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Old 07-19-2012, 04:38 PM   #1
jkv
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high everything need some thoughts


Hey guys I got a call air not working when I got there I have 40* superheat, 25* supcooling, td around 5* indoor coil and out clean as can be this is a older 22 system the guy had a compressor I put it in for him now I have 26* subcooling 40* superheat 11.9 amp. on compressor and td of 15* any thoughts what am I missing here hot summer and getting tired

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Old 07-19-2012, 06:38 PM   #2
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high everything need some thoughts


Had one like that today that ended up being non-condensables on an old system that had not ran in years. Reclaimed,vacuum pumped to 500 microns and recharged with fresh 22 and everything turned out perfect. No idea when or how air got in there but it was taking up a bunch of room in the condensing coils.

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Old 07-19-2012, 06:43 PM   #3
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high everything need some thoughts


Restriction somewhere. Or bad powerhead on the TXV if it has one.
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Old 07-20-2012, 05:47 AM   #4
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high everything need some thoughts


No txv, thought of air I tried the same thing Marty but no change at all. I was thinking restriction but have no idea were it could be I was going to check the orifice but you cant get to it.
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Old 07-20-2012, 07:46 AM   #5
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high everything need some thoughts


This a heat pump? If so, possibly troubles with the reversing valve - check temps and pressures (if possible) on both in and out pipes to determine if you have major differences.

Drier(s) clogged? I've had to replace driers within days of compressors changes, and in fact include that in my quotes now.

If not TXV, then you'll have to get to the metering device. Some of them have screens, and the screen might be clogged, or might have trash in the orifice.
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Old 07-20-2012, 04:55 PM   #6
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high everything need some thoughts


not a heat pump but I have not got a call back so mabe all is good, I should have known by now. The laddy that lives their is on oxy. so that always worrys me more, I know 2 ton system and 85* inside you will have high superheat but this one got me. and with the landlord having me put in a 25 year old compressor worried me also.
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Old 07-21-2012, 01:06 AM   #7
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high everything need some thoughts


Quote:
Originally Posted by beenthere View Post
Restriction somewhere. Or bad powerhead on the TXV if it has one.
agree
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Old 07-21-2012, 07:33 AM   #8
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high everything need some thoughts


Did I read that right? You installed a 25 year old used compressor supplied by the landlord? Lesson learned,don't do that.
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Old 07-21-2012, 07:46 AM   #9
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high everything need some thoughts


Well it was a trane lol!

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