Kenmore 625.3847 User manual

OWNER'S
MANUAL
MODEL NO.
625.384700
Caution:
Read and Follow
All Safety Rules and
Operating Instructions
Before First Use of
This Product.
If you have questions when
installing, operating or
maintaining your reverse
osmosis system, call this
toll-free number...
1-800-426-9345
SAVE THIS MANUAL
PRINTED IN U.S.A.
Reverse Osmosis
Drinking Water System
• Warranty
• How To Install
• How It Works
• Care Of
• Repair Parts
System tested and certified by NSF International I _/'=.,.,==_
to ANSI/NSF Standard 58 for the reduction of the
c a ms spec fed on the performance data sheet.
Sears, Roebuck and Co., Hoffrnan Estates, IL 60179 U. S. A.

- WARRANTY-
1 li I I /liJ I Ill li I I _I Ill I /I lill_
IFULL WARRANTY ON REVERSE OSMOSIS DRINKING WATER SYSTEM =
=(except filter cartridges and R. O. membrane) =
I For one year from the date of purchase, when the Reverse Osmosis Drinking Water System is installed I
and maintained in accordance with our instructions, Sears will repair, free of charge, defects in material I
= and workmanship, except filter cartridges and the R. O. membrane, t
I!
I TO OBTAIN WARRANTY SERVICE, SIMPLY CONTACT THE NEAREST SEARS SERVICE CENTER I
THROUGHOUT THE UNITED STATES. This warranty applies only while this product is in use in the I
United States.
!I
I Thiswarrantygi_es__uspe_ifi_Iega_rights_andy_umayha_e_therrightswhich_aryfr_mstatet_state_ I
II
i Sears, Roebuck and Co., D/817 WA, Hoffman Estates, IL 60179 i
I_ ............................. _1
SEARS INSTALLATION POLICY
All installation labor arranged by Sears shall be per-
formed in a neat, workmanlike manner in accor-
dance with generally accepted trade practices. Fur-
ther, all installations shall comply with all local laws,
codes, regulations, and ordinances. Customer shall
also be protected during installation by insurance re-
lating to Property Damage, Workman's Compensa-
tion and Public Liability.
SEARS INSTALLATION WARRANTY
In addition to any warranty extended to you on the
Sears merchandise involved, which warranty be-
comes effective the date the merchandise is installed,
should the workmanship of any Sears arranged
installation prove faulty within one year, Sears will,
upon notice from you, cause such faults to be cor-
rected at no additional cost to you.
- SAFETY GUIDES -
• Read all steps and guides carefully before instal-
ling and using your reverse osmosis system. Follow
all steps exactly to correctly install. Reading this
manual will also help you to get all the benefits from
the reverse osmosis system.
•Do not attempt to use this product to make safe
drinking water from non-potable water sources. Do
not use the system on microbiologically unsafe wa-
ter, or water of unknown quality without adequate
disinfection before or after the system.
•Check with your local public works department
for plumbing and sanitation codes. You must fol-
low their guides as you install the system. Follow
your local codes if they differ with guides in this
manual.
•The reverse osmosis system works on water pres-
sures of 40 psi (minimum) to 100 psi (maximum). If
your house water pressure is over the maximum,
install a pressure reducing valve in the water supply
pipe to the reverse osmosis system.
• Do not install the reverse osmosis system out-
side, or in extreme hot or cold temperatures. Temper-
ature of the water supply to the reverse osmosis sys-
tem must be between 40°F and 100°F. Do not install
on hot water.
• Read the other limits (pH, hardness, etc.) in the
specifications and be sure your water supply con-
forms. Also see "Water Supply" on page 3.
•The reverse osmosis membrane contains a pre-
servative for storage and shipment. Be sure to purge
as instructed on page 9 before using product water.
2

