Vulcan VC4GD Service Manual
SERVICE MANUAL
VC4G & VC6G SERIES FULL SIZE
CONVECTION OVENS
VC4GS ML-126610
VC4GD ML-126611
VC4GC ML-136494
VC6GS ML-126612
VC6GD ML-126613
VC6GC ML-136495
- NOTICE -
This Manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly
qualified.
This manual is not intended to be all encompassing. If you have
not attended a Vulcan Service School for this product, you should
read, in its entirety, the repair procedure you wish to perform to
determine if you have the necessary tools, instruments and skills
required to perform the procedure. Procedures for which you do
not have the necessary tools, instruments and skills should be
performed by a trained Vulcan Service Technician.
The reproduction, transfer, sale or other use of this Manual,
without the express written consent of Vulcan, is prohibited.
This manual has been provided to you by ITW Food Equipment
Group LLC ("ITW FEG") without charge and remains the property
of ITW FEG, and by accepting this manual you agree that you will
return it to ITW FEG promptly upon its request for such return at
any time in the future.
A product of Vulcan-Hart 3600 North Point Blvd Baltimore, MD 21222
F24682 Rev. C (0315)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS
TABLE OF CONTENTS
SERVICE UPDATES ....................................................................................... 4
SERVICE UPDATES - VC4G / VC6G ................................................................... 4
GENERAL .................................................................................................. 5
INTRODUCTION ....................................................................................... 5
INSTALLATION ........................................................................................ 5
OPERATION ........................................................................................... 5
CLEANING ............................................................................................. 5
LUBRICATION ......................................................................................... 5
SPECIFICATIONS ...................................................................................... 5
TOOLS ................................................................................................. 6
REMOVAL AND REPLACEMENT OF PARTS ............................................................... 7
COVERS AND PANELS ................................................................................ 7
TOP FRONT COVER ............................................................................... 7
BOTTOM FRONT COVER .......................................................................... 7
CONTROL PANEL ................................................................................. 7
RIGHT SIDE PANEL ................................................................................ 7
CONTROL PANEL COMPONENTS ..................................................................... 8
COMPONENT PANEL COMPONENTS ................................................................. 9
TEMPERATURE PROBE (VC4GD/6GD) ............................................................... 10
GAS BURNER ........................................................................................ 11
GAS ORIFICE ......................................................................................... 12
GAS SOLENOID VALVE .............................................................................. 12
IGNITION CONTROL MODULE ....................................................................... 14
SPARK IGNITER AND FLAME SENSE ................................................................ 15
BLOWER AND MOTOR ............................................................................... 15
OVEN DOORS (SIMULTANEOUS DOORS) ........................................................... 17
ASSEMBLY REMOVAL ........................................................................... 17
DISASSEMBLY ................................................................................... 18
OVEN DOORS AND BEARINGS (INDEPENDENT DOORS) ............................................ 18
DOOR CATCH BALL ASSEMBLY (INDEPENDENT DOORS) ........................................... 19
ROLLER LATCH ASSEMBLY (INDEPENDENT DOORS) ............................................... 19
DOOR WINDOW ...................................................................................... 19
DOOR SWITCH ....................................................................................... 20
MECHANICAL KX THERMOSTAT (VC4GS/6GS) ...................................................... 21
HIGH LIMIT THERMOSTAT ........................................................................... 21
INTERIOR LIGHTS .................................................................................... 22
COOLING FAN ........................................................................................ 22
SERVICE PROCEDURES AND ADJUSTMENTS ........................................................... 24
SOLID STATE TEMPERATURE CONTROL CALIBRATION (VC4GD/6GD) ............................. 24
MECHANICAL THERMOSTAT CALIBRATION (VC4GS/6GS) .......................................... 25
