Vulcan-Hart VHX24G5, MHB24G manual

VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS

12.For clearance of the heat exchanger only, remove the drain nut (petcock) and the lower adjustment knob from the water level gauge.

A.Remove the remaining bolts on the heat exchanger then pull heat exchanger straight out from the boiler.

13.To install heat exchanger:

A.Clean the mating surfaces on the heat exchanger and boiler.

B.Install a new gasket on the boiler side of the mounting flange.

C.Insert the heat exchanger back into the boiler and line up the mounting holes being careful not to disturb gasket.

D.Attach a 2" C-Clamp between the heat exchanger mounting flange and the boiler side mounting flange. Tighten clamp only enough to allow starting of bottom bolt into mounting hole.

F24700 (October 2001)		Page 20 of 68

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Vulcan-Hart VHX24G5, MHB24G manual VHX Series Steamers Removal and Replacement of Parts

Contents

VHX Boiler Base Series High Efficiency GAS Steamers VHX24G Shown Table of Contents VHX Series Steamers General InstallationMaintenance Cleaning Introduction Boiler Control Styles Water Conditioning Specifications SystemWater Supply Electrical Tools Gas SupplyStandard Special Steamer Operation Cabinet Base BoilerCooking Compartment Controls VHX Series Steamers Operation Boiler Blowdown Steamer Shut OFF Component Function VHX Series Steamers Component FunctionBlowdown/Drain Ignition Control Module Steam Header Assembly Water LevelWater Inlet Valve manual Pressure Relief Valve Compartment Pressure Switch Steam Solenoid ValveManifold Pressure Gauge Steam Supply Manifold Removal and Replacement of Parts VHX Series Steamers Removal and Replacement of PartsComponent Locations Cabinet Base Boiler Controls Cabinet Base Boiler Controls Cooking Compartment Controls Water Level Controls Main or Auxiliary LlcoRelay Board Boiler Assembly Water Level Gauge AssemblyPressure Switches Pilot GAS Valve Main GAS Valve Boiler Fill and Cold Water Condenser Solenoid Valves Burner Head Assembly Complete Burner Assembly Heat Exchanger VHX Series Steamers Removal and Replacement of Parts Gasket Cooking Compartment DoorsRemoval Latch Assembly Handle Service Procedures and Adjustments Clean-OutBoiler Inspection Water Level Probe Housing Blowdown Descaler Cathodic Protector Water Level Controls Test Auxiliary Low level Cut-Off Control High Limit Cycling Fill and Cold Water Solenoid Valves Small increments Inline Water Strainer Cleaning Boiler BLOWDOWN/DRAIN Solenoid Valve Pressure Switch Adjustment Main Burner Ignition Checks GAS 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 Ignition Control Module Checks Terminals Spark Verification Test Intake Shut-Off Valve Adjustment Steam Flow Door Sealing AdjustmentCooking Compartment Cooking Compartment Doors Door Latch Adjustment VHX Series Steamer Electrical Operation Electrical Operation Low Level Cut-Off & Differential Control Auxiliary Low Level Cut-Off Board Layout and LED Legend LED Legend Boiler Operational Status LED Indicator Reset Engaged State CInitial Conditions State a Aux Water Level Satisfied State B Air Pressure Switch Satisfied State D K32 CloseK51 Close Burner ON, Boiler Heating to generate steam State E Sequence of Operation NEW Style Controls BoilerInitial Fill and Preheat HL-LED N9, N10, N11, N12, N13 go out N14, N16, N17 go out Water Refill After Initial Fill Boiler Blowdown/drain VHX Series Steamer Electrical Operation Cooking Compartment Controls This page Intentionally Left Blank Schematics Models Built After 5/25/00 New Style Boiler Controls VHX 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 Boiler Base Controls TroubleshootingVHX Series Steamer Troubleshooting Symptom Possible Causes Adjustments Boiler blowdown solenoid valve clogged and not fully closing Boiler Base Procedures and Adjustments VHX Series Steamer NEW Style Controls only VHX24G, VHX24G5, MHB24G Condensed Spare Parts ListVHX Series Steamer Condensed Spare Parts List