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

Conventional Aspiration smoke detector
A concealed pipe system for area monitoring can be realized by installing in a false ceiling.
This requires the use of ceiling lead-throughs in the false ceiling. The ceiling lead-through can
be used with a false ceiling thickness of up to approx. 35 mm.According to the planning and
design guidelines, the ceiling lead-throughs are fitted with aspiration reducing film sheets with
defined air sampling openings and connected to the pipe system by means of aspiration
hoses.
If these hoses do not exceed a maximum of 3 m in length, the plan according to Planning
applies.If structural circumstances dictate that lengths in excess of 3 m are used, the pipe
system has to be calculated accordingly.
3.6.4

Air-return pipe for pressure areas and atmospheric loads

FAS / FCS
P1
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. The air-
return pipe can serve to equalize pressure or to prevent atmospheric loads (e.g. odors) in
neighboring spaces.
FCS-320-TM with air-return pipe
The air-return pipe is installed in the conical pipe connection for the air return of the FCS-320-
TM. 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.
3.6.5

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.
Bosch Sicherheitssysteme GmbH
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1
2
P2
2
Operation guide
Technical specifications | en
P1/P2 Pressure areas 1 and 2
1 Air-return pipe
2 Pipe system
1 Smoke aspiration pipe
2 Air-return pipe
2020.04 | 2.1 | F.01U.130.928
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