Mira Azora User manual

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These instructions are to be left with the user
Installation and User Guide
ELECTRIC SHOWER
MIRA AZORA

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If you experience any difculty with the installation or operation of your new Electric
Shower, please refer to ‘Fault Diagnosis’, before contacting Kohler Mira Ltd.
Our telephone and fax numbers can be found in the back of this guide.
CONTENTS
Patents and Design Registration ........................................................... 2
Introduction .............................................................................................3
Guarantee.................................................................................................3
Important Safety Information .................................................................4
Pack Contents Checklist ........................................................................6
Specications ..........................................................................................7
1. Plumbing ..........................................................................................7
2. Electrical ...........................................................................................7
3. Standards and Approvals .................................................................7
Installation Requirements ...................................................................... 7
1. Plumbing ..........................................................................................7
2. Electrical ...........................................................................................9
Installation .............................................................................................10
Installation of Mira Azora ....................................................................10
Commissioning .....................................................................................14
User Instructions...................................................................................16
Fault Diagnosis......................................................................................20
Maintenance...........................................................................................22
Dimensions ............................................................................................24
Spare Parts ............................................................................................ 25
Wiring Diagram......................................................................................27
Customer Service..................................................................................28
PATENTS AND DESIGN REGISTRATION
Design Registration: 000578463-001-002
Patents: GB: 2 341 667, 2 404 000, 2 428 286
Ireland: 82835, 85128, 85163
Patent Applications: GB: 2 427 460
Ireland: 2006/0462

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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 stabilises
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 indicates
“START/STOP”.
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 Energise 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 the following nishes: frosted glass, blue
glass, grape glass, white ock, stripes, ag, stones and dots.
* 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.
Recommended Usage
Domestic ü
Light Commercial ü
Heavy Commercial û
Healthcare û
GUARANTEE
For domestic installations, Mira Showers guarantee the Mira Azora 9.8kW 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 Azora 9.8kW
against any defect in materials or workmanship for a period of one year from the
date of purchase.
For terms and conditions refer to section “Customer Services”.

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IMPORTANT SAFETY INFORMATION
Installation must be carried out in accordance with these instructions, and must be
conducted by designated, qualied and competent personnel.
Warnings!
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 (refer to
the wiring diagram at the back of this guide).
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. Make sure all electrical connections are tight, to prevent overheating.
11. 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.
12. 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.
13. This product is not suitable for areas with high humidity (i.e steam rooms).
Please consult your installer.
14. THIS APPLIANCE MUST BE EARTHED. MAKE SURE SUPPLEMENTARY BONDING
COMPLIES WITH THE “REQUIREMENTS FOR ELECTRICAL INSTALLATIONS”.
The installation must be in accordance with the current edition of ’The Plugs
and Sockets etc. (Safety) Regulations’ in force at the time of installation, this
appliance is intended to be permanently connected to the xed electrical wiring
of the mains system.
15. If the wiring layout is changed or amended, the product functionally and safety
may be affected.

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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, specied 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:
(a) The young.
(b) The elderly.
(c) The inrm.
(d) The disabled.
(e) Anyone who suffers from a medical condition that can result in
temporary incapacity (e.g. epilepsy or blackouts).
(f) Anyone inexperienced in the correct operation of the controls.
(g) Children should be supervised to ensure that they do not play with the
appliance.
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 ”To contact us”, on the back page of this guide.
(a) If the cover is not correctly tted and water has entered the appliance
case.
(b) If the case is damaged.
(c) If the appliance begins to make an odd noise, smell or smoke.
16. If pipework and/or electical 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.
17. If the shower is dismantled during installation or servicing then upon completion
the product must be inspected to ensure there are no leaks
18. DO NOT Position the handset to spray water directly on to the appliance.
Eg.When cleaning shower control.

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Mira Azora
PACK CONTENTS CHECKLIST
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
Documentation
1 x Installation Template
1 x Installer Checklist
1 x Guarantee Card
1 x Olive
1 x Compression Nut
1 x Mira Azora
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.
(d) If the appliance shows signs of a distinct change in performance,
indicating a need for maintenance.
(e) DO NOT operate this appliance if water leaks from this appliance.

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SPECIFICATIONS
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 .
• The Mira Azora is suitable for installation in Zone 1 and is rated IPX4.
3. Standards and Approvals
• The Mira Azora complies with all relevant directives for CE marking.
INSTALLATION REQUIREMENTS
1. Plumbing
• 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 10 kPa
(0.1 bar). Refer to 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.
• To ensure the case and other components are not put under strain during
installation always provide mechanical support when making plumbing
connections. Upon completion of the installation ensure connections and
back case are not under any stress due to misaligned pipework or electrical
cables.
Isolating Valve
Avoid Sharp Kinks
Convenient height
for all the family
25 mm Min
Bath
Shower Tray
Fixed to nished
wall surface
Minimum
200 mm from
ceiling
Hose Retaining Ring

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2. Electrical
• 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 4.0 mm² if the cable
is not mechanically protected, (2.5 mm² if 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
• A 30 mA Residual Current Device (RCD) MUST be 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.
• The appliance is tted with a brass inlet compression assembly for connecting
to a 15 mm 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.

