Siemens LF 157 GA 70 Instrucciones De Uso Y De Montaje página 13

Operating Instructions
Exhaust-air mode:
- The extractor-hood fan extracts the
kitchen vapours and conveys them
through the grease filter into the
atmosphere.
- The grease filter absorbs the solid
particles in the kitchen vapours.
- The kitchen is kept almost free of
grease and odours.
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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 ade-
quate 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).
This can be achieved if combustion air
can flow through non-lockable openings,
e.g. in doors, windows and via the air-
intake/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-int ake/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.
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