In most cases, the self-cleaning of the cell by polarity reversal prevents scale deposits. However, in the case of particularly hard water, manual cleaning of the cell may be necessary from time to time. Proceed as follows:
Switch off the unit and the filtration; close the isolation valves of the cell. Unscrew the electrical connections of the cell.
Unscrew the union nuts of the cell. Remove the cell and check the electrodes for scale. To descale the cell, wear gloves, goggles, a protective apron, a basin that can contain the cell horizontally, attention connections out of water.
Fill the basin with an acid ph corrector or a solution of diluted hydrochloric acid to the extent of 1 volume of acid for 4 volumes of water, Caution, always add acid to water and never the other way around.
Leave the cell to soak until the limescale disappears completely (from 3 to 24 hours depending on the scaling). After total disappearance of the limestone, rinse and reassemble the cell.