Mira Sport Owner's manual

1
Maintenance Guide
Operation &B
Installation
ELECTRIC SHOWERS
THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER
10.8 kW

2
Contents
Section Page
1 ..... Introduction ................................................................... 3
2 ..... Important Safety Information........................................... 4
3 ..... Pack Contents Checklist .................................................. 6
4 ..... Dimensions ................................................................... 7
..... Wiring Diagram ................................................................. 8
6 ..... Specifications ................................................................... 9
7 ..... Installation Requirements .............................................. 10
8 ..... Installation ................................................................. 14
9 ..... Commissioning ............................................................... 17
10 ... Operation......................................................................... 19
11 ... Maintenance .................................................................... 23
12 ... Fault Diagnosis ............................................................... 30
13 ... Spare Parts...................................................................... 32
14 ... Accessories .................................................................... 34
Guarantee, Customer Care Policy, and How to contact us
.............................................................................. Back cover

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Section
1Introduction
Ifyouexperienceanydifficultywiththeinstallationoroperationofyournewshower
control, then please refer to the Fault Diagnosis section, before contacting
CaradonPlumbingSolutions.Ourtelephoneandfaxnumberscanbefoundonthe
back cover of this guide.
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.
TheMiraSportelectricshowerhasseparatecontrolsforpowerselectionandtemperature/
flow adjustment. A unique flow regulator stabilises temperature changes caused by
water pressure fluctuations. These can result from taps being turned on or off or toilets
being flushed.
Mira S ort 10.8 - A 10.8 kW 240 V AC (9.9 kW 230 V AC) heater with a Mira RF1
adjustable spray handset with three different spray actions (start, force and soothe).
Individual lights indicate 'Standby', 'Low Flow' and 'Overheat'.
Supplied complete with flexible hose, adjustable clamp bracket assembly, soap dish,
slide bar, supports and hose retaining ring.
Available in the following finishes; white/chrome, white and light golden.

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Section
2Important Safety Information
1. WARNING!
1.1. Products manufactured by us are safe and without risk provided they are
installed, used and maintained in good working order in accordance with our
instructions and recommendations.
1.2. THIS MIRA SPORT MUST BE EARTHED.
1.3. In accordance with the current edition of ‘The Plugs and Sockets etc. (Safety)
Regulations' in force at the time of installation, this Mira Sport is intended to be
permanently connected to the fixed electrical wiring of the mains system.
1.4. DO NOT twist the individual cable cores of the live and neutral conductors, as
this will prevent them from entering the terminal block.
1.5. Make sure that any pipework that could become frozen is properly insulated.
1.6. DO NOT operatethisMiraSportifitisfrozen.AllowtheMiraSporttothawbefore
using again. DO NOT use if suspected of being frozen.
1.7. Ifwaterleaksfromthepressurereliefvalve,maintenancewillberequiredbefore
the Mira Sport can be safely used.
1.8. DO NOT fitanyformofoutletflowcontrolas theoutletactsasaventforthetank
body. Only Mira recommended outlet fittings should be used.
1.9. Thereare nouserserviceable componentsbeneaththe coverofthe MiraSport.
Only a competent tradesperson should remove the cover.
1.10. 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.
1.11. Isolate the electrical and water supply before removing the cover.
1.12. Mains connections are exposed when the cover is removed.
1.10.1. If the cover is not correctly fitted and water has entered the Mira Sport
case.
1.10.2. If the case is damaged.
1.10.3. If the Mira Sport begins to make an odd noise, smell or smoke.
1.10.4. If the Mira Sport shows signs of a distinct change in performance,
indicating a need for maintenance.
1.10.5. If the Mira Sport is frozen.

