Robertshaw RS9210 Installation Manual page 12

WIRING
Terminal Designations
Heat Pump System
1 HEAT 1 COOL / 2 HEAT 1 COOL
Transformer Power
Transformer Common
Reversing Valve
Energized in HEAT
Reversing Valve
Energized in COOL
Fan Relay
First Stage of Emergency
HEAT
Second Stage of HEAT/
EMERGENCY HEAT
First Stage of
HEAT and COOL
Installation Tip:
Do not overtighten terminal block screws, as this can damage the terminal block. A damaged
terminal block can keep the thermostat from fitting on the subbase correctly or cause system
operation issues. Max Torque = 6in/Ibs.
10
Conventional System
1 HEAT 1 COOL / 2 HEAT 1 COOL
Transformer Power
Transformer Common
Energized in HEAT
Energized in COOL
Fan Relay
First Stage of HEAT
Second Stage of HEAT
First Stage of COOL