Pentair RO-2550 Manuel D'installation Et D'opération page 11

REPLACING THE 3RD STAGE REVERSE OSMOSIS MEMBRANE
About the Reverse Osmosis Membrane
When used under operating conditions specified on page 2 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 odors 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.
NOTE: 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.
Do not disconnect tubing from membrane cap.
CAUTION:
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.
The rubber O-ring provides the water-tight seal
CAUTION:
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 Replacing the Pre-Filters and
Post-Filter on page 9.
To replace the membrane, see Step 10: Installing the
Membrane on page 6.
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.
When the membrane and cartridges have been changed, follow
the system start-up procedure in Step 12: System Start-up.
PENTAIR RO-2550 Installation and Operating Instructions • 11