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Cartridge Maintenance; Cartridge Replacement - Kenmore 625.381560 Owner's Manual

Reverse osmosis drinking water 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 car-
tridges.
RO MEMBRANE
CARTRIDGE
MAINTENANCE
The Reverse Osmosis cartridge
is a tightly
wound
special
membrane.
See Figure 25. The membrane
reduces the dis-
solved solids and organic
matter. The life of the Reverse
Osmosis membrane
cartridge
depends
mostly on the pH
and hardness of the supply water.
(see specifications).
Cartridge
life is shorter with higher
pH. For example,
if
supply water
pH is from 6.8 to Z7, the cartridge
may last
for well over one year. However,
cartridge
life may be as
short as 6 months if the pH is as high as 8.5 to 10. 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/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 membrane.
See Reverse Osmosis car-
tridge
replacement.
REVERSE OSOMOSIS
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.
Z Remove and replace
the timer battery.
See Figure 14.
8. Turn on the water
supply to the RO system.
9. Purge the Reverse Osmosis membrane
cartridge.
See
page 17 for instructions.
Prefilter
Cartridge
i
RO Cartridge
Postfilter
Cartridge
Turn to the left
to remove
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 14.
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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