Stern D28 Series Product manual

11
INSTALLATION AND MAINTENANCE GUIDE
D28 series
WALL MOUNTED ELECTRONIC FAUCET
FOR COLD OR PREMIXED WATER
D |DE |D DUAL POWER B
D DUAL POWER E |D BOX |D E BOX

TECHNICAL DATA
 
 TECHNICAL DATA
 PACK CONTENTS
 PRE-INSTALLATION INFO
 FAUCET INSTALLATION
 SETTINGS ADJUSTMENT
 MAINTENANCE
Filters cleaning instructions
Care and cleaning of chrome and special nishes
 BATTERY REPLACEMENT
 SPARE PARTS LIST
 TROUBLESHOOTING
 LIMITED WARRANTY
iNDeX TechNical DaTa
Power supply
D model -
X.V batteries
D Box B model - V Lithium battery
D Dual Power B model -V Alkaline battery
DE models - V transformer
Recommended water
pressure
.. bar ( PSI) With water pressure of more than
8 bars, use a pressure reducing valve for reduction.
Preset sensor range Self-adjusting sensor
Minimum sensor range mm / .”
Maximum sensor
range mm / .”
Security time  seconds. Can be reduced with optional
remote control.
Hot water temperature Max °C
D
DE
 D DUAL POWER B
 D DUAL POWER E
 D BOX B
 D BOX E
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.

 
 x Spout and attachments
(incl. electronic unit)
M  x  set screw
x D base  x Wall rosette
x Solenoid housing kit with
inlet nipple and lter
 x Spout and attachments
(incl. electronic unit)
M  x  set screw
x Wall rosette
 x D base
x Corrugated Tube
 x Dual power
input box with
inlet nipple and
lter
b VERSIONS
E VERSIONS
 x Dual power
input box with
inlet nipple and
lter
 x V Transformer
E VERSIONSB VERSIONS
V transformer
Battery box for
6 x .V batteries
Pack coNTeNTs Pack coNTeNTs
D28 | D28 e D28 Dual Power B
D28 Dual Power e

 
Check contents
Separate all parts from the packaging and check each part with the pack contents
section. Pay attention to the variations of the dierent models.
Make sure all parts are accounted for before discarding any packaging material.
If any parts are missing, do not attempt to install your electronic faucet until you
obtain the missing parts.
. Keep a distance of more
than  mm. between the
sink and the spout.
To avoid reflection problems
. Do not place a shiny
pop up in front of the
sensor.
XBox assembly with
concealed solenoid valve XMud guard cover
 X Spout and attachments
(incl. electronic unit)
M  X  set screw
 X D base  X Wall rosette
 X Panel
Screw M  X 
 X Corrugated
Tube
Pack coNTeNTs D28 BoX
b VERSIONS E VERSIONS
V Transformer
V Battery
Box
Pre-iNsTallaTioN iNfo
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. Shut o water supply.
Important
Allplumbing isto be installed in accordance with applicable codes and regulations.
Warning
To avoid reflection problems keep a distance of more than  mm. between the
sink and the spout.

