Water Trap In The Pipe System - Siemens FDA241 Technical Manual

3.3.1
Building Technologies
Fire Safety

Water trap in the pipe system

In the case of highly variable ambient conditions where there is a risk of
condensation water forming in the pipe system, a water trap must be used. The
water trap collects the condensation water. The condensation water must be
drained via a drain hole in the water trap.
The condensation water that has been collected must not enter the airflow and
must be drained in good time.
Installation site requirements
It must be easy to read the level of water in the water trap.

It must be possible to access the water trap when full for the purpose of

emptying it.
The water trap must be installed at a horizontal point within the pipe system

that is as low as possible. It must not be possible for water to accumulate at
any other point.
Example of how to arrange a water trap
→ → Airflow
1
Aspirating smoke detector with front
indicator that is rotated by 180°
2
T-fitting for connecting the water trap at a
low horizontal point within the pipe system
3
Distance between manifold and surface of
the water > 300 mm
See also
 Adapting the front indicator to the installation position [➙ 58]
Structure and function
Pipe system
4 Valve for draining condensation water
5 Outlet opening
6 Condensation water
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2015-09-29