I just did mine, no low point drains.
Following the users guide that Dan supplied, I blew mine out first including the ice maker and cold water supply. I also too the old water filter in the refrigerator out and cut the end off of it and then glued it back on. So when I blow air through the cold water line, I'm not blowing the water out of the filter.
Also I take the fittings off at the frig and at the valve inside and blow just thru them too.
I have a 3 way valve that is under the just outside the frame where the tubing comes from the supply and goes to the frig, so I open this valve and it allows the water to go out it also.
I also stuff a couple of paper towels into the ice maker to make sure all the water is gone from there.