Mira Elite ST User manual

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THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER
Uploaded on http://www.qssupplies.co.uk - Document BY MIRA
Installation and User Guide
PUMPED ELECTRIC SHOWER

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Contents
Introduction................................................................................................3
Important Safety Information .....................................................................4
Pack Contents Checklist ...........................................................................6
1. Mira Elite ST.....................................................................................6
2. Documentation .................................................................................6
3. Mira Logic Electric Shower Fittings ..................................................7
Specications ............................................................................................8
1. Plumbing ..........................................................................................8
2. Electrical...........................................................................................8
3. Standards and Approvals ................................................................. 8
Installation Requirements.......................................................................... 9
1. Plumbing ..........................................................................................9
2.1 Electrical.......................................................................................13
2.2 Electrical (checklist in detail) ........................................................14
Installation ...............................................................................................15
Mira Elite ST.......................................................................................15
Mira Logic Electric Shower Fittings ....................................................17
Commissioning........................................................................................19
User Instructions .....................................................................................21
Using Your Shower............................................................................. 22
Fault Diagnosis........................................................................................24
Maintenance............................................................................................27
Handset - Cleaning.............................................................................27
Filter - Cleaning/Renewing................................................................. 27
Dimensions..............................................................................................28
Wiring Diagram........................................................................................29
Spare Parts .............................................................................................30
Mira Elite ST Spare Parts List ............................................................30
Mira Logic Electric Shower Fittings Spare Parts List..........................32
Optional Accessories............................................................................... 33
Notes .......................................................................................................34
Customer Service.......................................................................Back Page

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Thank you for purchasing a quality Mira product. To exploit 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 Elite ST is a tank-fed (cistern-fed) pumped electric shower for use where
the mains water supply pressure is too low, unreliable or non existent, to operate a
conventional electric shower.
The Mira Elite ST features an internal pump unit which has been designed to provide
all year round performance, even at the highest ow rates which are necessary
during the summer months. The Elite ST has separate controls for power selection
and temperature/ow adjustment. The Elite ST MUST have its own separate cold
water supply from the cistern to ensure correct operation.
The Mira Elite ST comes complete with a set of Mira Logic Electric Shower
Fittings.
Products Covered By This Guide:
Mira Elite ST - A 9.8 kW @ 240 Volts AC (9.0 kW @ 230 Volts AC) heater. Available
in white/chrome nish.
Mira Logic Electric Shower Fittings
An adjustable spray handset with four different spray actions (start, soothe, force
and eco), supplied complete with exible hose, clamp bracket assembly, slide bar,
supports, soap dish/hose retaining ring. Available in white/chrome nish.
Introduction
If you experience any difculty with the installation or operation of your new
shower control, then please refer to "Fault Diagnosis", before contacting Kohler
Mira Limited. Our telephone and fax numbers can be found on the back cover
of this guide.

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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 APPLIANCE MUST BE EARTHED. MAKE SURE SUPPLEMENTARY
BONDING COMPLIES WITH THE "REQUIREMENTS FOR ELECTRICAL
INSTALLATIONS".
In accordance with the current edition of BS 7671 ‘The IEE Wiring 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 with its own dedicated
supply.
1.3 DO NOT twist the individual cable cores of the live and neutral conductors, as
this will prevent them from entering the terminal block.
1.4 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.
1.5 DO NOT operate this appliance if it appears to be frozen. Allow the appliance
to thaw and then contact your installer before using again.
1.6 There are no user serviceable components beneath the cover of this appliance.
Only a competent tradesperson should remove the cover. If the cover is removed,
the following warnings must be observed:
1.6.1 Turn off the electrical and water supplies before removing the cover.
1.6.2 Mains connections are exposed when the cover is removed.
1.6.3 Refer to the wiring diagram before making any electrical connections
(see section "Wiring Diagram").
1.6.4 Make sure all electrical connections are tight, to prevent them
overheating.
1.7 If any of the following conditions occur, isolate the electricity and water supplies.
Contact your installer or refer to “To contact us”, on the back page of this
guide:
1.7.1 If water is leaking from inside the product.
1.7.2 If the case is damaged.
1.7.3 If the appliance begins to make an odd noise, smell or smoke.
1.7.4 If the appliance shows signs of a distinct change in performance,
indicating a need for maintenance.
1.7.5 If the cover is not correctly tted.
1.8 DO NOT t any form of outlet ow control as the outlet acts as a vent for the
tank body. Only Mira recommended outlet ttings should be used.

