Mira Sport Maintance 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

5 ..... 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

3

Section

1

Introduction

If you experience any difficulty with the installation or operation of your new shower
control, then please refer to the Fault Diagnosis section, before contacting
Caradon Plumbing Solutions. Our telephone and fax numbers can be found on the
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.

The Mira Sport electric shower has separate controls for power selection and temperature/
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 Sport 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

2

Important 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 operate this Mira Sport if it is frozen. Allow the Mira Sport to thaw before
using again. DO NOT use if suspected of being frozen.

1.7. If water leaks from the pressure relief valve, maintenance will be required before

the Mira Sport can be safely used.

1.8. DO NOT fit any form of outlet flow control as the outlet acts as a vent for the tank
body. Only Mira recommended outlet fittings should be used.

1.9. There are no user serviceable components beneath the cover of the Mira Sport.
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.

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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
company in force at the time of installation. The installation should be carried out
by an electrician or contractor who is registered, or is a member of, an
association such as:

2.5. This is a high power unit; it is essential to contact your electricity supply company
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), Building Regulations or any particular regulations
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
shower should be attended whilst showering. Particular consideration should be
given to the young, the elderly, the infirm, or anyone inexperienced in the correct
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. Scottish and Northern Ireland Plumbing Employers’ Federation (SNIPEF),
Scotland and Northern Ireland, Tel: [phone].

6

 Tick the appropriate boxes to familiarize yourself with the part names and to confirm that the
parts are included.



Section

3

Pack 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 

7

Section

4

Dimensions

342 mm

203 mm

76 mm

8

Section

5

Wiring 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

9

Section

6

Specifications

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 Approvals

3.1. The Mira Sport has been designed to comply with the requirements of the British
Electrotechnical Approvals Board (BEAB) and UK Water Regulations/Bylaws
(Scotland)

.

3.2. This Mira Sport complies with all relevant directives for CE marking.

10

Section

7

Installation Requirements

1. Plumbing

1.1. The Mira Sport is designed to operate with a minimum maintained inlet
pressure of 1.0 bar up to a maximum static inlet pressure 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. The Mira Sport is fitted with a brass inlet connector assembly intended to connect
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
be fitted on to the finished flat and even wall surface. This is important as difficulty
may be encountered when fitting the cover and subsequent operation of the unit
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 Sport in a position 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
cold water supply pipe to allow the complete maintenance of the Mira Sport. 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. The Mira Sport is fitted with a ½ " BSP male outlet thread, to accept a Mira shower
hose.

11

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. A hose retaining ring is supplied to prevent the handset from dropping below the
spillover level of the bath or shower, which could lead to contamination from
backsiphonage (refer to Figure 1). The supplied hose retaining ring should meet
the great majority of user requirements for shower installations with flexible outlet
fittings. However, there will be occasions when the hose retaining ring will not
provide a suitable solution. In these instances an outlet double checkvalve, 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.

Double checkvalves, fitted in the inlet supply to the appliance, cause a pressure
buildup, which could exceed the maximum static inlet pressure for the appliance.

1.14. Avoid layouts where the shower hose will be sharply kinked. This may reduce the
life of the hose.

Hose Retaining
Ring

25 mm Minimum

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