Purging With Nitrogen ???

[philipswanson]

Is it a good idea to purge my A/C system with nitrogen before charging to remove moisture? The lines were flushed and left open a month ago. RV is garaged here in SoCa. New compressor and components were professionally flushed before installation.

[Miggy]

The ac shops here in my place always purge the system with nitrogen before vacuuming the system to charge. The reason, i dont know. But i know that vacuuming the system is what removes the moisture.

[Dougflas]

Excellent idea to flush with dry N2. This makes for a better vacuum process.

[philipswanson]

I think the reason for nitrogen purge is simple. To eliminate moisture from the system which is destructive.