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5.4
Operating position
The burner is designed to operate only in
positions 1, 2, 4 and 5 (Fig. 14).
Installation 1 is preferable, as it is the only
one that allows the maintenance operations
WARNING
as described in this manual.
Installations 2, 4 and 5 allow operations to be
performed, but make maintenance and
inspection of the combustion head more diffi-
cult.
All the positions require the installation of the
gas valve with coils facing upwards or hori-
zontally (Fig. 14).
1
D7796
5.5
Preparing the boiler
5.5.1
Boring the boiler plate
Pierce the closing plate of the combustion chamber, as in
(Fig. 15).
The position of the threaded holes can be marked using the ther-
mal insulation screen supplied with the burner.
W 1
D X 2
R
mm
D1
RX 180-250 S/PV
170
The burners cannot be used on flame inversion
boilers.
WARNING
It is possible to insert a protective device made of refractory
material between the combustion head and the boiler refractory.
This protective device must allow the blast tube to be taken out
(Fig. 16).
20160576
2
20145512
W1
R
DX2
DX1
224
M 8
94
70
Installation
Any other position could compromise the cor-
Installation 3 is prohibited for safety reasons.
Installation with the coils pointing downwards
DANGER
3
Do not insert the protection in line with the elec-
trode unit, as this would compromise its good op-
eration.
WARNING
20050572
Fig. 15
5.5.2
Head length
The length of the head must be selected according to the indica-
W6
tions provided by the manufacturer of the boiler, and in any case
45°
it must be greater than the thickness of the boiler door complete
with its fettling.
Tab. L
The range of lengths available, L (mm), is as follows:
mm
RX 180-250 S/PV
22
GB
rect operation of the appliance.
is absolutely forbidden.
4
Zona di non combustione
5
Fig. 14
Fig. 16
160
Tab. M
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