Vulcan-Hart VL2GAS, VL3GMS, VL2GMS, VL3GAS, VL2GSS Component Function, Cabinet Base Boiler Controls

VL SERIES STEAMERS - GENERAL

COMPONENT FUNCTION

CABINET BASE BOILER CONTROLS

Water Level
Gauge Assembly	Permits a visual confirmation the water level is being maintained in
	boiler during operation. The correct water level is a point one-half of the
	height of the glass. The manual valves at the top and bottom of this
	assembly must be fully open and only closed if the glass tube is
	damaged.
Water Level Control and
Level Sensing Probes	These controls allow water to enter the boiler to fill and maintain the
	proper water level. They will also shut off the heat source to the boiler if
	the water level drops too low. The water level control works by using
	three different probe lengths to monitor the water level. The probes
	consist of a high level (HL), low level (LL) and low water cut-off (LLCO).
Boiler Fill Solenoid Valve	Admits water to the boiler when demanded by the water level control to
	maintain the correct water level in the boiler.
Cold Water Condenser
Solenoid Valve	Allows cold water flow into the boiler blowdown drain box to condense
	steam and cool the hot water before its discharge into the drain.
Cycling Pressure Switch	Controls boiler pressure between prescribed limits by turning the heat
	source on and off.
High Limit Pressure Switch	A switch of identical design to the cycling pressure switch but used as a
	high limit. The pressure settings are at higher and lower limits than the
	cycling pressure switch in order to turn off the heat source before the
	boiler pressure reaches its limit and automatically resets after the
	pressure drops below the lower limit set point.
Blowdown/Drain
Solenoid Valve	This valve is plumbed into the drain line of the boiler. Newer steamer
	models will automatically blowdown when power is turned off by using a
	normally open solenoid valve. Older models can have a solenoid valve
	that is activated by depressing a separate blowdown timer button or
	have a manual “ball” type valve.
Inlet Water Strainer	A strainer is used in the water inlet line to prevent foreign matter from
	becoming lodged in the fill or cold water condenser solenoid valves and
	to keep unwanted particles out of the system. A "Y" strainer should be
	inserted upstream of the fill solenoid valve. On models using a direct
	steam supply, a strainer is also used in the pressure regulating valve.
Power Switch	When turned ON, power is supplied to the controls and the steam
	generating process is started in the boiler. The power switch is located
	on the front of the boiler control box.
Water Inlet Valve	The water inlet valve is used to stop water flow to the steamer when the
	steamer is being serviced. Newer models will have a small Petcock type
	valve while older models will be a “ball” type valve. This valve should
	remain open during normal operation.
High Limit Thermostat	A protective device that shuts off the heat source if the boiler
	temperature exceeds a specified limit. All standard models are equipped
	with a surface high limit.
Descaler	Hangs submerged in water inside the boiler and is used to help control
	boiler surface scaling. Two descalers are used in each boiler.

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