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VHX SERIES STEAMERS
F24700 (October 2001) Page 2 of 68
TABLE OF CONTENTS
GENERAL............................................................................. 4
Installation ......................................................................... 4
Maintenance ....................................................................... 4
Cleaning .......................................................................... 4
Introduction ........................................................................ 4
Steam Cooking.................................................................. 4
Compartment Pan Capacity ........................................................ 4
Model Designations .............................................................. 4
Boiler Code Descriptions .......................................................... 4
Boiler Control Styles.............................................................. 5
Water Conditioning .................................................................. 6
Specifications ...................................................................... 6
Water Supply ................................................................... 6
Electrical ...................................................................... 6
Boiler Pressure.................................................................. 6
Gas Supply ..................................................................... 7
Tools ............................................................................. 7
STEAMER OPERATION.................................................................. 8
Cabinet Base Boiler .................................................................. 8
Cooking Compartment Controls......................................................... 8
Boiler Blowdown and Steamer Shut off ................................................... 9
Component Function ................................................................ 10
Cabinet Base Boiler Controls ...................................................... 10
Cooking Compartment Controls .................................................... 12
REMOVAL AND REPLACEMENT OF PARTS ................................................ 13
Component Locations ............................................................... 13
Cabinet Base Boiler Controls ...................................................... 13
Cooking Compartment Controls .................................................... 15
Water Level Controls
(Main or Auxiliary LLCO) ......................................................... 15
Relay Board....................................................................... 15
Water Level Gauge Assembly ......................................................... 16
Pressure Switches .................................................................. 16
Boiler Assembly.................................................................... 16
Boiler Fill and Cold Water Condenser Solenoid Valves ...................................... 17
Pilot Gas Valve .................................................................... 17
Main Gas Valve .................................................................... 17
Burner Head Assembly .............................................................. 18
Complete Burner Assembly ........................................................... 18
Heat Exchanger .................................................................... 19
Cooking Compartment Door(s)......................................................... 21
SERVICE PROCEDURES AND ADJUSTMENTS .............................................. 23
Boiler............................................................................ 23
Inspection..................................................................... 23
Clean-Out ..................................................................... 23
Deliming...................................................................... 23
Descaler (Cathodic Protector) ...................................................... 24
Water Level Probe Housing Blowdown .................................................. 24
Water Level Controls Test ............................................................ 25
Pressure Switches .................................................................. 27
Fill and Cold Water Solenoid Valves .................................................... 28
Boiler Blowdown/drain Solenoid Valve .................................................. 29
Inline Water Strainer Cleaning ......................................................... 29
Main Burner Ignition Checks .......................................................... 30