Ingersoll-Rand TAM9A0A24V21DA 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
June 2017 1188--GGJJ8822DD11--11BB--EENN
Variable Speed Air Handlers
Convertible 2 — 5 Ton
TAM9A0A24V21DA
TAM9A0B30V31DA
TAM9A0C36V31DA
TAM9A0C42V41DA
TAM9A0C48V41DA
TAM9A0C60V51DA
NNoottee:: “Graphics in this document are for representation
only. Actual model may differ in appearance.”
NNoottee:: For use with BAYEA series heaters ONLY
Installer’s Guide

©2016 Ingersoll Rand 18-GJ82D1-1B-EN
SAFETY SECTION
AI HANDLE S
mmppoorrttaanntt — 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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ddeeaatthh
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ccaannnnoott bbee iinnaaddvveerrtteennttllyy eenneerrggiizzeedd
CCAAUUTTIIOONN
GGRROOUUNNDDIINNGG RREEQQUUIIRREEDD!!
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rreessuulltt iinn eeqquuiippmmeenntt ddaammaaggee oorr ppeerrssoonnaall iinnjjuurryy
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pprroodduucctt tthhaatt aarree ccaappaabbllee ooff ccoonndduuccttiinngg eelleeccttrriiccaall
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ssttrraappss,, cclliippss,, nnuuttss,, oorr wwaasshheerrss uusseedd ttoo ccoommpplleettee aa
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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
mmppoorrttaanntt:: 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.
mmppoorrttaanntt:: The TAM9 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-GJ82D1-1B-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 28
Electrical — Low Voltage 30
Control Panel Reinstallation 36
Electrical — High Voltage 37
TAM9 OUTLINE DRAWING 40
Display Assembly / Human
Interface 41
TAM9 — Technician Menu and
Configuration tree 42
Filters 47
System Charge Adjustments 47
System Start Up 48
TAM9 Sequence of Operation 49
Abbreviations 49
Fault Reporting 51
Checkout Procedures 52
Table of Contents

418-GJ82D1-1B-EN
Installer Guide Notes
AALLLL PPhhaasseess ooff tthhiiss iinnssttaallllaattiioonn mmuusstt ccoommppllyy wwiitthh
NNAATTIIOONNAALL,, SSTTAATTEE aanndd LLOOCCAALL CCOODDEESS!!
mmppoorrttaanntt:: This Document is customer property and is
to remain with t his unit. Please return to
service information upon completion of
work
mmppoorrttaanntt:: 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.
SSeeee TTAAMM99 SSeerrvviiccee FFaaccttss ddooccuummeenntt ffoorr iinnffoorrmmaattiioonn
oonn rreeaaddiinngg tthhee DDiissppllaayy,, AAiirr FFllooww TTaabblleess aanndd
TTrroouubblleesshhoooottiinngg FFlloowwcchhaarrttss
mmppoorrttaanntt:: The low voltage wire harness is shipped in
the supplied document pack.
NNoottee:: The manufacturer recommends installing ONLY
A.H.R. . 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 TAM9 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 needs to be configured in the
Configuration Menu.

18-GJ82D1-1B-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.
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 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-GJ82D1-1B-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. Disconnect the plug from the door to the unit.
4. Remove panel from channel.
5. 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-GJ82D1-1B-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.

818-GJ82D1-1B-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 (b)(c) Plenum Stand with integrated sound baffle B B
TASB235SB (b)(c) 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 (d) Sound Baffle Kit for 21.0” Cabinet B
BAYBAFKT235A (d) Sound Baffle Kit for 23.5” Cabinet C
TASSBK175 (b)(e) (f) Sound Baffle Kit for 17.5” Cabinet A
TASSBK210 (b)(e)(f) Sound Baffle Kit for 21.0” Cabinet B
TASSBK235 (b)(e)(f) 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
BAYWVKIT24VAC Hydronic Heater Relay Kit — (used in Communicating mode only) A 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
BAYAHEMIKIT001A EMI/EFI Air Handler Electronic noise kit for variable speed blower motor 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-GJ82D1-1B-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.
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.
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-GJ82D1-1B-EN
6. Slide Coil assembly out of unit using built-in coil support channels
and set aside
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-GJ82D1-1B-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-GJ82D1-1B-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-GJ82D1-1B-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.

14 18-GJ82D1-1B-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
TAM9A0A24V21DA 49.9 x 17.5 x 21.8 28.1 120
TAM9A0B30V31DA 55.7 x 21.3 x 21.8 33.9 133
TAM9A0C36V31DA 56.9 x 23.5 x 21.8 35.1 143
TAM9A0C42V41DA 56.9 x 23.5 x 21.8 35.1 158
TAM9A0C48V41DA 61.7 x 23.5 x 21.8 39.9 174
TAM9A0C60V51DA 61.7 x 23.5 x 21.8 39.9 178
* Blower compartment height is 21.8 inches.

18-GJ82D1-1B-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.

16 18-GJ82D1-1B-EN
FFoouurr--WWaayy CCoonnvveerrssiioonn

18-GJ82D1-1B-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.
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).

18 18-GJ82D1-1B-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.
“SU TABLE FOR MOB LE HOME USE.”
NNoottee:: TThhiiss uunniitt iiss cceerrttiiffiieedd ttoo UULL 11999955.. TThhee iinntteerriioorr
ccaabbiinneett wwaallll mmeeeettss tthhee ffoolllloowwiinngg::
— 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-GJ82D1-1B-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-GJ82D1-1B-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
SSeettttiinngg tthhee UUnniitt —— VVeerrttiiccaall IInnssttaallllaattiioonn