T4098A,B DELUXE ELECTRIC HEAT THERMOSTATS
68-0146—3
5
Check Calibration
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Turn the setting knob clockwise until the switch makes
(clicking sound). The heating equipment and fan start.
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No recalibration is necessary if the thermostat switch
makes with the thermostat setting at the same
temperature as indicated on the thermometer.
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If the thermostat setting differs from the thermometer,
record the temperature difference and recalibrate as
instructed in the Recalibration Procedure section.
Recalibration Procedure
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Note the temperature difference between the
temperature setting and the thermometer.
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Remove the thermostat cover.
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With the thermostat cover removed, note the location of
the temperature setting knob.
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Remove the clear plastic knurled setting knob. See
Fig. 5.
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Turn the temperature setting dial the required number
of degrees for calibration (so thermostat temperature
setting and thermometer are the same).
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Replace the knob on the setting dial.
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Replace the thermostat cover and recheck the
calibration.
Setting Range Stops
Use the range stops (included) to limit the maximum and
minimum temperatures that may be set.
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Move the thermostat setting knob to the desired
maximum temperature.
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Remove the thermostat cover.
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Adjust the knob indicator tab between the range stop
positions to prevent interference.
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Insert the range stop pins in the desired positions on
the back of the thermostat cover. See Fig. 6.
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Make sure pins are completely seated before replacing
the thermostat cover.
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Replace the thermostat cover and check the range
stops.
Locking Cover
The thermostat cover may be locked using the locking cover
screws included. Locking the cover prevents unauthorized
tampering of the thermostat temperature setting.
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Remove the thermostat cover.
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Insert the locking cover clip (included) into the slot on
the back of thermostat base as shown in Fig. 7.
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Using an Allen wrench, insert the locking cover screw
into the clip. Secure the screw in place until it is flush
with the thermostat base.
M5793
THERMOSTAT
BASE
DUAL-DIAPHRAGM
SENSING ELEMENT
SETTING DIAL
CLEAR PLASTIC
KNURLED
SETTING KNOB
Fig. 5. Calibrating thermostat.
M5800
2
8
24
20
C 16
12
8
0
70
F
60
50
INSIDE VIEW
OF THERMOSTAT
COVER
INSERT PINS INTO
TEMPERATURE
STOP POSITIONS.
Fig. 6. Setting range stops.
