Reverse Osmosis Cartridge Replacement PNRV18ZBB

Reverse Osmosis Cartridge Replacement PNRV18ZBB
Reverse Osmosis Cartridge Replacement
PNRV18ZBB, PNRV18ZBL, PNRV18ZWH and PNRV18ZWW
If the Reverse Osmosis Filtration system is connected to your icemaker YOU MUST turn off the icemaker by raising the feeler arm
before servicing the filter, changing the filters, or purging the filtration system. Three hours after servicing your unit, lower the feeler
arm to resume icemaking.
Be sure you clean your hands with anti-bacterial soap before handling inner parts of the system.
Diagram of Reverse Osmosis Filtration system and hook-up to sink
Prefilter and postfilter cartridge replacement
Cone screen
Reverse
Osmosis
cap
RO produce water faucet
3/8² tubing,
marked FAUCET
1/4² tubing,
marked 1/4² BARB
Water
supply valve
Sink p-trap
Prefilter
cartridge
Green
protective
cap
Reverse Osmosis
cartridge
Bottom end
Postfilter line
Reverse Osmosis housing
Tank shutoff valve
Closed Open
Electronics
box
Clamp retainers (2)
Clamp sections (2)
Postfilter
FLOW
1/4² tubing,
marked
WATER
SUPPLY
UP
End with o-ring
seals downward
Vacuum
relief valve
Drain
line
Flow control
Red tank shutoff valve
Product water tubing
Battery
pack
CLOSED
Leadwires
Shutoff
assembly
Automatic shutoff assembly
2. Relieve the pressure in the Reverse Osmosis system before
continuing. Do this by opening the RO water faucet and
allowing water to run until it stops.
3. Pull the Reverse Osmosis system away from the cabinet, leave
tubing connected. Place a dry towel under the system. Remove
the green protective cap and depress the vacuum relief valve
stem, allowing air to enter the tank. Release the valve stem
AFTER flow from the tank shutoff slows to a slight drip. Replace
the protective cap.
4. Remove the clamp retainers and sections from top of unit.
5. Separate the Reverse Osmosis cap from the Reverse Osmosis
housing (no need to disconnect tubing) and set aside.
7. Dump water from the Reverse Osmosis housing.
8. Sanitize the system.
CAUTION: Before sanitizing, be sure to remove all
cartridges as described above. Chlorine will destroy the
Reverse Osmosis cartridge. Also be sure to isolate the
carbon postfilter as described in 8c.
Connect Reverse
Osmosis water
tubing to tank
shutoff valve
Faucet
& Base
Disconnect
postfilter
NOTE: If the cap o-ring remained in the Reverse Osmosis housing,
replace it on the cap.
6. Lift the Reverse Osmosis cartridge and prefilter cartridge
from the housing. Separate and keep the prefilter cartridge,
but discard the Reverse Osmosis cartridge.
Tank
shutoff
valve
Postfilter
FLOW
1. Turn off water supply to the Reverse Osmosis system by
shutting off the water supply valve.
OPEN
Electronics box
Isolating the carbon postfilter
a. Fill with water to about 1² from the top. Add one
ounce (two tablespoons) of ordinary 5.25% household
chlorine bleach (Hilex, Clorox, etc.) and mix into the
water. DO NOT ADD CHLORINE FIRST. Concentrated,
it will attack plastics.
d. If you are replacing the flow control and screen,
discard them. If you are checking the flow control,
screen and tubing for blockage, clean these parts of
any debris. Do not blow through the flow control. It
will contaminate the part.
b. Replace the Reverse Osmosis cap with o-ring and
install the clamp retainers.
e. Replace the screen by placing the cone end into the
elbow cap and carefully push it in.
c. Close the red tank shutoff valve and connect the
RO faucet product water tubing directly to the tank
shutoff, isolating the carbon postfilter.
CAUTION: Do not force in further after you feel
resistance. Visually check to be sure it is properly
positioned.
d. Open the red tank shutoff valve and the water supply
valve to the Reverse Osmosis system. Open the RO
water faucet, locking the lever upward against the
spout.
f. Install the flow control and tighten by hand, then
another 1/4 turn with pliers. DO NOT OVERTIGHTEN
AND DISTORT OR CRUSH THE TUBING AND FLOW
CONTROL.
e. Allow water to flow through the Reverse Osmosis
system until all bleach odor is gone (approximately
20 minutes).
Lightly lubricate the cap o-ring with clean silicone
grease. Then, push the clamp into position and install the
clamp sections and retainers.
f. Turn off the water supply to the Reverse Osmosis
system. Close the RO water faucet AFTER water flow
stops.
12. Turn on the water supply valve.
g. Close the red tank shutoff valve. Disconnect the
water product line from the red tank shutoff valve
and connect to the electronics box.
9. Slide the new Reverse Osmosis cartridge into the top
of the prefilter cartridge. Then, place the assembled
cartridge into the Reverse Osmosis housing.
NOTE: Be sure the bottom end of the prefilter is at the
bottom, and the UP arrow on the Reverse Osmosis
cartridge points upward (o-ring end downward).
10. Install new screen and flow control.
a. Close the red tank shutoff valve and water supply
valve (turn clockwise), open the RO water faucet.
Drain system until water stops flowing.
b. Locate the flow control and screen. Remove the
straight tubing from the top of the Reverse Osmosis
system, marked “Drain.”
c. Remove the flow control from the end of the tubing
with a clean knife edge. Remove the screen; a
toothpick may be needed for the interior portion of
the cap.
13. Purge the Reverse Osmosis cartridge.
a. Make sure all tubing connections are tightened.
b. Make sure the red tank shutoff valve is open. Turn
on the water supply valve to the Reverse Osmosis
system.
c. In about four hours, pressure will start to build in
the Reverse Osmosis system. At that time, carefully
check all fittings and connections for any water
leaks. Correct leaks, if any are found. Open the RO
faucet to drain the storage tank.
d. Open the RO water faucet until the tank is empty
and flow stops.
e. Close the RO water faucet and repeat steps c and d
three more times.
CAUTION: The Reverse Osmosis cartridge contains
a food grade preservative that should be purged
from the system whenever the RO cartridge is
replaced. The preservative will give product water
an unpleasant taste and odor.
f. After the system has been drained four times it is
ready to make product water for your use.
7189693
215C1001P010-1
49-5835-1
PNRV18
11-97
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