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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 electrode's locking collar, and remove the electrode package.
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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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