Completely charged. The linesets are evacuated and the compressor and head unit are precharged. If you use more than the 25’ lineset they come with, then you might have to add freon. While I do have the tools and freon around to add some if I needed as I often do AC work on my ag equipment, I didn’t have to use any. They recommend adding a certain amount if you have to use additional lineset though.

The fittings all have a dual o-ring sealing system and you can hear them pressurize when you tighten them up. Once you have it all together, you open the valves on the compressor to open the loop.

You basically check for studs, tape the pattern for the head unit to the wall where you want it, drill the lineset hole and screw the mount on. Push the lineset bundle through the wall and clip the head unit to the mount. Bend the lineset carefully so you don’t kink the copper but that seems harder to fuck up than you would think. They bend fairly nice.

If you aren’t familiar with electrical, you might want to have that done for you, but I’ve done my own electrical work for years so I wasn’t too worried about that. But you definitely don’t need to be an HVAC tech to put these in, it’s dead simple.