Stern NARA 3002 Series Product manual

1
NARA  E/P/PE NOBLE  E/P/PE
InstallatIon and maIntenance guIde
ELECTRONIC FLUSH VALVE FOR FLUSH VALVES

1
INDEX
The information in this document reflects products at the date of printing. Stern Engineering Ltd reserves the right, subject to all
applicable laws, at any time, at its sole discretion, and without notice, to discontinue or change the features, designs, materials and other
specications of its products, and to either permanently or temporarily withdraw any of the forgoing from the market. All information in this
document is provided «as is» without warranty of any kind, either expressed or implied, including but not limited to any implied warranties
of merchantability, tness for a particular purpose, or non-infringement. Stern Engineering Ltd assumes no responsibility for errors or
omissions in the information presented in this document. In no event shall Stern Engineering Ltd be liable for any special, incidental, indirect
or consequential damages of any kind, or any damages whatsoever arising out of or in connection with the use or performance of this
information. The tradenames, trademarks, logos and service marks presented in this document, including their design, are the property of
Stern Engineering Ltd or other third parties and you are not permitted to use them without the prior written consent of Stern Engineering Ltd
or such third party as may own them.
1 TECHNICAL DATA
 ABOUT THE SYSTEM  NARA  SERIES
3 PACK CONTENTS  NARA  SERIES
4 ABOUT THE SYSTEM  NOBLE  SERIES
5 PACK CONTENTS  NOBLE  SERIES
 PREINSTALLATION INFO
 INSTALLATION
 ADJUSTING THE SETTINGS WITH A REMOTE CONTROL
14 MAINTENANCE
14 SPARE PARTS LIST
 WARRANTY
 TROUBLE-SHOOTING
TEchNIcal DaTa
With Top Spud Tailpiece
With Rear Spud Tailpiece

2 3
Pack coNTENTs
Familiarize yourself with the part names and conrm that the parts are included:
x Shuto Valve
 x Flush Valve
Vacuum
Breaker
 x Panel Assembly
x Panel Support Frame
 x MX Screw
Allen Key
Optional rear spud
tailpiece
Optional top spud
tailpiece
8 x Screws
Nara 3002E
Nara 3002PE
Nara 3002
Nara 3002P
TransformerBattery box
Nara 3002
Nara 3002 B
 mm tubes
Power Specication V low voltage system
Power supply Nara  / Nara  P: V Battery
Nara  E / Nara  PE: V Transformer
Operating water pressure
.. BAR .. PSI
With water pressure of more than 8 Bars, use
a pressure reducing valve for reduction.
Sensor range  mm default.
abouT ThE sysTEm Nara 3002 sErIEs
Nara is a touch-free electronic flush valve for W.C. operated by a self-adjusting infrared sensor.
The W.C. will start flushing when the user walks away. If the user was present in front of the W.C.
for less than one minute, a reduced flush will take place for removal of liquid waste. If the user was
present in front of the W.C. for one minute or more, a full flush will occur for removal of solid waste.
Nara / E models include a mechanical override push button for alternative manual
operation. Nara  P/PE models include a piezo button for alternative touch operation.
When the manual push button/piezo button is used, the system will discharge a full flush.
NARA  E
NARA  PE
NARA 
NARA  P
Nara 3002 sErIEs

4 5
Power Specication V low voltage system
Power supply Noble  / Noble  P: V Battery
Noble  E / Noble  PE: V Transformer
Operating water pressure
.. BAR .. PSI
With water pressure of more than 8 Bars, use
a pressure reducing valve for reduction.
Sensor range  mm default.
abouT ThE sysTEm
Noble is a touch-free electronic flush valve for W.C. operated by a self-adjusting infrared sensor.
The W.C. will start flushing when the user walks away. If the user was present in front of the W.C.
for less than one minute, a reduced flush will take place for removal of liquid waste. If the user was
present in front of the W.C. for one minute or more, a full flush will occur for removal of solid waste.
Noble / E models include a mechanical override push button for alternative manual
operation. Noble  P/PE models include a piezo button for alternative touch operation.
When the manual push button/piezo button is used, the system will discharge a full flush.
NOBLE 
NOBLE  P




