Trane TAMXB0A24V21DB Installation and operating instructions

SSAAFFEETTYY WWAARRNNIINNGG
Only qualified 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 specific knowledge and training Improperly installed, adjusted or altered equipment by an unqualified person
could result in death or serious injury When working on the equipment, observe all precautions in the literature and on the tags, stickers, and labels that
are attached to the equipment
July 2023 1188--GGJJ8899DD11--11FF--EENN
Variable Speed Air Handlers
Convertible 2 — 5 Ton
TAMXB0A24V21DB
TAMXB0B30V31DB
TAMXB0C36V31DB
TAMXB0C42V41DB
TAMXB0C48V41DB
TAMXB0C60V51DB
TM
The Diagnostics Mobile App is available by scanning a
QR code located inside this unit or by searching for the
Link Diagnostics App in your App Store.
NNoottee:: Graphics in this document are for representation only. Actual model
may differ in appearance.”
NNoottee:: For use with BAYEA series heaters ONLY.
NNoottee:: This unit can be used in Link Communicating mode or 24 volt mode.
NNoottee:: Need to use Diagnostics App to configure blower delays and
accessories etc., in 24 volt mode.
Installation, Operation, and Maintenance

©2023 18-GJ89D1-1F-EN
SAFETY SECTION
AI HANDLE S
IImmppoorrttaanntt — This document contains a wiring
diagram, a parts list, and service information This is
customer property and is to remain with this unit
Please return to service information pack upon
completion of work
WWAARRNNIINNGG
HHAAZZAARRDDOOUUSS VVOOLLTTAAGGEE!!
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CCAAUUTTIIOONN
SSHHAARRPP EEDDGGEE HHAAZZAARRDD!!
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sseerrvviicciinngg
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iinncclluuddiinngg lleeaadd,, wwhhiicchh aarree kknnoowwnn ttoo tthhee SSttaattee ooff
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ttoo wwwwww PP6655WWaarrnniinnggss ccaa ggoovv
IImmppoorrttaanntt:: 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.
IImmppoorrttaanntt:: The TAMX air handlers are only compatible
with BAYEA** internal electric heaters.
NNoottee:: Representative illustrations only included in this
document. Most illustrations display the upflow
configuration.

18-GJ89D1-1F-EN 3
Installer Guide Notes 4
Unit Design 5
Unit Install Preparation 7
Optional Accessories 8
Optional Cabinet Disassembly 9
Placing Unit at Location 13
Unit Location Considerations 14
Four-Way Conversion 15
Ducted and Non-Ducted Return
Applications 17
Additional Unit Preparation
Considerations 18
Setting the Unit — Vertical
Installation 19
Setting the Unit — Horizontal
Installations 21
Connecting the Duct work 22
Refrigerant Line 23
Refrigerant System Layout 23
Refrigerant Line Brazing 24
Condensate Drain Piping 27
Electrical — High Voltage 29
Electrical — Low Voltage 32
Replacement AHC configuration – 24
volt mode 41
Button Press AHC Configuration
Method: Method #2 42
Replacement AHC configuration — LINK
Communicating Mode: 42
Product Specifications 43
Heater Attribute Data 51
Distance from Belly Band to Shaft Face
of Motor for Minimum Vibration 54
Wiring 55
Outline Drawing 56
Filters 57
System Start Up 58
System Charge Adjustments 58
Fault Reporting 59
Stepper Motor Tables—For use with
Low and High Superheat
Troubleshooting 60
Unit Test Options 61
ET / GT and Supply Air Temperature
Sensor 62
Return Air Temperature Sensor 63
Sequence of Operation 64
Abbreviations 64
Checkout Procedures 66
Troubleshooting 67
Notices 72
Table of Contents
TAMX Air Flow Performance Table . . . . . . . . 45

