Sample Wiring Diagrams
Page 6
Dual Fuel
R
C
G
Y1
Y2
W1
W2
O
E
L
R
RS1
RS GND
RS+5
C
G
Y1
Y2
W1
W2
W3
W
Furnace
O
24 vac common
24 vac return
fan relay
1st Stage compressor
Reversing valve
2nd stage heat circuit (often electric)
7 Wire, 1 Stage Cooling, 2 Stage Heat, Heat Pump with 2nd fuel source Furnace
Most residential split and package heat pumps
with auxiliary heat
Thermostat
Remote Sensor
Wireless or
Hard wired
RED
BLACK
WHITE
