Adjusting The Choke; Combustion Head Adjustment - Riello BG6.1D Instrucciones De Instalación, Uso Y Mantenimiento

5.7

Adjusting the choke

In certain applications, for example on boilers with three flue gas
passes or systems with particularly long flues, or flues with a wide
section, flame instability is possible due to the excessive recircu-
lation of flue gases through the recirculating pipe 1)(Fig. 11).
In these cases it is possible to adjust the choke 2)(Fig. 11) to re-
duce the section through which the flue gases pass, referring to
Tab. H page 22.
5.8

Combustion head adjustment

The adjustment of the combustion head varies depending on the
burner output.
Do the following to adjust it:
Turn the adjustment screw 2)(Fig. 12) clockwise or anti-clock-
wise until the notch on the regulating rod 3)(Fig. 12) lines up with
the outer surface of the nozzle-holder assembly 1)(Fig. 12).
Example:
the regulating rod 3)(Fig. 12) is calibrated to notch 2.5; this
means that the burner is adjusted for an output of 5.3kg/h with the
pump pressure at 9 bar and with the use of a 1.50 GPH nozzle,
as indicated in Tab. H page 22.
20137240
Installation
D9687
S7995
16
GB
1
2
mm
2
3
1
Fig. 11
Fig. 12