Quote Originally Posted by BaldLoonie View Post
Isolate the lineset from the building. You probably did help it manipulating that bracket. Changing lineset wouldn't change things unless they were run differently. Your oldie didn't have a scroll which is why you didn't used to hear it.
OK, so in addition to isolating the lineset, I stuffed some fiberglass insulation between the lineset and my ceiling. This lowered the noise level to a managable level that I can live with. I surfed a few websites on scroll compressors and ,oddly enough, they seem to indicate that they're suppose to be quieter than others. Anyway, thanks to everyone for all the help. I've learned a lot here the past couple days. Now I'm off to the "indoor air quality" forum to get educated there.