Dean 1414E, Installation & Operation Manual

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7
7.3 Poor temperature control on the hot
side; excessive temperature overshoot
during warm-up; over heating,
scorching; high-limit switch must be
reset often.
a) Check temperature controller [see item
(a) in section 7.2].
b) Check RTD probe (see section 7.4).
c) Check that the thermostat bulb or RTD
probe in the vessel has not been
knocked loose from its operating
position. It should be clamped to the
element with 1/16" spacing.
7.4 PROBE TEST:
The Thermatron controller is equipped with a
built-in probe test. This is located adjacent to
the temperature adjustment on the control, and
is marked "probe test". This test can help
diagnose several problems:
a) If the fryer turns off at some point below
the dial setting and will not come back
on until the oil temperature drops very
low, there may be an intermittent open in
the probe or the temperature controller
may be out of calibration. Test as
follows:
Push the "probe test" button all the way
down and turn the thermostat dial back
and forth past 350°F. If the indicator
light in the power switch turns off and on
within 10°F of that setting, the probe is
defective and must be replaced. If the
indicator light does not come on within
10°F, call for service, as the problem
could be in the temperature controller.
b) If the indicator light and heating
elements do not come on at all, but will
when the probe test button is pushed
and the thermostat dial is turned past
350°F, then the probe is bad and must
be replaced.
7.5 TEMPERATURE ADJUSTMENT:
An additional feature of the "Thermatron"
controller is a temperature fine-tune adjustment.
If the actual temperature of the cooking oil
varies from the reading on the controller dial, it
may be adjusted as much as
6
10°F by simply
turning the adjustment screw, located to the
right of the control dial clockwise to increase or
counterclockwise to decrease the temperature.
Do not attempt to turn this adjustment past
the stops or the controller will be damaged!
8. RECOMMENDED SPARE
PARTS
To insure minimum downtime of the fryer in
case the replacement of a part is required, it is
recommended that one each of the following
parts be kept in local stock:
Operating thermostat (if so equipped)
Temperature High-limit control
5 amp cartridge fuse