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7
Start-up, calibration and operation of the burner
7.1
Notes on safety for the first start-up
The first start-up of the burner must be carried out
by qualified personnel, as indicated in this manual
and in compliance with the standards and regula-
tions of the laws in force.
WARNING
7.2
Burner firing
Close load controls and set switch 1)(Fig. 20) to "MAN".
After burner firing a complete burner adjustment should be per-
formed.
7.3
Burner calibration
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet.
Adjust successively:
–
Combustion head
–
Servomotor
–
MAX burner output
–
MIN burner output
–
Intermediate outputs between MAX and MIN output
7.3.1
Combustion head setting
The setting of the combustion head depends exclusively on the
maximum burner delivery at which it will be operating.
Turn screw 4)(Fig. 21) until the notch shown in diagram (Fig. 22)
is level with the front surface of flange 5)(Fig. 21).
Example:
RL 50/M, maximum light oil delivery = 32 kg/h.
Diagram (Fig. 22) indicates that for a delivery of 32 kg/h the burn-
er requires the combustion head to be set to approx. three notch-
es, as shown in Fig. 21.
7.3.2
Servomotor
The servomotor (Fig. 23) provides simultaneous adjustment of
the air gate valve 11)(Fig. 24 at page 23) and the pressure regu-
lator 9) by means of a double variable profile cam, 4) and 7).
The servomotor rotates through 90° in 24 seconds.
Do not alter the factory setting for the 4 cams; simply check that
they are set as indicated below:
Cam I:
90°
Limits rotation toward maximum position.
Cam II:
0°
Limits rotation toward the minimum position. When the
burner is shut down the air gate valve must be closed:
0°.
Cam III:
15°
Adjusts the ignition position and the MIN output.
Cam IV:
not utilized.
20033316
Start-up, calibration and operation of the burner
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
Notches
D790
22
GB
1
2
D791
D462
Max light oil delivery - kg/h
Fig. 20
Fig. 21
Fig. 22
Fig. 23
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