1.13. Refer to the wiring diagram before making any electrical connections.
1.14. Ensure all electrical connections are tight, to prevent overheating.
2. Caution!
2.1. Read all of these instructions and retain this guide for later use.
2.2. Pass on this guide in the event of change of ownership of the installation site.
2.3. Follow all warnings, cautions and instructions contained in this guide, and on or
inside the Mira Sport.
2.4. The electrical installation must comply with the “Requirements for Electrical
Installations” commonly referred to as the IEE Wiring Regulations, or any
particular regulations and practices, specified by the local electricity supply
companyinforceatthetimeofinstallation.Theinstallationshouldbecarriedout
by an electrician or contractor who is registered, or is a member of, an
association such as:
2.5. Thisisahighpowerunit;itisessentialtocontactyourelectricitysupplycompany
to ensure that the electricity supply is adequate for the purpose.
2.6. The plumbing installation must comply with the requirements of UK Water
Regulations/Bylaws(Scotland),BuildingRegulationsoranyparticularregulations
and practices, specified by the local water company or water undertakers. The
installation should be carried out by a plumber or contractor who is registered,
or is a member of, an association such as:
2.7. Anyone who may have difficulty understanding or operating the controls of any
showershouldbeattendedwhilstshowering.Particularconsiderationshouldbe
giventotheyoung,theelderly,theinfirm,oranyoneinexperiencedinthecorrect
operation of the controls.
2.8. When this Mira Sport 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.
2.4.1. National Inspection Council for Electrical Installation and Contracting
(NICEIC), throughout the UK, Tel: [phone].
2.4.2. The Electrical Contractors Association (ECA), England and Wales,
Tel: [phone].
2.4.3. The Electrical Contractors Association of Scotland (ECAS),
Tel: [phone].
2.6.1. Institute of Plumbing (IOP), throughout the UK, Tel: [phone].
2.6.2. National Association of Plumbing, Heating and Mechanical Services
Contractors (NAPH & MSC), England and Wales, Tel: [phone].
2.6.3. ScottishandNorthernIrelandPlumbingEmployers’Federation(SNIPEF),
Scotland and Northern Ireland, Tel: [phone].

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Tick the appropriate boxes to familiarize yourself with the part names and to confirm that the
parts are included.

Section
3Pack Contents Checklist
1. Mira Sport 10.8 kW
2. Documentation
1 x Installation, Operation and Maintenance Guide 
1 x Installation Template 
1 x Customer Support Brochure 
1 x Mira Sport 10.8 
3 x Wall Plug 
1 x Compression Nut 
1 x Olive 
3 x Fixing Screws 

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Section
4Dimensions
342 mm
203 mm 76 mm

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Section
5Wiring Diagram
Thermal Cutout
Dual Disc
Tank Connection
Overheat
P
E
N
Solenoid
Valve
Pressure Switch
Relay PCB
Inlet Connector
89 Brown
91 Green
90 Blue
92 Green
Stop
85 Red
87 Brown
98 Blue
Load
Brown
Black
Black
Green Blue
Red

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Section
6Specifications
1. Plumbing
1.1. Minimum maintained inlet pressure 1.0 bar for satisfactory operation.
1.2. Maximum static inlet pressure 10 bar.
1.3. Minimum static pressure 0.2 bar to keep the flow valve closed.
2. Electrical
2.1. The Mira Sport requires a 45 Amp fuse.
2.2. The terminal block will not accept cable larger than 16 mm2 .
3. Standards and Appro als
3.1. TheMiraSporthasbeendesignedtocomplywiththerequirementsoftheBritish
Electrotechnical Approvals Board (BEAB) and UK Water Regulations/Bylaws
(Scotland)
.
3.2. This Mira Sport complies with all relevant directives for CE marking.

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Section
7Installation Re uirements
1. Plumbing
1.1. The Mira Sport is designed to operate with a minimum maintained inlet
ressure of 1.0 bar up to a maximum static inlet ressure of 10 bar.
1.2. The Mira Sport is normally connected to the cold water mains-fed supply.
However, the water supply can be taken from a cold water storage cistern,
provided there is a minimum maintained inlet head of water of 10 metres (the
vertical distance from the base of the cold water storage cistern to the shower
fitting handset). The cistern-fed water supply must be independent from other
supply draw-offs, and should avoid long horizontal pipe runs and use swept
bends rather than 90° elbows.
1.3. The Mira Sport is suitable for installation within the shower area. It must be
positioned over a water catchment area with the controls at a convenient height
for the user.
1.4. TheMiraSportisfittedwithabrassinletconnectorassemblyintendedtoconnect
to a 15 mm compression fitting supplied from the top, bottom or back.
1.5. Do not fit the Mira Sport to the wall and tile up to the case. The Mira Sport must
befittedontothefinishedflatandevenwallsurface.Thisisimportantasdifficulty
maybeencounteredwhenfittingthecoverandsubsequentoperationoftheunit
could be impaired (Small pillars moulded on to the back of the case allow air
circulation).
1.6. Refrain from applying excessive force when making any connections. Always
provide mechanical support when making the plumbing connections.
1.7. Do not install the Mira S ort in a osition where it may become frozen. The
shower unit must not be fitted where it may be exposed to freezing conditions.
The shower unit must not be used if suspected of being frozen.
1.8. We recommend that a non-restrictive (free flowing) isolating valve is fitted in the
coldwatersupplypipetoallowthecompletemaintenanceoftheMiraSport.Do not
use a valve with a loose washer plate (jumper).
1.9. To avoid damage to the case when soldered fittings are used, pre-solder the
pipework and fittings before connecting them to the inlet connector assembly.
1.10. TheMiraSportisfittedwitha ½"BSPmaleoutletthread,toacceptaMirashower
hose.

