It has a max. throughput and you need to stay (way) below that!If not then the unit cant keep up chilling the air and lurkewarm humid air is the result.What du you intend to use it with?
I'we heard of folks putting some 100+ feet of coiled copper brake line into a deep freezer and getting the same result.If it's redneck and it works it's OK!
Getting service for an R12 unit is what caught my eye as a potential problem. However, I must confess to having about 7 to 9 small refrigeration compressors on hand should I ever decide what I intend to make of one of them. So far the collection stands at a handful of dehumidifiers; almost as many fridges/microfridges innards and even an under-counter icemaker. I have seen a number of projects that convert them into "quiet" shop compressors. While I don't need one for a shop compressor, having a compressor that can go to 230, 450 or even 560 PSI suggests some possibilities applicable to a PCP. For example, desiccated air at several hundred PSI is much drier than that done at lower pressures. I already have a scheme like this using my shop compressor--silica gel beads have been put in the tank and I just leave it pressurized to about 130 PSI at least overnight before using it to boost my hand pump.But the other one I keep telling myself I will get around to doing is use one to drive a booster pump like a Shoebox or brake booster scheme. Especially the 560 PSI unit. The pressure rating corresponds to what refrigerant it runs on. R22 is 450 PSI; R410A is 560 PSI. If you can find one that already has lost its refrigerant that will save you a disposal problem. They aren't fast, but the DIY appeal is strong...