 
sTeP 1 - iNsTalliNg The fauceT
. Shut o the water supply
. Drill a hole ( to  mm) at the place where you want to install the faucet spout.
. Your model includes an optional anti-rotation pin. Drill a small hole just above the
previous one for the anti-rotation pin.
. Insert the faucet and its attachments through the wall. The aerator in the faucet
spout must face the washbasin.
. Insert the anti-rotation pin into the small hole (if needed)
. Fix the base behind the wall with the hexagonal nut and the disk.
sTeP 2 - coNNecTiNg The waTer suPPly
. Fit the flexible pipe coming from the faucet
base to the solenoid valve housing.
. Fit the water supply inlet to the inlet nipple at
the solenoid valve housing.
Note: Make sure the lter is located at the
solenoid inlet.
. Connect the cable coming from the electronic
unit to the solenoid valve.
Important: The faucet was supplied with a self
adjusting sensor. The ideal sensor range for the
specic location will be set automatically.
iNsTallaTioNiNsTallaTioN D28 | D28 eD28 | D28 e
Before proceeding to step  check that no
objects are in front of the sensor besides
the washbasin.
Now, remove the protecting sticker that
covers the sensor.
sTeP 3 – coNNecTiNg The Power source
. For D: Connect the other cable coming from the electronic unit at the D base
to the battery box.
. For D E: Connect the other cable coming from the electronic unit at the D base
to the transformer. Plug the transformer into the electricity socket.
. Aer you have connected the power source
(battery or transformer) wait  seconds in
order to allow the system to set the ideal
sensor range. As an indication that the self
adjusting is taking place, a LED in the sensor
eye will flash continuously. The solenoid
valve will be opened and closed for
 second as an indication that the ideal
sensor range was set and the product is
ready for use.
. Turn on the central water supply. Check for leaks.
. If the automatically adjusted sensor range is not satisfactory, please refer to the
section entitled “Settings adjustment”.

 
OPERATION:
This faucet features an IP dual power input box. The product can be operated with a
V battery or a V transformer. In addition, when used with a transformer, the product
contains an integrated battery back up, for normal use during power supply failures.
sTeP 1 - iNsTalliNg The fauceT
. Shut o the water supply
. Cut an adequate opening in the wall for the dimensions of the faucet base (where
you want to install the spout), and the corrugated tube.
. Install the D dual power base and its attachments through the opening
that was cut in the wall.
4. Aer you have connected the power source (battery or
transformer) wait  seconds in order to allow the system
to set the ideal sensor range. As an indication that the self
adjusting is taking place, a LED in the sensor eye will flash
continuously. The solenoid valve will be opened and closed
for  second as an indication that the ideal sensor range was
set and the product is ready for use.
5. Assemble the temporary protective faucet base cover.
(See FIG.)
6. Make sure the corrugated tube stays outside the wall when
tiling.
7. Once the works on electricity, plumbing and tiles is nished,
insert the wall rosette through the faucet base.
8. Cut the temporary faucet base cover.
9. Pull the four way connector out of the faucet base, and lead it
along with the flexible tube, through the corrugated tube.
10. Connect the flexible tube to the solenoid valve body
integrated in the dual power input box. (See FIG.)
11. Connect the water tube coming from the faucet body to the
nut at the top of the dual power input box, by snapping it in.
12. Fix the faucet spout by inserting the nipple into the faucet
base and tighten the screw.
D28 Dual Power B
D28 Dual Power e
D28 Dual Power B
D28 Dual Power e
sTeP2 – coNNecTiNg The Power source
Check that no objects are in front of the
sensor besides the washbasin.
Now, remove the protective sticker that
covers the sensor.
. If your model is D Dual Power B open the dual power box using the Allen key
provided and install the V Alkaline battery.
. Connect the four contacts connector to the dual power input box.
Important: Make sure that the  contacts connector is connected all the way through.
. Aer you have connected the four contacts connector to the dual power input box,
wait  seconds in order to allow the system to set the ideal sensor range.
As an indication that the self adjusting has taken place, a LED in the sensor
eye will flash continuously. The solenoid valve will open and close for  second as
an indication that the ideal sensor range was set and the product is ready for use.
sTeP 3 – coNNecTiNg The waTer suPPly
. Turn on the central water supply.
. Check for leaks.
. If the automatically adjusted sensor range is not satisfactory, please refer to the
section entitled “Settings adjustment”.
iNsTallaTioN iNsTallaTioN

