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SERVICE MANUAL
EF SERIES STANDARD
AND FILTER-READY
GAS FRYERS
MODELS
EF3 ML-52099
EF4 ML-114943
EF5 ML-114944
NOTICE
THIS MANUAL IS PREPARED FOR THE USE OF TRAINED VULCAN SERVICE TECHNICIANS
AND SHOULD NOT BE USED BY THOSE NOT PROPERLY QUALIFIED. IF YOU HAVE ATTENDED
A VULCAN SERVICE SCHOOL FOR THIS PRODUCT, YOU MAY BE QUALIFIED TO PERFORM
ALL PROCEDURES DESCRIBED IN THIS MANUAL.
THIS MANUAL IS NOT INTENDED TO BE ALL-ENCOMPASSING. IF YOU HAVE NOT ATTENDED
A VULCAN SERVICE SCHOOL FOR THIS PRODUCT
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TABLE OF CONTENTS GENERAL .............................................................................................................................................................. 3 Introduction ............................................................................................................................................... 3 Installation .............................................................................................................................................
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GENERAL NOTE: If pilot does not remain lit, repeat steps 2 INTRODUCTION through 5, but allow a longer period of time before releasing the combination valve knob. Adjust pilot flame, if necessary, as outlined under Pilot Adjustment Models in Service Procedures and Adjustments. This service manual was written for: 6. Turn combination valve knob to ON. EF3, EF4 and EF5 Gas Fryers. SPECIFICATIONS INSTALLATION Gas Data Generally, installations are made by the dealer or contracted by the dealer or own
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REMOVAL AND REPLACEMENT OF PARTS COVERS AND PANELS WARNING: SHUT OFF THE GAS BEFORE SERVICING. Door and Front Panel 1. Open door and remove screws from front panel. 2. Remove heat shield. BURNERS WARNING: SHUT OFF THE GAS BEFORE SERVICING. 1. Remove heat shield as outlined under Cover and Panels. 2. Loosen the two mounting bolts at the top of 2. Hold door. Lift up and remove front panel. each burner. 3. Lift door off bottom hinge. 4. Reverse procedure to install. Heat Shield 1. Remove screws hol
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3. Push burner up while pulling the bottom of the 5. Remove thermostat mounting screws and burner forward to clear the burner nozzle. remove thermostat from mounting bracket. 4. Reverse the procedure to install. 6. Remove wire leads from the rear of the thermostat, noting all connections for reassembly. THERMOSTAT WARNING: SHUT OFF THE GAS BEFORE SERVICING. 1. Drain shortening from fry tank. 2. Remove heat shield as outlined under Covers and Panels. 3. Remove left burner as outlined under Burne
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7. Loosen the packing nut and holding nut. HIGH LIMIT WARNING: SHUT OFF THE GAS BEFORE SERVICING. 1. Drain shortening from fry tank. 2. Remove heat shield as outlined under Covers and Panels. 3. Remove wire leads from high limit, noting all connections for reassembly. 8. Remove the thermostat bulb from the clamp. 4. Remove high limit from mounting bracket. 5. Remove left burner as outlined under Burners. 9. Pull the thermostat bulb through the underside of the fry tank and remove the thermostat
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6. Loosen the packing nut and the holding nut. 2. Disconnect thermopile lead wires as outlined under High Limit. 3. Remove burners as outlined under Burners. 4. Remove pilot tubing from pilot. 7. Remove the high limit bulb from the clamp. 5. Remove screws holding pilot bracket. 8. Pull the high limit bulb through the underside of the fry tank and remove the high limit assembly. 9. Reverse the procedure to install. When installing the new high limit assembly, do not kink the high limit capillary.
