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if your existing
thermostat is marked:
label the wire
with this sticker:
R / RC
R/RC
R/RC
24 VAC Power Supply
Y1 / Y2
Compressor Stage 1 or 2
W2
W2
W2
Auxilliary Heat
E
E
E
Emergency Heat
C
C
C
24 VAC Common
HEAT PUMP SYSTEMS
O
O
O
Cool Mode Powered
Reverse Valve
B
B
B
Heat Mode Powered
Reverse Valve
G
G
G
Fan
L
L
L
System Monitor
if your existing
thermostat is marked:
label the wire
with this sticker:
Y1 Y2
Y2 Y1
Y1 Y2
See pages 74 for a complete wiring diagram.
44002-01 r051807