20040559
14
GB
Installation
5.5.2
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 refractory.
The range of lengths available, L (mm), is as follows:
For boilers with front flue passes 1) (Fig. 10) or flame inversion
chamber, a protection in refractory material 5) must be inserted
between the boiler fettling 2) and the blast tube 4).
This protection must not compromise the extraction of the blast
tube.
For boilers with a water-cooled frontpiece, a refractory lining 2)-
5) (Fig. 10) is not necessary, unless expressly requested by the
boiler manufacturer.
5.6
Securing the burner to the boiler
Separate the combustion head from the rest of the burner, (Fig. 10).
Remove the screw 13) and extract the casing 14).
Disengage the articulated coupling 4) from the graduated
sector 5).
Remove the screws 2) from the two slide bars 3).
Remove the screw 1) and draw the burner back on the slide
bars 3) by about 100mm.
Disconnect the wires from the probe and the electrode and
then pull the burner completely off the slide bars, after
removing the split pin from the slide bar 3).
Fix the flange 9) (Fig. 10) to the boiler plate inserting the
supplied insulating gasket 6) (Fig. 10).
Use the 4 screws, also supplied with the unit, after protecting
the thread with anti-locking product.
Blast tube 10)
•
short
255
•
long
390
Prepare a suitable system to lift the burner.
WARNING
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. 12.
WARNING
The seal between burner and boiler must be
airtight.
Carry out all installation work and mount the cas-
ing again.
13
14
2
1
3
7
8
9
4
6
10
11
12
15
100
5
L
Fig. 10
D11482
