Pipe System Components; Overview - Bosch FAS-420-TT Series Operation Manual

Aspiration smoke detector LSN improved
3.6

Pipe system components

3.6.1

Overview

A
3
Pipe system components
During planning/design, a distinction is drawn between area monitoring and equipment
monitoring. For both applications, PVC pipes and halogen-free pipes can be used but the
restrictions of EN 54.20 must be observed. The pipes used for equipment monitoring should
be halogen-free.
The figure shows essential accessory components that can be selected for the application
concerned.
The pipe system must be constructed using pipes with an external diameter of 25 mm and the
associated fittings.
If the maximum permissible pipe lengths are used, then for the pipe returns, pipes with an
exterior diameter of 40 mm and the appropriate fittings must be used.
Blowing-out system
In areas that are susceptible to dust particles or icing, it may be necessary to blow out the
aspiration pipe system and its air sampling openings. The figure below shows a manual
blowing-out system with a three-way tap.
Bosch Sicherheitssysteme GmbH
5
A
4
A
2
1
6
7
9
8
10
B
11
12
13
A
14
Operation guide
Technical specifications | en
A Pipe system connection
B Smoke aspiration pipe
1 Connection for test
adapter
2 T-fitting
3 Air filter
4 Water separator
5 Detonation safety barrier
(not permitted for
EN 54‑20 or ISO
7240-20)
6 90° pipe bend
7 Aspiration hose for
ceiling lead-through
8 Ceiling Lead-through
9 Fitting
10 Double threaded joint
11 90° pipe elbow
12 45° pipe elbow
13 Aspiration reduction
14 End cap
2020.04 | 6.1 | F.01U.029.275
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