NOBLE  E
NOBLE  PE
NoblE 3032 sErIEs NoblE 3032 sErIEs
Pack coNTENTs
Familiarize yourself with the part names and conrm that the parts are included:
x Shuto Valve
 x Flush Valve
 x Panel Assembly
x Panel Support Frame
Optional rear spud
tailpiece
Optional top spud
tailpiece
8 x Screws x Screws
NoBlE 3032
NoBlE 3032 B
 mm tubes
NoBlE 3032E
NoBlE 3032PE
NoBlE 3032
NoBlE 3032P
TransformerBattery box
Vacuum
Breaker

6 7
PrE-INsTallaTIoN INfo
CHECK CONTENTS
Remove all parts from the packaging and check each part against the Pack Contents
section.
Make sure all parts are accounted for before discarding any packaging material. If
any parts are missing, do not attempt to install the electronic flush valve until you
obtain the missing parts.
WARNINGS
Do not install the system facing a mirror or any other electronic system operated by
an infrared sensor.
To prevent reflection problems, it is recommended to keep a minimum distance of
. meters between the flush valve and other objects.
PREPARATION FOR INSTALLATION
Flush water supply lines thoroughly before installing the flush valve. Do not allow
dirt, thread seal tape or metal particles to enter the flush valve.
All plumbing is to be installed in accordance with applicable codes and regulations.
Important: The entire piping infrastructure from the main big water-supply pipe down
to the W.C. should have a minimun of ” diameter.
sTEP 1 – INsTallINg ThE flush valvE

Cut an adequate opening in
the wall, based on the relevant
schematic above in the Technical
Data section.
Connect the Shuto Valve to the
main water line.
Note: When installing the Shuto Valve, verify that it is being installed in
accordance with the requirements described in the relevant schematics above
in the Technical Data section – to ensure proper positioning of the rest of the
Nara  assembly.
Warning: Supply piping for the Nara  must be securely anchored to the
building structure. This will prevent the unnecessary movement of the Nara
3002 when operated by user.
INsTallaTIoN

8 9
sTEP 1 – INsTallINg ThE flush valvE

Connect the Flush Valve to the
Shuto Valve.
Warning: When connecting the Flush Valve to the Shuto Valve (and for
any further connections from this point of the installation onward), do
not use pipe thread sealant of any type.

For customers who purchased an optional Tailpiece, aer connection
of the Flush Valve install the Tailpiece in accordance with the relevant
schematic above in the Technical Data section.
At this point, the Rough-in portion of the installation is complete.
INsTallaTIoN
sTEP 2 – coNNEcTINg ThE PowEr sourcE

Aer completion of wall and tile
works following the Rough-in por-
tion of the installation, secure the
Panel Support Frame to the wall
using the 8 screws provided.
For Nara  P,  PE and Noble ,  PE versions skip to Step 

Take the open end of the tube (A) and insert it into the quick connector on
the Panel Assembly marked In. Insert the open end of the tube (B) into the
quick connector on the Panel Assembly marked Out.
INsTallaTIoN
In Out
A
B

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INsTallaTIoN
Open the Shuto Valve.

