Friday, January 3, 2020

Oil charging of Refer System

Without pump:

Shut the outlet valve of the reciever and pump down.
Bypass the LP cut out.
Now vacuum creates in the Crankcase.
Crack open A and ensure no air going to crankcase.

With pump:
First purge the line with oil.
Tight the nipple and continue the charging 

Problems of Overcharge
Liquid may return back to compressor can lead to frosting.
High level in reciever.
HP cut out.

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