20034293
16
GB
Installation
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.
The range of lengths available, L (mm), is as follows:
Tab. I
For boilers with front flue passes 15)(Fig. 10) or flame inversion
chambers, protective fettling in refractory material 13) must be in-
serted between the boiler fettling 14) and the blast tube 12).
This protective fettling must not compromise the extraction of the
blast tube.
For boilers having a water-cooled front the refractory fettling 13)-
14)(Fig. 10) is not required unless it is expressly requested by the
boiler manufacturer.
5.7
Securing the burner to the boiler
Detach the combustion head from the burner:
disconnect the hoses by unscrewing the two connectors
6)(Fig. 10).
Disengage the articulated coupling 7) from the graduated
sector 8).
Loosen the 4 screws 3) and remove the cover 1).
Remove the screws 2) from the slide bars 5).
Remove the 2 screws 4) and pull the burner back on slide
bars 5) by about 100 mm.
Disconnect the electrode wires and then pull the burner
completely off the slide bars.
Secure the sleeve with flange 11) to the boiler plate, inter-
posing the thermal insulating screen 9) supplied with the
burner.
Use the 4 screws, also supplied with the unit, after first pro-
tecting the thread with an anti-locking product.
5.8
Nozzles
The burner complies with the emission requirements of the
EN 267 standard.
In order to guarantee that emissions do not vary, recommended
and/or alternative nozzles specified by Riello in the Instruction
and warning booklet should be used.
Short
Long
RLS 250/M MZ
418
548
WARNING
The seal between burner and boiler must be air-
tight.
Fig. 10
D8911
WARNING
It is advisable to replace nozzles every year
during regular maintenance operations.
CAUTION
The use of nozzles other than those specified by
Riello S.p.A. and inadequate regular maintenance
may result into emission limits non-conforming to
the values set forth by the regulations in force, and
in extremely serious cases, into potential hazards
to people and objects.
The manufacturing company shall not be liable for
any such damage arising from nonobservance of
the requirements contained in this manual.
Summary of Contents for RLS 250/M
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