Kohler Thermostatic Electric Shower User manual

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These instructions are to be left with the user
Installation & User Guide
Mira Azora Thermostatic Electric Shower

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Contents
Introduction................................................................................................3
Important Safety Information .....................................................................4
Pack Contents Checklist ...........................................................................6
Specications ............................................................................................8
Installation Requirements..........................................................................8
Installation ............................................................................................... 11
Commissioning........................................................................................17
User Instructions ..................................................................................... 19
Fault Diagnosis........................................................................................21
Maintenance............................................................................................23
Mira Azora Spare Parts List.....................................................................26
Accessories..............................................................................................26
Mira Energise Shower Fittings Spare Parts List......................................28
Dimensions..............................................................................................29
Wiring Diagram........................................................................................30
Customer Services .................................................................................. 31

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Introduction
Thank you for purchasing a quality Mira product. To enjoy the full potential of your
new product, please take time to read this guide thoroughly. Having done so,
keep it handy for future reference.
The Mira Azora is a thermostatic electric shower with separate controls for power
selection and temperature/ow adjustment. A unique thermostatic valve stabilizes
temperature changes caused by water pressure uctuations. These can result
from taps being turned on or off, or a toilet being ushed. An individual light indi-
cates “ON/OFF”.
The Mira Azora comes complete with a set of Mira Energise Shower Fittings.
Mira Azora 9.8 kW
A 9.8 kW 240 V AC (9.0 kW 230 V AC) heater with Mira Azora adjustable spray
handset with four different spray actions (start, soothe, force and eco*). Supplied
complete with exible hose, clamp bracket assembly, slide bar, supports, hose
retaining ring and soap dish. Available in a satin chrome and glass nish.
* The eco setting reduces the water ow to give economical use of water, whilst
still giving an adequate shower performance. This setting performs best with most
gravity, pumped, and mains pressure unvented systems. On electric showers and
some combination boiler systems the economy setting will have no effect, and will
give the same spray action as the start setting.
Patents and Design Registration
If you experience any difculty with the installation or operation of your new
shower, then please refer to the Fault Diagnosis section, before contacting
Kohler Mira Ltd. Our telephone and fax numbers can be found on the back
cover of this guide.
Design Registration: 000578463-001-002
Patents: GB2341667, Ireland 82835
Patent Applications: GB0612240.2, GB0415901.8, Ireland 2006/0462

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Important Safety Information
Warning!
Follow all warnings, cautions and instructions contained in this guide, and
on or inside the appliance.
1. Products manufactured by us are safe and risk-free, provided that they are
installed, used and maintained in good working order, in accordance with our
instructions and recommendations.
2. Isolate the electrical and water supplies before commencing installation. The
electricity must be turned off at the mains and the appropriate circuit fuse
removed, if applicable.
3. Mains connections are exposed when the cover is removed.
4. Refer to the wiring diagram before making any electrical connections (see
internal wiring diagram at the back of the book).
5. Make sure that any pipework that could become frozen is properly insulated.
6. Having completed the installation, make sure that the user is familiar with the
operation of the appliance.
7. Make sure that this guide is left with the user.
8. DO NOT commission this appliance if water leaks from the unit or the heater
tank pressure relief valve.
9. DO NOT t any form of outlet control (e.g. Trigger handset) as the outlet acts
as a vent for the tank body. Only Mira recommended outlet ttings should be
used.
10. Ensure all electrical connections are tight, to prevent overheating.
11. Warning! DO NOT operate this appliance if it is frozen. Allow the appliance to
thaw before using. The shower unit must not be tted where it may be exposed
to freezing conditions.
12. This product is not suitable for areas with high humidity (i.e. steam rooms).
Please consult your installer.
13. THIS APPLIANCE MUST BE EARTHED. ENSURE SUPPLEMENTARY
BONDING COMPLIES WITH THE “REQUIREMENTS FOR ELECTRICAL
INSTALLATIONS”.
In accordance with the current edition of “The Plugs and Sockets etc. (Safety)
Regulations” in force at the time of installation, this Mira Escape is intended to
be permanently connected to the xed electrical wiring of the mains system.
Installation must be carried out in accordance with these instructions, and
must be conducted by designated, qualied and competent personnel.

