Vulcan-Hart VG30 User manual

A product of VULCAN-HART LOUISVILLE, KY 40201-0696
F25121(February 2003)
- NOTICE -
This Manual is prepared for the use of trained Vulcan Service
Technicians and should not be used by those not properly
qualified. If you have attended a Vulcan Service School for this
product, you may be qualified to perform all the procedures
described in this manual.
This manual is not intended to be all 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.
Reproduction or other use of this Manual, without the express
written consent of Vulcan, is prohibited.
VG40 SHOWN
SERVICE MANUAL
GAS BRAISING PANS
(30 & 40 GALLON)
VG30 ML-126847
VG40 ML-126848
For additional information on Vulcan-Hart Company or to locate an authorized parts
and service provider in your area, visit our website at www.vulcanhart.com.

GAS BRAISING PANS
F25121 (February 2003) Page 2 of 32
TABLE OF CONTENTS
GENERAL ................................................................................ 3
Installation, Operation and Cleaning ......................................................... 3
Introduction ............................................................................ 3
Control Panel ...................................................................... 3
Model Designations ................................................................. 3
Tools................................................................................. 3
Specifications .......................................................................... 3
REMOVALANDREPLACEMENTOFPARTS .................................................... 4
Covers and Panels ...................................................................... 4
Power Supply Box Components ............................................................ 5
TemperatureController .................................................................. 5
PanPosition/DownLimitSwitch ............................................................ 6
Thermocouple Probe .................................................................... 8
DCLiftMotor .......................................................................... 9
Gear Reducer ......................................................................... 10
GasCombinationValve ................................................................. 11
PilotBurner ........................................................................... 12
Runner Tube .......................................................................... 12
MainBurners ......................................................................... 13
LidSprings ........................................................................... 13
SERVICEPROCEDURESANDADJUSTMENTS................................................. 15
TemperatureControllerCalibration ........................................................ 15
TemperatureControllerTest ............................................................. 16
Thermocouple Test .................................................................... 16
SparkIgnitionTest ..................................................................... 17
PilotBurnerFlameAdjustment............................................................ 18
FlameSenseCurrentTest ............................................................... 19
Ignition Control Module Test .............................................................. 19
GasManifoldPressureAdjustment ........................................................ 20
MainBurners ......................................................................... 21
Inspection ........................................................................ 21
AirShutterAdjustment .............................................................. 21
DCMotorControllerTest ................................................................ 22
PanPosition/DownLimitSwitchAdjustment ................................................. 22
LidSpringTensionAdjustment............................................................ 23
ELECTRICALOPERATION .................................................................. 25
Component Function ................................................................... 25
Component Location ................................................................... 26
Ignition Control Module .................................................................. 27
Sequence of Operation .................................................................. 28
SchematicDiagram .................................................................... 30
TROUBLESHOOTING ...................................................................... 31
Gas Heating (Manual Lift or Motorized Lift Option) ............................................ 31
MotorizedLiftOptionOnly ............................................................... 32
CONDENSED SPARE PARTS LIST ........................................................... 32
© VULCAN 2003

GAS BRAISING PANS
F25121 (February 2003)
Page 3 of 32
GENERAL
INSTALLATION, OPERATION
AND CLEANING
Refer to the Installation & Operation Manual for
specific instructions.
INTRODUCTION
The tilting braising pan (skillet) is a versatile piece of
cooking equipment. It can be used to stew, simmer,
steam, sear, pan fry, grill or saute food products over
an evenly distributed heating surface. Once the
product is fully cooked, the pan can be tilted for ease
of product removal.
Control Panel
Model Designations
!VG30 - 30 gallon capacity
!VG40 - 40 gallons capacity
TOOLS
Standard
!Standard set of hand tools.
!VOM with an AC current tester and DC micro
amp current tester capable of measuring 0-10
micro amps.
NOTE: Any quality VOM with a sensitivity of
20,000 ohms per volt can be used.
!U-Tube Manometer.
!Temperature tester (thermocouple type) with
surface probe.
Special
!1 5/8" open end wrench. Used for removing lid
springs and adjusting lid spring tension.
!Field service grounding kit P/N TL- 84919.
!RTV sealant Dow Corning 732 or equivalent.
Used for sealing the slot in top cover for the gas
combination valve.
!Pipe thread sealant suitable for natural and
propane gases.
SPECIFICATIONS
MODEL
INPUT
BTU/HR
MANIFOLD
PRESSURE
(INCHES W.C.)
LINE PRESSURE
(INCHES W.C.) AMPS (MAX)
@ 120V/60HZ
NATURAL PROPANE
NAT. PROP. NAT. PROP. RECOMMEND MIN RECOMMEND MIN MAX
VG30 90,000 90,000 3.7 10.0 7.0 5.0 11.0 11.0 14.0
3.0
VG40 120,000 120,000 3.7 10.0 7.0 5.0 11.0 11.0 14.0

