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How Your Reverse Osmosis System Works - Kenmore 625.38575 Owner's Manual

Reverse osmosis drinking water system
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- HOW YOUR REVERSE OSMOSIS SYSTEM WORKS -
PREFILTER
Water
from
the cold supply
pipe
enters
the RO as-
sembly
prefilter
first
(Figure
8, page
8, and
sche-
matic,
page
11).
The prefilter
has
a replaceable
sediment
cartridge
with
activated
carbon
in its composition.
The car-
tridge
(10 micron)
removes
sand,
silt, dirt, other
sedi-
ments,
and up to the ppm
of chlorine
shown
in the
specifications
from
the feed
water
(page
16). Chlo-
rine will destroy
the RO membrane.
Filtered,
clean,
chlorine-
free water
flows from the prefilter,
to the RO
membrane
cartridge.
IMPORTANT:
See pref!lter
maintenance,
page 12.
REVERSE
OSMOSIS
(RO) CARTRIDGE
The RO cartridge
is a tightly
wound
special
mem-
brane.
The membrane
removes
the dissolved
solids
and organic
matter
when
water
is forced
through
the
cartridge.
High
quality
product
water
(about
one
ounce
per minute)
exits the RO cartridge
and goes to
the storage
tank,
or to the postfilter
and RO faucet.
Reject
water,
with
the dissolved
solids
and organic
matter,
is routed
through
the flow control
and to the
drain.
Green - RO membrane
and filters
are good.
Amber
-
Warning,
filters
will need
replacing
shortly.
Filters
need
replacing,
when
water
has been
drawn,
after
182 days
(or 750 gallons
have been used).
Red - RO
membrane
needs
to be replaced.
When
the two "AA"
batteries
are first applied
at ini-
tial start up, the LED indicator
light will flash in a red,
amber,
green
sequence.
All timers
and counters
are
reset to zero.
In order
to reset the monitor
time and
gallon
count
feature,
the batteries
should
be removed
for a mini-
mum
of five seconds
and then reinserted.
Batteries
need
to be replaced
once a year at the time
of filter replacement.
Do not mix battery
types,
use
only "AA"
alkaline
batteries,
hnproper
placement
of
batteries
could
damage
electronics.
Use care when
inserting
batteries
to align them correctly
in manifold
with the proper
polarity.
STORAGE
TANK
The storage
tank
holds
up to 2.3 gallons
of product
water.
A diaphragm
inside
the
tank
keeps
water
pressurized
to about
30 psi, when
the tank
is full, to
provide
fast flow
to the RO faucet.
The tank,
when
empty,
is pressurized
to 5 - 7 psi.
POST
FILTER
After leaving
the storage
tank, but before going to the
R© faucet,
product
water
goes through
the post filter.
The post filter is an activated
carbon
type filter. Any
remaining
tastes
and
odors
are removed
from
the
product
water.
Taste-free,
odor-free,
clean,
high
quality
drinking
water
is available
for use.
FAUCET
The sink or countertop
faucet
has a hand
operated
knob
to access
drinking
water.
An air-gap
is built
into
the
faucet
drain
water
connection
to comply
with plumbing
codes.
FAUCET
ELECTRONICS
The RO system
will monitor
the total product
flow of
the unit and also length
of time the filters
have been
installed.
The faucet
base has an indicator
light that
flashes
to inform
you of the status
of the R© mem-
brane
and filters.
SHUTOFF
ASSEMBLY
To conserve
water,
the drinking
water
system
has an
automatic
shutoff
system.
When
the storage
tank has
filled
to capacity,
and the
drinking
water
faucet
is
closed,
pressure
closes
the shutoff
to stop
flow
to
drain.
Pressure
in the storage
tank is about
half of the
water
supply
pressure.
After drinking
water
is used,
and pressure
in the system
drops,
the shutoff
opens
to allow
water
flow again.
CHECK
VALVE
A check
valve
(Figure
14) is located
in the RO man-
ifold,
above
the center
sump.
The check
valve
pre-
vents
a backward
flow
of product
water
from
the
storage
tank. A backward
flow could
rupture
the RO
membrane.
FLOW CONTROL
Water
flow through
the R© membrane
is regulated
by the flow control.
It maintains
the desired
flow rate
to obtain
the highest
quality
drinking
water.
The
flow control
is located
in the end of the 1 / 4" red drain
tubing,
at the R© manifold
drain
port.
10
Problems,
Questions?
Call 1-800-426-9345
Kenmore
Water Line

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