Installer's Guide Convertible Air Handlers
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18-GJ06D2-2
Installer’s Guide
Convertible Air Handlers
2 – 5 Ton
TAM7A0A24H21SC TAM7A0C48H41SC
Scan to see the
TAM7A0B30H21SC TAM7B0C60H51SB
TAM7 Trouble- TAM7A0C36H31SC
shooting Video
Library. TAM7A0C42H31SC
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.
See the TAM7 Service Facts document for
information on reading the Control Board LEDs, Air
Flow Tables and Troubleshooting Flowcharts.
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 performance, 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 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:
BAYEVAC05BK1AA BAYEVBC15BK1AA
BAYEVAC05LG1AA BAYEVBC20BK1AA
BAYEVAC08BK1AA BAYEVCC25BK1AA
BAYEVAC08LG1AA BAYEVAC10LG3AA
BAYEVAC10BK1AA BAYEVBC15LG3AA
BAYEVAC10LG1AA
Note: Duct heaters cannot be applied
with this air handler.Table of Contents
Section 1. Safety Information........................................................................... 2
Section 2. Unit Design.......................................................................................... 3
Section 3. Unit Preparation............................................................................... 5
Section 4. Optional Cabinet Disassembly................................................. 6
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 - Low Voltage............................................................ 27
Section 14. Electrical - High Voltage........................................................... 37
Section 15. Unit Outline Drawing................................................................. 39
Section 16. Filters................................................................................................. 40
Section 17. Start Up............................................................................................. 40
Section 18. Sequence of Operation............................................................ 42
Section 19. Checkout Procedures............................................................... 44
Section 1. Safety Information
▲! WARNING ▲! CAUTION
SAFETY HAZARD! This information is intended for use CORROSION HAZARD! To prevent shortening its service
by individuals possessing adequate backgrounds of electrical and life, the air handler should not be used during the finishing phases
mechanical experience. Any attempt to repair a central air condition- of construction. The low return air temperatures can lead to the
ing product may result in personal injury and/or property damage. formation of condensate. Condensate in the presence of chlorides
The manufacturer or seller cannot be responsible for the interpreta- and fluorides from paint, varnish, stains, adhesives, cleaning com-
tion of this information, nor can it assume any liability in connection pounds, and cement creates a corrosive condition which may cause
with its use. rapid deterioration of the cabinet and internal components.
▲! WARNING ▲! CAUTION
LIVE ELECTRICAL COMPONENTS! During instal- SAFETY HAZARD! Sharp Edge Hazard. Be careful of sharp
lation, testing, servicing, and troubleshooting of this product, it may edges on equipment or any cuts made on sheet metal while install-
be necessary to work with live electrical components. Failure to fol- ing or servicing. Personal injury may result.
low all electrical safety precautions when exposed to live electrical
components could result in death or serious injury.
Important: Panel damage can occur with prolonged
exposure to POE lubricants. Air handler front panels
▲! CAUTION that come in contact with POE oil must be washed
immediately with soapy water.
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.
Note: Representative illustrations only included in this
document. Most illustrations display the upflow configu-
ration.
2Section 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- Screws for flange kit
attachment are allowed
ture the unit cabinet in any location other than the along the interior of
ones illustrated. the cabinet (see arrows)
(Typical all sides)
Screws are allowed up to 3- 3/4”
Important: Under no conditions should metal strap- from the top of the cabinet
(heater compartment).
ping be attached to the unit to be used as support (Typical both sides)
mechanisms for carrying or suspension purposes.
No penetrations
allowed.
(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 can be drilled
into bottom of unit.
Screws allowed only
(1/2” max. screw
in the first 3/4” of front
length)
bottom of unit (in
(Typical all sides)
cross member)
2.2 Panel Removal
The unit contains four (4) access panels: Blower/Fil-
ter, 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.
3The 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 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.
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.
4Section 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,
depress the Schrader valve to verify coil is pressur-
ized.
3.2 Unit Accessories Table 3.2
Accessory Number Description Fits Cabinet Size
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
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
MITISRKIT1620 Side Return Kit with Filter A to 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
5Section 4. Optional Cabinet Disassembly
4.1 Disassemble cabinet for installation in tight areas or as needed.
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.
STEP 1 - Remove all four front panels. See Section
2.2.
Blower Electrical
Connections
6STEP 2 - Disconnect the two wiring connections
routed to the blower assembly.
STEP 3 - Slide Blower assembly out of unit using
built-in blower support channels and set aside.
Wiring
Connections
Blower Support
Channel
STEP 4 - Remove airflow diverter from the bottom of
coil drain pan by gripping the plastic diverter, using Diverter
your thumbs to spread the top of the diverter slightly
outwards, and then pulling down and out through the
blower opening as illustrated.
7STEP 5 - Disconnect wires to the EEV motor and
sensors. Cut the wire ties on those wire harnesses.
Note: If cut, wire ties that held the sensor must
be replaced after the coil is placed back into the
cabinet.
STEP 6 - Slide Coil assembly out of unit using built-
in coil support channels and set aside.
Coil Support
Channel
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.
8STEP 8 - Lift the Coil section up and away from the
Blower section. Set aside.
2
1
9STEP 9 - For extremely tight spaces where the
cabinet needs to be rotated through a small opening, 2
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 1
of the unit.
STEP 10 - Continue preparation by following the
proper carrying procedures shown in Section 5.
10Section 5. Place Unit at Location
5.1 Carry Unit
STEP 1 - Carry the unit to the installation location.
STEP 2 - Reassemble 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 strap-
ping be attached to the unit to be used as support
mechanisms for carrying or suspension purposes.
Cross Member
Unit Top Plate
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
11Section 6. Unit Location Considerations
6.1 Unit Dimensions and Weight
Table 7.1
Coil and Heater
Unit
Model H xW x D Compartment
Net Weight
Number in. Height *
lbs.
in.
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
W
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.
H
D
126.2 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.
Note: The air handlers are shipped from the factory suitable for four-way application.
Refrigerant
Connections
Airflow
Low Voltage
Connections
inside unit
Low Voltage
Connections
inside unit
Control Control
Pocket Pocket
Inside unit Inside unit
Upflow
Refrigerant Condensate
Connections Drains
Airflow
Downflow
Condensate
Drains
Downflow Configuration Upflow Configuration
13Airflow
Horizontal Left Control
Refrigerant Low Voltage
Condensate Pocket
Connections Connections
Drains Inside unit
inside unit
Horizontal Left Configuration
Control Low Voltage
Pocket Connections Refrigerant
Inside unit inside unit
Connections
Airflow
Horizontal Right
Condensate Drains
Horizontal Right Configuration
146.3 Non Ducted Applications
! CAUTION
▲ Supply Duct
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.