A
B
C
Connect the solenoid connector on the Panel Assembly (A) to the matching
connector on the Flush Valve (C). Then connect the power connector on
the Panel Assembly (B) to the power source (battery box or transformer,
depending on model).
sTEP 2 – coNNEcTINg ThE PowEr sourcE
6
Nara :
Connect the Panel Assembly to
the Panel Support Frame, and
tighten the Allen screw on the
bottom of the Panel Assembly.
Allen screw
Noble :
Connect the Panel Assembly to
the Panel Support Frame, and
screw it to the Panel Assembly
using  screws.
INsTallaTIoN

12 13
sETTINgs aDjusTmENT wITh rEmoTE coNTrol
DETECTION RANGE: If necessary, use the remote control to adjust
the sensor range as follows:
Press the RANGE button. Wait until a quick flashing of the red light
of the sensor eye is perceived. Then, press + to increase one level
and – to reduce it every push will increase or decrease one level.
FLOW TIME: This function determines the water flushing time once
the user leaves the WC.
Press the two waves button. Wait until a quick flashing of the red
light of the sensor eye is perceived. Then, press + to increase the
flow time and – to reduce it.
DELAY IN TIME: If required, the delay in time can be modied as
follows:
Press the IN button. Wait until a quick flashing of the red light of the
sensor eye is perceived. Then, press + to increase the delay in time
and – to reduce it.
DELAY OUT TIME: This button changes the time interval the water
starts to flush aer the user has le the WC.
If required, the delay out time can be modied as follows:
Press the OUT button. Wait until a quick flashing of the red light of
the sensor eye is perceived. Then, press + to increase the delay out
time and – to reduce it.
 HOUR HYGIENE FLUSH: If you have a compatible model with
a  hours hygiene flush it is possible to enable and disable it.
To activate the hygiene flush, press the clock button. Wait until
a quick flashing of the red light of the sensor eye is perceived. Then
press + to activate the hygiene flush or – to deactivate it.
TEMPORARY OFF FUNCTION: This function is ideal to perform any
kind of activity in front of the sensor without operating the system
(for example, cleaning).
Urinals will remain shut for  minute when this button is pressed
once. To cancel this function and to return to normal operation press
the On/O button again or wait  minute.
RESET BUTTON: This function allows the sensor to return to the
original factory preset settings.
If required, press the Reset button and without releasing it, press the
+ button once.
sETTINgs aDjusTmENT wITh rEmoTE coNTrol
ADJUSTING THE SETTINGS WITH THE REMOTE CONTROL
If necessary, the sensor settings can be adjusted as following:
Shut o the water supply. In order to adjust the sensor with the remote control,
hold the remote control straight in front of the sensor in a distance of about ”
(cm). Aer nishing the adjustment, turn the water supply back on.
DETECTION
RANGE
DELAY IN TIME
SECURITY TIME
LOCK OUT TIME
DELAY OUT TIME
TEMPORARY OFF
FUNCTION
RESET

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maINTENaNcE
Care and cleaning of chrome and special nishes
DO NOT use steel wool or cleansing agents containing alcohol, acid, abrasives, or
the like. Use of any prohibited cleaning or maintenance products or substances could
damage the surface of the flush valve. For surface cleaning use ONLY soap and water,
then wipe dry with clean cloth or towel. When cleaning bathroom tile, the flush valve
should be protected from any splattering of harsh cleansers.
If system chemical disinfection is practiced, chlorine can be used (calculated chlorine
concentration of mg/l maximum in water per one hour dwell time) at service interval frequency.
lImITED warraNTy
Y. Stern Engineering Ltd. warrants that its electronic faucets, flush valves and controls
will be free of defects in material and workmanship during normal use for two years
from the date the product is purchased.
If a defect is found in normal use, Y. Stern Engineering Ltd. will, at its discretion, repair,
provide a replacement part or product, or make appropriate adjustments. Damage
caused by accident, misuse, or abuse is not covered by this warranty. Improper care
and cleaning will void the warranty. Proof of purchase (original sales receipt) must be
provided to Stern Engineering Ltd. with all warranty claims.
Stern Engineering Ltd is not responsible for labor charges, installation, or other
incidental or consequential costs other than those noted above. In no event shall the
liability of Stern Engineering Ltd. exceed the purchase price of the faucet, valve or
control.
If you believe that you have a warranty claim, contact your Stern Distributor, Dealer or
Plumbing Contractor. Please be sure to provide all pertinent information regarding your
claim, including a complete description of the problem, the product, model number,
the date the product was purchased, from whom the product was purchased and the
installation date. Also include your original invoice.
Y. STERN ENGINEERING AND/OR SELLER DISCLAIM ANY LIABILITY FOR SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES. This warranty excludes product damage
due to installation error, incorrect maintenance, wear and tear, battery, water
composition, product abuse, or product misuse, whether performed by a contractor,
service company, or the consumer. This warranty does not cover product damage
caused by the following:
- Incorrect installation, inversions of supply pipes.
- Pressures or temperatures exceeding recommended limits.
- Improper manipulation, tampering, bad or lapsed maintenance.
- Foreign bodies, dirt or scale introduced by the water supply.

