Riello Burners BG1 Manuel D'entretien page 43

A
Fig. 12 –Remove nozzle-holder assem-
bly (1) after loosing screws (2) and nut (3), re-
move the small cables (6) from the control box,
the socket (4) and the flame detector (5).
– Withdraw the small cables (6) from the elec-
trodes, remove the diffuser disc-holder assem-
bly (9) from the nozzle-holder assembly (1) after
loosing screw (3, fig. 15, page 8).
– Screw the nozzle (10) correctly and tighten it as
shown in figure.
ATTENTION
– During the reassembly of the nozzle-holder
assembly screw the nut (3) as shown in the
fig. 13.
– In order to guarantee the sealing of the fan in
its seat, make sure that there is at least 1 mm
of spring tension between nozzle-holder as-
sembly and casing.
Therefore the fixing split pin (11) will have to
be extended at least of 1 mm beyond the
flange of the nozzle-holder assembly.
2 PUMP PRESSURE
– 12 bar: the pump leaves the factory set at this
value.
To change it act on pump pressure adjust
screw (5, fig. 7, page 4).
AIR DAMPER
3
ADJUSTMENT
(see fig. 12)
– To vary the setting adjust the screw (7) after
loosing the nut (8).
– Values in the table refer to 12% CO
to sea level.
– When burner shuts down the air damper auto-
matically close still a max. chimney depres-
sure of 0.5 mbar.
SLOTS SETTING FOR THE FLUE GASES
RECIRCULATING (see fig. 14)
The flame tube is equipped with a device for the
slots setting for the flue gases recirculating; this
recirculating system allows to reduce the pulsa-
tions of the burner during the start.
The burner leaves the factory with the slots
completely opened.
This setting requires the following operations:
– Loosen the screw (1).
– Turn the ring (2) closing the slots in part until to
eliminate the pulsations verifying that the com-
bustion values meet the limits stated by the
standards in force.
– Tighten the screw (1) .
2318
Fig. 12
and
2
Fig. 13
Fig. 14
7 GB
S7266
D5684
3
TIGHTEN WITHOUT MOVING
BACKWARDS TO THE END
S7329