Riello BS1F Instrucciones De Instalación, Uso Y Mantenimiento página 20

5.7 Combustion head adjustment
The combustion head leaves the factory set for the minimum
output.
The adjustment of the combustion head varies depending on the
burner output.
This is carried out by turning the adjustment screw 6)(Fig. 13)
clockwise or anti-clockwise until the notch on the regulating rod
2) lines up with the outside surface of the head assembly 1).
In Fig. 13 the head regulating rod is set to notch 3.
Example for BS3F burner
The diagram (Fig. 14) is indicative and shows the calibration of
the combustion head in relation to the burnt output.
To ensure the burner works efficiently, we suggest adjusting the
combustion head according to the requirements of the specific
boiler.
The burner is installed in a 100 kW boiler. Considering an effi-
ciency of 90%, the burner must supply around 110 kW; for this
burner output the adjustment should be on notch 3.
5.7.1 Removing the head assembly
To remove the head assembly (Fig. 13) it is necessary to:
 disconnect the connections 3) and 5) and loosen screws
10);
 loosen and remove the screws 7), remove the head holder
assembly 1) by slightly rotating it to the right.
Take care not to change the setting position on
the elbow-bracket 2)(Fig. 13) when dismantling.
CAUTION
5.7.2 Reassembling the head assembly
Reassemble with the reverse procedure to that described above,
repositioning the head assembly 1)(Fig. 13) as it was originally.
Screw in the screws 7)(Fig. 13) all the way without
locking them.
Lock them with a tightening torque of 3 - 4 Nm.
CAUTION
Check that when operating there are no gas leaks
from the screw housings.
ATTENTION
20140262
Installation
S7795
kW
kcal/h
270
250
210,000
230
210
170,000
190
170
130,000
150
130
110
90,000
90
70
50,000
50
30
10,000
10
0
18
GB
BS2F
BS1F
2 4 6 8
Set point
Fig. 13
D8934
12
10
Fig. 14