How is the tightness test of the cooling circuit of a Hei-VAP performed?

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To check the tightness of the cooling circuit, please proceed as follows:

The test must be carried out with a dry system to exclude that the drops on the cooling coil are distillate. If the system is completely dry (no residues of water or solvents), evacuate the system and run the chiller at the same time.

Then observe the leak rate or increase in pressure and check whether coolant enters the evaporation chamber.

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