SOLID STATE TEMPERATURE CONTROL TEST (VC4GD/6GD) ...................................... 26
TEMPERATURE PROBE TEST (VC4GD/6GD) ......................................................... 27
GAS PRESSURE ADJUSTMENT (UNITS UP TO FEBRUARY 2015) ................................... 28
GAS VALVE PRESSURE CHECK (UNITS AFTER FEBRUARY 2015) .................................. 29
VERIFICATION OF SPARK AT IGNITOR .............................................................. 30
DOOR SWITCH ADJUSTMENT ....................................................................... 31
BLOWER ADJUSTMENT .............................................................................. 31
DOOR ADJUSTMENT ................................................................................. 31
DOOR STRIKE ADJUSTMENT (INDEPENDENT DOORS) ............................................. 32
DOOR CATCH BALL ADJUSTMENT (INDEPENDENT DOORS) ........................................ 33
DOOR CHAIN ADJUSTMENT (SIMULTANEOUS DOORS) ............................................. 34
INTRODUCTION .................................................................................. 34
PROCEDURE ..................................................................................... 34
COMPUTER CONTROL (VC4GC/VC6GC) ............................................................. 35
F24682 Rev. C (0315) Page 2 of 74
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS
OPERATION ...................................................................................... 35
SETUP MODE .................................................................................... 35
PROBE TEST ..................................................................................... 35
SOLID STATE RELAY TEST ...................................................................... 35
COMPUTER CONTROL CALIBRATION (VC4GC/VC6GC) ............................................. 35
ELECTRICAL OPERATION ................................................................................ 37
COMPONENT FUNCTION ............................................................................ 37
COMPONENT LOCATION ............................................................................. 38
SEQUENCE OF OPERATION ......................................................................... 43
VC4GS, VC6GS WITH ROAST & HOLD OPTION (MECHANICAL KX THERMOSTAT) .............. 43
VC4GD, VC6GD WITH ROAST & HOLD OPTION (SOLID STATE
TEMPERATURE CONTROL) .................................................................. 47
VC4GC, VC6GC (ROAST & HOLD STANDARD ON COMPUTER MODEL) ......................... 53
COOL DOWN CYCLE (COMPUTER CONTROL MODEL) .......................................... 55
SCHEMATICS ............................................................................................ 56
VC4GS, VC6GS MECHANICAL (KX) CONTROLS ..................................................... 56
VC4GS, VC6GS MECHANICAL (KX) CONTROLS, ROAST & HOLD OPTION ........................... 57
VC4GD, VC6GD SOLID STATE TEMPERATURE CONTROL .......................................... 58
VC4GD, VC6GD SOLID STATE TEMPERATURE CONTROL, ROAST & HOLD OPTION ................ 59
VC4GC, VC6GC COMPUTER CONTROL (ROAST & HOLD STANDARD) .............................. 60
WIRING DIAGRAMS ...................................................................................... 61
VC4GS, VC6GS MECHANICAL (KX) CONTROLS ..................................................... 61
VC4GS, VC6GS MECHANICAL (KX) CONTROLS, ROAST & HOLD OPTION ........................... 63
VC4GD, VC6GD SOLID STATE TEMPERATURE CONTROL .......................................... 65
VC4GD, VC6GD SOLID STATE TEMPERATURE CONTROL, ROAST & HOLD OPTION ................ 67
VC4GC, VC6GC COMPUTER CONTROL (ROAST & HOLD STANDARD) .............................. 69
TROUBLESHOOTING ..................................................................................... 71
ALL MODELS ......................................................................................... 71
COMPUTER CONTROL MODELS ONLY .............................................................. 72
ERROR CODES .................................................................................. 73
© VULCAN 2015
Page 3 of 74 F24682 Rev. C (0315)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - SERVICE UPDATES
SERVICE UPDATES
SERVICE UPDATES - VC4G / VC6G
March 2015
Updated Photos Added to the Following Data
Modules
• GAS BURNER
• GAS ORIFICE
• GAS SOLENOID VALVE
• ROLLER LATCH ASSEMBLY (INDEPENDENT
DOORS)
• HIGH LIMIT THERMOSTAT
• GAS PRESSURE ADJUSTMENT (units up to
February 2015)
Added New Data Module
• GAS VALVE PRESSURE CHECK (units after
February 2015)
VC4GC AND VC6GC Serial Number Breaks
• SPECIFICATIONS
Updated Data Module
• SOLID STATE TEMPERATURE CONTROL
CALIBRATION (VC4GD/6GD)
F24682 Rev. C (0315) Page 4 of 74
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - 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
COOK
MODEL
VC4GS 26.5" Mechanical (KX)
VC6GS 30.5" Mechanical (KX)
VC4GD 26.5" Solid State
VC6GD 30.5" Solid State
VC4GC 26.5" Computer
VC6GC 30.5" Computer
1
Simultaneous doors are optional (with or w/o window).
2
Stainless steel doors w/o window (standard).
3
Stainless steel doors with window (standard).
