OK here it goes
this one really had me going still
1995 condenser unit 3 ton 11.5 S.E.E.R.
plugged in my gauges looked like over charge did recovery on the refrigerant r-22.
Then pulled it in a vacuum then shot it with nitrogen figured clean out any contaminants then pulled it back in a vacuum.
Now put the charge back weighed it in 115 oz this is what the factory charge was on the label when it was made.
72 degrees outside
high side 250 psig
low side 61 psig
highside line temp. 115
lowside line temp 55
OK so now I now the charge is perfect so I clean the condenser coil real good.
now after it dries I plug in gauges again
now it is still 72 degrees out
now I get
high side 220psig yes 220
low side 60 psig
high side line temp 95
low side line temp 55
= superheat 21
= subcooling 13
thing is now its freezing up outside by the compressor the suction line.
now its not undercharged
air filters clean
This homeowner has a small apartment in the basement now the blower is down there and they added vents.
Also there is a 12 inch by 12 inch return down there the blower is just 18 inches behind the wall of the return also 3 feet above the return is a 8 inch supply vent.
Now would that air not go down and back in without even cooling that hallway, the homeowner did this maybe this is part of the problem its screwy or am I missing something.
spent hours there don't like not fixing them not a good feeling every now and then I get stuck on one, this was that one.
[Edited by TheDuke on 07-07-2005 at 10:21 PM]