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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 appliance.
2.4 The electrical installation must comply with the “Requirements for Electrical
Installations” (see section "Installation Requirements") commonly referred
to as BS 7671 the IEE Wiring Regulations, or any particular regulations and
practices, specied 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:
2.4.1 National Inspection Council for Electrical Installation and Contracting
(NICEIC), throughout the UK.
2.4.2 The Electrical Contractors Association (ECA), England and Wales.
2.4.3 The Electrical Contractors Association of Scotland (ECAS).
2.5 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. The installation
should be carried out by a plumber or contractor who is registered, or is a
member of, an association such as:
2.5.1 Institute of Plumbing (IOP), throughout the UK.
2.5.2 National Association of Plumbing, Heating and Mechanical Services
Contractors (NAPH & MSC), England and Wales.
2.5.3 Scottish and Northern Ireland Plumbing Employers’Federation (SNIPEF),
Scotland and Northern Ireland.
2.6 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, or anyone inexperienced in the
correct operation of the controls.
2.7 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
Tick the appropriate boxes to familiarize yourself with the part names and to
conrm that the parts are included.

1. Mira Elite ST
1 x Mira Elite ST
3 x Wall Plugs
1 x Compression Nut
1 x Olive
3 x Fixing Screws
3 x Rubber Feet
1 x Case Insert

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2 x Fixing Screws
2 x Slide Bar End Supports
1 x Soap Dish/Hose Retaining Ring
2 x Wall Plugs
2 x Hose Seals
1 x Handset
1 x 1.25 m Flexible Hose
1 x Clamp Bracket Assembly
1 x Slide Bar
2 x Slide Bar End Caps
1 x Applicator
1 x Soap Dish Collar
2. Mira Logic Electric Shower Fittings
3. Documentation
1 x Installation and User Guide
1 x Installer Checklist
1 x Guarantee Card
1 x Template (Use inner tment)

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Specications
1. Plumbing
1.1 The 15 mm inlet compression connector incorporates an inlet lter. The inlet
swivels to allow top, bottom or rear entry.
1.2 The outlet terminates with a 1/2" BSP male thread for connection to a Mira
exible shower hose.
2. Electrical
This is a high power unit, it is essential to contact your electricity supply company
to make sure that the electricity supply is adequate for the purpose.
2.1 The terminal block will not accept cable larger than 16 mm2.
2.2 The motor is tted with a self resetting thermal trip protection device, designed
to operate if the ambient temperatures become too high. The maximum
recommended ambient temperature for the Elite ST is 30°C.
2.3 The following power ratings for the heater tanks are available with their respective
voltages: Mira Elite ST 9.8 kW @ 240 V / 45 Amps (9.0 kW @ 230 V / 40
Amps).
2.4 The motor will absorb approximately 100 Watts maximum power under normal
working conditions.
3. Standards and Approvals
3.1 The Mira Elite ST has been designed to comply with the requirements of the
British Electrotechnical Approvals Board (BEAB) and the requirements of UK
Water Regulations/Bye-laws (Scotland).
3.2 This Mira Elite ST complies with all relevant directives for CE marking.

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Installation Requirements
1. Plumbing
Read the section 'Important Safety Information' rst.
1.1 The Elite ST is designed to operate with water supply pressures from 0.8 kPa
(0.008 bar / 80 millimetres head) to 100 kPa (1 bar / 10 metres head) (i.e. the
vertical distance from the base of the cold cistern to the top of the Elite ST).
However, the minimum head required will increase with pipe length and the
guide given in paragraph 1.17 should be used to make sure that adequate head
is available for any given installation.
The Elite ST MUST have its own separate supply from the cistern.
Incorrect Cistern Take Off
Debris from the bottom of the
cistern and air generated when
the cistern rells will enter the
shower supply.
Correct Cistern Take Off
Positioned away from the ball
valve, with a 25 mm distance
up from the base of the
cistern. This connection will
prevent air and debris entering
the shower supply.
25 mm
1.2 The Elite ST is suitable for installation within the shower area and is tted with
a pressure relief valve. It must be positioned over a water catchment area with
the controls at a convenient height. The shower tting should be positioned so
that it discharges down the centre line of the bath, or across the opening of a
shower cubicle, and must be directed away from the shower unit.
1.3 Use a minimum of 15 mm diameter supply pipework. It should be noted, however,
that on long pipe runs this should be increased to 22 mm (refer to para 1.17 for
guidance). When using exible plastic pipe it is essential that the pipe is kept
at and not looped up at any point as this may lead to air build up which may
impair performance of the shower.
25 Gallon/113 Ltr Cistern

