AC Service Ports

duz185The 3331 album

Good morning. So after owning 3331 for 15 years, I finally decided to go ahead and charge the AC.

So I have a new York compressor that runs R12 that was installed 20 years ago and sealed but never used. I recently connected hoses and bought a dryer. I'm ready to charge, add oil, and know to slowly charge and watch pressures carefully. I know to charge on the suction side, but my only question is what ports do I use? The ones on the compressor don't appear to have shrader valves. What happens when I disconnect the gauge hoses? Will all the refrigerant leak back out? Am I missing something?

Any help would be greatly appreciated!!

William

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8/23/215:40 AM

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