16 17
TroublEshooTINg
soluTIoNcausEINDIcaTorProblEm
Replace the piston.
The self cleaning needle came out
of the piston orice or is displaced.
The orice delivers more water than
usual pushing down the piston,
causing the piston to close faster
than normal.
Low
Discharge
Replace the U-seal.
The U-seal is torn or damaged and
doesn’t seal well enough.
Flow time setting is too
short.Flow time setting is too short.
Increase the flow time.
Debris or dirt in the Flush Valve clog
up the piston. Friction in the piston
movement causes the piston to
close slower than normal.
High
Discharge
Open the piston cover and
clean the piston and the
orice.
Dirt in the piston orice prevents
enough water from going through
the orice. The reduced flow causes
the piston to close slower than
normal.
Reduce the flow time
setting.Flow time setting is too long.
Clean the piston seat.
Debris or dirt in the piston seat.
Dripping
Replace piston seal.Piston seal is torn or damaged.
Replace or clean the
solenoid valve.
Unscrew the solenoid, pull
out the plunger and the
spring from the solenoid
and clean them. When
placing the plunger and
spring back, please make
sure the spring is in vertical
position.
Debris or dirt in the solenoid valve
orice. The solenoid valve doesn’t
close properly.
TroublEshooTINg
soluTIoNcausEINDIcaTorProblEm
Replace battery.
Low battery.
The red LED indicator
in the sensor flashes
continuously when the
user steps within the
sensor’s range.
Valve does
not flush
Increase or decrease the sensor
range.
Inappropriate sensor range.
The red LED indicator
in the sensor does not
flash (once) when the
user steps within the
sensor’s range.
Replace battery.Battery is completely used up.
Eliminate cause of reflections.
The sensor is picking up reflections
from a mirror or another object.
Connect the connectors of the
electronic unit to the solenoid
valve.
Connectors between the electronic
unit and the solenoid valve are
disconnected.
The red LED indicator
in the sensor flashes
(once) when the
user steps within the
sensor’s range.
Replace or clean the solenoid
valve.
Unscrew the solenoid, pull out
the plunger and the spring from
the solenoid and clean them.
When placing the plunger and
spring back, please make sure
the spring is in vertical position.
Debris or dirt in the solenoid valve
clog up the bleeding hole.
Reduce the water supply pressure.
The water supply pressure is higher
than 8 bars or pressure peaks over
8 bars in the water supply causes
pressure to be trapped in the flush
valve.
Open the piston cover and clean
the piston, the orice and body
internally.
Debris or dirt in the Flush Valve clog
up the piston or the orice. The
piston doesn’t close.
The red LED indicator
in the sensor flashes
(once) when the
user steps within the
sensor’s range.
Continuous
Flow
Replace or clean the solenoid
valve.
Unscrew the solenoid, pull out
the plunger and the spring from
the solenoid and clean them.
When placing the plunger and
spring back, please make sure
the spring is in vertical position.
Debris or dirt in the solenoid valve.
The solenoid valve doesn’t close.

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. 
 Passaic Avenue, Clifton NJ,, USA
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