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5.4
Operating position
The burner is designed to operate only in
positions 1 , 2 , 3 and 4 (Fig. 9).
Installation 1 is preferable, as it is the only
WARNING
one that allows the maintenance operations
as described in this manual.
Installations 2 , 3 and 4 permit operation but
make maintenance and inspection of the
combustion head more difficult.
1
D7739
5.5
Preparing the boiler
5.5.1
Boring the boiler plate
Pierce the closing plate of the combustion chamber, as in Fig. 10.
The position of the threaded holes can be marked using the ther-
mal insulation screen supplied with the burner.
5.5.2
Blast tube length
The length of the blast tube 12)(Fig. 11) must be selected accord-
ing to the indications provided by the boiler manufacturer, and in
any case must be greater than the thickness of the boiler door
complete with its refractory.
The available lengths are the ones indicated in Tab. H.
Blast tube
RS 150
For boilers with a front flue gas passes 15)(Fig. 11) or flame in-
version chamber, a protection device in refractory material 13)
must be inserted between the boiler fettling 14) and the blast tube
12).
This protective fettling must not compromise the
extraction of the blast tube.
WARNING
For boilers with a water-cooled frontal, a refractory lining 13)-14)
is not necessary unless expressly requested by the boiler manu-
facturer.
2
Short
Long
280mm
415mm
Installation
Any other position could compromise the cor-
Installation 5 is prohibited for safety reasons.
DANGER
3
4
mm
RS 150
Tab. H
15
GB
rect operation of the appliance.
5
D455
A
B
195
275-325
Fig. 9
Fig. 10
C
M12
Tab. I
20054100
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