Kohler K-10956 Operating manual

Maintenance Guide
Exposed Electronic Valve
Mproduct numbers are for Mexico (i.e. K-12345M)
Los números de productos seguidos de
Mcorresponden a México (Ej.
K-12345M)
Français, page “Français-1”
Español, página “Español-1”
K-10956, K-10957, K-10962
1058866-5-D

Table of Contents
EC Declaration of Conformity ............................. 3
Important Information ................................... 4
Thank You For Choosing Kohler Company ................... 4
Your Kohler Electronic Valve .............................. 5
Care and Cleaning ..................................... 6
Control Stop Valve Operation ............................. 7
Remove the DC Sensor ................................. 8
Replace the Batteries ................................... 9
Install the DC Sensor .................................. 10
Remove the Solenoid .................................. 11
Install the Solenoid .................................... 12
Clean the Screen/Replace the Piston ...................... 13
Clean/Replace the Diaphragm ........................... 15
Replace the Vacuum Breaker ............................ 17
Replace the Flush Button Assembly ....................... 18
One-Year Limited Warranty .............................. 18
Troubleshooting ...................................... 19
Service Parts ........................................ 24
1058866-5-D 2 Kohler Co.

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Kohler Co. 3 1058866-5-D

Important Information
This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
This device may not cause harmful interference.
This device must accept any interference received, including
interference that may cause undesired operation.
NOTE: This equipment has been tested and found to comply with
the limits for a Class B digital device, pursuant to Part 15 of the
FCC Rules. These limits are designed to provide reasonable
protection against harmful interference in a residential installation.
This equipment generates, uses and can radiate radio frequency
energy and, if not installed and used in accordance with the
instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference
will not occur in a particular installation.
If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and
on, the user is encouraged to try to correct the interference by one or
more of the following measures.
•Reorient or relocate the receiving antenna.
•Increase the separation between the equipment and receiver.
•Connect the equipment into an outlet on a circuit different from
that to which the receiver is connected.
•Consult the dealer or an experienced radio/television technician
for help.
Modifications: Any modifications made to this device that are not
approved by Kohler Co. may void the authority granted to the user by
the FCC to operate this equipment.
This Class B digital apparatus complies with Canadian ICES-003.
Thank You For Choosing Kohler Company
Thank you for choosing Kohler Company. Your Kohler Company
product reflects the true passion for design, craftsmanship, artistry, and
innovation Kohler Company stands for. We are confident its
dependability and beauty will surpass your highest expectations,
satisfying you for years to come.
All information in this guide is based upon the latest product
1058866-5-D 4 Kohler Co.

Thank You For Choosing Kohler Company (cont.)
information available at the time of publication. At Kohler Company,
we strive to fulfill our mission of improving the level of gracious living
for each person who is touched by our products and services. We
reserve the right to make changes in product characteristics, packaging,
or availability at any time without notice.
Please take a few minutes to review this guide. Pay special attention to
the care and cleaning instructions.
Your Kohler Electronic Valve
Design Features
The valve is designed specifically for use with 1-1/2″(1.9 cm) top spud
toilets as offered by Kohler Company and others.
The valve is supplied with factory preset timing values. No
programming or adjustment is required.
Depending upon use, the ″AA″alkaline batteries can be expected to
last for two to three years before replacement is required.
Flush Operations
The exposed electronic valve provides the following flushing
operations:
An automatic main flush operation: Shortly after the individual
departs the fixture, the valve provides a main flush that lasts for
several seconds.
An automatic 24-hour flush operation: After 24-hours of non-use,
the valve produces a full flush.
Low Battery Indication
The ″AA″alkaline batteries can be expected to last for two to three
years before replacement is required. When the battery reaches a
certain point in its lifetime, the valve announces the low battery
condition by continuously flashing an LED whenever a user is in
range. The batteries are easily replaced as described in the section
″Replace the Batteries″in this guide.
Replacement batteries can be purchased from drugstores or other stores
stocking batteries. The batteries are standard 1.5 volt ″AA″alkaline
cells (four required).
Seasonal Use
Kohler Co. 5 1058866-5-D

