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6.
MAINTENANCE:____________________________________________________________
6.1.
Maintenance of the electrolysis cell
The electrolysis cell must be kept in suitable conditions to ensure a long lifetime. This salt
chlorination unit has an automatic electrode cleaning system that helps to prevent scale build-up
on the electrode surface. If the salt chlorination system is operated in accordance with these
instructions, and in particular if the pool water balance is kept within the recommended
parameters, it should not be necessary to manually clean the electrodes. However, if the pool
water and the salt chlorination system are not maintained in line with these instructions then it may
be necessary to manually clean the electrodes following the procedure outlined below:
1.
Cut off the 230 Vac unit's supply.
2.
Unscrew the closing nut located at the end where the electrodes are located, and
remove the electrode package.
3.
Use diluted hydrochloric acid (a part of commercial acid in 10 parts of water),
submerging the electrode package in the prepared solution for no more than 10
minutes.
4.
NEVER SCRAPE OR SWEEP THE CELL OR THE ELECTRODES.
The electrodes of a salt chlorination system comprise of a titanium sheet coated with a layer of
noble metal oxides. The electrolysis processes that take place on their surface produce a
progressive wearing down – the electrodes do have a finite life. In order to optimise electrode
lifetime, please consider the following aspects:
1.
Although all salt electrolysis units are SELF-CLEANING, a prolonged operation of the
system at pH values over 7.6 in waters of high hardness can produce scale formation on
the surface of the electrodes. Scaling on the electrodes surface will progressively
deteriorate the coating, causing a decrease of lifetime.
2.
Manually cleaning/washing the electrodes (as described above) will shorten their life.
3.
Prolonged operation of the system at salinities lower than 3 g/l (3000 ppm) will cause a
premature deterioration of the electrodes.
4.
Frequent use of copper based algaecides will promote the formation of copper deposits
on the electrodes, progressively damaging the coating. Remember that chlorine is the
best algaecide.
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