418-GJ89D1-1F-EN
Installer Guide Notes
AALLLL PPhhaasseess ooff tthhiiss iinnssttaallllaattiioonn mmuusstt ccoommppllyy wwiitthh
NNAATTIIOONNAALL,, SSTTAATTEE aanndd LLOOCCAALL CCOODDEESS!!
IImmppoorrttaanntt:: This Document is customer property and is
to remain with t his unit. Please return to
service information upon completion of
work
IImmppoorrttaanntt:: 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.
IImmppoorrttaanntt:: The 24 volt low voltage wire harness is
shipped in the supplied document pack.
NNoottee:: 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
performance, and the best overall system
reliability.
NNoottee:: Condensation may occur on the surface of the air
handler when installed in unconditioned spaces,
verify that all electrical and refrigerant line
penetrations on the air handler are sealed
completely.
The TAMX air handlers will only use the following
internal electric heaters:
BAYEAAC04BK1 BAYEAAC10LG1
BAYEAAC04LG1 BAYEAAC10LG3
BAYEAAC05BK1 BAYEABC15BK1
BAYEAAC05LG1 BAYEABC15LG3
BAYEAAC08BK1 BAYEABC20BK1
BAYEAAC08LG1 BAYEACC25BK1
BAYEAAC10BK1
NNoottee:: Duct heaters cannot be applied with this air
handler.
NNoottee:: The heater size will be automatically configured
by installing a resistor in the Electric heat
harness located in the electric heat compartment
and will be included with the BAYEA heater.

18-GJ89D1-1F-EN 5
Unit Design
Table 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 puncture the unit cabinet in any
location other than the ones illustrated.
Important: Under no conditions should metal strapping be attached
to the unit to be used as support mechanisms for
carrying or suspension purposes.
Screws can be drilled
into bottom of unit.
(1/2” max. screw
length)
(Typical all sides)
Screws, saw cuts,
and other penetra-
tions 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 flange kit
attachment are allowed
along the interior of
thecabinet (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)
Table 2. Panel emoval
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.

618-GJ89D1-1F-EN
The Coil, Line Set, and Heater panels are removed using Phillips head
screws.
Removal requires #3 Size Phillips
Coil and Heater panels must be removed prior to removing the Line
Set panel.
To remove Coil Panel:
1. Turn screws on Coil panel.
2. Rotate bottom of panel away from cabinet.
3. Remove panel from 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 refrigerant 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.
3. Pull panel straight out, away from cabinet.
4. 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.
UUnniitt DDeessiiggnn

18-GJ89D1-1F-EN 7
Unit Install Preparation
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 unit is removed from the carton, verify coil is pressurized.
Carefully remove the liquid line plug. If no pressure is released,
check for leaks.
Note: Remove the cardboard from the bottom of the blower. Cut the
tie wrap and remove the foam shipping block located at the
motor.
Note: Remove the ANA foam found between the blower and
evaporator coil.
ANA
Foam

818-GJ89D1-1F-EN
Optional Accessories
Accessory Number Description Fits Cabinet Size (a)
BAYEAAC04BK1 Electric Heater, 4kW, Breaker, 24V Control, 1 Ph A to C
BAYEAAC04LG1 Electric Heater, 4kW, Lugs, 24VControl, 1 Ph A to C
BAYEAAC05BK1 Electric Heater, 5kW, Breaker, 24V Control, 1 Ph A to C
BAYEAAC05LG1 Electric Heater, 5kW, Lugs, 24VControl, 1 Ph A to C
BAYEAAC08BK1 Electric Heater, 8kW, Breaker, 24V Control, 1 Ph A to C
BAYEAAC08LG1 Electric Heater, 8kW, Lugs, 24VControl, 1 Ph A to C
BAYEAAC10BK1 Electric Heater, 10kW, Breaker, 24V Control, 1 Ph A to C
BAYEAAC10LG1 Electric Heater, 10kW, Lugs, 24VControl, 1 Ph A to C
BAYEABC15BK1 Electric Heater, 15kW, Breaker, 24V Control, 1 Ph B to C
BAYEABC20BK1 Electric Heater, 20kW, Breaker, 24VControl, 1 Ph C
BAYEACC25BK1 Electric Heater, 25kW, Breaker, 24V Control, 1 Ph C
BAYEAAC10LG3 Electric Heater, 10kW, Lugs, 24VControl, 3 Ph A to C
BAYEABC15LG3 Electric Heater, 15kW, Lugs, 24V Control, 3 Ph B to 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 (b) (c) 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
MITISRKIT01A 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
TAYBASETAMA Downflow Sub-Base Kit A to C
BAYBAFKT175A (d) Sound Baffle Kit for 17.5” Cabinet A
BAYBAFKT215A Sound Baffle Kit for 21.0” Cabinet B
BAYBAFKT235A Sound Baffle Kit for 23.5” Cabinet C
TASSBK175 (e) (f) Sound Baffle Kit for 17.5” Cabinet A
TASSBK210 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 Power Entry Kit A to C
BAYWAAA05SC1AA Hydronic Coil — 50,000 BTUH — Slide-in A to A
BAYWABB07SC1AA Hydronic Coil — 70,000 BTUH — Slide-in B to B
BAYWACC08SC1AA Hydronic Coil — 80,000 BTUH — Slide-in C to C
BAYWACC11SC1AA Hydronic Coil — 100,000 BTUH — Add on C to C
BAYWACNTKT05 Relay Kit for use with BAYWAAA05SC1A A
BAYWACNTKT07 Relay Kit for use with BAYWABB07SC1A B
BAYWACNTKT08 Relay Kit for use with BAYWACC08SC1A C
BAYWACNTKT11 Relay Kit for use with BAYWACC11SC1A C
BAYINSKT175A Solcoustic® Liner Kit for 17.5” cabinet A
BAYINSKT215A Solcoustic® Liner Kit for 21.5” cabinet B
BAYINSKT235A Solcoustic® Liner Kit for 23.5” cabinet C
BAYCNDPIP01A 3/4” PVC Threaded Pipe Kit foam Seal (10 per box) A to C
BAYSENSC360 Supply Air Temperature Sensor A to C
BAYAHPTKT Return Air Pressure Transducer A to C
(a) A Cabinet is 17.5” wide, B Cabinet is 21.5” wide, C Cabinet is 23.5” wide.
(b) Contact your distributor for information.
(c) In open air applications, the plenum stand with sound baffle provides sound reduction.
(d) Mounts inside air handler filter channel.
(e) In return plenum applications, use TASSBK for sound reduction.
(f) Mounts to TASB original plenum stand without integrated baffle.

