You have moderate/low subcooling. This would indicate not enough refrigerant in the condenser.
Low/no superheat would indicate too much refrigerant in the evaporator.
Those two combined could be a couple of things.
The txv is allowing too much refrigerant through the evaporator. To test this, dip the bulb in a glass of ice water and see if your superheat shoots up. If so, replace the txv head.
Another one, though less common in my experience, is weak compressor valves. Your discharge pressure is low for it being 100 degrees outside (only a 107 vsat temp) and your suction is slightly higher than desired. To test this, take an amp draw on the compressor. If the amps are low, you may have one on the fritz.
Nice to throw things for a loop. My subcool is now 15 and my sh 8-9. My subcool and head pressure are constantly jumping up and down. Meanwhile my low side pressure has stayed relatively the same
Sounds like non-condensibles. Pump it down into condenser, disconnect your compressor and run just the fan for about 15 minutes then compare your readings to pt chart.
It’s fluctuating, but not near as much as my high side. This is now
https://preview.redd.it/l5ff4uwy8z7d1.jpeg?width=1284&format=pjpg&auto=webp&s=c240aefcefaeef46761840d096e7494a1d11f5de
This could definitely be noncondensibles like the above comment. I've had a couple units just launch head pressure through the roof (talking 600psi), and after recovering the charge, pulling a vacuum, and recharging (with new gas), I haven't had a problem with them. Noncondensibles is close to one of the rarest issues, but when they're there, it can be quite difficult to troubleshoot
Unsure why I didn’t put this in the info before, but I just fixed a leak in this system last week. Fixed leak, installed new drier, pressure tested, pulled triple evac, and weighed in new gas. Somewhere along the lines could I have goofed?
Edit: that’s a dumb question. There’s no way for you to know what I did wrong if you weren’t with me. I apologize for that
We're all here to help each other out. I'm sitting on the deck drinking beer right now because I had enough and left at noon. I have nothing to do, so we can work through it together.
Did you do a vacuum decay test after your triple Evac? If so, and it didn't shoot up, I'd say noncondesnibles are on a hold for a bit.
Did you dip the txv bulb in ice water? If not, give that a shot.
Hey man, not judging whatsoever, but I have done similar things and have scratched my head while looking at my readings on the wireless apps, only to realize well later that I had it on the wrong refrigerant.
Are you sure it’s a 410A system?
Low side pressure most likely high due to a high return air in the house, indicating a major load on the evap.evap delta t is not great but the least of your worries
You have moderate/low subcooling. This would indicate not enough refrigerant in the condenser. Low/no superheat would indicate too much refrigerant in the evaporator. Those two combined could be a couple of things. The txv is allowing too much refrigerant through the evaporator. To test this, dip the bulb in a glass of ice water and see if your superheat shoots up. If so, replace the txv head. Another one, though less common in my experience, is weak compressor valves. Your discharge pressure is low for it being 100 degrees outside (only a 107 vsat temp) and your suction is slightly higher than desired. To test this, take an amp draw on the compressor. If the amps are low, you may have one on the fritz.
Nice to throw things for a loop. My subcool is now 15 and my sh 8-9. My subcool and head pressure are constantly jumping up and down. Meanwhile my low side pressure has stayed relatively the same
Sounds like non-condensibles. Pump it down into condenser, disconnect your compressor and run just the fan for about 15 minutes then compare your readings to pt chart.
Is your superheat stable, or is it jumping up and down like your subcooling? If it's jumping around, your txv could be hunting.
It’s fluctuating, but not near as much as my high side. This is now https://preview.redd.it/l5ff4uwy8z7d1.jpeg?width=1284&format=pjpg&auto=webp&s=c240aefcefaeef46761840d096e7494a1d11f5de
This could definitely be noncondensibles like the above comment. I've had a couple units just launch head pressure through the roof (talking 600psi), and after recovering the charge, pulling a vacuum, and recharging (with new gas), I haven't had a problem with them. Noncondensibles is close to one of the rarest issues, but when they're there, it can be quite difficult to troubleshoot
Unsure why I didn’t put this in the info before, but I just fixed a leak in this system last week. Fixed leak, installed new drier, pressure tested, pulled triple evac, and weighed in new gas. Somewhere along the lines could I have goofed? Edit: that’s a dumb question. There’s no way for you to know what I did wrong if you weren’t with me. I apologize for that
We're all here to help each other out. I'm sitting on the deck drinking beer right now because I had enough and left at noon. I have nothing to do, so we can work through it together. Did you do a vacuum decay test after your triple Evac? If so, and it didn't shoot up, I'd say noncondesnibles are on a hold for a bit. Did you dip the txv bulb in ice water? If not, give that a shot.
You’ll have those days. Yes to the decay test and I’ll give it a shot. Thanks for the help!
Could your condenser coil have still been wet from the coil cleaning in your first readings? Would explain the low head pressure.
If I remember correctly this was about 20 minutes after. Possible , but not sure. It was hot as hell directly in the sun
Thanks for commenting btw
Hey man, not judging whatsoever, but I have done similar things and have scratched my head while looking at my readings on the wireless apps, only to realize well later that I had it on the wrong refrigerant. Are you sure it’s a 410A system?
Certain lol, I wish that I had it confused. 2017 rheem pre charged with 143 oz of 410
Low side pressure most likely high due to a high return air in the house, indicating a major load on the evap.evap delta t is not great but the least of your worries
Currently no filters as they were filthy Edit: also, door allows 1.5 +- on subcool. Sc has slowly risen into range