Planning
ASD 531, Technical description, T 140 416 en
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4.3.2
Planning without “ASD PipeFlow” calculation
If planning is performed
without
“ASD PipeFlow”, a number of switch settings in the ASD 531 are saved with pre-defined val-
ues which are necessary for actuation in compliance with EN 54-20, Class A–C.
Notice: Planning without “ASD PipeFlow” calculation
•
Sampling pipe networks are principally arranged symmetrically (including sampling holes). Any deviation in
symmetry must not exceed ±10%.
•
The maximum tube lengths and number of sampling holes specified in Sec. 4.4.4.2 must not be exceeded.
•
Only the tube materials listed in document T 131 194 with a diameter of 25 mm are to be used (including
flexible hose).
•
A
maximum of two 90° angles
may be used per sampling pipe. Any other changes of direction that may be
necessary in the sampling pipe are to be implemented with 90° bends.
•
A maximum of one filter-box (FBX) or one extra large DFU 535XL dust filter unit and one water retaining box
(WRB) can be used in the tube network.
•
When using other tube and accessory parts (e.g. more than two 90° angles, flexible tubes, dirt trap boxes), it
is imperative that you use the “ASD PipeFlow” calculation software.
•
The “ASD PipeFlow” calculation software must be used when planning equipment monitoring.
•
The “ASD PipeFlow” calculation software must also be used in applications with air recirculation.
4.4
Space surveillance
4.4.1
Space surveillance applications
The ASD 531 aspirating smoke detector can also be used for the following applications:
•
Spaces where point detectors are difficult to mount due to poor accessibility, e.g.:
-
cable galleries, cable tunnels, false ceilings, hollow floors
-
machine halls, production halls
-
low and high voltage rooms
-
computer rooms, clean rooms
•
Spaces where, for aesthetic reasons, point detectors should not be mounted, e.g.:
-
Protection of cultural assets
-
Museums
•
Spaces where point detectors could be damaged, e.g.:
-
Prison cells
-
public passageways
•
Spaces with localised smoke development, e.g.:
-
warehouses with diesel forklifts
•
Spaces with a high level of dust pollution and/or high atmospheric humidity.
Notice
Applications with a high level of dust and/or high atmospheric humidity require the use of accessory parts as rec-
ommended by the manufacturer, e.g.: Filter-box/filter unit, dirt trap box, water retaining box or three-way tap for
sporadic cleaning of the sampling pipe with compressed air (see also Sec. 5.5.12).
