Stern Engineering NARA Q Product manual

1
INSTALLATION AND MAINTENANCE GUIDE
ELECTRONIC FAUCET FOR URINALS
NARA Q

INDEX
1 TECHNICAL DATA
2-3 PACK CONTENTS
4 PRE-INSTALLATION INFO
5-9 FAUCET INSTALLATION
10-12 SETTINGS ADJUSTMENT
Adjusting the sensor range with a remote control
Adjusting the sensor range
13 BATTERY REPLACEMENT
14 MAINTENANCE
Filters cleaning instructions
Care and cleaning of chrome and special finishes
15 SPARE PARTS
16 LIMITED WARRANTY
17 TROUBLE SHOOTING

1
TECHNICAL DATA
Power Supply: 9V battery or 9V switching transformer
Operating water pressure: 0.5-8.0 bar.
Sensor range: 220 mm. Adjustable
Minimum sensor range: 80 mm
Maximum sensor range: 300 mm
Security time: 90 seconds. Can be reduced with the remote control.
Hot water temperature: Max 70˚C
NARA Q 360510 |NARA QE 360500

2
PACK CONTENTS
1 x Box assembly with
concealed faucet (switching
transformer included in
electronic versions)
Familiarize yourself with the part names and confirm that the parts are included:
1 x Plastic seat
for the cover plate
x Wall cover plate with
electronic unit and spout
(battery box included in
battery versions)
4 x Screws
1 x M4x10 Screw
1 x Mud guard cover
Allen Key

3
PRE–INSTALLATION INFO
CHECK CONTENTS
Separate all parts from packaging and check each part with 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
faucet until you obtain the missing parts.
WARNINGS
Do not install the system facing a mirror or any other electronic system
operated by an infra-red sensor.
To prevent reflection problems, it is recommended keep a minimum
distance of 1.50 meters between the faucet and other objects.
PREPARATION FOR INSTALLATION
Flush water supply lines thoroughly before installing the faucet. Do not
allow dirt, Teflon tape or metal particles to enter the faucet.
All plumbing is to be installed in accordance with applicable codes and
regulations.

4
INSTALLATION
STEP 1 – INSTALLING THE FAUCET
1
2
3
Shut off the water supply.
Cut an adequate opening in the wall
for the dimensions of the box.
Insert the box through the opening.
4Connect the inlet to the water supply.
INLET
OUTLET

5
INSTALLATION
STEP 2 – CONNECTING THE WATER SUPPLY AND THE POWER SOURCE
5
6
Turn on the water supply. Make sure
there is no leakage.
Assemble the mud guard cover to
protect the solenoid valve.
Note the MIN and MAX marks on the
box.
MIN MAX
1
Once the electricity, plumbing and
tile works are finished, cut the mud
guard cover wherever required by
the installation.

6
INSTALLATION
2
3
If your model is Nara Q, assemble the battery into its compartment in the wall cover
plate, close the battery compartment and proceed to clause 8.
4
If your model is Nara QE, detach
the switching transformer from the
faucet box.
Detach the line cover in the box by
unscrewing the line cover screw.
IMPORTANT: CLAUSES 3-7 ARE TO BE EXECUTED BY AN AUTORIZED
ELECTRICIAN ONLY
SWITICHING
TRANSFORMER
LINE
COVER
BATTERY
COMPARTMENT

7
INSTALLATION
5
6
Connect the electricity cable
terminals.
ELECTRICITY CABLE
TERMINALS
Reattach the line cover and fasten
the line cover screw.
LINE
COVER
7Reattach the switiching transformer
into its location in the box.
SWITICHING
TRANSFORMER

8
INSTALLATION
8
9
Assemble the plastic seat for the wall
cover plate using the four screws
provided.
Connect the electronic unit connector that leads to the solenoid valve to the
solenoid connector.
For Nara QE models only: Connect the other electronic unit connector to the
switching transformer connector.
NARA QE
Assemble the panel to the cover seat
and tighten it with the top screw.
10

