Siemens LF959BL90 - Manual (Page 38)

Prior to installation, always follow the
instructions and warnings in the chapter
entitled ”Safety instructions”!
Exhaust-air mode
The exhaust air is conveyed upwards via a
ventilation shaft or directly through the outer
wall to the exterior.
NOTE: The exhaust air must not be conveyed
into a functioning smoke or exhaust gas flue or
into a shaft which is used to ventilate
installation rooms which contain heating
appliances.
Before conveying the exhaust air into a
non-functioning smoke or exhaust gas flue,
obtain the consent of the appropriate heating
engineer.
Discharge exhaust air in accordance with
the official and statutory regulations (e.g.
regional building laws).
If the exhaust air is conveyed through the
outer wall, a telescopic wall box should be
used.
To ensure optimum performance, the
extractor hood requires:
– a short, straight exhaust air pipe and
– the largest possible pipe diameter.
If pipe bends cannot be avoided, ensure
the largest possible radii.
NOTE: If long, rough exhaust air pipes, a lot of
pipe bends or pipe diameters less than
150 mm are used, the air capacity will be less
than optimum and there will be an increase in
noise.
Use only pipes or hoses made of non-
combustible material for installation of the
exhaust air duct.
The manufacturer of the extractor hoods is
not responsible for complaints which can be
attributed to planning and design of the
pipework.
Connecting pipes
The diameter of the exhaust air pipes
should not be less than 150 mm.
Round pipes:
We recommend an inner diameter of
150 mm, however at least 120 mm.
Flat ducts must have the same inner cross-
section as round pipes.
There should be no sharp bends.
Ø 150 mm approx. 177 cm
2
Ø 120 mm approx. 113 cm 2
If pipe diameters differ:
Use sealing strips.
Connection of 150 mm ø exhaust air pipe
(recommended size)
Attach exhaust air pipe
directly to the air-pipe
connector and seal
appropriately. If using an
aluminium pipe, smooth the
connection area beforehand.
Connection of 120 mm ø exhaust air pipe
Attach reducing
connector directly to the air-
pipe connector.
Attach exhaust air pipe to
the reducing connector.
Seal both joints
appropriately.
Installation instructions
38