18-GJ89D1-1F-EN 9
Optional Cabinet Disassembly
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.
1. Remove all four front panels.
2. Remove the two screws on the seal bar and pull the seal bar
straight out.
3. Disconnect all wiring connections routed to the blower assembly.
a. Disconnect the air pressure hose.
Note: Remove the cardboard from the bottom of the blower. Cut the
tie wrap and remove the foam block located at the motor.
Note: Remove ANA Foam from under the upflow drainpan.
Screw Locations
Blower Electrical Connections
ANA FOAM
4. Slide Blower assembly out of unit using built-in blower support
channels and set aside.
5. Disconnect wires to the EEV motor and sensors. Cut the wire ties on
those wire harnesses if necessary and replace after re-installing.
Note: If cut, wire ties that held the sensor must be replaced after the coil is
placed back into the cabinet.

10 18-GJ89D1-1F-EN
6. Slide Coil assembly out of unit using built-in coil support channels
and set aside
Coil Support
Channel
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.
OOppttiioonnaall CCaabbiinneett DDiissaasssseemmbbllyy

18-GJ89D1-1F-EN 11
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.
OOppttiioonnaall CCaabbiinneett DDiissaasssseemmbbllyy

12 18-GJ89D1-1F-EN
9. For extremely tight spaces where the cabinet needs to be rotated
through a small opening, remove the top panel and all cross
members. Use a manual driver to avoid stripping screw holes.
10. Continue preparation by following the proper carrying procedures shown in the next section.
OOppttiioonnaall CCaabbiinneett DDiissaasssseemmbbllyy

18-GJ89D1-1F-EN 13
Placing Unit at Location
1. Carry the unit to the installation location
2. Reassembly by reversing the steps listed in Section 4 if
disassembly was required. If cut, wire ties that held the sensor
wiring must be replaced.
Important: Under no conditions should metal strapping be attached
to the unit to be used as support mechanisms for carrying
or suspension purposes.
Approved Carrying:
• 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

14 18-GJ89D1-1F-EN
Unit Location Considerations
Table 3. Unit Dimensions and Weight
MODEL NUMBER H x W x D
(inches)
Coil and Heater
Compartment
Height *
(inches)
Unit Net Weight
(pounds)
D
H
W
TAMXB0A24V21DB 49.9 x 17.5 x 21.8 28.1 120
TAMXB0B30V31DB 55.7 x 21.3 x 21.8 33.9 133
TAMXB0C36V31DB 56.9 x 23.5 x 21.8 35.1 143
TAMXB0C42V41DB 56.9 x 23.5 x 21.8 35.1 158
TAMXB0C48V41DB 61.7 x 23.5 x 21.8 39.9 174
TAMXB0C60V51DB 61.7 x 23.5 x 21.8 39.9 178
* Blower compartment height is 21.8 inches.

