Acorn MERIDIAN 3753 Instruction manual

A C O R N E N G I N E E R I N G C O M P A N Y
P. O . B O X 3 5 2 7 • C I T Y O F I N D U S T R Y, C A 91 7 4 4 U . S . A .
T O L L F R E E 8 0 0 - 4 8 8 - 8 9 9 9 : : L O C A L 6 2 6 - 3 3 6 - 4 5 6 1
FA X 6 2 6 - 9 6 1 - 2 2 0 0 : : w w w. a c o r n e n g . c o m
A C O R N E N G I N E E R I N G C O M P A N Y
P. O . B O X 3 5 2 7 • C I T Y O F I N D U S T R Y, C A 91 7 4 4 U . S . A .
T O L L F R E E 8 0 0 - 4 8 8 - 8 9 9 9 : : L O C A L 6 2 6 - 3 3 6 - 4 5 6 1
FA X 6 2 6 - 9 6 1 - 2 2 0 0 : : w w w. a c o r n e n g . c o m
3753
®
MERIDIAN
MODEL
HI-LO TRI BASIN
®
CORTERRA
ADA-COMPLIANT
?Chalk Line
?7/16" Hex Wrench
?Carpenters Level
?Hammer
?1/2" NPS Supply Angle Stops An
?Plumbers Putty
?3/8” (12 Count) Fixture Wall Anchors and
Anchoring Hardware (and Appropriate Tools)
?#10 (10 Count) Fixture Wall Anchors and
Anchoring Hardware (and Appropriate Tools)
?Teflon Tape
ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
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3753-LHL, LO-HI-LO
DECK CONFIGURATION
Part #: 6215-372-000
Dimensional Data........................................4
Cleaning and Maintenance................................22
Troubleshooting. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20 - 21
Piezo Adjustment. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17 - 19
Rough-Ins . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 - 8
Components & Repair Parts. . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 -26
Accessibility Comparison . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Warranty Information ....................................27
Installation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9 - 15
TABLE OF CONTENTS
Prior to Installation.......................................2
REQUIRED ITEMS FOR INSTALLATION - NOT SUPPLIED
Revised: 03/05/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3753-LHL
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Page 2 of 27
Part #: 6215-372-000
Industry standard wall backing, for wall hung fixtures, is required. Installer provided wall
anchors and wall anchoring hardware must be appropriate for wall construction, and
have a minimum pull-out rating of 1000 lbs. (453.6 kg).
Important: Some options may slightly alter installation. To ensure proper installation
review the manual thoroughly and verify rough-ins before beginning any work. File this
manual with the owner or maintenance personnel upon completion of installation.
ANSI, UFAS or ADA compliance is subject to the interpretation and requirements of the
local code authority and is the responsibility of the installer for verification.
Single Temp Valve Assembly: Recommended working water pressure is 30 psi (2.07
bars) minimum to 100 psi (6.89 bars) maximum. Maximum temperature is 130°F
(54.4°C). Maximum outlet temperature is recommended is 105°F (40.6°C). Valve
assembly must be drained prior to being subjected to freezing temperatures. A
checkstop is provided with this valve assembly.
T/P Mixing Valve Assembly: Recommended working water pressure is 30 psi (2.07 bars)
minimum to 125 psi (8.62 bars) maximum. Maximum hot water temperature is 180°F
(82°C). Temperature adjustment range is 85-115°F (29-46°C). Valve assembly must be
drained prior to being subjected to freezing temperatures. The valve assembly has
checks integral to the inlets however, angle stops are to be provided by the installer.
Teflon tape is recommended on all threaded waste and supply connections to reduce the
possibility of leaks.
Provide 110-120VAC/60Hz/3A (MAX) electrical receptacle for factory supplied
120VAC/9VDC, 100mA plug-in transformer.
NOTE: Receptacle(s) must be wired to a GFCI protected circuit. Fixture must be earth
grounded per N.E.C. (National Electrical Code).
Prior to installation, supply lines must be flushed of all foreign material such as pipe
dope, chips, or solder. Debris or foreign material in water supply may damage valve.
Revised: 03/05/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3753-LHL
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Page 3 of 27
ACCESSIBILITY COMPARISONS
Part #: 6215-372-000
ADA ages
6 thru 12
ADA
Adult
133
8"
5"
22"
34" Rim
Max.
ADA
PROFILE
3"
143
4"
27"
241
2"
CHILD ADA
PROFILE
24"
103
8"
5"
22"
31" Rim
Max.
3"
143
4"
241
2"
123
8"
5"
22"
33" Rim
Max.
3"
143
4"
241
2"
OBC
PROFILE
OBC
Revised: 03/05/19

