Boiler Operational Status LED Indicator | Vulcan-Hart VHX24G5

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
		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
	N4		X	satisfied. Therefore N4 is OFF	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
	N8	X		not satisfied	K4 not energized
				not satisfied

	N9	X		Cycling pressure switch is closed
	N9	X		and unit is calling for HEAT
				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
		ON	OFF

	N2	X		Aux water level is satisfied	Aux. LLCO relay energized, Aux. LLCO contacts
	N2	X		Aux water level is satisfied	CLOSED
					CLOSED

	N4	X		Aux LLCO water level and high limit	K1 energized - K1(1) CLOSE
	N4	X		are satisfied. Green “ready” light ON.	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)		Page 44 of 68

Image 44

Vulcan-Hart VHX24G5 Boiler Operational Status LED Indicator, Initial Conditions State a, Aux Water Level Satisfied State B

Contents

VHX Boiler Base Series High Efficiency GAS Steamers VHX24G Shown Table of Contents VHX Series Steamers General InstallationMaintenance Cleaning Introduction Boiler Control Styles Water Conditioning Specifications SystemWater Supply Electrical Tools Gas SupplyStandard Special Steamer Operation Cabinet Base BoilerCooking Compartment Controls VHX Series Steamers Operation Boiler Blowdown Steamer Shut OFF Component Function VHX Series Steamers Component FunctionBlowdown/Drain Ignition Control Module Steam Header Assembly Water LevelWater Inlet Valve manual Pressure Relief Valve Compartment Pressure Switch Steam Solenoid ValveManifold Pressure Gauge Steam Supply Manifold Removal and Replacement of Parts VHX Series Steamers Removal and Replacement of PartsComponent Locations Cabinet Base Boiler Controls Cabinet 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 Valves Burner Head Assembly Complete Burner Assembly Heat Exchanger VHX Series Steamers Removal and Replacement of Parts Gasket Cooking Compartment DoorsRemoval Latch Assembly Handle Service Procedures and Adjustments Clean-OutBoiler 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 AdjustmentCooking 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 CInitial Conditions State a Aux Water Level Satisfied State B Air Pressure Switch Satisfied State D K32 CloseK51 Close Burner ON, Boiler Heating to generate steam State E Sequence of Operation NEW Style Controls BoilerInitial 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 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 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