Discussion Starter · #1 ·
I am wondering how important it is to be spot-on the manufacturing charts. For example, under typical conditions (for me), I should have 13 degrees superheat entering the low side service valve (90 degrees outside dry bulb and 66 degrees inside wet bulb). How much can I vary from 13 degrees before I should add/remove R22? IOW, when does system efficiency drop-off become noticeable? If my charge is low so that I am running 16 degrees superheat, will I see a difference in my monthly electric bill? Thanks.