Kohler K-1913 User manual

Installation Guide
Rising Wall Bath
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-1913
1128532-2-G

Important Information
WARNING: Risk of injury or property damage. Please read all instructions thoroughly before
beginning installation, including the following requirements.
WARNING: When using electrical products, basic precautions should always be followed,
including the following:
DANGER: Risk of electric shock. Connect only to circuits protected by a Ground-Fault
Circuit-Interrupter (GFCI) or Residual Current Device (RCD).
WARNING: Unauthorized modification may cause unsafe operation and poor performance of
the product. Do not relocate the components, or make other modifications to the system other than
those specified in this document, as this could adversely affect the performance and safe operation.
Kohler Co. shall not be liable under its warranty or otherwise for personal injury or damage caused
by any such unauthorized modification.
Building materials and wiring should be routed away from heat-producing components.
Install to permit access for servicing.
Grounding is required. The unit should be installed by a qualified service representative, and grounded.
WARNING: Risk of electric shock. A licensed electrician should make all electrical connections.
1128532-2-G 2 Kohler Co.

Important Information (cont.)
WARNING: Risk of electric shock. Disconnect power before servicing.
NOTICE: Follow all local plumbing and electrical codes.
Table of Contents
Important Information .............................................................. 2
Tools and Materials ............................................................... 3
Before You Begin ................................................................. 4
Parts Identification ................................................................ 5
Construct the Framing ............................................................. 6
Confirm the Correct Cutout .......................................................... 8
Install the Drain Lines and Rough Plumbing ............................................. 9
Remove the Shipping Brackets ...................................................... 11
Remove the Door ................................................................ 12
Remove the Pulley Assemblies and Mounting Brackets .................................... 14
Remove the Receptor Tray ......................................................... 16
Disconnect the Components ........................................................ 17
Position the Bath ................................................................ 18
Level and Secure the Bath ......................................................... 20
Attach the Water Supply to the Accumulator ............................................ 21
Install the Receptor Tray, and Connect the Drains ........................................ 22
Install the Mounting Brackets and Pulley Assemblies ...................................... 24
Install the Door ................................................................. 26
Attach the Counterweights ......................................................... 27
Connect the Components .......................................................... 29
Adjust the Bath Door ............................................................. 30
Seal/Drain System Electrical Connections .............................................. 32
Heated Surface Electrical Connections (if equipped) ...................................... 34
Confirm Heated Surface Operation (if equipped) ......................................... 35
Install the Trim Caps and Access Panel ............................................... 36
Install the Finished Wall ........................................................... 38
Troubleshooting ................................................................. 38
Tools and Materials
Hex Wrenches
Removable
Bolt Adhesive 7/16", 9/16" and 7/8" Open-end wrenches
• Crowbar or small
pry bar
• Metal Shims
• Masking Tape
• Pencil
• Drop cloth or
protective material
• Standard wood working tools
and materials
Plus:
Silicone
Sealant
Kohler Co. 3 1128532-2-G

Before You Begin
NOTICE: Risk of personal injury. Handle the bath and frame carefully. Some edges may be sharp or
rough.
NOTICE: Risk of product damage. Handle the bath and frame carefully. The bath will break or
malfunction if handled carelessly.
NOTICE: Risk of product damage. Do not support the weight of the bath by the perimeter of the rim. To
avoid damage to the product, support the bath by its base or feet.
NOTICE: Risk of product damage and personal injury. Due to the weight and installation difficulty of
the product, Kohler Co. recommends that two people perform this installation. There are several
installation sequences that are very difficult if performed alone.
IMPORTANT! Use care when removing screws. All screws will be reused unless otherwise indicated. Do
not strip the heads.
IMPORTANT! Do not cut or remove any cable ties unless instructed. They are used to hold critical parts
in place, and are designed to stay in place throughout the installation.
IMPORTANT! If the installation site is in an area where frequent or prolonged power outages occur,
Kohler Co. recommends that a minimum 350 VA Uninterruptible Power Supply (UPS) be installed as a
backup power source to the bath controller. The UPS will ensure that door functionality is not
compromised in the event of a power outage.
Follow all local plumbing and electrical codes.
Depending on the installation, it may be necessary to disassemble parts of the bath to pass
through all doorways, hallways, and stairways between the staging area and the bathroom. There
will be several points in this installation where the installer will be asked if further disassembly
is required. All adjustments have been made at the factory. Installation time is less for jobs
requiring little or no disassembly.
IMPORTANT! Save all hardware. If disassembly is required, save and organize all hardware. Hardware
will be reused unless otherwise specified.
There are supplemental installation instructions located on the back of the access panel.
This bath requires three drains with separate P-traps. Allow for three drains connecting at the
stack in your installation.
The installation instructions outline the only parts that need to be removed or disassembled during
the installation process. Although many parts may appear to be removable, do not disassemble
anything unless instructed.
Unpack the bath in an open area.
Inspect the unit for damage and make sure parts such as counterweights, access panel, and trim
caps are accounted for. The unit shown in this manual has a left-hand drain and may appear
different than the unit you have purchased.
1128532-2-G 4 Kohler Co.