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- Plenum
es, including an electric hot water heater, but Accessory
in no case shall a fossil fuel device be installed with safety guard
and/or operated in the same closet, alcove, or
utility room.
•• Review local codes to determine limitations if
Non-Ducted
the unit is installed without a return air duct. Return
6.4 Ducted Applications
Supply Duct
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).
Return Duct
Ducted Return
156.5 Additional Unit Preparation Considerations
For proper installation the following items must be con- •• These units are not approved for outdoor installation.
sidered prior to moving the unit to its installation site: •• These units must be installed in the proper air flow
•• Pursuant to Florida Building Code 13-610.2.A.2.1, this direction.
unit meets the criteria for a factory sealed air handler.
•• Any third-party heater accessories or hydronic coils
•• If a side return is needed for your application, the side must be downstream of the unit.
return MUST be prepared prior to moving the air han-
•• Note: No atomizing style humidifier is allowed in the
dler to its installation location. See the Side Return Kit
return plenum with the use of this unit.
# BAYSRKIT100A Installer Guide for detailed instruc-
tions. •• Excessive bypass air may cause water blow-off,
which will adversely affect system operation and air
• When the air handler is located adjacent to the living
cleaner performance. To verify bypass airflow, fol-
area, the system should be carefully designed with re-
low the Bypass Humidifier Pre-Installation Checkout
turns which minimize noise transmission through the
and Set-Up Procedures available through your local
return air grill. Although the air handler is designed
distributor. Ask for publication number 18-CH37D1-*
with large blowers operating at moderate speeds, any
Steam and Flow-through Fan Power Duct-mounted
blower moving a high volume of air will produce audi-
Humidifiers. Follow the humidifier installation instruc-
ble noise which could be objectionable when the unit
tions. These should only be installed on the supply
is located very close to a living area. It is often advis-
air side of the system.
able to route the return ducts under the floor through
the attic. Such design permits the installation of air •• Note: The air handlers have been evaluated in accor-
return remote from the living area (i.e central hall). dance with the Code of Federal Regulations, Chapter
XX, Part 3280 or the equivalent. “SUITABLE FOR
•• Study the unit’s outline drawing and dimensions prior MOBILE HOME USE.”
to selecting the installation site. Note in advance •• Note: This unit is certified to UL 1995.
which electrical conduit entry points and condensate The interior cabinet wall meets the following:
drain holes are to be used, so that proper clearance - UL94-5VA Flame Class Listed
allowances can be made for installation and future - UL723 Steiner Tunnel Listed for 25/50 Flame/
maintenance. Smoke
•• Installation of the air handler must be made prior to, - UL746C Listed for Exposure to Ultraviolet Light,
or at the same time as, the installation of the outdoor Water Exposure and Immersion
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.
16Section 7. Setting the Unit - Vertical Installation
7.1 Secure Coil
STEP 1 - Remove Coil Panel.
STEP 2 - Remove screw from documentation packet.
STEP 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.
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. 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”x20” filter
Contact your distributor for more information.
Airflow Airflow
Ai
rfl
ow
Typical TASB Installation
17Plenum Installation
1. 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
7.4 Downflow Installation
•• Downflow installation must comply with national,
state, and local codes.
•• The air handlers are rated for zero clearance from
combustible materials.
STEP 1 - Prepare the location site as appropriate for
your application and per national, state, and local code
requirements.
STEP 2 - Set the unit in position.
Representative Illustration
Typical Downflow Installation
18Section 8. Setting the Unit - Horizontal Installations
8.1 Secure Coil
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.
8.2 Considerations
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 Field Supplied
illustrated in this Installer Guide or in an approved ac- Isolators
cessory’s Installer Guide.
Important: Make certain that the unit has been in-
stalled in a level position to ensure proper draining.
Important: Under no conditions should metal strap-
ping be attached to the unit to be used as support
mechanisms for carrying or suspension purposes.
STEP 1 - Support the unit from the bottom (near both
ends). The service access must remain unobstructed.
Important: The unit can only be supported from the
bottom unless using kit BAYHHKIT001A. Do not drill
or screw supports into any area of the cabinet.
Note: Do not allow the unit to be used as strain relief. Bottom Support
Auxiliary Drain Near Both Ends
Pan
•• Approved bottom support methods are rails, u-
channels (Unistrut®), or other load bearing materi-
als. Note: BAYHHKIT001A Hanging Bracket Kit may be
ordered separately.
•• The unit must be isolated carefully to prevent
Important: The BAYHHKIT001A may not be used
sound transmission. Field supplied vibration isola-
if the cabinet has been altered per Installer Guide
tors are recommended.
18-HJ58D1-1.
STEP 2 - Install an auxiliary drain pan under the
horizontal air handler to prevent possible damage to
ceilings.
•• Isolate the auxiliary drain pan from the unit and
from the structure.
•• Connect the auxiliary drain pan to a separate drain
line and terminate according to local codes.
19Section 9. Connecting the Duct work
9.1 Duct Connection Considerations
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 in this Installer Guide or in an ap-
proved accessory’s Installer Guide.
Important: Under no conditions should metal strap-
ping be attached to the unit to be used as support
mechanisms for carrying or suspension purposes.
Important: On units with sheet metal returns: Return
air plenum must be flanged. Sheet metal drill point
screws must be 1/2” in length or shorter.
•• The supply and return air ducts must be connected
to the unit with non flammable duct connectors.
•• See the Outline drawing for sizes of the duct con-
nections.
Screws allowed in
•• After the ducts are secured, seal around the sup-
first 3/4” of bottom
ply and return ducts to prevent air leakage.
3/4” cross member.
•• Insulate all duct work that will be outside of condi-
tioned spaces.
•• Convertible Duct Flange Kits are available to con-
nect the supply plenum or for mounting on the
discharge opening to provide a “flush fit” for 1‑1/2”
duct board applications.
•• If front or rear return is required, the air handler
must be elevated - placed on a pedestal or plenum
and duct must be connected to this pedestal or
plenum.
