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THERMOSTATIC
POWER SHOWER
Installation and User Guide
These instructions are to be left with the user
1
CONTENTS
Introduction.............................................................................................. 3
Patents.................................................................................................. 3
Important Safety Information.................................................................. 4
Warning!................................................................................................ 4
Caution!................................................................................................. 6
Pack Contents.......................................................................................... 7
Dimensions............................................................................................... 8
Specifications........................................................................................... 9
Installation Requirements..................................................................... 10
Installation.............................................................................................. 11
General................................................................................................ 11
Electrical.............................................................................................. 11
Plumbing............................................................................................. 12
Commissioning...................................................................................... 19
Maximum Temperature Setting........................................................... 20
Disabling the Temperature Override Button........................................ 22
Operation................................................................................................ 23
Fault Diagnosis....................................................................................... 25
Fault Diagnosis - User Maintenance................................................... 25
Fault Diagnosis - Installer Maintenance.............................................. 26
Maintenance............................................................................................ 28
Cleaning.............................................................................................. 28
Handset............................................................................................... 28
Spare Parts............................................................................................. 29
Accessories............................................................................................ 30
Notes....................................................................................................... 31
Customer Service................................................................................... 32
2
INTRODUCTION
The Mira Vigour Thermostatic Power Shower is an all-in-one power shower with
an integral mains voltage pump and separate controls for flow and temperature. It
features a 15 mm dual entry push-fit manifold which supports various inlet supply
configurations. The manifold includes inlet filters and check valves. The thermostatic
mixer incorporates a wax capsule sensing unit.
Designed to be surface mounted, the Thermostatic Power Shower comes complete
with an adjustable spray handset with three settings, flexible hose, adjustable slider,
sliding rail, soap tray and bracket.
Patents
Patents
Patent Applications
GB: 2 340 210, 2 392 223, 2 392 224, 2 392 225
USA: 7 240 850
Euro: 03254070.0
Guarantee
For domestic installations, Mira Showers guarantee the Mira Vigour Thermostatic
against any defect in materials or workmanship for a period of one year from the
date of purchase (shower fittings for one year).
For non-domestic installations, Mira Showers guarantee the Mira Vigour Thermostatic
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
Power Shower
Power Shower with
Fittings
Domestic


Light Commercial


Heavy Commercial


Application
If you experience any difficulty with the installation or operation of your new Power
Shower, please refer to ‘Fault Diagnosis’, before contacting Kohler Mira Ltd. Our
telephone and fax numbers can be found in the back of this guide.
3
IMPORTANT SAFETY INFORMATION
Warning!
1. Read all of these instructions and retain this guide for later use.
2. 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.
3. THIS APPLIANCE MUST BE EARTHED. MAKE SURE SUPPLEMENTARY
BONDING COMPLIES WITH THE ‘REQUIREMENTS FOR ELECTRICAL
INSTALLATIONS’ BS7671.
4. This product is suitable for installation within Zone 1 and is rated IP X4.
5. This product is not suitable for areas with very high humidity (i.e steam rooms).
Please consult your installer.
6. In accordance with ‘The Plugs and Sockets etc. (Safety) Regulations’ in force at
the time of installation, this appliance is intended to be permanently connected
to the fixed electrical wiring of the mains system.
7. Turn off the electrical and water supplies before commencing installation. The
electricity must be turned off at the mains and the appropriate circuit fuse
removed, if applicable.
8. Refer to the wiring diagram before making any electrical connections.
9. This appliance must be provided with means for disconnection that is incorporated
into the fixed wiring in accordance with the relevant local wiring regulations
10. Make sure all electrical connections are tight, to prevent overheating.
11. DO NOT twist the individual cable cores of the live and neutral conductors, as
this will prevent them from entering the terminal block.
12 Switch off the appliance at electrical isolating switch when not in use. This is
for safety and is recommended with all electrical appliances.
13. DO NOT install the product in a position in which service access is restricted.
14. DO NOT install the appliance in a position where it may become frozen.
15. Make sure that any pipework that could become frozen is properly insulated.
16. DO NOT switch on if there is a possibility that the water in the appliance is
frozen. The shower unit must not be fitted where it may be exposed to freezing
conditions.
17. The water supplies to this product must be isolated if the product is not to be
used for a long period of time. If the product or pipework is at risk of freezing
during this period they should also be drained of water.