- TABLE OF CONTENTS -
Where To Install the RO System ........ 4
Tools and Materials Needed ........... 4
Installation Steps .................... 5- 9
Cold Water Supply .................. 5
Drain Adapter ..................... 6
Faucet ............................ 6- 7
RO Assembly ...................... 7
Storage Tank, Tubing Connections .... 8
Installation Steps -continued
Sanitizing, Pressure Test, Purging .... 9
How the RO System Works ........... 10
Care of RO System ................... 11-14
Dimensions, Specifications ............ 15
Repair Parts ......................... 16-17
Remote Installation Locations ......... 18
- WHAT YOUR REVERSE OSMOSIS SYSTEM WILL DO -
Your Reverse Osmosis (RO) Drinking Water System
is a water treatment unit. It uses household water
pressure to reverse a natural physical process called
osmosis. Water, under pressure, is forced through a
semi-permeable membrane where minerals and im-
purities are filtered out. Clean drinking water goes to
the faucet or storage, while minerals and impurities
are sent to the drain with RO waste water. The miner-
als and impurities are measured in water as total dis-
solved solids (TDS).
The system includes replaceable pre and postfilter
sediment-carbon cartridges. The prefilter removes
sand, silt, dirt, rust particles, other sediments, and
chlorine from the water supply before it can enter the
RO membrane. The postfilter removes any tastes
and/or odors that may remain in the water, after
passing through the RO membrane, and just before
going to the RO faucet. To prevent water waste, an
automatic shutoff valve closes when the RO faucet is
closed and the storage tank is full.
Your reverse osmosis system gives you a continuous
supply of sparkling clear, delicious water for drink-
ing, cooking and other uses. Foods will look and
taste better too. Having high quality RO product wa-
ter at your fingertips eliminates the need to buy
bottled water. The storage tank holds over 2 gallons
of RO product water for your needs.
- BEFORE YOU BEGIN TO INSTALL THE RO SYSTEM -
FOR OPTIMUM PERFORMANCE YOUR KEN-
MORE REVERSE OSMOSIS SYSTEM SHOULD BE
INSTALLED ON SOFTENED WATER.
CAUTION: A refrigerator icemaker may not operate
properly when connected to a reverse osmosis sys-
tem.
Check Your Water Supply: The cold water supply to
the RO system must be within certain quality limits.
See the specification table on page 15. If supply water
is not within limits, the RO system can not make
product water as it should and reduced RO mem-
brane life will result.
Trained salespeople at Sears can arrange for a free
water analysis. The analysis will tell you if other wa-
ter supply treatment is needed before going to the
RO system.
CAUTION: Chlorine in the water will destroy the
RO membrane. Most cities add chlorine to the wa-
ter supply to kill bacteria. The prefilter removes
chlorine up to the limits shown in the specifications
before it enters the RO membrane. It is important
to replace the prefilter cartridge at least every 6
months. See the RO care guide on page 14.
Check Parts Included: Unpack the carton and re-
move the RO system. In addition to the assembled
RO and the storage tank, the system includes the
parts illustrated below, a separate length of tubing,
and this manual.
FIG. 1 ]
RO PRODUCT
WATER FAUCET
TUBING
ADAPTER _'
HANGER
WASHERS &
SCREWS
WATER _=a_,?_ )
SUPPLY
FITTING
I
©
TEFLON
TAPE
13 DRAIN
PTERt
3

- WHERE TO INSTALL THE RO SYSTEM -
The RO assembly and storage tank is designed for
installation under the sink, usually in the kitchen or
bathroom. The RO assembly mounts on a wall sur-
face, or can lay on the cabinet floor next to the storage
tank. Hanger washers and wood screws are included
for cabinet wall mounting. The RO product water
faucet installs on the sink, or on the countertop next
to the sink (pages 6 and 7).
Note: Tubing lengths allow for the removal of the
assembly from the hanger washers for servicing. If
tubing lengths are shortened for neater appear-
ance, it may be necessary to keep the assembly on
the hanger washers for service.
in any remote location from the faucet, observing
safety guides on page 2. You do need a nearby water
source and drain point (see page 18).
Water Supply: To provide supply water to the RO
system inlet, install pipe fittings for tubing connec-
tion, as typically shown on page 5.
Drain Point: A suitable drain point is needed for re-
ject water from the RO membrane. A floor drain,
laundry tub, standpipe, sump, etc., is preferred, as
shown in the remote locations drawing, page 18. A
sink p-trap drain adaptor is included to install where
codes permit, as an optional drain point (page 6).
You can also locate the RO assembly and storage tank RO
IRG. 2 ] / _--x _wate_:f°duuctt
drain adapter
sink drain RO Assembly
p-trap
- TOOLS AND MATERIALS NEEDED -
• adjustable wrench, standard pliers, and larger
adjustable jaw pliers or pipe wrench to fit sink drain
slotted and Phillips head screwdrivers
plumbers putty
• pipe joint compound (thread seal) approved for
use on potable water supplies
• electric drill and bits, if hole is needed for the RO
faucet, page 6 and 7
-6 STEPS TO INSTALL -
STEP 1: -Install Cold Water Supply fittings - page
5
STEP 2: - Install Drain Adapter - page 6
STEP 3: - Install Faucet - pages 6 and 7
STEP 4: - Install RO Assembly - page 7
STEP 5: - Install Storage Tank Make Remaining Tub-
ing Connections - page 8
STEP 6: - Sanitizing, Pressure Testing, Purging -
page 9
4

