PRESSURE LEAK DETECTOR DLR-P ..
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6. Commissioning
(1) Only perform commissioning once the steps in section 5 "Mount-
ing" have been fulfilled.
(2) If a leak detector is commissioned on a pipe (fitting) that is al-
ready in operation, special protective measures must be taken
(e.g. testing that the leak detector and/or the interstitial space is
free of gas). Additional measures may be necessary depending
on the local conditions and must be assessed by qualified per-
sonnel.
6.1
Tightness Test
Prior to commissioning, ensure the leak-tightness of the interstitial
space.
In the case of larger interstitial spaces, the pressure build-up should
be achieved with the aid of an external pump (use dry filter!) or a ni-
trogen cylinder (use suitable pressure reducer!).
The test is generally considered passed if within a test period (in
minutes) of the interstitial space divided by 10 the pressure does not
drop by more than one mbar.
Example: Interstitial space volume = 800 liters
Thus: 800/10 = 80
Thus: Test 80 minutes for max. 1 mbar pressure drop.
6.2
Commissioning the Leak Detector
(1) Tightness of the interstitial space prior to commissioning is as-
sumed.
(2) Connect voltage supply.
(3) Ascertain lighting of "Operation" and "Alarm" signal lamps and
sounding of the audible alarm. If necessary, turn off audible
alarm signal.
The pump starts immediately and builds up pressure on the mon-
itored system (if the interstitial space has not already been pres-
surized)
(4) Attach measuring gauge to connection on the three-way valve 21
in order to turn valve 180°.
(5) The pressure build-up can be monitored via the attached meas-
uring gauge.
(6) If the pressure build-up occurs too slowly, an installation pump
with dry filter (or nitrogen cylinder with suitable pressure reducer)
can be attached to the connection on the three-way valve 20.
Turn valve 180° and switch on the installation pump.
Note: If no pressure build-up is achieved with the attached instal-
lation pump (or gas cylinder), localize and eliminate the leak (if
necessary, check delivery of the installation pump or pressure
reducer for correct setting).
(7) Check all connections for leaks with a foaming agent.
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20
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20
Commissioning