Page 1
SERVICE MANUAL
VIG SERIES GAS GRIDDLE
VIG36-R3
VIG48-R3
VIG60-R3
- 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
F45623 (0217)
Page 2
VIG SERIES GAS GRIDDLE
TABLE OF CONTENTS
GENERAL .................................................................................................. 3
INTRODUCTION ....................................................................................... 3
MODELS ............................................................................................... 3
INSTALLATION ........................................................................................ 3
OPERATION ........................................................................................... 3
SPECIFICATIONS ...................................................................................... 3
TOOLS ................................................................................................. 3
REMOVAL AND REPLACEMENT OF PARTS ............................................................... 5
FRONT PANEL ......................................................................................... 5
CONTROL PANEL ..................................................................................... 5
BACK PANEL .......................................................................................... 5
TEMPERATURE CONTROLLER ........................................................................ 6
RADIANT BURNER .................................................................................... 6
THERMOCOUPLE PROBE (RADIANT BURNER) ....................................................... 7
REMOVAL ......................................................................................... 7
INSTALLATION .................................................................................... 7
PILOT (RADIANT BURNER) ............................................................................ 8
IGNITION MODULE .................................................................................... 8
GAS VALVE ............................................................................................ 9
GRIDDLE PLATE ASSEMBLY ......................................................................... 10
INSTALLATION ................................................................................... 11
SERVICE PROCEDURES AND ADJUSTMENTS ........................................................... 12
TEMPERATURE CONTROLLER CALIBRATION ....................................................... 12
GAS MANIFOLD PRESSURE ADJUSTMENT .......................................................... 13
RADIANT BURNER - AIR SHUTTER ADJUSTMENT ................................................... 14
RADIANT BURNER GAS ORIFICE CHECK ............................................................ 15
THERMOCOUPLE TEST .............................................................................. 15
TEMPERATURE CONTROLLER TEST ................................................................ 15
IGNITION MODULE TEST ............................................................................. 16
RADIANT BURNER - PILOT FLAME ADJUSTMENT ................................................... 17
GAS VALVE TESTS ................................................................................... 17
ELECTRICAL OPERATION ................................................................................ 19
COMPONENT FUNCTION ............................................................................ 19
SEQUENCE OF OPERATION ......................................................................... 19
GRIDDLE WIRING DIAGRAM ......................................................................... 20
TROUBLESHOOTING ..................................................................................... 21
TEMPERATURE CONTROLLER - LED DIAGNOSTICS AND OPERATING STATUS .................... 21
IGNITION MODULE - LED DIAGNOSTICS AND OPERATING STATUS ................................ 21
GENERAL ............................................................................................ 22
RADIANT BURNER ................................................................................... 24
© VULCAN 2017
F45623 (0217) Page 2 of 24
Page 3
VIG SERIES GAS GRIDDLE - GENERAL
GENERAL
INTRODUCTION
This Service Manual covers specific service
information related to the models listed on the front
cover. Procedures in this manual will apply to all VIG
Heavy Duty Gas Griddles unless otherwise specified.
Raising the griddle plate is not required for servicing
the griddle components. Griddle components are
serviced through the front and rear. Pictures and
illustrations can be of any model unless the picture or
illustration needs to be model specific.
The VIG griddles are available with two different
cooking surface types:
• Steel (standard).
• Chrome (optional).
MODELS
Vulcan
• VIG36-R3 - 33" x 24" griddle plate.
• VIG48-R3 - 45" x 24" griddle plate.
• VIG60-R3 - 57" x 24" griddle plate.
NOTE: Dimensions given are width x depth.
- 6 foot corded plug with ground provided.
Gas Manifold Pressure:
- Natural Gas 4.0" W.C.
- Propane Gas 10.0" W.C.
Incoming Gas Pressure:
- 7" to 9" W.C. Natural Gas
- 11" to 12" W.C. Propane Gas.
- Incoming pressure should not exceed 14.0" W.C.
(0.5 PSI) for either gas type.
Burner
- Radiant Burners* have one 30,000 BTU/HR burner
for each 11" of griddle width.
*Atmospheric type “U” shaped aluminized steel.
Controls
- One Solid State thermostat with thermocouple probe
for each 11" of griddle width.
- Temperature adjustment range 150°F to 550°F on
both griddle plate surface types.
- One Electronic Ignition module with pilot safety
system for each 11" of griddle width.
INSTALLATION
Generally, installations are made by the dealer or
contracted by the dealer or owner. Detailed
installation instructions are included in Installation &
Operation manual that is sent with each unit.
It should be noted that an improperly installed unit,
especially an unleveled unit can lead to premature
electrical component failures. A unit that is higher in
the front will cause the flue gases to vent improperly
and gather in the front near the electrical components.
OPERATION
Detailed operation instructions are included in the
Installation & Operation manual sent with each unit.
The manual is also available online at
www.vulcanequipment.com.
SPECIFICATIONS
Electrical
- 120VAC 50/60Hz 2 amp single phase.
- One Dual Solenoid gas valve with internal regulator
for each 11" of griddle width.
TOOLS
Standard
• Standard set of hand tools.
• 1/2" crowfoot socket wrench for removing
thermocouple probe.
