Vulcan-Hart VHX24E Blowdown/Drain, Steam Solenoid Valve, Compartment Pressure Switch

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VHX SERIES STEAMER - ELECTRICAL OPERATION

Supply Voltage Transformer . . . . Provides 120VAC to the boiler control and cooking compartment control circuits.

Cycling Contactors B & D . . . . . . Supplies line voltage to one side of heating elements thru cycling pressure switch N.C. contacts and LLCO-1 N.O. contacts.

Auxiliary Contactors A & C . . . . . Supplies line voltage to energize the heating elements thru relay K3 & K4 N.O. contacts.

Heating Elements . . . . . . . . . . . . . Heats water in boiler to generate steam.

Blowdown/Drain

Solenoid Valve . . . . . . . . . . . . . . . N.O. valve that closes when energized by the power switch to allow boiler to fill and pressurize. When de-energized, valve opens to blowdown and drain the boiler contents.

COOKING COMPARTMENT CONTROLS

The upper section of the steamer consists of two separate cooking compartments. Each compartment functions independently with its own set of controls. Power is supplied to the controls only after the steam pressure rises above the compartment pressure switch setting to close the N.O. contacts.

Ready Light (Green)

When lit, indicates steamer is ready to cook.

Cooking Light (Red)

When lit, indicates steamer is in a cooking cycle.

Cooking Timer

Use to set cooking time between 0-60 minutes. When timer is set, energizes

 

the steam solenoid valve to allow steam into the cooking compartment.

 

When time expires, energizes buzzer until turned off.

Buzzer

Signals end of a cook cycle, must be turned off manually.

Door Switch

Removes power to cooking timer. If time is dialed on cooking timer and

 

compartments are steaming, removes power to steam solenoid valve when

 

compartment door is opened.

Steam Solenoid Valve

When energized, opens to allow steam into the cooking compartment

 

(normally closed valve).

Compartment Pressure Switch . .

Supplies power to cooking compartment controls, after steam pressure rises

 

above approximately 3 psi to close the pressure switch. The pressure switch

 

remains closed as long as steam pressure is above the stated pressure.

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F25154 (February 2004)

 

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Contents VHX24E Shown VHX Boiler Base Series High Efficiency Electric SteamerTable of Contents VHX Series Steamers General INSTALLATION, Operation Cleaning IntroductionModel Number of Pans PAN Depth PER Compartment Inches Water Conditioning SpecificationsBoiler Code Descriptions Boiler PressureElectrical ToolsStandard SpecialPressure Switch Control BOX Components Removal and Replacement of PartsMain Control BOX Components Left Side View Shown Water Level Gauge AssemblyHeating Elements Heating Elements Heating Element Mounting PlateRight Side View Shown Boiler AssemblyDescaler Cathodic Protector Removal Cooking Compartment DoorsGasket HandleLatch Assembly Boiler Service Procedures and AdjustmentsWater Level Controls Test Water Level Probe Housing BlowdownMain Water Level Control Auxiliary Low level Cut-Off Control Cycling Pressure Switch Adjustment Boiler Fill and Cold Water Condenser Solenoid Valves High Limit Pressure Switch AdjustmentCold Water Condenser Thermostat Adjustment Heating Element Test Intake Shut-Off Valve Adjustment Steam Flow Cooking Compartment Door Latch Adjustment Door Sealing AdjustmentElectrical Operation Reset Switch ManualComponent Function Cold Water CondenserBlowdown/Drain Compartment Pressure SwitchSteam Solenoid Valve Boiler Base Controls Component LocationsBoiler Base Controls Cooking Compartment Controls Low Level Cut-Off & Differential Control Water Level ControlsAuxiliary Low Level Cut-Off Relay Board Layout, Legend & Diagnostic Test PointsSchematic Initial Fill and Preheat Sequence of OperationBoiler Blowdown/drain Water Refill After Initial FillVHX Series Steamer Electrical Operation Schematics Cooking Compartment Controls Wiring Diagrams VHX Series Steamer Electrical Operation Heating Element Circuits Cooking Compartment Controls Symptom Possible Causes TroubleshootingBoiler Base Controls Symptom Possible Causes Symptom Possible Causes Cooking Compartment Controls VHX Series Steamer VHX Series Steamer VHX24E, VHX24E5, MHB24E Condensed Spare Parts ListPart Number Description
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