- STEP 1: INSTALL COLD WATER SUPPLY FITTING -
Check and comply with local plumbing codes as you plan, then install a cold feed (supply) water fitting. The
fitting must provide a leak- tight connection to the RO 1/4" tubing (see FIG. 8, page 8). Atypical connection
using the included water supply fitting is shown in FIG.3 - A below. An optional connection, using standard
plumbing fittings (not included), is shown in B.
A. WATER SUPPLY FITTING
1. Close the house main water shutoff valve and open
faucets to drain water from the sink cold water pipe.
2. Remove nut that connects the cold water faucet to
cold water plumbing.
3. Use pipe joint compound or Teflon tape on cold water
faucet stud threads and on the male threads of the water
supply fitting that connect to the cold water pipe.
4. Thread water supply fitting onto pipe and reconnect
nut to bottom of fitting.
B. OPTIONAL PIPE FITTINGS (compression type
shown)
Note: Be sure to turn offthe water supply and open
a low faucet to drain the pipe.
Complying with plumbing codes, install a fitting on
the kitchen cold water pipe to adapt 1/4" OD tubing.
A typical connection is shown in figure 3B. If
threaded fittings are used, be sure to use pipe joint
compound or Teflon tape on outside threads.
| WATER SUPPLY CONNECTION
1
FIG. 3 A.
J(using Included water supply fitting)
cold water
faucet stud water supply fitting
1/4" tubing to
RO inlet (see step
2, on page 8)
\
cold /
_;ter
cold water
f
shutoff
B. WATER SUPPLYTYPICAL CONNECTION
(using compression fitting)
-parts not included -
H
H
ii
cold water
shutoff
f
._/ 1/4" compression
fitting
f.-_ insert
cold _ 1/4" tubing to _'-_t
water RO inlet (see step _ "
pipe 2, on page 8)
5

- STEP 2: INSTALL DRAIN ADAPTER -
• Note: Running the drain tubing directly to a floor
drain, sump, standpipe, laundry tub, etc., as shown
on page 18, is preferred. However, if that is not pos-
sible or practical, the included drain adapter installs
in the sink drain pipe, always above or ahead of the
p-trap (FIG. 4). Be sure to comply with your local
plumbing codes. Other drain pipe fittings, in addi-
tion to the adapter, may be needed.
•The drain adapter fits 1-1/2" sink drain pipe.
•The adapter installs directly onto the sink tailpiece
as typically shown in FIG. 4 and 5.
•Locate so drain tubing from the faucet (installed in
step 1, page 8) makes a straight run to the adapter,
without dips, loops, low spots or kinks.
Note: Consult a plumber if you are not familiar with
plumbing procedures.
1. Use a ferrule and nut to assemble the drain tubing
connector to the drain adapter (FIG. 5). Turn the con-
nector to about 45 ° from the 12:00 position, as shown
(to 10:00 or 2:00 position as needed). Tighten the nut
securely.
2. Carefully disassemble the sink drain pipe and
clean the tailpiece to assure a leak-tight fit.
3. Install the drain adapter onto the sink tailpiece,
using a ferrule and nut. Snug the nut, but do not
tighten.
Note: If needed, to make fit, you can cut to shorten
the unthreaded end of the adapter. Do not cut too
short so the adapter will make a leak-tight seal with
the connecting fitting.
4. Assemble the p- trap to the drain adapter, and oth-
er drain pipe fittings as required (check codes) to
complete the drain run.
5. Tighten all connections, but do not overtighten and
break plastic fittings.
FIG. 4 ]
P-trap
FIG. 5 ] _nn
/
ferrule 0
cut, if
needed drain tubing
connector %
10:00_
2:00
- STEP 3: INSTALL FAUCET -
A. PREPARE MOUNTING HOLE
1. Select 1 of the following places for the faucet. Be
sure it will fit flat against the surface, and there is
space underneath for tubing (see FIG. 8, page 8).
Use an existing sink top hole for a spray hose or
other faucet. A1" to 1-1/4" diameter hole is need-
ed.
0 Drill a new hole in the countertop next to the
sink.
t Drill a new hole in the sink top.
CAUTION: To avoid damaging a sink beyond re-
pair, consult a qualified plumber or installer for
guides to drill holes in porcelain or stainless steel.
2. If drilling is needed, make the 1" to 1-1/4" diame-
ter hole.
3. Place plumbers putty around the drilled hole (FIG.
6) to prevent water leakage around the base of the
faucet.
6

