Vulcan-hart GHF91G ML-135503 Manuel d'utilisateur Page 1

– 1 –SERVICE MANUALGHF SERIES HEAVY DUTYRANGE MATCHING GASFRYERS & FRYMATESMODELSGHF91G ML-135503GHF90G ML-135504- NOTICE -This manual is prepared

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

– 11 –3. Turn on the gas and light the pilot as outlinedunder Lighting Pilot in General.4. Turn the combination valve to ON.5. Set the thermostat so t

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

– 13 –SCHEMATICCOMPONENT FUNCTIONThermostat - Millivolt type with capillary bulb, single-throw break on temperature rise. Temperature range of 200°Fto

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

– 15 –SYMPTOM4. Leaking tank.TROUBLESHOOTINGPOSSIBLE CAUSEA. Foam-over by depleted shortening permitsoil to drip from the tank surface, giving theappe

– 16 –FORM 35618 (11-04) PRINTED IN U.S.A.NOTES

– 2 –© VULCAN-HART, 2004TABLE OF CONTENTSGENERAL ...

– 3 –INTRODUCTIONModelsThis service manual was written for:GHF91G Gas Fryers and GHF90G Gas Frymates.INSTALLATIONGenerally, installations are made by

– 4 –COVERS AND PANELSWARNING: SHUT OFF THE GAS BEFORESERVICING.Door1. Open door and using a 5/16" wrench or ratchet,remove (2) screws securing

– 5 –THERMOSTATWARNING: SHUT OFF THE GAS BEFORESERVICING.1. Drain shortening from fry tank.2. Remove left burner as outlined under Burners.3. Remove

– 6 –7. Pull the high limit bulb through the undersideof the fry tank and remove the high limitassembly.8. Reverse the procedure to install. Wheninsta

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

– 8 –FRY TANKWARNING: SHUT OFF THE GAS BEFORESERVICING.WARNING: ALL GAS JOINTS DISTURBED DURINGSERVICING MUST BE CHECKED FOR LEAKS.CHECK WITH SOAP A

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