Manuals / Vulcan-Hart / Household Appliance / Boiler

Vulcan-Hart VL2GMS, VL3GMS, VL3GAS, VL2GAS, VL2GSS Electro Mechanical - Auxiliary Low Level Cut-Off

Models: VL2GPS VL3GPS VL3GSS VL2GSS VL2GAS VL3GAS VL2GMS VL3GMS

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Electro Mechanical - Auxiliary Low Level Cut-Off

VL SERIES STEAMER - ELECTRICAL OPERATION

Electro Mechanical - Auxiliary Low Level Cut-Off

This control serves as a safety backup to the main low level cut-off (LLCO) control to meet Cal-Code requirements. The operation of the auxiliary control is identical to the main low level cut-off control but performs a single function: 1) Provide auxiliary low level cut-off protection to shut off the heat source in case the water level drops below the low level cut-off (LLCO) probe. A single LLCO probe identical to the LLCO probe on the main low level cut-off control is connected to the auxiliary control.

The auxiliary control is powered by input voltage (120VAC) on terminals 1 and 2 which also connect to the primary side of the internal transformer. The transformer secondary winding (300 VAC) will provide power to the internal contactor coil through a series path going from one side of the secondary winding, through the contactor coil, through the water level control probe, through the water in the boiler and to the boiler for ground. The other side of the transformer secondary is attached to ground.

When the main power switch is turned ON, the auxiliary low level control is energized but no switching occurs.

When the water level reaches the low level cut-off (LLCO) probe, the internal contactor coil on the low level control is energized, closing the contacts on terminals 7 & 8. The internal contactor coil will remain energized until the water level in the boiler drops below the LLCO probe.

When the boiler stops filling, press the manual reset button on the boiler control box. This closes and locks the manual reset switch contacts to energize the heat source auxiliary control.

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Vulcan-Hart VL2GMS, VL3GMS, VL3GAS, VL2GAS, VL2GSS, VL3GSS, VL3GPS, VL2GPS Electro Mechanical - Auxiliary Low Level Cut-Off