•• If side return is required, the Side Return Kit #
BAYSRKIT100A accessory must be used. A re-
mote filter will be required.
•• To ensure maximum efficiency and system perfor-
mance, the existing supply and return duct system
static pressures must not exceed the total available
static pressure of the air handler. Reference ACCA
Manual D, Manual S and Manual RS along with
the air handler Product Data and Service Facts for
additional information.
Note: Side return is not approved without Side
Return Kit # BAYSRKIT100. More than one Side
Return Kit may be necessary depending on the
application. Refer to the Installation Guide in
BAYSRKIT100 for approved duct connections,
sizing, number, transitions, and accessory
application.
Note: Duct work must be supported as appropriate.
See National and local codes for guidelines. Do not
depend on the unit to support duct work.
20Section 10. Refrigerant Line
10.1 Refrigerant Line Connection Sizes
Table 10.1
Refrigerant Line Connection Sizes
Vapor Line Liquid Line
Model
Connection Connection
TAM7A0A24H21SC 3/4 3/8
TAM7A0B30H21SC 3/4 3/8
TAM7A0C36H31SC 7/8 3/8
TAM7A0C42H31SC 7/8 3/8
TAM7A0C48H41SC 7/8 3/8
TAM7B0C60H51SB 7/8 3/8
Notes:
1. This table indicates the tubing connection diameters at the indoor coil. A field supplied reducing
coupling may be required.
2. All AHRI listed systems are tested with 25 feet of refrigeration tubing; the rated tubing diameters are
located in the electronic performance data system.
3. If the refrigeration lines exceed 60 feet in linear length and / or if alternate size refrigeration tubing
is present at the job, please consult SS-APG006-EN or 32-3312-**(latest version)
10.2 Refrigerant System Layout
Check Valve Liquid Line
Vapor Line
Gas Temperature Strainer
Sensor (GT)
- located on copper
section of manifold
(black wires)
Evaporator Temperature
Sensor (ET)
- located on 3/8" Aluminum
distributor tube
(orange wires)
EEV Stepper
Motor
Note: Some future
models may not
have external check
valve.
21Section 11. Refrigerant Line Brazing
11.1 Braze The Refrigerant Lines
STEP 1 - Remove Heater, Coil, and Line Set panels.
1
Heater
(See Section 2.2 Panel Removal)
Panel
Line Set
Panel 3
Coil
Panel 2
Important: Do NOT unseal coil refrigerant connec-
tion stubs until ready to make connections.
Important: Heat Sensitive Sensors.
The Gas Temperature Sensor must be removed or
a wet rag must be wrapped around the suction line
between the Sensor and the braze joint to protect it
from failure due to overheating.
STEP 2 - Remove the plastic cap and Schrader valve
core from the gas line.
STEP 3 - Wrap the Gas Temperature Sensor (GT)
with a wet rag.
Important: Care must be taken during solder cap
removal and brazing to avoid damage to unit compo-
nents and wiring.
STEP 4 - Apply low heat to the solder cap to slowly STEP 5 - Remove the sealing plug from the indoor coil
heat the solder. (Do not apply direct heat to the va- liquid connection.
por line) Use adjustable pliers to grab the flare fitting
and remove the solder cap.
STEP 6 - Connect, but do not braze, field line set to
indoor coil.
Allow a minimum of three (3) inches of refrigerant
line set before using an elbow coupling.
3” MIN
Important: Service access to the auxiliary heater
must remain unobstructed.
22Important: Heat Sensitive Sensors.
The Gas Temperature Sensor must be removed or
a wet rag must be wrapped around the suction line
between the Sensor and the braze joint to protect it Scan to see a
video on Brazing
from failure due to overheating. the TAM7
Refrigerant lines.
STEP 7 - Braze refrigerant line connections.
Wet Rag on
Note: The suction line must be insulated prior to Gas Temperature
brazing the line set to the air handler stubs. Sensor (GT)
1. Pull back the insulation before brazing the suc-
tion line.
2. Wrap the Gas Temperature Sensor (GT) with a
wet rag.
3. Braze the refrigerant line connections.
Important: Care must be taken during brazing to
avoid damage to unit components and wiring.
STEP 8 - Pressurize the refrigerant lines and evapo-
rator coil to 150 PSIG using dry nitrogen. 150 PSIG
STEP 9 - Check for leaks by using a soapy solution
or bubbles at each brazed location.
23Important: Do not open the service valves until the
refrigerant lines and indoor coil leak check and evacu-
ation are complete.
0350
STEP 10 - Evacuate until the micron gauge reads no Microns
higher than 350 microns, then close off the valve to the
vacuum pump. ON OFF
STEP 11 - Observe the micron gauge. Evacuation is
complete if the micron gauge does not rise above 500
microns in one (1) minute.
Once evacuation is complete blank off the vacuum
pump and micron gauge, and close the valves on the
1 MIN.
manifold gauge set.
Note: Charge system using Outdoor unit’s Installer
Guide or Service Facts.
STEP 12 - Replace the Line Set panel.
1. Allow time for tubing to cool.
2. Install grommets to line set piping in orientation
shown.
Note: A slight amount of dish soap can be used to
aid in the installation of the grommets. Remove any
excess from the tubing and grommet after the grommet
See enlarged
is installed. illustration for
orientation
3. Slide the bottom of the Line Set panel down over
the refrigerant lines and grommets. The grommets
will seal the line openings.
4. Tighten screws on the Line Set panel.
24Section 12. Condensate Drain Piping
12.1 Condensate Drain Piping Considerations
•• Condensate drain plumbing must comply with na- •• Do not connect the drain line to a closed drain
tional, state, and local codes. system.
•• Route condensate drain lines away from air handler •• Do not use a torch or flame near the plastic drain
so they do not interfere with access panels. pan coupling.
•• Slope the drain lines downward a minimum of 1/4” •• A P-trap is not required for proper drainage due to
per foot, support per local codes. the positive pressure of the air handler; however,
•• Do not use reducing fittings in the condensate drain it is recommended to prevent efficiency loss of
lines. conditioned air.
12.2 Connect Condensate Drain Piping
Note: Upflow and horizontal orientations require the Downflow
Coil panel to be removed in order to make the drain Condensate
connections. Note: Make certain that the unit has been Drains
installed in a level position to allow for proper draining. S P
Condensate Drains
Condensate Drains
S P
P S
Horizontal Right
Horizontal Left
STEP 1 - Select the drain connections that are ori-
ented for your application.
