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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 .......................................................................... 4 Lubricat
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FULL SIZE ELECTRIC CONVECTION OVENS VC4EC, VC6EC Computer Control, 208-240V (Roast & Hold Standard) ...................... 41 VC4EC, VC6EC Computer Control, 480V (Roast & Hold Standard) ......................... 42 Wiring Diagrams ................................................................... 44 VC4ES, VC6ES with Mechanical (KX) Control, 208-240V ................................. 44 VC4ES, VC6ES with Mechanical (KX) Control, 480V .................................... 46 VC4ED, VC6ED with Sol
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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 VC4ED 26.5" Solid State Independent 1-Hour Dial 5-Hour Dial N/
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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 WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED. 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 r
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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 WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDIC
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS COMPONENT PANEL COMPONENTS WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED. 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
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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,
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS LEFT SIDE ELEMENTS SHOWN 3. If the element is on the right side: A. Remove the top panel and pull back the 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 h
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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 mou
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS 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 and lift the window assembly out from the door frame. 4. Reverse procedure to install the replacement switch and check for proper adjustment as
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS 3. Remove the lower door seal strip to expose the OVEN DOORS mounting screws of the door assembly. (SIMULTANEOUS DOORS) 4. Remove the two (2) lower sill bolts by the lower door shaft and the four (4) counter-sunk screws from the lower sill. WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED. Assembly Removal 1. Remove the top
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS 5. Lift up on the door assembly and swing the DOOR CATCH ROLLER right side out then move the assembly to the ASSEMBLY left to clear the slots in the upper door sill. (INDEPENDENT DOORS) 6. Lay the door assembly on a flat cushioned surface for disassembly. 7. Reverse procedure to install door assembly WARNING: DISCONNECT THE ELECTRICAL and check for proper adjustment as outlined POWER TO THE MACHINE AT THE MAIN under "DOOR ADJU
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS NOTE: When installing probe guard, the probe should not extend beyond the guard. 4. Remove the thermostat bulb from the oven cavity 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, therefore the probe must be removed at an angle. 5. Reverse the procedure to install. NOTE: Remove the old RTV sealer from the cov
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FULL SIZE ELECTRIC CONVECTION OVEN - REMOVAL AND REPLACEMENT OF PARTS 3. Depress the retaining tabs and pull the socket out from the oven, far enough to disconnect the lead wires. 4. Remove the socket from the oven. 5. Attach the lead wires to the replacement socket. 6. Insert the socket into the hole in the oven and push until the socket is held in place by the retaining tabs. 4. Reverse the procedure to install the 7. Install the light bulb and lens. replacement fan and check for proper operat
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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. A. If the average temperature is 10 °F or SOLID STATE TEMPERATURE less, from the dial setting, the thermostat CONTROL CA
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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS d. Rotate the knob to the lowest 2) If the differential is more than 30 ( F, temperature setting then back to the thermostat is malfunctioning. 350°F. a. Install a replacement thermostat e. Repeat the average temperature and check calibration. calculation in step 7. 7. Calculate the average temperature by adding NOTE: Allow the oven to cycle the temperature indicated when the heat lamp goes out to the temperature indicated
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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS A. After the final adjustment is made and the A. If correct, proceed to step 7. average temperature is within tolerance, B. If incorrect, problem is not with the remove the knob and apply a non- temperature control. See permanent type sealer around the head of "TROUBLESHOOTING". the set screw. 7. Check relay voltages on the board: 10. If the above adjustment cannot be obtained: A. For 208-240VAC controls - check across A.
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FULL SIZE ELECTRIC CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS TEMPERATURE PROBE TEST HEATING ELEMENT TEST (SOLID STATE CONTROL) WARNING: THE FOLLOWING STEPS REQUIRE POWER TO BE APPLIED TO THE UNIT DURING WARNING: DISCONNECT THE ELECTRICAL THE TEST. USE EXTREME CAUTION AT ALL POWER TO THE MACHINE AT THE MAIN TIMES. CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING 1. Turn the power switch ON and set the oven SERVICED. temperature control to the highest settin