18. DO NOT fit any form of outlet flow control as the outlet acts as a vent for the
tank body. Only Mira Showers recommended outlet fittings should be used.
19. If the shower is dismantled during installation or servicing then upon completion
the product must be inspected to ensure there are no leaks.
4
20. DO NOT commission this appliance if water leaks from the unit.
21. DO NOT operate this appliance if water leaks from this appliance.
22. Only a competent person should remove the front cover. We recommend
any maintenance work is carried out by a Mira Service Engineer or qualified
tradesperson.
23. Mains connections are exposed when the cover is removed. Isolate the electrical
and water supply before removing the cover.
24. 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 fitted and water has entered the appliance 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 the shower is frozen
25. The shower head must be de-scaled regularly. Lack of regular shower head
cleaning will lead to poor performance and cause early failure of the appliance.
Refer to the Shower Fittings User Guide for more information.
26. Unless otherwise stated, electrical equipment such as extractor fans, pumps
must not be connected via this product.
27. If pipework and/or electical 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.
28. Care is required when adjusting flow or temperature, make sure that the
temperature has stabilised.
29. Rapid/Excessive movement of the flow and/or temperature control levers may
result in momentary unstable blend temperatures.
30. DO NOT position the handset to spray water directly on to the appliance.
Eg.When cleaning shower control.
31. Make sure that you fully understand how to operate this shower and make sure
that it is properly maintained in accordance with the instructions given in this
manual.
32. Having completed the installation, make sure that the user is familiar with the
operation of the appliance.
33. 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.
5
Caution!
1. Read all of these instructions and retain this guide for later use.
2. Make sure that this guide is left with the user. Pass on this guide in the event
of change of ownership of the installation site.
3. Follow all warnings, cautions and instructions contained in this guide, and on
or inside the shower.
4. Installation must be carried out in accordance with these instructions, and must
be conducted by designated, qualified and competent personnel.
5. The electrical installation must comply to ‘BS 7691 Requirements for Electrical
Installations’ (commonly referred to as the IEE Wiring Regulations Part 7, 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:
• National Inspection Council for Electrical Installation and Contracting
(NICEIC), throughout the UK
• The Electrical Contractors Association (ECA), England and Wales
• The Electrical Contractors Association of Scotland (ECAS)
6. The plumbing installation must comply with the requirements of UK Water
Regulations/Bye-laws (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:
• Institute of Plumbing (IOP), throughout the UK
• National Association of Plumbing, Heating and Mechanical Services
Contractors (NAPH & MSC), England and Wales
• Scottish and Northern Ireland Plumbing Employers’ Federation (SNIPEF),
Scotland and Northern Ireland
7. This appliance 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 appliance by a person responsible for their safety.
8. Children should be supervised to make sure that they do not play with the
appliance.
9. Sunburn or skin conditions can increase your sensitivity to hot water.
6
PACK CONTENTS
 Tick the appropriate boxes to familiarise yourself with the part names and to

confirm that the parts are included.
 1 x Thermostatic Power Shower
 4 x Case Inserts
 1 x Flow Control Knob
 1 x Temperature
Indicator Trim
 1 x Installation and User Guide
 1 x Guarantee Registration Document
 1 x Temperature Control Knob
 3 x Rubber Wall Plugs
 3 x Fixing Screws
 1 x Push-Fit Release Tool
 3 x Rubber Feet
7
DIMENSIONS
130
210
20
28
310
20
28
88
All dimensions are nominal and in millimetres.
8
66
80
SPECIFICATIONS
Electrical
Power supply - 230-240 V at 50 Hz, fused at 3 Amps, via a double pole fused switch
(not supplied) with a minimum contact separation of 3 mm for each contact.
Electrical Connections - Terminal block will accept cable up to 2.5 mm². Minimum cable
size (cross-sectional area) required under normal installation conditions is 1 mm2.
Power Consumption - 150 W maximum.
Plumbing Connections
Inlet Connections - 2 x 15 mm Push-fit manifold.
Outlet Connection - 1/2” BSP male.
Operating Parameters
Cold water temperature - Maximum inlet temperature 30 °C
Hot water temperature - Maximum inlet temperature 65 °C
Warning! For safety reasons set the maximum temperature of the stored hot water to
between 60 and 65 °C. Such temperatures are considered sufficient to meet all normal
requirements and will minimise the deposition of scale in hard water areas.
Temperature Control - The maximum temperature stop is set to 41 °C. Depressing
the override button overrides the maximum temperature and allows the showering
temperature to be increased by 5 °C to approximately 46 °C.
