Lanair HI320 User Manual
Page 32
SECTION 12 CONTINUED
12.7
Air Operated Fuel Valve:
The Air Operated Fuel Valve controls fuel flow out the nozzle. When the
Electric Air Solenoid Valve opens and air pressure pushes on the fuel
valve diaphragm, the plunger moves off the nozzle seat allowing fuel to
enter the nozzle.
The Air Operated Fuel Valve is located on the back of the air preheater
(See page 51).
12.8
Air/Oil Preheater:
The Air/Oil Preheater is an assembly that preheats the atomizing air and
fuel to a predetermined temperature to properly combust used oil.
The Air/Oil Preheater is located in the burner (See Page 51).
12.9
Snap Disc:
The Snap Disc accurately controls the temperature of the air/oil preheater
assembly with two resistance type cartridge-heating elements.
The Snap Disc is mounted on the oil preheater inside the burner.
12.10 Nozzle:
The Nozzle uses air pressure to help pull fuel through its small orifice, and
to atomize the fuel for proper combustion.
The Nozzle is located on the end of the air preheater opposite the fuel
valve.
Replace the Nozzle annually, as they are prone to wear by contaminants
in waste oil (See Page 18C).
12.11 Fuel By-Pass Regulator:
The Fuel By-Pass regulator controls the pressure of the fuel to the
nozzle.
The Fuel By-Pass regulator is located in the line between the outlet side
of the pump and the burner.
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