. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1 General Warnings . . . . . . . . . . . . . . . . . . . . . . . . . .1 Principles Of Softening-Ion Exchange . . . . . . . . . .2 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5 Quick Reference Specifications . . . . . . . . . . . . . . .5 Control Valve Function and Cycles of Operation . . . . . .6 Regeneration Steps And Purpose . . . . . . . . . . . . . .6 Exchange Capacity Data . . . . . . . . . . . . . .