Vulcan-Hart VCCG Series, Service Manual

Page 1: ... 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 ...

Page 2: ...CE PROCEDURES AND ADJUSTMENTS 14 TEMPERATURE CONTROLLER CALIBRATION 14 RADIANT BURNER AIR SHUTTER ADJUSTMENT 15 GAS MANIFOLD PRESSURE ADJUSTMENT 15 BURNER GAS ORIFICE CHECK 16 THERMOCOUPLE TEST 17 TEMPERATURE CONTROLLER TEST 17 IGNITION MODULE TEST 18 RADIANT BURNER PILOT FLAME ADJUSTMENT 19 GAS VALVE TESTS 19 INFRARED BURNER 20 ADJUSTMENT 20 FLAME APPEARANCE 20 ELECTRICAL OPERATION 21 COMPONENT F...

Page 3: ...hat is sent with each unit It should be noted that an improperly installed unit especially an unleveled unit can lead to premature electrical component failures A unit that is higher in the front will cause the flue gases to vent improperly and gather in the front near the electrical components OPERATION Detailed operation instructions are included in the Installation Operation Manual sent with ea...

Page 4: ...probe U Tube or Digital Manometer Thread sealant suitable for use with natural or propane gas Special Torque wrench capable of measuring at least 25 in 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 VCCG Series Heavy Duty Gas Griddle GENERAL F45533 ...

Page 5: ...st be checked for leaks Check with a soap and water solution bubbles Do not use an open flame NOTE Remove the back panel when servicing a burner temperature probe pilot burner or to remove excessive grease build up from the flue area 1 Disconnect gas supply at griddle 2 Remove all screws from rear of griddle securing the back panel Fig 2 3 Reverse procedure to install CONTROL DEFLECTOR HEAT SHIELD...

Page 6: ...BRATION RADIANT BURNER 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 NOTE Radiant burner is removed through the front of griddle 1 Remove BACK PANEL 2 Remove FRONT PANEL 3 Remove CO...

Page 7: ... Align mounting screw head on the burner air shutter to the slot in heat shield assembly hole and remove burner from heat shield 10 Reverse procedure to install and check for proper operation THERMOCOUPLE RADIANT BURNER Disconnect the electrical power to the machine and follow lockout tagout procedures Removal 1 Remove RADIANT BURNER steps 1 through 8 to access thermocouple shield and thermocouple...

Page 8: ...he support bracket on the bottom of griddle plate 6 Route thermocouple wires through the opening in burner shield assembly 7 Re install RADIANT BURNER 8 Check TEMPERATURE CONTROLLER CALIBRATION PILOT RADIANT BURNER 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 ...

Page 9: ...e 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 NOTE The gas valve is dual solenoid with internal regulator One valve supplies gas for the pilot burner and the other valve supplies gas for the main burner 1 Remove FRONT PANEL 2 Note lead wire locations and disconnect from gas valve Fig 15 3 Disconnect ...

Page 10: ...sion fitting from pilot orifice fitting at pilot venturi inlet on burner 5 Disconnect compression fitting from burner orifice fitting at burner venturi inlet Two wrenches may be required to disconnect compression fittings if the orifice fittings begin to turn or damage to the flexible tubing may occur Use 1 wrench on compression fitting and 1 wrench on the orifice fitting Fig 17 6 Disconnect the p...

Page 11: ...m of griddle plate Fig 21 9 Remove insulating sleeve from thermocouple wires and retain for use on replacement thermocouple Installation 1 Slide insulating sleeve over thermocouple wires 2 Apply a thin coating of heat transfer and anti seize compound to the thermocouple probe tip and mounting nut threads 3 Route thermocouple probe through the front opening in griddle frame and lay it on top of bur...

Page 12: ...mper from ignitor terminals 3 Remove screws securing ignitor to burner shield Fig 22 4 Ensure spark gap between ignitor electrode and ground rod is approximately 1 8 If adjustment is necessary position the ground rod to achieve the correct spark gap 5 Reverse procedure to install and check for proper operation Fig 23 PILOT ORIFICE INFRARED BURNER Disconnect the electrical power to the machine and ...

Page 13: ...emoval and replacement of the griddle plate weld assembly should be done by more than one service technician 1 Remove FRONT PANEL 2 Remove BACK PANEL 3 Remove THERMOCOUPLE INFRARED BURNER or THERMOCOUPLE RADIANT BURNER from griddle plate Leave thermocouple wires connected at temperature controller 4 Remove screws 2 securing griddle plate to frame at the front of griddle 5 Cut two lengths of 2x4 ap...