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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
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Page 4 of 27
DIMENSIONAL DATA
22"
90"
15" 30" 30"
3753-HLH SHOWN
30" 30"
4"
205
8"
Part #: 6215-372-000 Revised: 03/05/19

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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3753-LHL
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Page 5 of 27
ROUGH-IN DIMENSIONS -ADA (Adult)
MOUNTING PLUMING
A - Wall Anchoring for .563" Diameter x 1" Long, Angle Bracket Mounting Slots, 8 Places.
B - Supply Stub-Outs with Stops for Valve 1/2" NPT Hot & Cold Supply Inlets.
D - 120VAC, 60 Hz, 3A (Max.) GFCI Protected, Electrical Receptacle.
E - Wall Anchoring for .219" Diameter x 3/8" Long, Enclosure Mounting Slots,10 Places.
F - Valve Mounting Area.
C - Waste Outlet for 1-1/2" O.D. P-Trap Provided.
Part #: 6215-372-000
3753-LHL SHOWN
4"
53
4"
34" Rim
Max
4"
30" 30"
90"
15"
9"
211
4"
D
A
AA
5"
2"
B
B
C
83
8"
231
4"
173
4"
9"
4"
A
AA
4"
D
E
E
E
E
E
E
EE
E
E
6"
F
E
E
E
E
E
E
C
15"
161
4"
211
2"31
2"
261
2" 261 2"
861
2"
13
4"
131
4"
Revised: 03/05/19

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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3753-LHL
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for most current specifications.
Page 6 of 27
ROUGH-IN DIMENSIONS -ADA
AGES 6 THRU 12 YEARS
MOUNTING PLUMING
A - Wall Anchoring for .563" Diameter x 1" Long, Angle Bracket Mounting Slots, 8 Places.
C - Waste Outlet for 1-1/2" O.D. P-Trap Provided.
F - Valve Mounting Area.
D - 120VAC, 60 Hz, 3A (Max.) GFCI Protected, Electrical Receptacle.
B - Supply Stub-Outs with Stops for Valve 1/2" NPT Hot & Cold Supply Inlets.
E - Wall Anchoring for .219" Diameter x 3/8" Long, Enclosure Mounting Slots,10 Places.
Part #: 6215-372-000
3753-LHL SHOWN
4"
53
4"
31" Rim
Max
4"
30" 30"
90"
15"
9"
181
4"
D
A
AA
5"
2"
B
B
C
83
8"
201
4"
143
4"9"
4"
A
AA
4"
D
E
E
E
E
E
E
EE
E
E
6"
F
E
E
E
E
E
E
C
15"
131
4"181
2"31
2"
261
2" 261 2"
861
2"
13
4"
131
4"
Revised: 03/05/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3753-LHL
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for most current specifications.
Page 7 of 27
ROUGH-IN DIMENSIONS -OBC
ONTARIO BUILDING CODE
Part #: 6215-372-000
3753-LHL SHOWN
A - Wall Anchoring for .563" Diameter x 1" Long, Angle Bracket Mounting Slots, 8 Places.
B - Supply Stub-Outs with Stops for Valve 1/2" NPT Hot & Cold Supply Inlets.
F - Valve Mounting Area.
C - Waste Outlet for 1-1/2" O.D. P-Trap Provided.
D - 120VAC, 60 Hz, 3A (Max.) GFCI Protected, Electrical Receptacle.
E - Wall Anchoring for .219" Diameter x 3/8" Long, Enclosure Mounting Slots,10 Places.
MOUNTING PLUMING
4"
53
4"
33" Rim
Max
4"
30" 30"
90"
15"
9"
201
4"
D
A
AA
5"
2"
B
B
C
83
8"
221
4"
163
4"
9"
4"
A
AA
4"
D
E
E
E
E
E
E
EE
E
E
6"
F
E
E
E
E
E
E
C
15"
151
4"
201
2"31
2"
261
2" 261 2"
861
2"
13
4"
131
4"
Revised: 03/05/19

