Lanair MXD300 User Manual
Page 28
Section 9 - Controls
24
s Electric Air Solenoid Valve
The Electric Air Solenoid Valve is controlled by the Oil Primary Control. It acts as a shut-off
valve, (it’s open during operation, and closed when the burner is off ). The Electric Air
Solenoid Valve is located inside of the burner’s electrical box. (See Page 51).
s 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 pre-heater. (See Page 51).
s Air/Oil pre-heater
The Air/Oil pre-heater is an assembly that preheats the atomizing air and fuel to a prede-
termined temperature to properly combust used oil. The Air/Oil pre-heater is located in the
burner (See Page 51).
s Snap Disc
The Snap Disc accurately controls the temperature of the air/oil pre-heater assembly with
two resistance type cartridge-heating elements. The Snap Disc is mounted on the oil pre-
heater inside the burner. (See Page 51).
s 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 pre-heater opposite
the fuel valve. Replace the Nozzle annually, as they are prone to wear by contaminants in
waste oil (See Page 47).
s Fuel By-Pass Regulator (This is not used with the Optional metering pump)
s Fuel Supply Pump
s Optional Metering Pump Assembly
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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.
The Fuel Supply Pump pumps fuel from your oil storage tank to the burner. The Fuel Supply
Pump should be located as close to the fuel supply tank as possible. The Fuel Supply Pump
must be mounted horizontally (Shaft).
The metering pump pumps fuel from your oil storage tank to the burner. It also controls the
volume of fuel, and no regulator is required. The metering pump should be mounted on
your fuel supply pump with the shaft in the horizontal position.