Connection For Air Extraction; Non-Return Flap - Miele PUR 98 D Manual

Installation

Connection for air extraction


If the cooker hood is used at the
same time as a heating appliance
that relies on oxygen from the same
room, there is a risk in certain
circumstances of toxic fumes
building up.
It is essential that the „Warning and
Safety" instructions are observed.
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
exhaust ducting made from
approved non-flammable materials
for exhaust ducting.
To achieve the most efficient air
throughput with the lowest noise levels,
please note the following:
- The diameter of the exhaust ducting
must not be smaller than the cross-
section of the exhaust duct (see
"Appliance dimensions"). This applies
in particular when using flat ducting.
- 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.
- All connections must be strong and
airtight.
- If the exhaust ducting has flaps,
these must be opened whenever the
cooker hood is switched on.
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Any constriction of the air throughput
will reduce extraction performance
and increase operating noise.
Flue
If the exhaust air is to be ducted into a
flue, the ducting must be directed in the
flow direction of the flue.
If the flue is used by several ventilation
units, the cross-section of the flue must
be large enough.

Non-return flap

 Use a non-return flap in the exhaust
system.
A non-return flap ensures that when the
cooker hood is not in operation, the
duct is closed to prevent unwanted
exchange of room air and outside air.
If the exhaust is ducted through an
outside wall, a Miele wall vent or roof
vent (available as an optional
accessory) is recommended. Both of
these have a built-in non-return flap.
If the on-site ventilation system does
not have a non-return flap, one is
supplied with the cooker hood.
The non-return flap is fitted in the
exhaust socket of the fan.