Mira Elite ST User manual

1
These instructions must be left with the user
Installation Guide
Mira Elite ST
9.8, 10.8 kW
For SPARES, ADVICE
or REPAIRS
Please call us on
0844 571 5000
(UK Only)

2
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 contact details can be found on the back cover of this guide.
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.
Mira Elite ST models covered by this guide:
Mira Elite ST 9.8 - A 9.8 kW @ 240 Volts AC (9.0 kW @ 230 Volts AC) heater.
Available in white/chrome or satin/chrome nishes.
Mira Elite ST 10.8 - A 10.8 kW @ 240 Volts AC (9.9 kW @ 230 Volts AC) heater.
Available in a white/chrome nish.
Guarantee
For domestic installations, Mira Showers guarantee the Mira Elite ST 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 Elite ST against
any defect in materials or workmanship for a period of one year from the date of
purchase.
For terms and conditions refer to the back cover of this guide.
Recommended Usage
Domestic ü
Light Commercial ü
Heavy Commercial û
Healthcare û
Patents
Patents: GB:2 289 323, 2 341 667, 2 359 339, 2 427 460, 2 432 201
Ireland: 80655, 82835, 83692
Patent Applications: Ireland: 2006/0462, 2006/0818
INTRODUCTION

3
IMPORTANT SAFETY INFORMATION
WARNING - This shower can deliver scalding temperatures if not operated,
installed or maintained in accordance with the instructions, warnings and
cautions contained in this guide and on or inside the appliance.
1. Installation of this shower must be carried out in accordance with these
instructions, and must be conducted by competent personnel.
2. Isolate the electrical and water supplies before commencing installation. The
electricity must be switched off at the consumer unit and the appropriate circuit
fuse removed, if applicable.
3. Mains connections are exposed when the cover is removed.
4. The electrical installation must comply with BS 7671 (commonly referred to
as the IEE Wiring Regulations) and all relevant building regulations, or any
particular regulation or practice specied by the local electricity supply company.
5. The plumbing installation must comply with all national or local water regulations
and all relevant building regulations, or any particular regulation or practice
specied by the local water supply company.
6. This shower is intended to be permanently connected to the xed electrical wiring
of the mains system. A separate supply must be provided from the consumer
unit to the shower.
7. This shower must be provided with means for disconnection that is incorporated
into the xed wiring in accordance with the relevant local wiring regulations. The
isolating switch must be local to the appliance and may be a ceiling mounted
pullcord type or a wall mounted switch tted in an appropriate zone area.
8. In accordance with BS7671 a 30mA Residual Current Device (RCD) must be
tted. This may be part of the consumer unit or a separate unit.
9. This shower must be earthed. Ensure any supplementary bonding complies
with the relevant regulations.
10. Ensure all electrical connections are tight, to prevent overheating.
11. This shower must not be tted where it may be exposed to freezing conditions.
Ensure that any pipe-work that could become frozen is properly insulated.
12. This shower is not suitable for areas with high humidity or temperature (i.e.
steam rooms and saunas).
13. Mains connections are exposed when the cover is removed, only a competent
person should remove the front cover. We recommend any maintenance work
is carried out by a Mira Service Engineer or suitably qualied tradesperson.
There are no user serviceable parts inside the shower.
14. DO NOT switch on if water leaks from the shower case. Isolate the electrical
supply to the shower immediately.
15. DO NOT switch on if there is a possibility that the water in the shower is frozen.
16. DO NOT connect the outlet of the shower to any tap, control valve, trigger
handset or showerhead other than those specied for use with this shower.
Only Kohler Mira recommended accessories should be used.

4
17. Electric showers can deliver scalding temperatures if not operated, installed or
maintained in accordance with the instructions, warnings and cautions contained
in this guide and on or inside the shower.
18. Rapid or excessive operation of the shower controls may result in high or
unstable outlet water temperatures. Operate controls gradually and allow 10-15
seconds to stabilise checking the temperature before entering the shower.
19. This shower is not intended for use by persons (including children) with reduced
physical, sensory or mental capabilities, or lack of experience and knowledge,
unless they have been given supervision or instruction concerning the use of
the shower by a person responsible for their safety.
20. Children should be supervised to ensure that they do not play with the shower.
21. Always switch off the shower at the electrical isolating switch when not in use.
22. The showerhead must be de-scaled regularly.
23. DO NOT allow the handset to spray water directly on to the shower. Eg. When
cleaning shower control.
24. If the shower is not to be used for a long period, the water supply to the shower
must be isolated. If the shower or pipe-work is at risk of freezing during this
period, they should also be drained of water.
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.
• If the cover is not correctly tted and water has entered the shower case
• If the case is damaged
• If the shower begins to make an odd noise, smell or smoke
• If the shower shows signs of a distinct change in performance indicating a need
for maintenance
• If the shower is frozen

