Kenmore ULTRAFILTER 300 625.384720 - Manual (Page 12)

CARE OF YOUR REVERSE OSMOSIS SYSTEM
To keep your reverse osmosis system operating and
producing higli 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.
lliis reverse osmosis system contains a replaceable
treatment component critical for effective removal of
tiital dissolved solids. The monitor faucet feature
provides continuous analysis of the systems perfor­
mance. For systems not equipped with the monitor
faucet function, it is Hghly reci)mmended tlmt you
have your water tested at least every 6 months to
verify your system is per fornung properly Test kits are
available by calling 1-800-826-^53 ext. 47, or check
the water testing section of your local phone directory.
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 cabmet floor when replacing
the prefilter and post filter cartridges and RO mem­
brane.
N'ofe; 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
dose the water supply valve to the RO.
PREFILTER AND POST FILTER
CARTRIDGES
You must replace the prefilter cartridge often to pro­
fed the RO membrane fram being destroyed by chlorine,
and/or from plugging with sediments m 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
cmiridge.
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 with o-ring* seals towards
the top, and with lubricated* o- rings in place, turn to
the right to reattach the sumps.
5. Remove and replace batteries to reset counter and
timer, (monitor models).
’^Note; Use a lubricant approved for use on a potable
water supply.
Problems, Questions? Call 1
12
800
-
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
higlier pH. For example, if supply water^ pH is from 6,8
to 7.7, the cartridge may last for well over one year. Hoxo-
ever, cmiridge 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.
If s time to replace the RO cartridge when the red
LED flashes or the production rate and/ or quality of
product water drops. Product water may begin to
taste different or bad, indicatmg solids and organics
are passing through the RO membrane. To be sure it
is the RO cartridge, replace 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
426-9345 Kenmore Water Line