Vulcan-Hart ML-044936, ML-044937, ML-044962, ML-044969 Troubleshooting, Problem, Probable Cause

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Griddle will not heat evenly.

TROUBLESHOOTING

Problem

Griddle will not heat evenly.

Product sticking to griddle.

Burner valves hard to turn.

Top burner will not light.

Probable Cause

Unit not level.

Wrong orifice.

Flue obstructed.

Gas-to-air ratio incorrect.

Burner ports obstructed.

Temperature too high.

Griddle not reseasoned after cleaning.

Excessive carbon buildup on griddle.

Valve lubricant dissipated.

Valve core/plug scored.

Dirt/debris in valve.

Valve stem or knob rubbing on front panel.

Wrong orifice.

Gas-to-air ratio incorrect.

Incorrect gas pressure.

Vent in pressure regulator blocked.

Pilot burner positioned incorrectly.

Burner ports obstructed.

Obstruction in venturi.

Make-up air/drafts directed toward burner.

Water or grease in burner.

Pilot flame too big or too small.

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Image 31
Contents SERVICE AND PARTS MANUAL IMPORTANT FOR YOUR SAFETYSIGNATURE SERIES VULCAN-HART COMPANY Snorkel Oven and/or Electric Ignition Oven with KX Thermostat TABLE OF CONTENTSService Notes INTRODUCTIONProduct Features and Descriptions Product Features and Descriptions Cont INSTALLATION REQUIREMENTS UNCRATING/SETUPGAS PRESSURE REQUIREMENTS GAS CONNECTIONSInstallation Requirements Cont Steps GAS PRESSURE CHECK PROCEDURESVENTILATION REQUIREMENTS DIAGRAM #4 PILOT ADJUSTMENTSDIAGRAM #1 DIAGRAM #3 DIAGRAM #2DIAGRAM #5 BURNER ADJUSTMENTSBATTERY INSTALLATION DIAGRAM #6 DIAGRAM #7 DIAGRAM #8 THERMOSTATS Standard Oven with FDTO Thermostat DIAGRAM #9DIAGRAM #10 CALIBRATION OF THERMOSTATSSnorkel Oven and/or Electric Ignition Oven with KX Thermostat Griddles with BJWA Thermostat BYPASS SCREW CALIBRATION SCREW DIAGRAM #11 DIAGRAM #12Spark System OVEN ELECTRIC IGNITION SYSTEMSSIGNATURE OVEN W/SPARK PILOT DIAGRAM #13SIGNATURE CONVECTION OVEN DIAGRAM #14W/ELECTRIC IGNITION SIGNATURE OVEN W/ELECTRIC IGNITION DIAGRAM #15BRASS VALVES DIAGRAM #16VALVE DIAGRAM #19 DOORS, DOOR SEALS, HINGES AND COUNTERWEIGHTSDIAGRAM #17 DIAGRAM #18ORIFICE, LP BURNERORIFICE, NAT All sizes are rated for sea levelCLEANING PROCEDURES Cleaning Tips Recommended Service Frequency SCHEDULED MAINTENANCEInspection Items Problem TROUBLESHOOTINGProbable Cause Griddle will not heat evenly Product sticking to griddle Problem Gas odor Charbroiler will not heat evenly Repeated component failure Stainless steel turning blue Stainless steel turning brown Standard Burners PARTS426745-1 Standard Burner PartsKNOB CONTROL Hot Tops/Fry Tops 426745-1 Hot Tops/Fry Tops PartsKNOB CONTROL French Top 426745-1 French Top PartsKNOB CONTROL Convection Oven Standard Oven788278A 788276PANEL Oven PartsControl System Convection Oven Control System Standard Oven S TYPE Control System Parts ListBody Parts/Shelves Risers 788382A Body Parts/Shelves Risers Parts List 788382A1 788382A2 788382A3Riser Kit Without Shelf P/N 788266A Riser Kit With Single Shelf P/N 788365A Double Deck Riser Kit Without Shelves P/N 788368A Double Deck Riser Kit With Shelves P/N 788368A FORM 31203 Rev. A March