CT87N/CT87K • Owner's Ma nual
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
has7ormorewires(not counting
terminals C or C1),youmayhave
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. Markpositions
of both screw
holes.
R
W
Y
CT87K
For CT87K: If your old thermostat
has4ormorewires(not counting
terminals C or C1),youmayhave
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
thelabelmatchingtheletteronyouroldthermostat.(Adhesivelabelsaresuppliedinyour
thermostatpackage.)
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 wallplateMark mounting positionCT87N CT87K