Lennox T-Class TPA090S4S, T-Class TPA120S4S Installation Instructions Manual
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HCFCs AND HFCs) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance.
WARNING
This product and/or the indoor unit it is matched with may
contain fiberglass wool.
Disturbing the insulation during installation,
maintenance, or repair will expose you to fiberglass wool
dust. Breathing this may cause lung cancer. (Fiberglass
wool is known to the State of California to cause cancer.)
Fiberglass wool may also cause respiratory, skin, and
eye irritation.
To reduce exposure to this substance or for further
information, consult material safety data sheets.
INSTALLATION
INSTRUCTIONS
T-CLASSt TPA Series
7.5 AND 10 TON
HEAT PUMPS
7.5 TO 10 TONS
506148-01
12/2015
Supersedes 10/2011
Table of Contents
Shipping and Packing List 1......................
Outdoor Unit 1..................................
Unit Dimensions, Corner Weights and Center of
Gravities 2.....................................
Unit Plumbing Parts Arrangement 3...............
Unit Control Box Components Arrangement 4.......
Model Number Identification 4....................
Rigging the Unit for Lifting 4......................
Installation Clearances 5.........................
Line Set 5......................................
Refrigerant Charge and Check 8..................
System Operation 11.............................
Defrost System 11...............................
Defrost Control Board 11..........................
Maintenance 12..................................
Start-up and Performance Checklist 13.............
Shipping and Packing List
Check the unit for shipping damage and listed times below
are intact. If damaged, or if parts are missing, immediately
contact the last shipping carrier.
1 — Assembled outdoor unit
1 — Installation instruction
Outdoor Unit
Litho U.S.A.
WARNING
Improper installation, adjustment, alteration, service or
maintenance can cause personal injury, loss of life, or
damage to property.
Installation and service must be performed by a licensed
professional installer (or equivalent) or a service agency.
TPA series heat pumps, which will also be referred to in this
instruction as the outdoor unit, uses HFC-410A
refrigerant. This outdoor unit must be installed with a
matching indoor unit and line set as outlined in the TP
Engineering Handbook.
This outdoor unit is designed for use in thermal expansion
valve (TXV) systems only.
Unit Dimensions, Corner Weights and Center of Gravities
Corner Weights
Model No.
TPA090S4S 105 48 105 48 112 51 112 51
TPA120S4S 129 59 11 0 50 123 56 145 66
5
(127)
AA BB CC DD
lbs. kg lbs. kg lbs. kg lbs. kg
9−1/8
(232)
1−1/8
(29)
1−1/8
(29)
LIQUID
LINE
SUCTION
LINE
Model No.
TPA090S4S 21.75 552 29.0 737
TPA120S4S 20.0 508 28.25 718
OUTDOOR
FAN GUARDS
CENTER OF
GRAVITY
FF
Center of Gravities
EE FF
inch mm inch mm
OPTIONAL HAIL GUARD
(Field Installed All Coil Sides)
(Not used with Coil Guard)
INLET AIR
BBAA
EE
INLET AIR
2−1/2
(54)
REFRIGERANT LINE
CONNECTIONS DETAIL
OPTIONAL COIL GUARD
(Field Installed All Coil Sides)
(Not used with Hail Guard)
57−7/8
(1470)
DISCHARGE
COMPRESSOR
FORKLIFT SLOTS
(Both Sides)
FRONT VIEW
AIR
60−1/8
(1527)
BASE
ELECTRICAL
INLETS (Above
Refrigerant Lines)
OPTIONAL HAIL GUARD
(Field Installed All Coil Sides)
(Not used with Coil Guard)
CONTROL
BOX ACCESS
REFRIGERANT
LINE CONNECTIONS
SEE DETAIL
ELECTRICAL
INLETS (Above
Refrigerant Lines)
DD
TOP VIEW
DISCHARGE
AIR
LIFTING HOLES
(For Rigging)
SIDE VIEW
41−3/8
(1051)
43−5/8
(1108)
CC
OPTIONAL
INLET AIR
BASE
(Field Installed All Coil Sides)
(Not used with Hail Guard)
COIL GUARD
(Field Installed
All Coil Sides)
(Not used with
Hail Guard)
(286)
2 (51)
OPTIONAL
COIL GUARD
12
48−3/4
(1238)
45−1/4
(1149)
3−1/2
(89)
Page 2
Unit Plumbing Parts Arrangement
TPA090S4S
REVERSING
VALV E
HIGH PRESSURE
SWITCH (S4)
CHECK EXPANSIVE VALVE
(CTXV)
LOSS-OF-CHARGE
SWITCH (S24)
COIL
DEFROST SWITCH
LOCATION (S6)
TPA120S4S
DEFROST SWITCH
LOCATION (S9)
COMPRESSOR
LIQUID LINE BI-FLOW DRIER
HIGH PRESSURE
SWITCH (S4)
REVERSING
VALV E
SUCTION LINE SERVICE
VALV E
LIQUID LINE SERVICE
VALV E
CTXV SENSING BULB
DEFROST SWITCH
LOCATION (S6)
CTXV SENSING BULB
COMPRESSOR
LIQUID LINE BI-FLOW DRIER
Page 3
LIQUID LINE SERVICE
VALV E
COIL
CTXV SENSING BULB
LOSS OF CHARGE SWITCH
(S24)
SUCTION LINE SERVICE
VALV E
TP SERIES
Unit Control Box Components Arrangement
TPA090S4S AND TPA120S4S
TRANSFORMER
CONTACTOR (K1)
RUN CAPACITORS
Model Number Identification
T = T-Class™ Product Line
Brand/Family
P = Split System Heat Pump
Major Design Sequence
Unit Type
A = 1st Generation
B = 2nd Generation
Nominal Cooling Capacity -
(T1)
(C1, C2,)
TPA Y1120 S N4 S
Tons
090 = 7.5 Tons
120 = 10 Tons
DEFROST CONTROL
BOARD
RELAY (K149)
TERMINAL STRIP (TB14)
RELAY (K10)
GROUND LUG
Vol t ag e
Y = 208/230V‐3 phase‐60hz
G = 460V‐3 phase‐60hz
J = 575V‐3 phase‐60hz
Minor Design Sequence
1 = 1st Revision
2 = 2nd Revision
3 = 3rd Revision
Part Load Capability
N = Single Stage Compressor
Refrigerant Circuits
S = Single Circuit
Rigging the Unit for Lifting
Rig the unit for lifting by attaching four cables to the holes in
the base rail of the unit as illustrated in figure 5.
1. Remove protective packaging before rigging the unit
for lifting.
Page 4
Refrigerant Type
4 = R-410A
Cooling Efficiency
S = Standard Efficiency
2. Connect the rigging to the holes in each corner of the
unit's base.
3. All panels must be in place for rigging.
4. Place a field‐provided H‐style frame just above the
top edge of the unit. The frame must be of adequate
strength and length. (An H‐style frame will prevent
the top of the unit from being damaged.)
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