Contents

SERVICE MANUAL VL BOILER BASE SERIES CONVECTION STEAMERSTABLE OF CONTENTS Wiring Diagrams, Gas Steamers, Boiler Controls Schematics, Gas Steamers, Boiler ControlsSchematics, Electric Steamers, Boiler Controls Wiring Diagrams, Electric Heater CircuitsWATER CONDITIONING GENERALINTRODUCTION TOOLS SPECIFICATIONSStandard SpecialGas Steamers VL SERIES STEAMERS - GENERALElectric Steamers Page 6 ofGas Powered Steam Boiler STEAMER OPERATIONElectrically Powered Steam Boiler Regenerated Steam Powered BoilerBoiler Blowdown and Steamer Shut off Direct Steam Powered Cooker3.Automatic blowdown 4.Manual blowdown3. Automatic 2. Standard4.Prevent CABINET BASE BOILER CONTROLS COMPONENT FUNCTIONHandhole Cover Assembly COOKING COMPARTMENT CONTROLS COMPONENT LOCATIONS REMOVAL AND REPLACEMENT OF PARTSPage 15 of Prevent CYCLING AND HIGH LIMIT PRESSURE SWITCHES WATER LEVEL GAUGE ASSEMBLYGAS AND ELECTRIC MODELS Solid StateHIGH LIMIT THERMOSTAT BOILER ASSEMBLYGAS COMBINATION CONTROL VALVE PILOT AND THERMOCOUPLE ASSEMBLY GAS MODELSDoor and Bushing GasketDoor Screw Nut STEAM COIL HEATER CONTACTORSHEATING ELEMENTS REGENERATED STEAM MODELSBOILER SERVICE PROCEDURES AND ADJUSTMENTSDescaler Deliming Only Models with Deliming Port AssemblyWATER LEVEL CONTROLS TEST Water Level Probes CYCLING AND HIGH LIMIT PRESSURE SWITCHESGAS AND ELECTRIC MODELS Disassembly COMPARTMENT PRESSURE ADJUSTMENTFILL AND COLD WATER SOLENOID VALVES HIGH LIMIT THERMOSTAT BOILER NOT FILLING WITH WATERBOILER BLOWDOWN DRAIN SOLENOID VALVE A. Newer Models BOILER SLOW TO PRESSURIZEB.Older Models 1.All Models With BoilerPILOT AND THERMOCOUPLE ASSEMBLY GAS MODELS INLET WATER STRAINER3.Electric Models 4.Direct Steam ModelsPage 30 of “PILOT AND THERMOCOUPLE ASSEMBLY GAS MODELS” inCheck the thermocouple output voltage as follows AUTOMATIC IGNITION SYSTEMS GAS MODELS GAS BURNERSAir Shutter Adjustment InspectionSpark Ignition Control Test TerminalsGAS MANIFOLD PRESSURE ADJUSTMENT REGENERATED STEAM OLDER MODELS DIRECT STEAM MODELSHEATER CONTACTORS HEATING ELEMENTSNUMBER WATER LEVEL GAUGE ASSEMBLY THERMAL SWITCH - PREVENT AND AUTOMATIC MODELS1.Newer Models 2.Older ModelsSTEAM GATE VALVES WATER LEVEL CONTROLS ELECTRICAL OPERATIONSolid State - Auxiliary Low Level Cut-Off VL SERIES STEAMER - ELECTRICAL OPERATION Electro Mechanical - Auxiliary Low Level Cut-Off GAS MODELS SEQUENCE OF OPERATIONA.Power to terminal 6 on water level control A.Power to terminal 9 on the water level controlVL SERIES STEAMER - ELECTRICAL OPERATION 4.Water reaches LL low level probeWater Refill After Initial Fill Cook CycleINITIAL FILL AND PREHEAT ELECTRIC MODELSBoiler Blowdown/drain COOK CYCLE BOILER BLOWDOWN/DRAIN WATER REFILL AFTER INITIAL FILLPage 48 of PAGE PURPOSELY LEFT BLANKVL SERIES STEAMER - ELECTRICAL OPERATION Manual Ignition, Standard Controls SCHEMATICS, GAS STEAMERS, BOILER CONTROLSPage 50 of VL SERIES STEAMER - ELECTRICAL OPERATIONElectronic Ignition, Standard Controls Page 51 of VL SERIES STEAMER - ELECTRICAL OPERATIONManual Ignition, CSD-1Code Controls Page 52 of VL SERIES STEAMER - ELECTRICAL OPERATIONElectronic Ignition, CSD-1Code Controls Page 53 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 54 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 55 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 56 of VL SERIES STEAMER - ELECTRICAL OPERATIONElectronic Ignition, Standard Controls Page 57 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 58 of VL SERIES STEAMER - ELECTRICAL OPERATIONManual Ignition, CSD-1Code Controls Page 59 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 60 of VL SERIES STEAMER - ELECTRICAL OPERATIONElectronic Ignition, CSD-1Code Controls Page 61 of VL SERIES STEAMER - ELECTRICAL OPERATIONAuto Blowdown, Standard Controls SCHEMATICS, ELECTRIC STEAMERS, BOILER CONTROLSPage 63 of VL SERIES STEAMER - ELECTRICAL OPERATIONAuto Blowdown, Cal-CodeControls Page 64 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 65 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 66 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 67 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 68 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 69 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 70 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 71 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 72 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 73 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 74 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 75 of VL SERIES STEAMER - ELECTRICAL OPERATIONStandard and Cal-Code/CSD-1Controls WIRING DIAGRAMS, ELECTRIC HEATER CIRCUITSPage 77 of VL SERIES STEAMER - ELECTRICAL OPERATIONPage 78 of VL SERIES STEAMER - ELECTRICAL OPERATIONManual Blowdown Older Models Page 79 of VL SERIES STEAMER - ELECTRICAL OPERATIONAuto Blowdown Older Models Page 80 of VL SERIES STEAMER - ELECTRICAL OPERATIONPrevent Page 81 of VL SERIES STEAMER - ELECTRICAL OPERATIONAutomatic Page 82 of VL SERIES STEAMER - ELECTRICAL OPERATIONStandard Page 83 of VL SERIES STEAMER - ELECTRICAL OPERATIONManual SYMPTOM TROUBLESHOOTINGALL MODELS POSSIBLE CAUSESPOSSIBLE CAUSES SYMPTOMVL SERIES STEAMER - TROUBLESHOOTING POSSIBLE CAUSES SYMPTOMVL SERIES STEAMER - TROUBLESHOOTING POSSIBLE CAUSES GAS MODELS ONLYSYMPTOM VL SERIES STEAMER - TROUBLESHOOTING