I question your 10-15 ppm of iron, who tested the water? A Sanitizer makes a small amount of chlorine during regeneration which sanitizes the resin bed and in your case it isn't resin, it's Water Right's Zeolite. That softener is not what I'd suggest for your water and if I were you and thinking of buying it, first I'd talk to Water Right to see if they agree with me. No softener alone is going to treat your water. So you'll need an oxidizer/disinfectant system like my inline pellet chlorinator, mixing tank and a backwashed carbon filter or, if you do not have any IRB or other bacteria, an iron filter before a softener.
Is there any odor in this water; hot, cold or both?
What flow rate are you talking about, to run the well 'dry'? What type, sub or jet and what size (hp and gpm) pump do you have?