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®
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FIXTURE ANCHORING
Page 8 of 27
FYI: Fixtures are shipped with wall
mounting brackets pre-installed
onto the fixture.
14
2
Secure requirement portions of the fixture 2 , (ADA, TAS etc...) to mounted angle brackets 1 with
of fixture 2 adjust and level as required. Do not over tighten.
¼-20 hex head cap screws, lock washers and fender washers 4 provided.
Secure remaining mounted angle brackets 3 to wall & starting with the flat or requirement portion
Place deck on wall mounted angle brackets 1 and align the remaining mounted angle brackets 3
with installed wall anchors. Fasten to wall loosely and proceed to step C.
C.
D.
E.
NOTE: It may be advantageous to install to the deck, faucets, soap
dispensers or other accessories prior to wall mounting.
Disassemble fixture from crate and remove
angle brackets 1 from flat or requirement
portions of fixture 2 . Loosen remaining
angle brackets 3 but keep finger tight.
A.
plumb as required. All wall anchors and wall
anchoring hardware are by others.
Anchor the free angle brackets 1 to
finished wall using installer provided ½”
anchoring hardware (4 places). Level and
B.
!IMPORTANT
fixture 2 refers to the stations that
Straight or requirement portions of
are intended to meet ADA Guidelines.
3
2
1
44
Part #: 6215-372-000 Revised: 03/05/19

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1
2
3
4
4
3
5
HINT: Teflon tape is recommended on all threaded waste and
supply connections.
NOTE: Continuous waste assembly will require field cutting and
fitting by the installer.
À Grid Strainer w/ 1-1/2" -16
UNE Threads
Á Rubber Gasket
 Flat Fiber Washer
à 1-1/2" -16 UNI Rough Chrome
Brass Jam Nut
Ä 1-1/2"-16 x 1-1/4" UNI Close Ell
with 3/8" NPT Clean-Out Plug
Page 9 of 27
install grid strainer and close elbow to bowl using
plumber's putty.
A.
Assemble continuous waste piping using teflon
tape on all threaded connections and make up
waste connections to 1-1/2” P-Trap.
B.
30"
151
2"
6"
30"
51
8"
2"
Part #: 6215-372-000 Revised: 03/05/19

ACORN ENGINEERING FIELD SERVICE
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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
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Page 10 of 27
1/2" SPOUT HOSE
1/2" HOSE x
1/4" NPT
ADAPTER 1/4" NPT x 1/4" O.D.
TUBE ADAPTER
1/4" PE O.D. TUBING
NUT
WASHERS
NOTE: FITTINGS AND TUBE SHOULD BE KEPT
CLEAN, BAGGED AND UNDAMAGED PRIOR TO
INSTALLATION.
PUSH-IN FITTING INSTALLATION
3. Pull on the fitted tubing to ensure it is secure. Tube
should not come free from the fitting. Water test the
connection assembly prior to leaving the site to ensure
there are no leaks.
4. To disconnect the tube from the fitting ensure that the
water supply is off. Push collet square towards the
push-in fitting body and hold. While holding the collet in,
pull on the PE tubing to remove from the push-in fitting.
1. Cut to fit length of 1/4” PE tubing and remove any burrs
or sharp edges. Ensure that the outside diameter is free
from score marks. Tube ends should be square.
2. Firmly and fully insert the tubing end into the push-in
fitting up to the tube stop located approximately 1/2”
deep.
1.
2.
3.
4.
1. Assemble spout to deck securing it with nut.
3. Connect 1/4” O.D. PE tubing from valve.
SPOUT INSTALLATION
2. Assemble hose adapter to tube adapter and connect
to spout hose.
Part #: 6215-372-000
ADAPTER
TUBE STOP
1/4" PE TUBING
COLLET
HOSE
COLLET
Revised: 03/05/19

