Brita Redi-Twist USS-335 Manual De Instrucciones página 22

connect to auxiliary faucet
Prefilter/Postfilter
Maintenance
The pre-filter and post-filters are replaceable activated carbon cartridges, Brita
are located in the 1st and 3rd positions of the 3-stage system. It is recommended to replace the pre-filter
and post-filter cartridges at least every 6 months of product water use. The pre-filter and post-filter ARE
BOTH Brita Redi-Twist™ USF-201 cartridges. You may need to replace these filters more often with a great
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deal of use or a high level of incoming sediment. This will protect the RO membrane from being destroyed
by chlorine and plugging with sediments. You may notice a slower output of product water as the pre-filter
builds up with sediments. Replace the pre-filter and post-filter cartridges when this occurs.
RO Membrane Cartridge Maintenance
The Reverse Osmosis cartridge (Brita
center position of the 3-stage system. The membrane reduces the dissolved solids and organic matter. The
life of the Reverse Osmosis membrane cartridge depends on the pH and hardness of the supply water (see
specifications). Membrane life is shorter with higher pH. For example, if supply water pH is under 7.5, the
cartridge may last up to 12 months. However, cartridge life may be as short as 6 months if the pH is higher
than 8.0. Higher pH weakens the cartridge membrane and causes pin-hole leaks. It's time to replace the
Reverse Osmosis cartridge when the production rate and quality of the output water drops. The output
water may begin to taste different, indicating solids and organics are passing through the RO membrane.
See Reverse Osmosis cartridge replacement.
The Reverse Osmosis cartridge output and flow rate is generally determined by three factors:
1. Temperature of incoming water. The lower the temperature is directly proportional to the slower flow rate.
All Reverse Osmosis membranes are tested at 77° Fahrenheit. However, incoming water should not exceed
100° Fahrenheit. You need to ensure that the Reverse Osmosis system is placed in a climate controlled area
and does not have the potential to freeze.
2. TDS (total dissolved solids) present in the incoming water. More TDS requires more time for the
membrane to filter and remove. Ensure incoming TDS does not exceed 2000 ppm.
3. Incoming water pressure is one of the key factors determining the flow rate of the RO membrane. Higher
pressure will enable a higher flow rate. Pressure must be above 40 PSI for proper operation. You may need
to install a Booster Pump if your pressure is below 40 PSI.
Drain Flow Restrictor:
The drain flow restrictor is vital for proper operation of the RO membrane cartridge. The restrictor keeps
water flowing through the membrane at the proper rate. This is to ensure the system produces the best
quality water. Periodically check the restrictor assembly to be sure it is clean and unrestricted. If the drain
flow assembly requires service, review Step 6.
Check Valve: The check valve is vital for proper operation of the Reverse Osmosis system. The check valve
ensures that the product water is flowing in the proper direction, and does not allow it to flow backwards. If
the check valve requires service, disassemble by removing the (5) screws and review Step 6.
Automatic Shut-Off: The automatic shut-off conserves water when the storage tank is full by turning the
system off until more product water is needed. If the automatic shut-off requires service, disassemble by
removing the (5) screws and review Step 6.
Change Quick Connect Collet and O-Ring:
1. Remove the collet and o-ring from the fitting with a small screwdriver. Be careful not to scratch the
internal walls of the collet port.
2. Clean collet port, lubricate and insert the o-ring seal into the bottom of the port.
3. Push the collet inward until it locks in place.
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Redi-Twist™ USF-205) is a tightly wound membrane located in the
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Redi-Twist™ USF-201. They
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