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CAUTION: DO NOT ALLOW ANY CLEANING SOLUTION/WATER TO SPLASH INTO A VESSEL OF HOT COOKING
OIL AS IT WILL CONTAMINATE THE OIL AND MAY CAUSE THE OIL TO SPALTTER CAUSING SEVERE BURNS.
c.
THOROUGHLY clean the filter machine according to instructions provided in the cleaning section of this manual.
2.
WEEKLY
a.
BOIL OUT the fryer vat using Boil Out Compound according to procedures in the cleaning manual provided by the chemical supplier
b.
Perform steps 2) and 3) listed above under Daily Cleaning routines.
B MAINTENANCE - If the Model ZRT3-H gas fryer is equipped with an Ultrastat 11, 21, or 25 Cooking Computer NO maintenance is required
on the Temperature Sensing Probe. However, if the fryer is equipped with a Default-to-Manual-Restart (DTMR) Control, the Fenwal Temper-
ature Controller or Electronic Thermostat may need to be adjusted or calibrated according to the following procedure:
C. ELECTRONIC THERMOSTAT CALIBRATION - The Electronic Thermostat in all fryer configurations are equipped with a
Dial and Knob and should be checked and calibrated when necessary as follows:
ENSURE electrical power and, if applicable, gas to the fryer has been
1.
turned OFF.
2.
CAREFULLY drain sufficient shortening from the fryer to LOWER the
shortening about 4" (102 mm) beneath the Electronic Thermostat sensing
probe.
3.
After the sensing probe has COOLED, loop the bead of an ACCURATE
digital test thermometer temperature probe around the sensing element;
then connect the probe to the thermometer.
Replace shortening drained in step B and ENSURE it is level with the short-
4.
ening level mark on the rear of the vat; then turn the power and, if applicable,
gas to the fryer ON.
Set the KNOB of the Electronic Thermostat to the CENTER (300) of the dial
5.
and periodically STIR the shortening in a COUNTER-CLOCKWISE (CCW)
direction with a long handle skimmer to pull congealed shortening UPWARD
from the Cold Zone area.
When shortening has reached the set temperature and the RED indicator lamp on the fryer has turned OFF, allow the Electronic Thermo-
6.
stat to cycle ON and OFF about five (5) times to stablize the system.
7.
After the shortening temperature has stablized, record the temperature reading of the TEST THERMOMETER immediately after the
RED indicator lamp and the fryer turns OFF.
CAREFULLY loosen the set screw on the Electronic Thermostat KNOB without turning the thermostat potentiometer, set the thermostat knob
8.
pointer to the temperature recorded by the test thermometer; then tighten the set screw on the thermostat knob taking care not to turn the
thermostat's potentiometer.
9.
Repeat steps 1 and 2 above, remove the test thermometer temperature probe from the Electronic Thermostat sensing element; then repeat
step D to return the fryer to normal operation.
PREVENTIVE MAINTENANCE Minimal maintenance is required on Model ZRT#-H gas fryers because of its design and the materials used in
manufacture. However, some preventive maintenance and inspection must be performed periodically to prevent break downs which could cur-
tail food sales. Any preventive maintenance or inspection should be accomplished with CAUTION while the fryer is in operation since HOT
liquid shortening could cause severe burns. If service or repair is required, all gas and electric power MUST BE TURNED OFF PRIOR TO
performing that service or repair.
INSPECTION ITEM
Drain Valve & Shortening
Temperature Sensing Probes
PREVENTIVE MAINTENANCE SCHEDULE
Grease Filters
Return Levers
INSPECTION
PRIORITY
Clean grease filters in the exhaust
DAILY
hood each evening and allow them to
dry overnight.
Determine that all levers are securely
WEEKLY
attached and that they can be easily
opened and closed.
During Boil-Out of the fryer, inspect
WEEKLY
the temperature and high limit sens-
ing probes for any visual damage.
14
ELECTRONIC THERMOSTAT
INSPECTION
DESCRIPTION
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