OVERPRESSURE LEAK DETECTOR
DLR-2
18/01/2002 Ihr Partner für Leckanzeigetechnik
Sicherungsgerätebau GmbH, Siegen
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(18) If the "alarm ON" pressure value does not correspond to the value determined under item
(5), the pressure switch can be readjusted, otherwise continue with item (19):
Tightening the screw leads to higher pressure values, loosening to lower pressure values:
DLR-2/11: 1 rotation ~ 550 mbar
DLR-2/22: 1 rotation ~ 750 mbar
(19) Insert the safety pin in the pressure switch.
(20) Open shut-off cock 2.2.
(21) Wait for "alarm OFF" switching value.
(22) Close shut-off cock 2.2.
(23) Carry out functional test according to chapter 7.4.
7. Operating instructions
7.1. General
instructions
(1) If the leak detector system has been assembled tightly and correctly then it can be as-
sumed that the leak detector is working without any problems.
(2) Even slight leaks cause the alarm to be triggered.
(3) In case the alarm is triggered, establish the cause quickly and eliminate the problem.
(4) The operator must visually check at regular intervals that the "in operation" lamp is working.
(5) The leak detector must be disconnected from the mains for any repair work.
(6) Current interruptions are indicated by the "in operation" lamp going out. The alarm is trig-
gered via the potential-free relay contacts (if these are used for forwarding the alarm).
7.2. Maintenance
(1) Maintenance work and functional tests may only be carried out by qualified persons
(2) The equipment must be checked once every year for functional and operational safety.
(3) Check the test valve at the end of the pipework away from the leak detector for air-
tightness and cleanliness.
(4) Pressure build-up in the interstitial space to nominal pressure.
(5) The extent of the annual tests is described in chapter 7.4.
(6) It must also be ensured that the conditions described in chapter 5 are being observed.
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For Germany: person having qualified knowledge in the area of assembly and service of leak detection
systems or under the responsibility of a qualified person, according to current regulations.