 
sTeP 1 - iNsTalliNg The fauceT
. Shut o the water supply
. Cut an adequate opening in the wall for the dimensions of
the D box, the corrugated tube, the rigid pipe and the
D base (where you want to install the spout).
. Insert the D box to the opening that was cut in the wall.
Connect the water supply pipe to the nipple at the bottom
of the D box.
4. Mount the D base to the opening cut in the wall and make
sure that the spout is at a 90 degree angle with the wall.
Important: The D base should be installed so that the
outside surface of the nished wall falls between the
minimum and maximum lines marked at the base.
5. Assemble the rigid pipe (not supplied) from the nipple at the
box to the inlet at the D base.
6. Assemble the corrugated tube between the D base and
the box, and lead the connectors through the D base and
through the D box. Assemble the mud guard cover to
protect the D box.
7. Assemble the temporary protective D28 base cover.
(See FIG.)
8. Once the works on electricity, plumbing and tiles have been
nished, insert the wall rosette through the D base.
9. Cut the temporary D base cover and the mud guard cover
wherever required by the installation.
10. Connect the electronic unit connector coming from the
corrugated tube to the solenoid valve connector at the D28
box.
11. If your model is D28 Box E, connect the power supply
connector coming from the corrugated tube at the D base
to the transformer. (See FIG.)
12. Connect the solenoid valve cable and the power supply cable
from the spout to those at the D base.
13. Fix the D spout by inserting the nipple into the D base.
Make sure that this area is clean before proceeding. Secure
the screw with the Allen key.
sTeP2 – coNNecTiNg The Power source
. Remove the temporary protective cover panel.
Important: D is supplied with a self adjusting sensor. The ideal sensor range for
the specic location will be set automatically.
Check that no objects are in front of the
sensor besides the washbasin.
Now, remove the protective sticker that
covers the sensor.
. If your model is D B Box the battery box is attached to the cover panel. Connect the
other electronic unit connector coming from the corrugated tube to the battery box
.
If your model is D E Box, plug the transformer into the electricity socket.
. Aer you have connected the power source (battery or transformer) wait 
seconds in order to allow the system to set the ideal sensor range. As an
indication that the self adjusting is taking place, a LED in the sensor eye will flash
continuously. The solenoid valve will be opened and closed for  second as an
indication that the ideal sensor range was set and the product is ready for use.
sTeP 3 – coNNecTiNg The waTer suPPly
. Turn on the central water supply.
. Check for leaks.
. Assemble the wall cover panel by screwing the four screws.
. If the automatically adjusted sensor range is not satisfactory, please refer to the
section entitled “Settings adjustment”.
D28 BoX D28 BoX
iNsTallaTioN iNsTallaTioN

 
seTTiNgs aDjusTmeNT seTTiNgs aDjusTmeNT
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 6-8” (cm).
Choose the function you want to adjust by pressing once on one of the function buttons.
Aer pressing once on a specic function button, a quick flashing of the LED 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. Aer nishing the
adjustment, turn the water supply back on.
DETECTION
RANGE
DELAY IN TIME
SECURITY TIME
COMFORT FLUSH
DELAY OUT TIME
TEMPORARY OFF
FUNCTION
RESET
SELF ADJUSTMENT
MODE
HYGIENE FLUSH
DETECTION RANGE: This faucet was supplied with a self
adjusting sensor. The ideal detection range for the specic
location will be set automatically.
Only if necessary, use the remote control to adjust the sensor
range as follows:
Press the RANGE button. Wait until a quick flashing of the LED in
the sensor eye is perceived. Then, press + to increase the range
and – to reduce it. Every push will increase or decrease one level.
Note: Once you have changed the detection range with the remote control, the
distance will be remembered by the sensor, even if the power source is disconnected.
To get back to the self adjustment mode, use the ADJ button only.
ENTRANCE TO THE SELF ADJUSTMENT MODE: Check that no
objects are in front of the sensor. Press the ADJ button. Once a
quick flashing of the LED of the sensor eye is perceived, remove
your hand holding the remote control and move away from the
sensor area. The ideal sensor range for the specic location will
be set automatically. Once the self adjustment has taken place,
the solenoid valve will be opened and closed for second as an
indication that the ideal sensor range was set and the product
is ready for use.
SECURITY TIME: The Security time, prevents continuous running
of water due to reflections or vandalism. By default, if the sensor
is covered for more than  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 LED in the
sensor eye is perceived. Then, press + to increase the security
time and – to reduce it.

