Trane TAM7A0A24H21SC Assembly 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.
November 2013 18-GJ06D2-2A
Air Handlers
Convertible 2 — 5 Ton
TAM7A0A24H21SC
TAM7A0B30H21SC
TAM7A0C36H31SC
TAM7A0C42H31SC
TAM7A0C48H41SC
TAM7B0C60H51SB
Scan or click to view
TAM7 Trouble
Shooting Video
Library
Installer’s Guide

©2012 Trane 18-GJ06D2-2A
SAFETY SECTION
AIR HANDLERS
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!!
FFaaiilluurree ttoo ffoollllooww tthhiiss WWaarrnniinngg ccoouulldd rreessuulltt iinn
pprrooppeerrttyy ddaammaaggee,, sseevveerree ppeerrssoonnaall iinnjjuurryy,, oorr ddeeaatthh..
DDiissccoonnnneecctt aallll eelleeccttrriicc ppoowweerr,, iinncclluuddiinngg rreemmoottee
ddiissccoonnnneeccttss bbeeffoorree sseerrvviicciinngg.. FFoollllooww pprrooppeerr
lloocckkoouutt//ttaaggoouutt pprroocceedduurreess ttoo eennssuurree tthhee ppoowweerr
ccaannnnoott bbee iinnaaddvveerrtteennttllyy eenneerrggiizzeedd..
CCAAUUTTIIOONN
GGRROOUUNNDDIINNGG RREEQQUUIIRREEDD!!
FFaaiilluurree ttoo iinnssppeecctt oorr uussee pprrooppeerr sseerrvviiccee ttoooollss mmaayy
rreessuulltt iinn eeqquuiippmmeenntt ddaammaaggee oorr ppeerrssoonnaall iinnjjuurryy..
RReeccoonnnneecctt aallll ggrroouunnddiinngg ddeevviicceess.. AAllll ppaarrttss ooff tthhiiss
pprroodduucctt tthhaatt aarree ccaappaabbllee ooff ccoonndduuccttiinngg eelleeccttrriiccaall
ccuurrrreenntt aarree ggrroouunnddeedd.. IIff ggrroouunnddiinngg wwiirreess,, ssccrreewwss,,
ssttrraappss,, cclliippss,, nnuuttss,, oorr wwaasshheerrss uusseedd ttoo ccoommpplleettee aa
ppaatthh ttoo ggrroouunndd aarree rreemmoovveedd ffoorr sseerrvviiccee,, tthheeyy mmuusstt
bbee rreettuurrnneedd ttoo tthheeiirr oorriiggiinnaall ppoossiittiioonn aanndd pprrooppeerrllyy
ffaasstteenneedd..
WWAARRNNIINNGG
LLIIVVEE EELLEECCTTRRIICCAALL CCOOMMPPOONNEENNTTSS!!
FFaaiilluurree ttoo ffoollllooww tthhiiss WWaarrnniinngg ccoouulldd rreessuulltt iinn
pprrooppeerrttyy ddaammaaggee,, sseevveerree ppeerrssoonnaall iinnjjuurryy,, oorr ddeeaatthh..
FFoollllooww aallll eelleeccttrriiccaall ssaaffeettyy pprreeccaauuttiioonnss wwhheenn
eexxppoosseedd ttoo lliivvee eelleeccttrriiccaall ccoommppoonneennttss.. IItt mmaayy bbee
nneecceessssaarryy ttoo wwoorrkk wwiitthh lliivvee eelleeccttrriiccaall ccoommppoonneennttss
dduurriinngg iinnssttaallllaattiioonn,, tteessttiinngg,, sseerrvviicciinngg,, aanndd
ttrroouubblleesshhoooottiinngg ooff tthhiiss pprroodduucctt..
WWAARRNNIINNGG
PPRREESSSSUURRIIZZEEDD RREEFFRRIIGGEERRAANNTT!!
FFaaiilluurree ttoo ffoollllooww tthhiiss WWaarrnniinngg ccoouulldd rreessuulltt iinn
ppeerrssoonnaall iinnjjuurryy
SSyysstteemm ccoonnttaaiinnss ooiill aanndd rreeffrriiggeerraanntt uunnddeerr hhiigghh
pprreessssuurree.. RReeccoovveerr rreeffrriiggeerraanntt ttoo rreelliieevvee pprreessssuurree
bbeeffoorree ooppeenniinngg tthhee ssyysstteemm.. DDoo nnoo uussee nnoonn--
aapppprroovveedd rreeffrriiggeerraannttss oorr rreeffrriiggeerraanntt ssuubbssttiittuutteess oorr
rreeffrriiggeerraanntt aaddddiittiivveess..
CCAAUUTTIIOONN
SSHHAARRPP EEDDGGEE HHAAZZAARRDD!!
FFaaiilluurree ttoo ffoollllooww tthhiiss CCaauuttiioonn ccoouulldd rreessuulltt iinn
pprrooppeerrttyy ddaammaaggee oorr ppeerrssoonnaall iinnjjuurryy..
BBee ccaarreeffuull ooff sshhaarrpp eeddggeess oonn eeqquuiippmmeenntt oorr aannyy
ccuuttss mmaaddee oonn sshheeeett mmeettaall wwhhiillee iinnssttaalllliinngg oorr
sseerrvviicciinngg..
NNoottee:: Representative illustrations only included in this
document. Most illustrations display the upflow
configuration.