The showering temperature will be maintained to within 1 °C of selected temperature
with a 10 °C change in the hot or cold water supply.
If the cold supply fails the thermostatic mixer will shut down flow of water to seepage
levels in approximately 2 seconds. The hot supply must be at least 12 °C above the
blend temperature for shut down to seepage to occur.
The showering temperature will be maintained to within 1.5 °C of the selected showering
temperature when the pressure between inlet and outlet is halved on either the hot
or cold side.
Operating pressure
Minimum maintained pressure - 0.1 kPa (0.01 bar) or 100 mm head of water.
Maximum maintained pressure - 50 kPa (0.5 bar).
Maximum static pressure - 100 kPa (1 bar) or 10 m head of water.
Duty Cycle - The Mira Vigour Thermostatic Power Shower pump is now continuously
rated. The motor is fitted with a self-resetting thermal trip, designed to operate if motor
temperatures become too high due to abnormally high supply voltages.
Noise - The acoustic noise from the pump motor has been reduced with the use of
anti-vibration rubber feet and rubber wall plugs. The type of wall the appliance is fixed to
will also affect the perceived noise level; solid walls will provide a quieter operation.
Standards
The Mira Vigour Thermostatic Power Shower complies with all relevant directives for
CE marking.
9
INSTALLATION REQUIREMENTS
Gravity Fed system - The shower MUST be fed from a cold water cistern and hot
water cylinder providing nominally equal pressure.
30° - 60°
10 m Maximum
80 mm Minimum
10
INSTALLATION
General
1. Do not take risks with plumbing or electrical equipment.
2. Do not install the shower unit in a position where it could become frozen.
3. Isolate electrical and water supplies before proceeding with the installation of
the shower unit.
4. The shower unit must be fed from a cold water storage cistern and hot water
cylinder with equal pressures. The shower unit must not be connected to a mains
cold water supply, unvented high pressure systems or multipoint/combination
gas water heaters.
5. The installation must be carried out by a competent installer.
6. Decide on a suitable position for the shower unit (minimum distance of 200 mm
from the ceiling to allow for the fitting and removal of the cover). The position of
the appliance and the shower fittings must provide a minimum gap of 25 mm
between the spillover level of the shower tray/bath and the handset, to prevent
back siphonage.
7. Avoid layouts where the hose will be sharply kinked. This may reduce the life
of the hose.
8. The shower unit is designed for surface mounting only and must not be recessed
into any wall or cavity, or tiled up to, as this prevents air circulating to the rear
of the unit.
Electrical
1. The shower unit 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 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 mm2 if mechanically protected).
2. Power supply cable must have a minimum cross sectional area of 1 mm².
3. Power supply must be 230-240 V at 50 Hz. The isolating switch must be double
pole switched, fused at 3 Amps, with at least a 3 mm contact separation gap to
each pole.
4. Do not turn the electrical supply on until all plumbing connections have been
made and the shower unit has been commissioned as the unit must not be
operated dry.
5. A 30 mA RCD (residual current device) must be fitted. This may be part of the
consumer unit or a separate unit.
6. Fuses do not give personal protection against electric shock.
11
Plumbing
1.A minimum storage capacity of cold water of 230 litres (50 gallons) is required
to provide adequate showering time. Insufficient storage may result in the pump
being run dry.
2. Layout and sizing of pipework must be such that nominally equal inlet supply
pressures are achieved and the effects on the shower performance of other
draw-offs are minimised. Make sure the shower unit is the first draw-off from
the water supply.
3. Avoid routing the high level hot feed pipe upward to the same level as the cold
tank e.g. into loft space, as air locks may result.
4. Do not solder supply pipework connected to the shower unit as heat transfer
may damage plastic components.
5. Do not use jointing compounds on the shower unit joints, they may cause
damage to the mechanism inside.
6. Do not insert fingers into the push fit connections.
7. The supply pipe ends must be free from burrs, as these will damage the push
fit seals.
8. Do not use stainless steel piping for inlet pipework.
9. If plated tubing is used for inlet pipework remove the plating from the last 25 mm
of the tube to make sure of a good seal.
10. 15 mm polythene plastic pipe suitable for hot water may be used to supply the
shower unit, but internal pipe supports must be used.
11.Supplies must be thoroughly flushed to remove any debris before connecting
the shower unit.
