Dean & Deluca SCFHDC - Manual (Page 35)

HIGH EFFICIENCY DECATHLON SERIES GAS FRYERS
CHAPTER 1: SERVICE PROCEDURES
1-30
1.8.2 Improper Burner Function (cont.)
If popping occurs only during peak operating hours, the problem may be incorrect or fluctuating gas
pressure. Verify that the incoming gas pressure (pressure to the gas valve) is in accordance with the
appropriate requirements listed in the Installation and Operation manual that came with the fryer,
and that the pressure remains constant throughout all hours of usage. Refer to Adjusting Burner
Manifold Pressure in Section 1.4 if burner manifold pressure is suspected of being incorrect.
If popping is consistent during all hours of operation, verify that the pilot is properly positioned
above the burner orifice and that the pilot pressure is correct. Correct pilot pressure is indicated by a
flame 1 to 1½" long. Also verify that igniter is properly adjusted (electrode tip 1/8" from pilot hood
corner). Refer to Section 1.5 for pilot adjustment procedure.
Clogged burners or burner orifices are also likely causes of delayed ignition. Clogged burners are
indicated by uneven flame or partial flame on the burner face. Clogged orifices are indicated by no
flame.
Another cause of popping is an insufficient air supply or drafts that are blowing the pilot flame away
from the burner. Check for "negative pressure" conditions in the kitchen area. If air is flowing into
the kitchen area, this indicates that more air is being exhausted than is being replenished and the
burners may be starved for air.
If the fryer’s gas and air supplies are okay, the problem most likely is with one of the electrical
components. Examine the ignition module for signs of melting, distortion, or discoloration due to
excessive heat build-up in the fryer. Also, examine the controller for the same conditions. This
condition usually indicates improper flue performance. A melted or distorted ignition module is
automatically suspect and should be replaced, but unless the condition causing excessive heat in the
fryer is corrected, the problem is likely to recur.
Next, ensure the ignition wire is tightly connected at both ends and examine it for obvious signs of
damage. Again, if damage is due to excessive heat in the fryer, that problem must also be corrected.
Check for proper operation by disconnecting the wire from the igniter, inserting the tip of a
screwdriver into the terminal, and holding it near the frame of the fryer as the power switch is placed
in the "ON" position. A strong, blue spark should be generated for at least 60 seconds.
DANGER
MAKE SURE YOU ARE HOLDING THE INSULATED HANDLE OF THE SCREWDRIVER
AND NOT THE BLADE. THE SPARKING CHARGE IS APPROXIMATELY 25,000
VOLTS.
Ensure the gap setting of the igniter is correct (electrode tip 1/8" from pilot hood corner).