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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
SERVICE MANUAL
LG Series Fryer
LG300
LG400
LG500
- NOTICE -
3600 North Point Blvd Baltimore, MD 21222
ML-136528
ML-136622
ML-136643
F45691 (1117)
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Summary of Contents for Vulcan-Hart LG300
- 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 F45691 (1117)
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Page 2: Table Of Contents
LG Series Fryer TABLE OF CONTENTS GENERAL ....................3 INTRODUCTION . -
Page 3: General
Meter leads must also be rated at CAT III 600V. • Temperature tester (thermocouple type). • ESD (Electrostatic discharge) Protection Kit. Special • Manometer. SPECIFICATIONS Gas Data Model No. Tubes BTU/HR LG300 90,000 LG400 120,000 LG500 150,000 Page 3 of 23 F45691 (1117) -
Page 4: Removal And Replacement Of Parts
LG Series Fryer - REMOVAL AND REPLACEMENT OF PARTS REMOVAL AND REPLACEMENT OF PARTS COVER PANELS Door Be prepared to catch door when bottom hinge is removed. Remove door hinge screws while supporting door. Fig. 3 Reverse procedure to install. Back Panel Remove rear panel mounting screws. -
Page 5: Burners
LG Series Fryer - REMOVAL AND REPLACEMENT OF PARTS Fig. 7 Push up on burner while pulling bottom of burner forward to clear burner nozzle. Fig. 5 Reverse procedure to install. Reverse procedure to install. Flue Box THERMOSTAT Remove FLUE WRAP. Remove screws securing flue box. -
Page 6: High Limit Thermostat
LG Series Fryer - REMOVAL AND REPLACEMENT OF PARTS Fig. 10 Remove thermostat bulb from clamp. Fig. 8 Remove thermostat mounting screws (Fig. 8) and bracket. Fig. 11 Note and disconnect thermostat wiring. Remove thermostat assembly. 10. Reverse procedure to install. Take care not to kink thermostat capillary when installing. -
Page 7: Thermopile
LG Series Fryer - REMOVAL AND REPLACEMENT OF PARTS Loosen packing nut (1,Fig. 14 ) and remove holding nut (2, ). Fig. 14 Fig. 12 Reverse procedure to install. Note wires and disconnect. Check for leaks. THERMOPILE Shut off the gas before servicing the unit and follow lockout / tagout procedures. -
Page 8: Pilot
LG Series Fryer - REMOVAL AND REPLACEMENT OF PARTS Fig. 15 Note and disconnect thermopile to high limit switch wiring. Fig. 17 Remove thermopile from bracket. Reverse to install. PILOT Shut off the gas before servicing the unit and follow lockout / tagout procedures. -
Page 9: Pilot Orifice
LG Series Fryer - REMOVAL AND REPLACEMENT OF PARTS Fig. 18 Remove pilot nut at bottom of pilot assembly. Fig. 20 Reverse procedure to install. PILOT ORIFICE Shut off the gas before servicing the unit and follow lockout / tagout procedures. -
Page 10: Combination Valve
LG Series Fryer - REMOVAL AND REPLACEMENT OF PARTS COMBINATION VALVE Shut off the gas before servicing the unit and follow lockout / tagout procedures. All gas joints disturbed during servicing must be checked for leaks. Check with a soap and water solution (bubbles). -
Page 11: Fry Tank
LG Series Fryer - REMOVAL AND REPLACEMENT OF PARTS DRAIN FRYER TANK . Remove HEAT SHIELD. Remove FLUE WRAP. Remove FLUE BOX. Remove BACK PANEL. Remove BURNERS and manifold bracket (Fig. 26). Fig. 26 Remove THERMOSTAT. 10. Remove HIGH LIMIT THERMOSTAT. 11. -
Page 12: Service Procedures And Adjustments
LG Series Fryer - SERVICE PROCEDURES AND ADJUSTMENTS SERVICE PROCEDURES AND ADJUSTMENTS TURNING FRYER OFF LIGHTING PILOT Turn thermostat off. Before lighting pilot make sure tank is filled with liquid shortening. Make sure gas supply to the fryer is on. Turn thermostat off. -
