Rena Ware AQUA NANO HD CTU-300 Uso Y Mantenimiento página 16

4. Close the housing by turning the top clockwise until the arrows marked on the
housing are almost aligned, reinstall and charge.
NOTE: Back-flushing and rinsing will improve flow but will not restore the Pre-Filter
Cartridge to "like new" condition. The improvement will be less each time you back-
flush and rinse, until it is necessary to replace the Pre-Filter Cartridge to restore the
flow rate to an acceptable level.
MAINTAINING THE AQUA√HD™ MAIN FILTER
IMPORTANT: NEVER BACK-FLUSH THE AQUA√HD™ CARTRIDGE.
Back-flushing the Aqua√HD™ cartridge will damage its internal structure, causing
the filter to become ineffective. Back-flushing can also contaminate the downstream
media of the Aqua√HD™ so that it will no longer filter properly.
Replacing the Aqua√HD™ Media Insert
NOTE: The Media Inserts in the Pre-Filter and the Aqua√HD™ are not necessarily
replaced at the same time. The LED indicator lights refer only to the Media Insert in the
Aqua√HD™ cartridge. Replace it when the flow meter's red warning light flashes.
For optimum performance we recommend replacing the Aqua√HD™ Media Insert at
least every 5 years even if the red light has not yet come on.
We suggest wearing protective gloves when handling the cartridges.
1. Disconnect the Aqua√HD™ cartridge by removing the Inlet Assembly and Pre-
Filter cartridge. Turn the Aqua√HD™ cartridge counterclockwise until it releases.
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