SGB VL 230, Документация

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VACUUM LEAK DETECTOR VL ..
18/07/2019 - 7 -
10 seconds after this value has been displayed the signal lamp returns to normal operation.
The leak detector must have carried out at least 1 automatic post-feed interval in normal op-
eration (i.e. without external assembly pump) to achieve a valid statement.
•
Zero-point adjustment
Three-way valve 21 in position II.
Press the "mute" button and keep it pressed until the "alarm" signal lamp blinks quickly after
approx. 5 seconds, then release the button. Press the button again immediately and then re-
lease it again. Adjustment is confirmed by 3 optical and audible signals.
Before repeating zero-point adjustment the "pump OFF" switching value must be reached.
VL .. /E ONLY
•
Start-up (opening the solenoid valves)
Press the "start-up" button and keep it pressed for approx. 5 seconds until both red signal
lamps light up. The solenoid valves are opened, the pump starts to run. If this button is kept
pressed longer than 10 seconds, the alarm signal is generated. Shortly after the button is re-
leased the alarm signal triggered is deleted again.
For information about activating or deactivating the solenoid valves, refer also to chapter
4.5.1
4. Mounting instructions
4.1. General notes
(1) Heed manufacturers' approval for the tanks and the interstitial space.
(2) Installation and start-up must be carried out by a qualified company
5
.
(3) Heed relevant regulations concerning electrical installation
6
.
(4) Heed and observe accident prevention regulations.
(5) Pneumatic connections, connection lines and fittings must be able to withstand the pres-
sure (static pressure plus superimposed pressure) which could occur in the case of a leak,
for the whole temperature range possible.
(6) Before anyone enters a dome or control shaft, the oxygen content must be checked and
the shaft flushed out if necessary.
4.2. Mounting the leak detector
(1) Wall mounting, within a building
(2) Wall mounting in the open, using a suitable protective box.
If the detector is to be mounted in a protective box, at least one of the following points must
be observed:
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Signal lamps for operation must be visible from the outside (protective box with trans-
parent lid or signal lamps mounted on the outside)
-
Use of potential-free contacts to extend alarm - if these contacts are not used, additional
external signal
5
For Germany: Specialist firms according to the Federal Water Act, which have verified their qualification
for the installation of leak detection systems. For Europe: Authorisation from the manufacturer.
6
For Germany: e.g. VDE regulations, regulations issued by utilities companies.