L.B. White I-34 Infraconic Ignition - Manual (Page 25)

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Heater Component Function
Burner Orifices
Metering devices used to feed gas to combustion cones at a
specific flow rate.
Canopy
Reflective aluminum heat shield for heater.
Double Combustion Chamber
Made of special alloy steel. This is where combustion of gas
occurs, providing radiant heat used in the warming process.
Gas Hose
Flexible connector used to convey gas from gas supply line
to inlet of heater.
Injector Body
Secures pilot gas valve to injector tube. Also allows
combustion air to be drawn in to injector tube with gas flow
for combustion.
Venturi Tube
Tubular steel “neck” connecting the gas control valve and
burner orifices to the combustion cones. Gas is fed to the
combustion cones through the injector tube.
Manual Shut Off Valve
It’s purpose is to shut off gas flow to the heater if
maintenance or service are required, or if an emergency
situation occurs. When the handle on the manual valve is
turned parallel to gas flow, the valve is completely open
delivering full gas supply to the appliance. Turning handle
perpendicular (90°) to gas flow shuts off gas flow.
Safety Control Valve
Safety shut off device used to feed fuel gas to the heater
combustion cones for heating. Will shut off flow of gas
completely if gas flame is extinguished.
Pressure Valve
Feeds higher pressure gas to burner orifice, and therefore to
combustion cones.
Thermal Fuse
Safety device connected in series with thermocouple which
will shut off gas control valve if temperature of heater
injector body increases abnormally. (Available only with
thermocouple for replacement purposes.)
Thermocouple
Safety device that will continue to hold open electromagnet
in safety gas control valve when heat is applied to
thermocouple tip. It will also stop gas flow if inner
combustion flame is out.
Thermostatic Head and Sensor Assembly
Device used to cycle the heater and to maintain a specific
temperature. Used on modulating zone panels and
individual control heaters only.