Combustion Head Adjustment; Removing The Head Assembly; Reassembling The Head Assembly - Riello BS2D Installation, Use And Maintenance Instructions

5.7

Combustion head adjustment

The adjustment of the combustion head varies depending on the
burner output.
This is carried out by turning the adjustment screw 6)(Fig. 12)
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. 12 the head regulating rod is set to notch 3.
Example for the BS3D burner
The diagram (Fig. 13) 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, it is necessary to:
 disconnect the connections 3) and 5)(Fig. 12);
 remove the tube 4) and loosen the screws 10)(Fig. 12);
 unscrew and remove the screws 7), remove the head holder
assembly 1)(Fig. 12) slight rotation to the right.
Take care not to change the setting position on
the elbow-bracket 2)(Fig. 12) when dismantling.
CAUTION
5.7.2

Reassembling the head assembly

Reverse the procedure above to put back the head assembly
1)(Fig. 12) as it was before.
Tighten the screws 7)(Fig. 12), without fully lock-
ing 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.
If the pressure test point 13)(Fig. 12) should be-
WARNING
come slack accidentally, we recommend fixing it
correctly ensuring that the hole (F) in the head as-
sembly 1)(Fig. 12) is facing downwards.
20135737
Installation
S7006
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
916T1
915T1
2 4 6 8
Set point
Fig. 12
D8934
12
10
Fig. 13