Planning; Fields Of Application; General Planning Information - Siemens FDL241-9 Technical Manual

Planning

4

Fields of application

4 Planning
4.1
4.2
34
Building Technologies
Fire Safety
Fields of application
Typical fields of application of the linear smoke detector
Application area
Buildings with historically valuable ceilings
Atriums, detection on multiple levels
Large rooms and high halls
Churches
Long corridors, cable and energy ducts with
a room height of more than 3 m
Airplane hangars with stable building
construction, in which flame detectors alone
do not suffice
Saw-tooth roofs, where point detectors must
be suspended lower
Examples of fields of application of the linear smoke detector

General planning information

Between the detector and the reflector therer must be permanent, undisturbed

visual contact.
– The infrared ray must not be interrupted by moving objects, e.g. cranes,
ladders, transportable objects, cobwebs.
– Vision impaired by dust, vapor or smoke generated as a result of operation
may impair the system.
The detector's installation location must be absolutely statically stable, as the

admissible deviation of the infrared ray is max. 0.1°. Examples:
– Concrete and brick walls are suitable.
– Wood and steel girder constructions are unsuitable, as temperature and
humidity fluctuations, wind or snow pressure influence on such
constructions.
The detector and reflector must be securely installed on the installation surface.

In the case of detection distances greater than 50 m, position the detector and

reflector as close to opposite one another as possible. This makes adjustment
easier.
Position the detector near the ceiling, as the smoke is generally only sufficiently

think to trigger an alarm in the mushroom cloud.
Avoid bringing the detector into direct contact with sunlight, halogen lights etc.

Reason
Fire detector installation on ceilings is not
desirable or possible.
Point detector unaccessible due to height
Smoldering fire detection not possible with
point detectors
Lower investment costs
No impairment of the ceiling by installation
or point detectors
Lower investment costs
Lower investment costs
Lower investment costs
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2012-09-07