Heater Component Function - L.B. White SENTINEL AT 150 Owner's Manual And Instructions

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.
Burner Tubes
Conducts the heat provided by the ignition of fuel gas at the
burner.
Differential Air Pressure Switch
Safety device used to insure that proper positive and
vacuum pressures are within the burner box before the gas
valve is opened.
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 Housing
Chamber used for delivering air for efficient air movement.
Fan Wheel
Component used in conjunction with the motor and fan
housing. It is used to create pressures within thed burner
box used in the distribution of burner flame down the burner
tubes.
Gas Control Valve
Electrical device consisting of a low pressure regulator and
electrical solenoids used for the control of gas flow to the
burner assembly. The control is available as single stage or
two stage. A feature of the two stage control valve is it's
ability to modulate from a first stage (minimum) heat
position to a second stage (maximum) heat position, if
needed, to satisfy the temperature requirements of the
building. This results in less temperature variation and
potentially lower fuel consumption.

Heater Component Function

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.
Motor
Electric device used to force air through burner box to create
pressure used in the ignition of the heater.
Reflector
Polished aluminum canopy supported over the burner
tubes. Used to gather and reflect the radiant heat provided
by the burner tubes back down to ground level.
Regulator
Mechanical device used in L.P. and natural 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
A component which responds to a change in temperature .
This component is available for single stage or two stage
heating. The two stage thermostat incorporates two
independent control circuits which interconnect to the
heater's two stage gas control valve, thereby providing low
or high heat depending on thermostat setpoint.
Transformer
Electrical control used to accept line power supply primary
voltage and reduce it to lower secondary voltage to operate
certain control systems.
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