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Care Of Your Reverse Osmosis System - Kenmore 625.3847 Owner's Manual

Reverse osmosis drinking water system
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- CARE OF YOUR REVERSE OSMOSIS SYSTEM -
To keep
your
reverse
osmosis
system
operating
and
producing
high
quality
water,
you
must
make
sure
supply
water
is always
within
the limits
shown
in the
specifications.
Good
supply
water
helps
to assure
longer
life from the RO membrane
cartridge,
prefilter
and postfilter
cartridges.
However,
each of these will
wear
out in time and need replacement.
This reverse
osmosis
system
contains
a replaceable
treatment
component
critical for effective
removal
of
total dissolved
solids.
The water
should
be tested
periodically
to verify the system is performing
satis-
factorily.
If the RO assembly
is wall mounted,
you may be able
to replace
parts
with the assembly
left on the wall. If
not, simply
lift the RO assembly
from
the mounting
washers
and lay on the cabinet
floor when
replacing
the prefilter
and post filter cartridges
and RO mem-
brane.
Note: To prevent
spillage,
place
a container
under
the RO assembly,
or put the RO assembly
in a con-
tainer
to catch the water.
CAUTION:
Before
disconnecting
parts, be sure to
close
the water
supply
valve
to the RO.
PREFILTER
AND
POST
FILTER
CARTRIDGES
You must
replace
the pref!lter
cartridge
often
to pro-
tect the R O membrane from being destroyed
by chlorine,
and/or
from plugging
with sediments
in your water
supply.
If the water
supply
contains
both
chlorine
and sediments,
replace the prefilter
cartridge
at least
every
6 months
of product
water use. Replace
more
often
than
6 months
if it begins
to plug
with sedi-
ments.
If the water
has sediments
only, with no chlorine,
you
may
notice
a slower
making
of product
water
as the
prefilter
collects
the sediments.
When
this occurs,
re-
place
the prefilter
cartridge.
Also replace the post filter
cartridge.
To replace
the filter cartridges
(see FIG. 9):
1. Turn off the water supply
and open the RO faucet
to relieve
pressure.
2. Remove
(turn
to the left) both sumps
from the filter
heads.
Be careful...the
sumps
are full of water.
3. Remove
and discard
the inner
cartridges
in a prop-
er manner.
Flush the insides
of the sumps
with fresh
water.
Do not lose the large o-ring
seals.
4. Insert new cartridges,
and with lubricated*
o- rings
in place,
turn on and tighten
the sumps.
Note: The prefilter
cartridge
has light
gray netting
and end caps. The postfilter
has blue. Do not inter-
change,
*Note: Use a lubricant
approved
for use on a potable
water
supply.
mounting
FIG. 9
_
washers (2)
(RO cartridge
o-ring seals on
this end)
cartridge
o
posffUter
(blue)
o-ring
l
o-ring seal
seal
RO cap
Turnsumpsinthe
direction of the arrow
to remove. Turn
opposite way to install
and tighten.
sump
RO MEMBRANE
CARTRIDGE
The
life of the
RO
membrane
cartridge
depends
mostly
on the pH of the supply
water
to the RO sys-
tem (see specifications).
Cartridge
life is shorter
with
higher
pH. For example, if supply
water pH is from 6.8
to 7.7, the cartridge may last for well over 1 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 RO cartridge
when
the pro-
duction
rate and/or
quality
of product
water
drops.
Product
water
may begin
to taste different
or bad, in-
dicating
solids
and organics
are passing
through
the
RO membrane.
To be sure it is the RO cartridge,
re-
place
the prefilter
and postfilter
cartridges
first.
To replace
the RO cartridge
(see FIG. 9):
1. Turn off the water supply
and open the RO faucet
to relieve
pressure.
continued
11

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625.384700