9
2.2.4 - VENTILATION
Boiler model
IVEN B60 TN 24
have an open
combustion chamber and have been desi-
gned for connection to a chimney: the com-
bustion air is taken
directly from the room
in which the boiler is installed.
The boiler must be installed in a suitable room
pursuant to applicable standards and laws
which shall be considered as having been
transcribed in full in this manual.
2.2.5 - FLUE GAS DISCHARGE
SYSTEM
NATURAL DRAUGHT BOILER
Connection to the chimney
The chimney is indispensable for the correct
functioning of the boiler; it must therefore con-
form with the following requirements:
-
it must be made from waterproof material
and be resistant at the temperature of the
flue gas and relative condensate;
-
it must have sufficient mechanical stren-
gth and low thermal conductivity;
-
it must be perfectly sealed to prevent co-
oling due to parasite air inlets;
-
it must be as vertical as possible and the
end section must have a chimney cap whi-
ch guarantees efficient and constant remo-
val of the combustion products;
-
the chimney must have a larger diameter
than that of the boiler’s draught stop; for
chimneys with a square or rectangular sec-
tion, the internal section must be 10% lar-
ger than the section of the connection duct
to the draught stop;
-
starting from the draught stop, the duct fit-
ting must have a vertical section of more
than twice the diameter before joining the
chimney.
Direct emission into the atmosphere
Natural draught boilers can discharge combu-
stion products directly into the atmosphere
using a duct which goes through the outside
walls of the building connected to a flue
exhaust terminal.
The exhaust duct must also comply with the
following requirements:
-
the sub-horizontal part inside the building
must be as short as possible (no more than
1.000 mm);
-
for boiler with vertical discharge, such as
boiler
IVEN B60 TN 24
, there must be no
more than 2 direction changes;
-
it must receive the discharge from a single
boiler;
-
the part going through the wall must be pro-
tected by a sheath duct; the part of the
sheath duct facing the inside of the buil-
ding must be closed and the part facing
outwards must be open;
-
the final section, on which the draught ou-
tlet will be fixed, must protrude from the
wall of the building for a length of a least
twice the diameter of the duct;
-
the draught outlet must overlap the con-
nection to the boiler exhaust duct connec-
tion by at least 1.5 metres (see fig. 6)
Installation info
Boiler model
IVEN B60 TFS 24
have a sea-
led combustion chamber with reference to
the environment in which it is installed, so no
special measures need be taken as regar-
ds ventilation for the combustion air.
This is valid also for the room the boiler will
be installed in.
The boiler must be installed in a suitable room
pursuant to applicable standards and laws
which shall be considered as having been
incorporated in full in this manual.
