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MEMPHIS91 · 12-30-15, 06:13 PM

HAHA WOW, sorry jeff after looking at it again I see what you mean. Thanks for having the faith in me to know I didn't do something that crazy. lol Here is a better picture for you.

On to more test data, So this is a 40% R290, 60% R1270 mix. ONLY because I was out of R290. SO I need to look at the PT chart for R1270 as well to get closer guess as to the saturation temp. http://www.gas2010.com/pdfs/care45_pt.pdf

First Subcooling,

So 210psi equals 113.8F for R290 and 94F for R1270 so a good guess would be 105F saturation temp. My line temp was 97.7 was that's 7.3F subcooling. I really should have just stayed with R290 because it going to be very hard to know exactly what is going on with mixed pt charts. Plus I was using my cheap temp meter, I will use my nice one next time as well.

Next Superheat,

So 75psi equals 48F for R290 and 25F for R1270 so a good guess 38F saturation temp. My line was 62.2 so 24.2F Superheat.

So this clearly shows I'm still undercharged. I'll do more tuning tonight.
I know I am no where close yet, I just want to record my progress so others can learn as well.
More soon

12-30-15, 06:13 PM	#139
MEMPHIS91 Journeyman EcoRenovator Join Date: Apr 2015 Location: Oxford, MS USA Posts: 496 Thanks: 69 Thanked 87 Times in 61 Posts	HAHA WOW, sorry jeff after looking at it again I see what you mean. Thanks for having the faith in me to know I didn't do something that crazy. lol Here is a better picture for you. On to more test data, So this is a 40% R290, 60% R1270 mix. ONLY because I was out of R290. SO I need to look at the PT chart for R1270 as well to get closer guess as to the saturation temp. http://www.gas2010.com/pdfs/care45_pt.pdf First Subcooling, So 210psi equals 113.8F for R290 and 94F for R1270 so a good guess would be 105F saturation temp. My line temp was 97.7 was that's 7.3F subcooling. I really should have just stayed with R290 because it going to be very hard to know exactly what is going on with mixed pt charts. Plus I was using my cheap temp meter, I will use my nice one next time as well. Next Superheat, So 75psi equals 48F for R290 and 25F for R1270 so a good guess 38F saturation temp. My line was 62.2 so 24.2F Superheat. So this clearly shows I'm still undercharged. I'll do more tuning tonight. I know I am no where close yet, I just want to record my progress so others can learn as well. More soon Attached Images __________________ שְׁמַע יִשְׂרָאֵל ה' אֱלֹהֵינוּ ה' אֶחָד Last edited by MEMPHIS91; 12-30-15 at 07:24 PM..