Robertshaw RS8110 Installation Manual page 14

WIRING
Typical 1H/1C heat pump system
COMPRESSOR
RELAY
FAN RELAY
Typical heat-only system with fan
FAN RELAY
HEAT RELAY
Tips:
24 V common wire may not be present in all systems.
12
L2
L1 (HOT)
COOL REVERSING
VALVE
HEAT REVERSING
VALVE
L2
L1 (HOT)
Typical heat-only system
HEAT RELAY
Typical cool-only system
COMPRESSOR
RELAY
FAN RELAY
L2
L1 (HOT)
L2
L1 (HOT)