Honeywell CT1503 - Manual (Page 5)

REMOVE OLD THERMOSTAT
□ Remove cover of old thermostat. If the cover
doesn't snap off when pulled firmly from the
bottom, check for a screw that locks the cover on.
□ Before removing the old thermostat from the
wall, look at it carefully to locate the heat
anticipator adjustment mechanism. (See illustration
to help you recognize the heat anticipator.) Make a
note here] jof that anticipator setting for
future reference. If your thermostat does not have a
heat anticipator, do not be concerned. Move orh to
next paragraph.
□ Loosen screws holding thermostat to wallplate,
subbase or wall and lift away.
OLD THERMOSTAT
ANTtCIAATOR
SCALE
□ Disconnect wires from old thermostat, wall­
plate or subbase. Tape each wire and label
with the letter of the terminal designation to make
reconnection easier. If there are only two wires,
labeling is not necessary.
----------------------tMPORTANT—------------------ '
If old thermostat has B or O terminals, this
thermostat cannot be used on your system.
EXCEPTION: The CT1502 thermostat can be
used on a system witti B or O terminals.
'01,0 THERMOSTAT
ANTICIPATOR
setting lever
One or two extra wires?
If you are replacing a Honeywell Chronotherm
thermostat you may find one or two wires that go to
the clock terminals on the Chronotherm thermostat
wiring wallplate. Do not allow them to touch, or you
may damage your transformer. Disconnect the
wires, and wrap them separately, using electrical
tape. Do not wrap them together. Place the wires
where they will not interfere with the operation of
the new thermostat. Record the colors and terminal
designation labels of the rest of the wires.
69-0273—9