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Page 11 of 27
Part #: 6215-372-000
NOTE: Installation should be in accordance with
accepted plumbing practices.
1) Locate suitable place for mounting the valve
assembly. Valve assembly should be
accessible for service and adjustment and
as close to the point-of-use as possible.
Wall anchors and anchoring hardware, for
Ø 3/8” mounting holes, provided by installer.
2) Connect hot and cold water to supply
valve using 1/2” NPTE connections.
3) Connect outlet of tempering valve to
spout(s) using 1/2” NPT connections
provided.
4) Turn on hot and cold water supplies. If any
leaks are observed, hand tighten
connections as necessary to stop leaks
before proceeding.
5) Turn on fixture and allow water to flow for 2
minutes. Measure water temperature at
outlet. If water is not at desired temperature,
adjust as necessary.
2) Turn on fixture and run water for at least 2
minutes. Allow supply temperature to
stabilize.
3) Turn temperature stem counter-clockwise
for hotter or clockwise for colder outlet
temperature.
1) Loosen locknut.
4) Tighten locknut to prevent accidental or
unauthorized temperature adjustment.
5) Re-check outlet temperature.
Temperature Adjustment:
Valve Assembly Installation:
VALVE INSTALLATION & ADJUSTMENT
!IMPORTANT
Flush supply lines of all foreign material such
as pipe dope, pipe chips, solder, sand etc.
before making up supply connections.
HINT: Angle stops are recommended
and is the responsibility of the installer.
LOCKNUT
WARMER
TEMPERATURE
STEM
Revised: 03/05/19

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ACCESS PANEL INSTALLATION
Page 12 of 27
7
6
HINT: It may be advantages to install deck
trim such as faucets, soap dispensers or
other accessories prior to wall mounting.
Position bridge enclosure 5 over combined waste and accessory
tubing and secure to wall.
All wall anchors and anchoring hardware provided by others.
HINT: For installation convenience: Trap
enclosure support flanges 6 are intended to
slide over support tabs 7 on angle brackets
while securing enclosures to the wall.
Position station enclosures 8 aligning mounting
points and secure with installer provided hardware.
5 5
8
Part #: 6215-372-000 Revised: 03/05/19

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-SO Sensor Operation
Range Adjustment
3. Move hand in front of sensor to distance of 2” to 4”
within 5 seconds and wait until red light flashes
quickly.
1. Make sure power supply is disconnected from
sensor and make short circuit on red wires.
See DETAIL A.
2. Connect power supply to sensor. Red light should
be flashing.
4. Move hand to desired sensing distance.
See DETAIL B.
5. Hold hand at desired sensing distance until red light
stops flashing and solenoid activates.
See DETAIL C.
DETAIL A
DETAIL B
DETAIL C
Transformer must
be plugged into a
GFI protected
circuit. Fixture must
be earth grounded
per N.E.C. or
applicable codes.
Jumper
By Others
-SO Sensor Operation
Model 3753-1-HLH-SO Shown
SENSOR OPERATION & CONNECTIONS
Page 13 of 27
Part #: 6215-372-000 Revised: 03/05/19
-SO SENSOR
-PPZ PUSHBUTTON
RED BLUE
RED
BLUE
TRANSFORMER
SOLENOID VALVE

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To service or install batteries
remove access panel by
removing (4) 10-32 x 3/4"
screws from front of fixture
using allen head bit provided
(socket & driver by others).
Replace access panel when
finished.
-SO-BAT
Sensor Operation Battery Powered
SENSOR OPERATION & CONNECTIONS -BATTERY OP
Acorn does not provide batteries for -BAT units.
Each Pack requires (6) AA batteries.
Page 14 of 27
Part #: 6215-372-000 Revised: 03/05/19
-SO SENSOR
-PPZ PUSHBUTTON
RED BLUE
RED
BLUE
TRANSFORMER
SOLENOID VALVE

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Ferrule Nut
1/4"
Min.
Ferrule
Nut
-H Hand Operated
1/8" O.D. AIR TUBE
1/4" O.D. WATER LINE
Leave a minimum 1/4” of polyethylene tubing
through the Ferrule Nut on the pushbutton
assembly. This is necessary to ensure proper
tubing connection.
Timing Screw
To adjust timing,
turn timing screw.
HAND OPERATION & CONNECTIONS
Turn timing screw clockwise to
increase timing.
Do not over tighten
ferrule nuts.
Page 15 of 27
Part #: 6215-372-000 Revised: 03/05/19

