Supplied By www.heating spares.co Tel. 0161 620 6677
25
DOMINA PLUS F 24 - 30 E
FERELLA EXTRA F 24 - 30 MEL
Version - 09.2002
Fume ducts
The unit is "type C" with an airtight chamber and forced draught, the air inlet and fume outlet must be connected
to one of the following extraction/suction systems. With the aid of the tables and methods of calculation
indicated, before commencing installation, it is first necessary to check that the fume ducts do not exceed the
maximum permissible lengths. The current standards and local regulations must be observed.
This C-type unit must be installed using the fume exhaust and suction ducts supplied by FERROLI
S.p.A. in accordance with UNI-CIG 7129/92. Failure to use them automatically forfeits all warranty and
liability of FERROLI S.p.A.
Diaphragms
Boiler operation requires fitting the diaphragms supplied with the unit as instructed in the following tables. As
the resistance of the fume ducts changes, the diaphragms make it possible to keep the combustion parameters
(CO
2
, etc.) within the optimum operating range. Note that with low-resistance fume ducts, a high-resistance
diaphragm (small hole diameter) is used and vice versa.
Choosing the diaphragm using
separate pipes
Choosing the diaphragm using coaxial
pipes
Type
Coaxial
60/100
Length up to:
1 bend + 1 metre
1 bend + 3 metres
1 bend + 3 metres
1 bend + 4 metres
1 bend + 5 metres
Diaphragm
to use
50 mm
No diaph.
45 mm
50 mm
No diaph.
Coaxial
80/125
F 24
F 30
52 mm
No diaph.
50 mm
No diaph.
No diaph.
Pipe length
calculated in
linear metres
Diaphragm
to use
45 mm
47 mm
50 mm
No diaph.
Min
0 m
13 m
23 m
38 m
Max
13 m
23 m
38 m
48 m
F 24
F 30
47 mm
50 mm
52 mm
No diaph.
Diaphragm
to use
Min
0 m
20 m
35 m
45 m
Max
20 m
35 m
45 m
50 m
Pipe length
calculated in
linear metres
Boilers are fitted as
standard with the
smallest diaphragm in
the series.
Before inserting the fume outlet pipe, it is therefore
necessary to check there is the right diaphragm
(when it is to be used) and that it is correctly
positioned.
Changing the diaphragm
If inserting or changing a diaphragm, it is necessary to
remove the fan assembly, take out the fume coupling 1 and
insert the required diaphragm
2
.
Ø
N.B.:
The diameter
of the hole Ø
is stamped
on the
diaphragm
2
1
.
.
