PRESSURE LEAK DETECTOR DLR-P ..
- 35 -
7.3.5 Tightness test following commissioning or correction of malfunctions
9
(1) The system tightness requirement is defined in section 6.1.
Determine the test time for each interstitial space (and/or the en-
tire monitored system) connected (calculate or use test reports
prepared by SGB GmbH).
(2) Attach measuring gauge to connection on three-way valve 21
and turn valve 180°.
(3) Read off and record starting pressure and time. Wait for test time
to elapse and determine pressure drop.
(4) The test is considered passed if the pressure does not drop by
more than 1 mbar in the test time.
The test time and allowed pressure drop can be extended or in-
creased proportionally.
(5) Once the test is complete, return valves to their original positions
and remove the measuring gauge.
7.3.6 Tightness test as part of the annual functional check
(1) Perform a tightness inquiry (see section 4.6.4).
(2) Evaluate the displayed value (visible on the display for 10 sec-
onds) according to section 4.6.4. This appendix serves informa-
tional purposes only and is not part of the permit.
7.3.7 Creating the operating condition
(1) Seal the housing of the leak detector and the test valve(s) at the
end of the interstitial space pointing away from the leak detector.
(2) Check that the three-way valves are in the correct position.
(3) If shut-off cocks have been installed in the connection lines, they
must be sealed in an opened position (if connected to an intersti-
tial space).
(4) Exchange dry filter or restore original unused condition.
9
Prerequisite: The operating pressure has been built up in the interstitial space and pressure equalization has occurred.
Functional Check and Maintenance
21
20
21
20
21
20