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INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
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for most current specifications.
OPTIONAL ACCESSORY INSTALLATION & ASSEMBLY
HINT: For best results, install soap
reservoir directly below soap filler hole on
deck with refill tube as short and straight
as possible.
Some soaps contain corrosive additives that can cause rust in
soap dispensers. Acorn Engineering Company recommends
user/ maintenance personnel review MSDS reports of soap and
possible corrosive additives noted.
!WARNING
Page 16 of 27
Anti-Rotation
Pin
Rubber
Gasket
Washer
Black end of
Check Valve
Direction
of Flow
3/8" Nut
3/8" O.D.
Tube
Mounting
Bracket
Install soap reservoir to wall inside trap enclosure
using mounting brackets provided as shown. Wall
anchors and anchoring hardware provided by
installer.
A.
Install soap filler assembly to deck as shown.
B.
Attach 1-1/4" O.D. refill tube to soap filler
assembly and soap reservoir with provided hose
clamps.
C. Install soap dispenser(s) onto deck by aligning
Anti-Rotation Pin with Key Hole. NOTE: Gasket
and Washer are located beneath the deck.
D.
Attach 3/8" O.D. Tubing to the dispenser(s) and
reservoir. NOTE: Check Valve must be field
spliced into tubing and installed with respect to
direction of flow.
E.
Soap Filler
Plug
Rubber Gasket
3/8" O.D.
Tubing
Part #: 6215-372-000 Revised: 03/05/19

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Programming Instructions (Flow Time Adjustment)
Programable Piezo Pushbutton
— 1 second timing mode: Each push of the button adds 1 second to the total timing cycle.
To program the piezo pushbutton, you will need to be able to see the back of the piezo pushbutton.
In order to start the programming the piezo pushbutton, the button must be powered down. Disconnect the red power
cable and wait 20 seconds, then reconnect the red power cable.
To move on to the 20 sec timing mode, pause and wait for the LED to flash 3 times, now you are in the 20 sec timing
mode and each time the button is pushed the LED will flash, adding 20 sec to the total timing cycle. After programing
is complete, pause and wait for the LED to flash 4 times and then 5 times, which completes the programming.
— Each timing mode (1 sec, 5 sec or 20 sec timing mode) can be sequenced up to 100 times, that is
the number of times, the button can be pushed, to increase the total timing cycle in each timing mode.
To move on to the 5 sec timing mode, pause and wait for the LED to flash 2 times, now you are in the 5 sec timing
mode. Each time the button is pushed the LED will flash, adding 5 sec to the total timing cycle.
THE TIME SETTINGS PROGRAM USES 3 DIFFERENT TIMING MODES:
— 5 second timing mode: Each push of the button adds 5 seconds to the total timing cycle.
— 20 second timing mode: Each push of the button adds 20 seconds to the total timing cycle.
Prevision must be made to access the back of the piezo pushbutton. There is an LED on the back of the piezo
pushbutton under a layer of transparent epoxy, used as a programming indicator light.
As soon as the cable is reconnected the LED will start flashing, it will flash 4 times, then stays on for 3 seconds.
During the 3 second period, push the piezo button once, the LED will go out, now you are in the 1 sec timing mode
and each time the button is pushed the LED will flash, adding 1 sec to the total timing cycle.
— When a timing mode is not required then do not push the button and wait for the next timing mode.
NOTE: This programming procedure moves along rapidly, there is
only about 2 or 3 seconds between programming operations.
The Button is factory set an 8 sec. timing cycle, if an 8 sec. cycle is adequate, then no programming adjustment
is required.
NOTE: Read the entire document before
trying to program the piezo pushbutton.
Part #: 6215-372-000 Page 17 of 27
®
MERIDIAN 3753-LHL
Revised: 03/05/19

