Siemens FDL241-9, Technical Manual

Page: 36 / 90

Planning 4
Planning in rooms with flat ceilings
36
Building Technologies
007016_i_en_--
Fire Safety 2012-09-07

Width of monitoring area (4): Define the width of the monitoring area and,
depending on this, the number of detectors. See [➙ 43]

Minimum distances (5): The infrared ray must be at least 30 cm away from
ceilings, walls, fittings and goods in stock to avoid unwanted reflections.

Distance between detector and ceiling (6): Define the distance between the
detector and the ceiling depending on the room height. See [➙ 43]

Installation surface: Define the installation surface given the architectural
circumstances. The installation surface must be stable and vibration-free.
See [➙ 45]
If the room has one or more of the following circumstances, you must also observe
further information.

Narrow spatial circumstances: Maintain the minimum distance (7) between two
detectors. See [➙ 47]

Girders: The detector can be installed in the ceiling panel between the girders
or below the girders. See [➙ 47]

Glass panes: Detection through glass panes and installation on glass panes
are only possible under certain circumstances. See [➙ 49]

Danger of moisture condensation: Use the detector heating unit if there is a
danger of moisture condensation. See [➙ 50]

Extraneous light: Use the extraneous light filter in the case of extremely strong
extraneous light. See [➙ 51]