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I was working on a water cooled trane unit
My supper heat was 17 degrees
My subcooling was 15 degrres
I had 22 dregrees over my water coil
24 dregrees over my air flow coil
and 12 amp on a 17fla compresssor at the compressos
155 psig head pressure 55psig Suction
My water tempature was 52 degrees at my inlet and 74 dgrees at my outlet
My air tempature was 73 degrees at my return and 49 degrees at my discharge
This is a computer room maintaining a 72 degree room tempature. Upon arriving my air flow coil is frozen and I have to thaw it out. Came back the next day to change the filter and have been watching the unit for two days and it is working okay. Cycles on a t-87 honeywell on/off fan runs continueusly. The filter was a little drity but not plugged. It was a high efficency filter on the unit. This is a pelum return and the only thing I could come up with was low condnsing tempature and maybe not to put in a high efficency filter on this type of unit. Any thoughts on why the coil froze up?