Stern Engineering 280300 Product manual

1
INSTALLATION AND MAINTENANCE GUIDE
BEHIND MIRROR TOUCH FREE FAUCET

INDEX
 TECHNICAL DATA
 PACK CONTENTS
 PRE-INSTALLATION INFO
 INSTALLATION
 SETTINGS ADJUSTMENT WITH REMOTE CONTROL
 BATTERY REPLACEMENT
 MAINTENANCE
 SPARE PARTS LIST
 WARRANTY
 SERVICE CHECK LIST
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 discre-
tion, 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
BTM B 
Power supply: IP  Black battery box for x.V AA
Alkaline batteries \ Transformer
Recommended water pressure:
.. bar  PSI
With water pressure of more than 8 bars,
use a pressure reducing valve
Sensor range: Self adjusting sensor. Adjustable with
remote control
Minimum sensor range:  mm
Maximum sensor range:  mm
Security time:  seconds. Can be reduced with the remote
control
Hot water temperature: Max. ºC
BTM E 

2
PACK CONTENTS
Familiarize yourself with the part names and confirm that the parts are included.
 screws up to mm
(not supplied)
 x Plate with faucet spout,
sensor and solenoid valve
TRANSFORMER
IP 67 BLACK BATTERY BOX
FOR 6X1.5V AA ALKALINE
BATTERIES

3
PRE-INSTALLATION INFO
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.
PREPARATION FOR INSTALLATION
Flush the water supply lines thoroughly before installing the faucet. Do not allow dirt,
teflon tape or metal particles to enter the faucet. Shut o the water supply.
IMPORTANT
All plumbing is to be installed in accordance with applicable codes and regulations.
Pay attention that the dimensions of the mirror compartment ts the dimensions of the
faucet plate.
WARNING
) To avoid reflection problems keep a
distance of more than  mm. between
the sink and the spout.
) This faucet model, with an infrared
sensor pointing down, is not intended to
be used together with a sink of a reflec-
tive material such as stainless steel.
) If a sink strainer is straight below the
faucet sensor, use a strainer with a non
reflective nish (do not use a chrome
plated one).
Min  mm.
Bottom of the washbasin

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FAUCET INSTALLATION
STEP 1 – PREPARATION FOR INSTALLATION
1Shut o the water
supply.
2
Cut a hole in the
bottom of the mirror
compartment for the
faucet sensor and spout
both.
The recommended hole
size should be x
mm. 60 mm 40 mm
STEP 2 – INSTALLING THE FAUCET
1
Remove the protective
sticker covering the
sensor.
2
Place the faucet
assembly inside the
mirror compartment
with the spout sticking
out of the hole.

5
FAUCET INSTALLATION
3
Secure the plate to the
wall with  screws (not
supplied).
4
Connect the flexible
pipe to the main water
supply.
Turn on the central
water supply and check
for leaks.

6
FAUCET INSTALLATION
STEP 3 – CONNECTING THE POWER SOURCE
IMPORTANT: This product includes a self
adjusting sensor.
The ideal sensor range for the specic
location will be set automatically.
1
Connect the connectors between
the solenoid valve and the
electronic unit.
2
For battery versions:
Install the battery box on the wall
in the mirror compartment and
connect the battery connector.
For transformer versions:
Plug the transformer into the
electricity socket and make sure
the transformer connector is
connected to the sensor.
3
Wait about  seconds before you
put your hands within the sensor
range.
10
SECONDS
If the automatically adjusted sensor range is not satisfactory to your purposes,
please refer to the section entitled “Settings adjustment”.
Before
proceeding,
check that
no objects
are in front
of the sensor
besides the
washbasin.

7
SETTINGS ADJUSTMENT
ADJUSTING THE SETTINGS WITH THE REMOTE CONTROL
If necessary, the sensor settings can be adjusted as follows:
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).
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 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. Aer nishing the
adjustment, turn the water supply back on.
DETECTION
RANGE DELAY OUT TIME
DELAY IN TIME TEMPORARY OFF
FUNCTION
ENTRANCE TO THE
SELF ADJUSTMENT
MODE
RESET
LOCK OUT TIME 24 HOUR HYGIENE
FLUSH

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SETTINGS ADJUSTMENT
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 red light 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 red light 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 red light in 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
also be modied in faucets as follows:
Press the IN button. Wait until a quick flashing of the red light in the
sensor eye is perceived. Then, press + to increase the delay in time
and – to reduce it.

