I work on mostly centrifugal chillers and large RTUs at work but I've installed about a dozen 410a units, package, split and mini splits and I've had good luck. I charge everything by subcooling and superheat and the basics still apply to them just like any older units. 410a has such a narrow glide,
I haven't had any problems with the saturation temps. I took out a 2001 3.5T 12seer and put in a 2013 2.5T 15.5 seer on my own house and it's great. BTUs are BTUs and the later designs are SOOO much more efficient in the coils and motors. Craig
