Blowing Out And Checking The Sensor Tube For Leaks - Bosch ADW 511A Installationsanleitung

44 en | Installation
7.3

Blowing out and checking the sensor tube for leaks

Once the sensor tube has been installed and before the Serto end screw cap is fitted to the
tube end, blow out the entire pipe system with nitrogen (approx. 30 secs. at 1 bar) to remove
all traces of moisture from the system.
To do this, attach a bottle of nitrogen to the end of the sensor tube that will later be con-
nected to the detector box.
Fit the Serto end screw cap immediately after blowing out the tube; then check the pipe sys-
tem for leaks (60 secs. at 1 bar).
This step is also performed using the nitrogen bottle, which is still connected.
NOTICE!
i
Under no circumstances must the detector box be connected to the system during blow-out
and leakage test.
Setup for blowing out:
Blowing out
5.
6.
7.
8.
9.
10. Blow out the pipe system for 30 seconds. Close the stop valve (5).
11. Document the procedure as evidence.
NOTICE!
i
The end screw cap must be fitted immediately after blowing out the pipe system to prevent
any moisture, dirt etc. from entering the pipe.
The nitrogen bottle can remain connected for the leakage test.
BDL -F.01U.004.036 | A2 | 2006.11
1 Nitrogen bottle
2 Main valve
3 Primary manometer
4 Secondary manometer
5 Stop valve
6 Adjustment valve
7 Sensor tube
8 Plastic hose
9 Detector box
Make sure the end screw cap is not connected.
Fully open the main valve (2) on the nitrogen bottle.
Check whether the primary manometer (3) shows pressure.
Open the adjusting valve (6) until the secondary manometer (4) shows a pressure of
1 bar (100 kPa).
Connect the nitrogen bottle to the pipe system and open the stop valve (5).
Installation Guide
Linear heat detector ADW 511A Transafe
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Bosch Sicherheitssysteme GmbH
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