Hot Top Thermostat Calibration - Vulcan-Hart ev12 Service Manual

EV Series Electric Ranges - SERVICE PROCEDURES AND ADJUSTMENTS
4. Note tester reading when the indicator light turns
ON and OFF.
5. Add these two temperatures together then divide
the sum by 2 to obtain an average temperature.
A. If the average temperature is within 25°F of
the set temperature, the thermostat is
calibrated.
B. If the average temperature is not within 25°F
of the set temperature:
1) Remove thermostat knob. Maintain
thermostat setting during removal.
2) Hold thermostat stem to prevent
movement. Insert a flathead
screwdriver into thermostat stem until
it reaches the calibration screw.
Fig. 35
3) Turn adjustment screw clockwise to
increase and counterclockwise to
decrease temperature.
NOTE: A 1/4 turn equals 35°F change.
6. Replace knob and repeat steps 3 to 5 until
average temperature is within 25°F of set
temperature.
7. Reseal adjustment screw to prevent movement.
8. If thermostat cannot be calibrated, replace
thermostat as outlined under GRIDDLE AND
HOT TOP THERMOSTATS .
HOT TOP THERMOSTAT
1. Clean temperature test area surface in the center
of the Hot Top then place temperature tester
surface mount probe at that location.
2. Set thermostat to 350°F.
3. Allow the thermostat to cycle three times.
4. Note the tester reading when the indicator light
turns ON and OFF.
5. Add these two temperatures together, then
divide the sum by 2 to obtain an average
temperature.
A. If the average temperature is within 25°F of
the set temperature, the thermostat is
calibrated.
B. If the average temperature is not within 25°F
of the set temperature:
1)
2)
3)
NOTE: A 1/4 turn equals 35°F change.
Page 17 of 33
CALIBRATION
Remove thermostat knob. Maintain
thermostat setting during removal.
Hold thermostat stem to prevent
movement. Insert a flathead
screwdriver into thermostat dial stem
until it reaches the calibration screw.
Fig. 36
Turn adjustment screw clockwise to
increase and counterclockwise to
decrease temperature.
F45586 (0716)