CT51 Series
2
Label wires and remove old wallplate
Use a screwdriver to disconnect wires one by one. As you disconnect each
wire, wrap it with the label matching the letter on your old thermostat.
(Adhesive labels are supplied in your thermostat package.)
Remove the old wallplate only after all wires are labeled. Be careful not to
let loose wires fall into the wall opening.
Wrap supplied labels securely around each wire
Do not
let wires fall into wall opening!
IGNORE WIRE COLORS:
Use only letter designations
to identify wire types.
If your old thermostat has 7 or more wires (not counting terminals C or C1),
you may have purchased the wrong replacement thermostat. Stop now and call
1-800-468-1502 for advice.
Mark mounting position
1
Pull wires through base.
2
Level base if desired.
3
Mark positions of
both screw holes.
