Water Factory Systems N4000 Series Installation, Operation And Maintenance Manual Download Page 7

C)

Connect yellow 1/4” tubing from purification

assembly to storage tank.

D)

Route special red “SFC” tube from purification

assembly module (factory made connection) toward
faucet. Do not cut this special SFC tube. Its length is
important to maintain proper efficiency and perform-
ance. 

E)

Cut the standard green 1/4” tubing from faucet air

gap and connect to 1/4” coupling fitting on the end of
“SFC” tube. 

M. Install Icemaker Hookup (optional)

The RO drinking water appliance can be

connected to any standard refrigerator icemaker or
icemaker/water dispenser. It should never be con-
nected to a commercial type bar icemaker.

Hooking up an icemaker involves connecting a

tee with shut off valve into the blue 3/8” faucet tubing
and routing tubing over to the refrigerator. Hooking up
to existing copper tubing is generally not recommended
unless it is less than 6 months old. If copper tubing
must be used, then installation open in-line carbon filter
at the refrigerator connection is recommended.

Before turning off the existing tap water sup-

ply to a refrigerator icemaker, always shut off the
icemaker first (usually by lifting the lever arm above
the bin to the uppermost position). The icemaker
should only be turned on again after the RO system
has been drained several times and the tank has a
full supply of water.

NOTE:

Contact the factory for the availability of spe-

cial icemaker hook-up kit.

IMPORTANT:  Before any service is performed
on the RO system, always turn off icemaker
valve and the icemaker unit.  Only turn on when
system is operating and tank is full.

N. Start Up The System

A)

Double-check that all connections are secure.

B)

Turn on feed water valve and check for leaks.  If

any leaks are noted, turn off valve and correct
before proceeding.  NOTE:  If a leak occurs at
"Push In" plastic fitting refer to figure 6.

C) 

Turn on storage tank valve and open faucet until

a steady stream of water flows.  Close faucet, wait
at least 5 minutes and carefully check for leaks.
Correct as necessary.

NOTE:

When the system is first turned on, water

may intermittently "spurt" from the air gap module.

This is perfectly normal and is caused by air trapped
in the system.  This will usually disappear within a
short time.

O. Flush System of Preservative and Check
Operation

A)

Lift faucet handle and allow tank to drain com-

pletely of sanitizing solution.  Do not use this water.
When tank is empty, the faucet will steadily drip.
This is the rate water is processed by the RO sys-
tem.

B)

With faucet handle in "up" position, measure the

rate of the steady drip from spout.  Use a graduated
cylinder (in milliliters) and a watch with a second
hand to calculate approximate production in gallons
per day (milliliters per minute X 0.38 = gpd).
Proceed to check reject flow rate by disconnecting
tubing at drain connection and measure as per
above.  The ratio should be a minimum of 2.5
(reject) to 1 (product).

C)

Close faucet and reinspect system for leaks.

Instruct customer (or use special faucet tag sup-
plied) to wait at least 4 hours and drain tank again.
The water should be discarded as it may contain
some preservative/disinfectant solution.

D)

System should be ready to use\as soon as the

tank refills.  If any objectionable taste is noticed after
second tank draining, instruct customer to wait and
drain tank the following day.  Only at this time
should an icemaker be turned on if one is connected
to the system.

NOTE: 

If optional percent rejection monitor is used

and yellow light indicates service is required, several
tankfuls of water may have to be used to completely
flush excess TDS from the new carbon postfilter
before a green light will show.

P. Clean Up, Paperwork And Customer
Orientation

A)

Clean up the work thoroughly.   This is important

in leaving a good final impression with the customer.

B)

Affix any special decals or stickers.  Fill out the

warranty card.  Be sure to record the house pres-
sure and TDS for your service files.

7

Summary of Contents for N4000 Series

Page 1: ...allation Operation and Maintenance Manual WATER FACTORY SYSTEMS N4000 N4500 N5000 Reverse Osmosis RO Drinking Water Appliance CUNO Incorporated 400 Research Parkway Meriden CT 06450 Tele 203 237 5541...

Page 2: ...nside Make sure to flush it thoroughly as directed before first use Table Of Contents Installation Instructions A Determine the appliance location B Prepare the area for installation C Prepare the app...

Page 3: ...and remove compo nents Check that all installation parts are present which includes the purification assembly storage tank faucet installation hardware and tubing Check that the air supply in the empt...

Page 4: ...the condition of the drain piping espe cially in older homes where the traps and tail pieces can be deceptively thin and frail If in poor condition it is wise to inform the customer that the conditio...

Page 5: ...air gap module Plumber s putty It is important to understand what is involved in this procedure First the glassy layer of porcelain must be penetrated through to the base metal Second a center disc o...

Page 6: ...usually mounted to the right or left sink cabinet sidewall taking into consideration the space available and the tank loca tion Generally the tank is placed in the rear of the sink cabinet while the...

Page 7: ...faucet until a steady stream of water flows Close faucet wait at least 5 minutes and carefully check for leaks Correct as necessary NOTE When the system is first turned on water may intermittently sp...

Page 8: ...er and hex nut onto the threaded nipple Hand tighten hex nut until faucet feels snug E After rechecking faucet orientation tighten hex nut 9 16 wrench or deep socket until faucet feels secure NOTE Fla...

Page 9: ...ion and slide faucet handle forward over spout hole to gain access to faucet valve Unscrew the tee bar and slotted bushing to remove valve Clean out obstruction or replace with new valve mechanism as...

Page 10: ...pipe farther from Properly plug original hole Caution Make sure drain saddle is always installed above before the the trap Fig 4 10 General Basement Installation Schematic Fig 2 Faucet with Air Gap 1...

Page 11: ...n Saddle Elbow Drain Saddle Mount drain saddle at either location Hole should be located on top of the pipe NOTE Some state and local plumbing codes may prohibit the use of saddle type valves and or d...

Page 12: ...tubing selected for use with these connectors be of high quality exact size and roundness and with no surface nicks or scratches If it is necessary to cut the tubing use a plastic tubing cutter or sh...

Page 13: ...only yearly replacement C Recommended maximum sediment prefilter service life is one year When To Replace Carbon Prefilter 4500 and 5000 Series Only The carbon prefilter removes free chlorine from th...

Page 14: ...low 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...

Page 15: ...he Purification Assembly Sanitizing the purification assembly generally requires New prefilter cartridge s and filter housing O ring s Water Factory filter wrench or equivalent Common household bleach...

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