Vulcan-Hart MHB24E, ML-126857, ML-126853, VHX24E5, ML-126852 manual Main Control BOX Components

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VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS

4)Disconnect lead wires from other components as necessary then remove pressure switch mounting panel.

5)Remove screws securing switch to panel.

B.High limit pressure switch.

1)Disconnect compression fittings from switch then remove from box.

C.Boiler fill or cold water condenser valve.

1)Turn water supply off and disconnect compression fittings from valve.

2)Remove valve bracket mounting screws.

D.Main or auxiliary water level control board

1)Compress locking tab on the board mounting standoffs and remove control board.

5.Reverse procedure to install.

NOTE: Before installing the cycling pressure switch, use pressure scale on the switch to preset the approximate cut-out (off) and cut-in (on) set points.

A.Adjust the installed pressure switch (cycling or high limit) as outlined in

SERVICE PROCEDURES AND ADJUSTMENTS.

6.Check for proper operation.

MAIN CONTROL BOX

COMPONENTS

WARNING: DISCONNECT THE

ELECTRICAL POWER TO THE

MACHINE AND FOLLOW LOCKOUT /

TAGOUT PROCEDURES.

CAUTION: Certain components in this system are subject to damage by electrostatic discharge during field repairs. A field service grounding kit is available to prevent damage. The field service grounding kit must be used anytime a control board is handled.

1.Open the cabinet base door.

2.Remove heating element cover then main control box cover.

3.Disconnect lead wires from component being replaced.

F25154 (February 2004)		Page 8 of 48

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Contents VHX Boiler Base Series High Efficiency Electric Steamer VHX24E ShownTable of Contents VHX Series Steamers Model Number of Pans PAN Depth PER Compartment Inches INSTALLATION, Operation Cleaning IntroductionGeneral Specifications Water ConditioningBoiler Code Descriptions Boiler PressureTools ElectricalStandard SpecialRemoval and Replacement of Parts Pressure Switch Control BOX ComponentsMain Control BOX Components Water Level Gauge Assembly Left Side View ShownHeating Elements Heating Element Mounting Plate Heating ElementsBoiler Assembly Right Side View ShownDescaler Cathodic Protector Cooking Compartment Doors RemovalGasket HandleLatch Assembly Service Procedures and Adjustments BoilerMain Water Level Control Water Level Probe Housing BlowdownWater Level Controls Test Auxiliary Low level Cut-Off Control Cycling Pressure Switch Adjustment High Limit Pressure Switch Adjustment Boiler Fill and Cold Water Condenser Solenoid ValvesCold Water Condenser Thermostat Adjustment Cooking Compartment Intake Shut-Off Valve Adjustment Steam FlowHeating Element Test Door Sealing Adjustment Door Latch AdjustmentReset Switch Manual Electrical OperationComponent Function Cold Water CondenserSteam Solenoid Valve Compartment Pressure SwitchBlowdown/Drain Component Locations Boiler Base ControlsBoiler Base Controls Cooking Compartment Controls Water Level Controls Low Level Cut-Off & Differential ControlAuxiliary Low Level Cut-Off Layout, Legend & Diagnostic Test Points Relay BoardSchematic Sequence of Operation Initial Fill and PreheatWater Refill After Initial Fill Boiler Blowdown/drainVHX Series Steamer Electrical Operation Schematics Cooking Compartment Controls Wiring Diagrams VHX Series Steamer Electrical Operation Heating Element Circuits Cooking Compartment Controls Boiler Base Controls TroubleshootingSymptom Possible Causes Symptom Possible Causes Symptom Possible Causes Cooking Compartment Controls VHX Series Steamer VHX Series Steamer Part Number Description Condensed Spare Parts ListVHX24E, VHX24E5, MHB24E