Your Kohler Electronic Valve (cont.)
The exposed electronic valve is not designed for operation in freezing
conditions. If freezing conditions are expected, isolate and drain the
valve along with whatever other winterization steps are taken for the
facility.
Mobile Use
The exposed electronic valve is not designed for use in moving
environments such as boats.
Care and Cleaning
For best results, keep the following in mind when caring for your
KOHLER product:
•Use a mild detergent such as liquid dishwashing soap and warm
water for cleaning. Do not use abrasive cleaners that may scratch
or dull the surface.
•Carefully read the cleaner product label to ensure the cleaner is
safe for use on the material.
•Always test your cleaning solution on an inconspicuous area
before applying to the entire surface.
•Do not allow cleaners to sit or soak on the surface.
•Wipe surfaces clean and rinse completely with water immediately
after cleaner application. Rinse and dry any overspray that lands
on nearby surfaces.
•Use a soft, dampened sponge or cloth. Never use an abrasive
material such as a brush or scouring pad to clean surfaces.
For detailed cleaning information and products to consider, visit
www.kohler.com/clean. To order Care & Cleaning information, call
1-800-456-4537 and press 1 for Kohler Products and then 3 for
Literature.
1058866-5-D 6 Kohler Co.

Control Stop Valve Operation
Use a strap wrench to remove the vandal resistant cap from the
control stop valve.
Close the stop valve by turning the valve screw clockwise as far
as it can go.
Open the stop valve by turning the valve screw counterclockwise
as far as it can go.
When done, place the stop cap on the control stop valve and
tighten using a strap wrench.
Wall Flange
Wall Tube
Control Stop
Stop Cap
Kohler Co. 7 1058866-5-D

Remove the DC Sensor
Close the control stop valve (refer to the ″Control Stop Valve
Operation″section).
Using a 3/32″hex head wrench, remove the setscrew from the
valve cap.
Remove the cap by carefully lifting from the valve body.
Disconnect the DC sensor connector to the solenoid by grasping
each side of the connector pair and pulling apart. Do not separate
the connector pair by pulling on the wires.
Position the cap on its side and look inside.
Remove the wedge clip that holds the DC sensor in place inside
the cap.
Turn the cap over and slide the sensor into your hand.
NOTE: The batteries inside the sensor may be considered hazardous
waste. Discard the old sensor and/or batteries in accordance with
any applicable codes.
If replacing the DC sensor, discard the old DC sensor and
batteries.
Cap
Setscrew
DC Sensor
DC Sensor
Connector
Wedge Clip
1058866-5-D 8 Kohler Co.

Replace the Batteries
NOTICE: Do not over tighten the screws. The plastic threads on the
screws can be easily damaged.
NOTE: When purchasing replacement batteries, select four 1.5 volt
AA alkaline batteries.
NOTE: If replacing the sensor, install a battery in the new sensor
unit before installing the sensor.
NOTE: It is not necessary to remove the sensor from the cap to
replace the batteries.
Using a 3/32″hex wrench, remove the two screws from the
bottom of the DC sensor.
Remove the battery holder from the DC sensor.
Using small flat-blade screwdriver (if necessary), carefully pry the
batteries from the battery holder.
NOTE: The batteries may be considered hazardous waste. Discard
the old batteries in accordance with any applicable codes.
Remove and discard the old batteries.
NOTE: Note the polarity stamped on the battery holder for proper
battery placement.
Insert the new batteries into the battery holder.
Reinstall the battery holder into the DC sensor.
DC Sensor
Batteries
Screws
Battery Holder
Kohler Co. 9 1058866-5-D

