Vulcan-Hart ASA24 Service Manual
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Vulcan-Hart ASA24 Service Manual

Heavy duty gas griddles
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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
948RX
SERVICE MANUAL
Heavy Duty Gas Griddles
924RX
936RX
948RX
960RX
972RX
MSA24
MSA36
MSA48
MSA60
MSA72
ASA24
ASA36
ASA48
ASA60
ASA72
- NOTICE -
3600 North Point Blvd Baltimore, MD 21222
F25383 (0219)

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Summary of Contents for Vulcan-Hart ASA24

  • Page 1 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 F25383 (0219)

  • Page 2: Table Of Contents

    Heavy Duty Gas Griddles TABLE OF CONTENTS SERVICES UPDATES ..................3 SERVICE UPDATES .

  • Page 3: Services Updates

    AGE, AGM, 900RE, 900RX, and ASA Series Gas Griddle Service Instructions Grease Chute P/N 498234-A Installation Instructions Fundamentals of Gas Service Instructions Rating Plate Locations on Current Vulcan-Hart/Wolf Technical Service Bulletin (TSB) Range Equipment TSB 0842 4 Position/3 Heat Switch - Ranges, Ovens, Technical Service Bulletin (TSB) Broilers TSB 1037A Hobart to Vulcan "Common"...

  • Page 4: General

    Heavy Duty Gas Griddles - GENERAL GENERAL The griddle and its parts are hot. Use care when operating, cleaning or servicing the griddle. position until the gas supply to the unit is cut off or the INTRODUCTION griddle gas shut-off valve is turned to the OFF position. The pilots are monitored by thermocouples and pilot This Service Manual covers specific service safety valves.

  • Page 5: Tools

    Heavy Duty Gas Griddles - GENERAL Pilot flame adjustment TOOLS Top View 924RX • Standard set of hand tools. • VOM with A/C current tester (any quality VOM with a sensitivity of at least 20,000 ohms per volt can be used). •...

  • Page 6: Removal And Replacement Of Parts

    Heavy Duty Gas Griddles - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS Shut off the gas before servicing the unit and follow lockout / tagout procedures. Disconnect the electrical power to the machine and follow lockout / tagout procedures.

  • Page 7: Electric Igniter (900Rx)

    Heavy Duty Gas Griddles - REMOVAL AND REPLACEMENT OF PARTS Measure distance between manifold pipe and ELECTRIC IGNITER (900RX) valve for reassembly later. NOTE: Ignition wires must be routed in front of valves as shown to prevent them from touching hot heat shield.
  • Page 8 Heavy Duty Gas Griddles - REMOVAL AND REPLACEMENT OF PARTS Remove screws securing thermostat mounting bracket to frame. Fig. 9 Fig. 11 Pull capillary tube out from underneath griddle plate. 11. Inlet to burner must be straight. Adjust thread on orifice and/or extension to close gap between Transfer fittings from old thermostat to new orifice and burner to 1/16".

  • Page 9: Burner

    Heavy Duty Gas Griddles - REMOVAL AND REPLACEMENT OF PARTS BURNER PILOT, THERMOCOUPLE ASSEMBLY Disconnect the electrical power to the machine and follow lockout / Disconnect the electrical power to tagout procedures. the machine and follow lockout / tagout procedures. Shut off the gas before servicing the unit and follow lockout / tagout Shut off the gas before servicing the...
  • Page 10 Heavy Duty Gas Griddles - REMOVAL AND REPLACEMENT OF PARTS Service assembly as required and assemble in reverse order being sure bracket is seated in slot for alignment. F25383 (0219) Page 10 of 19...

  • Page 11: Service Procedures And Adjustments

    Heavy Duty Gas Griddles - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS CALIBRATION LEVEL The griddle must be level (side-to-side and front- to-back) during operation to ensure proper performance. Improper leveling can result in uneven temperature distribution, cold spots, and possibly damage electrical components.

  • Page 12: Pilot Adjustment

    Heavy Duty Gas Griddles - SERVICE PROCEDURES AND ADJUSTMENTS Carefully loosen the knob set screw. DO NOT allow the knob to turn. Carefully remove the knob from the thermostat shaft, exposing the temperature dial. Fig. 23 Repeat Steps 3 thru 8 for each zone. PILOT ADJUSTMENT Fig.

  • Page 13: Gas Pressure Regulator Adjustment

    Heavy Duty Gas Griddles - SERVICE PROCEDURES AND ADJUSTMENTS Check gas pressure. 924RX SHOWN Gas pressure should read 4” W.C. for natural and 10” W.C. for propane gas. If not correct, refer to GAS PRESSURE REGULATOR ADJUSTMENT. 10. Turn gas supply off, disconnect manometer and reinstall pressure tap plug.

  • Page 14: Burner Adjustment

    Heavy Duty Gas Griddles - SERVICE PROCEDURES AND ADJUSTMENTS Fig. 26 NOTE: MSA models are in same locations. There are no shut off valves. BURNER ADJUSTMENT For efficient burner operation, it is important that a proper balance of gas volume and primary air supply is maintained to give complete combustion.
  • Page 15 Heavy Duty Gas Griddles - SERVICE PROCEDURES AND ADJUSTMENTS If less than 17 millivolts is measured, install a replacement thermocouple. Remove test adapter. Fig. 28 Install thermocouple test adapter finger tight plus a quarter turn. Install thermocouple into test adapter finger tight plus a quarter turn.

  • Page 16: Electrical Operation

    Heavy Duty Gas Griddles - ELECTRICAL OPERATION ELECTRICAL OPERATION ELECTRICAL DIAGRAM Fig. 30 F25383 (0219) Page 16 of 19...
  • Page 17 Heavy Duty Gas Griddles - ELECTRICAL OPERATION Fig. 31 Page 17 of 19 F25383 (0219)

  • Page 18: Troubleshooting

    Heavy Duty Gas Griddles - TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING SYMPTOMS POSSIBLE CAUSES Power cord unplugged. Igniter switch malfunction. Shorted electrode on ignitor. No spark to ignite pilot gas. Ignitor cable malfunction. Interconnecting wiring malfunction. Electric Igniter Module malfunction. Service gas valve closed. Gas supply not purged of air.

  • Page 19: Vulcan

    Heavy Duty Gas Griddles - TROUBLESHOOTING SYMPTOMS POSSIBLE CAUSES Check gas pressure. Check that burner is properly seated. Check that burner ignition ports, pilot flash tube and pilot burner are all aligned. One burner has a delayed ignition; a several second lapse when the burner actually lights.

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