HomeMatic HmIP-SWSD, Mounting Instruction And Operating Manual, Page: 48 / 65

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Start-up
transformers or halogen lamp cable systems, as
well as fluorescent lamps or energy-saving lamps
and in particular to its ballasts (minimum distance
50 cm)
• garages (exhaust emissions)
• dusty and dirty rooms (measuring chamber gets
dirty quickly or false alarms are triggered)
• in the vicinity of windows, ventilators, fans or any
other locations where the air moves around a lot
• in the vicinity of areas where people smoke
• in the vicinity of solid steel beams, large metal
surfaces, etc. as they could significantly inhibit the
transmission or receipt of the wireless signal. Mov-
ing the alarm by just a few centimetres can often
help.
5.2.4 Flat ceilings
The smoke alarm must be mounted on the ceiling in the
centre of a room. Keep a minimum distance of 50 cm to
the walls and corners of the room to avoid a build-up of
air that stops the rising smoke.
If rooms are separated by joists (divisions) into ceiling
panels with a hight greater that 20 cm, one smoke alarm
per ceiling surface has to be installed if the area is greater
than 36 m².