Prior To Installation; Exhaust-Air Mode - Siemens LI2USB Notice De Montage

Prior to installation

Exhaust-air mode

The exhaust air is discharged upwards
through a ventilation shaft or directly through
the outside wall into the open.
Exhaust air should neither be directed
into a smoke or exhaust flue that is currently
used for other purposes, nor into a shaft that
is used for ventilating rooms in which stoves
or fireplaces are also located.
Exhaust air may be discharged in
accordance with official and statutory
regulations only (e.g. national building
regulations).
Local authority regulations must be observed
when discharging air into smoke or exhaust
flues that are not otherwise in use.
When the extractor hood is operated
in exhaust-air mode simultaneously with
a different burner which also makes use
of the same chimney (such as gas, oil or
coal-fired heaters, continuous-flow heaters,
hot-water boilers) care must be taken to
ensure that there is an adequate supply
of fresh air which will be needed by the
burner for combustion.
Safe operation is possible provided that the
underpressure in the room where the burner
is installed does not exceed 4 Pa (0.04
mbar).
10
This can be achieved if combustion air can
flow through non-lockable openings, e.g. in
doors, windows and via the airintake/
exhaust-air wall box or by other technical
measures, such as reciprocal interlocking,
etc.
If the air intake is inadequate, there is a
risk of poisoning from combustion gases
which are drawn back into the room.
An air-intake/exhaust-air wall box by itself is
no guarantee that the limiting value will not
be exceeded.
Note: When assessing the overall
requirement, the combined ventilation
system for the entire household must be
taken into consideration.
This rule does not apply to the use of
cooking appliances, such as hobs and
ovens.
Unrestricted operation is possible if the
extractor hood is used in recirculating mode
– with activated carbon filter.