Air Intake And Flue Exhaust Ducts; Minimum Distances - Accorroni MEC25-85 Technical Information

50 cm 80 cm
recommended to combine the air heaters with
the installation of Arianne air mixers (see the
specific documentation), to optimise the
distribution of the air, ensuring the uniformity of
the temperature in the environment and ensuring
significant energy savings.
The appliance rests on two support brackets
(supplied on request in two separate versions for
the MEC and MEC C series) each equipped with
two attachment holes with a diameter of 14 mm.
WARNING! Make sure that the support
capacity of the wall where the brackets are
attached and the wall anchor system are
adequate for the weight of the appliance to
be installed (see the technical data table on
page 18).
If the support brackets are built differently, attach
the appliance as required respecting the proper
distance from the wall. This distance, measured
from the rear corner of the air heater housing,
must be at least 30 centimetres for the MEC
series and 40 centimetres for the MEC C series,
to ensure a correct air intake to the fan(s). For
this reason and to make maintenance easier, the
air heater must not be installed inside niches or
in positions where they are difficult to access. It
is recommended to respect the minimum
distances indicated in fig. 18.
Any combustible materials stored near the air
heater must be at least 1.5 metres away from the
appliance.
When installing MEC C ducted air heaters, it
should be recalled that, to perform
maintenance, there must be free access to
the front of the exchanger which contains

MINIMUM DISTANCES

80 cm
the fan and safety control thermostats.

4.3 AIR INTAKE AND FLUE EXHAUST DUCTS

4.3.1 Type definition
As already mentioned in point 1.1, the MEC and
MEC C air heaters can be installed with different
configurations of the air intake and combustion
product exhaust ducts and these different
solutions constitute the definition of "type".
The possible solutions are reported below in
relation to the CE certification for the appliances:
- Type C
The combustion circuit is hermetically sealed
with respect to the environment in which the air
heater is installed.
through the outside wall of the room, with
terminals close to each other (fig. 19).
- Type C
The combustion circuit is hermetically sealed
with respect to the environment in which the air
heater is installed.
Both types of ducts are connected to the outdoors,
but their terminals may also be located on walls
not in the room. The combustion products can
be exhausted also with a special duct on the roof
of the building (fig. 20).
WARNING! In the previous solutions (Type
C), the intake and exhaust ducts, including
the relative terminals, are considered by the
standards to be integral parts of the air
heater. Therefore, they must be requested
from A2B Accorroni E.G. S.r.l., together with
the appliance.
page 23
80 cm
12
The ducts pass directly
52
30 / 40 cm
Fig. 18