Attach New Thermostat To Wallplate - Honeywell RTH7400D Owner's Manual

Step 9. Attach New Thermostat to Wallplate
1. Align the screw blocks with the pins on the back of
the thermostat.
WALLPLATE
2. Push the thermostat straight onto the wallplate until
it snaps into place.
3. Turn on the power at the heating and/or cooling
system or fuse/circuit breaker panel.
If the wires interfere with mounting the
thermostat to the wallplate, push the excess
wire back into the wall opening.
69-1726—1
TERMINAL SCREW BLOCK
24
PINS ON
BACK OF
THERMOSTAT
M22299