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Double-pole
Isolating Switch
Consumer Unit
INSTALLATION
Installation of Mira Azora
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.
Remove the three cover retaining
screws and the cover.
Caution! Handle the glass cover
assembly with care.
Cover
Cover Retaining
Screw

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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.
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.
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
(See Plumbing Installation
Requirements).

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Feed cable into Case. Fit Earth
sleeve (not supplied) and then strip
insulation.
Do not twist cable cores.
Firmly connect the conductors. Do not
exert strain on the terminal block.
L = BROWN
E = GREEN/YELLOW
N = BLUE
Refit the Cover, making sure it is
correctly located. Do not overtighten
screws.
Caution! Handle the 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.
When tting the Cover, position the
controls to correspond with the internal
drive features as shown.
Cover
Cover Retaining
Screw
Important! Make sure
that the inlet earth wire is
routed as shown. Failure
to do so may cause
product malfunction.

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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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COMMISSIONING
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 the control slowly.
Temperature remains cool
and ow is reduced
Electrical supply is turned
off at the mains.
0 - 5 Secs
1.
4.
3.2.
6.5.
9.8.7.
Before carrying out the commissioning procedure install the Shower Fittings,
refer to the Shower Fittings Installation and User Guide.
If you are unsure how an electric shower works, please read through the section
“User Instructions” before continuing.

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Turn control to full cold. The temperature will rise
slightly.
Set control to ‘II’.
0 - 10 Secs
12.11.10.
The temperature will rise further.
Adjust temperature as required.
Flow rate will adjust automatically.
The shower will purge
water 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.
18. 19.
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.
17.
Isolate power.
_
+
_
+

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The warmer the shower, the lower the ow
rate and vice versa.
Heated water is produced by adjusting the ow
of cold water passed through a heater tank.
The shower has three heater settings.
USER INSTRUCTIONS
How Your Electric Shower Works
_
+
COLD
_
+
_
+

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The shower's top priority is to keep the desired water temperature constant. Electric
showers with thermostatic control are able to keep a stable temperature across the
range from hot to cold, whilst also dealing with uctuations in electrical and water
supplies. As a result, there is a temperature limit the shower cannot go beyond. For
safety, this temperature is factory set and cannot be adjusted to make the shower
hotter or colder.
Thermostatic (Temperature-Stable)
THERMOSTATIC
ELECTRIC
SHOWER
ORDINARY
ELECTRIC
SHOWER

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Using your Shower
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.
Switch off the appliance at electrical isolating switch when not in use. This is for
safety and is recommended with all electrical appliances.
Press the ‘Start/Stop’ button.
2.
Switch on electrical supply.
1.
Set to desired position.
3.
Residual water may drain
over a few minutes.
8.
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.
7.
Isolate power.
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+
_
+

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Water inlet pressure uctuations due to other draw offs (e.g. ushing toilet). Shower
temperature will be controlled to within ± 2°C of the set temperature provided that
the supply conditions remain within the required operating parameters (refer to
section: ‘Specications’).
For a cold shower select I.
For a summer warm shower select II.
For a winter warm shower select III.
During extremes of mains water supply temperature, adjust heater setting to obtain
a better showering temperature.
The Effect of Seasonal Changes
The Effect of Other Water Devices
Example of how shower temperature
stabilises due to pressure changes.
***
_
+
_
+
± 2°C

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FAULT DIAGNOSIS
The trouble shooting information tabled below gives details on probable causes and
remedies should difculties be encountered whilst the shower is in operation.
Warning! There are no user serviceable components beneath the cover of the
appliance. Only a competent tradesperson should remove the front cover!
Symptom Start/
Stop
Light
Heater
Setting
I/II/III
Probable Cause Possible Remedy
Appliance Fails
to operate
OFF
OFF
Any
Any
Electrical supply isolated at
double pole switch.
Fuse blown or MCB/RCD
tripped, indicating possible
electrical fault.
Switch on electrical supply via
the pullcord or wall mounted
switch.
Renew the fuse or reset the
MCB/RCD. If fault persists,
contact your installer.
Shower cycles
from hot to
cold
ON
ON
ON
ON
II/III
II/III
II/III
II/III
Handset blocked.
Water pressure below
minimum required for appliance
operation.
Temperature dial or Heater
setting too high.
Thermostatic mechanism is
faulty or damaged.
Remove and clean.
Make sure incoming mains
water stopcock and/or
appliance isolating valve is
fully turned on.
Turn the heater selector knob to
setting II or turn the temperature
control until a cooler temperature
is achieved.
Replace.
Unable to select
a cool enough
shower.
ON III Due to the rise in mains water
supply temperature, the Heater
setting may be too high.
Turn the heater selector knob
to II and adjust the temperature
control until a suitable
temperature is achieved.
All the following remedies must be performed by a competent tradesperson.
Handset
dripping
OFF
OFF
Any
Any
Insufficient water supply
pressure for shut off.
Inlet valve faulty.
The minimum static pressure
to ensure shut off and prevent
dripping is 0.2 bar.
Note! If other appliances are
operating, static pressure may
drop below 0.2 bar. Contact
local water company. Renew
the Flow Valve.
Replace.