H-17 • Radiant Heaters
Owner’s Manual • H-17
23
Air Housing
Secures safety control valve to venturi tube.
Also allows combustion air to be drawn in to
venturi tube with gas
fl
ow for combustion.
Burner Ori
fi
ce
Metering device used to feed gas to emitter at
a speci
fi
c
fl
ow rate.
Canopy
Re
fl
ective stainless steel heat shield.
Gas Hose
Flexible connector used to convey gas from
gas supply line to inlet of heater.
Safety Control Valve
Safety shut off device used to feed fuel gas to
the emitter. Will shut off
fl
ow of gas completely
if gas
fl
ame is extinguished. Works in conjuc-
tion with the thermocouple. If the thermocouple
is defective, the magnet internal to the safety
control valve closes, shutting off all gas
fl
ow in
the heater.
Manual Ignition Heaters
Heater Component Function
Thermocouple
Safety device that holds the electromagnet
in safety gas control valve open when heat is
applied to thermocouple tip.
Venturi Tube
Tubular steel neck connecting the gas control
valve and burner ori
fi
ces to the combustion
cones. Gas is fed to the emitter through the
venturi tube.
