Determining size of older systems when there’s no nameplate

We've got a really old three phase R22 system here that's freezing up that's probably going to need to be replaced. And as you can see, there's no nameplate that we can read. I'm going to try to tell you, I'm going to show you how to look at these compressors. This is an old Copeland compressor. You see these numbers right here? It's 0500. That actually means that's a 5 horse power compressor. power motor in that compressor but that also tells you that's a five ton compressor so not many of them have nameplates like that anymore but that's one way to tell what size a really old system is