Vulcan-Hart VHX24E service manual Relay Board, Layout, Legend & Diagnostic Test Points

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VHX SERIES STEAMER - ELECTRICAL OPERATION

RELAY BOARD

Layout, Legend & Diagnostic Test Points

The relay board provides a centralized location for wire harness connections and power transfer through board relays (K1-K4) to the other steamer controls. Also, provides for condition or component troubleshooting by utilizing seven voltage test points (T1-T7) on the board to verify the voltage status for the condition or component in the operating sequence. When the condition for the component<s voltage measurement is satisfied or activated, 120VAC can be measured between T1 (ref.) and T2 thru T7 test points to indicate whether the condition or component is receiving voltage to energize and operate. If the voltage is not present, then the condition or component has not been energized or is not activated.

Page 31 of 48		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 Boiler Pressure SpecificationsWater Conditioning Boiler Code DescriptionsSpecial ToolsElectrical StandardPressure 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 Handle Cooking Compartment DoorsRemoval GasketLatch 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 FlowCooking Compartment Door Latch Adjustment Door Sealing AdjustmentCold Water Condenser Reset Switch ManualElectrical Operation Component FunctionBlowdown/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