5
PACK CONTENTS CHECKLIST
q1 x Mira Elite ST
q1 x Compression Nut
q1 x Olive
q3 x Rubber Feet
q1 x Case Insert
Documentation
q1 x Installation and User Guide
q1 x Guarantee Registration Document
Tick the appropriate boxes to familiarise yourself with the part names and to conrm that the parts are
included.
RED
RED
BROWN
MOTOR
BROWN
BROWN
BROWN
BROWN
BLUE
GREEN
GREEN
ORANGE
BLACK
STOP/START
INLET CONNECTOR
TANK CONNECTION
LOW FLOW NEON
POWER ON NEON
THERMAL TRIP
PRESSURE / POWER SELECTOR SWITCH
SOLENOID VALVE
BLACK
BLACK
BLUE
C 0.1u
BLUE
BLUE
THERMAL CUTOUT DUAL DISC
L
LNE
N
LOAD
HIGH
LOW
WIRING DIAGRAM

6
SPECIFICATIONS
1. Plumbing
1.1 The 15 mm inlet compression connector incorporates an inlet lter. The inlet
swivels to allow top, bottom or rear entry.
Note! Whilst bottom entry is possible it is not recommended as it may encourage
airlocks.
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.
The minimum required supply cable size must conform to BS 7671.
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).
Mira Elite ST 10.8 kW @ 240 V / 45 Amps (9.9 kW @ 230 V / 45 Amps).
2.4 The motor will absorb approximately 100 Watts maximum power under normal
working conditions.
2.5 The Mira Elite ST is suitable for installation within zone 1 and is rated IP X4.
3. Standards and Approvals
3.1 This Mira Elite ST complies with all relevant directives for CE marking.
Dimensions
Height 340 mm
Width 266 mm
Depth 95 mm

7
1. Plumbing
Read the section 'Important Safety Information' rst.
1.1 The Elite ST is designed to operate with gravity fed water supplies providing
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). The unit should be never be tted to a mains supply or
where the above maximum pressure may be exceeded. Failure to comply with
this may result in product damage leading to signicant uncontrolled leakage
from the unit.
The Elite ST MUST have its own separate supply from the cistern.
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.
INSTALLATION REQUIREMENTS
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
25 Gallon/113 Ltr Cistern
• * Note: In practice 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.

8
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
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 to a tiled or sealed nished surface . 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. If pipework and/or electrical 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.
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.
1.11 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.
Note! Excessive force on the pump housing can impair pumping performance.

9
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 fittings before connecting them to the inlet connector
assembly..
1.13 Supply pipework MUST be ushed to clear debris before connecting the
Elite ST.
1.14 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 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, tted in the inlet supply to the appliance, cause a
pressure build-up, which could exceed the maximum static inlet pressure for
the appliance.
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
1.15 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.
1.16 Avoid layouts where the hose will be
sharply kinked. This may reduce the
life of the hose.

10
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

11
2. Electrical
Read the section 'Important Safety Information' rst.
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
Checklist
2.1.1 Electrical supply fuse and consumer unit are adequate for the product.
2.1.2 Shower unit is earthed.
Caution! For the Mira Elite ST 10.8 kW model the minimum required supply cable
size is 10 mm2.
2.1.3 The minimum required supply cable size must conform to BS 7671.
Note! The terminal block will not accept cable larger than 16 mm2.
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.
2.1.8 Unless otherwise stated, electrical equipment such as extractor fans, pumps
must not be connected via this product.

12
2.2 Electrical (checklist in detail)
2.2.1In 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.
2.2.2The 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).
2.2.3Supply cable - refer to: 'Electrical Checklist'.
2.2.4As 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).
10.8 kW @ 240 V / 45 Amps (9.9 kW @ 230 V / 45 Amps).
A 30m 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.
2.2.5DO NOT twist the individual cable cores of either the live or neutral conductors,
as this will prevent them from entering the terminal block.
2.2.6DO NOT exert strain on the terminal block. Ensure that the electrical connections
are tightly screwed down.
2.2.7DO NOT turn on the electrical supply until the plumbing has been completed.

13
INSTALLATION
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.
Remove the cover and
determine supply pipe
position.
For rear inlet, use soldered
elbow. Do not trap green
wire.
Fit Rubber Feet and fix
appliance to wall.
Flush a minimum of 10
litres through pipework.
1. 2. 200 mm 3.
4. 5. 6.
7. 8. 9.
Hold the product on the
wall in the desired location
and mark the positions of
the xing holes.
Remove the product from
the wall.
Drill the three holes.
(Wall xings are not supplied.
For solid wall structures a red
rawl plug and a no. 8 x 1½”
countersunk brass or stainless
steel screw should be used.
For other wall structures such
as panels alternative xings
may be required. A minimum
of 3 xing screws should be
used)

14
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 t 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
Having completed the installation make sure the user is familiar with the operation
of the appliance.

15
COMMISSIONING
Electrical supply is turned
off at the mains.
Turn BOTTOM control to
full cold.
Turn water supply fully
on.
Switch on electrical
supply.
Check for water leaks. Turn TOP control to
LOW.
1. 2. 3.
4. 5. 6.
7. 8. 9.
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
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 User
Instructions section before continuing.

