02/11
506650−01
*2P0211*
*P506650-01*
Page 1
2011 Lennox Industries Inc.
Dallas, Texas, USA
RETAIN THESE INSTRUCTIONS
FOR FUTURE REFERENCE
These instructions are intended as a general guide and do
not supersede local codes in any way. Consult authorities
having jurisdiction before installation.
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 qualified
installer or service agency.
IMPORTANT
The Clean Air Act of 1990 bans the intentional venting of
refrigerant (CFCs, HFCs, and HCFCs) as of July 1,
1992. Approved methods of recovery, recycling or
reclaiming must be followed. Fines and/or incarceration
may be levied for noncompliance.
IMPORTANT
This unit must be matched with an indoor coil as
specified in Lennox’ Engineering Handbook. Coils
previously charged with HCFC−22 must be flushed
NOTICE TO INSTALLER
UNIT PLACEMENT
It is critical for proper unit operation to place outdoor unit on an
elevated surface as described in
Unit Placement
section on page 8.
BRAZING LINE SET TO SERVICE VALVES
It is imperative to follow the brazing technique illustrated starting on
page 10 to avoid damaging the service valve’s internal seals.
It is critical for proper defrost operation to set the defrost termination
pins (P1) on the defrost control prior to starting system. See
Defrost
System
section on page 31 for further details.
DEFROST OPERATION
INSTALLATION
INSTRUCTIONS
T−CLASS
t
TPA*H4
Units
G and Y Voltage
HEAT PUMP UNITS
506650−01
02/11
Supersedes 11/10
TABLE OF CONTENTS
Shipping and Packing List
1
. . . . . . . . . . . . . . . . . . . . . .
General
1
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Unit Dimensions
2
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Model Number Identification
2
. . . . . . . . . . . . . . . . . . . . . .
Typical Unit Parts Arrangement
3
. . . . . . . . . . . . . . . . . . .
Operating Gauge Set and Service Valves
4
. . . . . . . . . . .
Recovering Refrigerant from Existing System
6
. . . . . . .
New Unit Placement
8
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
New or Replacement Line Set
8
. . . . . . . . . . . . . . . . . . . . .
Brazing Connections
10
. . . . . . . . . . . . . . . . . . . . . . . . . . .
Flushing Line Set and Indoor Coil
13
. . . . . . . . . . . . . . . .
Installing Indoor Metering Device
14
. . . . . . . . . . . . . . . .
Leak Test Line Set and Indoor Coil
15
. . . . . . . . . . . . . . .
Evacuating Line Set and Indoor Coil
16
. . . . . . . . . . . . .
Electrical
17
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Servicing Unit Delivered Void of Charge
22
. . . . . . . . . . .
Start−Up
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Refrigerant
22
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
System Operation
26
. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Defrost System
31
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Maintenance
36
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Checklist
39
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Shipping and Packing List
Check the unit for shipping damage and that all included
items listed below are intact. If damaged, or if parts are
missing, immediately contact the last carrier.
1 Assembled outdoor unit
1 Liquid line bi−flow filter drier
General
T−Class
TPA*H4 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
Lennox Engineering Handbook. TPA*H4 Heat Pumps are
designed for use in check expansion valve (CTXV)
systems.
Litho U.S.A.
