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SERVICE MANUAL
VC4E & VC6E
SERIES
FULL SIZE
ELECTRIC CONVECTION
OVENS
MODEL ML
VC4ES 126743
VC4ED 126744
VC4EC 126745
VC6ES 126746
VC4ED SHOWN
VC6ED 126747
VC6EC 126748
- NOTICE -
This Manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly qualified.
If you have attended a Vulcan Service School for this product, you
may be qualified to perform all the procedures described in this
manual.
This manual is not intended to be all en
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FULL SIZE ELECTRIC CONVECTION OVENS TABLE OF CONTENTS GENERAL ................................................................................ 4 Introduction ............................................................................ 4 Installation ............................................................................ 4 Operation ............................................................................. 4 Cleaning ........................................................................
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FULL SIZE ELECTRIC CONVECTION OVENS Computer Control Operational Test ........................................................ 27 ELECTRICAL OPERATION .................................................................. 29 Component Function ................................................................... 29 Component Location ................................................................... 30 Sequence of Operation .................................................................. 34 VC4ES,
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FULL SIZE ELECTRIC CONVECTION OVEN - GENERAL GENERAL INTRODUCTION Procedures in this manual will apply to all models unless specified. Pictures and illustrations can be of any model unless the picture or illustration needs to be model specific. Models FEATURES OPTIONS MODEL CAVITY TEMPERATURE DOORS COOK COOK COOK & DEPTH CONTROL (50/50) TIMER TIMER HOLD 4 1, 2 VC4ES 26.5" Mechanical (KX) Independent 1-Hour Dial 5-Hour Dial N/A 1, 3 26.5" Solid State Independent 1-Hour Dial 5-Hour Dial N/A VC4ED
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FULL SIZE ELECTRIC CONVECTION OVEN - GENERAL SPECIFICATIONS Electrical AMPERAGE - 3 PHASE/ 60HZ TOTAL RECOMMENDED 1 MODEL POWER PER LINE CIRCUIT 2 (KW) PROTECTION 208V 240V 480V 208V 240V 480V VC4ES VC4ED VC4EC 12.5 353315454020 VC6ES VC6ED VC6EC NOTES: 1. Amperage values in the table are nominal. Tolerance is +5/-10%. 2. Complied in accordance with National Electric Code, ANSI/NFPA 70, latest edition. AMPERAGE - 1 PHASE/ 60HZ TOTAL RECOMMENDED 1 MODEL POWER PER LINE CIRCUIT 2 (KW) PROTECTION
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS Top Front Cover 1. The top front cover is secured with four (4) screws, two on each side of cover. Remove these screws then remove the cover from the oven. NOTE: If the oven has a mechanical (KX type) thermostat, it must be removed from the control panel first, before removing the control panel. 2. Disconnect the temperature probe leads from the solid state temperature control
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS Left Side Panel 1. Remove the screws which secure the left side of the top front cover, bottom front cover and control panel. 2. Remove the seven screws securing the left side panel. 3. Pull the left side panel out at the bottom then down to remove. 4. Reverse the procedure to install. CONTROL PANEL COMPONENTS Removable Components 1. Remove the control panel as outlined under COVERS AND PANELS. 2. Remove the component being r
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS COMPONENT PANEL COMPONENTS Removable Components 1. Remove the right side panel as outlined under COVERS AND PANELS. NOTE: If right side panel is not accessible, this component can be serviced by removing the control panel as outlined under COVERS AND PANELS. 2. Disconnect the wire leads to the component being replaced. 3. Remove the component. 4. Reverse the procedure to install the replacement component and check oven for pro
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS A. Measure the current draw of the heating elements as outlined under HEATING ELEMENT TEST in SERVICE PROCEDURES AND ADJUSTMENTS. 4. From inside the oven cavity, remove the perforated panel from the same side of the element being replaced. 5. Remove probe by pushing it through the oven wall and into the control panel area. NOTE: The hole in the oven cavity wall does not line up straight with the oven cavity outer shell, ther
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS A. Remove the top panel and pull back the LEFT SIDE ELEMENTS SHOWN insulation to expose the element terminals. B. Remove the lead wires from the element being replaced. 4. From the same element, remove the two clamps holding the element vertical, the screw's securing mounting bracket at the top, and then remove the element. NOTE: The mounting bracket is sealed with RTV which may still hold the element after the screws are rem
