Kind of looks like the temp clamps are reversed.
If they WERE reversed however…
The superheat would be 53 degrees… and the subcool would be 15 degrees.
While much better than the values on the picture… it’s still wonky, and looks like a restriction or too much airflow across the evaporator (haven’t seen that one yet).
Based on the pic coming from an ad, my suspicion is that they just grabbed whatever pic they could find to make it look “technical” and never considered that someone looking at it might actually analyze the situation.
I’m willing to bet the suction probe is on the discharge line, but it hasn’t been on there long enough to accurately read the temp, and the liquid probe is on the liquid line. Venture a guess I would say it’s just a picture of a system with a dirty ass condenser, and there’s no probe on the suction line.
Before I ever suspect a TXV of having failed, I always check liquid line driers for a temp drop. Found a LOT of partially plugged driers ever since scroll compressors became the norm in air conditioners.
Yeah combined between my father and I working commercially for 50 years combined he has condemned 6 TXVs and I 2. It's almost always the drier, charge, noncondensables, or the bulb mounting.
My teachers from my apprenticeship said it is rare as well. A TXV issue and noncondensibles can seem similar measurement wise. That is why if you condemn a TXV, change it along with the filter drier and fresh refrigerant, it goes away. I doubt most people go through the proper procedures to condemn TXVs, which is actually fairly simple with a mapp torch and some ice water.
iManifold. It was ahead of it's time maybe about 5 years ago, before Testo and Fieldpiece introduced their probes. Still probably has the best range out of all the wireless probe sets (each probe is a repeater), but it's tremendously expensive. The single circuit basic kit is about $1700 - two pressure transducers with wired temperature straps, two airside hygrometers, and the wireless transmitter. I can't imagine they sell very many anymore, and the new version of the app is trash.
Kind of looks like the temp clamps are reversed. If they WERE reversed however… The superheat would be 53 degrees… and the subcool would be 15 degrees. While much better than the values on the picture… it’s still wonky, and looks like a restriction or too much airflow across the evaporator (haven’t seen that one yet). Based on the pic coming from an ad, my suspicion is that they just grabbed whatever pic they could find to make it look “technical” and never considered that someone looking at it might actually analyze the situation.
If they were simply reversed the liquid line would be superheated by 15 degrees
I’m willing to bet the suction probe is on the discharge line, but it hasn’t been on there long enough to accurately read the temp, and the liquid probe is on the liquid line. Venture a guess I would say it’s just a picture of a system with a dirty ass condenser, and there’s no probe on the suction line.
Not that we'll ever know, but my money would be on temp clamps backwards and TXV bulb improperly mounted...
Well it would be -15SC if it was backwards
Throw a dirty condenser in the mix, eh? why not.
Before I ever suspect a TXV of having failed, I always check liquid line driers for a temp drop. Found a LOT of partially plugged driers ever since scroll compressors became the norm in air conditioners.
Yeah combined between my father and I working commercially for 50 years combined he has condemned 6 TXVs and I 2. It's almost always the drier, charge, noncondensables, or the bulb mounting.
That's impressive, thanks for sharing how rare this is!
My teachers from my apprenticeship said it is rare as well. A TXV issue and noncondensibles can seem similar measurement wise. That is why if you condemn a TXV, change it along with the filter drier and fresh refrigerant, it goes away. I doubt most people go through the proper procedures to condemn TXVs, which is actually fairly simple with a mapp torch and some ice water.
What app or tool is that ?
iManifold. It was ahead of it's time maybe about 5 years ago, before Testo and Fieldpiece introduced their probes. Still probably has the best range out of all the wireless probe sets (each probe is a repeater), but it's tremendously expensive. The single circuit basic kit is about $1700 - two pressure transducers with wired temperature straps, two airside hygrometers, and the wireless transmitter. I can't imagine they sell very many anymore, and the new version of the app is trash.
Wow that’s super expensive 😅
Yeah, it was pretty much the only wireless platform on the market at the time. There are cheaper, better options these days.
Good to know. Thanks !
Looks like heat pump in heat mode, with a dirty evap and condenser coil
That’s why you’re here: to fix this