- STEP 3: INSTALL FAUCET (cont.)-
B. ASSEMBLE FAUCET
1. If not already assembled, install the rubber washer,
spacer, flat (or lock) washer and hex nut onto the
threaded faucet stud.
2. Apply Teflon tape to the end of the faucet stud.
Turn the tubing adapter with a blue collet onto the
stud and hand tighten, then wrench 1/4 turn only.
BE CAREFUL NOT TO CROSS THREAD.
3. Wet the o-ring seals on the faucet spout. Then, re-
move and discard the short piece of tubing from the
faucet body and insert the spout in its place.
4. CONNECT TUBING TO FAUCET AS FOLLOWS.
a. Take the separate length of 3/8" black tubing put
an end through the larger hole in the rubber wash-
er. Slide the end onto the larger barb fitting on the
bottom of the faucet.
Note: To soften end of tubing, hold under hot water.
b. Route 1/4" red tubing from RO up through the
sink hole and slide end onto the smaller barb fitting
(heat end if needed) on the faucet.
c. Route 3/8" blue tubing from RO up through the
sink hole and push end all the way into the tubing
adapter fitting on the bottom of the faucet. Pull on
the tubing to be sure it's held firmly in the adapter
fitting. See pages 12 and 13 for tubing connection
instructions.
FIG. 6 ]
insert spou_
remove tub-
ing piece
ASSEMBLED IN
MOUNTING HOLE
rubber
washer _ =_,=_/spacer°ek
_.,_ hex nut
_._ tubing adapter
putty blue collet
5. Lower the faucet into the sink or countertop hole.
6. On the underside of the sink or countertop, insert
the large steel washer between the mounting hole
and the spacer on the faucet stud (see assembled
view). Then, turn the hex nut up to the spacer and
tighten. Tighten the hex nut so the faucet cannot
move, but do not overtighten and break the faucet.
- STEP 4: INSTALL RO
ASSEMBLY -
Hang the assembly on the included hanger washers,
or lay on the cabinet floor, as desired.
1. Refer to FIG. 7 for wall mounting. Hold the assem-
bly up to the wall surface and mark locations for the
hanger washers. Indicator marks on top of the brack-
et are the needed 10-1/2" apart.
2. Install hanger washers at least 15-1/2" up from the
cabinet floor, allowing room to remove sumps from
filter heads. Wood screws are provided, or obtain
other fasteners as needed.
steelwasher .J I _ holein sink or
__1-[ countertop
114"red tubing
to drain point _-_-// \ \/ /_
YJ
3/8"blue/TUBING FROM
tubing RO SYSTEM
FIG. 7 ]hanger I'_,_
washer (2) I_
screw (2) _(_) 10-1/2"
15-1/2"
min.
up from
floor
7

- STEP 5: INSTALL STORAGE TANK,
MAKE REMAINING TUBING CONNECTIONS -
1. CONNECT DRAIN TUBING, FAUCET TO
DRAIN ADAPTER: Referring to FIG. 8, run the loose
section (connected to faucet barb fitting) of black
3/8" tubing from the faucet to the drain adapter, with
a black collet, installed on page 6. Cut this tubing as
needed to route in as straight of a run as possible,
without loops, dips, low spots or kinks. Cut the end
of the tubing square. Then push all the way into the
fitting. Pull on the tubing to be sure it's held firmly
in the adapter fitting. See pages 12 and 13 for tubing
connection instructions.
2. CONNECT TUBING TO WATER SUPPLY: Con-
nect the feed (green) tube to the water supply fitting
installed on page 5. Connection to the fitting is as de-
scribed in Fig. 11, page 13.
3. Move the storage tankinto place next to the RO as-
sembly. You can stand the tank upright, or lay it on
side. Apply no more than 2 wraps of Teflon tape to
the threads on the nipple at the top of the tank. Hand
tighten the other included tubing adapter fitting
with the yellow collet onto the tank nipple, then
wrench 1/4 turn only. BE CAREFUL NOT TO
CROSS THREAD.
4. Run the 3/8" yeUow tubing to the fitting installed
in step 3. Be sure the end of the tubing is cut square,
and insert all the way into the fitting. Again, pull on
the tubing to be sure it's held firmly in the fitting.
I FIG. 8 I
water supply
TYPICAL UNDERSINK INSTALLATION
RO product
water faucet
- 3/8" black tubing, to
larger barb on faucet
Note: See note on page 4
regarding tubing lengths.
yellow collet
tubing adaptor
8