• VOM with minimum of NFPA-70E CATIII 600V,
UL/CSA/TUV listed. Sensitivity of at least 20,000
ohms per volt and the ability to measure DC
micro amps. Meter leads must also be rated at
CAT III 600V.
• Temperature tester Kit 00-538454 or equivalent
(K type thermocouple preferred) with surface
probe.
• U-Tube or Digital Manometer.
• Thread sealant suitable for use with natural or
propane gas.
Special
Page 3 of 24 F45623 (0217)
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VIG SERIES GAS GRIDDLE - GENERAL
• Torque wrench capable of measuring at least 25
in-lbs. for tightening thermocouple probe to
griddle plate. Bolt size 5/16"-18.
• Safekote 60™ or equivalent Heat Transfer and
Anti-Seize Compound rated for 600°F (purchase
locally). Apply to thermocouple probe.
• Two equal lengths of 2x4 appropriate for the
griddle plate width, leaving additional length to
grasp on each side of griddle plate. Ex. 24"
griddle requires two 36" long 2x4.
F45623 (0217) Page 4 of 24
Page 5
VIG SERIES GAS GRIDDLE - REMOVAL AND REPLACEMENT OF PARTS
REMOVAL AND REPLACEMENT OF PARTS
FRONT PANEL
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
The front panel holds the temperature controllers,
thermostat cycle lights and lighted power switch.
1. Remove four screws securing the front panel to
frame.
Fig. 2
3. Grasp control panel at the top. Lift panel up and
rotate outward to remove from griddle.
Support the control panel to prevent
damage to wiring.
Fig. 1
2. Lay front panel face down in front of the unit while
servicing.
NOTE: Griddles that are 60" and 72" wide have 2
grease drawers.
3. Reverse procedure to install.
CONTROL PANEL
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove FRONT PANEL.
2. Remove two screws securing the control panel to
frame.
4. Reverse procedure to install.
BACK PANEL
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.
NOTE: Remove the back panel when servicing a
burner, temperature probe, pilot burner; or to remove
excessive grease build up from the flue area.
1. Disconnect gas supply at griddle.
2. Remove screws from rear of griddle securing the
back panel.
Page 5 of 24 F45623 (0217)
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VIG SERIES GAS GRIDDLE - REMOVAL AND REPLACEMENT OF PARTS
Fig. 3
3. Reverse procedure to install.
TEMPERATURE CONTROLLER
Fig. 5
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove
2. Remove CONTROL PANEL.
3. Note wire connections (1, Fig. 4) then disconnect
them from temperature controller (2, Fig. 4).
4. Loosen screws (3, Fig. 4) securing knob guard to
control panel to provide clearance for knob
removal.
FRONT PANEL.
7. Reverse procedure to install.
8. Check
CALIBRATION.
TEMPERATURE CONTROLLER
RADIANT BURNER
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.
NOTE: Radiant burner is removed through the front
of griddle.
1. Remove FRONT PANEL.
2. Remove CONTROL PANEL.
3. Remove burner flexible tubing (1,
4. Remove 4 screws (2, Fig. 6) from orifice bracket.
5. Remove 5 screws (3, Fig. 6) from burner support
Fig. 4
5. Loosen set screw then remove knob from
temperature controller shaft.
6. Remove screws securing temperature controller
to control panel.
F45623 (0217) Page 6 of 24
Fig. 6) from the
burner orifice elbow.
plate.
Page 7
VIG SERIES GAS GRIDDLE - REMOVAL AND REPLACEMENT OF PARTS
THERMOCOUPLE PROBE
(RADIANT BURNER)
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Use 1/2" crowfoot socket wrench for
thermocouple removal and replacement. See TOOLS
Fig. 6
6. Remove burner support plate from griddle.
7. Remove thermocouple shield from bottom of
griddle.
A. Pull thermocouple shield (1, Fig. 7) toward
the front of griddle to disengage the rear
mounting tab (2, Fig. 7) on thermocouple
shield, from the support bracket on the
bottom of griddle plate. Rear view of
thermocouple shield shown in Fig. 7.
Fig. 7
8. Remove burner from griddle.
9. Reverse procedure to install and check for proper
operation.
NOTE: When installing burner, ensure the locating
pin and mounting plate at the rear of burner are
properly inserted in the mounting slot. At the front of
griddle, ensure the thermocouple shield front
mounting tab is inserted in the burner shield slot to
support the thermocouple shield.
Removal
1. Remove RADIANT BURNER (steps 1 through
7A) to access thermocouple shield and
thermocouple probe.
2. Note thermocouple wire locations then
disconnect from temperature controller
(Red=negative; Yellow= positive).
3. Remove
4. Loosen mounting nut and remove thermocouple
probe from bottom of griddle plate. Rear view
shown of thermocouple probe in Fig. 8.
Installation
1. Apply a thin coating of heat transfer and antiseize compound to the thermocouple probe tip
and mounting nut threads.
2. Route thermocouple probe through the front
opening in griddle frame and lay it on top of
burner mounting panel (underneath griddle).
3. From rear of griddle, thread thermocouple probe
into the mounting hole in griddle plate and stop
when probe tip touches the plate. Torque the
mounting nut to a maximum of 25 in-lbs.