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS
F25121 (February 2003) Page 4 of 32
REMOVAL AND REPLACEMENT OF PARTS
COVERS AND PANELS
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
Front, Rear & Side Panels
1. Lift up on the bottom edge of panel until it clears
the catch.
2. Tilt outwards and allow the panel to drop down.
3. Reverse procedure to install.
Control Panel
1. Remove front panel.
2. Disconnect conduit from control box.
3. Remove manual lift crank handle (if installed).
4. Remove bolts securing control panel to braising
pan frame. Bolts are recessed in the frame
channel.
5. Tilt bottom of control panel outwards and pull
down.
NOTE: The control panel should be supported to
remove lead wire strain.
6. Remove control box from control panel.
7. Disconnect lead wires from control switch.

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS
F25121 (February 2003)
Page 5 of 32
8. Pull temperature dial from potentiometer shaft
and remove mounting nut.
9. Control panel is removed.
10. To install.
A. Align tab on potentiometer with positioning
bracket on panel.
B. Install mounting nut and tighten.
C. Adjust stop nut on potentiometer body (as
necessary) to ensure a water tight seal on
mounting nut.
D. Attach temperature dial.
11. Reverse procedure from step 6 to complete the
installation.
12. Check calibration as outlined under
TEMPERATURE CONTROLLER
CALIBRATION.
POWER SUPPLY BOX
COMPONENTS
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
CAUTION: Certain components in this system
are subject to damage by electrostatic discharge
during field repairs. A field service grounding kit
is available to prevent damage. The field service
grounding kit must be used anytime a control
board is handled.
1. Remove front panel as outlined under
COVERS AND PANELS.
2. Remove power supply box cover.
3. Remove the component being replaced.
4. Reverse procedure to install the replacement
component then check for proper operation.
TEMPERATURE CONTROLLER
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
1. Remove control box from the control panel as
outlined under COVERS AND PANELS.
2. Disconnect lead wires from temperature
controller.
3. Remove temperature controller from control
box.

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS
F25121 (February 2003) Page 6 of 32
LEFT SIDE VIEW SHOWN
4. Pull temperature dial from potentiometer shaft
and remove mounting nut.
5. To install:
A. Align tab on potentiometer with positioning
bracket on panel.
B. Install mounting nut and tighten.
C. Adjust stop nut on potentiometer body (as
necessary) to ensure a water tight seal on
mounting nut.
D. Attach temperature dial.
6. Reverse procedure from step 3 to complete the
installation.
7. Check calibration as outlined under
TEMPERATURE CONTROLLER
CALIBRATION.
PAN POSITION/DOWN LIMIT
SWITCH
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
1. Remove front and left side panels as outlined
under COVERS AND PANELS.
2. Disconnect conduit and remove pan
position/down limit switch from switch mounting
bracket.
3. Remove cover from switch.
4. Disconnect lead wires and pull wires thru
conduit elbow assembly.
5. Remove conduit elbow assembly from switch.

