Programming instructions

DECATHLON SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1-35
1.8.2 Improper Burner Function (cont.)
Burners lighting on the left side only may be caused by a trailing pilot problem (four- and five-tube
frypots) or improper burner manifold pressure.
Fluctuating flame intensity is normally caused by either improper or fluctuating incoming gas
pressure, but may also be the result of variations in the kitchen atmosphere. Verify incoming gas
pressure in the same way as for "popping,” discussed in the preceding paragraphs. Variations in the
kitchen atmosphere are usually caused by air conditioning and/or ventilation systems starting and
stopping during the day. As air conditioning/ventilation systems start and stop, the pressure in the
kitchen may change from positive or neutral to negative, or vice versa. Changes in airflow patterns
may affect flame intensity.
Flames "rolling" out of the fryer are usually an indication of negative pressure in the kitchen. Air is
being sucked out of the fryer enclosure and the flames are literally following the air. If negative
pressure is not the cause, check for high burner-manifold gas pressure in accordance with the
procedures in Section 1.4. An obstructed flue, which prevents the fryer from properly exhausting,
may also be the cause.
Excessively noisy burners, especially with flames visible above the flue opening, may indicate that
the burner gas pressure is too high, the tube diffusers are defective or burned out, or it may simply be
that the gas valve vent-tube is blocked (if applicable). If the gas pressure is correct, the tube
diffusers are intact and in good condition, and the vent-tube is unobstructed (if applicable), the gas
valve regulator is probably defective.
1.8.3 Improper Temperature Control
Temperature control, including the melt cycle, is a function of several interrelated components, each
of which must operate correctly. The principal component is the temperature probe. Depending
upon the specific configuration of the fryer, other components may include the interface board, the
computer/controller itself, and the ignition module.
Improper temperature control problems can be categorized into melt cycle problems and failure to
control at setpoint.
In fryers equipped with a Thermatron/optional backup operating-thermostat, the problem will be
with the thermostats themselves. Possible causes are that the thermostats are out of calibration or
defective. Refer to Section 1.6 for instructions on calibrating the thermostats.
In fryers equipped with computers, the problem may be with the temperature probe, the interface
board, or the computer. Refer to the troubleshooting guides in this chapter.