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Caution!
1. Read all of these instructions and retain this guide for later use.
2. The electrical installation must comply to “BS 7671 - Requirements for Electrical
Installations”, commonly referred to as the IEE Wiring Regulations - Part 7, or
any particular regulations and practices, specied by the local electricity supply
company.
3. The plumbing installation must comply with the requirements of UK Water
Regulations/Bye-laws (Scotland), Building Regulations or any particular
regulations and practices, specified by the local water company or water
undertakers.
4. Make sure that you fully understand how to operate this shower and make sure
that it is properly maintained in accordance with the instructions given in this
manual.
5. Anyone who may have dif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, the disabled, anyone who suffers from
a medical condition that can result in temporary incapacity (e.g. epilepsy
or blackouts), anyone inexperienced in the correct operation of the
controls.
6. Sunburn or skin conditions can increase your sensitivity to hot water. Make sure
that you set the shower to a cooler temperature.
7. If any of the following conditions occur, isolate the electricity and water supplies
and refer to ”Customer Services”, in the back page of this guide.
• If the cover is not correctly tted and water has entered the
appliance case.
• If the case is damaged.
• If the appliance begins to make an odd noise, smell or smoke.
• If the appliance shows signs of a distinct change in performance,
indicating a need for maintenance.
• DO NOT operate if water leaks from the appliance.
8. When this appliance 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.

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Pack Contents Checklist
Mira Azora
Tick the appropriate boxes to familiarise yourself with the part names and to
conrm that the parts are included.
3 x Wall Plugs
3 x Fixing Screws
1 x Mira Azora
1 x Installation and User Guide
1 x Installation Template
1 x Installer Checklist
1 x Guarantee Card
Documentation
1 x Compression Nut
1 x Olive

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Mira Energise Electric Shower Fittings
Tick the appropriate boxes to familiarise yourself with the part names and to con-
rm that the parts are included.
2 x Wall Plugs
1 x Slide Bar 1 x Flexible Hose
1 x Handset
2 x Hose Seals
1 x Clamp Bracket
Assembly
1 x Soap Dish
1 x Hose Retaining
Ring
2 x End Plugs
2 x Fixing Screws
1 x Installation and User Guide
Documentation
2 x End Supports
2 x Slide Bar Ends

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Installation Requirements
1. Plumbing
Minimum maintained inlet pressure 70 kPa (0.7 bar).
100 kPa (1.0 bar) recommended for satisfactory operation.
Maximum static inlet pressure 1000 kPa (10 bar).
Minimum static pressure 20 kPa (0.2 bar) to keep the inlet valve closed.
2. Electrical
The Mira Azora 9.8 kW requires a 45 Amp fuse.
The terminal block will accept cable up to 16 mm2 .
3. Standards and Approvals
The Mira Azora complies with all relevant directives for CE marking.
1. Plumbing
Specications
The appliance is designed to operate with a minimum maintained inlet
pressure of 0.7 bar up to a maximum static inlet pressure of 10 bar.
When installed in very hard water areas (above 200 ppm temporary
hardness) your installer may advise the installation of a water treatment
device, to reduce the effects of limescale formation. Your local water
company will be able to advise the hardness of water in your area.
It is recommended that a non-restrictive (free owing) isolating valve
is tted in the cold water supply pipe to allow the complete maintenance
of the appliance. Do not use a valve with a loose washer plate (jumper)
as this can lead to a build up of static pressures.
The appliance is suitable for installation within the shower area. It is tted
with a pressure relief device and must be positioned over a water
catchment area with the controls at a convenient height for all users.
The appliance must be tted on to a nished at and even wall surface
(this wall surface should be tiled or waterproofed). Do not t the
appliance to the wall and tile up to the case. For safety requirements, an
air gap must be left behind the appliance.

