Sample Wiring Diagrams
Page 7
R
C
G
Y1
Y2
W1
W2
O
E
L
R
C
G
Y1
Y2
W1
W2
O
24 vac common
24 vac return
fan relay
compressor relay
2nd stage compressor relay
1st stage heat circuit
2nd stage heat circuit
R
C
G
Y1
Y2
W1
W2
O
E
L
R
C
G
Y1
Y2
W1
W2
O
24 vac common
24 vac return
fan relay
compressor relay
reversing valve
Commercial Gas or Electric Heat ***,
Electric Cool, split systems & package units
including Commercial Heat Pumps **
No auxiliary heat, residential Heat Pumps ,
split systems & package units
7 Wire, 2 Stage Cooling, 2 Stage Heat
5 Wire, 1 Stage Cooling, 1 Stage Heat - Heat Pump*
Thermostat
Thermostat
* If using
residential heat pump
, this option
must be selected on during advanced setup.
**
Commercial heat pumps
do not have
the heat pump turned on in advanced setup.
*** If using electric heat, this option must
be selected on during advanced setup.
