L.B. White 300 Director - Manual (Page 23)

22
Heater Component Function
Air Pressure Switch
Safety device used to insure that the proper air flow is being
achieved as the gas solenoid is opened.
Burner
Mounted to the rear of the combustion chamber. The burner
meters and mixes the amount of air entering the chamber to
obtain proper combustion charactersitcs.
Fan Blade Assembly
Component used in conjunction with the motor to push the
cool air over the heat exchanger for transfer of heat before
blowing it into the occupied area.
Filter
The purpose of the filter is to trap very small particles which
may be present in in the fuel system. The high degree of
filtering is necessary to prevent foreign materials from
entering the burner nozzle.
Fuel Heating Element
Ensures the fuel being supplied to the pump remains in
liquid form even when the heater is used on cold days.
Heat Exchanger
Sealed combustion chamber over which cool air passes for
heat transfer. Also provides an area where burner flame
mixes with combustion air, thereby providing heat.
High Limit Switch
Safety device wired into the control system, used to break
the electrical circuit to the solenoid valve in the event of an
overheat situation.
Igniter
Ignition device used on automatic direct spark ignition
control systems. Ignites fuel by spark.
Ignition Control
Cicuit board which sends voltages to various controls in an
automatic ignition system, and monitors safe operation of
the heater. The device also incorporates a reset which must
be pushed to restart the heater if ignition fails
Ignition Transformer
Receives 120 volts from the ignition module and then
boosts it to a very high voltage at the ignitor causing the fuel
sprayed from the nozzle to ignite.
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. Drives the pump
and rotates the fan.
Nozzle
Sprays the fuel under pressure from the pump. .
On/Off Switch
Simple electrical device used to supply power to the ignition
control for heater operation.
Photocell
A light senstive resistor. Used to sense the presence of light
in the combsution chamber, allowing the heater to continue
its operation.
Pump
Connected to the motor shaft by a coupling, the pump pulls
fuel from the tank and forces it to the nozzle under pressure
for ignition when the fan motor is in operation.
Relay
Electrical component wired between ignition control and
motor. Used to feed voltage to motor upon receipt of voltage
from ignition control.
Solenoid Valve
Electro-megnetic device mounted on the pump body. The
solenoid acts as an on/off valve for fuel flow to the burner
nozzle. On this heater, there are two solenoid valves,
creating two stages of heat.
Thermostat
Electrical device used as an automatic “on/off” switch which
will respond to changes in temperature in a certain area.
Can be wired so contacts in the thermostat open or close on
temperature increase or decrease.