Ferroli Domina F 24-30 E Technical Manual page 25

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 (CO2, 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 coaxial
pipes
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.
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.
Version - 09.2002
Supplied By www.heating spares.co Tel. 0161 620 6677
DOMINA F 24 - 30 E
FERELLA F 24 - 30 MEL
MILOS AIR COMPACT E
Choosing the diaphragm using sepa-
rate pipes
2
.
1
.
25