Kenmore ULTRAFILTER 150 625.385700 Owner's Manual page 11

- 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.
CA UTION: Be sure to remove the RO membrane and
both filter cartridges as follows, before sanitizing.
Chlorine will destroy the RO membrane cartridge.
1. Be sure the water supply to the RO is turned off,
and the RO faucet is open to relieve pressure.
2. Referring to Figure 12, page 14, remove the R©
membrane sump by twisting 1/4 turn left (_D). Re-
move the R© cartridge from sump. Place the car-
tridge in a clean plastic bag.
3. Be sure the o-ring seal is on the sump. Replace the
RO sump by turning to the right (k,) 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 by turning to the right
(k_) to lock.
5. Remove the prefilter 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...Hilex, 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 turn to the right (k_) to lock.
8. Slowly open the water supply to the RO.
9. Open the R© faucet by turning knob to the left.
10. Allow water to circulate through the R© system
until you smell the bleach odor at the faucet. Then
close the faucet and allow the R© to stand idle for 20
minutes.
11. After the 20 minutes open the R© faucet and run
water until the bleach odor is gone.
12. Turn off the water supply to the R©.
13. Be sure your hands are clean. Then, repeat steps
1 - 5 and 7, only replace all cartridges.
Important: Refer to Figure 12, page 14, and to page 15
when replacing cartridges. The prefilter (left side)
cartridge and the postfilter (right side) have puple
end caps.
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 2 hours, 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 pmxing instructions: The RO cartridge
contains a food _ade preservative that should be rinsed
before using water from the system. The preserva-
tive will give product water an unpleasant taste and
odor.
1. Allow the storage tank to fill for about 4 hours.
Then open the R© faucet until the tank is empty and
flow stops. Close the RO faucet.
2. Repeat step 1 five more times (for a total of 6) to
purge the RO system. Then the RO system is ready
to make product water for use.
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Problems, Questions? Call 1-800-426-9345 Kenmore Water Line