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004779194 - 14/03/2023
6.4 Combustion air
6.4.1
Outside air intake
The appliance must have the right flow of com-
bustion air to guarantee proper combustion.
There must be an outside air intake
(
Fig. 14
-
PA
) to guarantee the flow of
combustion air to the appliance and/or
recirculation of the ambient air.
PA
Fig. 14
The external air intake must be correctly sized
and protected by an insect-proof grate; it must
also be positioned in such a way as not to be ac-
cidentally obstructed. A non-closable permanent
protection grille must be placed externally; in
areas that are particularly windy and exposed to
weathering, install a rain and wind protection.
Make sure the air intake is positioned so that it is
not accidentally obstructed.
If the rear wall of the appliance is an external
wall, make a hole to extract the combustion air
20-30 cm from the ground, observing the size
indications indicated in “External air intake” of
section "Technical features" on page 54.
If it is not possible to make an external air intake
in the room, it is possible to make the external
hole in an adjacent room as long as it perma-
nently connects via passage grille (
Fig. 15
-
C
=
Container,
G
= Grille,
S
= Damper).
C
G
S
The image is purely indicative.
Fig. 15
If there are other heating or extraction
appliances in the installation room,
combustion malfunctions may occur
due to a lack of combustion air.
The combustion air intakes must
therefore be sized correctly, in order to
ensure the necessary supply of air for
the correct operation of all devices.
It is prohibited to withdraw combustion air from
a garage, warehouse containing combustible
materials or rooms at risk of fire.
If there is an insert IDRO V, the com-
bustion air must be taken from outside
the cladding to avoid fuel malfunctions
due to the lack of air caused by the
room fan.
