20/05/2020
VACUUM LEAK DETECTOR
VLR ..
and
VLR .. MV
- 33 -
7.
Functional Check and Maintenance
7.1 General
(1) If the leak detection system has been properly installed and is
free of leaks, trouble-free operation can be assumed.
(2) Frequent switching on or continuous running of the pump indi-
cates leaks, which should be corrected within a reasonable peri-
od of time.
(3) In the event of an alarm, determine the cause and correct it
quickly.
(4) The operator must check the function of the operating lights at
regular intervals.
(5) The leak detector must be disconnected from the power when
performing any repairs.
(6) A loss of power is indicated by the “Operation” indicator light go-
ing off. Alarm signals are triggered via the potential-free relay
contacts if contacts 11 and 12 were used.
After the power loss, the leak detector automatically goes into
operation again and the potential-free contacts no longer gener-
ate an alarm (unless the power loss has caused the pressure to
drop below the alarm pressure).
(7) CAUTION: For single-walled tanks equipped with a flexible leak
protection lining, the interstitial space can never be without pres-
sure (risk of collapse of the leak protection lining)!
7.2 Maintenance
o
Maintenance work and functional checks must be performed by
trained personnel only
6
.
o
Once a year to ensure functional and operational safety.
o
Test scope according to Section 7.3.
o
Compliance with the conditions in Sections 5 and 6 must also be
tested.
o
As part of the annual functional check, check the motor of the
pump for running noises (damaged bearings).
o
If the pump or its exhaust pipe is exchanged or detached, then a
tightness test should be carried out for the installed pump with a
pressure of 10 bar after the exchange in order to ensure the im-
permeability of the exhaust in the housing.
6
For Germany: Technical service according to water legislation with expertise in leak detection systems
For Europe: Authorization by the manufacturer
Functional Check and Maintenance