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Avoid layouts where the shower hose will be sharply kinked. This may
reduce the life of the hose.
A Hose Retaining Ring is supplied to prevent the handset from dropping
below the spill-over level of the bath or shower tray, which
could lead to contamination from back-siphoning. The supplied Hose
Retaining Ring should meet the majority of user requirements for
shower installations with exible outlet ttings. However, there will be
occasions when it will not provide a suitable solution. In these instances
an outlet double checkvalve, e.g. a Mira DCV-H, must be tted. This
will increase the required supply pressure typically by 0.1 bar (see section
“Accessories”).
Supply pipework must be ushed to clear debris before connecting to
the appliance.
To avoid damage to the case when soldered ttings are used, pre-solder
the pipework and ttings before connecting them to the inlet connector
assembly. Refrain from applying excessive force when making any
connections. Always provide mechanical support when making the
plumbing connections.
The appliance is tted with a brass inlet compression assembly for
connecting to a 15mm supply pipe from the top, bottom or back. Double
checkvalves, if tted in the inlet supply to the appliance, can cause a
pressure build-up, which could exceed the maximum static inlet pressure
and damage the appliance.
Isolating Valve
Avoid Sharp Kinks
Convenient height
for all the family
25 mm Min
Bath Shower Tray
Fixed to nished
wall surface
Minimum
200mm from
ceiling
Hose Retaining Ring

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In a domestic installation, the rating of the electricity supplier’s fuse and
the consumer unit must be adequate for the additional demand. All Mira
electric showers are high power units, it is essential to contact your
electricity supplier to ensure that the supply is adequate for the product.
Voltage drop due to local heavy demand will reduce the shower’s
performance.
The appliance must be earthed by connecting the supply-cable earth
conductor to the earth terminal.
Supplementary bonding: Within the bathroom or shower room, all
accessible conductive parts of electrical equipment and extraneous
conductive parts (metal parts) that are likely to introduce earth potential,
must be electrically bonded to earth using a minimum cable size of
4.0mm2if the cable is not mechanically protected, (2.5 mm2if
mechanically protected).
The minimum cable size (cross-sectional area) required should be in
accordance with BS 7671.
As a guide only, and in accordance with BS 7671 we recommend close
circuit protection: i.e. 9.8 kW = 45 Amp
It is strongly recommended that a 30 mA Residual Current Device (RCD)
is included in the electrical circuit. This may be part of the consumer unit
or a separate unit.
A separate, permanently connected supply must be taken from the
consumer unit to the appliance through a double-pole switch, which has
at least 3 mm of contact separation. The switch can be a ceiling mounted
pullcord type within the shower room, or a wall mounted switch in an
adjacent room.
DO NOT twist the individual cable cores of either the live or neutral
conductors, as this will prevent them from entering the terminal block.
DO NOT exert strain on the terminal block. Ensure that the electrical
connections are tightly screwed down.
DO NOT turn-on the electrical supply until the plumbing has been
completed.
2. Electrical

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Double-pole
Isolating Switch
Consumer Unit
Installation
Warning! Turn off the electrical and water supplies before proceeding with the
installation of the Mira Azora. The electricity must be turned off at the mains
and the appropriate circuit fuse removed, if applicable.
Note! An installation template is supplied to help you install the Mira Azora.
1Installation of Mira Azora
Remove the three cover retaining
screws and the cover.
Caution! Handle glass cover assembly
with care.
Cover
Cover Retaining
Screw

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Drill and plug the top two xing holes. Secure the appliance to the wall with
the screws provided. Drill the bottom xing hole with the product in place.
Alternative xings (not supplied) may be necessary for some wall structures.
Avoid drilling into any supply cable/pipe.
Before tting the Cover, make sure that the appropriate cutouts have been
removed to suit the supply entering the product.
Thoroughly ush the mains-fed cold water supply pipe. The supply
must be clean and free from debris BEFORE connecting the appliance.
To ush the pipework, turn on the water supply and drain a minimum of 10
litres (2 gallons) of water into a bucket or catchment area. Turn off the water
supply.
An installation template is supplied to help you install the Mira Azora.
Put the installation template on the wall and mark through the positions of the
xing holes. Ensure the position of these holes do not come in line with any
buried cables or pipework. Make sure that sufcient electrical supply cable is
available for connection to the terminal block.
Determine the direction of the inlet
water supply: top (falling), bottom
(rising), or back inlet .
Note! Make sure that the back inlet
does not go directly back into the
wall. Use a soldered elbow.
Swivel the inlet connector assembly
to suit. Remove the inlet blanking
cap. Avoid trapping the green earth
bonding wire.
Install the mains-fed cold water
supply pipe. Do not overtighten.

