Model NO:AMB 744 CT 60HZ

Hi i am in need of a and operating manual for rainsoft amb Model no:744
just move in to the house, and noticed the water was hared check the sysem out the clock works but nothing happen, manuall turn each dial still get nothing. When adding salt to tank do you add water to tank or the unit puts the water in.
All the dial work electrically and keep the right time of day but that all, would like to get a manual for this unit.Thank you
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