WAGNER TITANUS, Техническое руководство, Страница: 59 / 208

TITANUS MICRO·SENS
®
Pipe Design
MS_A_04-en-e Data: 01/09
4 – 9
4.1.4 Sensitivity
According to EN 54-20, the sensitivity of a air sampling smoke detection
system can be divided into particular fire sensitivity classes. These sensi-
tivity classes describe particular example applications in which the sys-
tems can be used. Permissible system project planning can be deter-
mined for each classification according to Chapter 4.2.
Air sampling smoke detection systems with a higher sensitivity class ac-
cording to EN 54-20 also meet the requirements of the lower classes.
Class Description Example application
A
Air sampling smoke de-
tector with very high
sensitivity
Very early detection:
Highly diluted smoke in air
conditioned IT areas
B
Air sampling smoke de-
tector with increased
sensitivity
Early detection:
Diluted smoke in conventional
cooled IT areas.
C
Air sampling smoke de-
tector with standard
sensitivity
Standard detection:
Fire detection with the benefits of air
sampling smoke detection systems
The fire sensitivity classes A, B and C can be achieved with each de-
tection unit available, depending on the number of aspiration apertures.
The following sensitivities can be adjusted with the different detection units.
sensitivity sensitivity
Standard
adjustment
levels
detection unit
DM-TM-10 0,1 - 2 % /m 0,1 % /m
0,1 % /m
detection unit
DM-TM-50 0,5 - 2 % /m 0,5 % /m
0,1 % /m
Project planning for the monitored surface is always carried out accord-
ing to national specifications for point-shaped smoke detectors.
INSTRUCTION