10
Section 3: Operation and Maintenance
Operation of your Reverse Osmosis System is simple and easy. This appliance is fully
automatic and can be enjoyed without complicated operating procedures. Be sure to follow the
cartridge replacement schedule to ensure peak performance and long membrane element life.
Changing Filter Cartridges and Sanitizing Procedure
The filter cartridges should be changed, as a rule of thumb, every three months. It is critical that
this be done, to ensure that chlorine is not allowed to attack the membrane film.
!
THOROUGHLY WASH HANDS BEFORE LOADING CARTRIDGES AND MEMBRANE
ELEMENTS.
1. Close the cold water supply valve. Open the faucet and completely drain until the flow
of water stops. Remove the filter housing bowls with the housing wrench and discard
the old filter cartridges (do not remove or replace the post carbon filter at this point).
Thoroughly clean the inside of the housing bowls with soap and water. Rinse
completely. Put ½ oz of RO cleaning solution (part#: ACCS-WCRF-0001) in the PRE-
FILTER housing. Reassemble filter housings WITHOUT cartridges.
2. Disconnect the elbow fittings from the membrane housing, and replace the original
membrane housing with the cleaning housing included with your RO system. Connect
the elbow fittings to the cleaning housing.
3. Turn on the cold water supply valve and faucet, let system fill up with chlorinated water.
Wait until water flows from faucet, then close faucet to allow tank to fill up. Wait
approximately 5 minutes.
4. Turn the cold water supply valve OFF. Allow the system to stand for 1 hour.
5. Open the faucet and allow the system to completely drain. Disconnect the elbow fittings
from the cleaning housing and put the original membrane housing back to the system by
reversing the step 2. The system has now been sanitized and is ready to load the new
cartridges.
6. To load the cartridges, repeat Step 9 from the installation instructions above. Replace
the post carbon filter by disconnecting the both Tee fitting and faucet tube from the old
filter, discarding the old filter and reconnecting the fitting and faucet tube to the new
filter. Turn the raw water supply valve ON. Allow the storage tank to fill and then drain it
completely and refill again before resuming use of the water system.
Changing the Reverse Osmosis Membrane
The membrane element will require changing much less frequently than the filter cartridges and
only when failure is indicated. This should be done when water production begins to noticeably
fall, or TDS readings in the product water begin to rise.
T
otal
D
issolved
S
olids may be
measured by a professional or by use of a simple hand-held TDS monitor. These are available
from your dealer or from Waterite’s Online Store at www.waterite.com (the RO405400TNX
comes with a TDS meter preinstalled).