9
INSTALLATION
12
11
Now, remove the protecting sticker
that covers the sensor.
Make sure that the 6mm water outlet
pipe is inserted into the faucet spout
located in the panel.
IMPORTANT: WAIT A FEW SECONDS BEFORE ACTIVATING THE
FAUCET TO AVOID ENTERING INTO “ADJUSTING MODE”.
IF THE RANGE IS UNSATISFACTORY, REFER TO THE SECTION
ENTITLED “SETTINGS ADJUSTMENT”

10
SETTINGS ADJUSTMENT
WITH REMOTE CONTROL
TEMPORARY OFF FUNCTION
DELAY IN TIME
DETECTION RANGE DELAY OUT TIME
RESET
SECURITY TIME
Adjusting the settings with the remote control
If necessary, the sensor settings can be adjusted as following:
Shut off 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 6-8”
(15-20cm). Choose the function you want to adjust by pressing once on one of the
function buttons. After pressing once on a specific function button, a quick flashing
of the red light at the front of the sensor will occur. At this stage, you can change the
setting by pressing the (+) or the (-) buttons, every push will increase or decrease
one level. After finishing the adjustment, turn the water supply back on.
DETECTION RANGE: The sensor range is the greatest
distance that an object can be away from the sensor to
activate the faucet. The sensor is factory preset.
To adjust the sensor range press + to increase detection
range and – to decrease the detection range of the
sensor.

11
SETTINGS ADJUSTMENT
WITH REMOTE CONTROL
SECURITY TIME:The Security time, prevents continuous
flushing of water due to reflections or vandalism. By default,
if the sensor is covered for more than 90 seconds the water
flow will shut automatically. To resume regular operation
any obstruction must be removed.
Press the SEC button. Wait until a quick flashing of the
red light of the sensor eye is perceived. Then, press + to
increase the security time and – to reduce it.
DELAY IN TIME:It is recommended to change the delay in
time for flush valves for urinals or toilets only.
If required, the delay in time can be modified also in faucets
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 allows modifying the water
flow time after the user removes his hands from the
faucet. A delay out time close to 0 will save more water.
An increased delay out time will make the user experience
more comfortable.
If required, the delay out time can be modified 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.
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).
Faucets will remain shut for 1 minute when this button is
pressed once. To cancel this function and to return to normal
operation press the On/Off button again or wait 1 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.

12
RANGE ADJUSTMENT
The sensor range is the range an object can be away from the sensor in order to activate
the faucet. The sensor is factory preset. If necessary, it can be adjusted as follows:
Adjusting the sensor range manually:
1. Disconnect the battery or switch off the electricity supply to the sensor.
2. For Nara Q, make a short circuit between the (+) and the (-) connections of the sensor. A
screw driver or any conductive material can be used to make this short circuit. Alternatively
and for Nara QE, activate the sensor three or four times after disconnecting the power
supply.
Do not make a short circuit on the power supply or on the sensor when the power supply
is connected to the sensor.
3. Reconnect the power supply to the sensor.
4. To enter into the adjusting mode, put your hand in
front of the sensor at a distance of 2 “(5cm) within
5 seconds from the re-connection of the power
supply.
Note: If you will not put your hand in front of the
sensor after connecting the power supply, the
sensor will not enter into the adjusting mode and
the previous adjustment will continue.
5. When the sensor enters into the adjusting mode
and your hand is in front of the sensor, the red light
in front of the sensor will flash slowly.
6. Keep your hand in front of the sensor until the slow flashing changes to quick flashing,
At this point move your hand to the required distance from the sensor and wait until the red
light will stop flashing.
7. When the red light has turned off, the sensor is adjusted to the required distance.
8. Check the distance you have set and if it is not satisfactory, repeat the procedure.

