Vulcan-Hart 24RRG, Service Manual

Page 1: ...nstruments 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 c...

Page 2: ...VICE PROCEDURES AND ADJUSTMENTS 12 TEMPERATURE CONTROL CALIBRATION 12 BURNER AIR SHUTTER ADJUSTMENT 13 REGULATOR ADJUSTMENT 13 BURNER NOZZLE CHECK 14 THERMOCOUPLE TEST 15 TEMPERATURE CONTROLLER TEST 15 IGNITION MODULE TEST 16 PILOT BURNER FLAME ADJUSTMENT 16 SOLENOID VALVE TESTS 17 ELECTRICAL OPERATION 18 COMPONENT FUNCTION 18 SEQUENCE OF OPERATION 18 24 GRIDDLE WIRING DIAGRAM 20 36 GRIDDLE WIRING...

Page 3: ... are listed under GENERAL in the Installation Operation Manual 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 The operation of the griddle controls pilots and burners are outlined under CONTROLS in the Installation Operation Manual SPECIFICATIONS Electrical 120VAC 50 60Hz...

Page 4: ... 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 Clear silicone sealant RRG SERIES HEAVY DUTY GAS GRIDDLE GENERAL F45514 0214 Page 4 of 24 https appliancetechmanuals com ...

Page 5: ...and follow lockout tagout procedures Shut off the gas before servicing the unit NOTE Remove the back panel when changing a burner temperature probe or to remove excessive grease build up from the flue area 1 Disconnect gas supply at griddle 2 Remove GAS PRESSURE REGULATOR 3 Remove all screws from rear of griddle securing the back panel Fig 2 4 Reverse procedure to install BULL NOSE Disconnect the ...

Page 6: ...nting nut threads 2 From rear of griddle route thermocouple wires and probe through the opening in heat shield 3 Thread temperature 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 r...

Page 7: ...ks Check with a soap and water solution bubbles Do not use an open flame 1 Remove BACK PANEL 2 Remove the nut that is securing burner Fig 8 3 Lift back of burner until locating pin clears hole and pull out burner 4 Reverse proceedure to install PILOT BURNER Disconnect the electrical power to the machine and follow lockout tagout procedures Shut off the gas before servicing the unit All gas joints ...

Page 8: ...on the pilot assembly Fig 11 7 Disconnect flex tubing from pilot burner assembly 8 Pull high voltage spark wire through bottom of griddle 9 Reverse procedure to install NOTE When installing verify spark gap is 1 8 10 Check for proper operation IGNITION MODULE Disconnect the electrical power to the machine and follow lockout tagout procedures 1 Remove grease tray 2 Remove two screws holding ignitio...

Page 9: ...ing 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 CONTROL PANEL NOTE Plumbing and type of burner solenoid valves may vary slightly between different units 2 Label and disconnect dual solenoid valve connectors Fig 14 3 Remove retaining screw that is holding dual solenoid valve body in brack...

Page 10: ...se an open flame 1 Remove CONTROL PANEL NOTE Plumbing and type of Single Solenoid Valve may vary slightly between different units 2 Label and disconnect connectors on single solenoid valve 3 Remove retaining screws that are holding single solenoid valve body in bracket 4 Disconnect compression fitting and remove flex tubing from front of single solenoid valve Fig 16 5 Lift solenoid out of bracket ...

Page 11: ...egulator as outlined in REGULATOR ADJUSTMENT GRIDDLE PLATE ASSEMBLY 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 For larger units removal and replacement of the griddle plate weld ...

Page 12: ...e measurement is 350 F 5 F the control is propererly calibrated If temperature measurement is outside of tolerance then temperature control must be calibrated CALIBRATING TEMPERATURE CONTROL Never adjust the screw on the back side of the temperature controller This will ruin the factory calibration the temperature controller will no longer operate properly and will need to be replaced 1 Use the te...

Page 13: ...e is observed as described in the beginning paragraph no further adjustment is necessary B If flame is yellow tipping and lifting from burner continue with procedure to adjust 8 Disconnect power 9 Remove burner being sure to keep shutter in the current position 10 Open the shutter slightly and tighten the shutter screw 11 Install BURNER 12 Test machine to verify proper operation NOTE The factory d...

Page 14: ...sure 5 Install the regulator closing nut Clean pipe threads and apply thread sealant that is suitable for use with propane gases 6 Reninstall pressure tap plug BURNER NOZZLE CHECK Disconnect the electrical power to the machine and follow lockout tagout procedures Shut off the gas before servicing the unit The burner nozzle is mounted between the griddle gas supply tubing mounting bracket and the u...

Page 15: ... and follow lockout tagout procedures 1 Access the TEMPERATURE CONTROLLER 2 Connect power to the machine 3 Turn on the power switch 4 Verify temperature controller is receiving 120VAC at terminals L1 L2 polarity is correct and machine is properly grounded Fig 27 5 Set temperature dial to 350 F 6 Verify indicator light comes on and burner lights A If heat light and main burners come on but turn off...

Page 16: ...ed to chassis 6 As long as the ignition control module is sensing flame current then the pilot will stay lit PILOT BURNER FLAME ADJUSTMENT Disconnect the electrical power to the machine and follow lockout tagout procedures The RRG series griddle utilizes a solenoid valve and straight compression fitting with needle valve adjustment to control gas flow to pilot burners One to three pilot burners ca...

Page 17: ...re controls to call for heat 5 Check for 120VAC between both terminals on each solenoid Fig 31 Fig 32 A On single solenoid valve if no voltage check wiring and on off power switch B On dual solenoid valve if no voltage check wiring IGNITION MODULE and TEMPERATURE CONTROLLER 6 If 120VAC is present between two terminals after performing previous steps either the solenoid coil or valve is malfunction...

Page 18: ...ol gas flow to the pilot burner may be one of the dual solenoid valves Valves that control gas flow to the pilot burner have an adjustment screw for pilot flame height at the output on the valve body Dual Solenoid Valve s Controls gas to burner Dual solenoid valve is energized by the ignition module after pilot safety circuit is established pilot lit and temperature control is calling for heat Dep...

Page 19: ... from pin 2 on the connector to one side of dual solenoid valve and indicator lights C Indicator lights are dimly lit 4 Turn temperature dials to 350 F A Temperature controller N O contacts close and provide L2 neutral to the other side of dual solenoid valve B Dual solenoid valve energized and gas flows to burners Burners light and begin heating griddle C Indicator lights are brightly lit 5 Gridd...

Page 20: ...24 GRIDDLE WIRING DIAGRAM 24 GRIDDLE WIRING DIAGRAM RRG SERIES HEAVY DUTY GAS GRIDDLE ELECTRICAL OPERATION F45514 0214 Page 20 of 24 https appliancetechmanuals com ...

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Page 22: ...48 GRIDDLE WIRING DIAGRAM 48 GRIDDLE WIRING DIAGRAM RRG SERIES HEAVY DUTY GAS GRIDDLE ELECTRICAL OPERATION F45514 0214 Page 22 of 24 https appliancetechmanuals com ...

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Page 24: ...sense malfunction 4 Gas pressure not within specified range 5 Pilot flame needs adjusted Pilot burner is lit but main burners will not light or maintain flame 1 Power to temperature controller incorrect 2 Temperature controller not calibrated correctly 3 Thermocouple malfunction 4 Temperature controller malfunction 5 Gas pressure incorrect 6 Burner orifice obstructed or malfunction 7 Power to dual...