Burner Head Assembly, Complete Burner Assembly | Vulcan-Hart MHB24G

VHX SERIES STEAMERS - REMOVAL AND REPLACEMENT OF PARTS

BURNER HEAD ASSEMBLY

WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

WARNING: SHUT OFF THE GAS SUPPLY BEFORE SERVICING THE UNIT.

1.Remove the pressure gauge tubing and power cable from the rear of the control panel then remove the panel.

2.Disconnect the spark ignition cable from the ignitor terminal.

3.Disconnect pilot gas tubing from the air pressure switch tee.

4.Separate the union above the main gas valve and remove the gas valve piping assembly.

NOTE: Removal of the gas valve piping assembly assumes the use of a gas line quick connect or union at the gas supply inlet to the steamer.

5.Remove the screws from the burner head assembly end plate and pull the assembly out from the complete burner assembly.

6.Reverse procedure to install and check for proper operation.

COMPLETE BURNER

ASSEMBLY

WARNING: DISCONNECT THE ELECTRICAL POWER TO THE MACHINE AT THE MAIN CIRCUIT BOX. PLACE A TAG ON THE CIRCUIT BOX INDICATING THE CIRCUIT IS BEING SERVICED.

WARNING: SHUT OFF THE GAS SUPPLY BEFORE SERVICING THE UNIT.

1.Refer to steps 1 through 4 under "BURNER HEAD ASSEMBLY".

2.Remove the four nuts from combustion blower mounting flange and remove blower from burner tube assembly.

3.Remove the four nuts from the burner tube assembly then slowly pull the assembly straight out from the heat exchanger.

CAUTION: Use care while removing as to not damage the ceramic insulation surrounding the burner.

4.Reverse procedure to install and check for proper operation.

F24700 (October 2001)		Page 18 of 68

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Vulcan-Hart MHB24G, VHX24G5 manual Burner Head Assembly, Complete Burner Assembly

Contents

VHX Boiler Base Series High Efficiency GAS Steamers VHX24G Shown Table of Contents VHX Series Steamers Installation Maintenance Cleaning IntroductionGeneral Boiler Control Styles Water Supply Water Conditioning SpecificationsSystem Electrical Standard ToolsGas Supply Special Cooking Compartment Controls Steamer OperationCabinet Base Boiler VHX Series Steamers Operation Boiler Blowdown Steamer Shut OFF Blowdown/Drain Component FunctionVHX Series Steamers Component Function Ignition Control Module Water Inlet Valve manual Steam Header AssemblyWater Level Pressure Relief Valve Manifold Pressure Gauge Compartment Pressure SwitchSteam Solenoid Valve Steam Supply Manifold Component Locations Removal and Replacement of PartsVHX Series Steamers Removal and Replacement of Parts Cabinet Base Boiler Controls Cabinet Base Boiler Controls Water Level Controls Main or Auxiliary Llco Relay BoardCooking Compartment Controls Water Level Gauge Assembly Pressure SwitchesBoiler Assembly 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 Cooking Compartment Doors RemovalGasket Latch Assembly Handle Boiler Service Procedures and AdjustmentsClean-Out 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 Cooking Compartment Intake Shut-Off Valve Adjustment Steam FlowDoor Sealing Adjustment 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 Initial Conditions State a Boiler Operational Status LED IndicatorReset Engaged State C Aux Water Level Satisfied State B K51 Close Air Pressure Switch Satisfied State DK32 Close Burner ON, Boiler Heating to generate steam State E Initial Fill and Preheat Sequence of OperationNEW Style Controls Boiler 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 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