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5.10
Nozzle installation
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 Riello in
the Instruction and warning booklet should be used.
It is advisable to replace the nozzle once a year
during periodical maintenance.
WARNING
The use of nozzles other than those specified by
Riello S.p.A. 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.
CAUTION
The manufacturing company shall not be liable for
any such damage arising from non-observance of
the requirements contained in this manual.
Fit the nozzle with the box spanner, fitting the spanner through
the central hole in the flame stability disk (Fig. 15).
D9248
Nozzles with no fuel shutoff needle must be fitted on the nozzle
holder.
To set the delivery range within which the nozzle must work, noz-
zle return line fuel pressure must be adjusted according to
Tab. H and Tab. I.
➤ Do not use any sealing products such as gas-
kets, sealing compound, or tape.
➤ Be careful to avoid damaging the nozzle seal-
ing seat.
WARNING
➤ The nozzles must be screwed into place
tightly but not to the maximum torque value
provided by the wrench.
20010305
Installation
40 mm
Fig. 15
18
5.10.1 Recommended nozzle
•
Bergonzo type B5 45°
•
Fluidics type N4 45°
Intermediate flow rates may be obtained by choosing the nozzle
with a nominal flow rate slightly higher than that actually required.
Complete range of nozzles:
➤ Bergonzo type B5 45°:
350 - 375 - 400 - 425 - 450 - 475 - 500 - 525 - 550 - 575 -
600 - 650 - 700 - 750. We normally recommend 45° angles
of pulverisation.
Delivery
kg/h
pressure
bar
20
375
20
20
550
20
20
650
20
25
750
25
➤ Fluidics type N4 45°:
375 - 400 - 450 - 500 - 550 - 600 - 650 - 700 - 750. We nor-
mally recommend 45° angles of pulverisation.
Delivery
kg/h
pressure
bar
20
375
20
20
550
20
20
650
20
25
750
25
GB
Return
pressure
kg/h
bar
11.5
147
17
295
10
170
17
421
8
180
16.5
565
11.5
227
20.5
675
Return
pressure
kg/h
bar
12
147
18.5
295
7
170
16
421
6
180
17
565
17
227
22
675
kW
1750
3500
2000
5000
2150
6650
2700
8000
Tab. H
kW
1750
3500
2000
5000
2150
6650
2700
8000
Tab. I
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