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CT410A,B LINE VOLTAGE ELECTRIC HEAT THERMOSTATS
69-1681EF—1 2
2 REMOVE OLD THERMOSTAT
WARNING
120V to 240V Line Volt Electrical Shock
Hazard.
Can cause serious injury or death.
Turn off power to the heating circuit at the
main service panel before beginning
installation.
❑ Remove cover of old thermostat—cover
normally snaps off when pulled firmly from the
bottom. If it resists, check for a screw that locks
the cover.
❑ Loosen screws holding thermostat base to
outlet box and lift away.
❑ Disconnect wires from old thermostat. As you
disconnect each wire, tape the end and label it
with the letter of the terminal designation to
make it easier to reconnect the new thermostat.
❑ Check the old insulation for cracks, nicks or
fraying, and apply high-quality plastic tape,
where necessary, for adequate insulation.
❑ Retain the old thermostat for reference until
your new thermostat is functioning smoothly.
3 WIRE AND MOUNT NEW
THERMOSTAT
❑ Remove thermostat cover by grasping the top
and bottom ends with your fingers, and pulling
outward.
❑ Connect wires to the thermostat as shown in the
applicable wiring diagram. Push the wires into
the outlet box, and insert the thermostat into the
mounting box by pushing against the top and
bottom of the thermostat base.
IMPORTANT
Do not press on the setting knob.
❑ Secure the thermostat to the box with the two
captive mounting screws provided.
❑ Replace the thermostat cover.
❑ Set the knob to the desired room temperature.
IMPORTANT
Rough handling or strong pressure can
damage the knob or sensing element and
change the calibration.
L1
(HOT) L2
1
1
1
2
3
4
3
2
4
4
POWER SUPPLY. PROVIDE DISCONNECT MEANS AND OVERLOAD
PROTECTION AS REQUIRED.
BREAKS ON POSITIVE OFF.
EXPOSED UNUSED LEADWIRES TO BE PROPERLY INSULATED.
THERMALLY ACTIVATED—BREAKS ON TEMPERATURE
RISE. MAKES ON TEMPERATURE FALL.
L2
L1 L1
T2
T1 T1
CT410A
CT410B
3
ELECTRIC
HEATER
CAUTION:
SPECIAL SERVICE CO/ALR SOLDERLESS CONNECTORS MUST
BE USED WHEN CONNECTING WITH ALUMINUM CONDUCTORS;
OTHERWISE, A FIRE HAZARD CAN RESULT.
TO
ELECTRIC
HEATER
M1952
7
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