Mira Divisa User manual

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These instructions are to be left with the user
Installation and User Guide
Mira Divisa Electric Shower

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Contents
Introduction .............................................................................................3
Guarantee.................................................................................................4
Patents and Design Registration..........................................................4
Important Safety Information .................................................................5
Warning! ............................................................................................... 5
Caution!................................................................................................ 6
Pack Contents Checklist ........................................................................7
Specications ..........................................................................................8
Installation Requirements ......................................................................8
Installation ............................................................................................. 11
Installation of Mira Divisa ................................................................... 11
Installation of Overhead and Handset................................................14
Commissioning .....................................................................................16
User Instructions................................................................................... 19
Fault Diagnosis......................................................................................22
Heater Settings...................................................................................22
Wiring Diagram...................................................................................... 25
Maintenance...........................................................................................26
Inlet Filter - Cleaning/Renewing .........................................................26
Handset - Cleaning.............................................................................27
Spare Parts ............................................................................................28
Dimensions ............................................................................................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 Divisa is an electric shower with separate controls for power selection
and temperature/ow adjustment. A unique valve stabilises temperature changes
caused by water pressure uctuations. These can result from taps being turned on/
off, or toilets being ushed. Water is either delivered through the main overhead
or a slimline handset which magnetically xes to the shower unit when not in use.
Water ow to either of the shower outlets is determined by a diverter handle at the
base of the unit
Mira Divisa 9.0 kW
A 9.0 kW 240V AC (8.3 kW 230V AC) heater with overhead and slimline handset.
Supplied complete with exible hose. Available in white/chrome.
Mira Divisa 9.8 kW
A 9.8 kW 240V AC (9.0 kW 230V AC) heater with overhead and slimline handset.
Supplied complete with exible hose. Available in white/chrome.
Mira Divisa 10.8 kW
A 10.8 kW 240V AC (9.9 kW 230V AC) heater with overhead and slimline handset.
Supplied complete with exible hose. Available in white/chrome.
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 pages of this guide.

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Recommended Usage
Domestic ü
Light Commercial û
Heavy Commercial û
Healthcare û
Guarantee
For domestic installations, Mira Showers guarantee the Mira Divisa against any
defect in materials or workmanship for a period of two years from the date of purchase
(overhead, handset and hose for one year).
For non-domestic installations, Mira Showers guarantee the Mira Divisa 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”.
Patents and Design Registration
Design Registration 001065023-0005, -0006
Patents GB: 2 341 667, 2 404 000, 2 428 286.
Eire: 82835
Patent Applications UK: 2 427 460
Eire: 2004/0483, 2006/0462, 2008/0289.

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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.
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 connecting to the appliance.
3. Mains electrical connections are exposed when the cover is removed.
4. Refer to the wiring diagram before making any electrical connections (refer to
the wiring diagram in this guide).
5. Make sure that this guide is left with the user.
6. DO NOT commission this appliance if water leaks from the unit or the heater
tank pressure relief valve (bottom of the tank).
7. 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.
8. Make sure all electrical connections are tight, to prevent overheating.
9. The shower unit must not be tted where it may be exposed to freezing
conditions. Make sure that any pipework that could become frozen is properly
insulated. Warning, do not operate this appliance if it appears to be frozen,
allow to thaw and then contact your installer before using again.
10. This product is not suitable for areas with high humidity (i.e steam rooms).
11. THE APPLIANCE MUST BE EARTHED. MAKE SURE SUPPLEMENTARY
BONDING COMPLIES WITH THE “REQUIREMENTS FOR ELECTRICAL
INSTALLATIONS”.
This appliance is intended to be permanently connected to the xed electrical
wiring of the mains system.
12. If the wiring layout is changed or amended, the product functionality and safety
may be affected.
13. This appliance contains magnets. Users tted with a heart pacemaker or ICD
should follow their normal safety precautions for products that contain magnets.
The magnets are located down the left side of the main unit. There are no
magnets in the shower handset.