 
maiNTeNaNce
Care and cleaning of chrome and special nishes.
DO NOT use steel wool or cleansing agents containing alcohol, acid, abrasives, and
alike. Use of any prohibited cleaning or maintenance products or substances could
damage the surface of the soap dispenser or faucet.
For surface cleaning use ONLY soap and water, then wipe dry with a clean cloth or
towel.
When cleaning bathroom tiles, the soap dispenser should be protected from any
splattering of harsh cleansers.
Filter cleaning instructions
This faucet is provided with a stainless steel lter preventing foreign particles to enter
the lines. If the water flow has decreased, this may be because the lter is clogged. The
lter can be cleaned as follows:
. For D, DE, D DPB and D DPE:
a. Shut-o the water shut o valve.
b. Disconnect the water supply pipe from the adaptor and disassemble the lter
from it.
c. Wash the lter under running water.
d. Reassemble the parts and restore the incoming water supply.
e. Make sure that there is no water leakage.
. For D Box, D Box E:
a. Release the screws at the panel and remove it. Turn o the regulating valve.
b. Disassemble the solenoid valve by opening the nuts.
c. Remove the lter and wash it under running water.
d. Reassemble the lter and the solenoid valve.
f. Turn on the regulating valve and adjust the flow capacity.
g. Make sure that there is no water leakage. Re-assemble the wall cover panel.
Solenoid valve servicing
The solenoid valve diaphragm requires periodical cleaning every six (6) month.
Remove the diaphragm from the solenoid valve and examine it for dirt. in case it is dirty
or clogged, wash it under running water and reassemble it.
Do not attempt to dismantle the solenoid valve if you are unfamiliar with electronic
solenoid valves.
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 also be modied in faucets as
follows:
Press the IN button. Wait until a quick flashing of the LED in 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
aer 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 modied as follows:
Press the OUT button. Wait until a quick flashing of the LED in the
sensor eye is perceived. Then, press + to increase the delay out
time and – to reduce it.
 HOUR HYGIENE FLUSH: This model includes a  hours hygiene
flush which is disabled. To activate the hygiene flush, press the
clock button. Wait until a quick flashing of the LED in the sensor eye
is perceived. Then press + to activate the hygiene flush. To disable
it again, press – to deactivate it.
COMFORT FLUSH: If your model includes a Comfort flush setting, it
can be activated by pressing the flush button.
When the button is pressed, one blink of the LED in the sensor eye
is perceived. The pre-programmed flush cycle will take place then.
The Comfort flush cannot be interrupted or deactivated by pressing
any button until it is over.
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).
The faucet 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 restores all the factory settings
except for the sensor range. If required, press the Reset button
and without releasing it, press the + button once.
NOTE: To enter the self adjusting mode, use the ADJ button. To change the sensor
range, use the RANGE button.
seTTiNgs aDjusTmeNT

