Bosch FAS-420, Operation Manuals

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96 en | Installation of the Pipe System Aspirating Smoke Detector
2018.04 | 2.0 | F.01U.130.926 Operation Guide Bosch Sicherheitssysteme GmbH
1
2 3
30°
Positioning the air sampling opening depending on air
speed
1 Aspiration pipe with air
sampling openings
2 Exhaust speed < 0.5 m/s
3 Exhaust speed > 0.5 m/s
6.4.2 Detection in the Bypass
Notice!
For detection in airflows ≥ 2 m/s, additionally feed the exhaust from the FCS-320 back into
the airflow area. Cut the end of the air-return pipe at an angle of 45°.
1 2
3
4
b
1/2 b
Positioning the air-return pipe – example with an air-
conditioning duct (bypass)
1 Air-conditioning duct
2 Duct adapter
3 Aspiration
4 Air-return Pipe
b Width of air-conditioning duct
For details on connecting the air-return pipe, please see Air-return Pipe, page 98 .
For FCS‑320 planning in these applications, see Planning for Forced Airflow, page 69 .
See also
– Planning for Forced Airflow, page 69
– Air-return Pipe, page 98
– Planning for Forced Airflow, page 69