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20167399
Installation
5.10 Nozzle installation
5.10.1 Nozzle selection
The burner complies with the emission requirements of the EN
267 standard.
In order to guarantee that emissions do not vary, recommended
and/or alternative nozzles specified by the Manufacturer in the
instruction and warning booklet should be used.
The nozzle must be chosen from among those listed in Tab. H:
1 = Bergonzo nozzle type A3
2 = Nozzle maximum output
3 = Delivery pump pressure
4 = Nozzle return line maximum pressure
If you want an output somewhere between the two values shown
in the table, select a nozzle with a higher flow rate. The reduction
in the flow rate is obtained with the pressure variator.
NOZZLES RECOMMENDED:
Bergonzo type A3, or A4 - 45° angle.
Tab. H
5.10.2 Nozzle assembly
At this installation stage the burner is still separated from the blast
tube; therefore it is possible to fit the two nozzles with the socket
wrench 1)(Fig. 13) passing through the central opening of the
flame stability disc.
The nozzle must be screwed into place tightly but not to the
maximum torque value provided by the wrench.
Finally remount the burner 4)(Fig. 15) on the slide bars 3)
and slide it up to the flange 5), keeping it slightly raised to
prevent the flame stability disc from pressing against the
blast tube.
Tighten the screws 2) on the slide bars 3) and the screws 1)
fixing the burner to the flange.
If it proves necessary to change a nozzle with the burner already
fitted to the boiler, proceed as outlined below:
slide back the burner on the slide bars as shown in Fig. 12.
Remove the nuts 1)(Fig. 15) and the disc 2).
Replace the nozzle with wrench 3)(Fig. 16).
It is advisable to replace nozzles once a year
during periodical maintenance.
The use of nozzles other than those specified by
the Manufacturer and inadequate regular
maintenance may result into emission limits non-
conforming to the values set forth by the
regulations in force, and in extremely serious
cases, into potential hazards to people and
objects.
The Manufacturer shall not be liable for any such
damage arising from non-observance of the
requirements contained in this manual.
1234
A3 kg/h bar bar
15 13 20 17
20 20 20 17
30 24 20 15
40 30 20 16
50 33 20 16
60 42 20 16
70 50 20 15
Do not use any sealing products such as: gaskets,
tape or sealants. Be careful to avoid damaging the
nozzle sealing seat.
Check that the electrodes are placed as in
(Fig. 14).
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