Cooking Control Calibration; Lift Assist Spring Adjustment - Vulcan-Hart ERA Series Service Manual

Electric fryers with kleenscreen plus filtration systems
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ERA & EBD SERIES ELECTRIC FRYERS - SERVICE PROCEDURES AND ADJUSTMENTS
COOKING CONTROL
CALIBRATION
1.
Verify condition of temperature probe as
outlined under TEMPERATURE PROBE TEST .
2.
Check the level of shortening in fry tank. The
level must be between the MIN & MAX fill lines
before proceeding.
3.
Place clamp on type amp meter around any
yellow lead wire of 2CON or 4CON.
4.
Allow shortening to cool below 300EF.
5.
Place a thermocouple in the geometric center of
the fry tank one inch below the shortening
surface.
6.
Set the cooking control to 350EF and turn the
fryer on.
7.
Monitor the current as it cycles on and off.
NOTE: Stir shortening to eliminate any cold zones.
A.
Allow heat to cycle three times to stabilize
shortening temperature.
Record meter reading from thermocouple
B.
when the current cycles off and on for at
least two complete heating cycles.
Calculate the average temperature by adding
8.
the temperature reading when the heat goes off
to the temperature reading when the heat
comes on & divide this answer by 2.
[ Temp. (Heat off) + Temp. (Heat on) ] ÷ 2 = Average Temp.
Example: 360° + 340° ÷ 2 = 350°F.
The average temperature should be
350EF (± 5EF).
A.
If the average temperature reading is
within tolerance, cooking control is properly
calibrated.
F25385 (May 2010)
B.
If the average temperature reading is out of
tolerance, loosen set screw to remove
temperature knob and adjust calibration
potentiometer.
NOTE: Ensure that the shaft and knob position does
not change when loosening set screw and removing
temperature knob, as this could affect calibration.
1)
9.
Repeat the average temperature calculation for
up to three attempts. Allow the cooking control
to cycle at least two times between adjustments
before performing the calculation.
10. If calibration is unsuccessful, the cooking
control may be malfunctioning and cannot be
adjusted properly. Install a replacement cooking
control and check calibration.
LIFT ASSIST SPRING
1.
Turn power switch off.
2.
Check spring tension:
A.
Raise heating elements to the full up
position. Elements should remain in place.
B.
Lower heating elements to the full down
position. Elements should remain in place.
C.
If the elements remain in place as
described, then no adjustment is
necessary. If the elements do not remain
in place, continue with procedure for
adjustment.
Page 14 of 32
Adjust calibration potentiometer
clockwise to increase temperature,
and counterclockwise to decrease
temperature.
a.
If over 25E of adjustment is
necessary, replace cooking
control.
ADJUSTMENT

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