[David]

I did the entire install.

There was already 220 power for the window unit so that made the wiring a little easier. The wiring included 220 through a disconnect switch outside to the compressor. Then 220 from the compressor to an inside wall disconnect switch up to the wall mounted evaporator/fan.

The copper lines have flair fittings at both ends so they're easy for a DIY'r.

There's only one service port on the Mitsubishi system. You hook up your pressure gauge's low pressure line to the service port and a vacuum pump to the gauges. Pull vacuum on the system, close the gauge valve, check that vacuum is holding, remove the gauge line, and open both liquid and gas stop valves on the compressor to release the stored R410A refrigerant.

The evacuation and charge was really easy except that I originally couldn't get full vacuum or hold it because I loosened one of the flair fittings behind the wall unit when man-handling it into place. So with a friend's help we pulled it back off the wall and found the loose fitting. The lesson of this was to use a big enough wall penetration hole for the two copper lines and drain line so you're not fighting to get everything through the hole while holding the evaporator over your head. I used 2.5" conduit and I should have used 3".