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Caution!
1. 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.
2. 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.
3. Make sure that users fully understand how to operate the shower and that it
should be maintained properly in accordance with the instructions given in this
guide.
4. 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:
4.1. The young.
4.2. The elderly.
4.3. The inrm.
4.4. The disabled.
4.5. Anyone who suffers from a medical condition that can result in temporary
incapacity (e.g. epilepsy or blackouts).
4.6. Anyone inexperienced in the correct operation of the controls.
5. Children should be supervised to make sure that they do not play with the
appliance.
6. Sunburn or skin conditions can increase sensitivity to hot water. Users should
make sure that the shower is set to a cooler temperature if required.
7. If any of the following conditions occur, isolate the electricity and water supplies
and refer to “To contact us”, in the back pages of this guide:
7.1. If the cover is not correctly tted and water has entered the appliance
case.
7.2. If the case is damaged.
7.3. If the appliance begins to make an odd noise, smell or smoke.
7.4. If the appliance shows signs of a distinct change in performance,
indicating a need for maintenance.
7.5 DO NOT operate if water leaks from the appliance.
8. When the 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 Divisa
Tick the appropriate boxes to familiarise yourself with the part names and to
conrm that the parts are included.
Documentation
1 x Guarantee Registration Document
1 x Installation Template & Checklist
2 x Screw Pack
1 x Handset Holder
1 x Hose
1 x Overhead
1 x Shroud
1 x Bracket
1 x Part C
1 x Part D
1 x Part B
1 x Main Unit (Part A)
1 x Handset

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Specifications
1. Plumbing
• Minimum maintained inlet pressure for 9.0 kW and 9.8 kW, 70 kPa (0.7 bar)
for satisfactory operation.
• Minimum maintained inlet pressure for 10.8 kW, 100 kPa (1.0 bar) 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 Divisa 9.0 kW requires a 40 Amp circuit protection device.
• The Mira Divisa 9.8 kW requires a 45 Amp circuit protection device.
• The Mira Divisa 10.8 kW requires a 45 Amp circuit protection device.
• The terminal block will accept cable up to 16 mm².
3. Standards and Approvals
• The Mira Divisa complies with all relevant directives for CE marking.
Installation Requirements
1. Plumbing
• 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.
• A non-restrictive (free owing) isolating valve MUST be 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.
• To comply with Water Regulations, two single check valves are tted to
the outlet of the shower to prevent contamination from backsyphoning.
Double inlet check valves are not required and may cause a pressure build
up which could exceed the maximum static inlet pressure for the appliance.
• 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, or apply any type of sealant around the appliance.
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.
• 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 15 mm supply pipe from the top, bottom or back. The tting of double
checkvalves 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.
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 in accordance with BS7671.
• 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 30mA 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 contact separation. The switch can be a ceiling mounted pullcord type
within the shower room or a wall mounted switch tted in the applicable zone
area.

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Ceiling
Isolating Valve
700 mm
Avoid Sharp Kinks
Shower Tray
• DO NOT exert strain on the terminal block. Make sure that the electrical
connections are tightly screwed down.
• DO NOT turn-on the electrical supply until the plumbing has been
completed.
Double-pole
Isolating Switch
Consumer Unit

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Installation
Installation of Mira Divisa
Warning! Turn off the electrical and water supplies before proceeding with the
installation of the Mira Divisa. The electricity must be turned off at the mains and
the appropriate circuit fuse electrically isolated, if applicable.
Remove the three cover retaining
screws.
Remove the cover.
Remove the service tunnel.
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 to suit.
Remove the inlet blanking cap. Avoid
trapping the green earth bonding
wire.
Service Tunnel

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Thoroughlyushthemains-fedcoldwatersupplypipe.Thesupplymust
be clean and free from debris BEFORE connecting the Mira Divisa.
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 and checklist is supplied to help you install the Mira
Divisa.
Mark the positions of the xing holes to secure the shower to the wall. Before
drilling into the wall, make sure that the holes are clear of any buried cables or
pipework. Make sure that a sufcient length of electrical supply cable is available
for connection to the terminal block.
Drill and plug the xing holes. Secure the shower to the wall with the three
screws provided. Alternative screw xings (not supplied) may be necessary for
some wall structures.
Install the mains-fed cold water supply
pipe. Do not overtighten.
Feed cable into case. Fit earth sleeve
(not supplied) and strip insulation.
Important! Make
sure that the inlet
earth wire is routed
as shown. Failure
to do so may cause
product malfunction.

