Fig. 42
THERMOSTAT TEST
1.
Position temperature tester probe in center of
griddle top plate, 8" down from the top edge.
2.
Turn griddle top on and set to 350°F. Allow
thermostat to cycle 3 times to preheat.
3.
Record temperature when indicator light turns
ON and OFF. Repeat for 3 cycles.
4.
Calculate the temperature differential.
Differential = Indicator Light OFF - Indicator Light
ON
Example
: 365 - 340 = 25°F differential
A.
Differential should be less than 50°F.
B.
If differential is greater than 50°F, replace
control thermostat.
5.
Calculate the average temperature.
Average Temperature =
Indicator Light OFF + Indicator Light ON
2
Example
: 365 + 345 = 710 ÷ 2 = 355°F
6.
If average temperature differs more than 50°F
from the dial setting, replace thermostat.
HEATING ELEMENT TEST
1.
Measure voltage at heating element leads and
verify against data plate voltage.
A.
If voltage is incorrect, find the source of the
problem.
B.
If voltage is correct, check current draw
(amps) through the heating element lead
wires.
NOTE:
This method is preferred over a resistance
check when a clamp on type amp meter is available.
2.
If current draw is correct then heating element is
functioning properly.
See following table for proper values.
3.
If current draw is not correct, turn griddle top OFF
and disconnect the electrical supply.
A.
Replace heating element then proceed to
step 5.
4.
If unable to check current draw, a resistance
check may indicate a malfunctioning element.
A.
Disconnect electrical supply and remove
lead wires from heating element. Check
resistance (ohms).
See following table for proper values.
5.
Check for proper operation.
VOLTS
POWER
AMPS
OHMS
208
3.6 kW
17.3
12
240
3.6 kW
15
16
NOTES:
1.
Values in table are nominal.
Tolerance is +5/-10%.
2.
Resistance values (ohms) are @
77°F room temperature.
VMCS HEAVY DUTY ELECTRIC GRIDDLE TOP - SERVICE PROCEDURES AND ADJUSTMENTS
Page 15 of 19
F45571 (0316)