12. Fit non-restrictive (free-flowing) isolating valves in the inlet pipework to the
appliance. Make sure that you can access the isolating valves easily.
12
Warning! Do not fix the shower unit to the wall until plumbing and electrical
installations have been completed.
1. Decide on a suitable location for
the shower unit avoiding buried
cables and pipes. The unit should be
positioned at a height convenient for
all the family (at least 200 mm below
the ceiling to allow for the fitting and
removal of the unit cover).
The handset should spray away from
the shower unit, either down the
centre line of the bath or across the
shower cubicle opening. Make sure
when the hose retaining ring is placed
on the lowest position on the slide bar,
the handset does not fall below the
minimum clearance gap, between
the bath or shower tray spillover level
of 25 mm.
2. Hot and cold inlet supply connections
are:
Hot – Left
Cold ­– Right
Run the hot and cold water supply
pipes at 28 mm centres, make sure
that the pipe ends project 30 mm into
the inlet manifold.
Warning! Supply connections must
not be connected in reverse.
Caution! Do not use stainless steel
piping for inlet pipework.
Caution! If the pipework is chrome
plated remove all traces of chrome
from the connecting surfaces. If the
chrome is not removed then the
inlet manifold collets will not grip the
supply pipe.
13
Hose Retaining Ring
25 mm Minimum
Spillover level
Miniature Trunking
275
30
28
H
All dimensions in millimetres
C
30
3. Make sure that the end of the supply
pipework is cut squarely and is free
from burrs, which will damage the
inlet manifold seals.
Chamfer the end of the pipe to assist
insertion into the fitting and prevent
the ‘O’ seal tearing.
Warning! Do not insert fingers into
the push-fit connectors as this can
result in injury.
Caution! Thoroughly flush the
incoming hot and cold water supply
pipes to remove debris before
connecting the shower unit.
Chamfer
Trim the thinned section of
the case covering the cable
channel.
4. Run the electrical supply cable in
surface mounted miniature trunking
(not supplied). Allow sufficient cable
to connect to the terminal block
(approximately 275 mm). Strip back
approximately 30 mm of outer cable
insulation.
5. Loosen the three cover securing
screws and remove the shower unit
cover.
Note! The cover securing screws
are captive and should not be
unscrewed fully from the unit case.
6. Insert the push-fit release tool
between the flange of the blanking
plug and the inlet manifold collet
and lever the plugs outward. Whilst
holding back on the collet, pull out
the appropriate blanking plug by
hand.
Securing Screw
Securing
Screws
Blanking Plug
Collet
Push-fit
Release Tool
Inlet Manifold
14
7. Temporarily locate the shower unit.
8. Position the shower unit on the wall
and mark the three fixing points.
Note! Installers may wish to obtain
alternative proprietary cavity fixings
for dry lined, stud partition or dry
partition wall structures.
9. Use the push-fit release tool to push
the grey collars into the manifold to
release the shower unit from the
supply pipes.
Warning! Make sure there are no
buried cables or pipes near the fixing
points before drilling.
Fixing Points
10. Drill 9.5 mm holes and fit the wall
plugs supplied.
11. Cut away and trim the thinned
section at the top or bottom of the
case to allow the electrical supply
cable to run down the rear of case.
15
12. Fit the three rubber feet into the
recesses in the rear of the case
as shown. The feet will reduce the
noise transmitted by the power
shower through the wall.
Warning! Blanking plates should be
fitted to stop water ingress into the
inside of the unit.
13. Fit the blanking plates to the unit
case in the following manner.
Rubber Feet
Fit the half
blanking plate
to the top of the
case.
For Top Inlet Pipework
Fit the full blanking
plate to the bottom
of the case.
For Rear Inlet Pipework
Fit the full blanking
plates to the top
and bottom of the
case.
Fit the full blanking
plate to the top of
the case.
For Bottom Inlet Pipework
Fit the half
blanking plate to
the bottom of the
case.
16
14. Locate the shower unit on the inlet
supplies and push the inlet manifold
onto the pipework until resistance is
felt.
DO NOT FORCE!
Note! PTFE tape or liquid jointing
compound must not be used and is
not required to assist connection.
15. The inlet manifold collet and ‘O’
seals will seal automatically.
Warning! The shower unit must
be fixed to the wall at all three
fixing points. The fixing holes are
elongated to assist in vertical and
horizontal alignment.
16. Screw the shower unit to the wall
using either the wall screws supplied
or alternative fixings depending on
the wall structure.