STEP 2 - Prepare the condensate drain connections.
•• From the factory, the unit comes with plugs in both
upflow condensate drains and an additional plug in
the documentation packet.
•• For upflow applications, remove upflow condensate
plug(s) and connect condensate piping. S
•• For all other applications, do not remove upflow con- P
densate plugs. Remove the cover from the needed Upflow
condensate drain connections and connect conden- Condensate
sate piping. Air seal Drains
over secondary
•• If the secondary condensate opening is not used, drain
plug the condensate opening with the fitting supplied
in the documentation pack. Use scissors to cut the Note: A small amount of sealant must be applied
air seal in half and re-install over the unused open- around the drain line(s) passing through the panel
ing. to prevent air leakage and possible water drips.
•• Dry fit and test clearance for coil panel removal
before applying PVC/CPVC cement
•• Use Teflon tape on the air handler drain line
connections. Do not use pipe joint compound or Teflon Tape
PVC/CPVC cement on drain nipple.
•• Hand tighten the drain pipe.
STEP 3 - For Upflow installations, connect 3/4” PVC
pipe to the threaded drain nipple with PVC/CPVC ce-
Drain Nipple
ment. 3” minimum clearance to the condensate piping
is needed for coil panel removal. Thread the assembly
into the primary drain connection (repeat for the sec-
ondary drain connection if used).
Important: For Horizontal and Downflow installations,
the following order must be observed:
1) Remove panel and insert the 3/4” nipples. 3/4” PVC pipe
2) Reinstall the panel.
3) Connect the condensate lines to the nipples.
Note: A small amount of sealant must be applied PVC
CEMENT
around the drain line(s) passing through the panel
PVC/CPVC Cement
to prevent air leakage and possible water drips.
25STEP 4 - Install a clean-out tee in the primary
drain line for future maintenance. It is recom-
mended that you install a cap on the top of the Cap
tee.
3” min.
3” minimum
clearance is
recommended
from cabinet to Tee
inside edge of
tubing
STEP 5 - Insulate the primary drain line to
prevent sweating where dew point temperatures Insulation
may be met. (Optional depending on climate
and application needs.)
Provide a means of drainage to prevent winter
freeze-up of condensate line. (Optional depend-
ing on climate and application needs.)
STEP 6 - Support the condensate piping outside Condensate
the unit per local codes for proper drainage and Piping
Supports
to prevent sagging.
Allow 1/4” of downward slope for each foot of
pipe.
26Section 13. Electrical - Low Voltage
13.1 Low Voltage Maximum Wire Length
Table 11.1 defines the maximum total length of low Table 11.1
voltage wiring from the outdoor unit, to the indoor
unit, and to the thermostat. 24 VOLTS
WIRE SIZE MAX. WIRE LENGTH
18 AWG 150 Ft.
16 AWG 225 Ft.
14 AWG 300 Ft.
13.2 Low Voltage Hook-up Instructions
STEP 1 - Route control wiring to unit. Remove the
external sheathing of the wiring approximately 5”.
5”
Note: Optional Low Voltage Conduit
Entry Kit number BAYLVKIT100A is
available.
STEP 2 - Remove Coil panel by turning the Phillips
head door fasteners, rotating the door away from the
cabinet, and removing.
27STEP 3 - Remove the control board from the control
pocket by sliding the control pocket mounting plate
out until the first stop is reached.
Control
Pocket
Inside
unit
Control
Board
For Horizontal Right installations Only
Remove the control board completely from the con-
trol pocket. Rotate the control board 180 degrees.
Place the control board 2-3 inches back into the
control pocket. Attach wiring per appropriate hook-
up diagram or perform service.
Important: After wires have been connected or ser-
vice performed, the control board MUST be rotated
back to the original orientation before inserting into
control pocket in the cabinet. 1
2
28STEP 4 - Make connections per hookup diagrams. Air Conditioner
Neatly bundle all low voltage
wires behind the service
Scan to see a valve cover as shown.
video on Field
Wiring the TAM7.
Single Stage Cooling
Air Handler
Comfort Control
W3 *
W2 Blue
W White W1
G BK Yellow
Y1 Green G
O Y2
R Yellow YI (In)
B O
Y2 Red R
Blue B B - Blue
Field wiring YO (Out) Y1 - Yellow
•• * For multiple stages of electric heat, jumper W1, W2, and W3 together if comfort control has only one stage of heat.
•• YI and YO connections must be made as shown for proper operation, freeze protection, and internally mounted condensate overflow
circuits to work properly.
•• Internally mounted condensate switch is optional and must be ordered separately.
•• If 3rd party condensate overflow switches are installed, they should be wired between Y of the thermostat and YI of the Airflow control.
Single Stage HP Heat Pump
Neatly bundle all low voltage
wires behind the service valve
cover as shown.
Black
Air Handler (X2)
Comfort Control
Orange
W3 * Blue Yellow
X2 W2
W White W1 W1 - White Red
G BK
Y1 Green G
O Y2
R Yellow YI (In)
B Orange O O - Orange
Red R R - Red
Blue B B - Blue
Field wiring YO (Out) Y1 - Yellow
•• * For multiple stages of electric heat, jumper W1, W2, and W3 together if comfort control has only one stage of heat.
•• YI and YO connections must be made as shown for proper operation, freeze protection and internally mounted condensate overflow circuits
to work properly.
•• Internally mounted condensate switch is optional and must be ordered separately.
•• If 3rd party condensate overflow switches are installed, they should be wired between Y of the thermostat and YI of the Airflow control.
29Two Stage Cooling Air Conditioner
Neatly bundle all low voltage
wires behind the service
valve cover as shown.
Air Handler
Comfort Control Yellow/Black
W3 * Yellow/Red
W2
W White W1
G Green BK Blue
Y1 Yellow G
O Y2 Y2 - Brown
R Red YI (In)
B Blue O
Y2 Brown R
B B - Blue
Field wiring YO (Out) Y1 - Yellow
•• * For multiple stages of electric heat, jumper W1, W2, and W3 together if comfort control has only one stage of heat.
•• YI and YO connections must be made as shown for proper operation, freeze protection and internally mounted condensate overflow circuits
to work properly.
•• Internally mounted condensate switch is optional and must be ordered separately.
