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

 

Page 44
Image 44
Vulcan-Hart VHX24G5 Boiler Operational Status LED Indicator, Initial Conditions State a, Aux Water Level Satisfied State B