MP 39 (401A)
Does anyone use this for a low temp box in the -10 Degree range and if so do you have a particular expansion valve suitable for low temps that you can remember? I working on a box with this setup and the expansion valve says its for that type of refrigerant but I'm having a hard time understanding the pressures when I gauge the system and getting the box below 10 degrees. I tried doing a search for this but no one really covers mp 39 in any real detail.
The only decision in life is to decide what to do with the time given to you