Page 2 - TABLE OF CONTENTS
FULL SIZE GAS CONVECTION OVENS F24682 (Rev. B, October 2007) Page 2 of 68 TABLE OF CONTENTS GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4 Introduction . . . . . . . . . . . . ....
Page 4 - GENERAL
FULL SIZE GAS CONVECTION OVEN - GENERAL F24682 (Rev. B, October 2007) Page 4 of 68 GENERAL INTRODUCTION Procedures in this manual will apply to all models unless specified. Pictures and illustrations can be of any modelunless the picture or illustration needs to be model specific. Models MODEL FEATU...
Page 5 - REMOVAL AND REPLACEMENT OF PARTS; COVERS AND PANELS
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 5 of 68 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. Removethese screws then remove the cover f...
Page 6 - CONTROL PANEL
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 6 of 68 CONTROL PANEL COMPONENTS Removable Components Procedure 1. Remove the control panel as outlined underCOVERS AND PANELS. 2. Remove the component being replaced. 3. Reverse the procedure to ins...
Page 7 - COMPONENT PANEL
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 7 of 68 COMPONENT PANEL COMPONENTS Removable Components Procedure 1. Remove the right side panel as outlined underCOVERS AND PANELS. NOTE: If right side panel is not accessible, this component can be...
Page 9 - GAS ORIFICE; GAS SOLENOID VALVE
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 9 of 68 6. Reverse procedure to install the replacementburner. NOTE: Ensure that burner positioning bracket (U shaped end) is inserted into slot at the rear of theburner chamber. 7. Check for proper ...
Page 10 - IGNITION CONTROL MODULE; SPARK IGNITER AND
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 10 of 68 4. Loosen the bolts securing the valve and bracketassembly then remove the screws securing thevalve to the bracket. 5. Reverse the procedure to install thereplacement gas valve. NOTE: Clean ...
Page 11 - BLOWER AND MOTOR
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 11 of 68 3. Reverse the procedure to install the assemblyand check for proper operation. NOTE: Check to ensure the spark gap distance is approximately 1/8". If the gap appears to beexcessive or p...
Page 12 - OVEN DOORS AND BEARINGS
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 12 of 68 6. Remove the nuts that secure the motormounting plate to the rear wall. Place a piece of cardboard on the bottom of the ovencavity to protect its surface from any damage duringmotor assembl...
Page 13 - OVEN DOORS
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 13 of 68 2. Remove the door switch lever. 3. Remove the lower door seal strip to expose themounting screws of the door assembly. 4. Remove the two (2) lower sill bolts by the lowerdoor shaft and the ...
Page 14 - ROLLER LATCH ASSEMBLY
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 14 of 68 NOTE: The door assembly is heavy and will drop down once the last screw is removed. If removingdoor assembly with-out assistance, the ignitioncable, flame sense lead and gas manifold shoulda...
Page 15 - DOOR CATCH BALL ASSEMBLY; DOOR WINDOW
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 15 of 68 DOOR CATCH BALL ASSEMBLY (INDEPENDENT DOORS) NOTE: For units with serial number starting with 48 made before 8/13/07 and serial number starting with54 made before 8/27/07. 1. Remove the top ...
Page 17 - INTERIOR LIGHTS
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 17 of 68 3. Disconnect lead wires from high limit thermostatthen remove high limit thermostat fromcover/mounting plate. NOTE: Remove the old RTV from the cover and mating surfaces inside the oven cav...
Page 18 - COOLING FAN
FULL SIZE GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS F24682 (Rev. B, October 2007) Page 18 of 68 COOLING FAN 1. Remove the right side panel as outlined underCOVERS AND PANELS. NOTE: If right side panel is not accessible, this component can be serviced by removing the controlpanel as out...
Page 19 - SERVICE PROCEDURES AND ADJUSTMENTS; SOLID STATE TEMPERATURE
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 19 of 68 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. ...
Page 20 - MECHANICAL THERMOSTAT
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 20 of 68 MECHANICAL THERMOSTAT CALIBRATION (VC4GS/6GS) 1. Place a thermocouple in the geometric center ofthe oven cavity. 2. Set the ON-OFF-COOL DOWN switch to ON. 3. Set the thermostat dial to 350...
