Originally Posted by
mjohnson2981
Hello,
I came across a pie case today that is low on charge. I could not find any markings that would tell me what refrigerant is in the unit.
The compressor is a RSN4-0050-IAA with a serial number from 88. This would lead me to believe R12
TXV is a FJ-1/2-C which is tagged as R12, R134a, and R401a.
I hooked up my Neutronics Refrigerant ID and it did not ID it as R12 or R134a but instead came up with:
DET-1 = 5.7%
DET-2 = 49.0%
DET-3 = 45.3%
DET-4 = 0.0%
NON = 0.0%
I know it wouldn't recognize R401a but it should have picked out R12 or R134a. I don't know if anyone else has one to compare readings.
The PT chart for the three is all pretty close, so I don't know if I could do a standing pressure test to differentiate.
I have never ran across R401a before.
Anyone have any thoughts?