US Water Systems 200-SENTRY-IX, Owner'S Manual

Page: 16 / 24

Installation Instructions
200-SENTRY-IX Water Treatment System
Page 16
Maintenance
The RO system contains filters and membranes which must
be replaced periodically for proper operation.
NOTE: Filter change frequencies may be amended, depending
on source water conditions.
Sanitizing Filter Change Instructions
1. Turn off the feed water to the system and shut-off the
icemaker power and water supply valve (if applicable).
2. Turn on the distribution valve to relive any pressure on
the system and make sure water has stopped flowing
out of the distribution valve.
3. Remove the membrane and all the lower vertical sump
filters The post carbon filter can be left in place at this
time. Use rubber gloves and store the membrane in
water or a Ziploc bag to prevent damage or discard the
membrane if it is being replaced. Remove the DI
cartridges as well.
4. Use the included plastic syringe to collect 5ml of Sani-
System solution from the packet and set aside. Pour
the remainder of the packet of Sani-System directly
into the sediment filter housing (where inlet feed line
attaches). Reattach all filter housings and membrane
caps. Do not install the filters at this time. Remove the
tube that connects to the storage tank from the RO
module and invert it to remove the water from the tube.
If you have a fitting with a nut, disconnect it. If the fitting
is a quick-connect type (push-to-fit) then you just push
in the locking collet and pull the tube out. Inject all of
the Sani-System solution from the plastic syringe into
the line. Reattach tank tube. Make sure RO water
distribution valve is closed and turn on water supply.
5. Allow system to fill with water. The time will vary
depending on the water pressure. However, the system
should be full within 5 – 10 minutes without the filters or
membrane. Allow system to rest for 10 minutes. Open
distribution valve and allow to drain for 10 minutes then
close distribution valve. Allow the system to fill and rest
for another 10 minutes, then open distribution valve
again and allow system to flush for another 10 minutes.
Shut off inlet supply and open distribution valve to
depressurize the system. Remove the sumps and
install the filters and membrane.
6. The white fiber-type filter is installed in the INLET
(sediment) filter sump. Lubricate the o-ring at the top
of the sump with a small amount of the silicone
included. Tighten the filter sump hand tight, then using
the wrench, turn an additional ¼ turn, but do not over
tighten.
7. The carbon block filter(s) are installed into the next
sump (for 3 & 4-Stage) or the next two sumps (for 5-
Stage). Lubricate the O-ring at the top of the sump
with a small amount of the silicone included. Be sure
the rubber gaskets are in place on both sides of the
carbon block filter. Tighten the filter sump hand tight,
then using the wrench, turn an additional ¼ turn, but do
not over tighten.
8. The inline filter is installed on the top of the membrane
(does not apply on 3-Stage systems). The fittings in
each end of the old post filter must be removed and
wrapped with a couple of layers of ½” Teflon tape
around the fitting (when looking at the threaded side of
the fitting, always wrap the Teflon tape in a clockwise
manner). The tee fitting will screw into the inlet side of
the new filter and the elbow fitting to the outlet side.
Re-install the tubing and make sure everything is
sealed.
9. Turn on feed water valve and check for leaks. (Turn off
and correct leaks if leaks occur.)
10. Close the valve on storage tank and open distribution
valve until a steady stream of water flows. Water will be
flowing to the drain as well.
11. Once there is a steady stream of water coming from the
distribution valve (about 1/8” in diameter) close distribution
valve and wait five minutes to see if any leaks result on the
entire system (The initial water from the system may be
discolored. This is normal).
NOTE: BE PATIENT! It is very important that there is a steady
stream (not drips) of water coming from the distribution valve
before it is closed. If not, there could be air trapped in the
system and it will not fill the tank properly. This can waste a lot
of water.
12. If there are no leaks, open the storage tank valve allow the
system to fill. Most systems will be full within 2 hours. The
system is full when the water to the drain stops. Check for
leaks with the system full and repair them accordingly.
Replacement Part
Frequency
Pre-filter (sediment) Every 6-12 months.
Pre-filters (activated carbon) Every 6-12 months.
R/O membrane Every 3-5 years
Post filter (carbon) Every 6-12 months.
DI Filters
As Needed to Main-
tain Quality
UV Light Bulb Every 12 Months