Kohler Mira Evoco Series User manual

11478624-W2-A
Mira Evoco
For SPARES,
ADVICE or REPAIRS
please call us free
on 0800 001 4040
(UK only)
These instructions must be left with the user
Affix Sticker Here
Model Name:
Product Code:
Date of Manufacture:
Installation and User Guide
(Please keep these details safe as you will need them when registering your
product guarantee. Your guarantee information is included in this guide.)
Evoco Dual
Evoco Triple

2
1478624-W2-A
PLEASE observe the following To reduce the risk of injury:
Installing the Shower
1. Installation of the shower must be carried out in accordance with
these instructions by qualied, competent personnel. Read all
instructions before installing the shower.
2. DO NOT install the shower where it may be exposed to freezing
conditions. Ensure that any pipework that could become frozen
is properly insulated.
3. DO NOT perform any unspecied modications to the shower
or its accessories. When servicing only use genuine Kohler Mira
replacement parts.
4. If the shower is dismantled during installation or servicing then,
upon completion, an inspection must be made to ensure all
connections are tight and that there are no leaks.
Using the Shower
5. The shower must be operated and maintained in accordance with
the requirements of this guide. Make sure you fully understand
how to operate the shower before use, read all instructions and
retain this guide for future reference.
6. DO NOT switch the shower on if there is a possibility that the water
in the shower unit or ttings is frozen.
Safety Information
WARNING ! This shower can deliver scalding temperatures. For
continued safe operation, follow all instructions, warnings and
cautions contained in this guide and on or inside the shower.
Periodic maintenance may be required to keep the product in
good working order.
The function of a thermostatic mixing valve is to deliver water
consistently at a safe temperature. In keeping with every other
mechanism, it cannot be considered as functionally infallible and
as such, cannot totally replace a supervisor’s vigilance where that
is necessary. Provided it is installed, commissioned, operated
and maintained within manufacturers recommendations, the
risk of failure, if not eliminated, is reduced to the minimum
achievable.

31478624-W2-A
7. Children younger than 3 years should not use this shower. Children
3 years to under 8 years should only use this shower under
continuous supervision. Children aged 8 years and above and
persons with reduced physical, sensory or mental capabilities or
lack of experience or knowledge can use the shower if they are
given supervision or instruction concerning use of the appliance
in a safe way and understand the hazards involved.
8. Anyone who may have di󰀩culty understanding or operating the
controls of any shower should be attended whilst showering.
Particular consideration should be given to the young, the elderly,
the inrm or anyone inexperienced in the correct operation of the
controls.
9. DO NOT allow children to clean or perform any user maintenance
to the shower unit without supervision.
10. Always check the water temperature is safe before entering the
shower.
11. DO NOT adjust the temperature control rapidly while using the
shower.
12. Use caution when altering the water temperature while in use,
always check the temperature before continuing to shower.
13. DO NOT switch the shower o󰀨 and back on while standing in the
water ow.
14. DO NOT t any form of outlet ow control. Only Mira recommended
outlet ttings should be used.
15. The showerhead must be descaled regularly. Any blockage of the
showerhead or hose may a󰀨ect showering performance.
16. The water supplies to this product must be isolated if the product is
not to be used for a long period of time. If the product or pipework
is at risk of freezing during this period they should also be drained
of water.
17. When this product has reached the end of its serviceable life, it
should be disposed of in a safe manner, in accordance with current
local authority recycling, or waste disposal policy.
18. This appliance is intended to be permanently connected to the
water supply and not connected using a exible hose set.

