Page 1
©
2006 Lennox Industries Inc.
Corp. 0632
−
L6
TPA*S4
Service Literature
3, 3.5, 4 and 5 ton
10.5, 12.3, 14 and 17.6 kW
Revised 05−2009
T−CLASS
t
TPA*S4 COMMERCIAL SERIES UNITS
The TPA*S4 is a HFC−410A commercial split-system
heat pump. The series is designed for use with expansion
valves (TXV). All TPA*S4 units utilize scroll compressors.
TPA*S4 series units are available in 3, 3.5, 4 and 5 ton
capacities. All major components (indoor blower and coil)
must be matched according to Lennox recommendations
for the compressor to be covered under warranty. Refer to
the Engineering Handbook for approved system
matchups.
This manual is divided into sections which discuss the
major components, refrigerant system, charging
procedure, maintenance and operation sequence.
Information contained in this manual is intended for use by
qualified service technicians only. All specifications are subject
to change.
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.
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.
Table of Contents
Specifications / Electrical Data
Page 2
. . . . . . . . .
Optional Accessories
Page 3
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I Unit Components
Page 4
. . . . . . . . . . . . . . . . . . .
II Refrigerant System
Page 8
. . . . . . . . . . . . . . . . .
III Charging
Page 10
. . . . . . . . . . . . . . . . . . . . . . . . .
IV Maintenance
Page 16
. . . . . . . . . . . . . . . . . . . . . .
V Diagrams
Page 17
. . . . . . . . . . . . . . . . . . . . . . . . .
MODEL NUMBER IDENTIFICATION
T P A
Y
1
036 S
4
4 n
Major Design Sequence
A = 1st Generation
B = 2nd Generation
Brand/Family
T = T−Class
t
Product Line
Unit Type
P = Heat Pump Outdoor Unit
Nominal Cooling Capacity − Tons
036 = 3 Tons
042 = 3.5 Tons
048 = 4 Tons
060 = 5 Tons
Cooling Efficiency
S = Standard Efficiency
Minor Design Sequence
1 = 1st Revision
2 = 2nd Revision
3 = 3rd Revision
Voltage
Y = 208/230V-3 phase-60hz
G = 460V-3 phase-60hz
Refrigerant Type
4 = R−410A
Part Load Capability
N = No part load, single stage compressor
Coil type
4 = Four−sided
