CT87N/CT87K • Owner's Manual
69-1959EFS—02
2
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
CT87N
: 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.
CT87N
1. Pull wires
through base.
2. Level base if
desired.
3. Mark positions
of both screw
holes.
R
W
Y
CT87K
For
CT87K
: If your old thermostat
has 4 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.
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
CT87N
CT87K
