Kohler Mira Showers Decor 8.5 kW User manual

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These instructions must be left with the user
Mira Decor
8.5kW, 9.5kW and 10.8kW Electric Shower
Installation and User Guide
Decor
Decor
For SPARES,
ADVICE or REPAIRS
please call us free
on 0800 001 4040
(UK only)

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WARNING - This shower can deliver scalding temperatures, cause
re, electric shock or other personal injury if not operated, or
maintained in accordance with the instructions, warnings and
cautions contained in this guide and on the appliance.
Please read the important safety information and the operation section
of this guide before using the shower. Failure to follow the instructions
provided with this shower will invalidate the guarantee.
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK OR INJURY:
1. 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.
2. Children shall not be allowed to play with the shower.
3. DO NOT restrict the water ow from the shower outlet, temporarily
bending the shower hose or blocking the shower head while in use
can cause a hot shot of water to be discharged.
4. Cleaning and user maintenance shall not be made by children
without supervision.
5. The outlet must not be connected to any tap or tting other than
those specied.
6. The showerhead must be descaled regularly. Any blockage of the
showerhead or hose can cause damage to the shower.
7. Warning! DO NOT switch on if there is a possibility that the water
in the heater is frozen.
8. The shower must be provided with means for local disconnection
from the supply mains having a contact separation in all poles
that provide full disconnection under overvoltage category III,
the instructions state that means for disconnection must be
incorporated in the xed wiring in accordance with the wiring rules.
Important Safety Information

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9. 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.
10.DO NOT switch the shower on if water starts leaking from the shower
case. Isolate the electrical supply to the shower immediately.
11.DO NOT switch the shower on if the case appears to be damaged
or incorrectly tted. Isolate the electrical supply to the shower
immediately.
12.DO NOT increase the power setting or adjust the temperature
control rapidly while using the shower.
13.DO NOT switch the shower o󰀨 and back on while standing in the
water ow.
14.DO NOT change the handset model. Fit only shower heads
recommended by Mira and do no t any additional device to restrict
the water outlet ow.
15.When adjusting the handset mode, point handset away from body
and make sure that the water temperature has stabilised before
continuing to shower.
16.Use caution when altering the water temperature, always check
the temperature before continuing to shower.
17. Switch the shower o󰀨 at the electrical isolating switch when not in
use. This is recommended with all electrical appliances.
18.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.
19.Isolate the electrical and water supplies before commencing
installation. The electricity must be isolated at the consumer unit
and the appropriate circuit fuse removed, if applicable. Mains
connections are exposed when the cover is removed.
20.DO NOT install the shower in areas with high humidity and
temperature (i.e. Steam rooms and saunas).
21.DO NOT install the shower where it may be exposed to freezing
conditions. Ensure that any pipework that could become frozen is
properly insulated.

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22.DO NOT connect the outlet of the shower to any tap, control valve,
trigger operated handset or showerhead other than those specied
for use with this shower as the outlet acts as a vent for the tank
body. Only Kohler Mira recommended accessories should be used.
23.DO NOT perform any unspecied modications, or drill or cut holes
in the product other than instructed by this guide. When servicing
only use genuine Kohler Mira replacement parts.
24.DO NOT connect this shower to a Waste Water Heat Recovery
System as this may cause unstable or scalding temperatures to
be delivered from the shower head.
25.Always check the water temperature is safe before entering the
shower.
26.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.
27.If the shower is dismantled during installation or servicing then,
upon completion, an inspection must be made to ensure all
electrical connections are tight and that there are no leaks.
28.This appliance is intended to be permanently connected to the
water mains and not connected by a hose set.
29.The water inlet of this appliance shall not be connected to a water
supply obtained from any other water heating system.
30.Warning! This appliance is not to be used to provide a potable
water supply.
31.Maximum Static Pressure is 1000 kPa (10 bar).
32.Minimum Dynamic Pressure is 100 kPa (1.0 bar) 10.8 kW.
Minimum Dynamic Pressure is 70kPa (0.7 bar) 8.5 kW and 9.5 kW

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Pack Contents
1 x Electric Shower
Electric Shower
3 x Screws
3 x Wall Plugs
Decor
Disposal and Recycling
End of Product Life
Electrical and electronic devices contain a range of materials that can be separated
for recycling and used in new products.
This product should not be disposed of with your general household
waste. When this product has reached the end of its serviceable life,
please remove any batteries and take it to a recognised WEEE (Waste
Electrical and Electronic Equipment) collection facility such as your local
civic amenity site for recycling.
Your local authority or retailer will be able to advise you of your nearest recycling
facility.