- STEP 6: SANITIZING, PRESSURE TESTING & PURGING -
SANITIZING
Sanitizing is recommended upon installation of the
RO system, and after servicing inner parts. It is im-
portant for the service person to have clean hands
while handling inner parts of the system.
CAUTION: Be sure to remove the RO membrane
and both filter cartridges as follows, before sanitiz-
ing. Chlorine will destroy the RO membrane car-
tridge.
1. Be sure the water supply to the RO is turned off,
and the RO faucet is open to relieve pressure.
2. Referring to FIG. 9, page 11, press inward while
turning the RO cap to the left (_) to remove from the
bracket/membrane housing. Remove (use pliers)
the RO cartridge from the housing. Place the car-
tridge in a clean plastic bag.
3. Be sure the o-ring sealis in the RO cap. Replace the
RO cap and push inward while turning to the right
(_) to lock.
4. Remove the postfilter sump, turning to the left.
Take the cartridge from the sump and place in the
plastic bag. Replace the sump and tighten securely.
5. Remove the preffiter sump and cartridge. Also
place this cartridge in the clean bag.
6. If needed to clean, flush the prefilter sump with
fresh water. Then fill with water to about 1" from the
top. Add 1.0 ounce of chlorine (ordinary 5.25%
household bleach...Hllex, Clorox, etc.) and mix in the
water. Do not add chlorine first. Concentrated it will
attack plastics.
7. Carefully replace the sump on the prefilter head
and tighten securely.
8. Slowly open the water supply to the RO.
9. Open the RO faucet by locking the lever upward
against the spout.
10. Allow water to circulate through the RO system
until you smell the bleach odor. Then close the faucet
and allow the RO to stand idle for 20 minutes.
11. After the 20 minutes open the RO faucet and run
water until the bleach odor is gone.
12. Turn off the water supply to the RO.
13. Be sure your hands are clean. Then, repeat steps
1- 5 and 7, only replace all cartridges.
Imp_'tant: Refer to FIG. 9, page 11, and to page 12
when replacing cartridges. The prefilter (left side)
cartridge has light gray coloring, and the postfilter
(right side) has blue coloring.
PRESSURE TESTING
1. Do the preceding sanitizing procedures before
pressure testing.
2. Open the water supply shutoff valve to the RO.
3. Open the main water supply valve and several
house faucets to purge air from the system. Close
faucets when water runs smooth.
4. In about 2hours, pressure will start to build in the
RO system. Then, carefully check all fittings and con-
nections for water leaks. Correct leaks if any are
found.
Note: When the system is first pressurized, water
may "spurt" from the faucet airgap hole until air is
expelled from the RO system.
PURGING RO MEMBRANE
Important purging instructions: The RO cartridge
contains a food grade preservative that should be re-
moved before using water from the system. The pre-
servative will give product water an unpleasant taste
and odor.
1. Allow the storage tank to fill for about 4 hours.
Then open the RO faucet until the tank is empty and
flow stops.
2. Close the RO faucet and allow the tank to fill again
for 4 hours. Then open the RO faucet and empty
again.
Repeat steps I and 2 to purge the storage tank 6 times. Then the RO system is ready to
make product water for use.
9

- HOW YOUR REVERSE OSMOSIS SYSTEM WORKS -
PREFILTER
Water from the cold supply pipe enters the RO as-
sembly prefilter first (FIG. 8 and schematic below).
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. Chlorine will de-
stroy the RO membrane. Filtered, clean, chlorine-
free water flows from the prefilter, to the RO mem-
brane cartridge.
IMPORTANT... See pref!lter maintenance, page 11.
REVERSE OSMOSIS (RO) CARTRIDGE
The cartridge inside of the RO housing is a tightly
wound special membrane. The membrane removes
the dissolved solids and organic matter when water
is forced through the cartridge. High quality product
water (about I ounce per minute) exits the RO hous-
ing and goes to the storage tank or to the postfilter
and RO faucet. Reject water, with the dissolved sol-
ids 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 from 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
RO 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,
spring-loaded closed lever to prevent the waste of
drinking water. You can also keep the faucet open by
pushing upward on the lever and locking it against
the faucet spout.
To comply with plumbing codes, an air- gap is built
into the faucet drain water connection.
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 into
the RO. 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 (FIG. 10) is located in the outlet end of
the RO housing, opposite of the cap. The check valve
prevents a backward flow of product water from the
storage tank. A backward flow could rupture the RO
membrane.
FLOW CONTROL
Water flow through the RO membrane is regulated
by the flow control. It maintains the desired flow rate
to obtain the highest quality drinking water. The
flow controlis located in the end of the 1 /4" red drain
tubing, at the RO housing drain port. A small cone-
shaped screen fits over the end of the flow control to
help prevent plugging with drain water sediments.
gravity
drain
PRODUCT
WATER
FAUCET
,,la=_l,,. YELLOW
'1
BLUE _PRODUCT WATER
WATER GREEN
IN
1
. REVERSE OSMOSIS
II./1' d_a,_nt_oOlW SCHEMATIC
,,ele rl]_ _'w RO MEMBRANE
[ l&l &t''*,I _&.q.._ .,__. .__._
check I_I:___ " ;_ f f _ •
valve_._O _= - -- _.-- -- _t=-- -- --
l,_p AUTOMATIC [_ ,,,,e=
SHUTOFF [_
REFILT: I
10

- 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 RO 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.
mountingFIG. 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
toremove.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

