Specifications
Preparation 7
Application
Water quality - Verify that raw water hardness and iron are within limits. Note the hardness for setting the salt dosage and
recharge frequency.
Iron - Iron is a common water problem. The chemical/physical nature of iron found in natural water supplies is exhibited in four
general types.
1. Dissolved Iron - Also called ferrous or “clear water” iron. Up to 5 ppm of this type of iron can be removed from the water
by the same ion exchange principle that removes the hardness elements, calcium and magnesium. Dissolved iron is
soluble in water and is detected by taking a sample of the water to be treated in a clear glass. The water in the glass is
initially clear, but on standing exposed to the air, it may gradually turn cloudy or colored as it oxidizes.
2. Particulate Iron -
Also called ferric or colloidal iron. This type of iron is an undissolved particle of iron. A softener will
remove larger particles, but they may not be washed out in regeneration effectively and will eventually foul the ion
exchange resin. A ltering treatment will be required to remove this type of iron.
3. Organic Bound Iron -
This type of iron is strongly attached to an organic compound in the water. The ion exchange
process alone cannot break this attachment and the softener will not remove this type of iron.
4. Bacterial Iron - This type of iron is protected inside a bacteria cell. Like the organic bound iron, it is not removed by a
water softener.
When using a softener to remove both hardness and up to 5 ppm of dissolved iron it is important that it regenerates more
frequently than ordinarily would be calculated for hardness removal alone. Although many factors and formulas have been used
to determine this frequency, it is recommended that the softener be regenerated when it has reached 50 - 75% of the calculated
hardness alone capacity. This will minimize the potential for bed fouling (iron removal claims have not been veried by the Water
Quality Association or Underwriters Laboratories).
If you are operating a water softener on clear water iron, regular resin bed cleaning is needed to keep the bed from coating
with iron. Even when operating a softener on water with less than the maximum of dissolved iron, regular cleanings should
be performed. Clean every six months or more often if iron appears in your conditioned water supply. Use resin bed cleaning
compounds carefully following the directions on the container.
Pressure - If pressure exceeds 125 psi (860 kPa), install a pressure reducing valve (see materials checklist). On private water
systems, make sure the minimum pressure (the pressure at which the pump starts) is greater than 20 psi (140 kPa). Adjust the
pressure switch if necessary.
Temperature - Do not install the unit where it might freeze, or next to a water heater or furnace or in direct sunlight. Outdoor
installation is not recommended, and voids the warranty. Use the Culligan Outdoor Medallist Series Softener for outdoor
installations. The Culligan Outdoor Medallist Series Softener has been certied by Underwriter’s Laboratories for outdoor
installation. If installing in an outside location, you must take the steps necessary to assure the softener installation plumbing,
wiring, etc. areas well protected from the elements (sunlight, rain, wind, heat, cold), contamination, vandalism, etc. as when
installed indoors.
Caution! The use of a pressure reducing valve may limit the ow of water in the household.
Caution! Do not use where the water is microbiologically unsafe or with water of unknown quality adequate disinfection
before or after the unit.