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Shower Fitting
2 x Slide Bar Support
1 x Showerhead
Multimode
1 x Shower Hose
2 x Hose Seal
2 x Mounting Pack
1 x Clamp Bracket
1 x Slide Bar
1 x Soap Dish
1 x Cap

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Dual Shower Fitting
1 x Shower Hose
2 x Hose Seal
1 x Diverter Hose 600 mm (Longer 1.0 m
hose available as an accessory)
2 x Hose Seal
1 x Wall Fixing
1 x Riser Arm
2 x Grubscrew
(1 as spare)
2 x O-rings
(2 as spare)
1 x Overhead
1 x Showerhead
Single Mode
1 x Lower Bar
1 x Middle Bar
1 x Clamp Bracket
1 x Hose Retaining Ring
1 x Diverter Assembly
1 x Riser Fixing Kit

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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.
Domestic Light Commercial 
Heavy Commercial Healthcare 
Design Registration: 003617653-0006
Patents: GB2: 427460; Ireland: 85912
Product Variant Model No. Colour
Mira Decor Single Outlet 8.5 kW J10K
White
Warm Silver
Black Onyx
Mira Decor Single Outlet 9.5 kW J10L
White
Warm Silver
Black Onyx
Mira Decor Dual Outlet 10.8 KW J10M
White
Warm Silver
Black Onyx
Introduction
Products Covered
Recommended Usage
Patents and Design Registration

91365393-W2-D
Specications
Dimensions
Height 332 mm
Width 220 mm
Depth 73.5 mm (97.4 mm including Dials)
Plumbing Variant
8.5 kW 9.5 kW 10.8 kW
Minimum Dynamic Pressure 70 kPa (0.7 bar) 100 kPa (1.0 bar)
Maximum Dynamic Pressure 500 kPa (5.0 bar)
Maximum Static Pressure 1000 kPa (10.0 bar)
Minimum Static Pressure 50 kPa (0.5 bar)
Maximum Inlet Temperature 30°C
Minimum Inlet Temperature 2°C
Inlet Connection 15 mm Compression / Push-t Coupling
Maximum Water Hardness 200 ppm CaCOɜ
Outlet Connection 1/2” BSP Male
Electrical Variant
8.5 kW 9.5 kW 10.8 kW
Nominal Power at 240 V ac 8.5 kW 9.5 kW 10.8 kW
Nominal Power at 230 V ac 7.8 kW 8.7 kW 9.9 kW
Recommended MCB Rating 40 A 45 A
Maximum Supply Cable Size 16 mm²
Recommended RCD Rating 30 mA tripping current
Recommended Isolator Switch 45 A double-pole with 3 mm contact
separation
Appliance Sealing Rating IP X4 - suitable for installation in Zone 1
Maximum Ambient Temperature 30°C
Minimum Ambient Temperature 2°C

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Indicative annual electricity consumption (kWh), based upon 2100 Wh daily water
energy demand. Actual electricity consumption will depend on kW rating and the
duration and frequency of use.
Product Information
Eco-Design/Energy Labelling
Mira Decor
8.5 kW 9.5 kW 10.8 kW
Load Prole XS XS XS
E󰀩ciency Class AAA
E󰀩ciency (%) 39.1 39.0 38.9
Daily Electricity Consumption (kWh) 2.165 2.169 2.177
Annual Electricity Consumption (kWh) 472 473 474
Sound Power Level (dB) 15 15 15
For domestic installations, Mira Showers guarantee the Mira product against
any defect in materials or workmanship for a period of two years from the date of
purchase (shower ttings for one year).
For non-domestic installations, Mira Showers guarantee the Mira product against any
defect in materials or workmanship for a period of one year from the date of purchase.
For Terms and Conditions refer to the back cover of this guide.
Guarantee
European Conformity Information
This range of electric showers complies with the following European directives:
2014/35/EU - Low Voltage Directive (LVD),
2014/30/EU - Electromagnetic Compatibility Directive (EMC),
2011/65/EU - Restriction of Hazardous Substances Directive (RoHS)
This range of electric showers are high power appliances and are subject to
conditional connection. If the main electrical supply fuse is rated less than 80 Amps,
the local electricity supply company must be contacted to conrm if the electrical
supply is adequate.
This range of showers complies with the requirements of the UK’s water regulations.

