WARNING
!
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 fluorides from paint, varnish, stains, adhesives, cleaning com-
pounds, and cement creates a corrosive condition which may cause
rapid deterioration of the cabinet and internal components.
Important: Due to the unique design of this unit, which
allows the electrical wiring to be routed within the insula-
tion, 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 accessory’s In-
staller Guide.
Important: Under no conditions should metal strapping
be attached to the unit to be used as support mecha-
nisms for carrying or suspension purposes.
SAFETY HAZARD! Sharp Edge Hazard. Be careful of sharp
edges on equipment or any cuts made on sheet metal while install-
ing 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.

4
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 insu-
lation, do not screw, cut, or otherwise puncture the unit
cabinet in any location other than the ones illustrated.
Note: Remove the cardboard from the bottom of the
blower. Cut the tie wrap and remove the foam block
located at the motor.
2.2 GAM2 Panel Removal
The GAM2 units contain four (4) access panels:
Blower/Filter, Coil, Line Set, and Heater.
The Blower/Filter panel is removed by loosening the
thumb screw knobs.
1. Unscrew knobs on Blower/Filter panel until loose
from door. Rubber washers will hold the screw
knob to the door.
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
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 ange 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 rst 3/4” of front
bottom of unit (in cross
member)
GAM2
GAF2
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
)

5
The Coil, Line Set, and Heater panels are secured in
place with Phillips head screws. Use screwdriver to
remove.
#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.

6
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.
3.2 Unit Accessories Table
2.3 GAF2 Panel Removal
GAF2 contains four panels: Blower, Coil, Line Set
and Heater. All panels are secured in place with
Phillipshead screws. Use screwdriver to remove.
Panels must be removed in the following order:
1) Coil
2) Blower
3) Heater
4) Line Set
3) Heater
2) Blower
1) Coil
4) Line Set
GAM2 Accessory Number Description Fits Cabinet Size
BAYSUPFLGCA Supply Duct Flange C C
BAYRETFLGCA Return Duct Flange C C
BAYFLR2220A High Velocity Filter Kit, 22” X 20’ X 1” (10 filters) C
TASB235SB Plenum Stand with Integrated Sound Baffle C C
BAYSRKIT100A Side Return Kit C
TASSBK235 Sound Baffle Kit 23.5” Cabinet C
BAYFRKIT235 Front Return Kit for 23.5” Cabinet C
BAYICSKIT01A Internal Condensate Switch Kit C
BAYSPEKT200A Single Point Power Entry Kit C
BAYATXV4248 R-22 TXV conversion kit GAM2A0C48S4ASC
BAYATXV6060 R-22 TXV conversion kit GAM2A0C60S5ASC
BAYHHKIT001A Horizontal Hanger Kit C
BAYUVCLK001A UVC Lights C
BAYLVKIT100A Low Voltage Conduit Entry Kit C
BAYINSKT235A Sound Insulation Kit for 23.5” Cabinet C
BAYCNDPIP01A 3/4” PVC Threaded Pipe Kit Foam Seal (10 per box) A to C
GAF2 Accessory Number 1Description Fits Cabinet Size
BAYSFSCABAA Supply Duct Flange A1 A1
BAYRETFLGAA Return Duct Flange A A1
TASB175SB Plenum Stand A with Sound Baffle A1
BAYFRKIT100 Front Return Kit A1
BAYBRFBX100 Bottom Return Filter Box A1
BAYWMKIT001 Wall Mount Kit A1
BAYLVKIT100A Low Voltage Conduit Entry Kit A1
BAYATXV1836A R-22 TXV Conversion Kit A1
BAYCNDPIP01A 3/4” PVC Threaded Pipe Kit Foam Seal (10 per box) A1
1GAF2A0A36 A1 Cabinet is one piece 17.5” wide

7
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

8
Diverter
STEP 5 - Remove airflow diverter, if present, from
the bottom of coil drain pan by gripping the plastic
diverter, using your thumbs to spread the top of the
diverter slightly outwards, and then pulling down and
out through the blower opening as illustrated.
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.
STEP 6 - Slide Coil assembly out of unit using built-
in coil support channels and set aside. Coil Support
Channel
Blower Support
Channel

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.
NOTE: FOR GAF2 MODELS, SKIP TO STEP 8.
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.

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
GAM2
GAM2
Cross Member
Unit Top Plate
GAF2
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.
GAF2A0A36S3AEC
GAF2A0A36S3ASC 39 x 17.5 x 22 NA 112
GAM2A0C48S4ASC 56.9 x 23.5 x 21.8 22 143
GAM2A0C60S5ASC 61.7 x 23.5 x 21.8 22 160
** Subtract from total height to get Coil and Heater compartment height.
Table 7.1
GAF2 GAM2
H
W
D
D
H
W

13
To p lace the unit in the configuration your application requires (upflow, horizontal right, or horizontal left), simply turn
the unit to that orientation.
Note: The air handlers are shipped from the factory suitable for three-way application.
Note: Entry for low voltage connections is allowed on either side of cabinet.
6.2 GAM2 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
To p lace the unit in the configuration your application requires (upflow, horizontal right, or horizontal left), simply turn
the unit to that orientation.
Note: The air handlers are shipped from the factory suitable for three-way application.
Note: Entry for low voltage connections is allowed on either side of cabinet.
6.3 GAF2 Three-Way Conversion
Upflow
Condensate
Drains
Refrigerant
Connections
Upflow Configuration
Low Voltage
Connections
inside unit
Airflow

16
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

17
6.4 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. Hazardous vapors can be distributed
throughout the conditioned 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).
6.5 Ducted Applications
Supply Duct
Return Duct

18
6.6 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 GAM2A0C60S5ASC air handler
applied in the horizontal configuration should not
exceed 2000 CFM. Airflow above 2000 CFM could
result in water blow-off. For verification, see airflow
table.
• Note: 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

19
Section 7. Setting the Unit - Vertical Installation
7.2 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
7.3 Upflow Installation
TASB Installation
1. Assemble the TASB using the TASB’s Installer
Guide.
Contact your distributor for TASB accessories
TASB235SB for use with 23.5” cabinets
TASB175SB for use with 17.5” cabinets
Typical TASB Installation
Airflow
AirflowAirflow
7.1 Secure Coil (GAM2 Vertical Upflow Applications)
STEP 1 - Remove Coil Panel.
STEP 2 - Remove screw from documentation packet.
STEP 3 - While the air handler is in the upflow posi-
tion, use the supplied screw to secure the coil seal
plate to cross member as shown.
Important: The Coil Seal Plate and screw secure the
coil in the center of the air handler. Failure to follow
these steps can prevent the Coil Panel from being eas-
ily replaced on the unit.

20
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