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1.11. Supply pipework MUST be flushed to clear debris before connecting the Mira
Sport.
1.12. 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. Mira Sport malfunction due to excessive
limescale formation is not covered by the manufacturer’s guarantee. Your local
water company will be able to advise the hardness of water in your area.
1.13. Ahoseretainingringissuppliedtopreventthehandsetfromdroppingbelowthe
spillover level of the bath or shower, which could lead to contamination from
backsiphonage(refertoFigure 1).Thesuppliedhoseretainingringshouldmeet
thegreatmajorityofuserrequirementsforshowerinstallationswithflexibleoutlet
fittings. However, there will be occasions when the hose retaining ring will not
provideasuitablesolution.Intheseinstancesanoutlet doublecheckvalve,e.g.
the Mira DCV-H, must be fitted. The inclusion of the Mira DCV-H will increase
the required supply pressure typically by 0.1 bar.
Doublecheckvalves,fittedinthe inlet supply to the appliance, cause a pressure
buildup,whichcouldexceedthemaximumstaticinletpressurefortheappliance.
1.14. Avoidlayoutswheretheshowerhosewillbesharplykinked.Thismayreducethe
life of the hose.
Hose Retaining
Ring
25mmMinimum
Spill-over
Level
2. Electrical
2.1. In a domestic installation, the rating of the electricity supply company fuse and
the consumer unit must be adequate for the additional demand. As these Mira
Sports are high power units, it is essential to contact your electricity supply
company to ensure that the supply is adequate for the Mira Sport. Voltage drop
due to local heavy demand will reduce the shower's performance.
Figure 1

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2.2. The Mira Sport must be earthed by connecting the supply-cable earth
conductor to the earth terminal.
Su lementary bonding: Within the bathroom or shower room, all accessible
conductive parts of electrical equipment and extraneous conductive 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
mm2if mechanically protected).
2.3. The minimum cable size (cross-sectional area) required is 6 mm2under normal
conditions of installation.
Im ortant! Theshowercircuitshouldbeseparatedfromothercircuitsbyatleast
twice the diameter of the cable or conduit and it should not be run through
thermally insulating material or in locations where the ambient temperature is
likelyto exceed 30 °C.Ifany of these conditionsareunavoidable it is necessary
to determine the cable size which will prevent damage to the cable size which
will prevent damage to the cable caused by overheating.
2.4. To obtain full advantage of the power provided by this unit, use the shortest
possible cable route from the consumer unit to the shower. It is also necessary
to satisfy the disconnection time and thermal constraints which mean that, for
any given combination of current demand, voltage drop and cable size, there is
a maximum permissible length of circuit.
As a guide only, the following maximum permissible lengths are given for
6 mm2 and 10mm2 cable protected by a 45A MCB type B and allowing for a 5
volt drop:
Mira Sport 10.8 kW (240 V AC) at 240 V - 15 metres 6 mm cable
Mira Sport 10.8 kW (240 V AC) at 240 V - 25 metres 10 mm cable
2.5. A 30 mA residual current device (RCD) should be fitted. This may be part of the
consumer unit or a separate unit.
2.6. A separate, permanently connected supply must be taken from the consumer
unit to the Mira Sport through a 45 amp double-pole switch, which has at least
3 mm contact separation. The switch can be a ceiling mounted pull-cord type
within the shower room or a wall mounted switch in an adjacent room.
2.7. DO NOT twist the individual cable cores of the live and neutral conductors, as
this will prevent them from entering the terminal block.
2.8. DO NOT exert strain on the terminal block.
2.9. DO NOT turn-on the electrical supply until the plumbing has been completed.