Page 13: Drain Fryer Tank
LG Series Fryer - SERVICE PROCEDURES AND ADJUSTMENTS While still holding knob in, light the pilot with a flame. Continue to depress knob until pilot remains lit (approximately 30 seconds), then release knob. Depress and turn gas control valve knob to ON. NOTE: If gas supply is interrupted, repeat all steps. -
Page 14: Thermostat Calibration
LG Series Fryer - SERVICE PROCEDURES AND ADJUSTMENTS • If voltage is less than 500 millivolts, Allow temperature to stabilize and recheck replace thermopile. temperature. Repeat until the temperature falls within the limits as stated in step 3 under • If voltage is 500 millivolts or more, Thermostat Calibration - Check. -
Page 15: Burners, Nozzles And Orifices
LG Series Fryer - SERVICE PROCEDURES AND ADJUSTMENTS If main burners do not light or pilot burner goes out, proceed to MILLIVOLT CONTROLS TEST. BURNERS, NOZZLES AND ORIFICES Shut off the gas before servicing the unit and follow lockout / tagout procedures. -
Page 16: Combination Valve Regulator Adjustment
LG Series Fryer - SERVICE PROCEDURES AND ADJUSTMENTS Reverse procedure to install new burner, nozzle and orifice. COMBINATION VALVE REGULATOR ADJUSTMENT Shut off the gas before servicing the unit and follow lockout / tagout procedures. NOTE: Accurate gas pressure adjustments can only be made with gas on and burner lit. -
Page 17: Extended Shut-Down
LG Series Fryer - SERVICE PROCEDURES AND ADJUSTMENTS Fig. 39 • Counterclockwise to decrease pressure. • Clockwise to increase pressure. Install cap and check for proper operation. EXTENDED SHUT-DOWN Oil may be hot. Turn thermostat off. Push pilot knob in and turn to OFF. DRAIN FRYER TANK . -
Page 18: Diagrams
LG Series Fryer - DIAGRAMS DIAGRAMS SCHEMATIC Fig. 40 NOTE: High limit shown tripped. F45691 (1117) Page 18 of 23... -
Page 19: Wiring Diagram
LG Series Fryer - DIAGRAMS WIRING DIAGRAM Fig. 41 Page 19 of 23 F45691 (1117) -
Page 20: Electrical Operation
LG Series Fryer - ELECTRICAL OPERATION ELECTRICAL OPERATION Total Shutdown CONTROL SYSTEM DESCRIPTION When high limit trips, 0.0 millivolts will read across both coils of the combination valve, The thermopile (TH) provides total control causing both valves to close. voltage for this system. Pilot relight cannot be accomplished until oil One side of thermopile is connected to cools sufficiently to allow high limit to close. -
Page 21: Component Function
LG Series Fryer - ELECTRICAL OPERATION COMPONENT FUNCTION Thermostat ... Millivolt type with capillary bulb, single-throw break on temperature rise. Temperature range of 200°F to 400°F. Thermopile ... Millivolt control with 24"... -
Page 22: Troubleshooting
LG Series Fryer - TROUBLESHOOTING TROUBLESHOOTING TROUBLESHOOTING SYMPTOM CAUSE REMEDY Insufficient gas supply to unit. Adjust gas supply at gas Ventilation system pulling heat combination valve. out of heat exchanger and flue The temperature of shortening drops, box. Relocate fryer. or excessive recovery time is required. -
Page 23: Vulcan
LG Series Fryer - TROUBLESHOOTING SYMPTOM CAUSE REMEDY Foam-over by depleted Replace shortening. shortening permits oil to drip from the tank surface, giving Gas control valve knob should appearance of leaking. be in PILOT or OFF position Leaking tank. before draining oil. Burners Careless draining procedures.
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