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1.4 A non restrictive (free owing) isolating valve should be tted into the supply
from the cold water cistern, for maintenance purposes.
1.5 The Elite ST must be tted ONTO the nished wall surface i.e. on top of the
tiles. DO NOT block the air ventilation gaps around the sides of the unit, either
by tiling up to the sides of the unit or by using a sealant around the case.
Important! This Elite ST is designed to be ventilated. Failure to do this may
cause product failure.
Note! The Mira Elite ST is tted with a pump motor, and some mechanical
noise can be expected in addition to the noise generated by the spray from
the handset. The type of wall surface will affect the perceived sound levels.
Stud partition and panel walls have a tendency to resonate, whilst solid walls
provide the quietest operation. The tone of the pump motor may change when
the temperature control knob is adjusted. This is quite normal.
1.6 Inlet: 15 mm inlet compression connector is designed to accept plumbing supplies
from the top, bottom or rear.
1.7 Rear entry plumbing is accommodated without the need to recess the 15 mm
inlet compression connector, enabling the wall’s surface to be completed and
sealed to prevent water ingress, before nal tting.
1.8 Swivel the inlet connector assembly to suit (not directly back into the wall). Avoid
trapping the green earth bonding wire.
1.9 Use only the 15 mm inlet compression connector supplied with the Elite ST, do
not use any other types of tting.
1.10 Outlet: 1/2" BSP male, to accept Mira exible hose.
1.11Refrain from applying excessive force when making connections.
Note! Excessive force on the pump housing can impair pumping performance.
Make sure that the supply pipe is trimmed and bent such that the 15 mm inlet
connector sits (or can be lightly pressed) easily on the back of the clamp bracket
prior to connection with the pump housing.
1.12 To avoid damage to the case when soldered ttings are used, pre-solder the
pipework and ttings before connecting them to the 15 mm inlet compression
connector.
1.13 Supply pipework MUST be ushed to clear debris before connecting the
Elite ST.

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1.17 Long pipe runs and excessive use of 90° elbows will signicantly reduce the
available head to supply the Elite ST. The pipework table should be completed
to ensure that adequate head is available for any given application.
Spill-over
Level
25 mm Minimum
Soap Dish/Hose
Retaining Ring
1.15When 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.
1.16Avoid layouts where the hose will be
sharply kinked. This may reduce the
life of the hose.
1.14A 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 back-siphonage (refer to illustration). The supplied hose retaining ring
should meet the great majority of user requirements for shower installations
with exible outlet ttings. 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 tted. The inclusion of the
Mira DCV-H will increase the required supply pressure typically by 10 kPa (0.1
bar).
Double checkvalves, fitted in the inlet supply to the appliance, cause a
pressure build-up, which could exceed the maximum static inlet pressure for
the appliance.

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Size
15 mm Pipe
22 mm Pipe
15 mm Elbow
22 mm Elbow
Head Loss (mm)
Minimum Effective Head
(x) mm
1.5 0.75 2.25 270
55
80
405
1
Pipework
The dimension (x) is calculated from the table below to give you a minimum
effective head of 80 mm which is necessary to produce a satisfactory shower in all
conditions.
Example! The example below is based on the diagram above with 15 mm
pipework, A = 1.5 m, B = 0.75 m.
Plumbing Schematic Diagram
A
B
X
Quantity
Number of Elbows
Number of Elbows
(A) + (B) = x 120
(A) + (B) = x 20
x 55
x 15

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2.1 Electrical
Read the section 'Important Safety Information' rst.
Checklist
2.1.1 Electrical supply fuse and consumer unit are adequate for the product.
2.1.2 Shower unit is earthed.
2.1.3 The minimum required supply cable size must conform to BS 7671.
2.1.4 Double pole isolating switch.
2.1.5 Do not twist live or neutral cable cores.
2.1.6 Electrical connections are tightly secured.
Do not strain terminal block.
2.1.7 Plumbing supply completed before electrical supply is turned on.
Plumbing and Electrical Schematic Diagram
Consumer Unit
Double Pole
Isolating Switch
Soap Dish/
Hose Retaining
Ring
Cold Water Storage
Cistern (Tank)
Hot Water
Cylinder Vent
Pipe
Isolating
Valve
Independent Cold Water Supply
to Shower
Warning Pipe
Hot Water
Cylinder
Feed
Cistern Fed
Cold Supply
to Other
Outlets
Cold Water
Mains Feed

