CT30 Series • Owner's Manual
69-2338EFS—01 2
Wrapsuppliedlabelssecurelyaroundeachwire.Do not let wires fall into wall opening!
IGNORE WIRE COLORS: Use only letter
designations to identify wire types.
For CT31: If your old thermostat
has 5 or more wires (not counting
terminals C or C1), you may have
purchased the wrong replacement
thermostat. Stop now and call
1-800-468-1502foradvice.
1. Pullwires
through base
(CT31only).
2. Level base if
desired.
3. Markpositions
of both screw
holes.
For CT30/CT33: If your old
thermostathas3ormorewires
(not counting terminals C or C1),
you may have purchased the
wrong replacement thermostat.
Stopnowandcall1-800-468-1502
for advice.
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.
Label wires and remove old wallplate
Mark mounting position
CT30/CT33 CT31
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