Thermostat
RC
RH
G
W/E
1st Stage Heat
2nd Stage Heat
Y
C
Y2 O/B/W2
Single Stage Heat / Two Stage Heat- Furnace / Boiler with C wire
Thermostat
RC
RH
G
W/E
Y
C
Y2 O/B/W2
Combined Single Stage Heat and Single Cool Stage with C wire
( Remove Pre-installed Jumper )
Cool Furnace and Air Conditioner
11