Trane GAM5B0A18M11EB Installation and operating instructions

Installation, Operation, and Maintenance
July 2023 18-GJ04D1-15B-EN
SAFETY WARNING
Only qualied personnel should install and service the equipment. The installation, starting up, and servicing of heating, ventilating,
and air-conditioning equipment can be hazardous and requires specic knowledge and training. Improperly installed, adjusted or
altered equipment by an unqualied person could result in death or serious injury. When working on the equipment, observe all pre-
cautions in the literature and on the tags, stickers, and labels that are attached to the equipment.
Black Epoxy Coil
GAM5B0A18M11EB
GAM5B0A24M21EB
GAM5B0B36M31EB
GAM5B0C42M31EB
GAM5B0C48M41EB
GAM5B0C60M51EB
Note: “Graphics in this document are for representation only.
Actual model may differ in appearance.”
Convertible Air Handlers
1-1/2 – 5 Ton

2
Note: Representative illustrations only included in this document. Most illustrations display the upflow configuration.
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..............................................................................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 - High Voltage................................................................................................27
Section 14. Electrical - Low Voltage ................................................................................................30
Section 15. Product Specifications .................................................................................................33
Section 16. Airflow Performance .....................................................................................................34
Section 17. Wiring Data ..................................................................................................................40
Section 18. Distance From Belly Band To Shaft Face Of Motor For Minimum Vibration .................43
Section 19. Wiring Diagram ............................................................................................................44
Section 20. Unit Outline Drawing.....................................................................................................45
Section 21. Filters............................................................................................................................46
Section 22. Start Up.........................................................................................................................46
Section 23. 2-Stage Outdoor Adjustment........................................................................................48
Section 24. Sequence of Operation.................................................................................................50
Section 25. Checkout Procedures....................................................................................................51
Section 26. Troubleshooting ............................................................................................................52
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 purchaser’s purposes, the matter should be referred to your installing dealer or local distributor.
Note: The manufacturer recommends installing ONLY A.H.R.I. approved, matched indoor and outdoor systems. Some
of the benefits of installing approved matched indoor and outdoor split systems are maximum efficiency, optimum per-
formance, and the best overall system reliability.
Note: Condensation may occur on the surface of the air handler when installed in an unconditioned space. When units are in-
stalled in unconditioned spaces, verify that all electrical and refrigerant line penetrations on the air handler are sealed completely.
Important: The GAM5 air handlers will only use the following internal electric heaters:
Important: GAM5B0C60M51EB 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.
BAYEAAC04BK1
BAYEAAC04LG1
BAYEAAC05BK1
BAYEAAC05LG1
BAYEAAC08BK1
BAYEAAC08LG1
BAYEAAC10BK1
BAYEAAC10LG1
BAYEAAC10LG3
BAYEABC15BK1
BAYEABC15LG3
BAYEABC20BK1
BAYEACC25BK1

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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 fluorides
from paint, varnish, stains, adhesives, cleaning
compounds, and cement creates a corrosive condition
which may cause rapid deterioration of the cabinet and
internal components.
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.
Important: Can not leave door panels in the sun during
installation as the extreme temperature has a tendency
to warp the plastic outer panel.
SAFETY HAZARD! Sharp Edge Hazard. Be careful
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.
WARNING
!
This product can expose you to chemicals including
lead, which are known to the State of California to case
cancer and birth defects or other reproductive harm.
For more information go to www. P65Warnings.ca.gov
PRESSURIZED REFRIGERANT! SYSTEM
CONTAINS OIL AND REFRIGERANT UNDER HIGH
PRESSURE. RECOVER REFRIGERANT TO RELIEVE
PRESSURE BEFORE OPENING THE SYSTEM.
DO NOT USE NON-APPROVED REFRIGERANTS OR
REFRIGERANT SUBSTITUTES OR REFRIGERANT
ADDITIVES.
WARNING
!
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

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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.
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 Panel Removal
The unit contains four (4) access panels: Blower/Filter,
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.
The Block off plate is removed with a 5/16” nut driver.
1. Remove the two 5/16” screws at the top of the
block off plate
2. Pull top of panel out, away from cabinet.
3. Lift panel up and off mounting bosses at the
bottom
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
)

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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.

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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 posi-
tion, 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
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
BAYWAAA05SC1AA Hydronic heater, A cabinet, no control, slide-in A
BAYWABB07SC1AA Hydronic heater, B cabinet, no control, slide-in B
BAYWACC08SC1AA Hydronic heater, C cabinet, no control, slide-in C
BAYWACC11SC1AA Hydronic heater, C cabinet, no control, external C
BAYATXV1836 R-22 TXV conversion kit GAM5B0A18-24
BAYATXV4248 R-22 TXV conversion kit GAM5B0B30-36,GAM5B0C42
BAYATXV6060 R-22 TXV conversion kit GAM5B0C48-60
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
Table 3.1

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Screw Locations
Blower Electrical Connections
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.

8
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
STEP 5 - Slide Coil assembly out of unit using built-
in coil support channels and set aside.
Coil Support
Channel

9
STEP 6 - 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 7 - 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 8 - 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 9 - Continue preparation by following the
proper carrying procedures shown in Section 5.