Do not over tighten!
Make sure that the electrical supply
cable is correctly seated in the
channel in the back of the case.
17. Connect the live, neutral and earth
conductors of the electrical supply
cable to the terminal block in the
following manner.
L - Live terminal block
N - Neutral terminal block
- Earth terminal block
The earth supply cable must be
sleeved and make sure that all the
terminal connections are tight and
that no insulation is pinched.
18. Make sure the flow control gear is
set to the OFF position by turning
the gear wheel anticlockwise until it
stops. DO NOT force the gear wheel
as damage will occur.
Gear Wheel
17
19. Refit the unit cover and secure with
the three cover securing screws.
OFF Position
20. Insert the flow control knob in the
OFF position.
21. Insert the temperature indicator trim
and the inner temperature control
knob.
22. The power thermostatic shower will
now require commissioning, refer to
COMMISSIONING.
Flow Control Knob
Arrow/OFF
Position
23. Install the shower fittings, refer to the
instruction manual supplied with the
fittings.
Temperature
Indicator Trim
Inner
Temperature
Control Knob
18
COMMISSIONING
The unit must not be run dry. Before proceeding any further with the installation the
shower unit must be commissioned.
1. Connect the flexible hose to the outlet
of the shower unit.
Caution! Do not over tighten.
Hose Washer
Hose
2. Turn on the water supplies and check
for leaks.
3. Switch on the electrical supply.
Maximum
Flow Position
4. Tu r n t h e o u t e r f l o w c o n t r o l
anticlockwise to full flow.
Outer Flow Control
Temperature Indicator
Warmer
5. Rotate the inner temperature control
anticlockwise to check the hot supply
and clockwise to check the cold
supply.
Cooler
Inner Temperature
Control
6. Turn the flow control clockwise to the
OFF position.
7. T h e s h o w e r
commissioned.
unit
is
now
Outer Flow Control
19
OFF Position
Maximum Temperature Setting
It may be necessary to adjust the maximum temperature for site conditions to make
sure of safe showering from the unit. Make sure that the hot water temperature is at
least 12 °C above the required temperature for correct operation of the thermostatic
power shower.
To reset the maximum outlet temperature follow the sequence below :
1. Tu r n t h e o u t e r f l o w c o n t r o l
anticlockwise to maximum flow.
2. Turn the inner temperature control
knob anticlockwise to the maximum
temperature stop. Do not depress
the override button.
Maximum
Flow Position
Outer Flow Control
Maximum Temperature Position
3. Check the shower temperature.
4. If the maximum temperature requires
adjustment then remove the outer
flow control and the inner temperature
control knobs. Slide the end of the
push-fit release tool under the outer
flow control, lever the outer flow
control and the inner temperature
control knobs off together from the
shower unit.
5. Remove the small label covering the
retaining screw on the temperature
hub. Unscrew the retaining screw and
remove the temperature hub.
Note! This will void the factory
setting.
20
Inner Temperature Control Knob
Temperature
Hub
Temperature Hub
Retaining Screw
Caution! When resistance is felt DO
NOT USE FORCE to turn the spindle any
further as this is the maximum shower
temperature obtainable with the available
hot water storage temperature. FORCE
will DAMAGE the internal components.
6. Turn the temperature spindle until the
maximum water temperature required
is obtained.
Warmer - Turn spindle anticlockwise
Cooler - Turn spindle clockwise
Temperature Spindle
7. Insert the temperature hub with the pip
on the temperature hub aligned with
the slot on the thermostatic cartridge.
Secure the temperature hub with the
retaining screw.
8. Insert the outer flow control knob in
the maximum flow position.
9. Insert the temperature indicator trim
and the inner temperature control
knob.
Caution! If resistance is felt when
turning the inner temperature control
knob, DO NOT USE FORCE to
turn the knob any further as this will
DAMAGE internal components.
10. Make sure the inner temperature
control knob can be fully turned in
both directions.
Align the pip on the
temperature hub with the slot in the
thermostatic cartridge.
Temperature Indicator Trim
Maximum Flow Position
11. Check the maximum temperature
setting. If necessary repeat the
temperature adjustment until the
required temperature is achieved.
21
Inner Temperature Control Knob
Disabling the Temperature Override Button
The temperature override button allows the user to override the preset maximum
temperature. The temperature override button should be disabled if the power shower
is to be used by the young, the elderly, the infirm, or anyone inexperienced in the
correct operation of the controls.