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1. 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.
2. DO NOT use sealing compounds on any pipe tting or joints.
3. DO NOT install the product in a position in which service access is limited.
4. Decide on a suitable position for the shower (minimum distance of 200 mm from
the ceiling to allow for cover t and removal).
5. The shower is suitable for installation within the shower area and is tted with a
pressure relief valve. It must be positioned over a water catchment area with the
controls at a convenient height for the user.
6. The shower must be tted to a waterproof at and even wall surface.
7. DO NOT t the shower to the wall and tile up to the case.
8. DO NOT seal the gap between the shower and the wall surface.
9. The showerhead should be positioned so that it discharges down the centre line
of the bath or across the opening of a shower cubicle. For dual outlet shower
ttings (Overhead shower and Handset), nished position of the overhead shower
should also be considered to prevent water spraying on to the shower unit.
10.The showerhead must be directed away from the shower unit, during normal use
the showerhead must not spray directly on to the shower unit.
11. 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.
12.This shower is not designed to be plumbed directly from the rear. For rear-entry
supply, add an elbow to the supply pipe and connect as a rising or a falling supply.
13.If pipework and/or electrical cables enter the shower from the rear through a hole
in the wall provision must be made to prevent water ingress back into the wall
structure.
14.This shower is intended to be permanently connected to the mains water supply,
only use the inlet connection supplied with the shower.
DO NOT use any other type of tting.
15. A full bore/non restrictive servicing valve 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.
16.A water treatment device should be installed where the water hardness may
exceed 200 ppm. Malfunctions caused by excessive limescale formation are not
covered by this shower’s guarantee (see back page for details).
17.The installation must not cause the hose to be sharply kinked during normal use.
Plumbing
Installation Requirements

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Hose retaining ring tted and shower ttings xed at a suitable height
preventing dirty water backow
18.DO NOT perform the electrical installation until the plumbing has been completed
and checked for leaks.
19. The position of the shower and shower ttings must provide a minimum gap of
25 mm between the showerhead and the spill over level of any bath, shower tray
or basin and a minimum gap of 30 mm between the showerhead and the spill over
level of any toilet, bidet or other appliance with a Fluid Category 5 backow risk.
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 check valve must be tted, this will increase the required
supply pressure typically by 10kPa (0.1 bar). Double check valves tted in
the inlet supply to the appliance cause a pressure build up, which a󰀨ect
the maximum static inlet pressure for the appliance and must not be tted.
For Fluid category 5 double check valves are not suitable.
Decor
Zone of
Backflow Risk
30 mm
Minimum
Toilet or Bidet
FC5
Hand Basin
FC3
Bath or Shower
Tray FC3
Electric
Shower
25 mm
Minimum
25 mm Minimum

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Electrical
1. The electrical installation must comply with BS 7671 (commonly referred to as
the IEE Wiring Regulations) and all relevant building regulations, or any particular
regulation or practice specied by the local electricity supply company.
2. Ensure that all circuit protection devices, switches and cabling is adequate for the
rated current of the shower and that the rating of the electricity supply company
fuse and the consumer unit are adequate for the additional demand.
3. The shower must be earthed. Ensure any supplementary bonding complies with
the relevant regulations.
4. This shower is intended to be permanently connected to the xed electrical wiring
of the mains system. A separate supply must be provided from the consumer
unit to the shower.
5. DO NOT supply any other electrical equipment including extractor fans or pumps
via this product.
6. This shower must be provided with means for local disconnection that is
incorporated into the xed wiring in accordance with the relevant local wiring
regulations. This must be a double pole switch, which has at least 3 mm contact
separation in each pole. The switch can be a ceiling mounted pull-cord type within
the shower room or a wall mounted switch tted in the applicable zone area.
7. For new installations a 30mA Residual Current Device (RCD) must be incorporated
into the electrical supply to the shower in accordance with the current wiring
regulations. When replacing an existing electric shower we recommend that a
30mA RCD is incorporated in accordance with current wiring regulations if not
already provided.
8. All electrical connections should be checked for tightness to prevent overheating
before switching on the electrical supply.
Note: DO NOT apply excessive force to the terminal block.
9. DO NOT switch on the electrical supply until the plumbing has been completed
and checked for leaks.
Decor
Plumbing and Electrical Schematic

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Warning! Isolate the electrical and water supplies before installing the shower.
1894.017
Diverter Hose
(0.6 m)
1894.018
Diverter Hose
(1.0 m)
If the diverter is positioned outside of the light grey area as shown in the diagram a
longer link hose is available up to 1.0 m max in length. (Part no. 1894.018)
Note: Ensure the position of the shower and the diverter valve for the dual
head product allows for easy connection of the short supplied hose and the
overhead is at a suitable height for all users.
968 mm
Ceiling
100 mm
700 mm
300 mm
X
Minimum 1110 mm
Note: The dual outlet shower diverter valve that comes with this product
is designed specically for electric showers. DO NOT t any other type of
diverter to the electric shower.
Install the Shower

