INSTALLATION INSTRUCTIONS
69-1122
FLAT BLADE
SCREWDRIVER
HAND OR POWER
DRILL WITH 3/16 INCH
DRILL BIT, IF NEEDED TO
DRILL HOLES IN WALL
WIRE CUTTER/STRIPPER OR SHARP
KNIFE, IF NEEDED TO STRIP WIRES
MASKING TAPE, IF NEEDED
TO LABEL WIRES AS THEY
ARE DISCONNECTED FROM
OLD THERMOSTAT
SPIRIT LEVEL, IF NEEDED TO LEVEL
THERMOSTAT FOR APPEARANCE
M849
®U.S. Registered Trademark
TD41
Heating/Air Conditioning Thermostat
The TD41 is for most gas or oil heat/
electric air conditioning systems.
Do-it-yourself model
Your New TD41 Thermostat
Your new TD41 Heating/Cooling Thermostat replaces
most 15 to 30V, 4-wire, heating/cooling system thermo-
stats. The TD41 is suitable for gas or oil heat/electric air
conditioning systems (not for heat pumps).
1
PREPARATION
You can properly install your new thermostat if you
follow the instructions step-by-step. It is
recommended that as you read, understand and complete
each step, you check
√
it off in the box with a pencil or
pen. If you are unsure about wiring procedures, please call
a qualified service technician for assistance.
Check thermostat suitability for your home’s system
by reviewing Your New TD41 Thermostat section.
Assemble tools required, as shown in illustration.
Make certain that your burner and air conditioner
(where applicable) are working, especially if they
were inoperative for any period of time. If either does not
work, contact your local heating/air conditioning dealer. Do
not operate the air conditioning system when outdoor
temperature is below 50
°
F (10
°
C).
Carefully unpack your new thermostat.
Save the package of screws and the instructions
pages.
