To maintain the greatest possible security against false alarms, classes A1 and A1R should not
be selected for room heights below 6 m, although these classes are in theory permitted.
Furthermore, the expected application temperature must be taken into consideration.
Temperature
rate-of-rise [K
min
-1
]
Response time for detectors in the
sensitivity class A1R
Response time for detectors in the
sensitivity classes A2R/BR
Lower limiting
value [min/sec]
Upper limiting
value [min/sec]
Lower limiting
value [min/sec]
Upper limiting
value [min/sec]
10
1 min
4 min 20 s
2 min
5 min 30 s
20
30 s
2 min 20 s
1 min
3 min 13 s
30
20 s
1 min 40 s
40 s
2 min 25 s
Automatic Fire Detectors LSN
improved
Programming | en
15
Bosch Sicherheitssysteme GmbH
Operation Guide
12/2012 | 8.1 | F.01U.003.448
Summary of Contents for FAH-420
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