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6. Remove thermopile from pilot bracket. COMBINATION VALVE WARNING: SHUT OFF THE GAS BEFORE SERVICING. WARNING: ALL GAS JOINTS DISTURBED DURING SERVICING MUST BE CHECKED FOR LEAKS. CHECK WITH SOAP AND WATER SOLUTION (BUBBLES). DO NOT USE AN OPEN FLAME. 1. Disconnect fryer from main gas supply. 2. Remove heat shield as outlined under Covers and Panels. 3. Remove right burner as outlined under Burners. 4. Disconnect lead wires from combination valve and mark for reconnecting. 5. Disconnect pilot
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6. Disconnect combination valve union (Fig.1) 5. Remove screws holding fry tank. and pressure fitting (Fig. 2). 6. Remove burners as outlined under Burners. 7. Remove the manifold bracket from the tank assembly. Fig.1 Fig. 2 7. Remove the combination valve from the fryer. 8. Reverse procedure to install. FRY TANK 8. Remove thermostat and high limit as outlined under Thermostat and High Limit. WARNING: SHUT OFF THE GAS BEFORE SERVICING. 9. Remov
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SERVICE PROCEDURES AND ADJUSTMENTS 7. Turn combination valve to ON. Turn MILLIVOLT CONTROLS TEST thermostat to a setting higher than the shortening temperature. 1. Verify proper gas (natural or propane) is present. A. If the voltage measures 150 millivolts or more but the burners do not ignite, replace 2. Check for correct wiring and secure the combination valve. connections. B. If the voltage is less than 150 millivolts, 3. Verify the pilot flame is adjusted properly as measure the voltage betw
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5. Allow temperature to stabilize at new setting BURNERS, NOZZLES AND ORIFICES and compare temperature tester to dial setting. Recalibrate if the temperature does not fall within the range of 330°F to 370°F. WARNING: SHUT OFF THE GAS BEFORE SERVICING. 6. If the temperature does not fall within the limits at both settings, replace the thermostat. Burners If the burner ports become clogged, the fryer will not PILOT ADJUSTMENT operate properly. If the burner is cracked, it must be replaced. 1. Ligh
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2. Remove the plug from the submanifold and COMBINATION VALVE REGULATOR install pressure gauge at this point. ADJUSTMENT WARNING: SHUT OFF THE GAS BEFORE SERVICING. Accurate gas pressure adjustments can only be made with the gas on and the burner lit. If the incoming line pressure to the valve is less than the minimum stated, then the pressure cannot be set correctly. The combination valve is preadjusted for natural or propane gas as specified on the rating plate. The natural gas rating is 4" W
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ELECTRICAL OPERATION 3. Total Shutdown. CONTROL SYSTEM DESCRIPTION A. When the high limit trips, 0.0 millivolts 1. The thermopile (TP) provides the total control will read across both coils of the voltage for this system. combination valve, causing both valves to close. A. One side of the thermopile is connected to the common (C) of the high limit (HL). B. Pilot relight cannot be accomplished until oil cools sufficiently to allow high limit to B. The other side of the thermopile is close. conn
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SCHEMATIC M V W R H E THERMOSTAT T D 1 2 3 LIMIT 4 PL-56159 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" capillary. Rated to generate 500 millivolts. Combination Valve - Regulates gas flow to burner and pilot. Provides pilot safety. Hi-Limit - Prevents overheating of fryer in the event of thermostat failure. Opens at 465°F and automatically resets at 415°F.
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TROUBLESHOOTING POSSIBLE CAUSE SYMPTOM 1. The temperature of the shortening drops, A. Insufficient gas supply to unit. or excessive recovery time is required. B. Ventilating system pulling heat out of heat exchanger and flue box. C. Overloading fryer capacity. 2. Pilot won't stay lit. Fryer shut off. A. Malfunctioning thermopile or loose/dirty connection in thermopile. B. Malfunctioning shutoff valve. C. Pilot burner orifice and air openings need cleaning. A. Excessive temperature settings (over
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TROUBLESHOOTING SYMPTOM POSSIBLE CAUSE 4. Leaking tank. A. Foam-over by depleted shortening permits oil to drip from the tank surface, giving the appearance of leaking. B. Careless draining procedures. Gas valve should be in the PILOT or OFF position before draining oil. Burners heating an empty tank will damage tank joints. C. Carbon buildup causes rapid attack on tank by promoting acid formulation. 5. Pilot burner flames adjusted properly, but A. Check gas pressure at submanifold fitting on fl
