Superheat for a Marvair 48K wall pack system with a piston?
So what should my target superheat be with a R22 or MO99 system? Marvair compac 1 48K with a piston? I talked to marvair they are telling me 10-12 for superheat and 12-18 for subcooling. I was under the impression w piston was good for 20 degree superheat.