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26
SmartCommand Thermostat
Installation Manual
Heat pump HVAC system wiring
Figure 19 shows the wiring diagram for a heat pump HVAC system. Wire colors are typical thermostat color
codes.
Note:
Do not cut JP1 for heat pump systems. RC and RH are common for heat pumps.
Figure 19. Heat pump HVAC system wiring
SW1
STD
1
S2
2
OFF
Thermostat control unit
HP
ON
FUSE
JP1
24C COM
24V RH
24V RC
W1 Heat 1
Orange
W2/O CO
G Fan
Y1 Comp 1
Yellow
Y2 Camp 2
J4
HVAC system
Heat pump HVAC system
Thermostat
connections
Blue
C 24 VAC common
Red
R 24 VAC return
White
W1 Heat strips
O Changeover valve
Green
G Fan
Y1 Comp stage 1
Black
Y2 Comp stage 2
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