 
BaTTery rePlacemeNT
Battery models only
When the battery weakens, the LED indicator light will blink at a constant rate when
the user hands are within the sensor range. The battery must be replaced within two
weeks.
To replace the battery (battery models only):
. For D: Unscrew and remove the battery box lid screw.
Carefully open the battery box and remove the old batteries. Replace the used
batteries with six new .V AA batteries. Do not install both used and new batteries
in the same box. Close the box.
. For D Dual Power B: Carefully open the dual power input box using the Allen key
provided. Remove the old battery and replace it with a new 9V battery (Lithium
battery is recommended). Close the box lid and tighten it with the screw.
. For DB Box: Release the screws at the panel and remove it. The battery box is
located behind the panel. Carefully open the battery box and remove the old battery.
Replace the used battery with a new 9V battery (Lithium battery is recommended).
Close the box and re-assemble the wall cover panel.
Important: D is supplied with a self adjusting sensor. The ideal sensor range for the
specic location will be set automatically again aer changing the battery.
sPare ParTs
SPARE PARES  D
Screws Kit 
-Pack Sensor Kit 
-Pack Solenoid and Housing Kit 
-Pack Solenoid Valve Kit 
-Pack Diaphragm Kit 
Battery box for  X .V batteries (batteries excluded) 
V Transformer (EU plug) 
Check that there are no objects in front of
the sensor aer the battery replacement
was completed.
Aer you have replaced the battery,
move away from the sensor range. Wait
 seconds in order to allow the system
to set the ideal sensor range. Then aer
the self adjustment has taken place
the solenoid valve will be opened and
closed for 1 second as an indication that
the ideal sensor range was set and the
product is ready for use.
Important: Spent batteries should not be disposed of with normal
household waste. Contact your local authority for information on
waste disposal and recycling.
D28 | D28 e

 
SPARE PARES  D BOX
Screws Kit 
-Pack Sensor Kit 
-Pack Solenoid and Housing Kit 
-Pack Solenoid Valve Kit 
-Pack Diaphragm Kit 
Battery box for V battery 
V Transformer (EU plug) 
Remote Control B (Optional) 
Soap & Water Remote Control (Optional) 
SPARE PARES  D DUAL POWER
Seals & Screws Kit 
-Pack Sensor Kit 
Dual Power Input Box 
-Pack Solenoid Valve Kit 
-Pack Diaphragm Kit 
V Transformer (EU plug) 
D28 Dual Power B
D28 Dual Power e sPare ParTssPare ParTs D28 BoX / D28 e BoX

 
limiTeD warraNTy
SOLUTIONCAUSEINDICATORPROBLEM
Increase the range. Range is too short.. LED in the
sensor does not
flash once when
user’s hands
are within the
sensor’s range.
No water
is coming
out of the
faucet: Decrease the range. Range is too long.
. Unit is in “Security Mode”*
Eliminate the cause of
reflection.
. Sensor is picking up reflections from the
washbasin or another object.
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.
. Debris or scale in solenoid.. LED in the
sensor flashes
once when
user’s hands
are within the
sensor’s range.
Clean the orice or replace
the diaphragm.
. The central orice in the diaphragm is
plugged or the diaphragm is torn
Reduce the supply water
pressure.
. The water supply pressure is higher than
8 bar.
Shut o the water supply
and unscrew one of the
flexible pipes in order to
reduce the pressure that
blocks the product.
. 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 aer water supply pressure drops under
8 bars.
Clean the orice or replace
the diaphragm.
. Debris or scale in diaphragm. Sensor flashes
once when
user’s hands
are within the
sensor’s range.
Water flow
from spout
does not
stop: Connect the connectors
properly. Refer to page 11.
. Connectors between the electronic unit and
the Dual power input box are disconnected or
not connected properly
Clean or eliminate the cause
of interference.
. Sensor is dirty or covered.. LED in the
sensor does not
flash once when
user’s hands
are within the
sensor’s range.
Decrease the range or
eliminate the cause of
reflection.
. Sensor is picking up reflections from the
washbasin or another object.
Remove, clean, re-install the
lter or aerator
Filter or aerator is cloggedWater flow
diminished
TrouBleshooTiNg
* “Security Mode”: If the sensor is covered for more than 90 sec. the faucet will automatically shut o water
flow. To return to normal operation remove any blockage to re-establish operation.
Y. Stern Engineering Ltd. warrants that its electronic products 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 product.
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, 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 or soap tank.
- Use of the soap outside of viscosity specications.
- Alteration of the original soap/foam dispenser components (including pipes).

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