Remove Old Thermostat; Wire And Mount New Thermostat - Honeywell CT410A Owner's Manual

Remove Old Thermostat

WARNING Electrical Shock Hazard. Can cause severe injury, death
or property damage.
Begin by turning off power to the heating circuit at the main service
panel.
1. Remove cover of old thermostat—cover normally snaps off when pulled
firmly from the bottom. If it resists, check for a screw that locks the cover.
2. Loosen screws holding thermostat base to outlet box and lift away.
3. Disconnect wires from old thermostat. As you disconnect each wire, tape
the end and label it with the letter of the terminal designation to make
reconnection to new thermostat easier.
4. Check the old insulation for cracks, nicks or fraying, and apply high quality
plastic tape where necessary for adequate insulation.
5. Retain the old thermostat for reference purposes and until your new
thermostat is functioning smoothly.

Wire and Mount New Thermostat

1. Remove thermostat cover by grasping the top and bottom ends with
fingers, and pulling outward.
2. Connect wires to the thermostat as shown in the applicable wiring
diagram. Push the wires into the outlet box, and insert the thermostat
into the box for mounting by pushing against top and bottom of the
thermostat base.
IMPORTANT
Do not press on setting knob. Rough handling or strong pressure can damage
knob or sensing element, and change calibration.
3. Secure the thermostat to the box with the two captive mounting screws
provided.
4. Replace thermostat cover.
5. Set knob to desired room temperature.
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