Cuno SQC Series - Manual (Page 15)

When to Replace the RO Membrane Cartridge
•
As determined by a built-in percent rejection (PR) monitor:
The monitor is factory preset so that a green light will be
displayed when the water quality is good, and a red or
yellow light indicates that cartridge replacement may be
necessary. If a red or yellow light is displayed, the faucet
should be opened and the storage tank trained. After it
has refilled, check the water quality again. If a red or
yellow light is still displayed, the membrane should be
replaced.
• If a PR monitor is not used, your dealer or supplier will
offer a bi-annual testing service.
How to Replace the RO Membrane Cartridge
1)
Close the feed water tapping valve. Lift up on the faucet
handle to drain the tank. Wait five (5) minutes for the
purification assembly to completely depressurize.
2) Make sure that there is some slack in the red SFC tubing
connected to the fitting at the bottom of the RO membrane
cartridge. Twist the cartridge 1/4 turn clockwise so that
the tubing connection is accessible. (See Fig. 8)
3) Remove the red SFC tubing by depressing the small gray
collet and pulling the tubing away from the fitting.
Note: It is advisable to check the end of the red SFC tubing
for nicks or scratches. If any are observed, cut off 1/4" from
the end of the tubing with a sharp razor knife.
4) Firmly pull the cartridge away from the head. (It may be
necessary to twist the cartridge slightly from side to side.)
5) Remove the new RO membrane cartridge from its sanitary
sealed wrapper. (Double check to see that it is the correct
replacement by comparing the labels.) Rinse it with tap
water and dry it off.
6) Remove the white plug from the fitting at the bottom of the
cartridge by pushing in the small gray collet and pulling out
the plug.
7) Remove the red plastic cap from the top of the cartridge.
8) Using tap water, food grade silicone lubricant or glycerin,
wet the O-ring seals to make cartridge insertion easier.
9) Reconnect the red SFC reject tubing by inserting it into the
fitting at the bottom of the new RO membrane cartridge as far
as it will go. Line up the cartridge ears, insert the cartridge
and push it into the head until it is fully seated. Twist the
cartridge 1/4 turn counterclockwise to lock it into place.
10) Open the feed water tapping valve and carefully check for
leaks. Carefully inspect the fitting at the bottom of the new
RO membrane cartridge.
11) Follow the sanitizing procedure for the storage tank and
the purification assembly outlined below.
D. SANITIZING THE RO APPLIANCE
To assure the highest quality water from your Water Factory
Systems RO Drinking Water Appliance, it is important to routine-
ly sanitize both the storage tank and the purification assembly.
IMPORTANT: These procedures are only intended to be
part of a routine maintenance program only and are not
designed to sanitize systems that have become highly
contaminated from misuse.
When to Sanitize the Storage Tank
•
Upon start-up as described in the beginning of this manual.
• After any servicing or routine maintenance which involves
the RO membrane cartridge, postfilter cartridge(s), storage
tank, or faucet.
When to Sanitize the Purification Assembly
•
After any servicing or routine maintenance which involves
the prefilter cartridge or the RO membrane cartridge.
• After any extended period of non-use (over 30 days) unless
the cartridges are stored inside a sealed plastic bag in the
refrigerator.
How to Sanitize the Storage Tank
Sanitizing the storage tank generally requires:
•
The Water Factory Tank Sanitizing Unit (P/N 50-011) or an
equivalent device such as an empty filter housing with
fittings and tubing.
• Common household bleach (5.25% non-scented).
• A measuring spoon or a 0-10 ml graduated cylinder.
Remove the red SFC tubing from
the fitting before completely
removing the RO membrane cartridge
(1) Prefilter Sed/Carbon
(2) Membrane
(3) Postfilter/Carbon
ON
OFF
1
2
3
Fig. 8
14