Follow the instructions below to disable the temperature override button:
1. Turn the outer flow control knob
clockwise to the off position and
the inner temperature control knob
clockwise to full cold.
2. Slide the end of the push-fit release
tool under the outer flow control knob
and lever the control knob assembly
off the shower unit.
3. Unclip the concealed end of the
override button from the temperature
indicator trim and carefully remove the
override button.
Off Position
Full Cold Position
4. Rotate the override button through
half a turn (180°) and refit. Make sure
the override button is flush with the
temperature indicator trim.
5. Insert the outer flow control knob in
the off position.
6. Insert the temperature indicator trim
and the inner temperature control
knob. Make sure the inner temperature
control knob is pushed fully onto the
temperature hub.
Temperature Indicator Trim
Override Button
Flow Control Knob
Arrow / OFF
Position
7. The temperature override button is
now disabled.
Inner Temperature
Control Knob
22
OPERATION
For safety reasons this appliance is fitted
with an adjustable maximum temperature
setting. This must be checked and adjusted
as necessary to suit both site conditions
and user’s comfort.
1. Turn the outer flow control knob
until the desired flow of water is
obtained. The flow of water will
increase the further the control is
turned anticlockwise.
Outer Flow Control Knob
2. Turn the inner temperature control
anticlockwise for warmer water
and clockwise for cooler water,
the numbers indicate the relative
temperature:
1 = cold, 4 = tepid, 7 = Hot
Warning! Operation of the override
button will allow a shower temperature
above the preset maximum.
Warmer
Cooler
Inner Temperature Control Knob
23
3. To override the preset maximum
temperature press the override
button and turn the inner
temperature control knob
anticlockwise.
Press the Override Button and turn the Inner
Temperature Control Knob anticlockwise.
4. Turn the outer flow control knob
fully clockwise to stop the flow
of water.
Off Position
Outer Flow Control Knob
24
FAULT DIAGNOSIS
Fault Diagnosis - User Maintenance
The appliance is fully performance tested after assembly. Providing it has been
correctly installed and is operated as advised, difficulties should not arise. In the
unlikely event that you experience problems with your appliance then the following
procedure will enable you to undertake basic fault finding before contacting the
person responsible for installing your shower.
Malfunction
Maximum
showering
temperature too
hot.
Shower
temperature too
cold.
Cause
Maximum temperature
incorrectly set.
Remedy
Reset maximum temperature,
refer to COMMISSIONING.
Hot water cylinder
temperature less than 12 °C
above shower temperature.
Adjust cylinder temperature.
Note! It is recommended
stored water temperatures do
not exceed 65 °C.
Reset maximum temperature,
refer to COMMISSIONING.
Clean spray plate, refer to the
instruction manual supplied
with the shower fittings.
Contact your installer.
Open valve.
Maximum temperature
incorrectly set.
Blend temperature Spray plate blocked.
unstable.
Pump does not
operate.
Low or no water
flow.
Inlet filters blocked.
Isolating valve partially
closed.
Plumbing system fault.
Electrical supply failure.
PCB or Potentiometer failure.
Motor overheated, thermal
switch operated.
Contact your installer.
Contact your installer.
Contact your installer.
If the thermal switch operates
repeatedly contact customer
support for further advice.
Isolating valves closed.
Open the isolating valves.
Inlet filters blocked.
Contact your installer.
Check valve fitted incorrectly. Contact your installer.
Appliance sited above cold
The appliance is not suitable
water storage cistern.
for negative head installations,
refer to INSTALLATION
REQUIREMENTS.
Plumbing system fault
Contact your installer.
(airlock).
25
Fault Diagnosis - Installer Maintenance
The Thermostatic Power Shower is one part of an entire plumbing system. The fitting
of a pump places additional requirements on the plumbing system. Some systems
may require plumbing modifications to allow them to cope with higher flow rates.
Providing the Thermostatic Power Shower has been correctly installed and is
operated as advised, difficulties should not arise. Fault diagnosis and maintenance
must be carried out by a competent person for whom the fault diagnosis table is
provided.
In the event of any of the following tests failing, re-check as appropriate before
contacting the Mira Showers Customer Support Department, refer to the back cover
of this guide.
Malfunction
Shower runs
for a short time
(30-60 seconds)
then flow reduces,
splutters or stops.
Aggravated when
other hot taps
are in use. Less
evident on full
cold.
Shower runs cool
after a short time
(1-2 minutes) then
flow splutters.
