Vulcan-Hart VC6ES Service Procedures and Adjustments, Solid State Temperature Control Calibration

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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS

SERVICE PROCEDURES AND ADJUSTMENTS

WARNING: CERTAIN PROCEDURES IN THIS SECTION REQUIRE ELECTRICAL TEST OR MEASUREMENTS WHILE POWER IS APPLIED TO THE MACHINE. EXERCISE EXTREME CAUTION AT ALL TIMES. IF TEST POINTS ARE NOT EASILY ACCESSIBLE, DISCONNECT POWER, ATTACH TEST EQUIPMENT AND REAPPLY POWER TO TEST.

SOLID STATE TEMPERATURE

CONTROL CALIBRATION

1.Place a thermocouple in the geometric center of the oven cavity.

2.Set the power switch to ON.

3.Set the temperature control dial to 350 °F.

4.Allow the oven temperature to stabilize (normally 3 cycles).

5.Record the temperature at which the Heat lamp goes OFF and comes ON for at least two complete heating cycles.

6.Calculate the differential by subtracting the temperature indicated when the lamp goes out from the temperature indicated when the lamp comes on.

Differential ￿Heat lamp OFF Heat lamp ON Example: 360￿(lamp off) ￿340￿(lamp on) ￿20￿

A.The differential calculated should be less than 20 °F.

1)If the differential is 20 °F or less, the temperature control circuit is functioning properly.

a.Proceed to step 7.

2)If the differential is more than 20 °F:

a.Check the temperature probe as outlined under "TEMPERATURE PROBE TEST (SOLID STATE CONTROL)".

b.If the probe is functioning properly then temperature control is malfunctioning.

a)Install a replacement temperature control and check calibration.

7.Calculate the average temperature by adding the temperature indicated when the lamp goes out to the temperature indicated when the lamp comes on and dividing this answer by 2.

[Temp. (lamp off) ￿Temp. (lamp on)] ÷ 2 ￿Average Temp.

Example: 360￿￿340￿÷ 2 ￿350￿

A.If the average temperature is 10 °F or less, from the dial setting, the thermostat is properly calibrated.

B.If the average temperature is more than 10 °F from the dial setting, the thermostat calibration must be adjusted.

1)Loosen the temperature control knob set screw and remove the knob from the stem.

2)Loosen temperature control mounting screws only enough to rotate the control.

a.Place thumb and forefinger on the head of the mounting screws, apply pressure and slightly rotate the screw heads (body of control) in the slot. Rotate clockwise to increase temperature and counterclockwise to decrease.

b.Center the stem in the opening and re-tighten the temperature control mounting screws.

c.Replace knob and re-tighten set screw .

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F25105 (December 2001)

 

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Contents VC4ED Shown VC4E & VC6E SeriesTable of Contents Full Size Electric Convection Ovens General VC6ES VC6ED VC6EC SpecificationsVC4ES VC4ED VC4EC Covers and Panels Removal and Replacement of PartsLeft Side Panel Control Panel ComponentsRemovable Components Covers and PanelsComponent Panel Components Temperature Probe Solid State ControlHeating Elements Front AccessLeft Side Elements Shown Alternate AccessBlower and Motor Service Procedures and Adjustments Door SwitchOven Doors and Bearings Independent Doors Door WindowOven Doors Simultaneous Doors Assembly RemovalDisassembly Door Catch Roller Assembly Independent DoorsAssembly Removal Mechanical KX ThermostatHigh Limit Thermostat Lamp AssemblyInterior Lights LampCooling FAN Solid State Temperature Control Calibration Service Procedures and AdjustmentsMechanical KX Thermostat Calibration Temperature Probe Test Solid State Control Solid State Temperature Control TestTroubleshooting 208 240 480 Temp F OhmsAmps PER Voltage KW PER Element Ohms PER Lead Blower Adjustment Door Catch Roller Adjustment Independent Doors Door AdjustmentIntroduction Door Switch AdjustmentProcedure Operation Setup modeComputer Control Menu Display Parameter Data Alternating onProbe Test Solid State Relay TestComputer Control Operational Test Computer Control Temperature CalibrationKEY Code CalyHEY Restore Factory Settings Component Function Electrical OperationSSR1 & SSR2 1CON & 2CONComponent Location Mechanical Temperature ControlFull Size Electric Convection Ovens Electrical Operation Full Size Electric Convection Ovens Electrical Operation VC4EC/6EC Plug, Socket and Components Cook & Hold Standard Sequence of Operation VC4ED, VC6ED with Solid State Temperature ControlCook Cycle VC4ES, VC6ES with Mechanical KX ThermostatVC4EC, VC6EC Computer Control Timer Cycle, Cooking KX Thermostat or Solid State ControlCool Down Cycle KX Thermostat or Solid State Control Cool Down Cycle Temperature and Time Cycle CookingCook and Hold Cycle VC4ES, VC6ES with Mechanical KX Controls SchematicsVC4ES, VC6ES with Mechanical KX Controls VC4ED, VC6ED with Solid State Temperature Control VC4ED, VC6ED with Solid State Temperature Control Full Size Electric Convection Ovens Electrical Operation VC4EC, VC6EC Computer Control, 480V Roast & Hold Standard This page Purposely Left Blank VC4ES, VC6ES with Mechanical KX Control Wiring DiagramsFull Size Electric Convection Ovens Electrical Operation VC4ES, VC6ES with Mechanical KX Control Full Size Electric Convection Ovens Electrical Operation VC4ED, VC6ED with Solid State Temperature Control Full Size Electric Convection Ovens Electrical Operation VC4ED, VC6ED with Solid State Temperature Control Full Size Electric Convection Ovens Electrical Operation Full Size Electric Convection Ovens Electrical Operation Full Size Electric Convection Ovens Electrical Operation VC4EC, VC6EC Computer Control, 480V Roast & Hold Standard Full Size Electric Convection Ovens Electrical Operation ALL Models TroubleshootingFull Size Electric Convection Ovens Troubleshooting Control Operational Test Computer Control Models onlyComputer Control Error CodesCode & Problem Probable Cause Solution T E S Part Number Description VC4ES VC4ED VC4EC VC6ES VC6ED VC6EC Condensed Spare Parts List
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