Parts Identification
Fill Spout/Accumulator
Trim Cap
Wall (RH)
Trim Cap
Wall (LH)
Roller Assembly (RH)
Pulley (LH)
Assembly
(includes limit
switch and
bumper)
Bumper
Mounting
Bracket
Access Panel
Support
Frame
Pulley Assembly (RH)
(includes limit switch and bumper)
Mounting Bracket
Power Connection for Door
(always opposite footwell drain side)
Receptor Tray
Bath
(Left Hand Drain shown)
Counterweight
Counterweight
Roller
Assembly
(LH)
Primary Footwell
Bath Drain
Second (Sidewall)
Drain Opening
Grab Bar
Controller
(Power Supply)
Door Assembly
(includes electronics
and brush seal)
Trim Cap Cover (LH)
Guide Tool
Trim Cap
Cover (RH)
Receptor Tray
Drain
Drain Valve for
Secondary Drain
Accumulator
Counterweight Guide
Product ID Label
Kohler Co. 5 1128532-2-G

1. Construct the Framing
All Installations
NOTICE: Measure your product for site preparation. Note the model number located on the blower
motor, then visit the product page at www.kohler.com for more information.
NOTICE: Adequate floor support must be provided.
NOTICE: Do not support the weight of the bath by the perimeter of the rim. To avoid damage to the
product, support the bath by its base or feet.
IMPORTANT! This product requires three 1-1/2″diameter drain outlets, three P-traps, and three separate
lines to the stack. In an ideal configuration, none of the drains should be combined, as performance may
suffer and the potential for backflow will increase. If required, the two bathing vessel drains (#1 and #2 in
diagram) may be combined downstream from the P-traps into a single 3″diameter drain line.
IMPORTANT! The drain for the receptor tray (#3) requires a dedicated P-trap and stack connection.
Follow all local plumbing and electrical codes.
Leave the stud pocket open and do not install the finished wall until after the bath has been
installed. This installation is best done with access from the backside of the studs, particularly from
each side.
NOTICE: Follow all local plumbing and electrical codes.
If the installation site is in an area where frequent or prolonged power outages occur, Kohler Co.
recommends that a minimum 350 VA Uninteruptable Power Source (UPS) be installed as a backup
power source for the bath controller. This will ensure the door will open in the event of a power
outage.
Construct 2x4 or 2x6 stud
framing according to
the roughing-in information.
Position the rough plumbing.
Verify that the subfloor offers adequate support, and is flat and level.
Drain Access
Plumbing configuration
may vary.
To Accumulator
To Handshower
Hot
Cold
Floor Plan for Left-Hand Drain Model
16"
(406 mm)
10" (254 mm)
24-1/2"
(622 mm)
3-1/2"
(89 mm)
(LH) Drain
Cutout
7-3/4" (197 mm)
3-7/8"
(98 mm)
10" (254 mm)
10" (254 mm)
Drain Cutout
Three Drain Cutouts (required)
Drain
Cutout
12
3
5-1/2" (140 mm)
30" (762 mm)
33-1/4"
(845 mm)
Front Edge of
Receptor Tray
GFCI Protected Outlet
(Opposite Side of
Accumulator Supply)
1
(RH) Drain Cutout
9-3/4"
(248 mm)
3-7/8" (98 mm
1128532-2-G 6 Kohler Co.