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS
F25121 (February 2003)
Page 7 of 32
TOP VIEW SHOWN
SIDE VIEW SHOWN
NOTE: When installing, replace the o-ring seal
(provided) inside the brass fitting and re-use conduit
elbow assembly.
6. To install:
A. Position the switch with the head pointing
toward installer and gear cam pointing up.
NOTE: The plunger on the head is spring loaded
and will push the head away from switch body when
the last screw is removed.
B. Remove screws securing the head to
switch body, rotate 90° clockwise and
tighten screws to secure.
C. Place switch on its side with the head to
the left and gear cam pointing up.
D. Align roller arm adaptor with the four
locking tabs pointing up and position one
of the tabs at 0°.
NOTE: The 0° position of the roller arm locking tab
is the starting point for alignment only. The locking
tab cannot remain at the 0° position.
E. Place roller arm adaptor on the gear cam
to engage the teeth. Lift the adaptor until
the teeth just slightly disengage from the
gear cam. Rotate the roller arm adaptor
counterclockwise 1 tooth, re-engage teeth
and release the adaptor.
F. Align the roller arm slots with the four
locking tabs on the roller arm adaptor and
tighten mounting screw to secure.

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS
F25121 (February 2003) Page 8 of 32
G. Verify roller arm position on switch.
1) Measure the distance from the rear of
the switch body to the center of the
roller. The distance should be 3".
H. If distance is ok, proceed to step 7.
I. If distance is not ok, adjust the roller arm
position (as necessary) to obtain the 3"
roller arm dimension.
7. Reverse procedure from step 5 to complete the
installation.
8. Adjust pan position/down limit switch on switch
mounting bracket as outlined under PAN
POSITION SWITCH ADJUSTMENT in
SERVICE PROCEDURES AND
ADJUSTMENTS.
THERMOCOUPLE PROBE
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
1. Access temperature controller as outlined under
TEMPERATURE CONTROLLER .
2. Disconnect thermocouple lead wires.
3. Raise the pan to the full tilt position.
4. Remove insulation cover bracket.
5. Loosen lock nut and remove threaded probe
from pan.

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS
F25121 (February 2003)
Page 9 of 32
VG30 REAR VIEW SHOWN
6. Reverse procedure to install and check for
proper operation.
NOTE: When installing: Route thermocouple wire in
the same manner thru the metal clamps on the hinge
& frame. Tighten thermocouple just until it touches
the pan; do not over tighten or damage to the
thermocouple may occur.
DC LIFT MOTOR
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
1. Remove front, rear and right side panels as
outlined under COVERS AND PANELS.
2. Remove power supply box cover.
3. Disconnect DC lift motor lead wires labeled
MTR+ (positive) & MTR - (negative).
NOTE: Lead wires can be identified by label or
marking on the wire.
4. Loosen the strain relief nut and the hold down
clamps for the motors' power cable. Pull the
cable thru the strain relief opening and remove
the cable form underneath the clamps.
5. Remove motor mounting bolts from gear
reducer flange.
6. Remove motor from gear reducer.

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS
F25121 (February 2003) Page 10 of 32
7. To install:
A. With drive key on shaft, install motor to
gear reducer.
B. Route and secure the motors' power cable
and re-connect motor lead wires.
C. Replace power supply box cover and side
panels.
8. Check for proper operation.
GEAR REDUCER
WARNING: DISCONNECT THE
ELECTRICAL POWER TO THE
MACHINE AND FOLLOW LOCKOUT /
TAGOUT PROCEDURES.
1. Remove right side and rear panels as outlined
under COVERS AND PANELS.
2. Lower the pan (use motorized pan lift or manual
crank).
3. If DC lift motor is installed, remove motor as
outlined under DC LIFT MOTOR.
4. Remove lock nut securing crank assembly to lift
arm.
5. Remove bolts securing gear reducer to braising
pan frame then remove gear reducer.
6. Loosen set screw on crank assembly and
remove the assembly from drive shaft.
7. Loosen set screw on shaft extension coupling
and remove the coupling from manual crank
shaft.
8. To install:
A. With drive key on drive shaft, install crank
assembly and tighten set screw against
key.
B. With drive key on manual crank shaft,
install shaft extension coupling and tighten
set screw against key.
C. Place gear reducer in its mounting location
on frame. Position gear reducer so the
shaft extension coupling is aligned with the
opening in control panel; and the lift arm is
vertical and parallel to the crank assembly
when connected.