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Plumbing and Electrical Schematic Diagram

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Section
8Installation
1. Mira Sport
WARNING! Isolate the electrical and water supplies before proceeding with the
installation of the Mira Sport.
Note! An installation template is supplied to help you install the Mira Sport.
1.1. DecideonasuitablepositionfortheMiraSport(minimumdistanceof200mm
from the ceiling to allow for cover fit and removal). The position of the Mira
Sportandtheshowerfittingsmustprovideaminimumgapof25mmbetween
thespill-overlevel of the shower tray/bath and the handset.Thisistoprevent
backsiphonage (Refer to Figure 1, Section 7).
1.2. Remove the three cover retaining screws.
1.3. Remove the cover.
1.4. Remove the service tunnel.
1.5. 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 a solid wall.
Use a soldered elbow.
1.6. Swivel the inlet connector assembly to suit. Remove the inlet blanking cap.
Avoid trapping the green earth bonding wire.
1.7. TwocaseinsertsaresuppliedwiththeMiraSport,sothattheycanbetrimmed
tosuitthesuppliesenteringtheproduct.Beforefittingthecase,makesurethat
the case inserts are fitted.
1.8. Thoroughly flush the mains-fed cold water su ly i e. The su ly
must be clean and free from debris BEFORE connecting the Mira S ort.
1.9. Puttheinstallation template on the wall and markthroughthepositionsofthe
fixing holes. Make sure that sufficient electrical supply cable is available for
connection to the terminal block.

1
1.10. Drill and plug the top two fixing holes. Secure the Mira Sport to the wall with
the screws provided. Drill the bottom fixing hole with the product in place.
Alternative fixings(notsupplied)maybenecessaryforsomewallstructures.
Avoid drilling into any supply cable/pipe.
1.11. Install the mains-fed cold water supply pipe.
1.12. Make the connection to the mains-fed cold water supply pipe.
1.13. Bring the electrical supply cable into the case through one of the cable entry
points.
1.14. Strip back sufficient of the outer cable insulation to enable routing to terminal
block.
1.15. Fit an earth sleeve to the earth conductor. Connect the conductors firmly into
the terminal block. Make sure that the bare cores of each conductor are
securely trapped within each conductor clamp.
L = Red wire
N = Black wire
E = Yellow/Green sleeved wire.
1.16. Re-tighten the terminal block screws.
1.17. Ifnecessary, fitanearth bondingclampto thecoppersupplypipe andensure
bonding complies with relevant regulations in force at the time of installation.
1.18. Refit the cover. Fit and tighten the three cover retaining screws.
1.19. Fit the shower fittings. Refer to separate instructions.

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Installation of the Mira S ort
Service Tunnel
Inlet Connector
Assembly
Case Insert
Green Earth
Bonding Wire
Cold Water
Supply Pipe
Electrical Supply
Cable
Terminal Block
Cover Retaining
Screw
(The inlet connector
assembly can be
swivelled to suit the
supply)
Fixing Screw
Splash Guard
(Make sure that it is secured
before operating the shower)
Outlet
Connector
Case Insert
(Shown trimmed to
suit rising supply)
Cover Retaining
Screw
Do not fit the Mira Sport to the wall
and tile up to the case. The Mira
Sport must be fitted on to a finished
flat and even wall surface (small
pillars moulded on to the back of the
case allow air circulation).

