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5.5.3
Blast tube length
The length of the blast tube must be selected according to the
indications provided by the manufacturer of the boiler, and in any
case it must be greater than the thickness of the boiler door
complete with its fettling.
The range of available lengths L, is as follows:
Blast tube
RS 200/M BLU
5.6
Positioning the probe - electrode
Before securing the burner to the boiler, check
(through the opening of the blast tube) that the
probe and electrode are correctly positioned, as in
Fig. 14.
ATTENTION
If the probe or electrode is not correctly positioned, you must:
remove the screw 1)(Fig. 13)
take out the inner part 2)(Fig. 13) of the head and then
calibrate them.
Do not rotate the probe but leave it as in Fig. 14; if
it is too close to the ignition electrode, it could
damage the control box amplifier.
ATTENTION
Respect the dimensions shown in Fig. 14.
ATTENTION
Short (mm)
Long (mm)
373
503
PROBE
D1705
Installation
For boilers with front flue passes 13)(Fig. 15) or flame inversion
chambers, a protection in heat-resistant 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 front piece, a refractory lining 11)-
12)(Fig. 15) is not necessary, unless expressly requested by the
boiler manufacturer.
Tab. K
ELECTRODE
19
GB
D1706
Fig. 13
Fig. 14
20152093
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