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To set the thermostat, simply move the dial so that the indicating
line on the case points to the temperature at which the contacts
are to open.
Some of these thermostats are equipped with a special screw
"C" and disk "B" for making locked dial or limited maximum
setting. Instructions for making either adjustment are as follows:
Limited Maximum Setting: (Permits dial to be turned below a
desired setting, but not above it.)
1. Remove thermostat from mounting plate.
2. Loosen screw "A" using special key that is provided with
thermostat.
3. Move the dial so that the indicating line on the case points
to the maximum desired temperature.
4. Turn screw "C" clockwise to lower it. Rotate disk "B"
counterclockwise until stop "D" just passes over screw "C".
Raise screw "C" again by turning counterclockwise. Then
move disk "B" until stop "D" just touches screw "C" as shown
in diagram.
5. Tighten screw "A" and replace thermostat on mounting plate.
Locked Dial: (Dial cannot be turned above or below a desired
setting.)
1. Remove thermostat from mounting plate.
2. Loosen screw "A" using special key that is provided with
thermostat.
3. Move the dial so that the indicating line on the case points
to the desired temperature setting.
4. Check to make sure that screw "C" is in raised position (full
counterclockwise rotation), and that it is centered between
stops "D" and "E" as shown in diagram.
5. Tighten screw "A" and return thermostat to mounting plate.
NOTE
If neither a limited maximum setting nor a locked dial is desired,
simply lower screw "C" by turning clockwise. The thermostat will
then have the full range shown on dial.
Locked Case:
This feature is for the purpose of preventing tampering and
unauthorized adjustments. A special wrench is provided to
remove case for temperature adjustment.
Indicating
Summer
Dial
Position
INDICATING LINE
(ON CASE)
D
E
INDICATING LINE
(ON CASE)
E
LOCK SCREW
AT BOTTOM
OF CASE
3
OPERATION
Line
Figure 4
C
A
B
Figure 5
C
D
A
B
Figure 6
Figure 7
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