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12
en | Technical Specifications
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3.3
System Overview
The smoke aspiration systems comprise an aspirating detector and pipe system.
The aspirating smoke detector comprises the detector module for detecting the smoke
aerosols, the aspiration unit for transporting the air samples to the detector module and the
airflow sensor for monitoring the pipe system for breakage and obstructions.
The pipe system comprises essentially pipe and fittings. The standard pipe system is made
from PVC or ABS. The pipes used for equipment monitoring should be halogen-free.
Each air sampling opening in the pipe system represents a point detector in the planning.
A
Overview of the aspirating smoke detector
To guarantee reliable operation even under the most difficult conditions (clean rooms,
recycling area), there are numerous accessories available, such as air filters, water separators
and detonation safety barriers.
3.4
Functions
Air samples are taken from the area to be monitored via the aspiration unit. They are fed via a
pipe system with defined air sampling openings to the sensitive detection module.
Detector module
Depending on the response sensitivity of the detector module in use and programmed alarm
threshold, the FCS-320 series aspirating smoke detector triggers the alarm when the
corresponding light obscuration threshold is reached. With the FCS-320‑TP1 and the
FCS-320‑TP2, the alarm is displayed via the alarm LED and/or two alarm LEDs on the unit and
transmitted to a connected fire panel. The FCS-320‑TT1 and FCS-320‑TT2 versions offer
differentiated LED displays for info, pre and main alarm. Pre and main alarms are transmitted
to the fire panel (with FPA‑5000 Rel 2.1; additionally with info alarm from Rel 2.5 or above).
Various delay times can be programmed for the alarm thresholds, as well as for displaying and
transferring malfunctions. Alarm messages are saved and are reset after the cause has been
eliminated.
LOGIC · SENS
2018.04 | 2.0 | F.01U.130.926
Where highly sensitive detection is necessary (e.g. in areas where, due to built-in filter
elements, the air contains a low concentration of smoke particles)
Where high air-exchange rates prevail.
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7
2
3
Operation Guide
Aspirating Smoke Detector
A
Pipe system
FCS-320 Aspirating smoke
detector
1
Smoke aspiration pipe
2
Air intake
3
Air sampling openings
4
Detector module
including airflow
monitoring
5
Housing
6
Aspiration unit
7
Air outlet
Bosch Sicherheitssysteme GmbH
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