BACK PANEL.
Fig. 8
Do not over tighten or damage to the
thermocouple probe may occur. Due to the aluminum
plate core, it is also possible to create a raised area
over the probe if overtightened.
Page 7 of 24 F45623 (0217)
Page 8
VIG SERIES GAS GRIDDLE - REMOVAL AND REPLACEMENT OF PARTS
4. Insert rear mounting tab on thermocouple shield
into the support bracket on the bottom of griddle
plate.
5. Route thermocouple wires through the top
opening in burner support plate.
6. Connect thermocouple wires to temperature
controller.
7. Re-install RADIANT BURNER.
8. Re-install BACK PANEL.
9. Check TEMPERATURE CONTROLLER
CALIBRATION.
PILOT (RADIANT BURNER)
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 RADIANT BURNER.
2. Disconnect compression fitting (1, Fig. 9) from
pilot.
When disconnecting compression fitting
for the pilot, support bracket to prevent bending.
3. Remove pilot and mounting bracket (2, Fig. 9)
from the burner mounting panel.
4. Pull spark wire through the hole in control
mounting panel and remove pilot from griddle.
5. Remove pilot from pilot mounting bracket (3, Fig.
9).
Fig. 9
6. Reverse procedure to install.
NOTE: When installing, verify spark gap (1, Fig. 10)
is 1/8" between ignitor electrode (2, Fig. 10) and pilot
flame hood (3, Fig. 10).
Fig. 10
7. Check for proper operation.
1. Remove
F45623 (0217) Page 8 of 24
IGNITION MODULE
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
FRONT PANEL.
Page 9
VIG SERIES GAS GRIDDLE - REMOVAL AND REPLACEMENT OF PARTS
2. Disconnect ignitor cable (1, Fig. 11) and wire
harness connector (2, Fig. 11).
3. Remove screws (3, Fig. 11) securing ignition
module to the mounting bracket.
Fig. 12
Fig. 11
4. Reverse procedure to install and verify proper
operation.
GAS 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.
NOTE: The gas valve is dual solenoid with internal
regulator. One valve supplies gas for the pilot burner
and the other valve supplies gas for the main burner.
4. Disconnect pilot compression fitting nut (1, Fig.
13); and the compression fitting nuts for the gas
outlet (2, Fig. 13 and inlet (1, Fig. 14) connections
on the gas valve. Remove gas valve from griddle.
Fig. 13
1. Remove
2. Remove CONTROL PANEL.
3. Note lead wire locations at terminals 1, 2, 3, and
4 then disconnect from gas valve.
FRONT PANEL.
Page 9 of 24 F45623 (0217)
Fig. 14
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VIG SERIES GAS GRIDDLE - REMOVAL AND REPLACEMENT OF PARTS
5. Note position of pilot block fitting and the two
compression fitting elbows on gas valve.
Remove fittings from valve.
Clean pipe threads and apply thread
sealant that is suitable for use with propane gases.
6. Install fittings on replacement gas valve.
7. Reverse procedure to install gas valve.
8. Perform GAS MANIFOLD PRESSURE
ADJUSTMENT.
GRIDDLE PLATE ASSEMBLY
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
CAUTION Make sure you have a safe lifting plan in
place. VIG griddle weights are 286 lbs. 36”, 388 lbs.
48”, and 485 lbs. 60”.
A. Push thermocouple shield (1, Fig. 16)
toward the front of griddle to disengage the
rear mounting tab (2, Fig. 16) on
thermocouple shield, from the support
bracket on the bottom of griddle plate. Rear
view of thermocouple shield shown in Fig.
16.
Fig. 16
6. Loosen mounting nut and remove thermocouple
probe from bottom of griddle plate. Lay
thermocouple on top of burner untill ready for
installation on replacement griddle plate.
Removal
1. Remove FRONT PANEL.
2. Remove top screw (1, Fig. 15) from burner
support plate for each burner section.
3. Loosen remaining screws on pilot bracket (2, Fig.
15) and burner support plate (3, Fig. 15) for each
burner section. This will allow clearance to
remove the thermocouple shield in step 5A.
Fig. 15
Fig. 17
7. Cut two lengths of 2x4 appropriate for the griddle
plate width, leaving additional length to grasp on
each side of griddle plate.
8. Lift front of griddle plate and support with 2x4
then lift rear of griddle plate and support with 2x4.
Example shown in Fig. 18.
48" and 60" models require two
people to lift.
4. Remove BACK PANEL.
5. Remove thermocouple shield from bottom of
griddle.
F45623 (0217) Page 10 of 24
Fig. 18
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VIG SERIES GAS GRIDDLE - REMOVAL AND REPLACEMENT OF PARTS
9. Lift griddle plate and remove from base of
equipment.
Installation
1. Install replacement griddle plate onto base of
equipment.
2. Apply a thin coating of heat transfer and antiseize compound to the thermocouple probe tip
and mounting nut threads.
3. From rear of griddle, thread thermocouple probe
into the mounting hole in griddle plate and stop
when probe tip touches the plate. Torque the
mounting nut to a maximum of 25 in-lbs.
Do not over tighten or damage to the
thermocouple probe may occur. Due to the aluminum
plate core, it is also possible to create a raised area
over the probe if overtightened.
