Riello RLS 28/E, Installation, Use And Maintenance Instructions

Page: 21 / 41

19 20059594 GB
Installation
4.4.2 Blast tube length
The length of the blast tube must be selected according to the indi-
cations provided by the manufacturer of the boiler, and it must be
greater than the thickness of the boiler door complete with its insu-
lation.
The range of lengths available, L (inch), is as follows:
For boilers with front flue passes 13)(Fig. 12) or flame inversion
chambers, protective insulation 11) must be inserted between the
boiler refractory 12) and the blast tube 10).
This protective insulation must not compromise the extraction of
the blast tube.
For boilers having a water-cooled front the insulation 11)-12) is not
required unless it is required by the boiler manufacturer.
4.5 Securing the burner to the boiler
Detach the combustion head from the burner (Fig. 12):
➤ remove screw 14) and withdraw the cover 15);
➤
disconnect the oil pipes by unscrewing the two connectors 4);
➤ remove the screws 2) from the slide bars 3);
➤
remove screw 1) and pull the burner back on slide bars 3) by
about 4”.
➤
Disconnect the electrode wires and then pull the burner com-
pletely off the slide bars.
➤
Secure the flange 9) to the boiler plate, inserting the gasket 6).
➤ Use the 4 screws, also supplied with the unit, after first pro-
tecting the thread with an anti-locking product.
➤ The seal between burner and boiler must be airtight.
4.6 Nozzle
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.
4.6.1 Choice of nozzles for 1
st
and 2
nd
stage
Both nozzles must be chosen from among those listed in Tab. I at
page 20.
The first nozzle determines the delivery of the burner at low fire.
The second nozzle works together with the 1st nozzle to determine
the delivery of the burner at high fire.
The deliveries at low and high fire must be contained within the val-
ue range indicated on page 6.
Model
L
(short blast tube)
L
(long blast tube)
RLS 28/E
7
1
/
2
“ 12
27
/
32
“
14
1
15
2 3
4
9
6
10
13
13
11
12
L
7
5
8
4"
D10465
Fig. 12
WARNING
It is advisable to replace nozzles every year during
regular maintenance operations.
CAUTION
The use of nozzles other than those specified by the
Manufacturer 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.
WARNING
Use nozzles with a 60° spray angle at the recom-
mended pressure of 174 PSI.
The two nozzles usually have equal deliveries.