Dean D50 Installation, Operation & Maintenance Manual page 27

ü If equipped with "Thermatron" solid-
state controller, check probe for
correct operation.
ü The combination gas valve may be
defective; replace if necessary.
CAUTION
Do not attempt to turn the adjustment past the
stops or the controller will be damaged.
b. Main burner flames are small and appear
lazy; frying compound does not come up to
temperature quickly.
ü Check gas pressure at the pressure tap
of the gas valve.
standard
manometer. With burner in operation,
the pressure should be 10 mbar for
natural gas, and 27.5 mbar for
propane.
ü If not, remove the cover of pressure
regulator adjustment. Use screwdriver
to turn the adjusting screw clockwise
for increase gas pressure to burner, and
counter-clockwise
pressure. Replace cover and recheck
pressure. Reinstall pressure tap plug.
c. Signs of excessive temperature; frying
compound scorches and quickly becomes
discolored.
ü Check operating thermostat. May be
out of adjustment or calibration.
Recalibrate if necessary.
ü Check gas pressure as outlined above.
Use dial type or
water-type U-gauge
to decrease
ü Cooking compound of inferior quality
or has been used too long. Replace
cooking compound.
ü May be a short circuit in the system.
Check wiring.
d. Fryer will not reach the temperature setting
and/or runs erratically.
ü Incorrect location of sensor probe or
defective temperature sensor.
ü Operating thermostat or "Thermatron"
controller defective.
e. Fryer oil temperature cannot be controlled;
fryer runs at high limit temperature.
ü Defective operating thermostat or
"Thermatron" probe.
ü Call Service Technician.
7.4
RECOMMENDED SPARE PARTS:
High Temperature
Limit Control
Gas Safety Control
Valve
Thermocouple
Temperature Sensor
Probe
A more comprehensive parts listing can be
found in Chapter 9.
26
2687
807-2091
1149
14-0816 (for D50G)
18-0109 (for D60G)