Robertshaw RS8110 Installation Manual page 13

Power supply.
1
Factory-Installed jumper. Remove only when installing on 2-transformer systems.
2
3 Use either O or B terminals for reversing valve. Heat pump application ONLY.
Use a small piece of wire (not supplied) to connect W and Y terminals.
4
Set fan operation switch to either gas or electric based on your system.
5
6 Optional 24 VAC common connection not to be used when powering thermostat with batteries.
Typical 1H/1C system: 1 transformer
C0MPRESSOR RELAY
FAN RELAY
HEAT RELAY
Typical 1H/1C system: 2 transformer
REMOVE JUMPER
L2
L1 (HOT)
WIRING
C0MPRESSOR RELAY
FAN RELAY
HEAT RELAY L2
L1 (HOT)
L2
L1 (HOT)
11