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS 1) Reverse procedure to install and 10. Reconnect lead wires at the motor, replace adjust blower position as outlined conduit and junction box cover. under BLOWER ADJUSTMENT in NOTE: Check data plate on motor for wiring SERVICE PROCEDURES AND schematic. The motor must rotate clockwise when ADJUSTMENTS. viewed from the shaft end. B. Motor - perform step 3A and continue procedure. 4. Remove the nuts that secure the motor mountin
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS A. If replacing window on the left door, remove the handle from the front of the door then remove door seal from the inside edge of the door. 1) Lift out the inner door panel and window assembly. 2) If replacing window on the right door, remove the screws along the inside edge (if applicable) of the door then remove the inner door panel and window assembly. 4. Remove the screws securing the window "tabs" to the door bracket an
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS 8. Reverse procedure to install door assembly and check for proper adjustment as outlined under DOOR ADJUSTMENT and DOOR SWITCH ADJUSTMENT in SERVICE PROCEDURES AND ADJUSTMENTS. OVEN DOORS (SIMULTANEOUS DOORS) 3. Remove the lower door seal strip to expose the mounting screws of the door assembly. 4. Remove the two (2) lower sill bolts by the lower door shaft and the four (4) counter-sunk screws from the lower sill. Assembly R
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS NOTE: The door assembly is heavy and will drop ROLLER LATCH ASSEMBLY down once the last screw is removed. If removing (INDEPENDENT DOORS) door assembly with-out assistance, use caution. 5. Lift up on the door assembly and swing the right NOTE: For units with serial number starting with 48 side out then move the assembly to the left to made after 8/12/07 and serial number starting with clear the slots in the upper door sill. 54
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS NOTE: The hole in the oven cavity wall does not line up straight with the oven cavity outer shell, therefore the probe must be removed at an angle. 5. Reverse the procedure to install. 6. Adjust the thermostat as outlined under MECHANICAL (KX) THERMOSTAT CALIBRATION in SERVICE PROCEDURES AND ADJUSTMENTS. HIGH LIMIT THERMOSTAT 1. Take out racks from the oven. 2. Remove the high limit thermostat cover/mounting plate from inside
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS 8. Check for proper operation. NOTE: Remove the old RTV sealer from the cover and mating surfaces inside the oven cavity and apply COOLING FAN new high temperature RTV sealer before installing. 4. Reverse procedure to install. INTERIOR LIGHTS 1. Remove the right side panel as outlined under COVERS AND PANELS. NOTE: If right side panel is not accessible, this Lamp component can be serviced by removing the control 1. Remove the
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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS 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 and follow lockout / tagout procedures, attach test equipment and reapply power to test. B. If the average temperature is more than SOLID STATE TEMPERATURE 10 °F from the dial se
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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS 7. Calculate the average temperature by adding NOTE: Allow the oven to cycle at least two times between the temperature indicated when the heat lamp goes out to the temperature indicated when the adjustments before performing the calculation. heat lamp comes on and dividing this answer by 2. a) If the average temperature still differs more than 10 °F from the dial setting, adjust the thermostat calibration until the average
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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS A. Turn the power switch OFF. A. For 208-240VAC controls - check across terminals 7 & 10 for input to the internal relay and 6 & 10 for output from the internal relay. 1) If input voltage to the internal relay is correct, proceed to step 8. If input voltage to the internal relay is not present, problem is not with the temperature control. See B. Install a replacement thermostat and check TROUBLESHOOTING. calibration. 2) If
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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS TEMPERATURE PROBE TEST HEATING ELEMENT TEST (SOLID STATE CONTROL) The following steps require power to be applied to the unit during the test. Use extreme caution at all times. 1. Turn the power switch ON and set the oven temperature control to the highest setting. 2. Measure the voltage at the heating element terminals and verify it against the data plate voltage. NOTE: The temperature probe used in conjunction A. If volt