13
BATTERY REPLACEMENT
2
3
Battery replacement instructions – Nara Q only
When the battery weakens, the red indicator light will blink at a constant rate. The battery
must be replaced within two weeks.
To replace the battery:
4
Release the screw at the top of the
cover plate and remove the cover
plate.
Replace the used battery with a
new 9V battery (Lithium battery is
recommended).
Open the battery compartment located
at the back of the cover plate.
1
Close the battery compartment and
refit the cover plate
BATTERY
COMPARTMENT

14
MAINTENANCE
Filter cleaning instructions
This faucet is provided with one stainless steel filter preventing foreign
particles to enter the lines. If the water flow has decreased, this can be
because the filter is clogged. The filter can be cleaned as follows:
1. Shut-off the water shut off valve (angle valve).
2. The filter is located between the solenoid housing and the shut off
valve nut.
3. Remove the filter and wash it under running water.
4. Reassemble the parts.
5. Make sure that there is no water leakage.
Care and cleaning of chrome and special finishes
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 faucet. For
surface cleaning of faucet use ONLY soap and water, then wipe dry with
clean cloth or towel. When cleaning bathroom tile, the faucets should be
protected from any splattering of harsh cleansers.

15
SPARE PARTS LIST
Panel Kit ............................................................................................. 07040108
Sensor Kit........................................................................................... 07220232
Solenoid & Housing Kit..................................................................... 07231010
Filter.................................................................................................... 08530013
Switching transformer...................................................................... 06522062

16
LIMITED WARANTY
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.

17
TROUBLE SHOOTING
PROBLEM INDICATOR CAUSE SOLUTION
No water
coming out of
the faucet:
1.Sensor flashes
continuously when
user’s hands are within
the sensor’s range.
Low battery. Replace battery.
2. Red light in the
sensor does not flash
once when user’s
hands are within the
sensor’s range.
1. Range is too short. Increase the range.
2. Range is too long. Decrease the range.
3. Battery is completely used up The battery must be replaced.
4. Unit is in “Security Mode”*
5. Sensor is picking up reflections from the
washbasin or another object.
Eliminate cause of reflection.
3. Red light in the
sensor flashes once
when user’s hands
are within the sensor’s
range.
1. Connectors between the electronic unit
and solenoid are disconnected.
Connect the electronic unit
connectors to the solenoid.
2. Debris or scale in solenoid. Unscrew solenoid, pull out the
plunger and the spring from the
solenoid and clean them. Use
scale remover material if needed.
When replacing the plunger,
please make sure that the spring
is in vertical position.
3. The central orifice in the diaphragm is
plugged or the diaphragm is torn
Clean the orifice or replace
diaphragm.
4. The water supply pressure is higher
than 8 bar.
Reduce the supply water
pressure.
5. The water supply pressure is under 8 bars
and yet the pressure in the faucet’s body
is higher. This situation could be caused
by a sudden increase in the water supply
pressure that the backcheck prevents from
dropping, even after water supply pressure
drops under 8 bars.
Shut off water supply and
unscrew one of the flexible pipes
in order to reduce the pressure
that blocks the product.
Water flow
from spout
does not stop:
1. Sensor flashes once
when user’s hands
are within the sensor’s
range.
Debris or scale in diaphragm Clean the orifice or replace
diaphragm.
2. Red light in the
sensor does not flash
once when user’s
hands are within the
sensor’s range.
1. Sensor is dirty or covered.** Clean or eliminate case of
interference.
2. Sensor is picking up reflections from the
washbasin or another object.
1. Decrease the range or
eliminate cause of reflection.
Water flow
diminished
Filter or aerator is clogged Remove, clean, re-install
* “Security Mode”: If the sensor is covered for more than 90 sec. the faucet will automatically shut off
water flow. To return to normal operation remove any blockage.
** In this case, the water flow will stop anyway after 90 seconds because of the security time.

18
15 Gan Rave Blvd., 81222 Gan Rave, Yavne, Israel
Tel: [phone], Fax: [phone], [email protected]
www.sternfaucets.com
09.13 01500437