Riello DB 6 SM CO1 A0, Installation, Use And Maintenance Instructions

Page: 35 / 64

13
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.
Fig. 18
1
2
0
1
2
3
4
5
6
D8299
1600 2000 2400 2800 3200 3600 4000 4400
kW
4800 5200
3
2
1
0
5600 6000
N° Hole
Maximum burner output
Fig. 19
N° Hole
Maximum burner output
DB 6 SM
DB 4 SM
D7905
D8417
kW 7800 8200 7400 7000 6600 6200 5800 5400 5000 4400 4000
0
1
2
3
Maximum burner output