18-GJ06D2-2A 3
Installer Guide Notes . . . . . . . . . . . . . . . . . . . . . . . 4
Unit Design. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Unit Install Preparation . . . . . . . . . . . . . . . . . . . . . 7
Optional Equipment . . . . . . . . . . . . . . . . . . . . . . . . 8
Optional Cabinet Disassembly. . . . . . . . . . . . . . 9
Placing Unit at Location . . . . . . . . . . . . . . . . . . . 14
Unit Location Considerations . . . . . . . . . . . . . . 15
Four-Way Conversion. . . . . . . . . . . . . . . . . . . . . . 16
Ducted and Non-Ducted
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Additional Unit Preparation
Considerations . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Setting the Unit — Vertical
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Setting the Unit — Horizontal
Installations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Connecting the Duct work . . . . . . . . . . . . . . . . . 24
Refrigerant Line . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Refrigerant System Layout . . . . . . . . . . . . . . . 25
Refrigerant Line Brazing . . . . . . . . . . . . . . . . . . . 26
Condensate Drain Piping . . . . . . . . . . . . . . . . . . 29
Electrical — Low Voltage . . . . . . . . . . . . . . . . . . 31
Dip Switches . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Indoor Blower Options . . . . . . . . . . . . . . . . . . . . 40
Control Plate Reinstall . . . . . . . . . . . . . . . . . . . . . 41
Electrical — High Voltage . . . . . . . . . . . . . . . . . . 42
TAM7 OUTLINE DRAWING . . . . . . . . . . . . . . . . 45
Filters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
System Charge Adjustments . . . . . . . . . . . . . 46
System Start Up . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
TAM7 Sequence of Operation . . . . . . . . . . . . . 48
Abbreviations . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Checkout Procedures . . . . . . . . . . . . . . . . . . . . . . 50
Table of Contents

418-GJ06D2-2A
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 or local distributor.
SSeeee TTAAMM77 SSeerrvviiccee FFaaccttss ddooccuummeenntt ffoorr iinnffoorrmmaattiioonn
oonn rreeaaddiinngg tthhee CCoonnttrrooll BBooaarrdd LLEEDDss,, AAiirr FFllooww TTaabblleess
aanndd TTrroouubblleesshhoooottiinngg FFlloowwcchhaarrttss..
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 TAM7 air handlers will only use the following
internal electric heaters:
BAYEVAC04BK1AA BAYEVAC10LG1AA
BAYEVAC04LG1AA BAYEVBC15BK1AA
BAYEVAC05BK1AA BAYEVBC20BK1AA
BAYEVAC05LG1AA BAYEVCC25BK1AA
BAYEVAC08BK1AA BAYEVAC10LG3AA
BAYEVAC08LG1AA BAYEVBC15LG3AA
BAYEVAC10BK1AA
NNoottee:: Duct heaters cannot be applied with this air
handler.

18-GJ06D2-2A 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.
Screws are allowed up to 3- 3/4”
from the top of the cabinet
(heater compartment).
(Typical both sides)
Screws for flange kit
attachm ent 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 m ember)
Table 2. Panel Removal
The unit contains four (4) access panels: Blower/Filter, Coil, Line Set,
and Heater.
The Blower/Filter panel is removed using 1/4 turn 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.

618-GJ06D2-2A
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. Pull bottom of panel out, away from cabinet.
3. Pull panel down 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.
00
0
0
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-GJ06D2-2A 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, depress the Schrader
valve, if equipped, to verify coil is pressurized. For units with
rubber plugs in both suction and liquid lines, carefully remove
the liquid line plug first. If no pressure is released, check for
leaks.
Note: Remove the shipping block from the blower compartment.

