20011755
18
GB
Operation
8.6
Recirculation slotted holes adjustment
To adjust the fume recirculation slot 4), it is necessary to:
Loosen the screws 2) (Fi g. 18) and slightly turn the flame
tube 3). The required opening position is ind icated in
Tab. A, page 16. Use the template 5) supplied to adjust the
combustion head, as shown in Fig. 18.
When the adjustment is completed, tighten the three screws
2) with a torque no higher than 0.8 Nm.
8.7
Electrodes adjustment
WARNING
The opening position of the slots 4) is indicative.
In good flame stability conditions, open the slots
4) wider to reduce NOx further.
In unstable conditions, slowly close the slots 4).
3
2
4
1
5
D9346
Fig. 18
WARNING
The position of the electrodes cannot be regulat-
ed.
In case of failure, check that the measurements as
shown on the figure are respected.
3.
5
±
0.
5
16
±1
6 5
± 1
30
±
1
3.5
±
0.5
1 0 0
± 1
D9347
Fig. 19
