I was wondering if any of you could help me figure this one out.I am a York dealer and I am working on an old Carrier heat pump, some genius ripped the model nameplate off the unit and now I have to try to figure out what size the thing is. The Carlyle compressor has model number MD20913HB.Does anyone have an idea of what ton unit this might be? The only place that I know of to try to find out anything about this and the guy tells me he has no idea.