42
TYPICAL THERMOSTAT WIRING DIAGRAMS
TYPICAL DUAL FUEL APPLICATION - TWO STAGE HEAT PUMP
W2
(6)
B
C
G
Typical
Two-Stage
Thermostat
Heat Pump
Outdoor Unit
Y2
B
Y2
R
Y
R
C
Y
D
W/E
V
+
S
–
(5)
YELLOW/BLUE
RED
BROWN
YELLOW
PURPLE
BLUE
12 FT.
OUTDOOR
SENSOR (2)
NOTES:
(1) FOR PROGRAMMING THERMOSTAT IN DUEL FUEL APPLICATION SEE
(1)
THERMOSTAT INSTALLATION INFORMATION.
(2) FOR REMOTE SENSOR INSTALLATION SEE THERMOSTAT INSTALLATION INFORMATION.
(3) OPTIONAL PLENUM SENSOR.
(4) FOR TWO STAGES CONNECT W2 ON THERMOSTAT TO W2 ON THE CONTROL BOARD.
(5) EMERGENCY HEAT (E) CONNECTION MAY NOT BE ALLOWED BY LOCAL CODES.
(6) 2-STAGE HP ONLY.
W
C
G
Furnace
Control
R
W2
PS
YH
(3)
YL
START-UP AND PERFORMANCE
Even though the unit is factory charged with Refriger-
ant-410A, the charge must be checked to the charge
table attached to the service panel and adjusted, if
required.
At initial start-up or after extended shutdown periods,
make sure the heater is energized for at least 12 hours
before the compressor is started. (Disconnect switch
on and wall thermostat off.)
Wiring Diagrams
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