Honeywell RTH8500D Use and Care Manual download pdf (Page 23)

23 69-1725-1

Step 9. Attach New Thermostat to Wallplate

1. Align the screw blocks with the pins on the back of the

thermostat.

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.

M22213

PINS ON

BACK OF

THERMOSTAT

WALLPLATE

TERMINAL

SCREW

BLOCK

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Honeywell RTH8500D Use and Care Manual Page 23