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Vulcan-Hart
VHX24G, MHB24G
manual
Schematics, Models Built After 5/25/00 New Style Boiler Controls
Models:
VHX24G5
VHX24G
MHB24G
1
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Troubleshooting
Install
Parts list
Schematics
Reset Engaged State C
Steam Header Assembly
Procedures and Adjustments
Pressure Switch Adjustment
Clean-Out
Compartment Pressure Switch
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VHX SERIES STEAMER - ELECTRICAL OPERATION
SCHEMATICS
Models Built After 5/25/00 (New Style Boiler Controls)
F24700 (October 2001)
Page 52 of 68
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Contents
VHX Boiler Base Series High Efficiency GAS Steamers
VHX24G Shown
Table of Contents
VHX Series Steamers
Maintenance Cleaning Introduction
Installation
General
Boiler Control Styles
Water Conditioning Specifications
System
Water Supply
Electrical
Tools
Gas Supply
Standard
Special
Steamer Operation
Cabinet Base Boiler
Cooking Compartment Controls
VHX Series Steamers Operation
Boiler Blowdown Steamer Shut OFF
Component Function
VHX Series Steamers Component Function
Blowdown/Drain
Ignition Control Module
Steam Header Assembly
Water Level
Water Inlet Valve manual
Pressure Relief Valve
Compartment Pressure Switch
Steam Solenoid Valve
Manifold Pressure Gauge
Steam Supply Manifold
Removal and Replacement of Parts
VHX Series Steamers Removal and Replacement of Parts
Component Locations
Cabinet Base Boiler Controls
Cabinet Base Boiler Controls
Relay Board
Water Level Controls Main or Auxiliary Llco
Cooking Compartment Controls
Pressure Switches
Water Level Gauge Assembly
Boiler 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
Removal
Cooking Compartment Doors
Gasket
Latch Assembly
Handle
Service Procedures and Adjustments
Clean-Out
Boiler
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 Adjustment
Cooking 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 C
Initial Conditions State a
Aux Water Level Satisfied State B
Air Pressure Switch Satisfied State D
K32 Close
K51 Close
Burner ON, Boiler Heating to generate steam State E
Sequence of Operation
NEW Style Controls Boiler
Initial 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
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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
VHX Series Steamer Troubleshooting
Troubleshooting
Boiler Base Controls
Symptom Possible Causes
Adjustments
Boiler blowdown solenoid valve clogged and not fully closing
Boiler Base
Procedures and Adjustments
VHX Series Steamer
VHX Series Steamer Condensed Spare Parts List
Condensed Spare Parts List
NEW Style Controls only VHX24G, VHX24G5, MHB24G