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

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) Page 44 of 68