Limits To Planning - Siemens FDA2 Series Planning, Mounting

4
Planning

Limits to planning

4.9 Limits to planning
34 | 48
Observe local regulations and specifications for the limits of the detection range of
the aspirating holes. The local regulations and specifications take priority over all
other information in this document. Observe the planning rules in the relevant
standards and guidelines.
The maximum monitored area depends on the topology selected and the total
maximum pipe length.
The maximum number of aspirating holes depends on the sensitivity and the class
A, B, or C (see software 'FXS2056 ASD Asyst‑Tool V3').
The minimum pipe length between two aspirating holes is 0.1 m. The maximum
gap between two aspirating holes is 10 m
The following limits are set for planning the pipe system depending on which
aspirating smoke detector is used.
Single pipe (I topology)
Detector Monitored area per
device [m
FDA221 max. 500
FDA241 max. 800
FDA261 max. 3600
(class A: 2000)
FDA262 max. 6700
(class A: 3000)
Branched pipes (U topology, double U topology)
Detector Monitored area per
device [m
FDA221 max. 500
FDA241 max. 800
FDA261 max. 3600
(class A: 2000)
FDA262 max. 6700
(class A: 3000)
Evidence of compliance with the planning limits is provided by the 'FXS2056 ASD
Asyst‑Tool V3' software.
Length of pipe
2
] system per air inlet
[m]
≤30
≤60
≤150
≤250
Length of pipe
2
] system per air inlet
[m]
≤2 × 25
U topology only
≤2 × 60 (U)
≤4 × 30 (double U)
≤800
≤1200
Max. number of
aspirating holes
per device
12
16
2 × 60
2 × 125
Max. number of
aspirating holes
per device
24
U topology only
32
2 × 60
2 × 125
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