818-GJ06D2-2A
Optional Equipment
Accessory Number Description Fits Cabinet Size
BAYEVAC04BK1AA Electric Heater, 4kW, Breaker, RS-485 Control, 1 Ph A to C
BAYEVAC04LG1AA Electric Heater, 4kW, Lugs, RS-485 Control, 1 Ph A to C
BAYEVAC05BK1AA Electric Heater, 5kW, Breaker, RS-485 Control, 1 Ph A to C
BAYEVAC05LG1AA Electric Heater, 5kW, Lugs, RS-485 Control, 1 Ph A to C
BAYEVAC08BK1AA Electric Heater, 8kW, Breaker, RS-485 Control, 1 Ph A to C
BAYEVAC08LG1AA Electric Heater, 8kW, Lugs, RS-485 Control, 1 Ph A to C
BAYEVAC10BK1AA Electric Heater, 10kW, Breaker, RS-485 Control, 1 Ph A to C
BAYEVAC10LG1AA Electric Heater, 10kW, Lugs, RS-485 Control, 1 Ph A to C
BAYEVBC15BK1AA Electric Heater, 15kW, Breaker, RS-485 Control, 1 Ph B to C
BAYEVBC20BK1AA Electric Heater, 20kW, Breaker, RS-485 Control, 1 Ph C
BAYEVCC25BK1AA Electric Heater, 25kW, Breaker, RS-485 Control, 1 Ph C
BAYEVAC10LG3AA Electric Heater, 10kW, Lugs, RS-485 Control, 3 Ph A to C
BAYEVBC15LG3AA Electric Heater, 15kW, Lugs, RS-485 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 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
BAYBAFKT175A 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 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
BAYWVAA05SC1AA Hydronic Coil — 50,000 BTUH — Slide-in with control A to A
BAYWVBB07SC1AA Hydronic Coil — 70,000 BTUH — Slide-in with control B to B
BAYWVCC08SC1AA Hydronic Coil — 80,000 BTUH — Slide-in with control C to C
BAYWACC11SC1AA Hydronic Coil — 100,000 BTUH — Add on C to C
BAYWVBRD485A RS-485 Control for BAYWACC11SC1AA C to 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

18-GJ06D2-2A 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.
See Table 2, p. 5
Blo
wer Electrical
Connections

10 18-GJ06D2-2A
2. Disconnect the two wiring connections routed to the blower
assembly.
3. Slide Blower assembly out of unit using built-in blower support
channels and set aside.
Wiring
Connecti ons
Blower Support
Channel
4. Remove airflow diverter from the bottom of coil drain pan by
gripping the plastic diverter while using your thumbs to spread
the top of the diverter slightly outwards and then pulling down
and out through the blower opening as illustrated.
OOppttiioonnaall CCaabbiinneett DDiissaasssseemmbbllyy

18-GJ06D2-2A 11
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.
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

12 18-GJ06D2-2A
8. Lift the Coil section up and away from the Blower section. Set
aside.
1
2
OOppttiioonnaall CCaabbiinneett DDiissaasssseemmbbllyy

18-GJ06D2-2A 13
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.
Note: Cross members are removed by rotating them toward the door
opening and then lifting up and out of the unit.
10. Continue preparation by following the proper carrying procedures shown in the next section.
OOppttiioonnaall CCaabbiinneett DDiissaasssseemmbbllyy

14 18-GJ06D2-2A
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 Member
Unit Top Plate
Cross M embers

18-GJ06D2-2A 15
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
TAM7A0A24H21SC 49.9 x 17.5 x 21.8 28.1 120
TAM7A0B30H21SC 55.7 x 21.3 x 21.8 33.9 133
TAM7A0C36H31SC 56.9 x 23.5 x 21.8 35.1 143
TAM7A0C42H31SC 56.9 x 23.5 x 21.8 35.1 158
TAM7A0C48H41SC 61.7 x 23.5 x 21.8 39.9 174
TAM7B0C60H51SB 61.7 x 23.5 x 21.8 39.9 178
* Blower compartment height is 21.8 inches.

16 18-GJ06D2-2A
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. They are shipped in the downflow orientation.
Airflow
Low Voltage
Connecti ons
Inside Unit
Control Pocket
Inside Unit
Refrigerant
Connecti ons
Downflow
Condensate
Drains
Downfl ow Confi gur ation
(as shi pped)
Airflow
Upflow Configuration
Refrigerant
Connections
Low Voltage
Connections
Inside Unit
Control
Pocket
Inside Unit
Upflow
Condensate
Drains

18-GJ06D2-2A 17
Airflow
Refrigerant
Connections Horizontal L eft
Condensate
Drains
Low Voltage
Connections
Inside Unit
Control P ocket
Inside Unit
Horizontal L eft Configuration
Horizontal Right Con figuration
Airflow
Control
Pocket
Inside Unit
Low Voltage
Connectio ns
Inside Un it Refrigerant
Connections
Horizontal Right
Condensate
Drains
FFoouurr--WWaayy CCoonnvveerrssiioonn

18 18-GJ06D2-2A
Ducted and Non-Ducted 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.
Suppl y Duct
Plenum
Accessor y with
Safety Guard
Non-Ducted
Return
Table 5. Ducted Return 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).
Suppl y Duct
Return Duct
Ducted Return

18-GJ06D2-2A 19
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.
• 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

20 18-GJ06D2-2A
Setting the Unit — Vertical Installation
Table 6. Secure Coil
1. Remove Coil Panel.
2. Remove screw from documentation packet.
3. While the air handler is in the upflow position, 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 easily replaced on the
unit.
Table 7. 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