Incite Fire ASD 532, Operating Manual

Page: 39 / 121

Planning
39 / 121
4.4.2 Principles of space surveillance
Notice
The following principles apply to space monitoring:
•
The number and arrangement of the ASD 532 units are based on the size of the space.
•
In general the monitoring areas are the same as for point-type detectors. Guidelines that apply to specific ob-
jects – e.g. high-rack storage buildings – must be observed.
•
The sampling pipe tube networks are to be laid out in such a way that any anticipated fire is detected in its ini-
tial stages.
•
The aspirating smoke detectors should be positioned in such a way that false alarms are avoided.
•
When planning without “ASD PipeFlow” calculation, make sure the sampling pipe tube networks are laid out
symmetrically (including sampling holes). Any deviation in symmetry must not exceed ±10%.
•
When planning without “ASD PipeFlow” calculation, the maximum tube lengths and number of sampling
holes specified in Sec. 4.4.4.3 must not be exceeded.
•
90° bends are to be used instead of 90° angles for any changes in direction. An excessively high number of
direction changes significantly affects detection time.
•
When planning without “ASD PipeFlow” calculation, do not use more than a maximum of two 90° angles
per sampling pipe. Any other changes of direction that may be necessary in the sampling pipe are to be im-
plemented with 90° bends.
•
The minimum sampling pipe length is 1 m for all applications.
•
Several rooms may be monitored by one and the same aspirating smoke detector only if so permitted by the
relevant guideline (e.g. DIN VDE 0833-2 in Germany, VKF in Switzerland).
•
For space surveillance involving premises with a height of more than 16 m, the situation must first be clarified
beforehand with the manufacturer, the insurance companies and, if necessary, the fire brigade (in some cases
larger or higher monitoring areas are possible).
ASD532 Operating Manual