Bosch FAS-420-TT Series - System Overview

Aspiration smoke detectors LSN improved System overview | en 19
Bosch Sicherheitssysteme GmbH Quick installation guide 2020.04 | 5 | F.01U.029.274
1 System overview
For the connections of the FAS-420-TP device, refer to graphic 01, page 4 . For the connections
of the FAS-420-TT device, refer to graphic 02, page 4 .
Position in
figure
Function Explanation
FAS-420 series 1 Cable bushing for connection of fire panel
and additional power supply (input/
output)
1 x M20, for cable diameters of
8-12mm
2 Pipe system 1 connection For Ø 25mm pipe system
3 Pipe system 2 connection (only for devices
with a two pipe system)
For Ø 25mm pipe system
4 Connection for air-return pipe
5 Cable bushing for connection of fire panel
and additional power supply (input/
output)
2 x M25 for cable diameters of
9-14mm (expandable to 14-
18mm)
For FAS-420-TP1 and FAS-420-TP2 LEDs, refer to graphic 01, page 4 .
FAS-420-TP Designation LED Color Explanation
I Operation Green Operation
II Alarm
1
Red Alarm
III Fault Yellow Fault
– in the pipe system
– of a detector module
– caused by fan failure
1
Two alarm LEDs on the FAS-420-TP2
For FAS-420-TT1 and FAS-420-TT2 LEDs, refer to graphic 02, page 4 .
FAS-420‑TT Designation LED
1
Color Explanation
I Operation Green Operation
II Fault Yellow Fault
– in the pipe system
– of a detector module
– caused by fan failure
III Main alarm Red 100% smoke level
Internal alarm
1
Red 66% smoke level
Info alarm
1
Red 33% smoke level
IV Smoke level display 1 to 10
1
10 yellow
LEDs
Current smoke level
1
All displays doubled on the FAS-420-TT2