Vulcan SG4 User Manual
SERVICE MANUAL
SG SERIES GAS CONVECTION
OVENS
MODELS SG4
SG6
STACKED
MODELS
SG44
SG66
- 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
F45525 (0814)
SG SERIES GAS CONVECTION OVENS
TABLE OF CONTENTS
GENERAL .................................................................................................. 3
INTRODUCTION ....................................................................................... 3
INSTALLATION ........................................................................................ 3
OPERATION ........................................................................................... 3
CLEANING ............................................................................................. 3
LUBRICATION ......................................................................................... 3
SPECIFICATIONS ...................................................................................... 3
TOOLS ................................................................................................. 3
REMOVAL AND REPLACEMENT OF PARTS ............................................................... 4
COVERS AND PANELS ................................................................................ 4
TOP FRONT COVER ............................................................................... 4
BOTTOM FRONT COVER .......................................................................... 4
CONTROL PANEL ................................................................................. 4
RIGHT SIDE PANEL ................................................................................ 4
CONTROL PANEL COMPONENTS ..................................................................... 5
COMPONENT PANEL COMPONENTS ................................................................. 5
TEMPERATURE PROBE ............................................................................... 6
GAS BURNER ......................................................................................... 6
GAS ORIFICE .......................................................................................... 7
GAS SOLENOID VALVE ................................................................................ 8
IGNITION CONTROL MODULE ......................................................................... 9
SPARK IGNITER AND FLAME SENSE ................................................................ 10
BLOWER AND MOTOR ............................................................................... 10
OVEN DOORS AND BEARINGS (INDEPENDENT DOORS) ............................................ 12
ROLLER LATCH ASSEMBLY (INDEPENDENT DOORS) ............................................... 13
DOOR WINDOW ...................................................................................... 13
DOOR SWITCH ....................................................................................... 14
HIGH LIMIT THERMOSTAT ........................................................................... 14
INTERIOR LIGHTS .................................................................................... 15
COOLING FAN ........................................................................................ 15
SERVICE PRODCEDURES AND ADJUSTMENTS ......................................................... 17
SOLID STATE TEMPERATURE CONTROL CALIBRATION ............................................ 17
SOLID STATE TEMPERATURE CONTROL TEST ..................................................... 18
TEMPERATURE PROBE TEST ....................................................................... 18
GAS VALVE PRESSURE CHECK ..................................................................... 19
VERIFICATION OF SPARK AT IGNITOR .............................................................. 19
DOOR SWITCH ADJUSTMENT ....................................................................... 20
BLOWER ADJUSTMENT .............................................................................. 20
DOOR ADJUSTMENT ................................................................................. 21
DOOR STRIKE ADJUSTMENT (INDEPENDENT DOORS) ............................................. 22
ELECTRICAL OPERATION ................................................................................ 23
COMPONENT FUNCTION ............................................................................ 23
COMPONENT LOCATION ............................................................................. 24
SEQUENCE OF OPERATION ......................................................................... 25
NORMAL CYCLE ................................................................................. 25
COOL DOWN CYCLE (SOLID STATE TEMPERATURE CONTROL) ................................ 27
SCHEMATICS ........................................................................................ 28
WIRING DIAGRAM .................................................................................... 28
TROUBLESHOOTING ..................................................................................... 29
ALL MODELS ......................................................................................... 29
© VULCAN 2014
F45525 (0814) Page 2 of 30
SG SERIES GAS CONVECTION OVENS - GENERAL
GENERAL
INTRODUCTION
Procedures in this manual will apply to all models
unless specified. Pictures and illustrations can be of
MODELS
FEATURES OPTIONS
MODEL
SG4 26.5" Solid State Independent 1-Hour Dial Optional Optional
SG6 30.5" Solid State Independent 1-Hour Dial Optional Optional
CAVITY
DEPTH
TEMPERTURE
CONTROL
DOORS (50/50)
INSTALLATION
Refer to the Installation and Operation Manual for
detailed installation instructions on single or stacked
ovens.
OPERATION
Refer to the Installation and Operation Manual for
specific operating instructions.
CLEANING
any model unless the picture or illustration needs to
be model specific.
COOK
TIMER
Propane - Recommend (in. W.C.) 11.0, Min 11.0
Maximum 14.0 in. W.C. (Nat. or Prop.)
CASTERS
208/240/60/1
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.
BLOWER
Refer to the Installation and Operation Manual for
specific cleaning instructions.
LUBRICATION
• Cavity blower motor has sealed bearings and
requires no additional lubrication.
• Huskey’s TF1000 grease or equivalent high
temperature Teflon grease.
SPECIFICATIONS
Electrical
Voltage - 120/60/1
Amps - 9.0 Amps
Input BTU Rating
Natural Gas - 60,000 BTU input at 3.5 in. W.C.
Propane Gas - 60,000 BTU input at 10.0 in. W.C.
Gas Line Pressures
Natural - Recommend (in. W.C.) 7.0, Min 5.0
• Gear Puller to remove blower
Special
• Temperature tester (thermocouple type).
• Manometer
Page 3 of 30 F45525 (0814)
SG SERIES GAS 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. 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.
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.
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.
F45525 (0814) Page 4 of 30
3. Pull the right side panel out at the bottom then
4. Reverse the procedure to install.
Fig. 4
down to remove.
SG SERIES GAS 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.
COMPONENT PANEL
COMPONENTS
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Removable Components Procedure
1. Remove the as outlined
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. 5
Page 5 of 30 F45525 (0814)
SG SERIES GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
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.
Fig. 7
5. Remove probe by pushing it through the oven
wall and into the control panel area.
TEMPERATURE PROBE
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove the
Fig. 6
Disconnect the
RIGHT SIDE PANEL.
Fig. 8
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 .
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.
F45525 (0814) Page 6 of 30
SG SERIES GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
2. Disconnect the ignition cable and the flame
sense lead wire.
Fig. 9
3. Disconnect the ignition cable and the flame
sense lead wire.
Fig. 10
4. Remove the screws securing the burner cover
then lift out.
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
2. Remove the bolts securing the gas manifold to
the oven and place the manifold to the side.
3. Remove the gas orifice from the spud on the
manifold and replace with the correct orifice for
the given altitude.
BOTTOM FRONT COVER.
Fig. 13
Fig. 11
5. Grasp the burner and lift out.
Fig. 12
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.
7. Check for proper operation.
Fig. 14
4. Reverse procedure to install and check for proper
operation.
Page 7 of 30 F45525 (0814)
SG SERIES GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
GAS SOLENOID VALVE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
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.
1. Remove the Control Panel and the RIGHT SIDE
PANEL.
NOTE: If is right side panel 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. 16
5. Verify new gas valve is configured for the proper
gas type
Fig. 17
Fig. 15
4. Loosen the bolts securing the valve and bracket
assembly then remove the screws securing the
valve to the bracket.
F45525 (0814) Page 8 of 30
SG SERIES GAS CONVECTION OVENS - REMOVAL AND REPLACEMENT OF PARTS
IGNITION CONTROL MODULE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
SHUT OFF THE GAS BEFORE
SERVICING THE UNIT.
Fig. 18
A. To change gas type unscrew and reverse
cap to show the proper gas type.
1) Make sure gasket is positioned
between cap and valve
body.
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.
Fig. 19
6. Reverse the procedure to install the replacement
gas valve.
7. Check pressure as outlined under GAS VALVE
PRESSURE CHECK
Page 9 of 30 F45525 (0814)
Fig. 20
3. Disconnect the lead wires and igniter cable from
the ignition module board.
Fig. 21
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