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PART I: INSTALLATION
GENERAL FEATURES
This series is characterised by high performaces and width of the performance curves, when the pressure in the
combustion chamber is high. They are also characterised for other important functional features: there are plugs which
can be easily connected to the boiler and to the detecting probes, a pressure plug in the combustion chamber, all
mechanical components are mounted on a plate which can be quickly taken off for maintenance. The head is
adjustable through a graduated screw. They can be provided as Single-stage or Double-stage burners.
Single-stage: the burner operates at one output level
Double-stage: the burner operates at two output levels: high flame and low flame.
Keys
1. Control panel with startup switch (only for double-stage models)
2. Flange
3. Blast tube
4. Fuse (only for double-stage models)
5. Combustion head (inside)
6. Photoresistor
7. Unlock pushbutton for control box
8. Transformer
9. Solenoid valve
10. Cover
11. Pump
12. Pump motor
13. Actuator (double-stage burners)
14. Air inlet
The fuel coming from the supply line, is pushed by the pump (11) to the nozzle and then into the combustion chamber,
where the mixture between fuel and air takes place and consequently the flame.
In the burners, the mixture bertween fuel and air, to perform clean and efficient combustion, is activated by
atomisation of oil into very small particles. This process is achieved making pressurised oil passing through the
nozzle.
The pump (11) main function is to transfer oil from the tank to the nozzle in the desired quantity and pressure. To
adjust this pressure, pumps are provided with a pressure regulator (except for some models for which a separate
regulating valve is provided). Other pumps are provided with two pressure regulators: one for the high and one for low
pressure (in double-stage systems with one nozzle).
In the double-stage burners, the electric servocontrol (13), that moves the air damper, allows the optimisation of the
gas flue values, as to get an efficient combustion. The position of the combustion head determines the burner’s output.
The air (comburent) and fuel (light oil) are forced into the combustion chamber, as to let the flame light up.