18-GJ89D1-1F-EN 15
Four-Way Conversion
To place the unit in the configuration your application requires (upflow, downflow, horizontal right, or horizontal left), simply turn the unit to
that orientation. Remember to adjust the badge accordingly.
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. Refer to Table 17.
Airflow
Upflow Configuration
Refrigerant
Connections
Upflow
Condensate
Drains
Airflow
Dowflow Configuration
Refrigerant
Connections
Downflow
Condensate
Drains

16 18-GJ89D1-1F-EN
Horizontal Left Configuration
Airflow
Refrigerant
Connections
Horizontal Left
Condensate
Drains
Horizontal Right Configuration
Airflow
Refrigerant
Connections
Horizontal Left
Condensate
Drains
FFoouurr--WWaayy CCoonnvveerrssiioonn

18-GJ89D1-1F-EN 17
Ducted and Non-Ducted eturn Applications
Table 4. Non-Ducted Applications
CCAAUUTTIIOONN
HHAAZZAARRDDOOUUSS VVAAPPOORRSS!!
FFaaiilluurree ttoo ffoollllooww tthhiiss CCaauuttiioonn ccoouulldd rreessuulltt iinn
pprrooppeerrttyy ddaammaaggee oorr ppeerrssoonnaall iinnjjuurryy
HHaazzaarrddoouuss vvaappoorrss ccaann bbee ddiissttrriibbuutteedd tthhrroouugghhoouutt tthhee
ccoonnddiittiioonneedd ssppaaccee aanndd eeqquuiippmmeenntt ddaammaaggee ccaann
rreessuulltt DDoo nnoott iinnssttaallll aann aaiirr hhaannddlleerr wwiitthh aa nnoonn--
dduucctteedd rreettuurrnn iinn tthhee ssaammee cclloosseett,, aallccoovvee,, oorr uuttiilliittyy
rroooomm aass aa ffoossssiill ffuueell ddeevviiccee
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 clearances to
combustible materials and service access must be observed (see
outline drawing).
• This area may also be used for other purposes, 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.
Supply Duct
Plenum
Accessory with
Safety Guard
Non-Ducted
Return
Table 5. Ducted eturn Installations.
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 access must be observed (see outline
drawing).
Supply Duct
Return Duct
Ducted
Return

18 18-GJ89D1-1F-EN
Additional Unit Preparation Considerations
For proper installation the following items must be
considered prior to moving the unit to its installation
site:
• Pursuant to Florida Building Code 13–610 2A 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 prepared prior to moving the
air handler to its installation location See the Side
Return Kit #BAYSRKIT100A Installer Guide for
detailed instructions, if used
• When the air handler is located adjacent to the
living area, the system should be carefully designed
with returns which minimize noise transmission
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 objectionable 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)
• 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 or hydronic coils
must be downstream of the unit
NNoottee:: 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,
follow 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 instructions These should only be
installed on the supply air side of the system
NNoottee:: The air handlers have been evaluated in
accordance with the Code of Federal Regulations,
Chapter XX, Part 3280 or the equivalent.
SUITABLE FOR MOBILE HOME USE.”
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— 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

18-GJ89D1-1F-EN 19
Setting the Unit — Vertical Installation
Table 6. 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 manufacturer 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.
Note: The following sound insulation kits are available to lessen
objectionable sound.
BAYINSKT175A for use with 17.5” cabinets
BAYINSKT215A for use with 21.5” cabinets
BAYINSKT235A for use with 23.5” cabinets
Typical Closet Installation
Table 7. Upflow Installation
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” x 20” filter
Contact your distributor for more information.
Note: The following sound insulation kits are available to lessen
objectionable sound.
BAYINSKT175A for use with 17.5” cabinets
BAYINSKT215A for use with 21.5” cabinets
BAYINSKT235A for use with 23.5” cabinets
Airflow
Airflow
Airflow
Typical TASB Installation

20 18-GJ89D1-1F-EN
Table 8. Plenum Installation
2. Assemble the plenum using the plenum’s Installer Guide.
On units with sheet metal returns: Return plenum must be flanged.
Sheet metal drill point screws must be 1/2” in length or shorter.
Airflow
Typical Plenum Installation
Table 9. Downflow Installation
• Downflow installation must comply with national, state, and local
codes.
3. Prepare the location site as appropriate for your application and
per national, state, and local code requirements.
4. Set the unit in position.
Typical Downflow Installation
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