CAVITY
DEPTH
TEMPERTURE
CONTROL
DOORS
(50/50)
Independent 1
Independent 1
Independent 1
Independent 1
Independent 1
Independent 1
COOK
TIMER
2
1-Hour Dial 5-Hour Dial Optional Optional
2
1-Hour Dial 5-Hour Dial Optional Optional
3
1-Hour Dial 5-Hour Dial Optional Optional
3
1-Hour Dial 5-Hour Dial Optional Optional
24-Hour
3
Digital
24-Hour
3
Digital
TIMER
OR
HOLD
TIMER
Built in Built in Optional
Built in Built in Optional
COOK
BLOWER
&
208/240/60/1
HOLD
INSTALLATION
Refer to the Instructions Manual for detailed
installation instructions on single or stacked ovens.
OPERATION
Refer to the Instructions Manual for specific operating
instructions.
CLEANING
Refer to the Instructions Manual for specific cleaning
instructions.
Page 5 of 74 F24682 Rev. C (0315)
LUBRICATION
• Cavity blower motor has sealed bearings and
requires no additional lubrication.
• Huskey™ TF-1000 grease or equivalent high
temperature Teflon grease.
SPECIFICATIONS
Electrical
Voltage - 120/60/1
Amps - 8.0 Amps
Input BTU Rating
Natural Gas - 44,000 BTU input at 3.5 in. W.C.
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - GENERAL
Units after Serial Number Break (VC4GD 481835388,
VC6GD 481835406, VC4GD 541077665) Natural
Gas - 50,000 BTU input at 5.0 in. W.C.
Propane Gas - 44,000 BTU input at 10.0 in. W.C.
Units after Serial Number Break (VC4GD 481835394
& 541077965, VC6GD 481835429) Propane Gas 50,000 BTU input at 10.0 in. W.C.
Gas Line Pressures
Natural - Recommend (in. W.C.) 7.0, Min 5.0
Natural - Recommend (in W.C.) 8.0, Min 6.0 for Units
after Serial Number Break (VC4GD 481835388,
VC6GD 481835406, VC4GD 541077665)
Propane - Recommend (in. W.C.) 11.0, Min 11.0 (All
Propane Units)
Maximum 14.0 in. W.C. (Nat. or Prop.)
TOOLS
Standard
• Standard set of hand tools
• VOM with ability to measure micro amp current
VOM with minimum of NFPA-70E CAT III 600V,
UL/CSA/TUV listed. Sensitivity of at least 20,000
ohms per volt. Meter leads must also be rated at
CAT III 600V.
• Gear Puller to remove blower
Special
• Temperature tester (thermocouple type)
• Manometer
F24682 Rev. C (0315) Page 6 of 74
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
REMOVAL AND REPLACEMENT OF PARTS
COVERS AND PANELS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
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.
Fig. 1
2. Reverse the procedure to install.
Bottom Front Cover
1. The bottom front cover is secured with four (4)
screws, two on each side of cover. Remove these
screws then remove the cover from the oven.
Fig. 3
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.
3. Unplug the wire harness connector to the control
panel components.
4. Reverse the procedure to install.
Right Side Panel
1. Remove the screws which secure the right side
of the top front cover, bottom front cover and
control panel.
2. Remove the remaining six screws securing the
right side panel.
Fig. 2
2. Reverse the procedure to install.
Control Panel
1. Remove three (3) screws on the right side which
secure the control panel then pull the panel away
from the oven.
Page 7 of 74 F24682 Rev. C (0315)
Fig. 4
3. Pull the right side panel out at the bottom then
down to remove.
4. Reverse the procedure to install.
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
CONTROL PANEL COMPONENTS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Removable Components Procedure
1. Remove the Control Panel.
2. Remove the component being replaced.
3. Reverse the procedure to install the replacement
component, then check oven for proper
operation.
Fig. 5
Fig. 6
F24682 Rev. C (0315) Page 8 of 74
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
Fig. 7
COMPONENT PANEL
COMPONENTS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Removable Components Procedure
1. Remove the
NOTE: If right side panel is not accessible, this
component can be serviced by removing the Control
Panel.
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 proper operation.
Right Side Panel.
Fig. 8
Page 9 of 74 F24682 Rev. C (0315)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
Fig. 9
Fig. 10
TEMPERATURE PROBE (VC4GD/
6GD)
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the
NOTE: If right side panel is not accessible, this
component can be serviced by removing the Control
Panel.