16
Turn BOTTOM control to
full cold.
The temperature will rise
slightly.
10. 11. 12.
_
+
0-5 secs
Set the TOP control to
MEDIUM.
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

17
Operation of the Mira Elite ST
=
=
=
COLD
Stop Start
+
-
+
-
High
Medium
Low
USER INSTRUCTIONS

18
A small amount of water may
continue to drain over a few
minutes.
Press STOP button. Shower will
continue to run for a few seconds
before stopping.
_
+
Switch on electrical supply. Press START button.
Set to desired position.
Allow 10-15 seconds for any temperature adjustments to reach the handset.
Care is required when adjusting ow or temperature, make sure that the
temperature has stabilised.
_
+
Check water temperature before
entering shower.
1. 2.
3. 4.
6. 7.
5.
Power
Using Your Shower
Read the section 'Important Safety Information' rst.
Note! Rapid/Excessive movement of the ow and/or temperature control levers
may result in momentary unstable blend temperatures.

19
FAULT DIAGNOSIS
The trouble shooting information 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
shower. Only a competent tradesperson should remove the front cover!
Symptom Power
Light
Low
Flow
Light
Heater
Setting
Low / Med /
High
Probable Cause Possible Remedy
Elite ST fails to
operate.
OFF
OFF
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 pullcord or wall mounted
switch.
Renew the fuse or reset the
MCB/RCD. If fault persists,
contact your installer.
No water or very
low ow rate.
ON
ON
ON
ON
ANY
ANY
Hose or handset sprayplate
blocked.
Incoming water supply
isolating valve turned down
or off.
Remove and clean.
Turn isolating valve to fully
on position.
Shower cycles
from hot to cold.
ON
ON
OFF
ON
MED / HIGH
MED / HIGH
Temperature knob or heater
setting too high.
Handset sprayplate blocked.
Turn the TOP knob to
MEDIUM setting and
re-adjust temperature knob
until suitable temperature is
achieved.
Remove and clean.
Unable to select
a cool enough
temperature.
ON
ON
OFF
ON
HIGH
MED / HIGH
Due to a rise in the stored
water temperature, the power
rating may be too high.
Handset sprayplate blocked.
Turn the TOP knob to
MEDIUM setting and
re-adjust temperature knob
until suitable temperature is
achieved.
Remove Handset and clean.
No water and
motor tone
increases.
ON
ON
ON
ON
ANY
ANY
Cistern has run out of water.
Internal pump unit faulty or
thermal trip has operated.
Turn off the Elite ST
immediately and resolve
cistern storage difculty.
Wait for internal pump /
shower to cool down. If still
faulty contact your installer.
Handset
dripping.
OFF OFF ANY Flow Valve faulty Replace
Water will not
turn off.
ON OFF MED/HIGH Flow Valve, Solenoid or Start/
Stop switch faulty
Replace parts as required.

20
All the following remedies must be performed by a competent tradesperson!
Symptom Power
Light
Low
Flow
Light
Heater
Setting
Low / Med /
High
Probable Cause Possible Remedy
Low or no ow. ON
ON
ON
ON
ON
ON
ON
ON
ON
OFF
OFF
OFF
OFF
OFF
ANY
ANY
ANY
ANY
ANY
ANY
ANY
Filter or water supply
pipework restricted by a
blockage or partial blockage.
Insufficient water supply
pressure / ow for operation.
Hose or handset sprayplate
blocked.
Flow Valve faulty.
Heater tank excessively
scaled.
Service tunnel or cover not
tted correctly causing Start/
Stop button not to operate.
Pump faulty.
Flush supply pipe. Clean
lter.
Gravity fed system, minimum
pressure 0.8 kPa (0.008 Bar
/ 80 mm).
Remove and clean.
Replace.
Replace. In hard water areas
consider the use of a water
softener.
Check case inserts are
cut and fitted correctly.
Check services (electrical /
plumbing) are not interfering
with the location of service
tunnel or cover.
Replace.
Operation of
Temperature
Control has
little or no
effect on water
temperature.
ON
ON
ON
ON
ON
OFF
OFF
OFF
MED / HIGH
MED / HIGH
MED / HIGH
MED / HIGH
Hose, handset or Filter
blocked.
Flow Valve faulty.
Heater Tank failure.
Microswitch failure.
Remove and clean.
Replace.
Replace.
Replace.
No change in
temperature
between Low
/ Med / High
settings.
ON OFF ANY Possible Flow Valve,
Microswitch or Heater Tank
failure.
Check the continuity of
the Microswitch or Heater
Tank and replace parts as
required.
Appliance fails
to produce hot
water when set
on Med / High
heater setting.
ON
ON
FF
OFF
MED / HIGH
MED / HIGH
Possible Microswitch or
Thermal Switch failure.
Possible Heater Tank failure.
Check the continuity of
the Microswitch or Heater
Tank and replace parts as
required.
Replace.