Vulcan-Hart VHX24G5 Boiler Operational Status LED Indicator, Initial Conditions State a, Closed

Page 44

VHX SERIES STEAMER - ELECTRICAL OPERATION

Boiler Operational Status (LED Indicator)

Use the tables below to determine the operational status of a component or condition by utilizing the LED indicators on the board. The operational state’s are divided into categories A thru F.

Initial Conditions: (STATE A)

-120V, water and gas supplied to steamer

-Power Switch ON

-HIGH PRESS and LOW WATER lights ON (amber, front control panel)

-Green “ready” light OFF

-Water is filling boiler

LED

STATUS

DESCRIPTION

ELECTRICAL COMPONENTS CONDITION

 

 

ON

OFF

 

 

 

 

 

 

 

 

N1

X

 

24V supplied to relay board

 

 

 

 

 

 

N2

 

X

Aux Water level not satisfied

Aux. LLCO contacts OPEN

 

 

 

 

 

N3

X

 

High limit pressure switch satisfied

K2 energized - K2(1) CLOSE, K2(2) CLOSE

 

 

 

 

 

N4

 

X

Aux Water level is initially not

K1(1) OPEN

 

satisfied. Therefore N4 is OFF

 

 

 

 

 

 

 

 

 

N5

 

X

Reset switch is not being energized

 

 

 

 

 

 

N6

X

 

Aux Water level is/was not satisfied

K3 not energized

 

 

 

 

 

N7

 

X

Reset switch is not being energized

 

 

 

 

 

 

N8

X

 

High Limit pressure switch is/was

K4 not energized

 

not satisfied

 

 

 

 

 

 

 

 

 

N9

X

 

Cycling pressure switch is closed

 

 

and unit is calling for HEAT

 

 

 

 

 

 

 

 

 

 

N10 through N17 remain OFF

 

 

 

 

 

 

Aux Water Level Satisfied: (STATE B)

-Green “ready” light ON (ready light remains ON, until a LOW WATER or HIGH PRESSURE) condition occurs. Status of LED’s are the same as “Initial Conditions” except for the following:

LED

STATUS

DESCRIPTION

ELECTRICAL COMPONENTS CONDITION

 

 

ON

OFF

 

 

 

 

 

 

 

 

N2

X

 

Aux water level is satisfied

Aux. LLCO relay energized, Aux. LLCO contacts

 

CLOSED

 

 

 

 

 

 

 

 

 

N4

X

 

Aux LLCO water level and high limit

K1 energized - K1(1) CLOSE

 

are satisfied. Green “ready” light ON.

 

 

 

 

 

 

 

 

 

Reset Engaged: (STATE C)

User presses/engages the RESET button

- LOW WATER and HIGH PRESSURE lights OFF (amber, front control panel)

F24700 (October 2001)

 

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Contents VHX Boiler Base Series High Efficiency GAS Steamers VHX24G ShownTable of Contents VHX Series Steamers General InstallationMaintenance Cleaning Introduction Boiler Control Styles Water Conditioning Specifications SystemWater Supply ElectricalTools Gas SupplyStandard SpecialSteamer Operation Cabinet Base BoilerCooking Compartment Controls VHX Series Steamers OperationBoiler Blowdown Steamer Shut OFF Component Function VHX Series Steamers Component FunctionBlowdown/Drain Ignition Control ModuleSteam Header Assembly Water LevelWater Inlet Valve manual Pressure Relief ValveCompartment Pressure Switch Steam Solenoid ValveManifold Pressure Gauge Steam Supply ManifoldRemoval and Replacement of Parts VHX Series Steamers Removal and Replacement of PartsComponent Locations Cabinet Base Boiler ControlsCabinet 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 ValvesBurner Head Assembly Complete Burner AssemblyHeat Exchanger VHX Series Steamers Removal and Replacement of Parts Gasket Cooking Compartment DoorsRemoval Latch Assembly HandleService Procedures and Adjustments Clean-OutBoiler InspectionWater Level Probe Housing Blowdown Descaler Cathodic ProtectorWater Level Controls TestAuxiliary Low level Cut-Off Control High Limit CyclingFill and Cold Water Solenoid Valves Small incrementsInline Water Strainer Cleaning Boiler BLOWDOWN/DRAIN Solenoid ValvePressure Switch Adjustment Main Burner Ignition ChecksGAS 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 TerminalsSpark Verification Test Intake Shut-Off Valve Adjustment Steam Flow Door Sealing AdjustmentCooking Compartment Cooking Compartment DoorsDoor Latch Adjustment VHX Series Steamer Electrical OperationElectrical Operation Low Level Cut-Off & Differential ControlAuxiliary Low Level Cut-Off Board Layout and LED Legend LED LegendBoiler Operational Status LED Indicator Reset Engaged State CInitial Conditions State a Aux Water Level Satisfied State BAir Pressure Switch Satisfied State D K32 CloseK51 Close Burner ON, Boiler Heating to generate steam State ESequence of Operation NEW Style Controls BoilerInitial Fill and Preheat HL-LEDN9, N10, N11, N12, N13 go out N14, N16, N17 go outWater Refill After Initial Fill Boiler Blowdown/drainVHX Series Steamer Electrical Operation Cooking Compartment Controls This page Intentionally Left Blank Schematics Models Built After 5/25/00 New Style Boiler ControlsVHX 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
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