Pentair RO-2500 Instructions D'utilisation Et D'installation page 16

5 - REPLACING THE 3RD STAGE REVERSE
OSMOSIS MEMBRANE
About the Reverse Osmosis Membrane
When used under operating conditions specified on page 3 of the manual, your reverse osmosis membrane
should last at least one year. You should replace the membrane after 18 to 24 months. Replace it sooner if you
notice a return of unpleasant tastes or odours or a noticeable decline in water production. The precise life span
of your system's membrane will depend on the quality of the water entering the system and the frequency with
which you use it. Frequent system use prevents the filtered salts and minerals from building up on the membrane
as scale. The more water the system is required to produce, the longer the membrane will last. You may wish to
find a variety of uses for your system in order to prolong the life of the membrane.
During extended periods of non-use (such as during a vacation), remove the membrane from the membrane
housing and place it in a sealed plastic bag. Store membrane in refrigerator for future use.
DO NOT FREEZE.
NOTE: If system stands for more than 2 to 3 days without being used, the storage tank should be emptied.
Replacing the Membrane and Sanitizing the System and Filters
NOTE:
• It is recommended that you sanitize the system each time you change the membrane. It is not necessary
to sanitize the system when changing only the pre-filters or post-filter.
• When installing a new membrane, it is recommended that you replace the pre-filter and post-filter
cartridges as well.
Removing the Membrane and Filters
1. Turn off the cold water supply. Allow five minutes for system to depressurize. Place a tray under the
system to catch any water that spills during removal of the filter housings.
2. Open drinking water faucet to drain tank. When tank is drained, close faucet.
3. Hold the membrane housing with one hand and remove the cap with the other hand.
CAUTION: Do not disconnect tubing from membrane cap.
4. To remove the RO membrane, grasp membrane tube with pliers and pull. Discard old membrane. Screw
cap back onto membrane housing. DO NOT install new membrane.
5. Unscrew filter housings from caps and discard used cartridges.
6. Remove black rubber O-rings from grooves in housings. Wipe grooves and O-rings clean, set O-rings
aside.
Sanitizing the System
7. Rinse out bottom of housings and fill each 1/3 with water. Add 2 tablespoons of household bleach to each
housing and scrub cap, bottom of housings, and membrane housing with non-abrasive sponge or cloth.
Rinse thoroughly.
8. Lubricate O-rings with a coating of clean silicone grease. With two fingers, press each O-ring securely
into groove below the threads of the appropriate housing.
CAUTION: The rubber O-ring provides the water-tight seal between the cap and the bottom of the housing.
It is important that the O-ring be properly seated in the groove below the threads of the housing
or a water leak could occur.
9. Screw bottom of housing onto caps WITHOUT inserting prefilters and hand-tighten. Do not over-tighten.
10. Open the cold water supply and let the system run for 2 to 3 minutes to carry the bleach solution
throughout the system.
11. Close the cold water supply and turn on the drinking water faucet. Let the faucet run for about 30
seconds before turning off.
12. Let the entire system stand for 30 minutes to sanitize.
13. After 30 minutes, turn on the drinking water faucet to allow the bleach water to run out (about 3 to 5
minutes).
14. Unscrew bottom of housings. Discard bleach water and rinse.
Replacing the Membrane and Filter Cartridges
To replace the filters, see Chapter "Replacing the Pre-Filters and Post-Filter".
To replace the membrane, see Step 10: "Installing the Membrane" and Step 12: "System Start-up".
NOTE: After installing new membrane and cartridges, allow system to run for 3 hours to fill tank. Check for
leaks every hour. As pressure builds in tank, leaks may occur that did not exist directly after
installation.
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