Water Quality
Verify that raw water iron, pH level and alkalinity are within recommended limits.
Iron—A Common Water Problem
The chemical/physical nature of iron found in natural water supplies is exhibited in four general types:
1. Ferrous Iron
—Also referred to as “dissolved iron” or “clear water” iron. The Iron-OX5 is rated
to remove up to 5 ppm of this type of iron. If a glass is filled with water containing ferrous iron
the water will initially be clear. Upon standing and being exposed to air the water will gradually
turn cloudy and colored as the ferrous iron oxidizes to ferric iron.
2. Particulate Iron
—Also called ferric iron. This type of iron is an undissolved particle of iron.
The Iron-OX5 filter will effectively remove these particles but it is not the intended design
of the system. If there is a significant amount of ferric iron additional filtration treatment
may be required prior to the Iron-OX5.
3. Organic Bound Iron
—This type of iron is strongly attached to an organic compound in the water.
The oxidation / filtration process used in the Iron-OX5 will not remove this type of iron.
4. Bacterial Iron and Colloidal Iron
—These types of iron, like organic bound iron, will not be removed
by the Iron-OX5 filter.
Principles of Operation - Iron-OX5 Aeration System
The Culligan Iron-OX5 system utilizes the principle of oxidation to convert ferrous iron to ferric iron,
resulting in removal of the iron as a filterable particle. The process is accomplished by water entering
|the filter tank being immediately exposed to an “airhead” at the top of the filter tank to begin the
oxidation process. The filter media acts a catalyst to help complete the oxidation reaction and retain
the precipitated iron. Periodic backwashing purges the accumulated iron particles from the filter tank
and re-classifies the media bed.
After the backwash cycle the Iron-OX5 control valve replenishes the airhead in the filter tank
during the “Air Draw” cycle. During this cycle Air is educted into the filter tank in sufficient volume
for the required airhead. During the “Rinse”cycle the air charge is compressed and stored within
the filter tank and the filter media is rinsed prior to the system returning to the service cycle.
CAUTION! Do not use where the water is microbiologically unsafe or with water
of unknown quality adequate disinfection before or after the unit.
Pressure
- Although the system is designed and tested to operate at a maximum pressure of 60
psi, it is not expected that the system should be exposed to such pressure for extended operation.
Culligan recommends following the IAPMO Uniform Plumbing code section 806.2 by installing a
Pressure Regulating Valve if the water pressure is greater than 60 psi. Operating on pressures
above the UPC for extended periods of time can increase the service frequency and failure of
replacement parts. On a private water system, make sure the minimum pressure (when the pump
starts) is greater than 20 psi (140 kPa).
CAUTION! The use of a pressure reducing valve may
limit the flow of water in the household.
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 and UL Certifications.
Application
7
01035155 A 09/19
