Frymaster 47 Series Installation & Operation Manual page 16

Thermostat Controller Calibration (For units equipped with thermostat controls,
perform the following procedure)
NOTE: The fryer control panel must be opened to perform thermostat calibration. In order to open
the control panel the thermostat knob must be removed from its shaft.
1. Fill the frypot to the lower OIL LEVEL line with cooking oil/shortening. If solid shortening is
used, it must be pre-melted before starting the calibration procedure.
2. Ensure the fryer ON/OFF Switch is in the "OFF" position, then light the pilot. (Refer to Chapter
3 for detailed lighting instructions.)
3. Insert a good grade thermometer or pyrometer into the frypot so that it touches the thermostat
guard.
4. Disconnect the solid extension shaft from the end of the flexible shaft using an appropriately
sized Allen wrench.
5. Remove the flexible shaft from the thermostat shaft screw.
6. Place the fryer ON/OFF switch in the "ON" position.
NOTE: If the burner does not light at this time, it does not mean the thermostat is defective.
Recheck the wiring, and then slowly turn the thermostat adjusting screw counterclockwise
until the burner lights. (Turning the adjusting screw counterclockwise causes the burner to
light and clockwise causes it to shut off.)
7. When the cooking oil/shortening temperature reaches 325°F (162°C), turn the thermostat
adjusting screw slowly clockwise until the burner shuts off.
8. Allow the fryer to sit for a few minutes, then slowly turn the thermostat adjusting screw
counterclockwise until the burner lights.
9. Repeat steps 7 and 8 at least three times to ensure an accurate setting is obtained. The
Thermostat Control is considered to be properly calibrated if the burner lights as the cooking
oil/shortening cools to 325°F (162°C), and not when the burner shuts off as the temperature rises.
10. Once the calibration point of 325°F (162°C) is determined, allow the burner to cycle on and off
at least 3 times to be sure it will light at the calibrated temperature.
11. After the calibration is complete, place the fryer power switch in the "OFF" position and
disconnect the fryer from the electrical supply.
12. Carefully install the thermostat flexible extension on the thermostat shaft, ensuring that the
setscrews are tight.
The adjusting screw must not be moved while installing the flexible extension shaft.
13. Install the solid metal extension shaft on the end of the flexible shaft with the stop pin at the 12
o'clock position. Ensure the stop pin and setscrews are tight to prevent slippage.
CAUTION
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