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Decor
Cover
Bung
Bung
Screw
Screws
Note: Ensure that there are su󰀩cient
lengths of supply pipe and electrical
cable to reach the connection points.
Caution! DO NOT drill into cables or
pipes in the wall.
Remove the three screws that hold the cover
on and remove the cover.
Remove the bungs.
Use the installation template provided, level
and mark the positions of the three xing
holes.
Drill three holes to suit the xing screws and
wall plugs.
Thoroughly flush the supply pipe before
connecting the product.
Determine the direction and route of the
electric supply cable.
Determine the direction and route of the
incoming water supply: falling (entering the
shower from the top), or rising (entering the
shower from the bottom).
Note: DO NOT use an incoming supply
entering the shower directly from the
back. Add an elbow to the supply pipe
and connect it as a rising or falling supply.

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Inlet Filter
Push fit
Elbow Inlet
Connector
Inlet Supply Pipe
Check the inlet lter is in position before
connecting inlet supply.
Connect the inlet supply pipe to the inlet
connector using a push t elbow or an elbow
with compression nuts and olives.
Upon completion of the installation ensure
connections and back case are not under
any stress due to misaligned pipework or
electrical cables.
Important! DO NOT use push fit
elbows that require specialist tools
for removal. Access to the inlet lter
is required periodically and so any
connector needs to easily removed for
maintenance.
Note: DO NOT exert strain on the
terminal block. Make sure that the
electrical connections are tightly
screwed down.
Turn on the water supply and check for leaks.
Strip back su󰀩cient outer cable insulation
to enable routing to terminal block.
Fit an earth sleeve to the earth wire.
Loosen the screws in the terminal block
and insert the wires.
Tighten the screws in the terminal block,
ensure the wires are secure and tight.
N(Neutral) = Blue Wire
L(Live) = Brown Wire
(Protective Earth) =
Green /Yellow Sleeved Wire

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Note: DO NOT extend beyond thinned
section.
Ensure the earth bonding complies with
relevant regulations.
Ensure the control dials are aligned with
the spindles and replace the cover.
Tighten the three cover screws (DO NOT
use electric screwdrivers to tighten the
screws).
Decor
DO NOT use alternative screws to
secure the cover. This can cause
internal damage to the appliance.
DO NOT seal around any part of
appliance.
This completes the installation,
follow the guidelines in section
'COMMISSIONING' to prepare the
shower for use.
Decor
Cover
Spindles
Screw
Screws
Decor
The cover has thinned sections that can
be removed to allow entry of the supply
pipe and electrical cables.
Remove the top thinned section of the
case for a falling supply, or remove the
bottom thinned section for a rising supply.
If the electrical cables enter from above
or below, remove an additional thinned
section for the electrical cable. DO NOT
remove any section if the electrical cables
enter from the back.

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Install the Shower Fittings
Mira Decor Single Outlet
Ø 8 mm
Ø 8 mm
For new installations optimum
fixing centres 630 mm
We recommend that the slide bar is installed with
the ends ush. Mark the wall xing positions and
drill two holes to suit the wall xings.
Caution! Do not drill into cables or pipes in
the wall.
Note: For new installation optimum xing
centres 630 mm. Replacement installation
xing centres 630 mm maximum.

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Install the clamp bracket and the slide bar
supports to the slide bar.
Make sure that the wall screws are ush
with the inside edge of the mounting
brackets. Fit the slide bar supports over the
mounting brackets, then adjust the slide
bar vertically ensuring an equal length of
slide bar protrudes from the top and bottom
mounting bracket (or ush with the end of
the slide bar for new installations).
Remove the slide bar assembly carefully,
preventing any further movement between
the slide bar and the slide bar supports.
Tighten the two slide bar clamping screws
no more than half a turn to secure the slide
bar supports to the slide bar.
Caution! Overtightening these screws
will cause damage.
Insert the wall plugs and x the mounting
brackets and secure with the wall screws.
Note: Check for vertical alignment
before tightening. The mounting
brackets are slotted to aid this
alignment. Then fully tighten.

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Install the slide bar assembly onto
the mounting brackets. Tighten the
2 x M4 screws with the supplied 3 mm
hexagonal key.
Install the end cap at top and the soap
dish at bottom.
Fit a hose seal into the conical nut and
screw onto the outlet of the shower.
Caution! DO NOT over tighten.
Feed the hose through the soap dish.
Fit a hose seal into the conical nut and
screw onto the showerhead.
Caution! DO NOT over tighten.
Place the showerhead assembly into the
clamp bracket.
Caution! DO NOT force assembly on
to the mounting brackets, re-align a
slide bar support if required.