Construct the Framing (cont.)
Install a 120 V, 15 A, 60 Hz electrical outlet protected by a GFCI or RCD. The outlet must be located
on the side of the bath opposite the footwell drain outlet, within 24″(610 mm) of the controller).
Units with the heated surface feature will require a second electrical outlet within 24″(610 mm) of
the heated surface controller.
NOTE: Drain #1 is the sidewall drain/valve outlet. Drain #2 is the overflow and footwell drain outlet.
Drain #3 is the receptor tray drain outlet.
NOTE: Three drains are required for this product. Drains #1 and #2 require a 10″(254 mm) x 10″(254
mm) cutout.
NOTE: Drain #3, the receptor tray drain, requires a 10″(254 mm) x 10″(254 mm) cutout if access from
below is available. If above-the floor access is required to make the connections, a 10″(254 mm) x 16″(406
mm) cutout is required to allow access. The 10″(254 mm) wide cutout is critical to prevent subfloor
contact with the drain area of the receptor tray. If the subfloor and drain come into contact, enlarge the
cutout as needed or raise the bath using the adjustable feet. The receptor tray must be level and the drain
must rest comfortably through the subfloor.
Make sure the flooring offers adequate support for the bath, and verify that the subfloor is flat and
level.
The bath should be installed in an alcove installation. Construct a 2x4 or 2x6 frame.
Position the plumbing. Cap the supplies, and check for leaks.
Provide adequate ventilation and at least 15 cubic feet (.4 cubic meters) of open air space for cooling
the motor and supplying sufficient air to the blower. Do not install the blower motor closer than 1″
(25 mm) to the wall or other objects.
IMPORTANT! Use the chart below as a general guideline. Every installation varies. Hallways, corners,
stairways and other obstacles should be taken into account when determining how much disassembly is
required. Avoid unnecessary disassembly when possible.
Door Opening Recommended Installation Action
Larger than 33″(838 mm) No disassembly is required. Skip sections 4
through 8.
31″(787 mm) to 33″(838 mm) Remove the door from the bath and the
receptor from the support frame.
30″(762 mm) to 31″(787 mm) Full disassembly is likely. Follow all steps in
this manual.
Less than 30″(762 mm) The door open needs to be enlarged to a
minimum of 31″(762 mm).
Kohler Co. 7 1128532-2-G

2. Confirm the Correct Cutout
All Installations
NOTE: Drain #3, the receptor tray drain, requires a 10″(254 mm) x 10″(254 mm) cutout if access from
below is available. If above-the floor access is required to make the connections, a 10″(254 mm) x 16″(406
mm) cutout is required to allow access. The 10″(254 mm) wide cutout is critical to prevent subfloor
contact with the drain area of the receptor tray. If the subfloor and drain come into contact, enlarge the
cutout as needed or raise the bath using the adjustable feet. The receptor tray must be level and the drain
must rest comfortably through the subfloor.
Measure the cutout to confirm it is a minimum of 10″(254 mm) wide and 16″(406 mm) long.
Study the illustrations at the right. When the cutout is the correct size, the drain outlet on the
receptor tray and the surrounding material will not come in contact with the subfloor. The drain
outlet will protrude into the cutout when installed.
If the cutout is too small, the receptor tray will be too high. The counterweights will strike the
receptor tray when the door is raised and the door seals will not inflate.
16"
(406 mm)
10"
(254 mm)
Receptor Drain Cutout
Front Edge of
Receptor Tray
16" (406 mm)
10" (254 mm)
1/4" (6 mm)
Subfloor
1128532-2-G 8 Kohler Co.

3. Install the Drain Lines and Rough Plumbing
All Installations
Plumbing Access Considerations
Confirm adequate mounting and connection space exists for the faucet specified for your
installation.
Confirm adequate clearance for three P-traps.
If the unit is installed on a slab at a corner of the outside walls: Make connections to the
accessible end, or provide access to the plumbing connections if not able to do so through the front
access panel. Check the P-trap clearance for drains #1 and #2.
If the unit is installed on a slab back-to-back against the outside walls: Plan to provide adequate
access to the plumbing connections. Limited access is available through the access panel. Check the
P-trap clearance for drains #1 and #2.
When the unit is installed where the drain connections are accessible from below: Connections
can usually be made from underneath the unit.
Install the Rough Plumbing
IMPORTANT! This product requires three 1-1/2″diameter drain outlets, three P-traps, and three separate
lines to the stack. In an ideal configuration, none of the drains should be combined, as performance may
suffer and the potential for backflow will increase. If desired, the two bathing vessel drains (#1 and #2)
may be combined downstream from the P-traps into a single 3″or larger drain line.
Install the plumbing lines following the valve and trim manufacturer’s instructions. Recommended
supply fittings and locations are shown above.
Use 3/4″valves for optimal fill time.
Flush out the drains.
Receptor Tray Drain
Mixing Valve
Transfer Valve
To
Accumulator
To
Handshower
Install the drain lines.
Slotted
Overflow Drain
Install water accumulator line.
Accumulator
Fitting (supplied)
(not supplied)
3/4" NPT
Recommended Plumbing Configuration for Left-Hand Models
46" (1168 mm) From Subfloor Recommended
Sidewall
Bath Drain 3
2
1
Kohler Co. 9 1128532-2-G

Install the Drain Lines and Rough Plumbing (cont.)
Install the receptor tray drain line and P-trap.
Install the sidewall drain line and P-trap.
Install the slotted overflow drain line and P-trap.
Install the water supply line which will connect to the accumulator. Do not connect at this time.
1128532-2-G 10 Kohler Co.

