Vulcan-Hart MHB24G, VHX24G5 manual Boiler Blowdown Steamer Shut OFF

Page 9

VHX SERIES STEAMERS - OPERATION

1.With both timer knobs at the off position, open the compartment doors and observe that no steam has entered the cooking compartments, then close the doors.

2.Set both timer knobs at 2 minutes. The ready lights will go off, the cooking lights will come on, and steam will begin to enter the compartments.

3.After one minute, open each door and observe that steam has ceased to enter each compartment, cooking lights go back to ready, and one minute is remaining on each cook timer.

4.Close doors and steam generation and cook timing will resume. Observe the floor drain to ensure that live steam from compartments is being cooled by cold water from the cold water condenser solenoid valve.

5.When timer knobs reach "0", buzzers will sound, steam generation will cease, cooking lights will go off and ready lights will come on. To silence buzzers, turn timer knobs to off position.

6.During idle time or a cooking cycle, the heating system will cycle on and off as necessary to maintain steam pressure in the boiler.

7.Turn power switch off to remove power from the steamer.

BOILER BLOWDOWN AND

STEAMER SHUT OFF

Turn the steamer off at least once daily to blowdown the boiler. This will aid in the removal of sediment and scale build-up in the boiler.

NOTE: Boiler should be with-in normal operating pressures.

1.Turn power switch OFF.

2.Boiler blowdown sequence starts.

A.The blowdown/drain solenoid valve will be de-energized and the boiler will begin to drain.

B.The cold water condenser solenoid will operate, as needed, to condense steam and to cool the water going into the drain.

A.Boiler blowdown starts.

Page 9 of 68

 

F24700 (October 2001)

 

Image 9
Contents VHX24G Shown VHX Boiler Base Series High Efficiency GAS SteamersTable of Contents VHX Series Steamers Installation Maintenance Cleaning IntroductionGeneral Boiler Control Styles System Water Conditioning SpecificationsWater Supply ElectricalGas Supply ToolsStandard SpecialCabinet Base Boiler Steamer OperationCooking Compartment Controls VHX Series Steamers OperationBoiler Blowdown Steamer Shut OFF VHX Series Steamers Component Function Component FunctionBlowdown/Drain Ignition Control ModuleWater Level Steam Header AssemblyWater Inlet Valve manual Pressure Relief ValveSteam Solenoid Valve Compartment Pressure SwitchManifold Pressure Gauge Steam Supply ManifoldVHX Series Steamers Removal and Replacement of Parts Removal and Replacement of PartsComponent Locations Cabinet Base Boiler ControlsCabinet Base Boiler Controls Water Level Controls Main or Auxiliary Llco Relay BoardCooking Compartment Controls Water Level Gauge Assembly Pressure SwitchesBoiler Assembly Boiler Fill and Cold Water Condenser Solenoid Valves Pilot GAS Valve Main GAS ValveComplete Burner Assembly Burner Head AssemblyHeat Exchanger VHX Series Steamers Removal and Replacement of Parts Cooking Compartment Doors RemovalGasket Handle Latch AssemblyClean-Out Service Procedures and AdjustmentsBoiler InspectionDescaler Cathodic Protector Water Level Probe Housing BlowdownTest Water Level ControlsAuxiliary Low level Cut-Off Control Cycling High LimitSmall increments Fill and Cold Water Solenoid ValvesBoiler BLOWDOWN/DRAIN Solenoid Valve Inline Water Strainer CleaningMain Burner Ignition Checks Pressure Switch AdjustmentGAS Manifold Pressure Adjustment VHX Series Steamer Service Procedures and Adjustments AIR Pressure Switch Adjustment GAS Pilot Pressure Adjustment Pressure Readings Inches W.C GAS Manifold Pressure Adjustment Terminals Ignition Control Module ChecksSpark Verification Test Door Sealing Adjustment Intake Shut-Off Valve Adjustment Steam FlowCooking Compartment Cooking Compartment DoorsVHX Series Steamer Electrical Operation Door Latch AdjustmentLow Level Cut-Off & Differential Control Electrical OperationAuxiliary Low Level Cut-Off LED Legend Board Layout and LED LegendReset Engaged State C Boiler Operational Status LED IndicatorInitial Conditions State a Aux Water Level Satisfied State BK32 Close Air Pressure Switch Satisfied State DK51 Close Burner ON, Boiler Heating to generate steam State ENEW Style Controls Boiler Sequence of OperationInitial Fill and Preheat HL-LEDN14, N16, N17 go out N9, N10, N11, N12, N13 go outBoiler Blowdown/drain Water Refill After Initial FillVHX Series Steamer Electrical Operation Cooking Compartment Controls This page Intentionally Left Blank Models Built After 5/25/00 New Style Boiler Controls SchematicsVHX Series Steamer Electrical Operation Models Built Before 5/25/00 Old Style Boiler Controls Cooking Compartment Controls Wiring Diagrams VHX Series Steamer Electrical Operation Models Built Before 5/25/00 Old Style Boiler Controls VHX Series Steamer Electrical Operation Cooking Compartment Controls Troubleshooting VHX Series Steamer TroubleshootingBoiler Base Controls Symptom Possible Causes Adjustments Boiler blowdown solenoid valve clogged and not fully closing Boiler Base Procedures and Adjustments VHX Series Steamer Condensed Spare Parts List VHX Series Steamer Condensed Spare Parts ListNEW Style Controls only VHX24G, VHX24G5, MHB24G