Flow of water
virtually stops
and surges
on/off, after a few
minutes.
Shower runs
cold after
5‑10 minutes.
Shower
temperature
affected by use of
adjacent hot/cold
tap.
Maximum shower
temperature too
hot.
Cause
Air is being sucked down the
vent pipe, as the hot take off
to the shower is too high up
the pipe.
Remedy
Refer to the plumbing system
diagram in the INSTALLATION
REQUIREMENTS for the
correct connection method.
Note the 1 metre hot
takeoff dimension. Consider
increasing the cold feed pipe
to the cylinder to 28 mm
diameter.
Air entering the hot pipework. Refer to the plumbing system
diagram in the INSTALLATION
REQUIREMENTS for the
correct connection method.
Insufficient storage of cold
Increase storage size of the
water in cistern
cold water cistern.
(230 litres recommended).
Insufficient storage of hot
water in cylinder.
Increase the storage size of
the hot water cylinder.
Insufficiently sized pipework
for both systems to be used
together.
Increase the pipe sizes or
separately feed the shower.
Refer to the plumbing system
diagram in the INSTALLATION
REQUIREMENTS.
Reset maximum temperature,
refer to COMMISSIONING.
Maximum temperature
incorrectly set.
26
Malfunction
The maximum
shower
temperature is too
cold.
The blend
temperature is
unstable.
Drip from the
shower head.
The pump does
not operate.
Cause
Hot water cylinder
temperature less than
12 °C above the showering
temperature.
Remedy
Adjust the cylinder
temperature. Note! It is
recommended that the stored
water temperature does not
exceed 65 °C.
Maximum temperature
incorrectly set.
Reset the maximum
temperature, refer to
COMMISSIONING.
Clean the spray plate, refer to
the instruction manual supplied
with the shower fittings.
Spray plate blocked.
Inlet filters blocked.
Clean the inlet filters.
Isolating valve partially
closed.
Solenoid valve failure.
Open the isolating valve.
Electrical supply failure.
Renew the solenoid valve
assembly.
Check the power supply.
PCB failure.
Renew the PCB.
Potentiometer failure.
Renew the harness assembly.
Motor overheated, thermal
switch operated.
If the thermal switch operates
repeatedly contact customer
support for further advice.
Renew the harness assembly.
The pump does
Potentiometer failure.
not stop or change
PCB failure.
speed when
the flow knob is
turned.
Low or no water
Isolating valves closed.
flow.
Inlet filters blocked.
Renew the PCB.
Open the isolating valves.
Clean the inlet filters.
Appliance sited above cold
water storage cistern.
The appliance is not suitable
for negative head installations,
refer to the INSTALLATION
REQUIREMENTS.
Plumbing system fault
(airlock).
Re-route the pipework to avoid
airlock.
Blocked spray plate.
Clean the spray plate, refer to
the instruction manual supplied
with the shower fittings.
27
MAINTENANCE
Warning! There are no user serviceable components beneath the cover of the
appliance. Only a competent tradesperson should remove the cover.
Before removing the cover, the electricity supply must be turned off at the mains
and if applicable, the appropriate circuit fuse removed. Mains electrical connections
are exposed when the cover is removed.
Before replacing any parts make sure that the underlying cause of the malfunction
has been resolved.
Cleaning
Many household cleaners contain abrasives and chemical substances, and should
not be used for cleaning plated or plastic fittings. These finishes should be cleaned
with a mild washing up detergent or soap solution, and then wiped dry using a soft
cloth.
Handset
Poor shower performance can be avoided by regular cleaning of the handset. Use
your thumb or soft cloth to wipe the rubber nozzles. The handset must also be
descaled regularly.
28
SPARE PARTS
147.67
453.01
453.03
453.07
453.08
453.12
453.13
453.14
453.15
453.22
Check Valve Pack
Cartridge - Thermostatic
Motor Pump Assembly - components identified ‘A’
Inlet Manifold Assembly - components identified ‘B’
PCB Assembly - Power
Harness Assembly - Concentric - components identified ‘C’
Solenoid Valve Assembly - components identified ‘D’
Filter/Cap Assembly
Seal Pack - components identified ‘E’
Stud Wall Fixing Kit (Push-fit Release Tool, 3 x Fixing Screws,
3 x Rubber Wall Plugs) - components identified ‘H’
453.23
Mixer Valve Body - components identified ‘F’
453.24
Inserts/Rubber Feet Pack - Power - components identified ‘G’
453.28
Outlet Elbow Assembly
1532.332 Control Knob Assembly
1532.365Cover
H
A
G
A,D,E
453.08
A
E
C
G
A,F
E,G
H
B
D
D,E
C
1532.365
147.67
G
E
B
B,E,F
453.01
H
453.28
453.14
29
1532.332
ACCESSORIES
Genuine Mira accessories can be purchased direct from Customers Services (our contact details can
be found on the back cover of this guide) or from approved stockists or merchants.
