Oil Breakdown; Thermostat Calibration; Thermostat Bulb Positioning; Service - Keating Of Chicago 2006 Series Manual

OIL BREAKDOWN

As part of a "Preventive Maintenance Program", the
oil in your fryer needs to be fi ltered regularly to avoid
breakdown. The initial investment in the frying system
is less than the total overall costs of oil during the life
of the fryer, and with regular fi ltering, you can realize
substantial savings in oil costs as well as mainte-
nance charges.
LIMITED CALIBRATION
(Less than 25° difference)
You will need:
One screwdriver with 1/8"
wide fl at blade
One accurate fryer
thermometer
1. Set thermostat to desired frying temperature.
2. Allow thermostat to cycle three times.
2. Allow fryer to cycle three times.
3. Place an accurate thermometer in the oil at the
tip of the thermostat bulb.
NOTE: Locate thermometer in same position for
every calibration.
4. If calibration of fryer is found to be less than 25°F
off, simply loosen the four retaining screws hold-
ing the dial plate in place. Reset the dial plate to
match the thermometer reading. If the fryer is found
to be more than 25°F off, a qualifi ed service com-
pany must be contacted to have the fryer properly
calibrated.
DO NOT ADJUST THE THERMOSTAT SET SCREW - IT
VOIDS ANY WARRANTY ON PART.

THERMOSTAT BULB POSITIONING

BEFORE REPLACING, TEST THERMOSTATS
NOTE: Operational problems can easily be corrected
by thermostat bulb positioning.
Keating's patented thermostat application is accurate
within 2°F of the dial setting between 250°F – 350°F.
This accuracy is attained only if the thermostat bulb
is placed properly against the heat transfer 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.*
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Thermostat knob removed
to reveal calibration screws
1. *For 14" IFM Fryers:
• The end of thermostat bulb should touch the
burner tube.
1. For 18" & 20" IFM Fryers:
• 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.
overshoot.
• 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.
Figure 8
18" & 20" IFM
Thermostat bulb
positioning


SERVICE

ALL HI-LIMIT CONTROLS ARE PRESET AT THE
FACTORY FOR A SPECIFIC TEMPERATURE. DO NOT
ATTEMPT TO CHANGE THE SETTING OF THE HI-
LIMIT. IF THE HI-LIMIT FAILS TO SHUT OFF BETWEEN
425°F AND 450°F DURING TESTING, IT MUST BE
REPLACED.
FLAME ADJUSTMENT
A. Gas Pressure
1. At gas valve, remove adjustment port cover, rotate
adjustment screw with screwdriver and replace port
cover.
2. To check the gas pressure (3" WC for natural
gas or 10" WC for Propane at the manifold), use an
allen wrench to remove the gas pressure test port,
located in the center of the manifold.
3. Line pressure (incoming pressure) is critical for
proper ignition of the IFM. Incoming pressure must
be:
Natural - 7" W.C.
Propane - 11" W.C.