Before a system is evacuated, all piping should be filled with nitrogen and a small amount of refrigerant, in order to be leak-checked.
This is an important step in ensuring that the system is working properly and that there are no leaks. By filling the system with nitrogen, it prevents the refrigerant from escaping and ensures that it stays within the system.
Before a system is evacuated, it is important to fill the piping with nitrogen and a small amount of refrigerant. This will help to ensure that there are no leaks in the system. Once the system has been leak-checked, it can then be evacuated and charged with the proper amount of refrigerant.
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