61AAN WaterMax® Iron Filter Sizing Formula
The WaterMax® Iron Filter may be programmed to regenerate every one to twelve days. Select the frequency based on the amount of iron in the water and the number of people in the household. For optimum performance, program the water softener to regenerate first, followed by the Iron Filter.
Example: Softener 1:00 am; Iron Filter 3:00 am. See the 61AAN WaterMax® Iron Filter Sizing Formula.
Regeneration Cycle Frequency Worksheet
This table will help you determine how often the iron filter will need to regenerate.
|
| Water |
| Example | ||
Total Iron | ____ ppm x 1 = |
| ____ ppm | 3.5 ppm x 1 = |
| 3.5 ppm |
+ Manganese* | ____ ppm x 3 = |
| ____ ppm | 0.2 ppm x 3 = |
| 0.6 ppm |
+ Sulfur | ____ ppm x 5 = |
| ____ ppm | 1.0 ppm x 5 = |
| 5.0 ppm |
= Total compensated ppm |
|
| ____ ppm |
|
| 9.1 ppm |
x Gallons per day for one |
|
| 75 gal |
|
| 75 gal |
person |
|
|
|
|
|
|
= ppm per person per day | = |
| ____ ppm |
|
| 682.5 ppm |
x Number of people in household |
|
| ____ people |
|
| 4 people |
= Daily ppm capacity |
|
| ____ ppm |
|
| 2730 ppm |
Iron filter capacity | = |
| 10,000 ppm |
|
| 10,000 ppm |
÷ Daily ppm requirements | = |
| ____ ppm |
|
| 2730 ppm |
= Frequency of regeneration |
|
| ____ days |
|
| 3.6 days |
Set regeneration frequency | @ |
| ____ days |
|
| 3 days |
*If manganese is unknown, multiply the iron and sulfur total by 1.15 to adjust total compensated ppm.
Determine Monthly Usage
This table will help you determine how much regenerant the iron filter will use each month.
| Water | Example |
Total days per month | ____ days | 30 days |
÷ Frequency of regeneration | ____ days | 3 days |
= Regenerations per month | ____ regenerations | 10 regenerations |
x 4 oz per regeneration = oz KMnO4 per month | ____ oz | 4 oz x 10 regenerations |
|
| = 40 oz |
÷ 16 = lb per month | ____ lb | 40 oz ÷ 16 oz/lb |
|
| = 2.5 lb |
Notes:
WaterMax 60 Series Owner’s Manual | 11/10/2008 | 24 |