Non-Return Flap; Condensate - Miele DA 3466 Operating And Installation Instructions

Installation
- All connections must be strong and
airtight.
- If the ducting has flaps, these must
be opened whenever the ventilation
hood is switched on.
Any constriction of the air throughput
will reduce extraction performance
and increase operating noise.
Ventilation stack
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 vent
system.
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 vent system does not have
a non-return flap, you can purchase one
as an optional accessory.
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Condensate

If the ducting is to run through cool
rooms or ceiling space, for example, the
significant variations in temperature
between the different areas can cause
condensate to form. Insulate the
ducting to reduce temperature
variations.
If the ducting is to be laid horizontally, it
must be laid with a downwards sloping
gradient of at least ³/₈" (1 cm) per meter.
This is to ensure that condensate
cannot drain back into the ventilation
hood.
In addition to insulating the ducting, it is
advisable to also install a condensate
trap for collecting and evaporating any
potential condensate.
Condensate traps for 5" (125 mm) or
6" (150 mm) diameter ducting are
available as optional accessories.
When installing a condensate trap,
ensure that it is positioned vertically
and as closely as possible to the