- CARE OF YOUR REVERSE OSMOSIS SYSTEM -
2. Press inward while turning the RO cap to the left
(_) to remove from the bracket/membrane housing.
3. Use a pliers, or heavy wire made into a hook, to
pull the RO cartridge from the housing.
Note: Sanitizing is recommended after servicing in-
ner parts of the system (see page 9).
4. Install the new cartridge, end with o-ring seals in-
ward. Work back and forth to get all the way in (end
of cartridge about 1-1/4" in from end of housing).
5. Lubricate the RO cap o- ring seal if dry. Replace the
o-ring into the cap. Press inward on the cap while
turning to the right (_)to lock. The cap will not go on
if the RO cartridge is not fully seated inward.
6. Check the flow control and screen (see below).
7. Purge the RO membrane cartridge following instruc-
tions on page 9.
5. Inspect the o-ring and collet. Replace if worn, cut
or otherwise damaged. Carefully replace into the
drain port.
6. Be sure the flow control is in the end of the tubing,
then push all the way into the fitting.
FIG. 10 ]TO
DRAIN
A
flow (control) insert
l/4"tubi, ng _"1 ]_screen
o-ringseal Jdrain
FLOW CONTROL AND SCREEN
The flow control is vital for proper operation of the
RO membrane cartridge. The control keeps water
flow through the membrane at the needed rate to ob-
tain the best quality product water.
Whenever servicing the RO system, check the flow
control to be sure the small hole through it is clean
and unrestricted. Also check and clean or replace the
cone-shaped screen in front of the control. The RO
membrane cannot discharge minerals and impuri-
ties to the drain if the flow control plugs with foreign
material. If this happens, it only takes a short time for
the membrane to foul and become useless.
ball
spring_
o-ring_
cap _check
,i valve
To clean/replace flow control and screen (FIG. 10):
1. At the drain connection, depress the collet (FIG.
11) with a finger while carefully pulling on the drain
tubing to remove.
2. Remove the flow control from the end of the drain
tubing. Be sure the center hole is clean.
3. Check the drain tubing to be sure it's clean. Then
insert the cleaned or new flow control into the tubing.
4. With a small screwdriver carefully remove the col-
let and o-ring from the drain port. Use a small need-
le-nose pliers or tweezers to remove the screen from
the drain port. Thoroughly clean or replace with a
new screen. Install pointed end down.
Note: Visually check to be sure it is positioned cor-
rectly.
TUBING CONNECTION
(all push-in fitting locations)
This RO system includes push-in fittings for quick
tubing connection at most locations. If working with
the fittings, do the following.
Connection (FIG. 11):
1. Use a sharp cutter or knife to cut the end of tubing
square.
2. Inspect the end (about 1") of the tubing to be sure
there are no nicks, scratches or other rough spots. If
needed, cut the tubing again.
3. Push tubing through the collet and all the way into
fitting. Full engagement is 11/16" for 1/4" tubing,
and 3/4" for 3/8" tubing.
continued
12

- CARE OF YOUR REVERSE OSMOSIS SYSTEM -
TUBING CONNECTION (continued)
If tubing other than tubing supplied with the system
is used, be sure it is of high quality, exact size and
roundness with a smooth surface.
AUTOMATIC SHUTOFF SERVICE
If the shutoff assembly requires service, be sure to
reassemble parts exactly as shown in FIG. 12, and to
reconnect tubing as shown on pages 10 and 16.
To Disconnect Tubing: Push the collet inward and
hold with a finger while pulling the tubing out.
FIG. 11 ]
cut tubing s_uare
' -7
I
k_ ....
I I
I
end of tubing round and
smooth, with no cuts,
nicks or flat spots
Tubingcorrectly cut and connected
collet ..._ [_
11116" (1/4" tubing
' engagement
r11- 3/4. (3/8. tubing)
tubin
collet (depress to
remove tubing)
Replacing collet end
o-ring seal
Push o-ring seal into
bottom of port, then
follow with collet.
tting
collet
Changing CoUet and O-ring (FIG. 11):
1. With asmall screwdriver remove the collet and o-
ring from the fitting.
2. Be sure the port is clean, then lubricate and insert
the o-ring seal to the bottom of the port.
3. Push the coUet inward until it locks in place.
rBm.._
I CAUTION I
IDO NOT USE VINEGAR OR OTHER ACID I
IBASEDCLEANERSONTHISROSYSTEM. THEY I
I WILL DEGRADE SOME RO SYSTEM PARTS. AL- I
[WAYS USE SOAP AND WATER. I
t1
I This reverse osmosis system contains a replaceable I
] treatment component critical for effective removal I
I of total dissolved solids. The water should be [
I tested periodically to verify the system is perform- I
[ ing satisfactorily. [
I- ........ -I
FIG. 12 ]
screw (4)
SHUTOFF
ASSEMBLY
f<_>_ Tee Fitting,
./1/4" NPT x3/8"
_- _ Tube
diaphragm O
plunger (_
diaphragm O
Elbow fitting turns__/_'_
int° OUT P°rt'_ _, Male Connector,
,, _ / 1/8"NPTxl/4"Tube
Male Elbow, I/8 _ ..._... /
.PTx 1/4"Tob+ng
J collet
13