4. Insert rear mounting tab (1, Fig. 19) on
thermocouple shield into the support bracket on
the bottom of griddle plate (2,
Fig. 19).
7. Tighten remaining screws on pilot bracket and
burner support plate for each burner section.
8. Install BACK PANEL.
9. Install FRONT PANEL
10. Check for proper operation.
Fig. 19
5. Insert the thermocouple shield front mounting tab
(1, Fig. 20) into the burner shield slot to support
the thermocouple shield.
6. Install top screw (2, Fig. 20) from burner support
plate at each burner section, to secure the griddle
plate to base of equipment.
Fig. 20
Page 11 of 24 F45623 (0217)
Page 12
VIG SERIES GAS GRIDDLE - 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 and follow Arc Flash
procedures. If test points are not easily accessible, disconnect power and follow Lockout/Tagout
procedures, attach test equipment and reapply power to test.
TEMPERATURE CONTROLLER
CALIBRATION
NOTE: Ensure the griddle is level before performing
calibration as outlined under LEVELING in the
Installation & Operation Manual.
NOTE: Do not use an infrared thermometer for
measuring griddle surface temperatures. These
devices are highly sensitive to surface color (clean or
dirty), angle of reading and distance from the surface.
Use a temperature meter with surface probe for all
griddle surface temperature measurements.
NOTE: This procedure will need to be performed for
each center point location on all griddle zones.
CALIBRATION CHECK
1. Each temperature controller controls a 12" zone
of the griddle. Center point area of cooking zones
are located 9" from the side splash on the left and
6" on the right), every 11" across the width of
griddle, and 12" back from the front of griddle
plate.
2. Clean the center point areas of cooking zones.
Apply a small amount of clean cooking oil to the
center point areas to ensure good surface probe
contact.
3. Place a thermocouple surface probe in center of
griddle zone to verify actual temperatures
throughout adjustment. See TOOLS for
thermocouple type.
4. Set thermostats to 350°F and allow the
thermostat cycle light to cycle ON and OFF at
least three times to stabilize griddle surface
temperatures.
5. Monitor the thermostat cycle light for the
temperature controller calibration being checked.
When the light cycles OFF, record temperature
for that zone.
CALIBRATING TEMPERATURE CONTROL
Fig. 21
24" wide griddle - Top view shown in Fig. 21.
Center point areas for
1
F45623 (0217) Page 12 of 24
temperature
measurement.
1. Remove FRONT PANEL.
2. Loosen two screws securing knob guard to the
3. Loosen set screw then remove knob (1, Fig. 24)
• If temperature measurement is 350°F ±10°F
the control is properly calibrated.
• If temperature measurement is outside of
tolerance then temperature control must be
calibrated.
control panel for temperature controller being
calibrated.
from temperature control shaft. Do not rotate
the knob during removal.
Page 13
VIG SERIES GAS GRIDDLE - SERVICE PROCEDURES AND ADJUSTMENTS
Fig. 24
4. Loosen screws (2, Fig. 24) on the temperature
dial (3, Fig. 24) so the dial will rotate.
5. Install knob onto the temperature control shaft.
Do not rotate the knob during installation.
6. Rotate temperature dial to match the
temperature reading. Hold dial in position and
remove knob. This adjustment offsets the
indicated temperature on the dial to the actual
temperature measured.
7. Tighten temperature dial screws.
8. Install knob onto the temperature control shaft
and tighten set screw.
9. Repeat
adjustment. Adjust calibration until temperature
is within tolerance.
CALIBRATION CHECK to verify
GAS MANIFOLD PRESSURE
ADJUSTMENT
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
1. Remove FRONT PANEL.
2. Remove CONTROL PANEL.
3. Connect manometer to the manifold pressure
check tubing (1, Fig. 25) for the gas valve being
checked.
Fig. 25
5. Turn gas supply on.
6. Connect power and turn power switch on.
7. Set all the temperature controls on the griddle to
their highest setting and allow burners to light. All
burners must be lit during test and adjustment.
8. Check manifold pressure reading and compare
to the value in the table below.
A. If pressure is within the allowable tolerance,
then no adjustment is necessary. Turn off
the power switch and gas supply. Return
needle valve to the closed position then
disconnect manometer.
B. If pressure is outside the allowable
tolerance, continue with procedure.
PRESSURE READINGS (IN W.C.)
GAS
TYPE
Natural 4.0 7.0 to 9.0
Propane 10.0 11.0 to 12.0
NOTE: To correctly set the manifold pressure, the
incoming line pressure must be within the
recommended values for the gas type shown in the
table.
9. To adjust, remove adjustment screw cap (1, Fig.
MANIFOLD
26) from the gas valve being checked.
INCOMING LINE
RECOMMEND MAX
14.0
4. Open the needle valve (2, Fig. 25) on the pilot
block fitting to allow gas pressure measurement.
Page 13 of 24 F45623 (0217)
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VIG SERIES GAS GRIDDLE - SERVICE PROCEDURES AND ADJUSTMENTS
Fig. 26
10. Turn the adjusting screw to obtain the proper gas
pressure (clockwise = increase;
counterclockwise = decrease).