2. Disconnect the probe leads from the solid state
temperature control.
3. Remove the racks and right rack support.
4. Remove the probe guard.
Right Side Panel.
F24682 Rev. C (0315) Page 10 of 74
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
Fig. 11
5. Remove probe by pushing it through the oven
wall and into the control panel area.
Fig. 13
3. Remove the bolts securing the gas manifold to
the oven and place the manifold to the side.
Fig. 12
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.
6. Reverse the procedure to install the replacement
probe.
7. Adjust the temperature control as outlined under
SOLID STATE TEMPERATURE CONTROL
CALIBRATION (VC4GD/6GD).
GAS BURNER
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
1. Remove the BOTTOM FRONT COVER.
2. Disconnect the ignition cable and the flame
sense lead wire.
Fig. 14
4. Remove the screws securing the burner cover
then lift out.
Fig. 15
5. Grasp the burner and lift out.
Fig. 16
Page 11 of 74 F24682 Rev. C (0315)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
6. Reverse procedure to install the replacement
burner.
NOTE: Ensure that burner positioning bracket (U
shaped end) is inserted into slot at the rear of the
burner chamber.
NOTE: When installing current production burner
covers:
• Lay cover flat over burner with openings
aligned behind ignitor.
• Push burner into unit and flip cover 90° up
and align mounting holes.
4. Reverse procedure to install and check for proper
operation.
Fig. 19
GAS SOLENOID VALVE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
CURRENT PRODUCTION UNIT SHOWN
7. Check for proper operation.
GAS ORIFICE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
1. Remove the Bottom Front Cover.
2. Remove the bolts securing the gas manifold to
the oven and place the manifold to the side.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
1. Remove the CONTROL PANEL and the RIGHT
SIDE PANEL.
NOTE: if right side panel is not accessible, this
component can be serviced by removing the
CONTROL PANEL.
2. Disconnect the lead wires.
3. Disconnect the compression fittings to the valve.
Fig. 18
3. Remove the gas orifice from the spud on the
manifold and replace with the correct orifice for
the given altitude.
F24682 Rev. C (0315) Page 12 of 74
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
CURRENT PRODUCTION SHOWN (After February
FIRST GENERATION UNIT SHOWN (Before April
2005)
4. Loosen the bolts securing the valve and bracket
assembly then remove the screws securing the
valve to the bracket.
2015)
SECOND GENERATION UNIT SHOWN (After April
2005 thru February 2015)
Page 13 of 74 F24682 Rev. C (0315)
FIRST GENERATION UNIT SHOWN (Before April
2005)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
6. Verify gas pressure as outlined under GAS
PRESSURE ADJUSTMENT (for units before
February 2015) and GAS VALVE PRESSURE
CHECK (for units after February 2015) and check
for proper operation.
IGNITION CONTROL MODULE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
SECOND GENERATION UNIT SHOWN (After April
2005 thru February 2015)
CURRENT PRODUCTION SHOWN (After February
2015)
1. Remove the
NOTE: If right side panel is not accessible, this
component can be serviced by removing the Control
Panel.
2. Loosen the screws securing the mounting
bracket to the component panel and remove the
bracket.
Right Side Panel.
5. Reverse the procedure to install the replacement
gas valve.
NOTE: Clean the pipe threads and apply pipe joint
compound to threads. Any pipe joint compound used,
must be resistant to the action of propane gases.
All gas joints disturbed during
servicing must be checked for leaks. Check with a
soap and water solution (bubbles). Do not use an open
flame.
F24682 Rev. C (0315) Page 14 of 74
3. Disconnect the lead wires and igniter cable from
Fig. 26
the ignition module board.
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
NOTE: Check to ensure the spark gap distance is
approximately 1/8". If the gap appears to be excessive
or poor sparking is occurring then adjust.
PREVOUS PRODUCTION SHOWN
Fig. 27
4. Remove the ignition module board from the
mounting bracket.
5. Reverse the procedure to install the replacement
ignition module board.
CURRENT PRODUCTION SHOWN
SPARK IGNITER AND FLAME
SENSE
BLOWER AND MOTOR
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
1. Remove the gas burner as outlined under GAS
BURNER.
2. Remove the screws securing the ignitor and
flame sense to burner then remove the
assembly.
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
1. Take out the racks and rack supports.
2. Remove screws securing the “snorkel” and
remove the snorkel.
Fig. 28
3. Reverse the procedure to install the assembly
and check for proper operation.
