View Full Version : Tx problems
08-01-2006, 06:27 PM
I have a copland 10 ton running R22 Freon, the coolers running at 38 degrees it has no head master on it but has a remote condensor and all the fans are running on it. The evaporators fans are all running, the outside temp is 104 degrees with humidity level at 30% at mid day the line freezes up to the compressors motor housing and that the pressures both head and suctions are going up and down within 10 min. from 250 to 300 and suction from 30 to 50 both move at the same time is it a tx or a clogged coil problem?
[Edited by kt825 on 08-01-2006 at 07:16 PM]
08-01-2006, 06:44 PM
Not to be rude, but you need to supply more info than that.
08-05-2006, 02:21 PM
Possible non-condensibles in the circuit. Shut down unit, let the R22 stabilize for 20-30 minutes, then check the temperature of the condenser coil and compare your readings with a P/T chart. If the readings are off, replace the R22. Be sure to vacuum below 500 microns and purge the hoses prior to filling!
08-08-2006, 05:01 PM
from where does the line freeze up? It sounds like you might have a vavle problem
08-22-2006, 11:27 PM
I would check sub cooling,also check superheat,you may have to make a charge adjustment or reposition your txv bulb.
08-22-2006, 11:34 PM
The guys over in the refer section might be better suited to help you.
But be full warned, they're not as gentle as we are.
You also need to supply more info.
08-23-2006, 01:27 AM
I did it one time like you. it is the pressure control adjustment problem .You need turn on the system. wait till the evapator freezes then adjust the pressure control untill the compressor turns off. If you have any questions gave me a call at (920)563-7268
08-29-2006, 01:31 AM
The hunting sounds like an oversized TXV, or poor mounting of the sensing bulb. On a horizontal suction line out of the evap. coil, the bulb should be mounted at the 2 or 10 o'clock position.
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