I have a question on charging a Payne 1.5 ton H.P. with a fixed metering devise with superheat. I followed the charging procedure according to manufactures specs. which are find the wet bulb temp of the air entering evaporator coil which was 72 deg. and outdoor temp which was 85 deg. According to the first chart is stated that I had a superheat temp of 26. So I went on to the second chart provided by manufacture which stated at 26 deg. superheat and the suction pressure of 73 psi the suction line temp should be 61 deg. which i achieved by removing a little freon. Does this sound right. Because I have read many times on this site that the superheat should be between 10-20. Indoor temp was 84 and I ended up with a delta t of 16 deg. What doesn,t make since to me is the superheat chart went from 0 to 40 deg superheat.