Frymaster SCFD, FPD manual Gas Valve, Improper Burner Function

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DECATHLON SERIES GAS FRYERS

CHAPTER 1: SERVICE PROCEDURES

1.8.1 Ignition Failure (cont.)

The Gas Valve

If the problem is not in the 24 VAC circuit or pilot system, it is most likely in the gas valve. Before replacing the gas valve, refer to the troubleshooting guides in this chapter.

1.8.2 Improper Burner Function

In these instances, the burner ignites but exhibits abnormal characteristics, such as popping, incomplete lighting of the burner, fluctuating flame intensity, and flames “rolling” out of the fryer.

Popping indicates delayed ignition. In most cases, the main gas valve is opening, but the burner is not immediately lighting. When ignition does take place, excess gas ignites rapidly rather than smoothly.

The primary causes of popping are:

1.

incorrect or fluctuating gas pressure,

7.

heat damage to the controller or ignition module,

2.

misdirected or weak pilot flame,

8.

an out-of-adjustment ignitor or broken ignition wire,

3.

clogged burner orifices,

9.

a defective ignition module,

4.

clogged burner flame-transfer holes

10. missing or misaligned burner deflector targets, or

5.

clogged burners

11.

clogged vent tube (causing incorrect gas pressure).

6.

inadequate make-up air,

 

 

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 CE or Non-CE 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 ignitor is properly adjusted (electrode tip 1/8" from pilot hood corner). Refer to Section 1.5 for pilot adjustment procedure.

Clogged burners, burner orifices, and burner flame transfer holes (see page 1-27 for reference) 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. Clogged burner flame transfer holes prevent the outermost burners from lighting immediately with the middle burners (four- and five-tube frypots).

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.

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Contents CFD, SCFD, FPD Hour Service HotlinePage Computers FCC Table of Contents Finding Your WAY around the Dean Decathlon NON-CE Altitudes of 2000 feet or less Functional DescriptionCE only Altitudes of 2000 feet or less Electronic Ignition Configuration Pilot System ConfigurationControl Options Interface Boards Interface Board P/N Current Flow Through Interface Thermostats Accessing Fryers for ServicingRestraints Adjusting Burner Manifold Gas Pressure Cleaning the Gas Valve Vent Tube if applicableCalibrating the Thermatron Adjusting the Pilot FlameMain Pilot Trailing PilotBackup Operating Thermostat Optional Replacing the Computer Replacing Fryer ComponentsReplacing the Backup Thermostat if applicable Drains Replacing the Temperature Probe Computer-equipped FryersRemove burners to gain access to temperature probe Replacing the High-limit Thermostat Installing the New Temperature ProbeRemove screws arrows securing high-limit to fryer Decathlon Series GAS Fryers Service Procedures Switch Guard Replacing Rocker SwitchesDecathlon Series GAS Fryers Service Procedures Replacing the Frypot Replacing the Pilot AssemblyRemoving capping strip Removing flue cap Holding backup while unscrewing flare nut on oil-return line 19. a .5 drains Loosening burner bolts prior to burner removal Decathlon Series GAS Fryers Service Procedures Decathlon Series GAS Fryers Service Procedures Decathlon Series GAS Fryers Service Procedures Cutting frypot seal prior to frypot removal Ignition Failure Troubleshooting and Problem IsolationImproper Burner Function Gas ValveDecathlon Series GAS Fryers Service Procedures Improper Computer Function Improper Temperature ControlImproper Filtration Function Frypot Leakage Improper Basket Lift Function Bell-Crank Basket Lifts Improper Basket Lift Function Modular Basket Lifts Improper Basket Lift Function Troubleshooting GuidesNot possible Decathlon, Electronic Ignition, Current Configuration Wiring DiagramsDecathlon, Dual Vat Thermatron Decathlon Series GAS Fryers Service Procedures Transformer Box Decathlon Interface Board Dean Oil Return Wiring Filtration and Basket Lifts PBI OIL Return Micro SwitchOil Return, Left-hand, Normally Open Float Switch Basket Lift, with Timer CM4-S with Constant Pilot Chili’s Wiring Diagram Chili’s Wiring with SCF Filtration Decathlon Primary Components Decathlon Series GAS Fryers Parts ListDecathlon D20 Primary Components Decathlon Series GAS Fryers Parts ListDecathlon D50 Primary Components Decathlon 20 Primary Components826-1871 Decathlon D50 Primary Components 211-2787 826-2229 Decathlon D60 Primary ComponentsDecathlon D60 Primary Components 106-1703SP 823-3948SP Decathlon FPD65 Primary Components212-4570 823-3494SP Decathlon D80 Primary ComponentsSee Optional Components, Section Decathlon D80 Primary Components Control Panels Control Panel Options, Joiner Strips, and Accessories16 17 Optional Components and ControllersSee Control Panel Options, Section Not illustrated Transformers & Component Boxes Multi-batteried Decathlons 823-3242 PartTo Drain Drain Valve Components 823-3221Decathlon Series GAS Fryers Parts List Flush Oil Drain Line Decathlon Series GAS Fryers Parts List Component Oil Return Manifold Components SCFD, CFD, & FPD65 ModelsOil Return and Oil Flush Components D & FPD65 Models Oil Return and Oil Flush ComponentsOil Suction Start Fitting Oil Return and Oil Flush Components D & FPD65 Models2122 Microswitch Bracket Assembly, Oil Return Decathlon Series GAS Fryers Parts List Description UFF Filtration Components SCFD50 Series FryersUFF Filtration Components D60 and D80 Series Fryers 106-1220SP Filter Pan Scfd UFF Filtration Components SCFD60 and FPD65 Series FryersUFF Filtration Components SCFD80 Series Fryers 823-3796 Suff Filtration Components CFD50 Series Fryers 823-3774 Suff Filtration Components D60 and D80 Series Fryers823-5420 Suff Filtration Components CFD60 and CFD80 Series Fryers…2.10 Basket Lift Components D50, D60, and D80 Models Basket Lift Components D50, D60, and D80 Series Fryers Decathlon Series GAS Fryers Parts List Service Hotline
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