Install the DC Sensor
NOTICE: Do not pinch or kink the wires between the cap and the
valve body. If the wires are damaged, the unit may not operate.
Hold the cap horizontally with the sensing holes down and align
the DC sensor with the cap.
Slide the DC sensor into the cap until the sensor eyes align with
the holes in the cap. Ensure the sensor wires are not pinched and
the DC sensor connector hangs free.
Slide the wedge clip between the DC sensor and the cap until
snug.
Connect the DC sensor connector to the solenoid connector on the
valve. Ensure that the connector pair is fully seated.
Locate the connector assembly adjacent to the sensor body to
prevent pinching when cap is reinstalled on the valve.
Place the cap on the valve body.
Align the sensor eyes toward the user.
Secure the cap with the setscrew.
Open the control stop valve (refer to the ″Control Stop Valve
Operation″section).
Reinstall the stop cap onto the control stop and tighten firmly
with a strap wrench.
Verify that the valve functions.
Cap
Setscrew
DC Sensor
DC Sensor
Connector
Wedge Clip
1058866-5-D 10 Kohler Co.

Remove the Solenoid
Close the control stop valve (refer to the ″Control Stop Valve
Operation″section).
NOTE: If the unit has not flushed since the stop valve was closed,
the inlet arm may still be pressurized. Use the manual flush button
to release pressure.
Use a 3/32″hex head wrench to remove the setscrew from the
cap.
Remove the cap by lifting from the valve body.
Disconnect the DC sensor connector from the solenoid connector
by pulling the two connectors apart.
Temporarily store the cap and DC sensor assembly in a safe
place.
Use an adjustable wrench to remove the solenoid assembly from
the valve body by unscrewing counterclockwise until the solenoid
is free.
Valve Body
Diaphragm
Cap
DC Sensor
Connector
Solenoid
Assembly
Piston
Cover
Solenoid
Connector
Setscrew
O-Ring
Piston
Retaining Nut
Pin
Spring
Kohler Co. 11 1058866-5-D

Install the Solenoid
NOTICE: Do not overtighten the solenoid, as damage to the
solenoid can occur.
NOTICE: Do not pinch or kink the wires between the cap and the
valve body. If the wires are damaged, the unit may not operate.
Align the solenoid to the hole in the piston cover.
Install the solenoid and tighten with an adjustable wrench by
turning clockwise.
Connect the DC sensor connector to the solenoid connector and
locate the connector assembly next to the sensor body to avoid
pinching.
Place the cap on the valve body and secure with the setscrew.
Open the control stop valve (refer to the ″Control Stop Valve
Operation″section).
Verify that the valve functions.
Valve Body
Diaphragm
Cap
DC Sensor
Connector
Solenoid
Assembly
Piston
Cover
Solenoid
Connector
Setscrew
O-Ring
Piston
Retaining Nut
Pin
Spring
1058866-5-D 12 Kohler Co.

Clean the Screen/Replace the Piston
NOTE: A screen (part of the piston assembly) is provided to keep
debris from clogging the bleed hole. The screen may require
periodic cleaning.
Perform the following steps in order to clean the screen or replace the
piston:
Close the control stop valve (refer to the ″Control Stop Valve
Operation″section).
NOTE: If the unit has not flushed since the stop valve was closed,
the inlet arm may still be pressurized. Use the manual flush button
to release pressure.
Use a 3/32″hex head wrench to remove the setscrew from the
cap.
Remove the cap from the valve body.
Disconnect the DC sensor connector from the solenoid connector
by pulling the connectors apart.
Temporarily store the cap and DC sensor in a safe place.
Use a large adjustable wrench to remove the large retaining nut
from the valve body.
Remove the piston cover by pulling up gently on the solenoid.
Remove the piston from the valve body.
Valve Body
Diaphragm
Cap
DC Sensor
Connector
Solenoid
Assembly
Piston
Cover
Solenoid
Connector
Setscrew
O-Ring
Piston
Retaining Nut
Pin
Spring
Kohler Co. 13 1058866-5-D

