PREVENTIVE MAINTENANCE
Preventive maintenance should be done in daily, week-
ly, monthly and yearly intervals as necessary. Following
preventive maintenance procedures will help keep your
fryer working efficiently. Proper care and servicing will
lead to years of quality performance.
PREVENTIVE MAINTENANCE CHART
*High production facilities should be checked more
often. Contact your local service company to perform
maintenance and repairs.
HI-LIMIT CHECK BI-MONTHLY
The manual Hi-Limit test button can be used to test the
Hi-Limit Control by pushing and holding the button in
until the fryer reaches the Hi-Limit temperature
(425°F). Place an accurate thermometer in the oil. If
the Hi-Limit Control doesn’t shut off the fryer between
425°F and 450°F, have it replaced.
THERMOSTAT CALIBRATION
You will need:
One screwdriver with 1/8" wide flat blade
One accurate fryer thermometer
1. Set thermostat to desired frying temperature.
2. Allow fryer to cycle three times.
3. Place an accurate thermometer in the oil.
Thermostat calibration
NOTE:
Locate thermometer in same position for
every calibration. Left front corner of fryer vessel at
the High Limit Bulb is recommended.
4. If temperature of fryer is found to be more or less
than 15°F off, remove the thermostat knob. There
are (4) screws holding the dial plate in place.
Loosen the screws and reset the dial plate to
match the thermometer reading.
BEFORE REPLACING, TEST THERMOSTATS
These operational problems can easily be correct-
ed by thermostat bulb positioning.
Keating’s patented thermostat application is accu-
rate within 2°F of the dial setting between 250°F –
350°F. This accuracy is attained only if the thermo-
stat bulb is placed properly against the heat trans-
fer tube. To quickly and accurately test for proper
bulb placement, a single thickness of writing paper
should be pulled through between the tube and the
bulb with medium resistance.*
1. *For gas fryers 14":
The end of thermostat bulb should touch the burn-
er tube.
2. For gas fryers 10x11, 18 & up:
If the bulb is too loose, the paper will slip through
with little or no resistance. A fryer with a thermostat
bulb that is too loose will overshoot.
Overshoot
: The thermostat takes a long time to
cycle and then misses its preset temperature by
20°F - 40°F yielding a poor quality product.
If the bulb is too tight, the paper will either not pull
through or it will tear. A fryer with a thermostat bulb
that is too tight will short cycle.
Short Cycle
: The thermostat will cycle rapidly while
the fryer is in the idle mode; the temperature will be
erratic.
Thermostat Bulb Positioning 10x11, 18 & up Fryer Gas
TIME OPERATOR/OWNER
FRAME
Daily*
Check lights and controls.
Check that the oil is up to “Fill Level” Line.
Clean all baskets.
Drain, strain or filter oil.
Weekly*
Drain and clean fryer.
Boil-out fryer.
BiMonthly
Hi-Limit & Test procedures.
Monthly*
Check calibration of the thermostat.
Yearly*
QUALIFIED SERVICE
PERSONNEL ONLY
Check burner flame color and adjust air
shutters.
Remove and clean all orifices.
Check and replace radiants.
9