Page 14: ... light for the temperature controller calibration being checked When the light cycles OFF record temperature for that zone If temperature measurement is 350 F 10 F the control is properly calibrated If temperature measurement is outside of tolerance then temperature control must be calibrated CALIBRATING TEMPERATURE CONTROL 1 Remove FRONT PANEL 2 Loosen screws 2 securring knob guard to the control...

Page 15: ... beginning paragraph no further adjustment is necessary B If flame is yellow tipping and lifting from burner continue with procedure to adjust 6 Disconnect power and turn gas supply off 7 Remove RADIANT BURNER NOTE The factory default air shutter positions are half open natural full open propane 8 Loosen the air shutter screw and hold the shutter in place to prevent movement A If flame is yellow s...

Page 16: ...e table 8 To adjust remove adjustment screw cap from the gas valve being checked 9 Turn the adjusting screw to obtain the proper gas pressure clockwise increase counterclockwise decrease 10 Once the correct pressure has been set turn off the power switch and gas supply Return needle valve to the closed position then disconnect manometer 11 Install the adjustment screw cap 12 Check for proper opera...

Page 17: ...RATURE CONTROLLER 3 Remove thermocouple connections from temperature controller Fig 33 4 Check the thermocouple for resistance A If meter reads an overload OL condition open or zero ohms short replace the thermocouple and check temperature controller for proper operation 5 If resistance is measured thermocouple is good TEMPERATURE CONTROLLER TEST 1 Cycle the power switch and set temperature knob t...

Page 18: ...n error code there may be a problem with pilot burner flame sense or ignition module To identify error code refer to IGNITION MODULE LED DIAGNOSTICS AND OPERATING STATUS B LED is Green and blinking during ignition trial and inter purge LED then turns to solid Green when pilot flame is established flame is sensed Fig 35 3 Pilot solenoid valve energized by pilot valve output from ignition module pin...

Page 19: ...move FRONT PANEL 6 Locate the needle valve and adjust Fig 36 A To increase pilot flame turn valve needle counterclockwise To decrease pilot flame turn valve needle clockwise 7 Once pilot flame is adjusted correctly turn thermostat knob to call for heat 8 Verify pilot burner remains lit when burner lights Adjust pilot flame as necessary 9 Disconnect power to machine 10 Install front and rear panels...

Page 20: ...STMENT INFRARED BURNER Adjustment The only adjustment for the Infared burner is the gas manifold pressure Verify the pressure is set correctly as outlined under GAS MANIFOLD PRESSURE ADJUSTMENT Flame Appearance Access the infrared burner by removing BACK PANEL When the Infared burner first lights you should see a small rolling blue flame which will clear up after the burner warms Once warm a low p...

Page 21: ... valve is energized by the temperature controller after the pilot safety circuit is established pilot lit and thermostat is calling for heat SEQUENCE OF OPERATION Operation is the same for all griddle models Each 12 heat zone on the griddle plate has its own temperature controller thermostat cycle light and ignition system components Refer to Griddle Wiring Diagram AI3724 1 Conditions A 120VAC con...

Page 22: ...s on the gas valves C Main burner solenoids on gas valves are energized and gas flows to each burner Burners light and begin heating griddle 4 Griddle will continue to cycle with the temperature controller until the temperature knob is turned off or the power switch is turned off GRIDDLE WIRING DIAGRAM NOTE The base model griddle is 24 wide Each additional 12 griddle section has its own set of ide...

Page 23: ...d the temperature controller must be replaced IGNITION MODULE LED DIAGNOSTICS AND OPERATING STATUS LED Green for Normal Operation Green sec on sec off Green blinking rapidly Green on solid Inter purge delay before ignition re try if flame is lost Trial for ignition Flame detected pilot main burner on LED Red for Error on Operation Upon detection of a fault by the ignition modules internal diagnost...

Page 24: ...not in good contact with flame sense probe 4 Ignitor malfunction Check wiring connections condition of ignitor cracks in ceramic or corrosion build up on flame sense probe and spark gap 5 Heavy drafts in room or vent hood settings 7 flashes then pause Internal control error Lockout 1 Ignition module malfunction On Solid Red Line voltage or Frequency error Standby 1 Verify 120VAC supply polarity is...

Page 25: ...ure not within specified range or Incorrect gas type 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 Thermocouple malfunction 3 Temperature controller malfunction 4 Gas pressure incorrect or incorrect gas type 5 Burner orifice obstructed or malfunction 6 Power to main burner valve incorrect 7 Main burn...

Page 26: ...rner If a technician sees a griddle with Infrared burner mounted in a location close to a fryer or charbroiler please recommend to the customer to move the griddle away from the grease laden air source to prolong the life of the Infrared burner RADIANT BURNER RADIANT BURNER SYMPTOM POSSIBLE CAUSE Burner flame too yellow 1 Orifice incorrect size or dirty 2 Air shutter not adjusted correctly or dirt...