Robertshaw RS8210 Installation Manual page 12

WIRING
Caution: Electrical Hazard
Failure to disconnect the power
before beginning to install this
product can cause electrical
shock or equipment damage.
Wiring
1. If you are replacing a thermostat, make
note of the terminal connections on the
thermostat that is being replaced. In some
cases the wiring connections will not be
color coded. For example, the green wire
may not be connected to the G terminal.
2. Loosen the terminal block screws. Insert
wires then retighten terminal block screws.
Installation Tip:
Do not overtighten terminal block screws, as this can damage the terminal block. A damaged
terminalblockcankeepthethermostatfromfittingonthesubbasecorrectlyorcausesystem
operation issues. Max Torque = 6in/lbs.
10
Warning:
All components of the control
system and the thermostat
installation must conform to
Class II circuits per the NEC Code.
Terminal Designations
Heat Pump System
1 HEAT 1 COOL / 2 HEAT 1 COOL
RH/R
Transformer power
C
Transformer Common
Reversing Valve
B
Energized in HEAT
Reversing Valve
0
Energized in COOL
G
Fan Relay
W/E
First Stage of Emergency HEAT
Second Stage of HEAT/
W2
EMERGENCY HEAT
Y
First Stage of HEAT and COOL
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