Sample Wiring Diagrams
4 Wire, 1 Stage Cooling, 1 Stage Gas Heat
POWER
FAN
COOLING
GAS OR
ELECTRIC HEAT
W
Y
B
O
G
R
Page 11
Residential Gas or Electric Heat *,
Electric Cool, split systems & package
units
4 Conductor 18 to 22 gauge
unshielded cable from the
thermostat to the equipment.