Clean the Screen/Replace the Piston (cont.)
NOTE: If required, vinegar may be used in order to remove hard
water deposits.
Using gentle brushing and rinsing, remove all debris from the
screen on the piston.
NOTE: Replace the piston as a complete assembly only. The piston
and screen are not serviced separately.
Insert the piston into the valve body.
Insert the piston cover (with attached solenoid) into the valve
body. Place the O-ring on top of the piston cover.
NOTE: If the nut is not fully tightened, the valve will run
continuously.
Thread the large retaining nut into the valve body and securely
wrench tighten to 59 ft lbs (80 Nm).
Connect the DC sensor connector to the solenoid connector.
Place the cap on the valve body and secure with the setscrew.
Open the control stop valve (refer to the ″Control Stop Valve
Operation″section).
Verify that the valve functions.
1058866-5-D 14 Kohler Co.

Clean/Replace the Diaphragm
NOTICE: Do not pinch or kink the wires between the cap and the
valve body. If the wires are damaged, the unit may not operate.
Close the control stop valve (refer to the ″Control Stop Valve
Operation″section).
NOTE: If the unit has not flushed since the stop valve was closed,
the inlet arm may still be pressurized. Use manual flush button to
release pressure.
Use a 3/32″hex head wrench to remove the setscrew from the
cap.
Remove the cap from the valve body.
Disconnect the DC sensor connector from the solenoid connector
by pulling the connectors apart.
Temporarily store the cap and DC sensor assembly in a safe
place.
Use an adjustable wrench to remove the solenoid.
Remove the diaphragm.
NOTE: Take care not to lose the spring and pin contained within the
solenoid assembly.
Rinse any debris from the diaphragm.
Verify the spring and pin are still in place in the solenoid
assembly.
Valve Body
Diaphragm
Cap
DC Sensor
Connector
Solenoid
Assembly
Piston
Cover
Solenoid
Connector
Setscrew
O-Ring
Piston
Retaining Nut
Pin
Spring
Kohler Co. 15 1058866-5-D

Clean/Replace the Diaphragm (cont.)
If replacing, insert a new diaphragm onto the solenoid assembly.
Thread the solenoid into the piston cover and tighten with an
adjustable wrench.
Verify the piston remains in place.
Install the solenoid/cover assembly into the valve body.
Connect the DC sensor connector to the solenoid connector.
Place the cap on the valve body and install the two screws.
Open the control stop valve (refer to the ″Control Stop Valve
Operation″section).
Verify that the valve functions.
1058866-5-D 16 Kohler Co.

Replace the Vacuum Breaker
Close the control stop valve (refer to the ″Control Stop Valve
Operation″section).
NOTE: If the unit has not flushed since the stop valve was closed,
the inlet arm may still be pressurized. Use manual flush button to
release pressure.
Use a large adjustable wrench to loosen the large tube nut at the
base of the valve body. Let the tube nut slide down the tailpiece.
Gently rotate the top of the valve body away from you while
pulling the top of the tailpiece toward you to separate the
tailpiece from the valve body. The vacuum breaker should now
be exposed for removal.
Remove the loose fiber washer and vacuum breaker from the
tailpiece. Discard both the fiber washer and vacuum breaker.
Install a new vacuum breaker into the tailpiece and place a new
fiber washer on the top of the vacuum breaker.
Gently rotate the tailpiece and valve body back together until the
large tube nut can be threaded onto the bottom of the valve body.
Tighten large tube nut with a large adjustable wrench.
Open the control stop valve (refer to the ″Control Stop Valve
Operation″section).
Verify that the valve functions.
Vacuum
Breaker
Tailpiece
Valve Body
Fiber
Washer
Escutcheon
Coupling Nut
Rubber Seal
Fiber Washer
Large Tube Nut
Control
Stop
Inlet Arm Nut
Kohler Co. 17 1058866-5-D

