Lennox X4146 - Remove Existing Thermostat

Page 3
Remove Existing Thermostat
If this thermostat is being used to re-
place an existing thermostat, remove
the old thermostat:
1 − Turn off power at the heating and/or
cooling system or fuse/circuit
breaker panel.
2 − Remove the cover from the existing
thermostat.
3 − Remove securing screws and re-
move existing thermostat from wall
or wallplate. Disconnect the exist-
ing wires.
4 − Remove any remaining portion of
the existing thermostat from the
wall. Do not install the replacement
thermostat faceplate on the exist-
ing wallplate. Though the wall-
plates may appear to be the same
and the faceplate may fit on the ex-
isting wallplate, the terminal posi-
tions may vary in important ways.
In addition, serial number and part
number information is carried on
the replacement wallplate.
Do not allow the thermostat wires
to fall behind the drywall.
WARNING
This thermostat must be
installed using the provided re-
placement wallplate.
Failure to do so will bypass ther-
mostat control and activate con-
tinuous heating.
Y
G
C
R
W
OLD THERMOSTAT
.18
.
2
.
25
.
3
.
9
.
7
.
5
.
4
L
O
N
G
E
R
THERMOSTAT
COVER
WALLPLATE
WARNING
MERCURY NOTICE
If the existing thermostat includes a mercury bulb, the thermostat must
be disposed of properly.
Contact your local waste management authority for instructions re-
garding recycling and proper disposal of thermostats which include
mercury bulbs.