Vulcan-Hart
VHX24G5, MHB24G
manual
VHX Series Steamer Electrical Operation
Troubleshooting
Install
Parts list
Schematics
Reset Engaged State C
Steam Header Assembly
Procedures and Adjustments
Pressure Switch Adjustment
Clean-Out
Compartment Pressure Switch
Page 53
VHX SERIES STEAMER - ELECTRICAL OPERATION
Page 53 of 68
F24700 (October 2001)
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Contents
VHX24G Shown
VHX Boiler Base Series High Efficiency GAS Steamers
Table of Contents
VHX Series Steamers
General
Installation
Maintenance Cleaning Introduction
Boiler Control Styles
System
Water Conditioning Specifications
Water Supply
Electrical
Gas Supply
Tools
Standard
Special
Cabinet Base Boiler
Steamer Operation
Cooking Compartment Controls
VHX Series Steamers Operation
Boiler Blowdown Steamer Shut OFF
VHX Series Steamers Component Function
Component Function
Blowdown/Drain
Ignition Control Module
Water Level
Steam Header Assembly
Water Inlet Valve manual
Pressure Relief Valve
Steam Solenoid Valve
Compartment Pressure Switch
Manifold Pressure Gauge
Steam Supply Manifold
VHX Series Steamers Removal and Replacement of Parts
Removal and Replacement of Parts
Component Locations
Cabinet Base Boiler Controls
Cabinet Base Boiler Controls
Cooking Compartment Controls
Water Level Controls Main or Auxiliary Llco
Relay Board
Boiler Assembly
Water Level Gauge Assembly
Pressure Switches
Boiler Fill and Cold Water Condenser Solenoid Valves
Pilot GAS Valve Main GAS Valve
Complete Burner Assembly
Burner Head Assembly
Heat Exchanger
VHX Series Steamers Removal and Replacement of Parts
Gasket
Cooking Compartment Doors
Removal
Handle
Latch Assembly
Clean-Out
Service Procedures and Adjustments
Boiler
Inspection
Descaler Cathodic Protector
Water Level Probe Housing Blowdown
Test
Water Level Controls
Auxiliary Low level Cut-Off Control
Cycling
High Limit
Small increments
Fill and Cold Water Solenoid Valves
Boiler BLOWDOWN/DRAIN Solenoid Valve
Inline Water Strainer Cleaning
Main Burner Ignition Checks
Pressure Switch Adjustment
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
Terminals
Ignition Control Module Checks
Spark Verification Test
Door Sealing Adjustment
Intake Shut-Off Valve Adjustment Steam Flow
Cooking Compartment
Cooking Compartment Doors
VHX Series Steamer Electrical Operation
Door Latch Adjustment
Low Level Cut-Off & Differential Control
Electrical Operation
Auxiliary Low Level Cut-Off
LED Legend
Board Layout and LED Legend
Reset Engaged State C
Boiler Operational Status LED Indicator
Initial Conditions State a
Aux Water Level Satisfied State B
K32 Close
Air Pressure Switch Satisfied State D
K51 Close
Burner ON, Boiler Heating to generate steam State E
NEW Style Controls Boiler
Sequence of Operation
Initial Fill and Preheat
HL-LED
N14, N16, N17 go out
N9, N10, N11, N12, N13 go out
Boiler Blowdown/drain
Water Refill After Initial Fill
VHX Series Steamer Electrical Operation
Cooking Compartment Controls
This page Intentionally Left Blank
Models Built After 5/25/00 New Style Boiler Controls
Schematics
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
Troubleshooting
VHX 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 List
VHX Series Steamer Condensed Spare Parts List
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