Freon Loss and Icing on Compressor Suction Line
I have a Trane XE-1200, 3 ton compressor with R-22. The nameplate on the unit says the charge is 8 lbs. 12 oz. Does this charge include charge for the cooling coil?
This system has had a small slow leak in it since before 2005, which has resulted in the suction line icing up three times during the period. The times between the three refills has been 2.77 years and 2.79 years.
How much R-22 can leak from this system before the suction line ices up?
An Air Conditioning repair company has been unable to find the leak each of the three times and simply added R-22. They billed me for 7 lbs., 10 lbs., and 10 lbs. for these three times, which seems excessive since I would think that the total system charge was about 10 lbs. and the system appeared to be operating properly immediately before it iced up each time.