11. Once the correct pressure has been set, turn off
the power switch and gas supply. Return needle
valve to the closed position then disconnect
manometer.
12. Install the adjustment screw cap.
13. Check for proper operation.
RADIANT BURNER - AIR SHUTTER
ADJUSTMENT
Fig. 27
1. Remove
2. Re-connect gas supply to machine then turn the
supply on.
3. Connect power to machine.
4. Turn power switch on and rotate temperature
controller knob to call for heat.
5. With burner lit, observe flame from back of
machine.
A. If a proper flame is observed as described
BACK PANEL.
in the beginning paragraph, no further
adjustment is necessary.
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
The efficiency of the burner depends on a delicate
balance between the air supply and volume of gas.
Whenever this balance is disturbed, poor operating
characteristics and excessive gas consumption may
occur. An air shutter on the front of the burner controls
the gas mixer balance. A yellow streaming flame on
the burner is an indication of insufficient primary air. A
white-blue flame is a result of excessive primary air. A
proper flame should be blue in color, well-defined and
seated on the burner port.
F45623 (0217) Page 14 of 24
6. Disconnect power and turn gas supply off.
7. Remove
NOTE: The factory default air shutter positions are
half open natural; full open propane.
8. Loosen the air shutter screw and hold the shutter
9. Install radiant burner.
10. Install back panel.
11. Check for proper operation.
B. If flame is yellow tipping and lifting from
burner, continue with procedure to adjust.
RADIANT BURNER.
in place to prevent movement.
A. If flame is yellow streaming, slightly rotate
shutter to open it. Hold shutter in position
and tighten screw to secure the shutter.
B. If flame is white-blue, slightly rotate shutter
to close it. Hold shutter in position and
tighten screw to secure the shutter.
Page 15
VIG SERIES GAS GRIDDLE - SERVICE PROCEDURES AND ADJUSTMENTS
RADIANT BURNER GAS ORIFICE
CHECK
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
Shut off the gas before servicing the
unit.
NOTE: If burner operation seems poor and other
systems have been checked, access the burner for
the griddle section being serviced and inspect the
burner gas orifice.
The gas orifice and elbow fitting (1, Fig. 28) is mounted
to the orifice holder bracket at the front of the burner
venturi inlet.
THERMOCOUPLE TEST
1. Cycle the power switch and set temperature knob
to call for heat. Observe thermostat cycle light on
front panel.
A. If blinking, there may be a problem with
thermocouple or temperature controller. To
identify error code, refer to TEMPERATURE
CONTROLLER - LED DIAGNOSTICS AND
OPERATING STATUS .
2. Access TEMPERATURE CONTROLLER.
3. Remove thermocouple connections from
temperature controller (Red=negative;
Yellow=positive).
Fig. 28
1. Remove FRONT PANEL.
2. Verify gas orifice is threaded into the fitting
properly, and is centered and mounted
perpendicular to the burner venturi opening.
Adjust alignment as necessary.
3. Check gas orifice for blockage or damage. If dirty,
clean with air or water only.
4. Verify gas orifice is correct for the altitude.
Contact the appropriate service support
department for gas orifice information. Please
have the machine model, serial number and gas
type ready.
Fig. 29
4. Check the thermocouple for resistance.
A. If meter reads an overload (OL) condition
(open), or zero ohms (short) replace the
thermocouple and check temperature
controller for proper operation.
5. If resistance is measured, thermocouple is good.
TEMPERATURE CONTROLLER
TEST
1. Cycle the power switch and set temperature knob
to call for heat. Observe thermostat cycle light on
front panel.
A. If blinking, there may be a problem with
thermocouple or temperature controller. To
identify error code, refer to TEMPERATURE
CONTROLLER - LED DIAGNOSTICS AND
OPERATING STATUS .
B. Turn temperature knob to off.
2. Access the TEMPERATURE CONTROLLER.
Page 15 of 24 F45623 (0217)
Page 16
VIG SERIES GAS GRIDDLE - SERVICE PROCEDURES AND ADJUSTMENTS
3. Connect power to the machine.
4. Turn power switch on.
5. Verify temperature controller is receiving
120VAC at pins 1 & 2 on connector, polarity is
correct and machine is properly grounded.
6. Verify thermocouple probe polarity connections
(TC minus - red) (TC plus - yellow).
B. If thermostat cycle light and burner do not
come on, verify internal relay contact
operation. Check for 120VAC at terminals 1
& 2 on gas solenoid valve. If voltage is not
present, install a replacement temperature
controller and perform TEMPERATURE
CONTROLLER CALIBRATION.
IGNITION MODULE TEST
NOTE: Igntion module has 10 second ignition trial
time, 5 second inter-purge (delay) before retry and will
attempt to light pilot 7 times then lockout if
unsuccessful.
1. Cycle the power switch and set temperature knob
to call for heat.
2. Ignition module is energized and ignition cycle
starts. Observe ignition module LED (1, Fig. 31)
through front panel sight glass.
A. If LED is Red and blinking an error code,
there may be a problem with pilot burner,
flame sense or ignition module. To identify
error code, refer to IGNITION MODULE LED DIAGNOSTICS AND OPERATING
STATUS .