4
1478624-W2-A
Introduction
Thank you for choosing a Mira shower. To enjoy the full potential of your new shower, please
take time to read this guide thoroughly, and keep it handy for future reference. Products
manufactured by Kohler Mira Ltd are designed to be safe, provided that they are installed,
used and maintained in good working order, in accordance with our instructions and
recommendations.
Follow all warnings, cautions and instructions contained in this guide, and on, or inside
the shower. This guide is also available in digital format from our website or by contacting
customer services.
Type 2 Valves
This product has been certied as a Type 2 valve. It also complies with the Water Supply
(water ttings) regulations 1999. For further information on Type 2 Valves, refer to the TMV2
Requirements Manual (available to view or download on our website www.mirashowers.com).
The approved designation for this product is listed in the table below.
Product Code Model Name Colour Type 2 Designation
B12A Dual Outlet Shower
Chrome, Matt
Black & Brushed
Nickel
HP-S
B12AL LIT Dual Outlet Shower
B12B Dual Outlet Bathll
B12BL LIT Dual Outlet Bathll
B12CL LIT Triple Outlet Bathll
Guarantee
For domestic installations, Mira Showers guarantee the product against any defect in
materials or workmanship for a period of ve years from the date of purchase (shower ttings
for one year).
For non-domestic installations, Mira Showers guarantee the product against any defect in
materials or workmanship for a period of one year from the date of purchase.
Failure to follow the instructions provided with the shower will invalidate the guarantee.
For Terms and Conditions refer to the 'Activating Your Free Guarantee and Customer
Service' pages.
Design Registration: 007749684-0005, 007749684-0006, 007749684-0007,
007749684-0008, 007749684-0009
Design Registration and Patents
Domestic Light Commercial 
Heavy Commercial Healthcare 
Recommended Usage

51478624-W2-A
Mira PBBI Evoco
For SPARES,
ADVICE or REPAIRS
please call us free
on 0800 001 4040
(UK only)
These instructions must be left with the user
Affix Sticker Here
Model Name:
Product Code:
Date of Manufacture:
Installation and User Guide
(Please keep these details safe as you will need them when registering your
product guarantee.Your guarantee information is included in this guide.)
1478524-W2-A
Evoco Dual
Evoco Triple
Pack Contents
X1 qX1 q
X1 q
X1 q
X1 q
X1 q
X1 q
X1 q
X3 q
X1 q
X1 q
X1 q
X1 q
X1 q
X2 q
X4 qX3 q
X3 q
X1 qX2 qX1 q
X1 q
X4 qX4 q
X1 q
X2 q
X6 q
Important! Some parts may di󰀨er from the below depending on product purchased.
X1 q

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1478624-W2-A
X1 q
X1 q
X1 q
Additional Items Required (Not Supplied)
X1 q
Waterproof Tanking Adhesive
(see ‘Installation - General’
for details) q
Push Fit Stop End
(suitable for 15mm
copper pipe) q
Silicone Sealant q
X1 q
X1 q
Important! Some parts may di󰀨er from the below depending on product purchased.

71478624-W2-A
• For safety and comfort the thermostat will shut o󰀨 the mixing valve within
2 Seconds if either supply fails (achieved only if the blend temperature has
a minimum di󰀨erential of 12°C from either supply temperature).
• Important! This product uses 15mm Push t connectors and is not suitable
for any other pipe sizes. We recommend the use of copper pipework.
• Warning! This product does not allow for reversed inlets and will deliver
dangerously unstable temperatures if tted incorrectly.
Thermostatic Shut-down
Specications
Pressures
Maximum Static Pressure 1000 kPa (10 bar)
Maximum Maintained Pressure 500 kPa (5 bar)
Minimum Maintained Pressure
(Gas Water Heater)
100 kPa (1 bar)
(for optimum performance supplies should be
nominally equal)
Minimum Maintained Pressure
(Gravity System)
10 kPa (0.1 bar),
(0.1 bar = 1 Metre head from cold tank base to shower
handset outlet)
Temperatures
Close temperature control 20°C - 50°C
Optimum Thermostatic Control
Range
35°C to 45°C
(achieved with supplies of 15°C cold, 65°C hot and
nominally equal pressures)
Recommended Hot Supply 60°C to 65°C
Minimum Hot Water Supply Tem-
perature
55°C (Note: The mixing valve can operate
at temperatures up to 85°C for short periods
without damage. However for safety reasons it
is recommended that the maximum hot water
temperature is limited to 65°C). Warm up feature
may not work if your hot inlet temp is below 55°C.
Minimum Recommended
Di󰀨erential between Hot Supply
and Outlet Temperature
12°C at desired ow rates
Cold Water Range 1 - 25°C
Plumbing Connections
Hot: Left 15mm Push Fit
Cold: Right 15mm Push Fit
Outlet: Dual/Triple Outlet = RAC: 15mm Push Fit
Overhead and Bathller: 15mm Push Fit