•• If 3rd party condensate overflow switches are installed, they should be wired between Y of the thermostat and YI of the Airflow control.
Two Stage HP Heat Pump
Neatly bundle all low voltage
wires behind the service valve
cover as shown.
Black
Air Handler (X2)
Yellow
Comfort Control Yellow/Red
W3 *
X2 W2 Red Blue
Orange
W White W1 W1 - White
G Green BK
Y1 Yellow G
O Orange Y2 Y2 - Brown
R Red YI (In)
B Blue O O - Orange
Y2 Brown R R - Red
B B - Blue
Field wiring YO (Out) Y1 - Yellow
•• * For multiple stages of electric heat, jumper W1, W2, and W3 together if comfort control has only one stage of heat.
•• YI and YO connections must be made as shown for proper operation, freeze protection and internally mounted condensate overflow circuits
to work properly.
•• Internally mounted condensate switch is optional and must be ordered separately.
•• If 3rd party condensate overflow switches are installed, they should be wired between Y of the thermostat and YI of the Airflow control.
30STEP 5 - Secure the sheathed wiring to the
control pocket mounting plate using the factory
supplied wire ties attached to the tabs to as
shown. S1 Dip Switch
S2 Dip Switch
Airflow Control (AFC)
TRANE U.S. INC. HUM OUTDOOR
J4
PART NO. LABEL Pb on
Wire Ties J1
1 2 3 4 5
} Capacity (Tons)
LR
V S VD MC
D
HP AC (System)
T1
C7
T2 C3 C37
S
R5 D1 R19 1 2 (Stages)
J8
R12
D
G
1 2 (Compressor)
P
R7
C
C2
G
P
D2 R4 S1
C6
R2 R8
R3
INDOOR
BAR CODE R21 C1
R NET 1 on
1 2 3 4 5
D7
}
K1
D4
R42 R34 R NET 2 CFM/Ton
R6
D6 D3
Cool Off Delay
R1 }
Q1 U1
D5 R25 R18
C17 C16 D11 C5 C4 D8 R39 R33
R24 R17 R40 Torque CFM
D10 R10 R43
C9
R46 R13
C23
1
R9 U2
S2
R14
R26 R27 R15 D9
C22
R11
C12
C15
C19
R28 R16 R41 16 1 R57 R58
D12 C25 C10
D30 C24 17 64
C45 C44 D31 +12V
L1
C11
C14
C18
C21
J9
C8
D13 C36 R22
J3
C31 R23
J13 J7
Y1
R48
C13
C34
C42
R38 R32 R36 R20
PTC1
R85 R82 R84
+12V
O
C DA .3V
D15 C26 D18 32 49 R77
C27 C29 C30 D19 C35 Q3
S 3
D16 33 48 R65 R64 Q5 R44
RX
C20
R79 Q2
B
L
C43 R83 TX
R29
S
R31
R35
X1 R78 R76
R47 Q4
GND
D
Yo
R45 R49
N
R52 R54 R81
G
R51
R50 R55
R86 D14
D20 R69 R72 R71 R37
C33 C32 D21
R75
R30 MOTOR
R
Q6
R53 D17
R61
R91 R98 C28
R63 R89 Q7 R59
D26 C41 D27 D29 C49
R56 R62 R74 C59 R105
C48 R97 R108
Yo Jumper BK Jumper
C46
D22
C55
R109 C60
STATUS W2 R103
W1 TZ2
R106 D36 R95
D24 C54
R60
C53 U4
D35 C56
R102 R99 R96
UNIT R66 R68
D33 C52 C47
Q8 C40 D34
R101 C57
D25
R107
FAULT U3 L2
R110 5V
R87
K2 R94 C58 C50
R88
R93
R70 R100 R104 MOV1
C39 R67 C38 C51
D32 D23
D28 L3
R80
R73
J6 U5
S3
+13.8V
TEST
+V GND
A/Y B/Z
C3 R9 D3 L2
R4 J2
P/N LABEL
MH4 MOV1
BAR CODE R10 MH3
L3 R43 C1
R11
D14 C4 R40 J1
STATUS D15 R6 R34 Q5
Distribution Board
R87 R5 C37 R44
D16 D4 Q1 R3
UNIT D17 R30 R86
R31 D1
C35 L1
D18 R16 R35 Q6
FAULT R15
R88
D19 +12V
R 45
R14
R 37
D7 Q2 R59
3 2 1 D11 D5
R21 U3 R83
J7 R39 R36 Q7
R47 R20 C16
R32 C40 Q3 R19 D20
R 410
R8
R 22
R33 R42
R17
Q8
D8 OVR J6
R25 U4 R38 R27 FLOW
X1
R29
EVAP
R 46
C15 Q4 R26
R60
C27 C26 D12 TEMP
C13
C 12
J4 R57
+5V R48 C36
R74 R70
R56 C41 L4 C14 C30
OPEN R55 L5 D13
R75 C17 R72
TEST C6
R 90
R54
J7 Jumper
R28
C 31
R 79
D25
CLOSE R53 R81
C18
R2 R7
GAS C33
D21
TEMP R77
R 82
R52 R76 C2
R49 R12 R73
D26
R 80
C 21
R 91
R51 C34 R84 R78 J3
C29 C32
C28 D22 C5
D24
R71 U1 R85 R22
R 41
C38
D23
MH1
Q9
C42 GND
J5
C11
TRANE U.S. INC. MH2
D
D
PGC
S
LR
VD
PG
VS
C
Electronic Expansion Valve Control (EVC)
STEP 6 - Set Jumper and Dip Switches
Refrigerant Jumper J7
•• Set the system refrigerant to either R-410A or R-22 P/N LABEL
using the Refrigerant Jumper located on the Expan-
MH4
BAR CODE R10
R11
D14
sion Valve Control board (EVC) in the Control Pocket.
STATUS D15
R87
D16
UNIT D17 R30 R
R31
C35
D18
•• Factory default is R-410A.
FAULT R88
D19
R 45
R 37
3 2 1 D11
R21 U3
J7 R39 R47
•• Note: The power must be shut off and then re-applied R32 C
R 410
R8
R 22
R33 R42
R17
in order for the EVC to recognize the change. R25 U4
X1
R29
R 46
C15
R60
C27 C26
C13
C 12
J4 R57
R74 R70
R56 C41 L4 C14
OPEN R55 R75 L5
C17
TEST C
R 90
R54
C 31
R 79
D25
R53 C18
CLOSE R81
D21
R 82
R52 R76
D26
R 80
C 21
R 91
R51 C34 R84
J7 Jumper C28 D22 C5
D24
R71
R 41
D23
MH1
Q9
J5
C11
TRA
D
D
PGC
S
LR
VD
PG
VS
C
Scan to see a
video on setting
the TAM7 DIP Electronic Expansion Valve Control (EVC)
Switches.
