Start-up, calibration and operation of the burner
27
2916050
GB
5.1
Notes on safety for the first start-up
5.2
Burner calibration
The optimum calibration of the burner requires an analysis of the
flue gases at the boiler outlet.
The following settings that have already been made do not require
modification under normal circumstances:
5.2.1
Combustion head setting
5.2.2
Nozzle adjustment
5.2.3
Electrode position
Refer to Fig. 15.
5.2.4
Servomotor, cams I - II - III
Refer to page 28.
5.3
Burner starting
Close the control circuit, with the switches in Fig. 38 and Fig. 33 in
the “
AUTO
” position.
On firing turn the switch (Fig. 38) to “
MAN
”.
5.3.1
Maximum output
Using button B)(Fig. 38), “increase output” until it stops at app.
130° (cam 1).
Place the slide switch on MAX and set the relative MAX trim poten-
tiometer (setting must be very near to 130°) to exploit as far as pos-
sible the variable profile cam 2)(Fig. 34).
The setting of the oil delivery must be made on the variable eccen-
tric 6)(Fig. 14 on page 17) by turning the screw 5)(Fig. 14 on
page 17).
The air setting must be made on the variable profile cam 2)(Fig. 34)
after loosening the screws 4)(Fig. 34) by turning the screws 3).
5.3.2
Minimum output
With the slide switch on the “
OPE
” position, use button B)(Fig. 38)
“decrease output” until it stops at app. 20° (cam 3).
Put the slide switch in the MIN position and set the modulation min-
imum using the relative MIN trim potentiometer.
The setting of the oil delivery must be made on the nut and lock-nut
4)(Fig. 14 on page 17) and, if necessary, on the variable eccentric
6)(Fig. 14 on page 17).
5.3.3
Intermediate outputs
With the switch C)(Fig. 38) in the “
AUTO
” position, the slide switch
in the “
OPE
” position and the switch 1)(Fig. 33) in the “
MAN
” posi-
tion, move the button 2)(Fig. 33) in various intermediate levels be-
tween maximum and minimum and set the variable profile cam
2)(Fig. 34) to achieve optimum combustion, by turning the
screws 3)(Fig. 34).
If possible, do not change the previously set maximum and mini-
mum levels.
When the setting is complete, lock the cam profile using screws
4)(Fig. 34).
5
Start-up, calibration and operation of the burner
WARNING
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
Check the correct working of the adjustment, com-
mand and safety devices.
WARNING
When the eccentricity is modified, it is necessary to
bring back to MAX and check the setting again.
The setting must be made on the adjustable profile
cam 2)(Fig. 34).
WARNING
Do not change the eccentric, already adjusted for
MAX and MIN.
Check the various setting levels with a combustion
analysis.
Make a progressive setting of the profile, without
sharp changes.
Fig. 33
1
2
D791
