Kenmore 625.38575 owner manual HOW Your Reverse Osmosis System Works

- 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.

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.

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.

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.

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Problems, Questions? Call 1-800-426-9345 Kenmore Water Line