Page 15 of 74 F24682 Rev. C (0315)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
Fig. 31
3. Remove screws securing baffle panel and
remove the panel.
Fig. 32
4. If replacing:
A. Blower Only - Loosen set screws on blower
hub and using a bearing puller, remove
blower from motor shaft.
1) Reverse procedure to install and adjust
blower position as outlined under
BLOWER ADJUSTMENT.
B. Motor - perform step 4A and continue
procedure.
5. Remove the screws securing the air baffle to the
rear wall at the lower right hand corner.
Fig. 33
6. Remove the nuts that secure the motor mounting
plate to the rear wall.
Fig. 34
7. Place a piece of cardboard on the bottom of the
oven cavity to protect its surface from any
damage during motor assembly removal.
8. Pull the motor assembly into the oven cavity and
place it on the cardboard.
9. Remove the junction box cover from the motor,
disconnect lead wires and remove the conduit.
10. Remove motor mounting bolts and flat washers
then lift the motor from the mounting plate.
11. Position the replacement motor on the motor
mounting plate and install mounting bolts and
washers. Hand tighten mounting bolts only.
F24682 Rev. C (0315) Page 16 of 74
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
12. Reconnect lead wires at the motor, replace
conduit and junction box cover.
NOTE: Check data plate on motor for wiring
schematic. The motor must rotate clockwise when
viewed from the shaft end.
OVEN DOORS (SIMULTANEOUS
DOORS)
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Assembly Removal
1. Remove the
Cover.
2. Remove the door switch lever.
Top Front Cover and Bottom Front
Fig. 35
13. Slide blower onto motor shaft until hub is flush
with end of shaft then tighten set screws.
14. Adjust motor position until blower is parallel to
motor mounting plate as outlined under
BLOWER ADJUSTMENT.
15. Position motor mounting plate on the rear wall
and secure with nuts and washers.
16. Replace the baffle panel and “snorkel”.
17. Replace the air baffle on the rear wall at the lower
right hand corner.
18. Remove cardboard from the bottom of the oven
cavity.
19. Install rack guides and racks.
20. Check oven for proper operation.
Fig. 36
3. Remove the top bearing retainers and top
bearings.
Fig. 37
4. Remove the lower door seal strip to expose the
mounting screws of the door assembly.
A. Remove the two (2) lower sill bolts by the
lower door shaft and the four (4) countersunk screws from the lower sill.
Fig. 38
Page 17 of 74 F24682 Rev. C (0315)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
NOTE: The door assembly is heavy and will drop
down once the last screw is removed. If removing door
assembly with-out assistance, use caution.
5. Lift up on the door assembly and swing the right
side out then move the assembly to the left to
clear the slots in the upper door sill.
6. Lay the door assembly on a flat cushioned
surface for disassembly.
7. Reverse procedure to install door assembly and
check for proper adjustment as outlined under
DOOR ADJUSTMENT, DOOR CHAIN
ADJUSTMENT (SIMULTANEOUS DOORS) and
DOOR SWITCH ADJUSTMENT.
Disassembly
1. Remove the door assembly as outlined in
"ASSEMBLY REMOVAL".
2. Remove the door chain by loosening one of the
turnbuckles.
3. Loosen the set screw on the sprocket of door
being replaced.
4. Drive out the Spirol pin from the sprocket of door
being replaced.
5. Remove the door from lower sill bearings and
sprocket.
OVEN DOORS AND BEARINGS
(INDEPENDENT DOORS)
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the
Cover.
2. Remove the door switch lever.
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.
Top Front Cover and Bottom Front
Fig. 40
NOTE: The door assembly is heavy and will drop
down once the last screw is removed. If removing door
assembly with-out assistance, the ignition cable,
flame sense lead and gas manifold should also be
removed to avoid damage to these components.
5. Tilt the top of the door slightly forward and lift the
Fig. 39
A. Door assembly parts are now accessible for
inspection and/or replacement if necessary.
6. Reverse procedure to re-assemble the door
assembly parts and check for proper adjustment
as outlined under DOOR CHAIN ADJUSTMENT
(SIMULTANEOUS DOORS).
F24682 Rev. C (0315) Page 18 of 74
6. Lay the door flat to prevent damage.
7. The top and bottom bearings are now accessible
Fig. 41
door up until the bottom of the door shaft clears
the opening in the sill.
for inspection and/or replacement if needed.
