Structure And Function; Overview - Siemens FDA241 Technical Manual

3 Structure and function

3.1
Building Technologies
Fire Safety

Overview

Aspirating smoke detectors are used for early detection of smoke-generating fires
in rooms and equipment. They are especially suited to applications in which point
detectors are pushed to their limits, cannot be used or can only be used with
restrictions.
The aspirating smoke detector continually takes air from the monitored room using
a connected pipe system with defined aspirating holes. The air is supplied to the
detection chamber and is analyzed for smoke particles using the detector installed
there. The sensitivity of the detector can be adjusted.
The position and size of the aspirating holes are calculated with the 'FXS2055 ASD
Asyst Tool' software. The calculation ensures that the air passes from the
aspirating hole to the detector in the time specified and with the required calculated
sensitivity.
Examples of application
Cavities such as false ceilings or false floors

Rooms with polluted air, in which the pollution has impaired the performance of

optical point detectors
Clean rooms

Rooms the height of which is greater than that permitted for point detectors

Rooms with electromagnetic fields which influence the function of point

detectors
Large rooms up to 800 m²

Separate monitoring of control cabinets and electronics cabinets

Data centers

Telecommunication centers

Mounting lines

Cable tunnels

Conveyor belts

Structure and function
Overview
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2015-09-29
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