CT50 Series • Owner's Manual
69-2040EFS—04 2
M23789
M23790
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.
For CT51/CT55: 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 1800468
1502 for advice.
CT50/CT53/CT54
1. Pull wires
through base.
2. Level base if
desired.
3. Mark positions
of both screw
holes.
For CT50/CT53/CT54: If your old
thermostat has 3 or more wires
(not counting terminals C or C1),
you may have purchased the
wrong replacement thermostat.
Stop now and call 1800468
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
CT51/CT55
CT50/CT53/CT54 CT51/CT55
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