Lennox TPA036H4N4 Installation Instructions Manual page 19

WIRING CONNECTIONS
1. Install line voltage power supply to unit from a properly sized disconnect switch. Any excess high voltage field wiring
should be trimmed or secured away from the low voltage field wiring.
THERMOSTAT
INDOOR UNIT
POWER
R
COMMON
C
W1
FIRST STAGE
AUXILIARY. HEAT
INDOOR BLOWER
G
REVERSING VALVE
O
COMPRESSOR
Y1
(SOME CONNECTIONS MAY NOT APPLY. REFER
TO SPECIFIC THERMOSTAT AND INDOOR UNIT.)
Figure 15. TPA*H4 and Blower Unit Thermostat
Designations
Figure 14. Typical 460 VAC Unit Wiring Diagram
OUTDOOR UNIT
POWER
R
COMMON
C
W1
W1
FIRST STAGE
AUXILIARY. HEAT
W2
W3
G
Y1
THERMOSTAT
POWER
R
COMMON
R
C
C
E
EMERGENCY HEAT
W1
FIRST STAGE
AUXILIARY. HEAT
INDOOR BLOWER
O G
REVERSING VALVE
O
COMPRESSOR
Y1
(SOME CONNECTIONS MAY NOT APPLY. REFER TO
Figure 16. Outdoor Unit and Blower Unit Thermostat
Designations (with Auxiliary Heat)
Page 19
INDOOR UNIT
R
COMMON
C
EMERGENCY
HEAT RELAY
OUTDOOR T'STAT
W1
FIRST STAGE AUXILIARY.
W2
HEAT
W3
G
SPECIFIC THERMOSTAT AND INDOOR UNIT.)
OUTDOOR UNIT
POWER
R
C
W1
O
Y1
TPA*H4 SERIES