Vulcan Hart VG30 SERVICE MANUAL

VG40 SHOWN

SERVICE MANUAL

GAS BRAISING PANS

(30 & 40 GALLON)

VG30 ML-126847

VG40 ML-126848

- 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.

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.

A product of VULCAN-HART LOUISVILLE, KY 40201-0696

F25121(February 2003)

GAS BRAISING PANS

TABLE OF CONTENTS

GENERAL ................................................................................ 3

Installation, Operation and Cleaning ......................................................... 3

Introduction ............................................................................ 3

Control Panel ...................................................................... 3

Model Designations ................................................................. 3

Tools................................................................................. 3

Specifications ..........................................................................3

REMOVAL AND REPLACEMENT OF PARTS .................................................... 4

Covers and Panels ...................................................................... 4

Power Supply Box Components ............................................................ 5

Temperature Controller .................................................................. 5

Pan Position/Down Limit Switch ............................................................ 6

Thermocouple Probe .................................................................... 8

DC Lift Motor .......................................................................... 9

Gear Reducer ......................................................................... 10

Gas Combination Valve ................................................................. 11

Pilot Burner ........................................................................... 12

Runner Tube .......................................................................... 12

Main Burners ......................................................................... 13

Lid Springs ........................................................................... 13

SERVICE PROCEDURES AND ADJUSTMENTS ................................................. 15

Temperature Controller Calibration ........................................................ 15

Temperature Controller Test ............................................................. 16

Thermocouple Test .................................................................... 16

Spark Ignition Test ..................................................................... 17

Pilot Burner Flame Adjustment............................................................ 18

Flame Sense Current Test ............................................................... 19

Ignition Control Module Test .............................................................. 19

Gas Manifold Pressure Adjustment ........................................................ 20

Main Burners ......................................................................... 21

Inspection ........................................................................ 21

Air Shutter Adjustment .............................................................. 21

DC Motor Controller Test ................................................................ 22

Pan Position/Down Limit Switch Adjustment ................................................. 22

Lid Spring Tension Adjustment............................................................ 23

ELECTRICAL OPERATION .................................................................. 25

Component Function ................................................................... 25

Component Location ................................................................... 26

Ignition Control Module .................................................................. 27

Sequence of Operation .................................................................. 28

Schematic Diagram .................................................................... 30

TROUBLESHOOTING ...................................................................... 31

Gas Heating (Manual Lift or Motorized Lift Option) ............................................ 31

Motorized Lift Option Only ............................................................... 32

CONDENSED SPARE PARTS LIST ........................................................... 32

F25121 (February 2003) Page 2 of 32

GAS BRAISING PANS

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.

MODEL

! 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

INPUT

BTU/HR

NAT. PROP. NAT. PROP. RECOMMEND MIN RECOMMEND MIN MAX

MANIFOLD

PRESSURE

(INCHES W.C.)

NATURAL PROPANE

LINE PRESSURE

(INCHES W.C.)

AMPS (MAX)

@ 120V/60HZ

VG30 90,000 90,000 3.7 10.0 7.0 5.0 11.0 11.0 14.0

VG40 120,000 120,000 3.7 10.0 7.0 5.0 11.0 11.0 14.0

Page 3 of 32

F25121 (February 2003)

3.0

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS

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.

5. Tilt bottom of control panel outwards and pull down.

Control Panel

1. Remove front panel.

2. Disconnect conduit from control box.

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.

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.

F25121 (February 2003) Page 4 of 32

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS

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.

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.

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.

Page 5 of 32

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.

F25121 (February 2003)

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS

4. Pull temperature dial from potentiometer shaft and remove mounting nut.

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.

LEFT SIDE VIEW SHOWN

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.

3. Remove cover from switch.

4. Disconnect lead wires and pull wires thru conduit elbow assembly.

5. Remove conduit elbow assembly from switch.

F25121 (February 2003) Page 6 of 32

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS

NOTE: When installing, replace the o-ring seal (provided) inside the brass fitting and re-use conduit elbow assembly.

6. To install:

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.

SIDE VIEW SHOWN

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.

TOP VIEW SHOWN

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.

Page 7 of 32

F. Align the roller arm slots with the four

locking tabs on the roller arm adaptor and tighten mounting screw to secure.

F25121 (February 2003)

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS

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.

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.

5. Loosen lock nut and remove threaded probe from pan.

F25121 (February 2003) Page 8 of 32

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS

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.

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.

VG30 REAR VIEW SHOWN

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.

5. Remove motor mounting bolts from gear reducer flange.

6. Remove motor from gear reducer.

3. Disconnect DC lift motor lead wires labeled MTR+ (positive) & MTR - (negative).

Page 9 of 32

F25121 (February 2003)

GAS BRAISING PANS - REMOVAL AND REPLACEMENT OF PARTS

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.

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:

5. Remove bolts securing gear reducer to braising pan frame then remove gear reducer.

F25121 (February 2003) Page 10 of 32

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.

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