Originally Posted by
mknox
i realize that if there is a chart in/on the odu its best to use it; but i see alot of units with only subcooling charts on them. if its got a txv, no good. our company will work on anything so i dont have charts from every manufacturer. i ve found a good deal of difference between manufacturers, unit size, and especially freon type. i guess what im really looking for is how everyone feels about the formula i posted originally{ wb x 3 - oat divided by 2 = target superheat }. is it universal?, does it work for all refrigerants? all replies welcome.