Connection For Air Extraction - Miele DAR 1120 Operating And Installation Instructions

Connection for air extraction

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Before installation, it is important
to read the information given on the
following pages as well as the
"Appliance dimensions" and the
"Warning and Safety instructions" at
the beginning of this booklet. This is
particularly crucial when using the
rangehood at the same time as a
heating appliance that relies on
oxygen from the same room, which
could result in the build-up of toxic
fumes.
The rangehood should be installed
according to local and national
building regulations. Seek approval
from the building inspector where
necessary.
The rangehood is fitted with an exhaust
connection of  250 mm.
Only use smooth pipes or flexible
hoses made from non-flammable
materials for the extraction ducting.
To achieve the greatest possible air
extraction with the lowest noise level,
please note the following:
– The cross-section of the exhaust
ducting must not be smaller than the
cross-section of the exhaust
connection (see "Appliance
dimensions").
– The exhaust ducting should be as
short and straight as possible.
– Only use wide radius bends.
– The exhaust ducting must not be
kinked or compressed. When
selecting the exhaust ducting, ensure
that it is rigid enough to retain its
shape during operation.
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– Ensure that all connections are
strong and airtight.
Any constriction of the airflow will
reduce extraction performance and
increase operating noise.
 If the exhaust air is to be ducted into
a vent flue, the ducting must be
directed in the flow direction of the
flue.
 When 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.
 If the exhaust ducting is to run
through rooms, ceiling space etc.
where there may be great variations
in temperature between the different
areas, the problem of condensation
will need to be addressed. The
exhaust ducting will need to be
suitably insulated.