Heater Component Function - L.B.White Guardian AB250 Manual Del Usuario E Instrucciones

34
Guardian LP or Natural Gas Heater

Heater Component Function

Air Proving Switch
Safety device used to insure that the proper air flow
is being achieved before the gas valve is opened.
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.
Fan Housing
Chamber used for compressing air for efficient air
movement.
Fan Wheel
Component used in conjunction with the motor and
fan housing to pull the hot air from heater and blow
it into room for heating (also known as a "squirrel
cage").
Gas Hose
Flexible connector used to convey gas from supply
line in building to heater.
Heat Chamber
Metal fire box that provides an area where burner
flame mixes with combustion air thereby providing
heat.
High Limit Switch
Safety device wired into the control system which is
used to break an electrical circuit to the gas control
valve in event of overheat situation.
Motor
Electric device used to force preheated air through
the heater and to circulate heat within a certain
area. Converts electrical energy into mechanical
energy.
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 clos-
es automatically to shut off the flow of gas to the
Owner's Manual • Guardian
main burner when the pilot flame is extinguished
or becomes too small to light the main burner.
Pilot Shield
A formed sheet metal piece that fits around
the pilot assembly to protect the the pilot flame
against drafts.
Pilot Tube
Formed copper tube used to convey gas from
the safety control valve to the pilot light orifice.
The tube is internally "tinned" when natural gas is
used to resist the effects of sulphur in the fuel.
Regulator
The heart of any gas supply installation. Used to
deliver a working pressure to the appliance 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.
Thermostat
Electrical device used as an automatic on/off
switch which will respond to changes in tempera-
ture in a certain area.
Throttle Valve
Manually adjustable component used to increase
or decrease the flow of gas to the burner. The
throttle valve is located between the gas control
valve and burner assembly.