31Dip Switch S1
•• Set the S1-1 and S1-2 dip switches for the OD
multiplier (tonnage) per the chart. S1
OUTDOOR
INDOOR MODEL S1-1 S1-2 OD MULTIPLIER on
1 2 3 4 5
OFF OFF 2 } Capacity (Tons)
OFF ON 1.5 HP AC (System)
TAM7A0A24H21SC 1 2 (Stages)
ON OFF 2.5
R4 1 2 (Compressor)
ON ON 3
S1
INDOOR
1
R NET 1
R NET 2
on
OFF OFF 2
R6
1 2 3 4 5
}
R1
CFM/Ton
OFF ON 1.5 U1
TAM7A0B30H21SC Cool Off Delay
}
ON OFF 2.5
R13
ON ON 3 Torque CFM
R14
D9
C22
C12
C15
C19
C10 S2
+12V
L1
C18
C21
OFF OFF 3 R22
OFF ON 2
TAM7A0C36H31SC Airflow Control (AFC)
ON OFF 2.5
ON ON 3.5
OFF OFF 3.5
•• Set the S1-4 dip switch for the number of stages
OFF ON 2.5 on the outdoor unit.
TAM7A0C42H31SC
ON OFF 3
ON ON 4
OD STAGES S1‐4
1 OFF
OFF OFF 4
2 ON
OFF ON 3 16 SEER = 2 Stages
TAM7A0C48H41SC
ON OFF 3.5 19 SEER = 2 Stages
20 SEER = 2 Stages
ON ON 4.5**
•• Note: This dip switch should be changed while the
power is off or no demand is present. The power
OFF OFF 4.5** must be shut off and then re-applied in order for the
OFF ON 3.5 AFC to recognize the change.
TAM7B0C60H51SB
ON OFF 4
ON ON 5 •• Set the S1-5 dip switch for the number of
compressors.
NOTE: The OD multiplier in conjunction with the CFM/TON
can be used to adjust total airflow for your application.
# COMPRESSORS S1‐5
Example: 4.5T x 370 CFM/TON = 1665 CFM 1 OFF
2 ON
** Not an actual OD size
16 SEER = 1 Compressor
19 SEER = 2 Compressors
•• Set the S1-3 dip switch for AC or HP. 20 SEER = 2 Compressors
OD TYPE S1‐3
HP OFF
AC ON
32OUTDOOR
Dip Switch S2 on
•• Set the S2-1 and S2-2 dip switches for the
1 2 3 4 5
} Capacity (Tons)
Cooling and Heating CFM/Ton.
HP AC (System)
1 2 (Stages)
R4 1 2 (Compressor)
S1
INDOOR
1
R NET 1
R NET 2
on
R6
1 2 3 4 5
}
R1
CFM/Ton
U1
Cool Off Delay
}
R13
Torque CFM
R14
D9
C22
C12
C15
C19
C10 S2
+12V
L1
C18
C21
R22
S2
Airflow Control (AFC)
INDOOR MODEL S2-1 S2-2 COOLING HEATING
CFM/TON CFM/TON
OFF OFF 400 430
OFF ON 360 390
TAM7A0A24H21SC
ON OFF 380 410
ON ON 420 450
OFF OFF 400 430
OFF ON 360 390
TAM7A0B30H21SC
ON OFF 380 410
ON ON 420 450
OFF OFF 370 420
OFF ON 350 400
TAM7A0C36H31SC
ON OFF 390 440
ON ON 410 450
OFF OFF 370 400
OFF ON 350 360
TAM7A0C42H31SC
ON OFF 350 380
ON ON 390 420
OFF OFF 350 400
OFF ON 330 380
TAM7A0C48H41SC
ON OFF 370 420
ON ON 390 440
OFF OFF 370 400
OFF ON 380 410
TAM7B0C60H51SB
ON OFF 390 420
ON ON 400 430
33•• Set the S2-3 and S2-4 dip switches for the OUTDOOR
Blower Off Delay. on
1 2 3 4 5
} Capacity (Tons)
HP AC (System)
BLOWER OFF DELAY S2‐3 S2‐4 1 2 (Stages)
R4 1 2 (Compressor)
1.5m @ 100% OFF OFF
S1
INDOOR
1
NO DELAY OFF ON R NET 1
R NET 2
on
3m @ 50% ON OFF
R6
1 2 3 4 5
}
CFM/Ton
ENHANCED ON ON
R1
U1
Cool Off Delay
}
R13
Torque CFM
R14
D9
Indoor Blower Timing
C22
C12
C15
C19
C10 S2
This ENHANCED MODE selection provides a +12V
L1
C18
C21
R22
ramping up and ramping down of the blower
speed to provide improved comfort, quietness, Airflow Control (AFC)
and potential energy savings. The graph on the
right shows the ramping process.
100% if necessary
Enhanced Mode works in cooling, HP, heating,
Torque, and constant CFM modes. 80%
FAN OPERATION (CFM)
Dehumidify
50% 50%
•• Set the S2-5 dip switch for the airflow mode.
Fast Coil Cooling
Efficiency
OFF OFF
AIRFLOW MODE S2‐5
*TORQUE OFF as required
1 7.5 3
CONSTANT CFM ON minute minutes minutes
COMPRESSOR OPERATION ON OFF
* All zoning applications MUST be set to Constant CFM mode.
* Torque mode is optional and is recommended for high static
applications. High static conditions dramatically increase energy
consumption with variable speed motors. Evaluate the blower
performance table in relationship to the duct system to determine
the benefit of each installation.
* For the 2 ton air handler, torque mode will reduce airflow when
static is above approximately 0.3" water column.
* For the 2-1/2, 3, and 3-1/2 ton air handlers, torque mode will
reduce airflow when static is above approximately 0.35” water
column.
* For the 4 and 5 ton air handlers, torque mode will reduce airflow
when static is above approximately 0.4” water column.
When selected, Torque Mode is used for cooling operation only.
All heating modes default to constant CFM.
