Bosch FAS-420-TT2 - Planning the Aspiration Smoke Detector System

Aspiration smoke detector LSN improved Planning | en 31
Bosch Sicherheitssysteme GmbH Operation guide 2020.04 | 6.1 | F.01U.029.275
Detonation safety barrier (FAS‑ASD‑DSB)
Type PROTEGO Type EG IIA
Explosion group II A
Flame filter 3-way
Gap width 0.7mm
Pipe connection thread G 3/4 inch, incl. transition thread on one side for connecting
to the aspiration pipe system
Length x diameter 112mm x 80mm
Certification EC type-tested
Three way tap (FAS‑ASD‑3WT)
Features With 3 transition threads for connection to a 25mmpipe
system
Operating pressure Max. 10bar
Housing material PVC plastic
Seal Teflon (PTFE)
Length 131mm
Application temperature
range
0°C to +50°C
Ceiling lead-through (FAS‑ASD‑CLT) with aspiration hose (FAS‑ASD‑AHC)
Maximum false ceiling
thickness
35mm
Max. length of aspiration
hose per ceiling lead-
through
1m
Ceiling lead-through fitting
material
ABS
Aspiration hose material PE
Color of aspiration hose
and ceiling lead-through
White
Application temperature
range
-40°C to +80°C
4 Planning
Basic information on the relevant topics can be found in
– Regulations, page 32
– Principles of pipe planning, page 33
– Airflow monitoring, page 36