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Warning! This product does not allow for reversed inlets and will deliver
unstable temperatures if tted incorrectly.
Installation
General
1. Installation of the shower must be carried out in accordance with these
instructions by qualied, competent personnel.
2. The plumbing installation must comply with all national or local water regulations
and all relevant building regulations, or any particular regulation or practice
specied by the local water supply company.
3. Make sure all pressures and temperatures comply with the requirements of the
shower. See ‘Specications’. For Type 2 Valves, refer to supply conditions
given in the TMV2 Requirements Manual (this is available to view or
download from our website www.mirashowers.com).
4. Full bore/non restrictive servicing valves must be tted in a readily accessible
position adjacent to the shower to facilitate maintenance of the shower.
DO NOT use a valve with a loose washer plate (jumper) as this can lead to a
build up of static pressure.
5. The product contains built in check valves. DO NOT install inlet check valves
as this can lead to a build up of static pressure and potential product damage
and leaking.
6. DO NOT apply excessive force to plumbing connections; always provide
mechanical support when making plumbing connections. Any soldered joints
should be made before connecting the shower.
7. Pipework dead-legs should be kept to a minimum.
8. DO NOT install the shower unit in a position where access for maintenance is
restricted.
9. The shower must be tted to a waterproof, at and even wall surface.
Decorative and mosaic tiles are not recommended in the area where the shower
is to be installed, as they may cause problems with sealing around the valve
and also e󰀨ect product operation.
10. The wall cavity must provide su󰀩cient support for the shower unit. The 4 cavity
xing screws (No. 10 x 2”) and wall plugs supplied are suitable for most solid
wall and stud partition installations. Use all 4 xing points to secure the shower
unit, be sure to use xings appropriate for the chosen wall structure. The front
concealing plate must be tted to a waterproof, at and even wall surface.
Suitable Plumbing Installations
The Thermostatic Mixer can be installed with all systems with balanced pressures.
Mixed gravity and mains supplies are not recommended.

91478624-W2-A
11. Position the shower unit where the controls are at a convenient height for the
user. Position the showerhead so that the water sprays in line with the bath or
across the opening of a shower cubicle. The installation must not cause the
shower hose to be kinked during normal use.
12. A suitable waterproof shower tanking adhesive is required for the fabric wall
seal supplied. We recommend a liquid based plumbing type to be applied with
a paint brush, available from tile / builder merchants. A su󰀩cient amount is
required for coating the fabric seal twice during the installation.
13. The water supplies to this product should be isolated if the product is not to be
used for a long period of time. If the product or pipework is at risk of freezing
during this period they should also be drained of water.
14. The position of the shower and shower ttings must provide a minimum air
gap of 25 mm between the showerhead and the spill over level of any bath,
shower tray or basin. There must be a minimum distance of 30 mm between
the showerhead and the spill over lever of any toilet, bidet or other appliance
with a Fluid Category 5 backow risk.
Zone of
Backflow
Risk
30 mm
Minimum
T
oilet or Bidet
FC5
Hand Basin
FC3
Bath or Shower
Tray FC3
Shower
Unit
25 mm
Minimum
25 mm Minimum
Note : There will be occasions when the hose retaining ring will not provide
a suitable solution for Fluid Category 3 installations. In these instances an
outlet double checkvalve must be tted, this will increase the required
supply pressure typically by 10 kPa (0.1 bar). Double checkvalves tted in
the inlet supply to the appliance cause a pressure build up, which a󰀨ects
the maximum static inlet pressure for the appliance and must not be tted.
For Fluid Category 5, double checkvalves are not suitable.