Replace the Flush Button Assembly
Close the control stop valve (refer to the ″Control Stop Valve
Operation″section).
NOTE: If the unit has not flushed since the stop valve was closed,
the inlet arm may still be pressurized. Use manual flush button to
release pressure.
Carefully place a properly sized spanner wrench or a pair of
needle nose pliers into the holes on the end of the flush button.
Remove the flush button assembly from the valve body.
NOTE: The flush button can only be serviced as a complete
assembly. There are no serviceable internal parts.
Carefully thread a new flush button assembly into the valve body.
Tighten with a spanner wrench or needle nose pliers.
Open the control stop valve (refer to the ″Control Stop Valve
Operation″section).
Verify that the valve functions.
One-Year Limited Warranty
KOHLER plumbing products are warranted to be free of defects in
material and workmanship for one year from date of installation.
Kohler Co. will, at its election, repair, replace or make appropriate
adjustment where Kohler Co. inspection discloses any such defects
Holes
Flush Button
Assembly
Valve Body
1058866-5-D 18 Kohler Co.

One-Year Limited Warranty (cont.)
occurring in normal usage within one (1) year after installation. Kohler
Co. is not responsible for removal or installation costs. Use of in-tank
toilet cleaners will void the warranty.
To obtain warranty service contact Kohler Co. either through your
Dealer, Plumbing Contractor, Home Center or E-tailer, or by writing
Kohler Co., Attn.: Customer Service Department, 444 Highland Drive,
Kohler, WI 53044, USA, or by calling 1-800-4-KOHLER from within the
USA, 1-800-964-5590 from within Canada and 001-877-680-1310 from
within Mexico.
Implied warranties including that of merchantability and fitness for
a particular purpose are expressly limited in duration to the duration
of this warranty. Kohler Co. and/or seller disclaims any liability for
special, incidental or consequential damages.
Some states/provinces do not allow limitations on how long an
implied warranty lasts, or the exclusion or limitation of special,
incidental or consequential damages so these limitations and exclusions
may not apply to you. This warranty gives you specific legal rights.
You may also have other rights which vary from state/province to
state/province.
This is Kohler Co.’s exclusive written warranty.
Troubleshooting
Troubleshooting Tips
•This troubleshooting guide is for general aid only. The steps are
recommended rather than required. This guide should provide an
indication of the probable fault and a suggested correction. For
warranty service, contact your dealer or wholesale distributor.
•For Replacement Parts, call Kohler Customer Service at
1-800-4-KOHLER from 7 AM to 6 PM Central Standard Time or
order online 24 hours at www.kohler.com.
•All work should be performed by properly qualified or licensed
personnel as required by local codes.
Kohler Co. 19 1058866-5-D

Troubleshooting (cont.)
Symptom Probable
Cause
Recommended Action
1. No flow. A. Water not
turned on.
•Verify that the water supply is
turned on and that water
pressure is at a minimum of 20
psi (1.4 bars).
•Verify that the control stop is
fully in the open position.
B. Loose
connection.
•Remove the valve cover.
•Check the connection from the
sensor to the solenoid.
C. Wires are
pinched or
damaged.
•Remove the valve cover.
•Inspect the wires for cuts or
damage.
•If required, order a new
solenoid or a new sensor
assembly.
•Verify that both wires are
tucked inside the cover before
reassembling.
D. Battery life
expired.
•NOTE: The unit requires four
standard 1.5 volt ″AA″alkaline
batteries. This item is not
available from Kohler but can
be purchased at convenience
stores.
•Follow the directions of
″Replace the Batteries″section
in this guide.
E. Solenoid
broken.
•Order a new solenoid service
kit.
F. Sensor
eyes are
scratched.
•Replace the sensor assembly.
Follow the directions of
″Remove the DC Sensor″and
″Install the DC Sensor″sections
in this guide.
G. Bleed hole
in
diaphragm
plugged or
debris on
seal.
•Follow the directions of
″Clean/Replace the
Diaphragm″section in this
guide.
•NOTE: Take care to replace the
diaphragm in its seat before
installing it into the valve body.
1058866-5-D 20 Kohler Co.