- CARE OF YOUR REVERSE OSMOSIS SYSTEM -
REVERSE OSMOSIS SYSTEM CARE GUIDE
MODEL NO. 625.384700
1. AT LEAST every 6 months, replace the prefilter and postfilter cartridges. Clean or replace the flow control and
screen.
2. Replace the RO membrane cartridge when the percent rejection of total dissolved solids (TDS) is less than shown
in the specifications (see B, below).
If any of the following occur before the 6 months, replace as directed.
A. Slow Making of Produot Water: Replace the prefiltercartridge. C. Ch/orine Tasteand/or Odor: Replace the prefilter,postfilter and
Ifthe production ratedoes not improve, replace the postfilter car- RO membrane cartridges.
tridge and RO membrane cartridge.
B. High Total Dissolved Solids (TDS) in Product Water: You can
get a free TDS test through some Sears retail stores or service
departments. If the store or service department does not have a
TDS meter, you can send treated and untreated water samples to
a water analysis lab for testing. It is important to test both the
treated and untreated water to determine system performance. If
the TDS is not within the system's performance guidelines,
replace the prefilter, post filter and RO membrane cartridges.
OTHER TROUBLESHOOTING
PROBLEM CORRECTION
Chlorine taste and/or
odor in the RO product
water
Other tasteand/or odor
CAUSE
The ppm ofchlorine inyour water supply
exceeds maximum limits, and has de-
stroyed the RO membrane.
The prefilter isno longer removing chlo-
rine from the water supply.
Postfilter expended.
RO membrane cartridge expended.
Contamination in product water storage.
Water supply to the RO system not within
specifications.
Prafilter or RO membrane cartridges
plugged with sediments.
Ifthe water supply contains more than 2.0 ppm of chlorine, addi-
tional filtering of the water supply to the RO is needed. Correct
this condition before doing maintenance on the RO system.
Replace the prefilter, post filter and RO membrane cartridges,
flow control, and screen.
Replace the post filter cartridge. If taste and odor persists, re-
place the prefilter cartridge, RO membrane cartridge, flow con-
trol, and screen.
Use sanitizing procedures. Replace the post filter cartridge.
System makes product Increasewaterpressura, praconditionthewater, etc., asneeded
water too slowly to conform before doing maintenance on the RO system.
Replace the prefiltercartridge. Ifrate does not increase, replace
the postfilter cartridge, RO membrane cartridge, flow control,
and screen.
System makes lower Storage tank air-charge lees than 5 - 7Open RO faucet and drain tank until flow slows to a drip, Keep
amount of produot water psi. faucet open and check tank pressure. If low, pressurize to 6 psi.
than usual Close faucet to refill the tank.
High tota/ dissolved so/- WatersupplytotheROsystemnotwithin Incraase water prassure, precondition the water, etc., as needed
ids (TDS) in product wa- specifications, to conform before doing maintenance on the RO system.
tar
RO membrane cartridge expended. Replace the prefilter, postfilter and RO membrane cartridges,
flow control, and screen.
Water leaking from fau- Drain side offaucet airgap (3/8" tubing) Inspect and eliminate restriction or plug. Refer to installation
oet airgap hole plugged, restricted, or incorrectly con- instructionsfor proper drain connection.
nected to drain point.
Continual water flow to ;Check valve or automatic shutoff assem- Clean, repair or replace as needed.
drain bly plugged, restrictedor parts worn
Note: Sanitizing is recommended after servicing inner parts of the system(see page 9).
14

- DIMENSIONS and SPECIFICATIONS -
15"
Supply water pressure limits ........................ 40 -125 psi
Supply water temperature limits ..................... 40 - 100 °F
Maximum total dissolved solids (TDS) ............... 2000 ppm
Maximum water hardness @ 6.9 pH ................. 10 gpg
Maximum iron, manganese, hydrogen sulfide ......... 0
Chlorine in water supply (max. ppm) ................ 2.0
Supply water pH limits (pH) ........................ 4 - 10
Product (quality) water, 24 hours _ ................. 5 gal.
Waste water per gallon of product water Q ........... 5 gal.
Percent rejection of TDS, minimum (new membrane) O 90 - 95
Storage tank capacity (max.) ....................... 2.3 gal.
Automatic shutoff control ........................... yes
Metric
280 - 860 kPa
5 - 40°C
18.9 liters
18.9 liters
8.7 liters
_) feed water supply at 50 psi, 77 °F,and 750 TDS Quality water production, amount of waste
water and percent rejection all vary with changes in pressure, temperature and total dissolved solids.
15

- REPAIR PARTS -
Kenmore Reverse Osmosis Drinking Water System, Model No, 625.384700
33
!DRA ,
t ADAPTER
34
!
Bracket!Membrane Housing
PUSH -IN FITrlNGS ]
CO et
24
I
26
1/4" Tubing _ U 35
_10_ _ o-ring seals j3
I"
I
I
21
20
19
1
I
I
I
I
I
.I
5
-9
13
12 10
23
16

