With no CYA in the water, make sure you keep your chlorine between 3-6 ppm at all times. (Now is when the best guess chlorine chart linked in my sig will become important to you ). However, as your CYA level rises, so must your minimum chlorine (use the chart!! ) We usually initially tell people to aim for 40-50 ppm of CYA to start with. However, I'm about 2 1/2 hours from you, so my climate is very much the same as yours, and I find that I lose too much chlorine too fast if I keep it that low. I run my pool at 80-90 ppm CYA, but it's in full sun all day.

My advice to you would be to start with about 50 ppm, test your chlorine use daily for a few days, and see what your average is. Then bump your CYA up by about 10-20 ppm and see if your chlorine use slows down. You can keep bumping up a little at a time this way until you find the point where you're losing the least amount of chlorine in a day. By only bumping up a little at at a time, you won't completely overshoot your idea level, because it's easy to lower the CYA by 10-20 ppm than it is to tell you right off the bat to go for 90 ppm.