Pro/Forums - View Single Post - Evaluate my plan for the phase change setup

Brians256 · 02-19-2003, 03:59 PM

Flush the compressor by running dry air through it. Preferably dry nitrogen. But, some people run dry propane through it if they have a bunch of it laying around. Really, though, I prefer using a vacuum pump. Please try to never put any water at all into your compressor.

I do not know if you can use the standard mineral oil from walmart. It might be high enough purity. Anyone know that one?

I don't think a plumbing fixture will work with the high pressure in an HVAC system. If you are low on funds, a cap tube will get you started and then you can try a thermal expansion valve later on if you want to have optimum performance over a range of heat loads (i.e. being able to dump more refrigerant into the evaporator when the system is fully loaded versus throttling back when the CPU is idle so that you don't get liquid slugging). I think that 6' is a good guess, but it depends upon how well you insulate your system, and upon your evaporator design, etc... Many people have said that 6' is a good starting point.

I believe that the three pin power connector is standard AC wiring: hot, neutral and ground. Perhaps someone else knows for certain.

02-19-2003, 03:59 PM	#12
Brians256 Pro/Staff Join Date: Oct 2001 Location: Klamath Falls, OR Posts: 1,439	Flush the compressor by running dry air through it. Preferably dry nitrogen. But, some people run dry propane through it if they have a bunch of it laying around. Really, though, I prefer using a vacuum pump. Please try to never put any water at all into your compressor. I do not know if you can use the standard mineral oil from walmart. It might be high enough purity. Anyone know that one? I don't think a plumbing fixture will work with the high pressure in an HVAC system. If you are low on funds, a cap tube will get you started and then you can try a thermal expansion valve later on if you want to have optimum performance over a range of heat loads (i.e. being able to dump more refrigerant into the evaporator when the system is fully loaded versus throttling back when the CPU is idle so that you don't get liquid slugging). I think that 6' is a good guess, but it depends upon how well you insulate your system, and upon your evaporator design, etc... Many people have said that 6' is a good starting point. I believe that the three pin power connector is standard AC wiring: hot, neutral and ground. Perhaps someone else knows for certain.