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Determine the
number of seconds
per timing cycle
1 Push = 1 Second
x 1 = sec
Fill in all the
Boxes below
1 Push = 5 Seconds
x 5 = sec
ADD
1 Push = 20 Seconds
x 20 = sec
ADD
Total timing cycle equals
seconds
EQUALS
Ÿ Pause and wait for the LED to flash 3 times.
— Power down piezo button for 10 seconds.
Ÿ Pause and wait for the LED to flash 2 times.
Ÿ You are in the 5 sec timing mode, immediately push the button, 1 push
equals 5 sec added to the total timing cycle.
Ÿ LED turns off.
Ÿ You are in the 1 sec timing mode, immediately push the button, 1 push
equals 1 sec added to the total timing cycle.
PROGRAMING STEPS:
Ÿ Reconnect power.
Ÿ While the LED is steady on, push button.
Ÿ LED flashes, then stay on.
Ÿ You are in the 20 sec timing mode, immediately push the button, 1
push equals 20 sec added to the total timing cycle.
Programmable Piezo Pushbutton
Programming Instructions (Flow Time Adjustment)
WORKSHEET
(FILL IN ALL BOXES, WHICH WILL SIMPLIFY THE PROGRAMMING PROCEDURE)
Part #: 6215-372-000 Page 18 of 27
®
MERIDIAN 3753-LHL
Revised: 03/05/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
Please visit www.acorneng.com
for most current specifications.
BLACK RED
BLACK SOLENOID
CABLE
RED POWER
CABLE
PROGRAMMING INDICATOR
LED LIGHT
TRANSPARENT
EPOXY FILLING
PIEZO
PUSHBUTTON
Part #: 6215-372-000 Page 19 of 27
®
MERIDIAN 3753-LHL
Revised: 03/05/19

ACORN ENGINEERING FIELD SERVICE
TOLL FREE 800-743-8259 • LOCAL 626-855-4866 • FAX [phone]
INSTALLATION, OPERATIONS & MAINTENANCE MANUAL
®
MERIDIAN 3753-LHL
Please visit www.acorneng.com
for most current specifications.
TROUBLE SHOOTING FOR 9 VOLT DC SENSOR OPERATED VALVES
Normal Valve Function: 9 Volt DC sensor operated valve has flow time of 90 seconds maximum.
To reactivate, the user must move out of and return to the sensing area.
CONDITION: WATER DOES NOT FLOW
Indicators Probable Cause Solution
Sensor flashes continuously
every 2 seconds when
hands are within range.
Low battery warning Replace battery
Circuit breaker tripped. Reset circuit breaker
Replace battery
Defective 9V DC transformer
Transformer polarity crossed Replace transformer (sensor may be
damaged and need replacement).
Unit is in “Security Mode” after
90 seconds of constant detection.
Remove sources of detection and
wait 30 seconds before checking.
Range is too short. Increase range.
Range is too long. Decrease range and wait 30 seconds.
Sensor is picking up a highly
reflective surface. Eliminate cause of reflection and wait
30 seconds before checking.
Sensor does not flash
when the user’s hands
are within range.
Defective sensor. Replace sensor.
Stops or water main closed.
Bad sensor to solenoid connection.
Debris or scale in
solenoid assembly.
Remove solenoid, pull out plunger
and spring, and clean with scale
remover solution or pressurized air.
Debris or scale in diaphragm. Remove diaphragm and clean
Sensor flashes once
when user’s hands are
within range.
Remove strainer and clean.
CONDITION: FALSE TRIGGERING;
WATER FLOWS CONTINUOUSLY
Indicators Probable Cause Solution
Remove diaphragm and clean. Sensor flashes when user’s
hands are within range. Diaphragm is defective or torn.
Sensor is dirty or covered. Clean or uncover sensor and
wait 30 seconds.
Decrease range and wait 30 seconds.
Sensor does not flash when
users hands are within range. Range too long or highly
reflective surface, sunlight, bright
lights etc. are triggering sensor. Eliminate cause of reflection or
correct lighting problem.
CONDITION: WATER FLOWS
CONTINUOUSLY BUT STOPS
WHEN HANDS ARE WITHIN RANGE
Indicators Probable Cause Solution
Water runs continuously when
sensor not activated. Sensor
flashes when hands are within
range and water shuts off.
Solenoid polarity crossed. Disconnect solenoid and
reverse polarity.
Battery completely used up.
Replace transformer.
Open stops or water main.
Ensure wires make proper contact.
Debris or scale in strainer.
Replace diaphragm.
Debris or scale in diaphragm
Page 20 of 27
Part #: 6215-372-000 Revised: 03/05/19