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SETTINGS ADJUSTMENT
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 red light in the
sensor eye is perceived. Then, press + to increase the delay out time
and – to reduce it.
24 HOUR HYGIENE FLUSH: If you have a compatible model with a 24
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 in 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). 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.

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BATTERY REPLACEMENT
1
Carefully open the battery box place
within the mirror compartment, using a
screw driver.
OLD BATTERY
OLD BATTERY
OLD BATTERY
OLD BATTERY
OLD BATTERY
OLD BATTERY
2Remove the old batteries.
OLD BATTERY
OLD BATTERY
OLD BATTERY
OLD BATTERY
OLD BATTERY
OLD BATTERY
3
Replace the used batteries with new
.V AA batteries.
NOTE: Do not mix used batteries with
new ones.
NEW BATTERY
NEW BATTERY
NEW BATTERY
NEW BATTERY
NEW BATTERY
NEW BATTERY
4Close the box.
NEW BATTERY
NEW BATTERY
NEW BATTERY
NEW BATTERY
NEW BATTERY
NEW BATTERY
When the battery weakens, the red indicator light will blink at a constant rate when the
user’s hands are within the sensor range. The battery must be replaced within two weeks.
IMPORTANT: Spent batteries should not be disposed of with normal household waste.
Contact your local authority for information on waste disposal and recycling.

11
MAINTENANCE
FILTER CLEANING INSTRUCTIONS
The system is provided with one stainless steel lter preventing foreign particles
to enter the lines. It is recommended to clean the lters every six (6) months. If the
water flow has decreased, this may be because the lter is clogged. The lters can be
cleaned as follows:
. Shut-o the water shut o valve.
. Disassemble the faucet and remove the lter located between the solenoid hous-
ing and the flexible pipe.
. Wash the lter under running water.
. Reassemble the parts.
. Make sure that there is no water leakage.
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.
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 shower. For surface cleaning of faucets use ONLY soap
and water, then wipe dry with clean cloth or towel. When cleaning bathroom tile, the
faucet should be protected from any splattering of harsh cleansers

12
SPARE PARTS LIST
SEALS AND SCREWS KIT 
PACK SENSOR KIT 
PACK SOLENOID AND HOUSING KIT 
PACK SOLENOID KIT 
DIAPHRAGM 
IP BLACK BATTERY BOX FOR X.V AA BATTERIES 
TRANSFORMER 
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 shower, 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.

13
SERVICE CHECK LIST
* “Security Mode”: If the sensor is covered for more than  sec. the faucet will automatically shut o water flow.
To return to normal operation remove any blockage.
** In this case, the water flow will stop anyway aer  seconds because of the security time.
SOLUTIONCAUSEINDICATORPROBLEM
Replace battery.Low battery.
.Sensor flashes
continuously
when user’s
hands are within
the sensor’s
range.
No water
coming out
of the faucet.
Increase the range.. Range is too short.
. Red light in
the sensor does
not flash once
when user’s
hands are
within the sen-
sor’s range.
Decrease the range.. Range is too long.
The battery must be replaced.. Battery is completely used up.
. Unit is in “Security Mode”*
Eliminate cause of reflection.
. Sensor is picking up reflections from the
washbasin or another object.
Unscrew the solenoid, pull out
the plunger and the spring from
the solenoid and clean them.
Use a scale remover material
if needed. When replacing the
plunger, please make sure that
the spring is in vertical position.
. Debris or scale in solenoid.
. Red light
in the sensor
flashes once
when user’s
hands are within
the sensor’s
range.
Clean the orice or replace
diaphragm.
. The central orice in the diaphragm is
plugged or the diaphragm is torn.
Reduce the supply water
pressure or install a pressure
reducer valve.
. The water supply pressure is higher than 8
bar (116 PSI).
Shut o water supply and un-
screw 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
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.
Clean or eliminate case of
interference.
. Sensor is dirty or covered.**
. Red light in
the sensor does
not flash once
when user’s
hands are within
the sensor’s
range.
Decrease the range or eliminate
cause of reflection.
. Sensor is picking up reflections from the
washbasin or another object.
Remove, clean, re-install.Filter or aerator is clogged.
Water flow
diminished.

14
. 
 Gan Rave Blvd.,  Gan Rave, Yavne, Israel
Tel: , Fax: , [e-mail]
www.sternfaucets.com