Vulcan-Hart EF4 ML-114943 Manuel de service

– 1 –SERVICE MANUALVULCAN-HART COMPANY, P.O. BOX 696, LOUISVILLE, KY 40201-0696, TEL. (502) 778-2791FORM 31208 (Apr. 2002) www.vulcanhart.co

– 10 –SERVICE PROCEDURES AND ADJUSTMENTSMILLIVOLT CONTROLS TEST1. Verify proper gas (natural or propane) ispresent.2. Check for correct wiring and sec

– 11 –5. Allow temperature to stabilize at new settingand compare temperature tester to dial setting.Recalibrate if the temperature does not fallwithi

– 12 –2. Remove the plug from the submanifold andinstall pressure gauge at this point.3. Turn on the gas and light the pilot as outlinedunder Lighting

– 13 –3. Total Shutdown.A. When the high limit trips, 0.0 millivoltswill read across both coils of thecombination valve, causing both valvesto close.B

– 14 –MVREDWHTTHERMOSTATLIMIT2341PL-56159SCHEMATICCOMPONENT FUNCTIONThermostat - Millivolt type with capillary bulb, single-throw break on temperature

– 15 –TROUBLESHOOTINGSYMPTOM1. The temperature of the shortening drops,or excessive recovery time is required.POSSIBLE CAUSEA. Insufficient gas supply

– 16 –FORM 31208 (Apr. 2002) PRINTED IN U.S.A.SYMPTOM4. Leaking tank.TROUBLESHOOTINGPOSSIBLE CAUSEA. Foam-over by depleted shortening permitsoil to dr

– 2 –© VULCAN-HART COMPANY, 2002TABLE OF CONTENTSGENERAL ...

– 3 –NOTE: If pilot does not remain lit, repeat steps 2through 5, but allow a longer period of time beforereleasing the combination valve knob. Adjust

– 4 –COVERS AND PANELSWARNING: SHUT OFF THE GAS BEFORESERVICING.Door and Front Panel1. Open door and remove screws from frontpanel.2. Hold door. Lift

– 5 –3. Push burner up while pulling the bottom of theburner forward to clear the burner nozzle.4. Reverse the procedure to install.THERMOSTATWARNING:

– 6 –7. Loosen the packing nut and holding nut.8. Remove the thermostat bulb from the clamp.9. Pull the thermostat bulb through the undersideof the fr

– 7 –6. Loosen the packing nut and the holding nut.7. Remove the high limit bulb from the clamp.8. Pull the high limit bulb through the undersideof th

– 8 –6. Remove thermopile from pilot bracket.7. Reverse procedure to install.PILOT ORIFICEWARNING: SHUT OFF THE GAS BEFORESERVICING.WARNING: ALL GAS

– 9 –5. Remove screws holding fry tank.6. Remove burners as outlined under Burners.7. Remove the manifold bracket from the tankassembly.8. Remove ther