Heater Component Function - L.B. White Tradesman 170 Owner's Manual And Instructions

Air Proving Switch
Safety device used to insure that the proper air flow is being
achieved before the gas valve is opened.
Auto Reset 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.
Burner
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.
Combustion Chamber
Metal chamber within heater that provides an area where
burner gas mixes with combustion air, thereby providing
heat.
Direct Spark Ignition Control Module
Electronic printed circuit board which sends and receives
voltages to various controls in an automatic ignition system.
An important safety feature of the control board is that it will
shut down the entire heater, thereby stopping the flow of
fuel gas if burner flame goes out.
Fan
Component used in conjunction with the motor to pull the
fresh air into the heater and blow it into room for heating

Heater Component Function

Gas Control Solenoid Valve
House an electromagnet which is energized by voltage and
opens to allow passage of gas to the burner orifice.
Gas Hose
Flexible connector used to convey gas from supply line in
building to heater.
Igniter
Ignition device used on automatic direct spark ignition
control systems. Ignites gas by spark.
Igniter Wire
Cable used to provide high voltage to the igniter and also a
pathway for flame sense current.
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.
Regulator
Mechanical device used in gas distribution systems to
reduce a higher inlet pressure to a preset lower pressure.
The regulator is responsible to supply a steady outlet
pressure to the heater(s) despite changes in inlet pressure,
heater demand and weather conditions.
Thermostat
Electrical device used as an automatic "on/off" switch
which will respond to changes in temperature in a certain
area.
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