Water Factory Systems N4000 Series Installation, Operation And Maintenance Manual page 14

G) Turn on feed water and carefully check for
leaks.
III. Replacing RO Membrane Module
The life of the RO membrane depends on local
water chemistry and proper maintenance, e.g., regu-
lar filter changes. Under typical conditions, the RO
membrane life ranges from 18 months to three
years. Unlike filter cartridges, membrane life is not
determined by the amount of water used because of
its self-cleaning feature.
When To Replace The RO Membrane Module
A) 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
replacement may be necessary. If a red or yellow
light is displayed, the faucet should be opened and
the storage tank drained. After it has refilled, check
the system again. If a red or yellow light is still dis
played, the RO membrane module should be
replaced.
B) If a Percent Rejection Monitor is not used, your
dealer or supplier may offer a bi-annual testing
service. NOTE: Recommended maximum mem-
brane
service life is 36 months.
How To Replace The Membrane Module
Replacement of the RO membrane module generally
requires:
• New replacement membrane module of the
same type and specification
• Sanitizing supplier (See Section IV)
• Removal of the purification assembly from its
location
A) Open faucet to drain tank completely and turn off
feed water. Wait five minutes for purification
assembly to completely depressurize.
B) Disconnect tubing from all three connections on
membrane module.
C) Remove RO membrane module from clips and
discard.
D) Position replacement module above clips and
push into place. If necessary, rotate module so
fittings are aligned with respective tubing.
E) Insert each tubing end into respective "Push-In"
connector as far as it will go. (Figs. 6)
F) Follow sanitizing and start-up procedures for the
storage tank and purification assembly outlined in
Section IV.
IV. RO Appliance Sanitization
To assure the highest quality water from your Water
Factor RO drinking water appliance, it is important to
routinely sanitize both the storage tank and the purifi-
cation assembly. NOTE: The following procedures
are intended to be part of a routine maintenance pro-
gram only and not designed to disinfect systems that
have become highly contaminated from misuse.
When To Sanitize The Storage Tank
A) Upon start-up as described in Section N of the
Installation Manual. NOTE: Standard Watery
Factory RO storage tanks incorporate a special
sanitizer which is activated when the storage tank
is initially filled. See Section 6.
B) After any servicing or routine maintenance which
involves the membrane, postfilter(s), tank, or faucet.
When To Sanitize The Purification Assembly:
A) After any servicing or routine maintenance which
involves the prefilter(s) or membrane.
B) After any extended period of non-use (over 30 days).
How To Sanitize The Storage Tank
Sanitizing the storage tank generally requires:
• The Water Factory Tank Sanitizing Unit (P/N
50-
011) or equivalent device such as an empty fil-
ter
housing with fittings and tubing.
• Common household bleach (5.25% - NON
scented)
• Measuring spoon or 0-10 ml graduated cylinder
A) Shut off feed water and open the RO faucet to
empty out any water in the tank (it should feel
"light").
B) Turn off RO faucet and valve at the top of tank.
Disconnect tube to tank. Refer to use of special
"Push-In" connectors (Fig. 6). Remove tank from
its location and drain into sink by turning upside
down and opening valve. Make sure outlet fitting
is pointing away from your face and into the sink.
C) Make sure feedwater is off completely and dis
connect feed tubing from purification assembly.
Connect end of feedwater line to sanitizing device
and tank as show in diagram.
D) Fill the sanitizer device with the following recom-
mended dosage of common household bleach:
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