Bosch FAS-420-TT Series - Aspiration Smoke Detector Series and Accessories Overview

14 en | Technical specifications Aspiration smoke detector LSN improved
2020.04 | 6.1 | F.01U.029.275 Operation guide Bosch Sicherheitssysteme GmbH
To set the FAS-420 to the airflow typical for the pipe network, an airflow initialization (flow-
init) procedure is carried out. This must be done for each unit once at the start after
installation, each time the pipe system is replanned/redesigned and after changing the fan
voltage. This enables the unit to determine and save the airflow typical for the pipe network.
Pipe system
A pipe system with an overall length of up to 300m can be connected to FAS-420 series
aspirating smoke detectors over a maximum of 32 aspiration points. Two pipe systems can be
connected to both the FAS‑420‑TP2 and FAS‑420‑TT2 variants. The entire pipe system then
has a total length of 2 x 280m and a maximum number of 2 x 32 aspiration points.
3.5 FAS‑420 Aspiration smoke detector series and accessories
3.5.1 Overview
2
A
3
C
E
G
F
1
B
D
FAS / FCS
Overview of FAS-420 series aspirating
smoke detectors and accessories
1 Pipe system(s)
2 Connections to fire panel/power supply
3 Air-return pipe
A Vibration absorber (sold separately)
B MT-1 unit mounting
C Detector module
D DIAG Diagnostic Software with connection
cable
E Cable bushings (1xM20, 2xM25)
F Test pipe
G Test adapter
FAS-420 Aspiration smoke detector series has the following components:
– Plastic housing
– Plastic connection pieces
– Integrated air-return pipe
– Connection for pipe with 25mm external diameter
– Aspiration unit with optimized air supply
– Motherboard with interface for diagnostics system, LSN connections, connection for
shield wire, as well as DIP switch for address setting
– Supplementary package with cable bushings (1xM20, 2xM25)
– FAS-420-TP1 /FAS-420-TP2: optical LEDs for alarm, malfunction and operation
– FAS-420-TT1 /FAS-420-TT2: smoke level LED(s), LEDs for info, internal and main alarm,
malfunction and operation
– 1 detector module (for FAS-420-TP1 and FAS-420-TT1) and/or 2 detector modules (for
FAS-420-TP2 and FAS-420-TT2).