Riello DB4SMC01 AO FS1 T150 Installation, Use And Maintenance Instructions page 35

5
Preparation for start up
5.1 Combustion head setting
Loosen the screw 1) and turn the graduated sector 2) according dia-
grams Fig. 19.
The system allows an optimal setting even at a minimum firing rate.
Combustion head opening can be varied by moving the lever onto
holes from 0 to 6, Fig. 18.
The choice of the hole (0 - 6) to be used is decided on the basis of di-
agram (Fig. 19) against the required maximum output. Setting is pre-
arranged in the plant for the maximum power (hole 6).
When dealing with boilers featuring a strong back pressure, if air deliv-
ery is insufficient even with the damper fully open, you can use a differ-
ent setting to that illustrated in diagram (Fig. 19) - do this by moving
the lever onto the next highest hole numerically speaking, thus increas-
ing the combustion head's opening and hence air delivery.
DB 4 SM
N° Hole
3
2
1
0
1600
DB 6 SM
N° Hole
3
2
1
0
4000
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2000 2400 2800 3200
4400 5000 5400 5800
3600 4000 4400 4800
Maximum burner output
6200 6600 7000
1
0
2
D8299
D7905
5200 5600 6000
kW
D8417
Maximum burner output
7400 7800 8200 kW
Maximum burner output
Fig. 18
Fig. 19
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