It's been ten days since I received the new control unit, installed it and got it up and running. The pool is looking good, water is crystal clear and everything appears to be fine.

To answer a previous question asked on this thread regarding a power surge, yes. It does appear that it was a power surge which took out at least the control unit and possible the tri-sensor. Although, everything is connected correctly, properly grounded and there were no blown fuses but I have seen lightning strikes do some very strange things such as pin holes in boots and oil cans. Wondering if I can file any of this expense against my home owner's policy?

I do have some questions as I want to be sure I am using my new system correctly to extend the life of it as much as possible. My current readings and water test results from 6/21/14 are below. Any recommendations to my questions below would be welcome.

20'x40', 3' to 8' in ground Grecian shaped pool, 28,000 gal, 4 returns, main drain and skimmer, sand filter (new this year - replaced DE filter)
New Cell = SC-60
New Control Unit
Software Version 4.4
Power Level = 1 (Factory setting)
Cell reverse 4 hours (Factory setting)
20 Volts, 5.0 Amps
Purifier on at 75%
Salt 3500 (pool store tested at 3500)

FAC=4.0
TAC=4.0
Actual water temp is at 83 degrees (verified with thermometer and MM temp probe so I adjusted the unit down 3 degrees to match that)
Calcium Hardness = 200
Cyanuric Acid = 60 (recommended range is 60-80 in the manual)
Total Alkalinity = 120
pH = 7.8
Copper = 0
Iron = 0
Phosphates = 0

Should I adjust the Purifier % down manually or increase the power level and see if the unit makes the adjustment? Will increasing the power level cause the cell to wear quicker, I assume having the unit run at anything over 50% will decrease the life of the cell?

I am running the unit 16 hours per day, 6:30 am to 10:30 pm. Is this too much/too little? How do I know other than the FAC and TAC level is good? Should I change the time of day the unit is running, i.e. start it earlier in the day and shut it off earlier in the evening or vice versa?