10
1478624-W2-A
Determine the pipework route. All pipework to the product must be clipped and
supported to prevent movement and pipe noise due to any pulse pressures.
Position the outlet so that the shower hose will not obstruct the control handle and
the xing screws will avoid the outlet pipe.
Decide on a suitable position for the shower unit and ttings.
Installation
Warning! Isolate the water supplies before installing the shower.
Warning! This product does not allow for reversed inlets and will deliver
dangerously unstable temperatures if tted incorrectly.
Evoco Triple Evoco Dual
OR
Shower
Fittings
Water Inlets
Overhead
Bath
Filler
HOT COLD
Outlet
Pipe
Water Inlets
HOT COLD
Shower
Fittings
Overhead
Bath
Filler
Outlet
Pipe
Building In
Box
Building In
Box

11 1478624-W2-A
Plan xing method for product in wall cavity.
Note: For two outlet version, the top outlet will be blocked o󰀨. DO NOT
remove the outlet cap on the box.
Note: For wall depths greater than 90mm, please use the noggin mounts or
place a wood panel behind the product.
Stud Partition Noggin Mounting Method
(x4)
Rear Fixing Mounting Method
Noggin
Mount
Noggin
Mount
Noggin
(x2)
Copper
pipes into
push t
connectors
Copper
pipes into
push t
connectors
Clamp
Clamp
Noggin
Mount
Noggin
Mount
Clearance
for outlet
plug or third
outlet
Noggin
OR
OR
(x4)
Solid Wall Rear Fixing
36mm
Copper
pipes into
push t
connectors
Copper pipes
into push t
connectors
Copper
pipes into
push t
connectors
195-200mm
Clamp

12
1478624-W2-A
1477011-6-A
Finished Wall
Between Max and Min
Max
Min
Finished Wall Thickness
(e.g. tile and adhesive)
Wall Cutout
Depth ‘X’
4mm 86 - 66mm
6mm 84 - 64mm
8mm 82 - 62mm
10mm 80 - 60mm
12mm 78 - 58mm
14mm 76 - 56mm
16mm 74 - 55mm
Create a suitable cavity for the Building In Box and the pipework.
Cut away the plasterboard and/or brick work to the required depth.
For stud partitions depth ‘X’ refers to the distance from the rear mounting e.g. timber
noggin, to the front of the wall (before tiling).
Secure the Building in Box into the cavity. Use a 6 mm diameter drill to suit the wall
plugs supplied for solid walls. DO NOT use wall plugs when securing to noggin or
wooden panel.
Important! This depth ‘X’ will depend on the nished wall thickness e.g. tiles
or facia board. Refer to the table for this measurement.
Minimum
Finished
Wall Surface
Maximum
Finished
Wall Surface
Finished
Wall
Surface
Rear
Mounting
Finished
Wall
Thickness
Depth (X)
Finished
Wall
Surface
Noggin
Mount
Finished
Wall
Thickness
Depth (X)

13 1478624-W2-A
Evoco Dual
Blanking
Plugs
Cap
Push and hold the collet before removing the blanking plugs.
Important! DO NOT remove the cap for Dual Outlet product.
Push t the inlet and outlet pipework into the Building In Box. Hold the box securely
while xing the pipework. Insert the locking clips (supplied) to secure the pipes in place.
COLDHOT
Important! Cut the pipe using a pipe cutter only to ensure the seals
are not damaged when the pipe is inserted. Remove all burrs.
Note: Grease sachets are supplied and a small amount should be applied to
the end of the pipe to aid insertion.
Warning! Mark each piece of pipework at 36mm. The push-t connections
contain seals (x2). Make sure you push the pipes in the full 36mm as indicated
to completely engage (you should feel the pipes push past both seals when
you do this). There is a risk of leaking if pipe work not fully pushed into the
connector.
Locking
Clips
Insert locking
clip here
Evoco Triple
Blanking
Plugs
Blanking
Plug
36mm
Collet

14
1478624-W2-A
Fit the outlet pipework ready for connection to either a right angle connector for a
handset, bath (adjustable tting), or a shower arm for a xed spray head (rigid tting).
Ensure adequate pipe is extruding from the wall for each of the outlets.
Refer to the shroud button icons for the outlet conguration. If incorrectly installed
please refer to button replacement section.
Evoco Dual
OR
Shower
Fittings
Water Inlets
Overhead
Bath
Filler
HOT COLD
Outlet
Pipe
Building In
Box
Evoco Triple
Water Inlets
HOT COLD
Shower
Fittings
Overhead
Bath
Filler
Outlet
Pipe
Building In
Box

