Installation Manual

Conventional 1 Stage Cooling

Label:
Function:

Y1
Compressor Relay (Stage 1)
G
Fan Relay
R
24VAC power from heating/cooling
transformer
W1
Heat Relay (Stage 1), Aux heat, Emergency
heat
C
24VAC Common Wire †
*/OB
Compressor Relay (Stage 2), Heat Relay
(Stage 2), Changeover Valve Relay (Stage 1)


Conventional 2 Cooling

Label:
Function:

Y1
Compressor Relay (Stage 1)
G
Fan Relay
R
24VAC power from heating/cooling
transformer
W1
Heat Relay (Stage 1), Aux heat, Emergency
heat
C
24VAC Common Wire †
*/OB
Compressor Relay (Stage 2), Heat Relay
(Stage 2), Changeover Valve Relay (Stage 1)



 
9