HVAC Evacuation. Leak testing by vacuum..500 microns ≠ No Leak

Is a nitrogen test necessary? Is 500 microns considered leak-free?
The pressure test of 500 microns serves as a reliable leak check. A constant reading on the vacuum gauge between 500 and 1,000 microns for at least seven minutes indicates a tightly sealed, leak-free, and dry system.
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[@TheSkunk1996]

Good advice. Thank you sir!!

[@AirConAcademy]

Thank you! I hope I could help. Thank you for watching!

[@mohdzaidqureshi5917]

Sir please make a video on inverter AC temperature protection and what all protection is there in it!

[@AirConAcademy]

Thank you for your suggestion. I am trying to make time to make more videos. I will see what I can do. And thank you for watching!

[@mohdzaidqureshi5917]

If we turn on the vacuum machine for 1 minute, the moisture present inside the chamber of the compressor will be removed.

[@AirConAcademy]

Some of the moisture will be removed. But you really need a micron gauge to make sure that you have removed all of the moisture. It is recommended that you pull a vacuum down to 500 µm. it is difficult to say yes that will be long enough because no one really knows how much moisture has gone into the compressor. long before micron gages were invented we would always pull a vacuum for a minimum of 45 minutes. But like I said, it is best to use a micron gauge. Thank you for watching! And I hope this helps!