15 1478624-W2-A
Cover
Flushing the Pipework
Turn on the water supply and ush
the outlets.
Isolate the water and remove the caps.
Isolate the water supply and t the push
t stop ends (not supplied) to the outlets.
Re-open the water supply and check for
leaks.
A ushing cartridge is pretted into the Building in Box
to aid in ushing any dirt or debris from the pipework.
Push t stop end caps are required to test the Building In
Box’s inlet and outlet joints for leaks.
ab
c
e
g
f
h
d
ab
c
e
g
f
h
d
ab
c
e
g
f
h
d
Push Fit
Stop End
Note: When pressure testing the
pipework, DO NOT exceed 10 bar
maximum pressure.
Note: You may want to t stop
ends before you turn on the
water supplies. These can be
removed individually to ush and
contain any water in a bucket if
the shower tray area is not yet
installed.

16
1478624-W2-A
Cut a hole in plasterboard using a 152mm hole cutter and build a surface up to the
sides of the Building in Box ready for waterproof nishing.
75mm
75mm
Note: Refer to details of cavity depth and nished wall thickness.
Apply a liberal coat of waterproof adhesive (not supplied) around the product.
Use a suitable waterproof shower tanking adhesive. We recommend a liquid based
plumbing type to be applied with a paint brush, available from tile / builder merchants.
A su󰀩cient amount is required for coating this area twice during the installation.
Built up surface / Plasterboard
(non waterproof)
Plan for front of
nished wall surface
(waterproof) to be
between these
measurements
Finished Wall
Thickness
Depth
Finished Wall
Between Max and Min
1477011-6-A
Max
Min

17 1478624-W2-A
Fit the fabric wall seal and press at around the edges, creating a radius around the
sides of the Building in Box.
Fabric Wall
Seal
Radius
Apply further adhesive over the
fabric wall seal and around the sides
of the Building in Box.
Allow the adhesive to set. Follow
the manufacturer’s instructions for
curing time.
Finish the wall surface.
A distance of 3 - 23 mm should protrude
from the tiled surface.
3 - 23 mm

18
1478624-W2-A
Taking care to prevent damage to the wall nish, trim the Building in Box back to
within 2 mm from the nished wall surface.
Apply silicone sealant to ll the gap around the Building in Box.
2mm Max.
Silicone
Sealant
Padsaw

19 1478624-W2-A
Remove the cover but do not throw
away as it can still be used to
stop debris during nishing of the
installation.
Cover
Flushing
Cartridge
Yellow Valve
Cover
Seal
Mixing
Valve
Remove the cover from mixing valve.
Apply a small amount of grease from the
pack supplied to the seals. You will need
the remaining grease at later stage.
Make sure the seals are in position before
installing the mixing valve.
Make sure both water supplies are isolated
before removing the ushing cartridge.
Remove the ve screws and remove the
ushing cartridge and discard.
Important! Check cleanliness of seals.
Note: Keep the screws for further
installation of mixing valve.

20
1478624-W2-A
Align ribs on concealing plate parallel
to the tiles and secure the concealing
plate using the four screws provided
in component pack.
Only for Lit Variants
Push the grommet attached to the mixing
valve onto the concealing plate as shown.
Wire can be guided through cut out on
concealing plate to allow for larger wall
cavities.
Attach two or three adjustment screw
depending if installing a dual or triple
outlet product by screwing into the
respective slot using screwdriver.
Screw fully into product until nger tight.
Non Lit products, skip step 22
Push in and fully secure the mixing
valve into the Building in Box using the
provided screws that were removed on
step 16. DO NOT use a power driver.
Mixing Valve
Concealing Plate
Seal
Note: DO NOT overtighten the
xing screws as this may distort
the concealing plate.
Note: Ensure wire is guided through
concealing plate as shown in image.
Use for Dual
Outlet Product
Ribs
Adjustment
Screw
Use for
Triple Outlet
Product
Note: Ensure mixing valve is fully
inserted before screwing into box.
Grommet Rear View
Concealing
Plate