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Firmly connect the conductors. Do not
exert strain on the terminal block.
Two case inserts are supplied with the
Mira Divisa which may be trimmed to
suit the supplies entering the product.
Fit the lower case insert to the service
tunnel
Ret the service tunnel to the shower.
Ret the cover. Make sure that it ts
correctly. Do not overtighten screws.
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.
Fit the upper case insert.
L = BROWN
E = GREEN/YELLOW
N = BLUE

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Part A
Part D
Overhead
Hose
Installation of Overhead and Handset
Decide on the position and fix the
handset holder to part B using the two
screws provided.
Note! The handset holder cannot be
assembled or adjusted easily after
installation is completed.
Feed the plastic pipe through part B and
assemble part B to part A.
Part C
Shroud
Part B
Handset
Holder
Bracket
Handset
x 2

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Assemble the grey part of the bracket
to part C as shown until it locks. Feed
plastic pipe through and assemble both
to part B. Then mark the bracket holes
(one per side).
Remove parts B, C and the bracket
and separate part B. Drill and plug the
holes. Do not drill into buried pipes or
cables.
Alternative screw xings (not supplied)
may be necessary for some wall
structures.
Feed plastic pipe back through part B
and part C and then ret part B to part
A. Secure the bracket to the wall and
t the Shroud.
Note! Make sure the handset holder is
the right way up.
Make sure all parts are pushed fully
home so the excess plastic pipe is
within the dimension shown.
Grip plastic pipe and feed into part D.
Push plastic pipe fully home to make
sure of seal.
Tip: using washing up liquid may aid
assembly of plastic pipe to part D.
Secure with retaining screw, then t
overhead and washer to part D.
Check overhead is level and free to
move as shown.
Place one at seal in both ends of hose
and t one end to Part A. Fit handset
to hose.
30-50mm
x 1
x 1
Locator Hole
Hardened
Surface
Locator Pin

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Commissioning
If you are unsure how an electric shower works, please read through the User
Instructions section before continuing.
Turn control to full cold. Turn water supply fully
on.
Electrical supply is turned
off at the mains.
1. 3.
6.4.
7.
2.
Check for water leaks. Switch on electrical supply
and press the ‘Start/Stop’
button.
Set control to LOW
5.
COLD
Water will be at full force
and at cool temperature.
0 - 5 secs

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Switch water ow from
overhead to handset 2-3
times to test operation.
Check whole shower for leaks.
8. 9.
10.
13. 14. 15.
11. 12.
Turn control slowly.
Temperature remains
cool and ow is reduced.
Turn control to full cold. Set control to MEDIUM.
_
+
Temperature will rise
slightly.
5 - 10 secs
Set control to HIGH.
_
+
Temperature will rise
further.
5 - 10 secs

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Note! A slight hissing sound may be heard from the Mira Divisa during operation.
High mains water pressure and high shower temperatures will affect the tone. This
is quite normal in use.
Adjust temperature as required.
Flow rate will adjust automatically.
Press STOP and isolate power.
Shower will purge water for a few
seconds.
Handset may be kept on handset
holder or magnetically attached to
main unit (Part A).
When storing handset, make sure
spray nozzles are always pointing
away from main unit.
Residual water may drain over a
few minutes.
0 - 5 secs
16.17.
18. 19.
20. 21.

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User Instructions
How Your Electric Shower Works
The warmer the shower, the lower the
ow rate and vice versa.
Hot water is produced by passing cold
water through a heating tank.
The shower has three heater settings.
_
+
_
+
_
+
COLD

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_
+
Water inlet pressure uctuations due to other draw offs (e.g. ushing toilet) will cause
the showering temperature to increase.
***
_
+
For a cold shower select LOW
For a summer warm shower select MEDIUM
For a winter warm shower select HIGH
Adjust the temperature as required
The ow rate will adjust automatically
The Effect of Seasonal Changes
The Effect of Other Water Devices
Showering temperature
will stabilize to within 6°C
band if other outlets are
opened whilst showering,
providing minimum
pressure does not fall
below 70 kPa (0.7 bar).
Selected Showering
Temperature
Example of how shower temperature
stabilizes due to pressure changes.