Miele DA 420 V EXT Betriebs- und Installationsanleitung - Seite 30
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Connection for air extraction
Important: To avoid the danger of
toxic fumes, please observe the
Warning and Safety instructions.
This is especially crucial when using
the cooker hood at the same time as
another heating appliance which
relies on air from the same room.
The cooker hood should be installed
according to local and national
building regulations. Seek approval
from the building inspector where
necessary.
– All ducting, pipework and fittings
must be of non-flammable materials.
– The exhaust ducting should be as
short and straight as possible.
– To ensure efficient air extraction, the
diameter of the exhaust ducting
should not be less than 150 mm.
If exhaust ducting with a diameter of
less than 150 mm, or if flat ducting is
used, the noise level of the cooker
hood will increase and extraction will
be less efficient.
Only reduce the diameter of the
ducting if absolutely necessary, e.g.
where narrower ducting has already
been installed.
– Only use wide radius bends. Tight
bends reduce the air throughput of
the cooker hood.
– Only use smooth pipes or flexible
hoses made from non-flammable
materials for extraction connection.
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– Where ducting is horizontal, it must
be laid to slope away at at least 1 cm
per metre.
This is to ensure that condensate
cannot drain back into the cooker
hood.
– If the exhaust air is to be ducted into
the open air, the installation of a
telescopic wall vent is recommended.
– If the exhaust air is to be ducted into
a vent flue, the ducting must be
directed in the flow direction of the
flue.