Combustion Head Adjustment; Adjustments Prior To Ignition; Pump Adjustment; Fan Damper Adjustment - Riello RL 25/1 BLU Instrucciones De Instalación, Funcionamiento Y Mantenimiento

5.7

Combustion head adjustment

5.7.1

Adjustments prior to ignition

 At this stage of the installation the blast tube and the pipe
coupling are secured to the boiler as shown in fig.10 on page
15. Therefore it is easy to adjust the combustion head that
depends only on the output of the burner, namely on the flow
rate of the nozzle selected in Tab. F on page 15.
 Turn the screw 4)(Fig. 14) until the notch indicated by the
diagram (Fig. 15) lines up with the front part of the flange
5)(Fig. 14).
Example:
Burner RL 25/1 BLU with 3.5 GPH nozzle and pump pressure of
14 bar: from the table Tab. F you get an output of 15.6 kg/h.
 The diagram (Fig. 15) indicates that for an output of 15.6 kg/h
the RL 25/1 BLU burner requires an adjustment of the com-
bustion head to about 3 notches, as shown in Fig. 15.
5.7.2

Pump adjustment

No adjustment to the pump is necessary, which has been set by
the manufacturer at:
– 22 bar: high pressure,
– 9 bar: low pressure,
This pressure should be checked and if necessary adjusted after
starting the burner.
5.7.3

Fan damper adjustment

The fan damper is adjusted by using the graduated sector
1)(Fig. 16), after loosening the nut 2)(Fig. 16). For the initial start-
ing, leave factory adjustment: notch 2, as in Fig. 16.
20156111
Installation
0 1 2 3
4
5
No. notches
16 GB
20158280
Burner output
D593
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Fig. 14
Fig. 15
Fig. 16