Key
NO.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
- REPAIR PARTS -
Kenmore Reverse Osmosis Drinking Water System,
Part
Number
7205350
7207920
7185788
42-34702
7177175
7174965
7207881
7156535
7170246
42-34370
7156577
7171674
7171682
7112442
7112434
7014979
7099296
7112426
7030721
7133838
7208502
7207899
42-34373
7205326
7207938
7208366
7133634
7110385
7116763
7202344
Description of Part
Faucet
Adaptor, 7/16"-24 x 3/8" Tubing
Screw, #10-12 x 5/8" (8 req.)
RO Membrane Cartridge
O-ring Seal, 1-7/8" x 2-1/8"
RO Cap
Elbow, 3/8" NPT x 3/8" Tube (2 req.)
Head (2 req.)
O-ring Seal, 3-3/8" x 3-5/8" (2 req.)
Filter Cart., T & O Postfilter
Sump (2 req.)
Connector, 1/8" NPT x 1/4" Tubing
Elbow, 1/8" NPT x 1/4" Tubing
Valve Top
Valve Center
Plunger
Diaphragm (2 req.)
Valve Bottom
Screw, #10-14 x 1-3/4" (4 req)
Shutoff Assembly []
Tee, 1/4" NPT x 3/8 Tubing
Elbow, 3/8" NPT x 1/4" Tube (2 req)
Filter Cart., Sed.- T & OPrefilter
Storage Tank
Adaptor, 1/4" NPT x 3/8" Tubing
Bracket/Membrane Housing
Check Ball
Spring
O-ring Seal, 7/16" x 5/8"
Check Valve Cap
Model No. 625.384700
Key Part
No. Number
30 7095030
31 7208413
32 7227310
33 7208489
34 7209566
7209574
35 9006062
36 9041700
•42-34334
•7161823
•7161784
•7157280
• 7161750
• 7227271
Description of Part
Cone Screen
Flow (Control) Insert
Tee, Feed Adaptor
Drain Adapter
Push-in Fitting Kit, 1/4" ®®
Push-in Fitting Kit, 3/8" _®
Screw (2 req.)
Hanger Washer (2 req.)
Sump Removal Wrench ®
Tubing, 1/4" x 20' - white [] ®
Tubing, 1/4" x 100' -white [] ®
Tubing, 3/8" x 20' - white [] ®
Tubing, 3/8" x 100' - white [] ®
Owner's Manual
Optional Designer Faucets Available:
• 42-34713 White Faucet
• 42-34714 Black Faucet
• 42-34715 Stainless Faucet
Supplemental Storage Tank:
• ( 42-34707 Storage Tank, 3.2 gallon
[] includes key numbers 14 through 19
[] tubing lengths for remote installations, page 18 (not
included) Direct replacement for colored lengths of
tubing.
• not illustrated
®(_ see page 16 for use locations -Note: This o-ring
and collet are for replacement in the bracket/membrane
housing only. They do not fit the other push-in fittings,
key nos. 2, 7, 12, 13, 21 and 24.
® not included
17

- REMOTE LOCATION FOR REVERSE OSMOSIS SYSTEM -
REMOTE RO INSTALLATION
(storage tank not shown)
Possible remote locations for the RO nearby the kitchen or bathroom sink include; (1) a basement area
underneath the sink, and (2) an adjacent room or closet. Longer lengths of tubing may be needed (see parts
list on page 17).
You can run the drain tubing directly to 1 of several suitable open drain points, as shown below, bypassing
the faucet airgap and p-trap drain. This type of drain is the preferred over the p-trap drain adapter. Check
your local codes. Always be sure to provide an air gap between the end of the hose and the drain point.
RO product
water faucet
3/8" blue tubing
Note: Tubing colors as
supplied with RO system.
OPTIONAL DRAIN POINTS FOR REJECT WATER
red
(
airgap /
STANDPIPE LAUNDRY FLOOR
TUB DRAIN
red
storage
tank
1/4" green tubing
COLD
WATER
SUPPLY
18

19

OWNER'S
MANUAL
MODEL NO.
625,384700
The model number of
your reverse osmosis
system is found on the
rating decal. This decal is
on the top of the bracket.
When requesting service
or ordering parts, always
provide the following in-
formation:
• Product Type
• Model Number
Part Number
Part Description
Reverse Osmosis
Drinking Water System
For the repair or replacement parts you need IIAL__JIIBB IlllJ_
Call 7 am -7 prn, 7 days a week
1-800 -366 -PART
(1 -800 -366 -7278)
For in-home major brand repair service
Call 24 hours aday, 7 days aweek
1-800 -4-REPAIR
(1 - 800 - 473 - 7247)
For the location of a
Sears Repair Service Center in your area
Call 24 hours aday, 7 days a week
1-800 -488 -1222 Ulmll
For information on purchasing a Sears
Maintenance Agreement, or to inquire
about an existing Agreement
Call 9 am - 5 pm, Monday - Saturday
1-827 -- 55800
SEAR;
America's Repair Speciafists
Sears, Roebuck and Co., Hoffman Estates, IL 60179 U.S.A.
part no. 7227271 (01/13/01)