Fig. 30
PIN / TERMINAL DESCRIPTION
1 AC IN (HOT)
2 AC IN (NEUTRAL)
INTERNAL RELAY N.O. -
3
4
TC (-) RED - NEGATIVE
TC (+) YELLOW - POSITIVE
7. Turn temperature knob to call for heat.
8. Verify thermostat cycle light on the front panel
turns on and burner lights.
A. If thermostat cycle light and burner come on
but turn off within 10 seconds, perform
THERMOCOUPLE TEST.
NOTE: Temperature controller will de-energize
internal relay if the circuitry detects an open
thermocouple and the thermostat cycle light will
display a blink code.
OUTPUT TO GAS
SOLENOID VALVE
TERMINAL 1
COM LINE IN - JUMPER
FROM PIN 2
B. LED is Green and blinking during ignition
trial and inter-purge. LED then turns to solid
Green when pilot flame is established (flame
is sensed).
Fig. 31
3. Pilot solenoid valve energized by pilot valve
output from ignition module (pin 2) allowing gas
flow to the pilot burner. Ignition module generates
spark voltage and ignitor begins sparking. If there
is no spark then check the following.
A. Check for 120VAC at ignition module pin 3
(NEUTRAL) and pin 4 (120V).
F45623 (0217) Page 16 of 24
Page 17
VIG SERIES GAS GRIDDLE - SERVICE PROCEDURES AND ADJUSTMENTS
B. Inspect ignitor cable for damage and
continuity.
C. Verify spark gap is set at 1/8".
D. If component passes the above tests and is
not sparking, then replace ignition module.
4. Pilot burner lights and flame is sensed. If
electrode continues to spark after pilot is lit then
check the following.
A. On models with Radiant burner, verify the
electrode is fully engulfed by pilot flame.
B. Verify ground wire (pin 1) from ignition
module is securely grounded to chassis.
5. As long as the ignition module is sensing flame
current, then the pilot will stay lit.
6. Main burner valve energized by main valve
output (pin 5) from ignition module allowing gas
flow to burner and the burner lights.
RADIANT BURNER - PILOT FLAME
ADJUSTMENT
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
The VIG series griddle with Radiant burner utilizes a
gas valve (dual solenoid) and pilot block fitting with
needle valve adjustment to control gas flow to pilot
burner. Each 12" griddle section has individual
controls.
1. Turn thermostat knob to the off position.
2. Remove
3. Connect power to machine and turn power switch
on.
BACK PANEL.
A. To increase pilot flame turn valve needle
counterclockwise. To decrease pilot flame,
turn valve needle clockwise.
Fig. 32
Pilot Flame Adjustment Fig. 32
Item Description
1 Needle valve
2 Pilot valve
3 Gas valve (dual solenoid)
8. Once pilot flame is adjusted correctly, turn
thermostat knob to call for heat.
9. Verify pilot burner remains lit when burner lights.
Adjust pilot flame as necessary.
10. Turn thermostat knob to the off position.
11. Disconnect power to machine.
12. Install panels.
13. Check for proper operation.
GAS VALVE TESTS
4. Ignitor begins sparking and pilot valve opens to
allow gas to pilot. Visually inspect pilot flame:
A. If flame envelops 3/8" to 1/2" of the ignitor/
flame sense electrode, pilot burner is
adjusted properly.
B. If flame is outside of specified range,
continue with procedure.
5. Remove FRONT PANEL.
6. Remove CONTROL PANEL.
7. Locate the needle valve and adjust.
Page 17 of 24 F45623 (0217)
Disconnect the
electrical power to the machine and
follow lockout / tagout procedures.
1. Remove
2. Remove CONTROL PANEL
3. Connect power to machine.
4. Turn on power switch and adjust temperature
controller to call for heat.
FRONT PANEL.
Page 18
VIG SERIES GAS GRIDDLE - SERVICE PROCEDURES AND ADJUSTMENTS
Fig. 33
Gas Valve Tests Fig. 33
Item Description
1 Main burner valve
2 Pilot valve
3 Gas valve (dual solenoid)
5. Check for 120VAC to the gas valve (dual
solenoid) - Main burner solenoid valve (terminals
1 & 2) and Pilot solenoid valve (terminals 3 & 4).
A. If no voltage to either one of the solenoid
valves, check wiring connections.
B. If pilot solenoid valve has no voltage,
perform IGNITION MODULE TEST.
C. If main burner solenoid valve has no
voltage, perform IGNITION MODULE
TEST and TEMPERATURE
CONTROLLER TEST.
6. If 120VAC is present on solenoid valve terminals
after performing previous steps, either the
solenoid coil or valve is malfunctioning.
7. To determine if solenoid coil is malfunctioning,
check resistance between main burner solenoid
(terminals 1 & 2) and pilot solenoid (terminals 3
& 4). Readings of 100 ohms or less on either
solenoid indicate a shorted coil. Install a
replacement gas valve and verify GAS
MANIFOLD PRESSURE ADJUSTMENT.
F45623 (0217) Page 18 of 24
Page 19
VIG SERIES GAS GRIDDLE - ELECTRICAL OPERATION
ELECTRICAL OPERATION
COMPONENT FUNCTION
Temperature
Controller .............
Thermocouple
Probe .................
