Aqua-Base ESW Serie Manuel De L'utilisateur page 30

5 – CLEANING OF THE MEMBRANE
When should the membrane be cleaned?

Cleaning of the membrane is necessary once a year (see chapter D: Maintenance schedule)
In normal operation, the R/O membrane can be clogged by mineral and organic deposits, which accumulate until they cause a drop in fresh
water production quality and quantity. The membrane should be cleaned each time the quantity or the quality of the produced water changes
excessively. Before proceeding with a membrane cleaning, check that the change in performance has no other cause, such as:
- Low seawater temperature,
- Filter clogged, water system badly drained, leading to lack of water at the pump,
- Inefficient operation of the HP pump: leaks, wear...
- Cell clogged.
Cleaning of the membrane can only be carried out when inside the pressure vessel. Never take a membrane out of
its pressure vessel.
How should the membrane be cleaned?

In case of long-term wintering, proceed with preservation operation.
NOTA: Membrane cleaning can be done in the factory or by your agent in a more thorough way, on a specialised bench. Contact
your agent or the factory directly.
When should the membrane be replaced?

A membrane has a lifetime of about 5 years. Then, as the plastic materials harden, the pores retighten and production will decrease. Then,
you must replace the membrane. If the membrane has accidentally taken in fuel or oil, it must be replaced. The membrane is one of the most
fragile elements of the watermaker, it is necessary to take care of them by respecting the maintenance requirements.
To replace a reverse osmosis membrane, please contact us directly or through one of our dealers, to obtain the membrane replacement
specification sheet, by giving us the serial number of the membrane.

See 3.5 – Wintering procedure « Cleaning »
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