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Feed cable into Case. Fit Earth
sleeve (not supplied) and then
strip insulation.
Do not twist cable cores.
L = BROWN
E = GREEN/YELLOW
N = BLUE
Ret the Cover, making sure it is
correctly located. Do not overtighten
screws.
Caution! Handle glass cover
assembly with care.
Do not use alternative screws to
secure the Cover. This can cause
internal damage to the appliance.
Do not seal around the back of
appliance.
Cover
Cover Retaining
Screw
When tting the Cover, position
the controls to correspond with the
internal drive features as shown.
Firmly connect the conductors. Do
not exert strain on the terminal
block.

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Cold Water Supply
Pipe (Bottom Entry)
Fixing Screw
Holes For Cover
Retaining Screws
Electrical
Supply Cable
Terminal
Block
Inlet Connector
Assembly
Heater Tank

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Decide on a suitable position for the slide bar avoiding buried cables and
pipes.
Drill the two 7.0 mm xing holes for the slidebar at 600 mm centres and insert
the wall plugs.
Assemble the clamp bracket components. Push the plastic slidebar ends into
the slidebar.
Push the slidebar through the clamp bracket assembly, soapdish and hose
retaining ring.
Fit the bottom end support loosely to the wall. This will make aligning the top
support easier. Insert the xing screw into the countersunk hole of the plastic
slide bar end and through the slidebar support.
Place the screw through the top end support and fully tighten. Fully tighten
the bottom end support.
Fit the end support caps over the slidebar end supports.
Screw the hose onto the handset and the outlet of the shower (Make sure the
hose seals are tted). Do not overtighten.
Place the handset into the slidebar clamp bracket.
Note! The clamp bracket is tapered. The handset will only t properly from
one direction. If necessary turn the end of the clamp bracket until the handset
will t.
If the clamp bracket pivots downwards under the weight of the handset
the central securing screw in the bracket will require tightening to hold the
handset in position.
Installation of Shower Fittings
2

16
600 mm
End Support Cap
End Support
Fixing Screw
Slidebar End
Clamp Bracket Assembly
Soap Dish
Slidebar
Handset
Hose Retaining Ring

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Commissioning
If you are unsure how an electric shower works, please read through the section
“User Instructions” before continuing.
Turn control to full cold. Turn the water supply fully
on.
Check for water leaks. Set control to ‘I’. Switch on electrical supply.
Press the ‘Start/Stop’ button. Water will be at full force
and at a cool temperature.
Turn control to full cold. The temperature will rise slightly.Set control to ‘II’.
Turn the control slowly.
Temperature remains cool
and ow is reduced
Electrical supply is
turned off at the mains.
0 - 5 Secs
0 - 10 Secs
1.
4.
3.2.
6.5.
9.8.7.
12.11.10.

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The temperature will rise further.
Adjust temperature as
required. Flow rate will adjust
automatically.
The shower will purge from its tank
for a few seconds.
Residual water may drain over a few minutes.
Set control to ‘III’.
5 - 10 Secs
0 - 5 Secs
13.
15.
14.
16.
Press STOP and isolate power.
17. 18.
Note! A slight hissing sound may be heard from the appliance during operation.
High mains water pressure and high shower temperatures will affect the tone.
This is quite normal in use.

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User Instructions
Read the section “Important Safety Information” rst.
Note! At the end of every shower make sure that the shower head points into the
catchment area. A small amount of water may be retained in the shower handset
after the shower has been turned off. This may drain over a few minutes.
Press the ‘Start/Stop’ button.
2.
Switch on electrical supply.
1.
Set to desired position.
3.
Residual water may drain over a
few minutes.
7.
4.
Check water temperature before
entering shower.
5.
Allow 10 - 15 seconds for any temperature adjustments to reach the handset.
6.
Press STOP button. Shower will continue to
run for a few seconds before stopping.

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Spray Action
The handset spray head has four different spray actions:- Eco, Start, Soothe and
Force. The handset operation is described below.
1. Eco
To access the eco setting, turn
the spray plate fully clockwise.
Water will ow from the
outer set of holes at a reduced
ow rate.
2. Start
To access the start setting turn
the spray plate anticlockwise
until it ‘clicks’ (one click from
the eco setting). Water will ow
from the outer set of holes.
3. Soothe
To access the soothe setting
turn the spray plate
anticlockwise until it ‘clicks’ (two
clicks from the eco setting).
Water will ow from the large
diameter holes.
4. Force
To access the force setting turn
the spray plate anticlockwise
until it ‘clicks’ (three clicks from
the eco setting). Water will ow
from the inner set of holes.