GR SERIES GAS FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS
SERVICE PROCEDURES AND ADJUSTMENTS
WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER AND FOLLOW LOCKOUT / TAGOUT PROCEDURES, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.
CONTROL THERMOSTAT
CALIBRATION
NOTE: Check the level of shortening in fry tank before proceeding. When the oil temperature is within normal operating range (325/F - 375/F), the level must be between the MIN & MAX fill lines.
1.Place a thermocouple in the geometric center of the fry tank 1" below the oil surface.
2.Set control thermostat to 350°F.
3.Allow the shortening temperature to stabilize (normally 3 cycles).
4.Record the temperature reading from the meter, at which the main burners turn off and turn on for at least two complete heating cycles.
5.Calculate the differential temperature by subtracting the temperature reading when the main burners turn off to the temperature reading when the main burners turn on.
[ Differential = Temp. (burners off) - Temp. (burners on) ] Example: 360/ (burners off) - 340/ (burners on) = 20/F.
The differential calculated should be less than 20/F.
A.If the differential is less than 20/F, the control thermostat is functioning properly.
B.If the differential is more than 20/F, the control thermostat is malfunctioning.
1)Install a replacement control thermostat as outlined under CONTROL THERMOSTAT in
REMOVAL AND REPLACEMENT OF PARTS.
6.Calculate the average temperature by adding the temperature reading when the main burners turn off to the temperature reading when the main burners turn on and divide this answer by 2.
[ Temp. (burners off) + Temp. (burners on) ] ÷ 2 =
Average Temp.
Example: 360/ + 340/ ÷ 2 = 350/F.
The average temperature should be 350°F (± 10°F).
A.If the average temperature reading is within tolerance, the control thermostat is properly calibrated.
B.If the average temperature reading is out of tolerance, continue with procedure.
7.To adjust:
A.Remove control thermostat knob.
B.Hold control thermostat shaft and turn the inner set screw clockwise to decrease temperature or counterclockwise to increase temperature (1/4 turn = 18/F).
C.Replace control thermostat knob and repeat step 6 for up to three attempts. Allow the main burners to cycle at least two times between adjustments before performing the calculation.
1)When calibration is successful, remove control thermostat knob and apply a
2)Replace control thermostat knob.
8.If the above adjustment cannot be obtained, install a replacement control thermostat as outlined under CONTROL THERMOSTAT in
REMOVAL AND REPLACEMENT OF PARTS.
F25125 (March 2003) |
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