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5.5.3
Blast tube length
The length of the blast tube must be selected according to the in-
dications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door com-
plete with its refractory.
The lengths L available are:
Blast tube
RS 160-200/E O
BLU
2
5.6
Positioning probe - electrode
Before fixing the burner to the boiler, check from
the opening of the blast tube that the probe and
the electrode are correctly positioned, as in
Fig. 16.
WARNING
If, in the previous check, the position of the probe or electrode
was not correct, is necessary:
remove the screw 1)(Fig. 15)
extract the inner part 2)(Fig. 15) of the head, and adjust
them.
Do not rotate the probe: leave it as in Fig. 16.
If it is located too close to the ignition electrode,
the control box amplifier may be damaged.
WARNING
Observe the dimensions shown in Fig. 16.
WARNING
20164541
Short (mm)
Long (mm)
373
503
Probe
Installation
For boilers with front flue passes 13)(Fig. 17 at page 23), or flame
inversion chambers, a protection in refractory material 11) must
be inserted between the boiler refractory 12) and the blast tube
10).
This protection must not compromise the extraction of the blast
tube.
For boilers with a water-cooled frontal, a refractory cover is not
necessary 11)-12)(Fig. 17), unless expressly requested by the
boiler manufacturer.
Tab. N
1
2
22
GB
D7951
Electrode
Fig. 15
20184506
Fig. 16
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