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5-3
MONTHLY CHECKS AND SERVICE
Check Calibration of Analog Controller Thermostat Control Knob
(This check applies only to units equipped with Analog Controllers)
1. Insert a good-grade thermometer or pyrometer probe into the oil, with the end touching the fryer
temperature-sensing probe and set the thermostat knob to frying temperature.
2. After the set temperature is reached, let the burner cycle on and off automatically three times to
allow the cooking oil temperature to become uniform. If necessary, stir to get all shortening in
the bottom of the frypot melted.
3. When the burner starts for the fourth time, the thermometer/pyrometer reading should be within
± 5ºF (2ºC) of the thermostat knob setting. If it is not, calibrate as follows:
a. Loosen setscrew in thermostat control knob until the knob will rotate freely on its shaft.
b. Rotate the knob until the index line on the knob is aligned with the marking that corresponds
to the thermometer or pyrometer reading.
c. Hold the knob and carefully tighten the setscrew.
d. Recheck the thermometer/pyrometer reading against the thermostat knob setting the next
time the burner lights.
e. Repeat steps 3.a. through 3.d. until the thermometer/pyrometer reading and knob setting
agree within ± 5ºF (2ºC). If calibration cannot be obtained for any reason, call a Factory
Authorized Service Center for assistance.
5. Remove the thermometer or pyrometer.
Check Computer Magic III.5 Set Point Accuracy
(This check applies only to units equipped with Computer Magic III.5 Controllers.)
1. Insert a good-grade thermometer or pyrometer probe into the oil, with the end touching the fryer
temperature-sensing probe.
2. When the computer display shows a series of four dashes “----” with no dot between the first and
second dashes (indicating that the frypot contents are within the cooking range), press the
switch once to display the temperature of the cooking oil as sensed by the temperature probe.
3. Press the switch twice to display the set point.
4. Note the temperature on the thermometer or pyrometer. All three readings should be within
± 5ºF (2ºC) of each other. If not, contact a Factory Authorized Service Center for assistance.