Miele DA 249-4 Alu Operating And Installation Instructions - Page 33
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Important: To avoid the danger of
toxic fumes, please observe the
Warning and Safety instructions.
This is especially crucial when using
the rangehood at the same time as
another heating appliance which
relies on air from the same room.
The rangehood should be installed
according to local and national
building regulations. Seek approval
from the building inspector where
necessary.
Connection for air extraction
– Only use smooth pipes or flexible
hoses made from non-flammable
materials for extraction connection.
– When using an external motor, make
sure that the extraction ducting is
sufficiently rigid. The external motor
can cause an underpressure which
can result in the exhaust ducting
distorting.
To achieve the greatest possible air
extraction with the lowest noise level,
please note the following:
– The diameter of the exhaust ducting
should not be less than 150 mm.
– If flat ducting is being used, the
diameter must not be smaller than
the diameter of the exhaust
connection.
– If exhaust ducting with a diameter of
less than 150 mm, or if flat ducting is
used, the noise level of the
rangehood will increase and
extraction will be less efficient.
– 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 rangehood.
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