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2.2 Electrical (checklist in detail)
2.2.1 In a domestic installation, the rating of the electricity supplier's fuse and
the consumer unit must be adequate for the additional demand. The
Mira Elite ST is a high power unit, therefore 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.
2.2.2 The Mira Elite ST 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 mm2if the cable is not mechanically protected, (2.5 mm2if
mechanically protected).
2.2.3 Supply cable - refer to: 'Electrical Checklist'.
2.2.4 As a guide only, and in accordance with BS 7671 we recommend close
circuit protection:
i.e. 9.8 kW @ 240 V = 45 Amp (9.0 kW @ 230 V = 40 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 is 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 in an adjacent
room.
2.2.5 DO NOT twist the individual cable cores of either the live or neutral
conductors, as this will prevent them from entering the terminal block.
2.2.6 DO NOT exert strain on the terminal block. Ensure that the electrical
connections are tightly screwed down.
2.2.7 DO NOT turn on the electrical supply until the plumbing has been
completed.

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Installation
Mira Elite ST
Read the section 'Important Safety Information' rst.
Electrical supply is turned
off at the mains.
200 mm minimum gap
from ceiling.
Remove the four cover
screws.
CAUTION! Do not
drill into buried cables
or pipes.
Drill and plug*the
three holes using the
template.
Remove the cover and
determine supply pipe
position.
For rear inlet, use
soldered elbow.
Do not trap green wire.
Fit Rubber Feet and x
appliance to wall.
Flush a minimum
of 10 litres through
pipework.
* Alternative xings for some wall structures are not supplied.
1. 2. 200 mm 3.
4. 5. 6.
7. 8. 9.
↓
↑
High
Medium
Low

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Connect supply pipe. Do not
overtighten!
Feed cable into Case. Fit Earth
sleeve (not supplied) and strip
insulation.
Do not twist cable cores.
Firmly connect the conductors.
Do not exert strain on the
terminal block.
Make sure wires are clear of all
mounting holes.
Ret the Service Tunnel and
Cover. Make sure they fit
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.
L = BROWN
E = GREEN
N = BLUE
10. 11.
12. 13.
14. 15.
High
Medium
Low

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Applicator
Clamp Bracket
Slide Bar
25 mm Minimum
Spill-over level
Soap Dish/Retaining
Ring
Mira Logic Electric Shower Fittings
Read the section 'Important Safety Information' rst.
Button
Position as shown to prevent
back siphonage.
Depress button FULLY and
assemble Clamp Bracket.
Release button and remove
Applicator.
Slide the Soap Dish/Hose
Retaining Ring and the Soap
Dish Support collar onto the
Slide Bar below the Clamp
Bracket.
Lock Features
Fit both the top and bottom
Supports. Make sure the slots
are aligned to t fully home.
1. 2.
3. 4.

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Mark the position of the middle
slot on both top and bottom
Supports.
CAUTION! Do not drill into
buried cables or pipes.
First x the bottom Slide Bar
Support and fully tighten the
screw*. Then x the top Slide
Bar support whilst pressing
it down, to keep the whole
assembly together.
Fit the End Caps to the Slide
Bar supports.
5. 6.
7. 8.
Fit the Hose to both the
Handset and the Shower Outlet,
remembering to pass it through
the Soap Dish/Hose Retaining
Ring. Do not overtighten the
Hose connections.
9.
* Alternative xings for some wall structures are not supplied.
Hose Retaining
Ring

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Power
Low Flow
Low High
Medium
Temperature
Start Stop
Power
Low Flow
Low High
Temperature
Medium
Start Stop
Commissioning
If you are unsure how electric showers work, please read through the 'User
Instructions' Section before continuing.
Electrical supply is
turned off at the mains.
Turn BOTTOM control
to full cold.
Turn water supply fully on.
Switch on electrical supply.
Turn BOTTOM control
to full cold.
Check for water leaks. Turn TOP control to
LOW.
The temperature will rise
slightly.
1. 2. 3.
4. 5. 6.
7. 8. 9.
10. 11. 12.
Push START button. Water will be at full force
and at a cool temperature.
Turn BOTTOM control
slowly. Temperature remains
cool and ow is reduced.
COLD
0-5 secs
_
+
0-5 secs
Set the TOP control to
MEDIUM.

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13. 14.
15. 16.
17. 18.
_
+
0-5 secs
Set the TOP control to HIGH. The temperature will rise further.
Adjust temperature as required.
Flow rate will adjust automatically.
Press STOP and isolate power.
0-5 secs
The shower will purge water from
its tank for a few seconds.
Residual water may drain over
a few minutes.
Power