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5.7
Blast tube length
The length of the blast tube 7)(Fig. 8) 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 lengths available, L (mm), is as follows:
Blast tube 7)(Fig. 8)
RL 28/M
RL 38/M
RL 50/M
5.8
Securing the burner to the boiler
Disassemble the blast tube 7)(Fig. 8) from the burner 4) by pro-
ceeding as follows:
remove the screws 2) from the two slide bars 3).
Remove the screw 1) fixing the burner 4) to the flange 5).
Withdraw the blast tube 7) complete with flange 5) and slide
bars 3).
Secure flange 5) to the boiler plate interposing the supplied
gasket 6).
Installation
Short
Long
241
351
241
351
241
351
For boilers with front flue passes 10)(Fig. 8) or flame inversion
chambers, protective fettling in refractory material 8) must be in-
serted between the boiler fettling 9) and the blast tube 7).
This protective fettling must not compromise the extraction of the
blast tube.
For boilers having a water-cooled front the refractory fettling 8)-
9) is not required unless it is expressly requested by the boiler
manufacturer.
Use the 4 screws provided after having protected the thread
with antiscruffing products.
The burner-boiler seal must be airtight.
WARNING
15
GB
D854
Fig. 8
20033316
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