4. Remove the Shipping Brackets
All Installations
NOTE: Refer to the diagram in the ″Product Identification″section to identify major components when
needed.
Remove and discard the shipping brackets. Take care not to strip the screw heads.
If the bath can be moved into place without disassembling it, go directly to the ″Position
the Bath″section.
Right
Shipping
Bracket
Bracket
Location
Left Shipping
Bracket
Bracket
Location
Kohler Co. 11 1128532-2-G

5. Remove the Door
Installations Requiring Disassembly Only
Disassembly Checkpoint #1
The steps in this section may not be necessary. Make sure removing the door is required.
The bath can sometimes be moved into place fully assembled.
If the bath can be moved into place without performing these steps, go directly to
″Position the Bath.″
Remove the Door
CAUTION: The door will be heavy and difficult to lift until the counterweights are installed.
Bath Door
Bottom View of Door Opposite Drain
Remove the door.
2
1
Disconnect door
power cord.
Remove roller assembly.
Bottom View of Door Opposite Drain
Remove screw.
Drain End
Side Opposite
Drain
Rubber
Door Stop
1128532-2-G 12 Kohler Co.

Remove the Door (cont.)
IMPORTANT! Cover the receptor tray with protective material to avoid damaging it.
Raise and latch the door.
Have the second installer hold the door up and brace it using a 2x4 under the door, with the bottom
end of the 2x4 positioned on the subfloor (not the receptor tray).
CAUTION: Risk of personal injury. When the screw is removed from the roller assembly plate,
friction is the only force holding the roller assembly in place. To avoid injury or damage to the
bath, make sure the roller assembly does not fall.
On the side of the door opposite the drain and fill spout, carefully remove the screw nearest the
rubber door stop securing the cover plate and roller assembly on the bottom of the door. Take care
not to strip the screw heads.
Slide the roller assembly down 2″(51 mm) to 4″(102 mm). If it sticks, gently pry or tap the roller
assembly from above to help lower it.
Unplug the power cord from the inside of the door by reaching up into the recess that the plate
covered.
Remove the power cord from the door, then slide the roller assembly all the way down, leaving it
intact. Further disassembly of the cord from the roller assembly is possible but typically not needed.
IMPORTANT! Do not cut the cable ties securing the power cord to the roller assembly.
NOTE: The power cord is held in place by a bracket at the base of the roller assembly. Do not remove the
bracket unless necessary.
Rest the roller assembly on the receptor tray with the power cord attached.
Remove the 2x4 while supporting the door.
NOTE: The roller assembly on the drain side of the door will remain attached.
Squeeze the door handle and pivot the door out of the track on the side opposite the drain.
Remove the door and carefully set it aside.
Kohler Co. 13 1128532-2-G

6. Remove the Pulley Assemblies and Mounting Brackets
Installations Requiring Disassembly Only
Disassembly Checkpoint #2
The steps below may not be necessary. Make sure removing the pulley assemblies,
mounting brackets, and/or receptor tray is required. The bath can usually be moved into
place after the door is removed.
If the bath can be moved into place without further disassembly, go directly to the
″Position the Bath″section.
IMPORTANT! Save and organize all screws and hardware. All parts will be reused.
Remove the Pulley Assemblies
Pull the limit switch wires at the top of each pulley through the opening in the bath until the
connector appears, then disconnect them.
Remove the four red screws from the drain side of the bath. Take care not to strip the screw heads.
Remove the pulley assembly from the drain side of the bath.
Remove the four red screws from the other side of the bath. Take care not to strip the screw heads.
Remove the pulley assembly from the other side of the bath.
Remove the Mounting Bracket
Remove the four blue screws from the drain side of the bath. Take care not to strip the screw heads.
Remove the mounting bracket from the drain side of the bath.
Remove Pulley Assemblies Remove Mounting Brackets
Red Screw
Blue
Screw
Pulley
Assembly
Mounting
Brackets
Limit Switch
Connector
1128532-2-G 14 Kohler Co.

Remove the Pulley Assemblies and Mounting Brackets (cont.)
Remove the four blue screws from the other side of the bath. Take care not to strip the screw heads.
Remove the mounting bracket from the other side of the bath.
Kohler Co. 15 1128532-2-G

7. Remove the Receptor Tray
Installations Requiring Disassembly Only
NOTE: Take care not to scratch the receptor tray or strip the screw heads when performing these steps.
Remove each of the screws securing the receptor tray to the frame. Take care not to strip the screw
heads.
Carefully remove the receptor tray by rotating it down and out away from the counterweight
guides.
Set the receptor tray aside in a safe place.
Support
Frame
Receptor Tray
Board
Screw
1128532-2-G 16 Kohler Co.

