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Maintenance - Kenmore E L I T REVERSE OSMOSIS SYSTEM 625.38556 Owner's Manual

Reverse osmosis system
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PREFILTER/POSTFILTER
MAINTENANCE
NOTE: It is recommended
to replace the battery, prefilter
and postfilter
cartridges
at least every 6 months
of prod-
uct water use. Replace more often if they begin to plug
with sediments.
The prefilter
and postfilter
are replaceable
sediment
car-
tridges with activated
carbon in its composition.
See
Figure 25. You must periodically
replace the prefilter
and
postfilter
cartridge.
This will protect
the RO membrane
from being destroyed
by chlorine. It will also prevent
the
filters from plugging
with sediments.
You may notice a slower output of product
water as the
prefilter
and postfilter
build up with sediments.
Replace
the prefilter
and postfilter
cartridges
when this occurs.
You should replace the battery
whenever
you replace the
cartridges.
RO MEMBRANE
CARTRIDGE
MAINTENANCE
The Reverse Osmosis
cartridge
is a tightly wound
special
membrane.
See Figure 25. The membrane
reduces
the
dissolved solids and organic matter. The life of the
Reverse Osmosis
membrane
cartridge
depends
mostly
on the pH and hardness
of the supply
water. (see specifi-
cations). Cartridge
life is shorter with higher pH. For
example,
if supply water pH is from 6.8 to 7.7, the car-
tridge may last for well over one year. However,
car-
tridge life may be as short as 6 months
if the pH is as
high as 8.5 to 10. Higher pH weakens
the cartridge
mem-
brane and causes pin-hole
leaks, it's time to replace the
Reverse Osmosis
cartridge
when the production
rate
and/or quality of product
water drops. Product
water
may begin to taste different
or bad, indicating
solids and
organics
are passing
through
the Reverse Osmosis
mem-
brane. See Reverse Osmosis
cartridge
replacement.
REVERSE OSMOSIS
CARTRIDGE
REPLACEMENT
Complete
the following
steps to replace the cartridges.
1. If possible,turn
off the water supply
to the RO system.
2. Remove (turn to the left) the pre filter cartridge
from
the filter head to relieve pressure
on the Reverse
Osmosis
cartridge.
3. Remove the Reverse Osmosis
cartridge.
4. Remove the postfilter
cartridge.
5. Discard the cartridges
in a proper
manner.
6. install new cartridges
in reverse order (postfilter,
Reverse Osmosis
and then prefilter).
Turn cartridges
to
the right to re-attach
to the filter heads.
7. Remove and replace the timer battery. See Figure 29.
8. Turn on the water supply to the RO system.
9. Purge the Reverse Osmosis
membrane
cartridge.
See
page 17 for instructions.
Cover
Turn to the left
to remove
Postfilter
Cartridge
RO
Cartridge
Prefilter
Cartridge
Figure 25
PREFILTER/POSTFILTER
CARTRIDGE
REPLACEMENT
Complete
the following
steps to replace the cartridges.
1. If possible, turn off the water supply
to the RO system.
2. Remove the pre filter cartridge
(turn to the left) from
the filter head. Then remove the post filter cartridge.
3. Discard the cartridges
in a proper
manner.
4. install new cartridges
in reverse order (postfilter
first,
then pre filter). Turn cartridges
to the right to re-attach
to the filter heads.
5. Remove and replace the timer battery. See Figure 29.
6. Turn on the water supply to the RO system.
7. Purge the Reverse Osmosis
membrane
cartridge.
See
page 17 for instructions.
Questions?
Call The Kenmore
Water Line 1-800-426-9345
or visit KenmoreWater.com
2O

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