Power Switch (SPST
Switch) ...............
Thermostat Cycle
Light ..................
Ignition Module ....... Controls and monitors gas heating. Generates spark to light gas at the pilot burner,
Ignitor/Flame Sense
Electrode .............
Pilot Burner ........... When lit, lights the main burner.
Gas Valve ............. A dual solenoid valve with internal regulator that controls gas flow to the pilot burner and
SEQUENCE OF OPERATION
Operation is the same for all griddle models. Each 11"
heat zone on the griddle plate has its own temperature
controller, thermostat cycle light and ignition system
components. Refer to GRIDDLE WIRING DIAGRAM.
1. Conditions.
A. 120VAC connected to griddle and is
properly grounded.
B. Incoming neutral line - L2 is connected to
power switch terminal N (non switching) and
to each:
1) Ignition module connector at pin 3
NEUTRAL.
2) Temperature controller at the LINE
terminal (internal relay - COM) and
jumpered to pin 2 NEUTRAL on
temperature controller.
C. Incoming hot line - L1 is connected to power
switch terminal L1.
D. Power switch off (SPST).
Controls griddle surface temperature for the individual heat zone by monitoring
thermocouple input (K type ).
Senses griddle surface temperature for the individual heat zone using a K type
thermocouple. Provides input to the temperature controller.
Controls power to all electrical components - gas valve (double regulated), temperature
controller and ignition module).
When lit, the light (red LED) indicates temperature controller is calling for heat (internal
contacts closed, output is on).
monitors the presence of flame and energizes the main burner solenoid valve upon a call
for heat from the temperature control. Module has a 10 second ignition trial time, a 5
second inter-purge (delay) before retry and will attempt to light pilot for 7 times then
lockout if unsuccessful.
Ignites pilot burner and senses the presence of a flame. Provides flame sense input to
the ignition module.
main burner. Pilot solenoid valve is energized by the ignition module after power switch
is turned on. Main burner solenoid valve is energized by the temperature controller after
the pilot safety circuit is established (pilot lit) and thermostat is calling for heat.
E. Temperature knobs OFF.
F. Griddle temperature below 150°F.
G. Gas supply on.
2. Turn power switch ON.
A. Power switch internal red light turns on.
B. All ignition modules are powered at pin 4
(120V).
C. Ignition modules generate spark voltage
from the spark/sense terminals to begin
sparking at the ignitor/flame sense
electrode. LED's blink green during 5
second inter-purge (delay) and 10 second
trial for ignition (normal operation).
D. Ignition modules turn on the pilot valve
output at pin 2 and provide 120V to terminal
3 on the pilot valves. Pilot valve solenoids
on the gas valves are energized and gas
flows to pilot burners.
E. Pilot burners light, flame is sensed and
ignitors stop sparking. LED stops blinking
and remains solid green.
Page 19 of 24 F45623 (0217)
Page 20
VIG SERIES GAS GRIDDLE - ELECTRICAL OPERATION
F. Ignition modules turn on the main valve
output at pin 5.
G. L1 present at terminal 2 on the main valve
solenoids output and jumpered to LINE IN
at pin 1 on temperature controllers.
Temperature controllers are powered.
3. Turn temperature knobs to 350°F.
A. Thermostat cycle lights (red) turn on. The
lights will cycle on/off with the call for heat.
B. Temperature controller's internal contacts
close (N.O.) and provide L2 (neutral) from
the OUT terminal to terminal 1 for main
burner solenoids on the gas valves.
C. Main burner solenoids on gas valves are
energized and gas flows to each burner.
Burners light and begin heating griddle.
4. Griddle will continue to cycle with the
temperature controller until the temperature knob
is turned off; or the power switch is turned off.
GRIDDLE WIRING DIAGRAM
NOTE: The base model griddle is 24" wide. Each additional 11" griddle section has its own set of identical controls
that are conected using a 12" add on wire harness. Because the components and wiring are identical for each
section, the diagram below can be used for all models.
GRIDDLE WIRING DIAGRAM
F45623 (0217) Page 20 of 24
Page 21
VIG SERIES GAS GRIDDLE - TROUBLESHOOTING
TROUBLESHOOTING
TEMPERATURE CONTROLLER - LED DIAGNOSTICS AND OPERATING
STATUS
NOTE: Each of the individual thermostat LED's are externally mounted to the front panel and are refered to as
thermostat cycle lights. Each 11" griddle section has individual controls.
LED Codes
• Solid Red - Indicates temperature controller internal relay is energized "Call For Heat" requested.
• Two quick flashes every 3 seconds indicates a “No Heating” fault condition.
- LED sequence is - ON for 1 second, OFF for 1 second, ON for 1 second, then OFF for 4 seconds and
repeats.
• Three quick flashes every 3 seconds indicates temperature probe input circuit is open.
- LED sequence is - ON for 1 second, OFF for 1 second, ON for 1 second, OFF for 1 second ON for 1
second, then OFF for 4 seconds and repeat.
• Continuous ON - OFF - ON - OFF - ON cycle indicates an internal problem and the temperature controller
must be replaced.
