I'm a DIYer. I have a new home which has four zones. Two are installed and running. The other two have all the interior systems installed with the outdoor condensing unit plumbed and wired to the outside of the home but no units are present. It was never installed - to save the prior owner some up front costs, I suppose.
My question is, if I purchase the proper outdoor hardware, is it just a matter of soldering the unit in place? Is all the refrigerant contained in that unit? Or do I need to completely vacuum the entire system before inserting refrigerant? This I would not attempt.
I think I know the answer but please advise what I may be able to try and what to look out for.