VL SERIES STEAMER - ELECTRICAL OPERATION
ELECTRICAL OPERATION
WATER LEVEL CONTROLS
Solid State - Low level
The steamer is equipped with three water level sensing probes (high, low and low level
1.Provide low level
2.Performs as a differential level control to maintain the water level between the low and high water level probes.
The water level control (WLC) has input voltage (120VAC) across terminals 11 and 12 which powers the transformer. On one side of the transformer secondary, power is provided to the control by a series path through chassis ground (terminal 10). The other side of the transformer secondary (12VAC) supplies power to one side of the internal relays LLCO, HL and ILR. As water enters the boiler, it becomes part of the water level control’s circuit. When the water level in the boiler reaches a probe, that circuit is completed.
The inverse latching relay of the board is de- energized, leaving the
When the main power switch is turned ON, power is supplied to the WLC board which energizes the high level (HL) relay and illuminates the HL relay LED.
With the
When the water level reaches the low level
When the water level reaches the low level (LL) probe, power to terminal 2 on the WLC board is present but no switching occurs.
After the water level reaches the high level (HL) probe, the inverse latching relay of the board is energized and locked through the low level probe
(LL)and
When the water level drops below the low level (LL) probe, power is removed from the inverse latching relay, the HL relay energizes through
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