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Commissioning
7.1 Preparations
Check the following:
• Are the surfaces of the system and its components clean and undamaged?
• Is the wiring correct according to VDE and customer specifications (cross-sections
appropriate for current load, manner of routing, cables correctly color-coded,
customer-specific wire markings)?
• Is the tubing routed according to the gas flow diagram in a functionally suitable
manner?
• Have any lines been loosened after transport?
All media connections were marked at the factory and can be easily identified by the
user.
If appropriate for the configured system, notices warning of toxic or asphyxiating gases
have been attached.
7.1.2
Leak test
The line systems were checked for leaks prior to delivery and their leakage rate complies
with the standard of the connection technology used according to EN 12266-1 (testing of
valves).
The gas paths must be tested sequentially based on the gas flow diagram.
You must disconnect the analyzers for this test because they could be destroyed if the
pressure is too high.
Check the system for leaks as follows:
1. Seal off the end of the respective gas path with a blanking plug.
2. Connect the test station to the gas inlet.
3. Open any solenoid valves, ball/plug valves, etc. so that the gas path is open from the
inlet up to the sealed outlet.
4. Increase the calibration gas pressure to maximum 0.5 bar (500 hPa; 7.25 psi).
5. Close the gas inlet with the stopcock at the test station.
6. Wait for about 10 minutes.
The pressure difference after 10 minutes must not exceed 1% of the test pressure.
If the pressure drop is greater, you must locate the leak. Leak detector spray can be very
helpful for this. In this case, also check the gaskets and glands.
The leak test can also be performed as a vacuum test with a vacuum pump.
34
Operating Instructions, 03/2020, A5E34491309-11
Set CEM CERT
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