Riello DB 4 SM BLU Installation, Use And Maintenance Instructions page 32

5
Preparation for start up
5.1 Combustion head setting
Loosen the screw 1) and turn the graduated sector 2) according diagrams Fig. 16. The system
allows an optimal setting even at a minimum firing rate. Combustion head opening can be var-
ied by moving the lever onto holes from 0 to 6, Fig. 14.
The choice of the hole (0 - 6) to be used is decided on the basis of diagram (Fig. 16) 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 delivery is insufficient even
with the damper fully open, you can use a different setting to that illustrated in diagram (Fig. 16)
- do this by moving the lever onto the next highest hole numerically speaking, thus increasing
the combustion head's opening and hence air delivery.
For operation on flame-reversal boilers, gas pipes must be adjusted to hole
position 4, see Fig. 15.
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5.2 Position of electrodes (Fig. 17)
Make sure that the electrode and
the probe are positioned as shown
in Fig. 17.
12
7
6 6
5 5
4 4
3 3
2 2
1 1
0 0
2000
1000 1500 2500
18,5
Fig. 17
3000 3500 4000 4500
Electrode
0
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5000 kW
Probe
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1
2
Fig. 14
Fig. 15
Fig. 16
7
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