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How Your Reverse Osmosis System Works - Kenmore 625.381560 Owner's Manual

Reverse osmosis drinking water system
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HOW YOUR REVERSE OSMOSIS SYSTEM WORKS
Introduction:
Your Reverse Osmosis (RO) Drinking
Water
System uses your household
water
pressure to force water
through
three filters.
Minerals
and impurities
are filtered
out. Delicious
tasting
drinking
water
goes to the storage
tank-ready
for your use. Minerals
and impurities
are sent
clown the drain. The following
paragraphs
will explain
in
detail
how your Reverse Osmosis
Drinking
Water
System
works.
Prefilter: Water
from the cold supply pipe enters the pre-
filter. See Figure 24. The prefilter
is a replaceable
sedi-
ment cartridge
with activated
carbon
in its composition.
The cartridge
reduces taste, odor, sand, silt, dirt, other
sediments,
and up to the amount
of chlorine
shown in the
specifications.
Reverse
Osmosis Cartridge:
Filtered water
flows from the
prefilter,
to the Reverse Osmosis membrane
cartridge.
See
Figure 24. The Reverse Osmosis cartridge
is a tightly
wound
special
membrane.
The membrane
reduces the dis-
solved solids and organic
matter.
High quality
product
water
(about one ounce per minute) exits the Reverse
Osmosis cartridge.
The product
water
flows to the storage
tank, postfilter
or Reverse Osmosis faucet.
See Figure 24.
Reject water, with the dissolved
solids and organic
matter,
is routed to the drain.
See Figure 24.
Storage Tank: The storage tank holds product
water. See
Figure 24. A diaphragm
inside the tank holds water
pres-
surized to about
30 psi when the tank is full. This provides
fast flow to the Reverse Osmosis faucet.
When the tank is
empty of water, it is pressurized
to 5 - 7 psi.
Postfilter:
Before going
to the Reverse Osmosis faucet,
product
water
goes through
the postfilter.
See Figure 24.
The postfilter
is an activated
carbon
type filter. Any
remaining
tastes and odors are reduced
from the product
water. Clean, high quality
drinking
water
is available
at
the faucet.
Reverse Osmosis
Faucet:
The sink or countertop
faucet
has a hand operated
knob to access drinking
water. See
Figure 24. An air-gap
is built into the faucet drain water
connection
to comply
with plumbing
codes. See Figure
24.
Faucet Electronics: Inside the faucet
base is a battery
operated
6 month timer. See Figure 14. An amber
LED
indicator
is also located
in the front of the faucet
base.
This LED will flash continuously
after 6 months have
passed. This indicates
that it is time to replace
the bat-
tery, prefilter
and postfilter.
Shutoff Assembly:
The unit has an automatic
shutoff
sys-
tem to conserve
water. When
the storage tank has filled
to capacity,
and the drinking
water
faucet
is closed, pres-
sure closes the shutoff
to stop flow to the drain. After
enough drinking
water
is used, pressure in the system
drops, and the shutoff
opens to allow
the tank to be
refilled.
See Figure 24.
Check Valve:
A check valve is located
in the Reverse
Osmosis manifold,
above the center sump. The check
valve prevents a backward
flow of product
water
from
the storage tank to drain. A backward
flow could
dam-
age the Reverse Osmosis Membrane.
See Figure 24.
Flow Control: Water
flow to the drain is restricted
by the
flow control.
It maintains
the desired
flow rate to obtain
the highest quality
drinking
water. The flow control
is
located
inside the elbow fitting
on the Reverse Osmosis
manifold
drain port. See Figure 24.
Questions?
Call
The
Kenmore
Water
Line 1-800-426-9345
or visit
KenmoreWater.com
18

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