Air-Return Pipe For Pressure Areas And Atmospheric Loads; Water Separator For Humid Areas - Bosch FCS-320-TM Operation Manual

24 en | Technical Specifications
2.6.4

Air-Return Pipe for Pressure Areas and Atmospheric Loads

Figure 2.20 Principle of air return
If the aspirating smoke detectors and the pipe system are installed in areas with varying air
pressure, the aspirated air must be returned to the pressure area of the pipe system (see
Figure 2.20). The air-return pipe can serve to equalize pressure or to prevent atmospheric
loads (e.g. odors) in neighboring spaces.
Figure 2.21 FCS-320-TM with air return
The air-return pipe is installed in the conical pipe connection for the air return of the FCS-320-
TM (see Figure 2.21). It fits perfectly in the connection and guarantees a firm hold. When
using fire source identification, it is not permitted to connect an air-return pipe.
2.6.5

Water Separator for Humid Areas

If the smoke aspiration system is operated in environments where condensate can form in the
aspiration system, a water separator is used. Condensate can form with sharp temperature
fluctuations and in areas where fresh air is monitored. For areas with extremely high humidity,
the FAS-ASD-WS Water Separator can be used, for example.
The FAS-ASD-WS Water Separator is integrated at the lowest point in the pipe system
downstream of the air filter and the aspirating smoke detector. The 45° pipe elbow permits
optimum distance from the wall (see Figure 2.22).
F.01U.130.928 | 1.0 | 2009.11
FAS / FCS
1
P1
1
2
P2
2
Operation Guide
FCS-320-TM Aspirating Smoke Detector
P1/P2 Pressure areas 1 and 2
1 Air-return Pipe
2 Pipe System
1 Smoke aspiration pipe
2 Air-return Pipe
Bosch Sicherheitssysteme GmbH