Connection For Air Extraction; Non-Return Flap - Miele DAD 4840 Operating And Installation Instructions

Installation

Connection for air extraction

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.
Any constriction of the air throughput
will reduce extraction performance
and increase operating noise.
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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.
Miele shall not accept warranty claims
for any functional defects or damage
caused by inadequate exhaust
ducting.