• Leak detection system is tight according to the table in the documentation
• Leak detector is mounted outside the potentially explosive area
• Conduits into and out of dome or control shafts are closed airtight
• Electrical connection cannot be switched off
6.3. Maintenance
(1) Maintenance work and functional tests may only be carried out by trained staff
.
(2) Work is carried out once a year to assure functional and operating safety.
(3) Extent of the tests is described in chapter 6.4.
(4) It must be checked whether the conditions described in chapters 4 to 6.3 are being ob-
served.
(5) Disconnect from the mains before opening the leak detector housing.
6.4. Functional test
Tests of the functional and operating safety must be carried out
• after every start-up,
• acc. to chapter 6.3
,
• after every case of troubleshooting.
6.4.1 Extent of the test
(1) If necessary, discuss the tasks to be carried out with the person responsible on-site.
(2) Heed the safety instructions regarding contact with the stored products present.
(3) Monitoring and emptying the condensate traps if necessary (6.4.2).
(4) Testing the probe if appropriate (chapter 6.4.3)
(5) Check the free passage of air in the interstitial space (chapter 6.4.4).
(6) Test the switching values with the interstitial space (chapter 6.4.5).
alternatively: test the switching values using the test device (chapter 6.4.6).
(7) Test the lift of the vacuum pump (chapter 6.4.7).
(8) Check tightness of the leak detection system (chapter 6.4.8).
(9) Set up operating state (chapter 6.4.9).
(10) A qualified person must fill out a test report confirming function and operational safety.
6.4.2 Checking and emptying the condensate traps if necessary
(1) If there are shut-off valves on the interstitial space, close these.
(2) Three-way valve 20 and 21 to position IV to ensure aeration of the connecting lines.
For Germany: qualified knowledge or under the responsibility of a qualified person.
For Europe: Authorisation from the manufacturer.
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