SGB VLR 230, Documentation, Page: 13 / 45

VACUUM LEAK DETECTOR VLR ..
2020-06-29 10
5. Start-up
(1) Heed and observe specifications in chapter 4.
(2) Carry out pneumatic connection.
(3) Set up electrical connection, do not apply voltage supply yet.
(4) Close the housing cover.
(5) Apply voltage supply.
(6) Establish lighting up of operating and alarm lamp as well as the audible alarm signal. Press
the "mute" button, the signal lamp "alarm" will blink.
(7) Only VLR ../E with solenoid valve: carry out the start-up sequence (see chapter 3.5.2).
(8) Three-way valve 21 in position "III", connect measuring gauge. (cf. P-060 000)
(9) Apply vacuum to the system. To do this, the installation pump can be connected to the muff
on three-way valve 20, position IV. Switch on the installation pump. The interstitial space
will be evacuated. Monitor the vacuum build-up on the measuring gauge.
NOTE: If no pressure is built up with the installation pump connected, the leak must be lo-
cated and eliminated (if necessary, check the feed capacity of the pump and/or the position
of the three-way valve).
(10) Once the leak detector has reached operating vacuum (pump in the leak detector switches
off), the three-way valve must be set to position I, the installation pump switched off and
removed.
(11) Three-way valve 21 in position "I", remove the measuring gauge.
(12) Carry out the functional test according to section 6.4.
6. Operating instructions
6.1. General instructions
(1) If the leak detection system is installed tightly and correctly then it can be assumed that the
leak detector is working in the range of control.
(2) Frequent switching on, or continuous running of the pump indicates leaks which must be
eliminated within a reasonable period of time.
(3) In the case of an alarm there is always either a major leak or a fault. The cause must be
established quickly and the problem eliminated.
(4) The leak detector must be disconnected from the mains for any repair work.
(5) Current interruptions are indicated by the "operation" signal lamp going out. The alarm sig-
nal is triggered via the dry relay contacts (if used to extend the alarm).
Following the current interruption, the green signal lamp lights up again, the alarm signal is
switched off via the potential-free contacts (unless the pressure has fallen below the alarm
pressure during power failure). Carry out the start-up sequence for leak detectors with con-
nected solenoid valve(s).
6.2. Intended use
•
Double-walled tanks and pipes according to chapter 2, under the listed conditions
•
Grounding according to valid regulations