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5.6
Operating position
The burner is set up to operate only in positions 1, 2, 3 and 4.
Installation 1 is preferable, as it is the only one that allows the
maintenance operations as described in this manual.
Installations 2, 3 and 4 allow operation but make maintenance
and inspection of the combustion head more difficult, page 29.
5.7
Boiler plate
Pierce the closing plate of the combustion chamber, as in
(Fig. 11). The position of the threaded holes can be marked using
the thermal insulation screen supplied with the burner.
mm
RL 28/M
160
RL 38/M
160
RL 50/M
160
5.8
Blast tube length
The length of the blast tube 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
RL 28/M
7)(Fig. 12):
• short
241
• long
351
For boilers with front flue passes 10)(Fig. 12) or flame inversion
chambers, a protection in heat-resistant material 8) must be
inserted between the boiler refractory 9) and the blast tube 7).
This protection must not compromise the extraction of the blast
tube.
For boilers with a water-cooled front piece, a refractory lining 8)-
9)(Fig. 12) is not necessary, unless expressly requested by the
boiler manufacturer.
20167399
1
2
A
B
224
224
224
D455
RL 38/M
RL 50/M
241
351
Installation
ATTENTION
3
5.9
Securing the burner to the boiler
C
Remove blast tube 7) from the burner 4)(Fig. 12) and proceed as
M 8
follows:
M 8
Remove the screws 2) from the two slide bars 3).
M 8
Remove the screw 1) retaining the burner 4) to the flange 5).
Remove the blast tube 7) complete with flange 5) and slide
Tab. G
bars 3).
Fix the flange 5) to the plate of the boiler interposing the seal 6)
supplied with the unit. Use the 4 screws, also supplied, after
protecting their thread with an anti-locking product.
Fig. 11
ATTENTION
241
351
16
GB
Any other position could compromise the correct
operation of the appliance.
The installation 5 is prohibited for safety reasons.
4
5
D3928
Provide an adequate lifting system of the burner.
The seal between burner and boiler must be
airtight.
Fig. 10
D854
Fig. 12
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