L.B. White 250 Norseman - Manual (Page 15)

Heater Component Function
Burner
Cast iron component used to channel gas and provide an
area at which the fuel may ignite.
Burner Orifice
Brass metering device used to feed gas to burner at a
specific rate.
Gas Hose
Flexible connector used to convey gas from supply line in
building to heater.
Pilot Light Orifice
A metering device used to supply gas for the dual purpose of
igniting the main burner and heating the thermocouple.
Pilot Safety Control Valve
A gas control valve which is held open by electrical power
supplied by a pilot generator and which closes automatically
to shut off the flow of gas to the main burner when the pilot
flame is extinguished or becomes too small to light the main
burner.
Pilot Tube
Formed copper tube used to convey gas from the safety
control valve to the pilot light orifice.
Regulator
The heart of any gas supply installation. Used to deliver a
working pressure to the heater under varying conditions in
tank pressure.
Thermocouple
A thermoelectric device that converts heat energy directly
into electrical energy. Works in conjunction with the
electromagnet in the gas control valve thereby providing gas
supply for the pilot light.
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