Sears RO 2000 To Replace Flow Control and Screen, To Replace the RO Cartridge, CARTRIDGE... see

- CARE OF YOUR HOME DRINKING WATER SYSTEM -

RO MEMBRANE CARTRIDGE - The useful life of the membrane cartridge depends mostly on the pH (see page 17) of your supply water. The lower the pH, the longer the membrane will last. For ex- ample, if the feed water has a pH of about 7.0, the cartridge may last for over 1 year; but if the pH is high, cartridge life may be shortened. The high pH weakens the membrane and makes pin hole leaks.

NOTE: The amber "RO" light on the faucet base

will begin to flash when RO water quality drops so less than 75% of the TDS are removed from the

supply water.

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

for the RO membrane to become useless. A small, cone-shaped screen is positioned over the flow con-

trol (FIG. 9) to help keep the flow control clean.

Every time you work on the RO system, check the flow control and screen to make sure they are clean.

TO REPLACE FLOW CONTROL AND SCREEN

CAUTIONS: To install the screen, place the cone end into the RO cap. Then carefully push it in us- ing 1/4" tubing as a tool. Do not force in farther after you feel resistance. Visually check to be sure it is properly positioned.

When installing the flow control, tighten the nut by hand, then another 1/4 to 1/2 turn with a pliers. DO NOT OVERTIGHTEN AND DISTORT OR CRUSH THE TUBING AND FLOW CONTROL.

that the system is performing satisfactorily.

TO REPLACE THE RO CARTRIDGE

1.Refer to page 13 and follow instructions under "To Replace the Prefilter Cartridge".

2.Remove and replace the flow control and screen (see steps on this page).

3.Turn on the water supply and PURGE THE RO

CARTRIDGE... SEE PAGE 11.

BATTERIES IN ELECTRONIC BOX - Always replace the batteries (4, "AA" alkaline) in the elec- tronic control box after installing a new prefilter car- tridge and postfilter. Good batteries assure proper operation of the indicator lights. Removing the bat- teries also resets the 6 month or 900 gallon period for monitoring the filter cartridges. See FIG. 7 on

page 10.

FLOW CONTROL - A clean flow control is a must

for the RO membrane to make high quality product water. The flow control keeps water flow through the membrane at the right rate to get the best quality product water. If the control becomes plugged, so water can't get through, it will only take a short time

SERVICING THE BLADDER

If the bladder should require inspection and replace- ment, use the following guides. Refer to the parts illustration on page 18.

CAUTION: BE SURE TO RELIEVE PRESSURE, STEPS 1,2 AND 3, Bo'n'OM OF PAGE 12.

1.Remove the vacuum relief valve (use 7/16" socket).

2.Rotate the tank shutoff valve 90 o and pull from the RO housing.

3.Apply downward pressure on the RO cap while rotating counterclockwise 90 o.

NOTE: If the cap turns in the RO housing, first do steps 1 and 2 under "To Replace the Prefilter Car- tridge", page 13.

4.Lift the RO housing out of the liner assembly and

PLACE WHERE CLEAN AND SANITARY.

5.Remove the bladder.

NOTE: BE SURE THE INNER SURFACE OF THE

REPLACEMENT BLADDER, AND THE OUTER SURFACE OF THE RO HOUSING ARE CLEAN. USE DISH SOAP AND HOT WATER TO CLEAN AND RINSE.

6.Install the bladder into the liner assembly. Wet the top bead of the bladder with water, or apply a light coating of silicone grease.

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