Page 21 - TEMPERATURE PROBE TEST
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 21 of 68 4. Check machine data plate for correct voltage tooven. Refer to diagram below for properterminal locations and voltages before checkingthe control. Use the correct terminals for thecorres...
Page 22 - GAS PRESSURE ADJUSTMENT
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 22 of 68 5. Reverse procedure to install. TEMP (°F) OHMS* TEMP (°F) OHMS* 77 90000 360 822 240 4077 380 656 260 3016 400 529 280 2266 425 424 300 1726 450 334 320 1332 475 266 340 1041 (*) Resistan...
Page 23 - DOOR SWITCH ADJUSTMENT
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 23 of 68 VERIFICATION OF SPARK AT IGNITOR Shut off the gas before servicing the unit. 1. Remove the bottom front cover as outlinedunder COVERS AND PANELS in REMOVALAND REPLACEMENT OF PARTS. 2. Disc...
Page 24 - BLOWER ADJUSTMENT
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 24 of 68 BLOWER ADJUSTMENT Shut off the gas before servicing the unit. 1. Remove the blower motor and mounting assembly by following steps 1 through 7 as outlined under BLOWERAND MOTOR in REMOVAL A...
Page 25 - DOOR ADJUSTMENT; DOOR STRIKE ADJUSTMENT
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 25 of 68 DOOR ADJUSTMENT 1. Check the doors to make sure they have anequal gap between them and that the verticaledge of the door is parallel to the vertical doorseal. If the doors are not position...
Page 27 - DOOR CHAIN ADJUSTMENT
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 27 of 68 A. Adjust catch ball tension as follows: 1) Turn set screw inside the catchassembly housing clockwise toincrease tension on catch ball andcounterclockwise to decrease tensionon catch ball....
Page 28 - COMPUTER CONTROL
FULL SIZE GAS CONVECTION OVENS - SERVICE PROCEDURES AND ADJUSTMENTS F24682 (Rev. B, October 2007) Page 28 of 68 B. If doors operate properly, continue withprocedure. 7. Install the lower front cover. COMPUTER CONTROL (VC4GC/VC6GC) Operation Refer to the Instructions Manual for specificoperating inst...
Page 30 - ELECTRICAL OPERATION; COMPONENT FUNCTION
FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION F24682 (Rev. B, October 2007) Page 30 of 68 ELECTRICAL OPERATION COMPONENT FUNCTION Power Switch (S1) . . . . . . . . . . . . . Determines the mode of operation; ON, OFF, or COOL DOWN. Oven Light Switch (S2) . . . . . . . . . Controls the oven ca...
Page 32 - COMPONENT LOCATION
FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION F24682 (Rev. B, October 2007) Page 32 of 68 COMPONENT LOCATION
Page 37 - SEQUENCE OF OPERATION
FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION F24682 (Rev. B, October 2007) Page 37 of 68 SEQUENCE OF OPERATION VC4GS, VC6GS With Roast & Hold Option(Mechanical KX Thermostat) Schematic diagram 5304 will be used to explain theelectrical sequence of operation for both the NormalROAST cycl...
Page 50 - SCHEMATICS
FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION F24682 (Rev. B, October 2007) Page 50 of 68 SCHEMATICS VC4GS, VC6GS Mechanical (KX) Controls
Page 56 - WIRING DIAGRAMS
FULL SIZE GAS CONVECTION OVENS - ELECTRICAL OPERATION F24682 (Rev. B, October 2007) Page 56 of 68 WIRING DIAGRAMS VC4GS, VC6GS Mechanical (KX) Controls
Page 66 - TROUBLESHOOTING; ALL MODELS; SYMPTOMS
FULL SIZE GAS CONVECTION OVENS - TROUBLESHOOTING F24682 (Rev. B, October 2007) Page 66 of 68 TROUBLESHOOTING 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 accessib...
Page 67 - COMPUTER CONTROL MODELS ONLY; SYMPTOM
FULL SIZE GAS CONVECTION OVENS - TROUBLESHOOTING F24682 (Rev. B, October 2007) Page 67 of 68 SYMPTOMS POSSIBLE CAUSES Normal (Roast) mode OK, no Hold mode.(Roast & Hold models only). 1. Roast and Hold switch (S3) malfunction. 2. R2 hold relay malfunction. 3. Roast & Hold timer malfunction. 4...