Griddle User Manual

ManualsBrandsVulcan Materials ManualsGriddle960RX

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.

948RX

SERVICE MANUAL

HEAVY DUTY GAS GRIDDLES

MODELS

924RX MSA24

936RX MSA36

948RX MSA48

960RX MSA60

972RX MSA72

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

F25383 (510)

Summary of content (16 pages)

PAGE 1
SERVICE MANUAL HEAVY DUTY GAS GRIDDLES MODELS 924RX MSA24 936RX MSA36 948RX MSA48 960RX MSA60 972RX MSA72 948RX 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.
PAGE 2
GENERAL TABLE OF CONTENTS GENERAL . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PAGE 3
GENERAL GENERAL The griddle and its parts are hot. Use care when operating, cleaning or servicing the griddle. INTRODUCTION This Service Manual covers specific service information related to the models listed on the front cover and built after March 2010. Procedures in this manual will apply to all 900RX models unless specified. No procedure in this manual will require the removal or raising of the griddle plate.
PAGE 4
GENERAL TOOLS • 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). • Temperature tester (thermocouple type). • U-Tube or Digital Manometer. • Thread sealant suitable for use with natural or propane gas. • Aluminum Foil Tape - McMaster Carr Part No.7631421 or equivalent. • Adapter to test thermocouple, Johnstone Supply Part No. H23-226 or equivalent. 924RX SHOWN 1. Burner assembly 2.
PAGE 5
REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS Back Panel COVERS AND PANELS Front Panel 1. NOTE: It will be necessary to remove the back panel when changing a burner or to remove excessive grease build up from flue area. Turn all thermostats to off position, loosen set screw securing thermostat knobs and pull off knobs. 1. Disconnect gas supply at griddle. 2. Remove screws securing back panel to griddle. 3. Install in reverse order.
PAGE 6
REMOVAL AND REPLACEMENT OF PARTS 2. ELECTRIC IGNITER (900RX) Measure distance between manifold pipe and valve for reassembly later. NOTE: Ignition wires must be routed in front of valves as shown to prevent them from touching hot heat shield. 1. Remove FRONT PANEL. 2. Push tab to release igniter from frame and pull out of unit. 3. Label and disconnect wires from electric igniter. 4. Install in reverse order. 3. Disconnect all gas lines and thermocouple from valve. 4. Remove valve from unit.
PAGE 7
REMOVAL AND REPLACEMENT OF PARTS 3. Remove screws securing thermostat mounting bracket to frame. 4. Pull capillary tube out from underneath griddle plate. 5. Transfer fittings from old thermostat to new thermostat. Use thread sealant. 6. Transfer thermostat mounting bracket to new thermostat. 7. Remove insulator sleeve from old capillary tube and install on new thermostat. 8. Secure end of insulator sleeve to thick end of capillary tube with metal tape as shown. 9.
PAGE 8
REMOVAL AND REPLACEMENT OF PARTS BURNER 1. Remove FRONT PANEL and REAR PANEL. 2. Disconnect gas supply at griddle. 3. Remove screw securing burner to wall. PILOT, THERMOCOUPLE ASSEMBLY 1. Remove FRONT PANEL. 2. From underneath the front of the griddle, remove screw securing pilot assembly bracket. VIEW FROM REAR OF UNIT TO SEE PARTS 4. At rear of unit, pull burner enough to disengage burner pin from frame and pull burner out. 5. Install in reverse order. 6.
PAGE 9
SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS CALIBRATION 2. Set thermostats to 350°F and allow to stabilize. 3. Record the temperature tester readouts for each zone for 3 cycles. 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 10
SERVICE PROCEDURES AND ADJUSTMENTS GAS PRESSURE MEASUREMENT Never adjust the screw in the center of the thermostat shaft. This will ruin the factory calibration; the thermostat will no longer operate properly and will need to be replaced. 8. Once calibration is achieved, tighten the temperature dial screws and knob set screws. 1. Turn the gas supply off at a manual shutoff valve. 2. Remove the control panel. 3. Remove the pressure tap plug and attach manometer. 4. Turn gas back on. 5.
PAGE 11
SERVICE PROCEDURES AND ADJUSTMENTS The supply pressure (upstream of the regulator) should be 7-9” W.C. for natural gas and 11-12” W.C. for propane gas. At no time should the griddle be connected to supply pressure greater than ½ psig (3.45 kPa) or 14” W.C. Graphic shows pressure plug location. NOTE: MSA models are in same locations. There are no shut off valves.
PAGE 12
SERVICE PROCEDURES AND ADJUSTMENTS 8. THERMOCOUPLE TEST 1. A. If 25 - 35 millivolts is measured, the thermocouple is functioning properly. B. If less than 17 millivolts is measured, install a replacement thermocouple. Unscrew thermocouple fitting from safety valve. 9. 2. Install thermocouple test adapter finger tight plus a quarter turn. 3. Install thermocouple into test adapter finger tight plus a quarter turn. NOTE: Over tightening can cause thermocouple tip to short out. 4.
PAGE 13
ELECTRICAL OPERATION ELECTRICAL OPERATION ELECTRICAL DIAGRAM Page 13 of 16 F25383 (510)
PAGE 14
ELECTRICAL OPERATION F25383 (510) Page 14 of 16
PAGE 15
TROUBLESHOOTING TROUBLESHOOTING SYMPTOMS POSSIBLE CAUSES No spark to ignite pilot gas. 1. 2. 3. 4. 5. 6. Power cord unplugged. Igniter switch malfunction. Shorted electrode on ignitor. Ignitor cable malfunction. Interconnecting wiring malfunction. Electric Igniter Module malfunction. Sparks but gas does not ignite. 1. 2. Service gas valve closed. Gas supply not purged of air. Depress pilot safety button until air is purged. Gas supply off or insufficient gas pressure.
PAGE 16
TROUBLESHOOTING F25383 (510) Printed in USA