8. Disconnect the Components
Installations Requiring Disassembly Only
Disassembly Checkpoint #3
The steps below may not be necessary. It is only required for doorways less than 31″(787
mm). Make sure removing the bath from the frame is required. The bath likely can be
moved into place while attached to the frame.
If the bath can be moved into place without further disassembly, go directly to the
″Position the Bath″section.
IMPORTANT! Save and organize all screws and hardware. All parts will be reused.
Disconnect the water inlet from the drain valve by loosening the nut. Save the O-ring.
Disconnect the level sensing wires at the controller.
Disconnect the limit switch wires at the controller.
Disconnect the door power wire at the controller.
Disconnect the Bath from the Frame
IMPORTANT! Be careful not to strip or damage the screws when removing them. When the bath is
reattached they will be reused, as will the original holes in each of the wood blocks.
Disassemble the bath from the support frame at the four brackets by removing the two screws.
Carefully lift the bath clear of the frame and set it aside.
Temporarily secure any loose wires and protect them from being damaged.
Nut
Remove all screws
from (4) brackets.
Disconnect level sensing wires.
Bracket
Wood Block
J1
J2
J3
J4
J5
J6
and
Disconnect limit switch wires.
Disconnect drain valve power.
Disconnect door power.
Water Inlet
Power Cord
Drain Valve
Controller
Open
J7
Kohler Co. 17 1128532-2-G

9. Position the Bath
All Installations
IMPORTANT! If the installation site is in an area where frequent or prolonged power outages occur,
Kohler Co. recommends that a minimum 350 VA Uninterruptible Power Supply (UPS) be installed as a
backup power source for the bath controller.
IMPORTANT! If a handshower is being installed, follow the instructions packed with the handshower.
Make sure the handshower installation conforms to all applicable backflow prevention requirements.
Install any valving or accessories.
Adjust each of the six leveling feet until they extend 1/4″(6 mm) to 1/2″(13 mm) from the base of
the frame.
Install the grab bar and slotted overflow drain following their installation instructions. If the PVC
pipe included with the drain is too short, cut a new length using commonly available 1-1/2″
Schedule 40 PVC pipe.
If a UPS backup power supply is being installed to the controller, install it now following the UPS
manufacturer’s instructions. Do not connect the power source to the UPS at this time.
Reassemble the Bath (if disassembled)
NOTE: The following steps are not required if you did not disassemble the bath. If the bath has not been
disassembled, proceed to ″Move the Bath Into the Stud Pocket″steps below.
Cover the area of the bathroom floor where the bath will be reassembled with protective material.
Move the bath and support frame from the staging area to the installation area.
If the bath was removed from the frame, carefully position and center the bath on the frame.
Attach the bath to the support frame.
Bracket
Wood Block (4)
Bottom View
Leveling Foot Locations (6)
Install the bath to the frame.
Align all of the holes.
Controller
1128532-2-G 18 Kohler Co.

Position the Bath (cont.)
Make sure each of the wood support feet are positioned correctly in the corresponding bracket, with
the screw holes aligned.
Secure each of the wood blocks to the brackets using the original screws and holes.
Move the Bath Into the Stud Pocket
Install the outlet drain in the footwell to the bath following the instructions supplied with the drain.
Move the assembled bath into the final installation position in the stud pocket.
Kohler Co. 19 1128532-2-G

10. Level and Secure the Bath
All Installations
IMPORTANT! Do not anchor the bath to the stud pocket until instructed to do so.
IMPORTANT! Do not level the bath with the counterweights installed. The counterweights and door
assembly could cause the bath to shift, causing leveling to be incorrect.
Install metal shims under each of the leveling feet to protect the floor.
Check for level on the back edge and each side of the bath as shown.
Adjust the leveling feet as needed to level the bath.
Recheck for level.
Repeat until the bath is level.
Check each of the leveling feet and confirm they make firm contact with the metal shims and
subfloor.
Secure the bath to the studs with nails or screws, using the nailing-in flange.
Leveling Foot Locations
Leveling Foot Locations
Bottom View
Stud
Nail furring strips
to the studs.
Drill a small hole
through the nailing-in
flange at each stud.
Use #6 large-head
galvanized nails to
secure the nailing-in
flange to the studs.
1128532-2-G 20 Kohler Co.