To help speed things along, I use my hand propane torch to add a bit of heat to the oil sump on the crankcase , receiver, accumulator, and uninsulated bare copper lines. I read before in the OEM literature to triple hvac and on the first nitrogen break, to energize the compressor for about 5 seconds to attempt to drive out some of the refrigerant in the crankcase. I remember in my HVAC/R college days, seeing a #10 can, 1/2 full of refrigeration oil, constantly bubbling for about an hour, as it was sitting on a work bench, because it was entrained with R12.
Would it be worth a system to heat the nitrogen even to recycle charged with nitrogen and heat the tubes in the system? It's a shame new fridges seem to be lacking the QC of old fridges,
I'm sorry to disagree with you but you are not in touch with reality or practicality. First of all you don't start your vaccuum untill you do a pressures test. This means that you do not have to do a fast vacuum to find out if you have a leak in your system. Secondly schrader valves are much more of a restriction than 1/4" x 6' hoses. Thirdly if you can't pull a 300 micron vacuum on a 5 ton AC system while you are doing the rest of the install you should change your pump oil or you pump. If you can prove that 3/8 or 1/2 inch hoses would cut my time in half I might listen to some of your recommendations. I do not remove cores, and I do use 1/4" hoses and I don't hang around for an hour after the other installation items are done. If I were working on a 10 ton system or bigger I leave the pump overnight. It doesn't wear out my pump because it runs in oil to keep it lubricated. The motor has ball bearings which don't wear out since I over greased them many years ago. I know some grocery store installers that insist on using copper tube instead of hoses but i'm pretty sure that it is still 1/4" . If I were dong those jobs, I would probably use 3/8" just because it is handy and a bit faster but a 3/8 hose is not worth buying. I have 3 spare ones hanging around and have no need to use them. Great vacuum with 1//4"
Made it to the end! Was worth the nearly 50 minutes!
To help speed things along, I use my hand propane torch to add a bit of heat to the oil sump on the crankcase , receiver, accumulator, and uninsulated bare copper lines. I read before in the OEM literature to triple hvac and on the first nitrogen break, to energize the compressor for about 5 seconds to attempt to drive out some of the refrigerant in the crankcase.
I remember in my HVAC/R college days, seeing a #10 can, 1/2 full of refrigeration oil, constantly bubbling for about an hour, as it was sitting on a work bench, because it was entrained with R12.
Fantastic subject!
simply fantastic podcast!
Would it be worth a system to heat the nitrogen even to recycle charged with nitrogen and heat the tubes in the system?
It's a shame new fridges seem to be lacking the QC of old fridges,
This Was Great!!!
Good Info!
Great subject impressive knowledge.Can you say paradigm shift.
amazing
You mean to say that the earth isn't flat!? Blasphemy!!
Fantastic subject from an intelligent guest. Only complaint I have is his 20 year old refrigerator example, but great episode nonetheless
I'm sorry to disagree with you but you are not in touch with reality or practicality. First of all you don't start your vaccuum untill you do a pressures test. This means that you do not have to do a fast vacuum to find out if you have a leak in your system. Secondly schrader valves are much more of a restriction than 1/4" x 6' hoses. Thirdly if you can't pull a 300 micron vacuum on a 5 ton AC system while you are doing the rest of the install you should change your pump oil or you pump. If you can prove that 3/8 or 1/2 inch hoses would cut my time in half I might listen to some of your recommendations. I do not remove cores, and I do use 1/4" hoses and I don't hang around for an hour after the other installation items are done. If I were working on a 10 ton system or bigger I leave the pump overnight. It doesn't wear out my pump because it runs in oil to keep it lubricated. The motor has ball bearings which don't wear out since I over greased them many years ago. I know some grocery store installers that insist on using copper tube instead of hoses but i'm pretty sure that it is still 1/4" . If I were dong those jobs, I would probably use 3/8" just because it is handy and a bit faster but a 3/8 hose is not worth buying. I have 3 spare ones hanging around and have no need to use them. Great vacuum with 1//4"
It's not magic?? LOL
Evacuation, sucks! ...lmbo!