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5.6.2
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 fettling.
For boilers with front flue passes 1)(Fig. 15) or flame inversion
chamber, a protection in refractory material 5) must be inserted
between the boiler fettling 2) and the blast tube 4).
5.7
Coupling of the burner - Centre of gravity position
Provide an adequate lifting system.
Hook and lift the burner as shown in Fig. 14.
WARNING
5.8
Securing the burner to the boiler
Prepare a suitable lifting system using the rings 3)
after having removed the casing 8) unscrewing
screws 7)(Fig. 15).
Insert the thermal protection supplied with the blast tube 4).
Fit the entire burner onto the boiler hole, prepared previ-
ously, as in Fig. 13, and fasten with the screws supplied
(tightening torque 250 ÷ 300 Nm).
Installation
3
20094551
19
This protective fettling must not compromise the extraction of the
blast tube.
For boilers with a water-cooled front piece, a refractory lining 2)-
5)(Fig. 15) is not necessary, unless expressly requested by the
boiler manufacturer.
1 0 7
The seal between burner and boiler must be
airtight.
WARNING
1
3
1
GB
1 8 0
20096822
Fig. 14
2
4
5
Fig. 15
20089633
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