Owner's manual

8
To determine the frequency of regeneration, use this procedure:
Setting the Frequency of Automatic Regeneration (SXT Models)
Please enter the ppm of compensated iron per gallon of water to be removed. See Step #4 of “User
Programming.” The SXT valve will automatically calculate the number of gallons of water to be treated by the
iron filter between regenerations.
Iron Content in the Feed Water:
ppm of capacity between regenerations (see Specifications - Page 1)
÷ ppm of iron in the water sample*
= number of gallons supplied between regenerations
- reserve capacity (number of people x 75 gallons)
Example - Using 5600 SXTM-948IF + 1 Feeder
6000 ppm between regenerations
÷ 8 ppm of compensated iron [To be entered by the user]
= 750 gallons between regenerations [See step #5 of “User Programming”]
– 375 gallons reserve capacity (5 people x 75 gallons)
= 375 GALLONS - BETWEEN REGENERATIONS [Calculated by valve]
* 1 ppm of manganese = 2 ppm of iron; 1 ppm of hydrogen sulfide = 3 ppm of iron
Days:
Total amount of iron to be removed between regenerations -
÷ ppm of iron to be removed per day
= NUMBER OF DAYS BETWEEN REGENERATIONS
Example:
5 people in the household
x 75 gallons of filtered water per person
= 375 gallons of filtered per day
x 8 ppm of compensated iron
= 3,000 PPM OF IRON TO BE REMOVED PER DAY
Using 5600 SXTM-948IF + 1 Feeder
6,000 ppm capacity
÷ 3,000 ppm to be removed per day
= 2** DAYS BETWEEN REGENERATIONS
**Maximum number of days between regenerartions should be 12.