mwb
03-05-2014, 10:12 PM
Hello
My problem is I am getting old and losing it and I don’t work on this stuff a lot. I am working on a carrier 30hxa and head is high, with an evap. condenser. My D P is 190 psi (R-134A), S C T 108*, outside air 88*, L W T 44* and building load is low 70* R A. A 190 psi equals 127*. 127*- 88* is 39*, and the rule of thumb is 20*, but 108* - 88* equals 20*. The S C T is normal but the D P is high, then it is not from scale or tower sprayers. So if I am thinking right it is ether over charge or non condensables. I will isolate the evap. Condenser and test temps.
Your thoughts?
thank you
My problem is I am getting old and losing it and I don’t work on this stuff a lot. I am working on a carrier 30hxa and head is high, with an evap. condenser. My D P is 190 psi (R-134A), S C T 108*, outside air 88*, L W T 44* and building load is low 70* R A. A 190 psi equals 127*. 127*- 88* is 39*, and the rule of thumb is 20*, but 108* - 88* equals 20*. The S C T is normal but the D P is high, then it is not from scale or tower sprayers. So if I am thinking right it is ether over charge or non condensables. I will isolate the evap. Condenser and test temps.
Your thoughts?
thank you