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Thanks for so much advice. It is certainly helpful. Appears to me in reading all the posts/advice that the current best approach at this point is verify there are no restrictions (which requires...

I'm interested in books along a couple fronts but would summarize as some theory (psychrometrics and superheat/subcooling), residential system design including ductwork, and practical field...

Anyone have a good HVAC book to recommend? Saw this on Amazon

Troubleshooting and Servicing Modern Air Conditioning and Refrigeration Systems by John Tomczyk

Appears comprehensive but can...

Recovered some R-22 today and now have the following readings:

Liquid Line
250psig >> ~117.5 deg F
80 deg F (reading taken near service valve)
---------
37.5 deg F SC (should not exceed 15 deg...

Assuming there is a partial restriction and #84 orifice is too small, what would be the best way to determine what the size of the orifice should be? I spoke to RUUD customer support yesterday and...

Just updated....did not see that it was germane to my query for advice but I'm happy to provide that info. ;-)

Added R-22 today and took the following readings:

Liquid Line
275psig >> ~123 deg F
80 deg F (reading taken near service valve)
---------
43 deg F SC...

Last year I worte about this same issue...Copeland Scrollin a RUUD 4-ton. I'd say the sound is like a muffled jack hammer. Was just at in-laws home and they had an 4-ton American Standard condensor...

Interesting comments as postings in the For Your Interest Fourm that speak to system efficiency discuss SH and SC but do not directly speak to CFM and Static Pressure.

I could see where that may...

No frost evident. Liquid Line just as it enters evaporator is cold to the touch but no frost. I would not expect a restriction and suspect undercharge but was hopeful Superheat and Subcooling info...

Is there any periodic time that a Filter Dryer should be changed (i.e. every five years...)?

Also if a piston system does not have a sight glass installed should one be installed as an additional...

Evaporator has a sticker which reads "Unit equipped with piston #84." I'm not clear how to determine undersized piston when this came factory installed.

Could additional R-22 be added in...

[QUOTE]Originally posted by NormChris
[B]

Can you list the books you'd recommend?

Following readings were taken today on a RUUD 4-ton R-22 system:

Liquid Line
200psig >> ~101 deg F
80 deg F (reading taken near service valve)
78 deg F (reading taken about 6" from entry to...

Can any system have a TXV installed?

[Edited by pehanlon on 06-16-2005 at 08:39 AM]