It has been a while since I installed a unit because I now work for a university. That being said, all I have been exposed to are the 12 seers and mostly 10 seer units. I know the pressures fall as the seer raises, but I really don't know how much. I installed a 13 seer unit this morning and these are the numbers. Let me know if this is normal or not.
When I finally finished adding r22, I at first came up with 225 head, 74 suction and 55 degree line temp. It was 85 outside and around 78 inside. I cooled the house down a little while I was packing up and then I came back to these numbers- 86 degrees outside, 74 inside, Head 220, suction 72, line temp 46. I was running a little low on the superheat chart and took some back out until my line temp rose to 47.5 and my suction fell 1 point to 71 as mentioned. The head pressure looked to be around 218 or so. Now, inside I was getting 60 degree supply air and around 75-76 degree air going in up at the ceiling. This by the way is an attic installation.
Do these numbers sound right to you? Thanks guys