17
1. Mira Sport
If you are unsure how electric showers work, please read through Section 10,
O eration before continuing.
Section
9Commissioning
1.1. TurntheTem erature controlknobfullyanticlockwisetothefullcoldposition.
1.2. Turn on the water supply fully on at the isolating valve, check that water is
not leaking from the bottom of the case.
1.3. Switchontheelectrical supplyatthedoublepole switch.The'Standby' neon
will provide a visual indication that the electrical supply is connected.
1.4. Press the 'Low' button. Check that water flows freely from the shower within
a few seconds. If not refer to Section 12, Fault Diagnosis. The water from
the handset will be at full force and at a cool temperature.
1.5. Turn the Tem erature control knob slowly clockwise. As the knob is rotated
theflowwillbe reducedandthe temperaturewillremaincool- thisshowsthat
the flow regulator assembly is operating correctly. Return the Tem erature
control knob anticlockwise to full cold position.
1.6. Pressthe 'Medium' button. The temperatureofthewater shouldriseslightly.
Allowafewsecondsforthewarmwatertoreachthehandset-thisshowsthat
the 'Medium' power setting is operating correctly.
1.7. Press the 'High' button. The temperature of the water will rise further - this
shows that the full power setting is operating correctly.
1.8. Set the shower temperature by rotating the Tem erature control knob as
necessary.TurntheTem erature controlknobclockwiseforhotterwaterand
anticlockwise for cooler water.
Note! When the temperature is changed the flow rate will change.
1.9. Whentherequiredtemperatureisreached,pushtheSTOP buttontostopthe
flow.Waterwillcontinueto flow fromthe handsetforafewseconds,aswater
is purged from the tank. Isolate the power at the double pole switch.
Note! A slight hissing sound may be heard from the Mira Sport during
operation. High mains water pressure and high shower temperatures will
affect the tone. This is quite normal in use.

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Hotter
Cooler
Press to Stop
High
Low
Medium
Commissioning the Mira S ort

19
1. Ad ice to Users
1.1. Electric showers work by taking in cold water and passing it over the heating
elements contained in the tank body of the shower.
1.2. Theshoweringtemperatureisadjustedbyturningthetemperaturecontrolknob,
which varies the flow of cold water across the elements. The slower the rate of
flow, the warmer the water and vice versa. The holes in the spray plate of the
shower handset should always be kept clean to maintain a consistent flow and
stable shower temperatures.
1.3. The Mira Sport is designed to stabilise temperature changes caused by water
pressurefluctuations.Thesecanresultfromtapsbeingturnedonoroffortoilets
beingflushed.Undersuchconditionsaverageshowertemperatureswillbeheld
withina 6°Cband,provided that the minimumrequiredpressure is maintained.
1.4. Seasonal changes in the temperature of the incoming cold water supply and or
fluctuationsinmainselectricalvoltage,willrequirethe'Tem erature' knobtobe
adjusted as necessary.
1.5. The Mira Sport requires a minimum maintained/running pressure of 1.0 bar to
operate.Atpressuresabove1.0bartheMiraSportwillminimisethetemperature
fluctuations caused when other draw-off points are used. If the flow rate drops
below an acceptable value, the Mira Sport will turn the heater elements off,
resulting in a cool shower. The 'Low Flow' neon will provide visual confirmation
of this condition.
1.6. If the water temperature reaches an unsafe level, the thermal switch assembly
turnsofftheheaterelements.Asthewatertemperaturefallstheheaterelements
will be turned on. The switch will cycle on/off/on if the flow rate is not increased
and the temperature of the shower reduced. The 'Overheat' neon will provide
visual confirmation of this condition.
Caution! ThisshowerisNOT thermostatic.Itcanbesettoscaldingtemperatures.
The young, the elderly, the infirm, or anyone inexperienced in the correct
operation of the shower should be supervised.
1.7. Check the shower temperature before entering the shower. The previous user
may have selected a different temperature setting.
1.8. When the shower is first turned on, or a different temperature is selected, there
will be a slight delay before the water temperature changes.
Section
10 Operation

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Temperature rise versus flow rate for the Mira Sport 10.8kW
(i) These curves are for the specified outputs at 240V.
(ii) All Mira Sport heating elements have a manufacturing tolerance. Thus
flow rates can be above or below those indicated.
(iii) The left-hand scale is temperature rise. (Temperature rise = Showering
temperature minus the incoming cold water temperature.)
Exam le: FortheMiraSport10.8kWonfullpowersettingwithanincomingwatersupply
at 10°C and a showering temperature at 40°C, the temperature rise is 30°C. The flow
rate is therefore, 5 l/min.
Flow rate (litres er minute)
Tem erature rise °C
91
045 87632
10
15
1110
20
25
30
35
40
45
50
55
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