Honeywell RTH8500 Series - Select System Type; Heating Fan Control; Heat Pump Changeover Valve; Heating Cycle Rate

Advanced Installation Guide
69-2219EF—03 22
About your new thermostat
SETUPWIRINGASSISTANCETROUBLESHOOTING
Connect wires: Heat Pump
1. Match each labeled wire with same letter on new
thermostat.
2. Use a screwdriver to loosen screws, insert wires into
hole, then tighten screws.
3. If E and Aux do not each have a wire connected,
use a small piece of wire to connect them to each
other.
4. Push any excess wire back into the wall opening.
Labels don’t match?
If labels do not match letters on thermostat, see page
23.
Wiring—heat pump
M27516
RC
R
O/B
Y
G
C
L
E
AUX
LABELED WIRES
HEAT PUMP
INSERT WIRES
THEN TIGHTEN SCREWS
WIRE HOLE
Y
R
Aux
HEAT PUMP
G
O
SCREW