34Indoor Blower Options BK Jumper
TRANE U.S. INC. HUM J4
PART NO. LABEL
•• Humidity Control for Cooling - This unit is capable Y0 J1
LR
V S VD MC
D
T1
C7
T2 C3 C37
S
Jumper
D1
of providing additional de-humidification during the
R5 R19
J8
R12
D
G
P
R7
C
C2
G
P
D2
R2 R8
C6
cooling mode by reducing the airflow when humidity (Do Not
BAR CODE R21
D7 D4
K1 R
R42
D6 D3
cut)
Q1
is above the set point. A conventional field supplied
D5 R25 R18
C17 C16 D11 C5 C4 D8 R39 R33
R24 R17 R40
D10 R10 R43
C23 R46
1
R9 U2
R28 R26 R27 R11 R15
R16
humidistat is required to control this function.
R41 16 1 R57 R58
D12 C25
D30 C24 17 64
C45 C44 D31
J9 D13 C36
C31 R23
Y1
C34
R32 R36 R20
1. Cut the BK jumper on the AFC.
R85 R82 R84 R38
O
L A V
32 49
S SD 3 .3
D15 C27 C26 D18 C29 C30 D19 C35
D16 33 48 R65 R64
B C43
C
X1 R78 R76
D
2. Using a field supplied humidistat, wire 24VAC Hot
Yo
R45 R49
N
R52 R54
G
R50 R55
R69 R72 R86
D20 R75 R71
C33 C32 D21
R
R91
to one side of the humidistat. Wire the other side of
R63 D26 C41 D27
R56 R74 D29 C49
R62 C59 R97
C48
Yo Jumper BK Jumper
C46
D22
R109
STATUS W2
W1
R106 D36
D24
R60
C53 U4
D35
the humidistat to the BK terminal on the low voltage
UNIT R66 R68 R102
D33 C52 C47
Q8 C40
R101
D25
R107
FAULT U3 L2
R110
R87
K2 R94 C58 C5
terminal board. See wiring diagram.
R88
R93
R70 R100 R104 MO
C39 R67 C38 C51
D32 D23
D28 L3
R80
R73
J6
S3
+13.8V
TEST
•• Pulse Width Modulation (PWM) - Typically used with
A/TCONT402 or zoning control. Airflow Control (AFC)
1. The BK jumper must be cut on the AFC.
- Do Not cut the Y0 jumper.
•• All zoning applications MUST be set to Constant
CFM mode.
Comfort Control Air Handler
W3
W2
W White W1
G Green BK
Y1 Yellow G
O Y2
R Red YI (In)
B Blue O
Y2 R
B
YO (Out)
Field wiring
Humidistat
35STEP 7 - Slide control plate assembly into the control
pocket until fully seated. The control plate should be
flush with the outer edge of the unit.
STEP 8 - Replace Coil panel making sure that the
wires are located within the wire pass-through pro-
vided in the panel.
Pass through
notch in coil
access door
36Section 14. Electrical - High Voltage
14.1 High Voltage Power Supply
The high voltage power supply must match the
equipment nameplate. ▲! WARNING
LIVE ELECTRICAL COMPONENTS!
Power wiring, including ground wiring, must comply During installation, testing, servicing, and troubleshooting of this
with national, state, and local codes. product, it may be necessary to work with live electrical com-
ponents. Failure to follow all electrical safety precautions when
Field wiring diagrams for supplementary electric exposed to live electrical components could result in death or
heaters are shipped with the heater. serious injury.
14.2 Make Electrical Connections
STEP 1 - Route High Voltage wiring to unit.
Conduit Entry Points
STEP 2 - Select a conduit entry point. Drill a hole
for the desired conduit size on units without a plug.
A locating target is identified on these units.
Note: Some models may have a pre-molded
conduit connection with plug. If a connection hole
is already present, remove the plug from the entry
point and use as is.
1. Select the entry point you will use to bring in
your high voltage wiring.
2. Remove plug from the entry point.
STEP 3 - Route conduit (if used) to the entry point
and connect.
1. Use one hand to secure the conduit nut from inside of
the heater compartment.
2. Connect a field supplied 3/4" or 1-1/2" conduit to
conduit nut.
Note: Reducing bushings may be required for your
application.
37STEP 4 - If an electric heater IS NOT being BLACK
RED
installed, remove the pigtail harness from the GREEN - GROUND
documentation pack and connect it to the plug
on the inside of the Heater Compartment in the
cabinet.
If an electric heater IS being installed, see
the Installer’s Guide shipped with the electric
heater.
Connect L1, L2, and ground wiring to pigtail
harness in Heater Compartment using wire
nuts. The incoming ground wiring will mate up
with the green wire shown in the illustration.
STEP 5 - If the L1, L2, and ground wires enter
the case from the left side, use a field supplied
1/2”-5/8” maximum length screw and wire tie to
hold the wires to the top center of the Heater
Compartment.
STEP 6 - Reinstall all panels before starting the air
handler.
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.
38Section 15. Unit Outline Drawing
MODEL NO. A B C D E F H FLOW GAS LINE LIQ LINE
CONTROL BRAZE BRAZE
TAM7A0A24H21SC 49.9 17.5 14.5 39.6 14.5 7.3 24.4 EEV 3/4 3/8
TAM7A0B30H21SC 55.7 21.3 18.4 45.5 18.4 9.2 24.8 EEV 3/4 3/8
TAM7A0C36H31SC 56.9 23.5 20.5 46.7 20.5 10.3 24.2 EEV 7/8 3/8
TAM7A0C42H31SC 56.9 23.5 20.5 46.7 20.5 10.3 24.5 EEV 7/8 3/8
TAM7A0C48H41SC 61.7 23.5 20.5 51.5 20.5 10.3 24.9 EEV 7/8 3/8
TAM7B0C60H51SB 61.7 23.5 20.5 51.5 20.5 10.3 24.9 EEV 7/8 3/8
39Section 16. Filters
16.1 Filter Considerations
•• A filter must be installed within the system.
•• A filter channel is provided in the unit, at the bot-
tom of the Blower/Filter compartment.
•• For customer ease of filter maintenance, it is
recommended that a properly sized remote filter
grill(s) be installed for units that are difficult to
access. Airflow should not exceed the maximum
rated velocity of the filter being used.
