Miele DA 420-4, Operating And Installation Manual

Page: 29 / 40

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.
– Only use smooth pipes or flexible
hoses made from non-flammable
materials for the extraction ducting.
– When using an external motor, make
sure that the exhaust ducting is
sufficiently rigid. The external motor
can cause an underpressure which
could result in the exhaust ducting
distorting.
To achieve the greatest possible air
extraction with the lowest noise level,
please note the following:
– To ensure efficient air extraction, the
diameter of the exhaust ducting
should not be less than 150 mm.
– If flat ducting is being used, the
cross-sectional area must not be
smaller than the cross-sectional area
of the exhaust connection.
– The exhaust ducting should be as
short and straight as possible.
– Only use wide radius bends.
– The exhaust ducting should not be
kinked or compressed.
– Ensure that all connections are
strong and airtight.
– 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.
Connection for air extraction
29