Vulcan-Hart SG4D service manual Verification of Spark AT Ignitor, Door Switch Adjustment

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VERIFICATION OF SPARK AT IGNITOR

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

Shut off the gas before servicing the oven.

1.Remove the bottom front cover as outlined under Covers and Panels in Removal and Replacement of Parts.

2.Disconnect the high voltage ignition cable from the spark igniter.

Do not hold the wire with your hands for this test. The manual gas valve must be closed.

3.Clamp the ignition cable in a manner that will position the end of the cable 3/16" from the oven frame (bare metal surface). It is critical that the cable be held 3/16" away from the surface of the oven frame or sparking may not occur even though the sparking circuit is functioning properly.

The following steps require power to be applied to the unit during the test. Use extreme caution at all times.

4.Plug the oven in and set the temperature controller to the maximum setting.

5.Turn the power switch ON.

6.Sparking should occur after a 4 second delay and continue for 7 seconds. The cycle will repeat twice after a 15 second purge time. Arcing from the ignition cable to the oven frame should be observed.

DOOR SWITCH ADJUSTMENT

Disconnect the electrical power to the machine and follow lockout / tagout procedures.

1.Remove the top front cover as outlined under Covers and panels in Removal and Replacement of Parts.

2.Door operation:

A. The switch actuator is engaged by the switch lever when the right door is between 1" and 1 1/2" from being closed.

3.If adjustment is necessary, bend the switch actuator to obtain the proper setting.

4.Install the top front cover.

5.Apply power to the oven and check for proper operation.

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Contents SG4 & SG6 Series Full Size GAS Convection Ovens VULCAN-HART Table of Contents Table of Contents General Removal and Replacement of Parts Component LocationBottom Front Cover Covers and PanelsTop Front Cover Right Side PanelControl Panel Components SG4D/SG6D SG4C/SG6CComponent Panel Components Temperature Probe SG4C/SG6C Temperature Probe ShownGAS Burners GAS Orifice GAS Solenoid ValveIgnition Control Module Spark Igniter and Flame SenseBlower and Motor Oven Doors and Bearings Door Window Roller Latch Assembly Independent DoorsDoor Catch Roller Assembly Independent Doors Door Switch Interior Lights Lamp AssemblyHigh Limit Thermostat Fan Installation Tips Cooling FANTest Steps Service Procedures and AdjustmentsSolid State Temperature Controller Test SG4D/SG6D Solid State Temperature Control Calibration SG4D/SG6D Calibration StepsTemperature Probe Test SG4D/SG6D Temp F OhmsProbe Test Operation Setup ModeComputer Controller SG4C/SG6C Computer Control Calibration SG4C/SG6C Solid State Relay TestGAS Pressure Adjustment Door Switch Adjustment Verification of Spark AT IgnitorBlower Adjustment Flame Current MeasurementDoor Adjustment Door Strike Adjustment Independent DoorsDoor Catch Roller Adjustment Electrical Operation Component DescriptionFront View Plug, Socket and Components SG4D/SG6DPlug, Socket and Components SG4C/SG6C Control Panel Component PanelFront View Cook Cycle SG4D/SG6D with Solid State Temperature ControllerSequence of Operations Timer Cycle Cool Down Cycle Solid State Temperature ControllerSG4C/SG6C with Computer Controller Normal Cook CyclePage Temperature and Time Cycle Normal Cooking Roast and Hold CycleWiring Diagrams 426574 Rev. C Schematics ThermostatGAS Convection Oven SG4 with Watlow 734 Control Troubleshooting Symptoms Possible CausesComputer Control Models only Symptom Possible Causes Symptoms Possible CausesError Codes Probable Cause Solution Problem