US Water Systems american revolution, Installation And Maintenance Manual

Page: 9 / 17

Installation Instructions
Residential Reverse Osmosis Drinking Water System
Page 9
Maintenance
Your RO system contains filters and membranes which must
be replaced periodically for proper operation.
NOTE: Change-out procedures may be amended, depending
on source water conditions.
Your Reverse Osmosis System has been tested to ensure it
will operate correctly. The following periodic maintenance is
recommended so your system will provide years of trouble-
free service:
NOTE: Filter change frequencies may be amended, depending
on source water conditions.
To change filters and membranes follow these procedures:
1. Close feed water valve by turning it clockwise.
2. Open faucet to allow holding tank to drain.
3. Loosen and remove filter housings using wrench provided
and discard cartridges and or membrane.
4. Wash the inside of the housings using mild detergent and
soft cloth. Thoroughly rinse all soap before reassembly.
5. Replace filter cartridges and membrane before sanitizing
system.
NOTE: The system should be sanitized before installing the
activated carbon post filter cartridge.
Sanitizing instructions
To sanitize system follow these procedures with the feed
water valve closed:
1. Remove pre-filters and membrane from housings.
2. Use 5-1/4% unscented bleach such as Clorox.
3. Add one cap full (2 tsp. or 10 ml) of bleach to each pre
-filter housing and membrane module.
4. Carefully re-fill housings with tap water and
temporarily replace WITHOUT carbon cartridge,
sediment cartridge or membrane installed.
5. Slowly open the feed water line at faucet.
6. Close faucet as soon as water begins to drip out of
spout.
7. Let system stand for approximately 15 minutes.
8. After fifteen minutes do the following in order:
9. Close feed water valve.
10. Close holding tank valve while faucet is open to release
pressure.
11. Remove housings and empty them.
12. Remove any protective wrap from pre-filters and
membrane and install them in the appropriate filter
housings. NOTE:
Be sure to check O-rings are in
place when installing cartridges in filter housings.
Tighten with wrench.
13.
Replace post carbon filter if necessary. Disconnect
product water tubing from the holding tank and put 50
drops of bleach into the tubing. Reconnect tubing.
14.
Slowly open feed water valve. When water begins to
drip from faucet, close faucet and open holding tank
valve. Do not open faucet for at least eight (8) hours.
15. Discard the first two tanks of water produced, as they
contain chlorine.
Do not use this water.
16. When faucet is first opened, air and black carbon
powder may be noticed. This is normal.
Water quality
Water quality from an RO system is normally determined with
a TDS Meter, which measures total dissolved solids in water,
measuring conductivity. The results are normally measured in
parts per million or milligrams per liter. Fewer dissolved solids
results in higher quality water.
RO membranes are rated by the amount of dissolved solids
they reject expressed as “rejection percentage”.
For example:
If feed water contains 100 ppm of dissolved solids and the
product water after the membrane has 10 ppm of dissolved
solids the rejection rate is 90%.
The formula is as follows:
RO membranes should operate between an 80-97% rejection
rate. Once the rejection falls below 80%, the membrane must
be replaced.
Replacement part Frequency
Pre-filter (sediment) Every 6-12 months.
Pre-filters (activated carbon) Every 6-12 months.
R/O membrane Every 3-5 years
Post filter (carbon) Every 6-12 months.
Percent Rejection
=
(Feed H
2
O TDS - Product H
2
O TDS) x 100%
Feed H
2
O