A. If bearings are OK, proceed to step 8.
B. If replacing the top bearing, remove the top
bearing retainer and top bearing.
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
4. Adjust the ball catch as outlined under DOOR
CATCH BALL ADJUSTMENT (INDEPENDENT
DOORS).
ROLLER LATCH ASSEMBLY
(INDEPENDENT DOORS)
NOTE: For units with serial number starting with 48
made after 8/12/07 and serial number starting with 54
made after 8/26/07.
Fig. 42
C. If replacing the bottom bearing, remove it
from the door shaft or the lower sill opening.
8. Reverse procedure to install door assembly and
check for proper adjustment as outlined under
DOOR ADJUSTMENT and DOOR SWITCH
ADJUSTMENT.
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the screws that attach roller latch
assembly to door.
Disconnect the
DOOR CATCH BALL ASSEMBLY
(INDEPENDENT DOORS)
NOTE: For units with serial number starting with 48
made before 8/13/07 and serial number starting with
54 made before 8/27/07.
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the
2. Remove the screws that secure the door catch
assembly.
FRONT COVER.
Fig. 44
2. Reverse procedure to install.
DOOR WINDOW
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the screws at the top and bottom of
door.
Fig. 43
3. Reverse procedure to install.
Page 19 of 74 F24682 Rev. C (0315)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
Fig. 45
2. Independent doors:
A. Remove the door handle then remove the
outer door panel.
B. Lift out the inner door panel and window
assembly.
NOTE: Left door only - remove door seal from the
inside edge of the door.
3. Simultaneous doors:
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 and lift the window assembly
out from the door frame.
Fig. 46
5. Reverse procedure to install the replacement
window.
DOOR SWITCH
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the
2. Disconnect the lead wires to the door switch.
3. Remove the switch.
Top Front Cover.
F24682 Rev. C (0315) Page 20 of 74
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
HIGH LIMIT THERMOSTAT
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Take out racks from the oven.
2. Remove the high limit thermostat cover/mounting
plate from inside the oven cavity at the top.
Fig. 47
4. Reverse procedure to install the replacement
switch and check for proper adjustment as
outlined under DOOR SWITCH ADJUSTMENT.
MECHANICAL KX THERMOSTAT
(VC4GS/6GS)
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the racks and right rack support.
2. Remove the thermostat knob and mounting
screws from the control panel and then remove
the control panel.
3. Remove the probe guard from the oven cavity
wall.
NOTE: When installing, the probe should not extend
beyond the probe 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.
6. Adjust the thermostat as outlined under
MECHANICAL THERMOSTAT CALIBRATION
(VC4GS/6GS).
Fig. 48
3. Disconnect lead wires from high limit thermostat
then remove high limit thermostat from cover/
mounting plate.
Fig. 49
NOTE: Remove the old RTV from the cover and
mating surfaces inside the oven cavity and apply new
RTV before installing.
4. Reverse procedure to install.
Page 21 of 74 F24682 Rev. C (0315)
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
INTERIOR LIGHTS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Lamp
1. Remove the racks.
2. Unscrew the glass lens for the light being
replaced then unscrew the bulb.
Fig. 50
3. Replace bulb then reverse the procedure to
install.
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Lamp Assembly
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.
7. Install the light bulb and lens.
8. Check for proper operation.
COOLING FAN
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the Right Side Panel.
NOTE: If right side panel is not accessible, this
component can be serviced by removing the Control
Panel.
Disconnect the lead wires to the fan motor by
removing wire nuts.
2. Remove the screws securing the air deflector to
the fan then loosen the tab screw holding the fan
to the component panel. Rotate the tab so that
the fan will clear and remove the fan.
1. Remove the lens and bulb.
2. Remove the springs from the retaining tabs (2
places) on the socket.
Fig. 51
3. Reverse the procedure to install the replacement
F24682 Rev. C (0315) Page 22 of 74
Fig. 52
fan and check for proper operation.
VC4G & VC6G SERIES FULL SIZE CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
NOTE: The fan must be installed so air is pulled from
the rear of the oven and blown into the control area.
The arrow on the fan body indicates “air flow” direction
and should be pointing toward the controls.
NOTE: Ensure fan is seated “squarely” against the air
tube and the oven bottom.
NOTE: The air deflector should be angled upwards
at approximately 30 degrees to properly direct the air
flow.
Page 23 of 74 F24682 Rev. C (0315)
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