Whirlpool WAHU Installation Instructions Manual page 11

Low Voltage Connections
Thermostat
Cooling Only Application
Thermostat
Cooling Application with Electric Heat
Air Handler
R
G
BU
Condensing
Unit
Air Handler
R
G
W
BK
BU
Condensing
Unit
Thermostat
R
G
W
Heat Only Application
Thermostat
Air Handler
R
G
BU
W
BK
Connect common wire only if required.
See thermostat installation instructions.
Heat Pump Application with Electric Heat
Air Handler
Heat Pump Unit
11