Accorroni MEC25-85 Technical Information page 8

1.7 FIELDS OF USE
MEC and MEC C air heaters can be used to build
modular plants, consisting of one or more
appliances, to meet the heating requirements of
small spaces such as artisan laboratories, etc., up
to large volumes, such as industrial sheds,
warehouses, churches and sports facilities.
Therefore, the heat dispersion of the building
must be calculated as well as the required heating
power, selecting the number and type of air
heaters in relation to the values, such as: air flow
and throw, head available when using distribution
ducts, effective coverage of the areas to be
heated, any air changes, etc.
The MEC and MEC C air heaters are built for
installation in rooms, whether they are specially
designed for the appliances (technical room) or
other activities (i.e. directly inside the environment
to be heated). The quality and the dimensions of
the materials used have been chosen to guarantee
a reasonable service life and are suitable to
operate the appliances, both in their entirety and
relative to their parts, provided that the appliances
are professionally installed and are subjected to
mechanical, chemical and thermal stress
conditions corresponding to normal use.
The air heater must not be installed under
conditions for which it was not specifically designed,
e.g. where the atmosphere is highly corrosive or
salty.
For "open" outdoor installations, it is
necessary to use the MEC EX series air
heaters, which go beyond the scope of this
manual and which have been specifically
designed and built for this purpose.
Based on what is prescribed by the current
installation standards, the MEC and MEC C air
heater applications may be summarised as follows:
- MEC series air heaters with axial, free-delivery
fans can be used if there are no special air
distribution problems or there are no physical
obstacles to obstruct such distribution, such as
partitions, shelving or bulky machinery, etc. In
these cases, the effective coverage of the areas
to be heated must be evaluated in relation to the
air throw of the appliances
- MEC C air heaters with ductable centrifugal
fans can be used for the cases in which, unlike
what was described in the previous paragraph,
it is not possible to serve the desired area
efficiently with the free air delivery. The MEC C
air heaters are also suitable if a filter must be
applied to the air intake (in fact, centrifugal fans
are needed due to the load losses induced by
that filter) and/or a change is required with
outdoor air, to be conveyed by ducts.
WARNING! It is important to verify that the
design and installation conform with current
standards. Ensure that the environment in
which the air heater will be installed will not
create a hazard, i.e. where excessive (vola-
tile) dust, flammable or corrosive substances
and/or vapours and combustible materials
may be present.
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