Honeywell RTH7400 - Connecting Wires: Heat Pump Systems; Heat Pump Wiring

Installation Guide
69-2104ES—01 10
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 12.
M28104
Aux
E
L
C
G
Y
O/B
RC
R
LABELED WIRES
SCREW
HEAT PUMP
INSERT WIRES
THEN TIGHTEN SCREWS
WIRE HOLE
Y
G
R
Au
x
O
HEAT PUMP