Filter in
Table 16.1 Filter Sizes air handler
cabinet
Cabinet Size* A B C (Upflow
Application)
Filter Size 16 x 20 20 x 20 22 x 20
* Cabinet size is indicated by the 7th digit in model number.
Section 17. Start Up
17.1 System Charge Adjustments
Sytem Matched with: Indoor Unit Model No. Outdoor Unit Model No. Subcooling
16 SEER HP TAM7A0B30H21SC 4A6H6024E/G, 4TWX6024E/G 9°
TAM7A0C36H31SC 4A6H6036E/G, 4TWX6036E/G 10°
TAM7A0C48H41SC 4A6H6048E/G, 4TWX6048E/G 8°
16 SEER AC TAM7A0B30H21SC 4A7A6024E/G, 4TTX6024E/G 8°
TAM7A0C36H31SC 4A7A6036E/G, 4TTX6036E/G 8°
TAM7A0C48H41SC 4A7A6048E/G, 4TTX6048E/G 8°
20 SEER HP TAM7A0B30H21SC 4TWZ0024A, 4A6Z0024A 9°
TAM7A0C36H31SC 4TWZ0036A/B, 4A6Z0036A/B 10°
TAM7A0C48H41SC 4TWZ0048A/B, 4A6Z0048A/B 12°
TAM7B0C60H51SB 4TWZ0060A, 4A6Z0060A 12 °
20 SEER AC TAM7A0B30H21SC 4TTZ0024A, 4A7Z0024A 9°
TAM7A0C36H31SC 4TTZ0036A/B, 4A7Z0036A/B 11°
TAM7A0C48H41SC 4TTZ0048A/B, 4A7Z0048A/B 13°
All other matches must be charged per the nameplate charging instructions.
4017.2 System Start Up
STEP 1 - Make sure all panels are securely in place
and that all wiring has been properly dressed and
secured.
STEP 2 - Set the system thermostat to OFF.
OFF
DONE CANCEL
STEP 3 - Turn on electrical power disconnect(s) to
apply power to the indoor and outdoor units.
ON
OFF
STEP 4 - Set the system thermostat to ON.
ON
DONE CANCEL
41Section 18. Sequence of Operation
18.1 Sequence of Operation
TAM7 Sequence of Operation 3. R-G contacts close on comfort control sending 24VAC to
the G terminal of the AFC.
Abbreviations
4. The AFC micro-processor sends a command to the serial
• AFC = Airflow Control communicating blower motor to run at 1st stage heating
• EVC = Expansion Valve Control cfm.
• EEV = Electronic Expansion Valve 5. The HUM contacts close.
• EHC = Electric Heat Control 6. R-Y2 contacts close on the comfort control sending
24VAC to Y2 terminal on the AFC.
• YI = Y signal from the comfort control
7. The Y2 signal is also passed through to provide power to
• YO = Y signal out of the AFC from the comfort control
the outdoor unit 2nd stage control circuit.
• Y2 = Y2 signal from comfort control
8. The blower motor will now run at 100% of the heating
cfm.
This unit has unique a feature that receives 24VAC analog
inputs from a conventional comfort control and then
converts these inputs to serial communicating signals
OD Single Stage (cooling mode)
between the different controls within the air handler. 1. R-Y contacts close on the comfort control sending
24VAC to Y1 terminal on the AFC.
The installing and servicing technician should have an
understanding of the sequence of operation to be able 2. Normally closed contacts on the AFC will pass 24VAC
to properly setup and diagnose functions of the air to the YO terminal providing power to the outdoor unit
handler. control circuit.
The dip switch settings on the control boards must be prop- a. Heatpump OD > R-O contacts close on the comfort
erly set to obtain the correct sequence of operation. control sending 24VAC to the O terminal of the AFC.
Reference the air handler and electric heat wiring dia- The AFC communicates to the EVC that the system is in
grams and dip switch configuration chart for additional cooling mode. The O signal is passed through to the OD
information. unit.
See unit, electric heat, and field wiring diagrams for ad- b. Non heatpump OD > OD dip switch configuration will
ditional information. communicate to the EVC to control superheat on a Y
only signal.
3. R-G contacts close on comfort control sending 24VAC to
Continuous Fan the G terminal of the AFC.
IMPORTANT: If the indoor air exceeds 60% relative 4. The AFC micro-processor sends a command to the serial
humidity or simply feels uncomfortably humid, it communicating blower motor to run at 100% of the cool-
is recommended that the indoor fan only be used ing cfm.
in the AUTO mode. 5. The EVC will receive input from the two temperature sen-
sors and start to control superheat.
1. R-G contacts close on comfort control sending 24VAC
to the G terminal of the AFC.
2. The AFC micro-processor sends a command to the OD Two Stage (cooling mode)
serial communicating blower motor to run at 50%. 1. R-Y1 contacts close on the comfort control sending
See airflow Dip Switch settings for additional info. 24VAC to Y1 terminal on the AFC. The AFC communi-
cates to the EVC to control superheat for 1st stage.
2. Normally closed contacts on the AFC will pass 24VAC to
Heatpump OD Single Stage (heating mode)
the YO terminal providing power to the outdoor unit 1st
1. R-Y contacts close on the comfort control sending stage control circuit.
24VAC to Y1 terminal on the AFC.
a. Heatpump OD > R-O contacts close on the comfort
2. Normally closed contacts on the AFC will pass 24VAC control sending 24VAC to the O terminal of the AFC.
to the YO terminal providing power to the outdoor unit The AFC communicates to the EVC that the system is in
control circuit. cooling mode. The O signal is passed through to the OD
3. R-G contacts close on comfort control sending 24VAC unit.
to the G terminal of the AFC. b. Non heatpump OD > OD dip switch configuration will
4. The AFC micro-processor sends a command to the communicate to the EVC to control superheat on a Y
serial communicating blower motor to run at 100%. only signal.
4. The HUM contacts close. 3. R-G contacts close on comfort control sending 24VAC to
the G terminal of the AFC.
Heatpump OD Two Stage (heating mode)
4. The AFC micro-processor sends a command to the se-
1. R-Y1 contacts close on the comfort control sending rial communicating blower motor to run at the 1st stage
24VAC to Y1 terminal on the AFC. cooling cfm. (1st stage cooling cfm is a multiplier of 2nd
2. Normally closed contacts on the AFC will pass 24VAC stage cfm)
to the YO terminal providing power to the outdoor unit
1st stage control circuit.
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