IGNITION MODULE - LED DIAGNOSTICS AND OPERATING STATUS
LED Green for Normal Operation
• Green, ½ sec on, ½ sec off
• Green, blinking rapidly
• Green, on solid
LED Red for Error on Operation
Upon detection of a fault by the ignition modules internal diagnostics, sparking is turned off and the output for the
pilot valve and main valve are turned off (valves close). De-pending on the error, the ignition module then enters
lockout mode or standby mode and flashes a red LED error code.
• In lockout mode, all operation is disabled. To clear the error, power must be removed from the module or the
temperature controller must be cycled (OFF/ON) to the remove the call for heat.
• In standby mode, the control disables operation until the error is corrected, at which time the normal operation
sequence is initiated again.
- Inter-purge (delay before ignition re-try if flame is lost)
- Trial for ignition
- Flame detected, pilot/main burner on
Page 21 of 24 F45623 (0217)
Page 22
VIG SERIES GAS GRIDDLE - TROUBLESHOOTING
IGNITION MODULE ERROR CODES
Red Flashes Error Definition Error Type Possible Cause
1. Verify gas supply is turned on and gas
supply pressure is correct.
2. Air not purged from gas supply line.
Cycle power switch 2-3 times to see if
1 flash, then
pause
2 flashes, then
pause
3 flashes, then
pause
No pilot flame in
trial time
Flame sense stuck
on
Pilot valve or Main
valve output - relay
malfunction
Lockout
Lockout 1. Ignition module malfunction.
Lockout 1. Ignition module malfunction.
pilot will light.
3. Gas orifice clogged.
4. Ignitor not sparking - Check wiring
connections, condition of ignitor (cracks
in ceramic or corrosion build up on flame
sense probe) and spark gap.
1. Verify gas supply is turned on and gas
supply pressure is correct.
4 flashes, then
pause
7 flashes, then
pause
On Solid Red
Repetitive flame
loss error
Internal control
error
Line voltage or
Frequency error
2. Gas orifice clogged.
3. Pilot flame is not in good contact with
flame sense probe.
Lockout
Lockout 1. Ignition module malfunction.
Standby
4. Ignitor malfunction - Check wiring
connections, condition of ignitor (cracks
in ceramic or corrosion build up on flame
sense probe) and spark gap.
5. Heavy drafts in room or vent hood
settings.
1. Verify 120VAC supply, polarity is correct
and ground is present.
2. Voltage drops or power brown outs
during times of heavy usage; or electrical
nose created by other equipment
running on the same line.
GENERAL
NOTE: Before performing any of the troubleshooting steps listed in this section, check to see if the LED's for the
TEMPERATURE CONTROLLER - LED DIAGNOSTICS AND OPERATING STATUS and the IGNITION MODULE
- LED DIAGNOSTICS AND OPERATING STATUS are blinking to indicate a possible problem with the component.
The service technician can use the LED blinking codes to assist in determining if these components are functioning
properly or in need of replacement.
F45623 (0217) Page 22 of 24
Page 23
VIG SERIES GAS GRIDDLE - TROUBLESHOOTING
GENERAL
PROBLEM POSSIBLE CAUSES
1. Power switch inoperative.
2. No power to ignitor module.
No spark to ignite pilot burner.
Spark at ignitor but pilot burner does not light.
Pilot burner will not stay lit.
3. Ignition module not properly grounded.
4. Spark gap incorrect.
5. Ignitor/flame sense wire inoperative.
6. Ignition module malfunction.
1. No power to pilot solenoid valve.
2. Pilot solenoid valve malfunction.
3. Gas supply off or insufficient.
1. Spark/flame sense wire connections
incorrect.
2. Improper ground on pilot burner.
3. Ignitor/flame sense malfunction.
4. Gas pressure not within specified range; or
Incorrect gas type.
5. Pilot flame needs adjusted.
1. Power to temperature controller incorrect.
2. Thermocouple probe malfunction.
3. Temperature controller malfunction.
Pilot burner is lit but main burners will not light or maintain flame.
High/Low heat.
4. Gas pressure incorrect or incorrect gas type.
5. Burner orifice obstructed or malfunction.
6. Power to main burner valve incorrect.
7. Main burner valve malfunction.
1. Gas pressure incorrect; or incorrect gas
type.
2. Burner orifice malfunction or incorrect. See
RADIANT BURNER GAS ORIFICE
CHECK.
3. Air shutter not properly adjusted.
4. Thermocouple probe malfunction.
5. Temperature controller not properly
calibrated.
Page 23 of 24 F45623 (0217)
Page 24
VIG SERIES GAS GRIDDLE - TROUBLESHOOTING
RADIANT BURNER
RADIANT BURNER
SYMPTOM POSSIBLE CAUSE
1. Orifice incorrect size or dirty.
2. Air shutter not adjusted correctly or dirty
Burner flame too yellow.
Low burner flame (all burners).
Low burner flame (individual burner). 1. Air mixture incorrect.
Burner flame floats on burner.
3. Incorrect gas pressure.
4. Incorrect gas type.
5. Orifice misaligned in venturi.
6. Appliance not venting properly.
1. Gas valve not adjusted properly or low gas pressure.
2. Incorrect gas type.
1. Inadequate air supply.
2. Restricted exhaust flue.
F45623 (0217) Page 24 of 24
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