Eco Showerhead
White - 2.1668.001
Chrome - 2.1668.002
The Eco shower head gives
you an invigorating shower, but
reduces water consumption and
heating costs.
Everclear Showerhead
White - 2.1616.030
Chrome - 2.1616.031
Mira's new Everclear range has
been specially designed for hard
water areas and reduces the risk
of lime scale build up.
Premium Shower Seat
White/Chrome - 2.1731.001
Grey/Chrome - 2.1731.002
Stylish, slim-line and robust
shower seat for use in or outside
of the shower area. Folds up when
not in use. Maximum User Weight
- 150 kg (23.5 stone) Note! Must
be installed onto a solid wall.
Shower Seat
White - 2.1536.128
White/Chrome - 2.1536.129
For use in or out of the showering
area. Folds up when not in use.
Maximum User Weight - 127 kg
(20 stone) Note! Must be installed
onto a solid wall.
Double Outlet Check Valve
(DCV-H)
Chrome - 1.0.110.55.1
An outlet double check valve,
designed to prevent the back flow
or back-siphonage of potentially
contaminated water, through
shower controls which are fitted
with a flexible shower hose as part
of the outlet shower fitting.
30
NOTES
31
CUSTOMER SERVICES
Guarantee
What to do if something goes wrong
Your product has the benefit of our manufacture's
guarantee which starts from date of purchase. This
guarantee only applies in the United Kingdom and
Republic of Ireland. To activate this guarantee, please
return your completed registration card, visit our
website or free phone 0800 5978551 within 30 days
of purchase (UK only).
If your product does not work correctly refer to this
manual for fault diagnosis and check that it is installed
and commissioned in accordance with our instructions.
If this does not resolve the issue, contact us for help
and advice.
Helpdesk Service
Contact our Customer Services Team for
product advice, to purchase spare parts or
accessories or to set up service visit. You can contact
us via phone or e-mail - contact details below.
Please provide your model name, power rating (if
applicable) and date of purchase.
Within the guarantee period we will resolve defects in
materials or workmanship, free of charge, by repairing
or replacing parts or product as we may choose.
This guarantee is in addition to your statutory
rights and is subject to the following conditions :
Mira Showers Website
(www.mirashowers.co.uk)
Visit our website to register your guarantee,
download user guides, diagnose faults, purchase
our full range of accessories and popular spares, or
request a service visit.
● The guarantee applies solely to the original
installation under normal use and to the original
purchaser only. The product must be installed and
maintained in accordance with the instructions
given in this guide.
● Servicing must only be undertaken by us or our
appointed representative.
Note! If a service visit is required the product must
be fully installed and connected to services.
● Repair under this guarantee does not extend
the original expiry date. The guarantee on any
replacement parts or product ends at the original
expiry date.
● For shower fittings or consumable items we
reserve the right to supply replacement parts only.
The guarantee does not cover:
Spares and Accessories
We hold the largest stocks of genuine Mira
spares and accessories.Contact us for a
price or visit our website to purchase items from our
accessory range and popular spares. (Only available
in the United Kingdom )
Service/Repairs
No one knows our products better than our
nationwide team of Service Technicians. We
can carry out service or repair work to your product
both during and after the guarantee period. (Only
available in the United Kingdom and Republic of
Ireland) Ask about our fixed price service repairs.
To Contact Us: UK
● Call out charges for non product faults (such as
damage or performance issues arising from
incorrect installation, improper use, inappropriate
cleaning, lack of maintenance, build up of
limescale, frost damage, chemical attack,
corrosion, system debris or blocked filters) or
where no fault has been found with the product.
● Water or electrical supply, waste and isolation
issues.
● Compensation for loss of use of the product or
consequential or indirect loss of any kind.
● Damage or defects caused if the product is
repaired or modified by persons not authorised by
us or our appointed representative.
● Routine maintenance or replacement parts to
repaired or modified by persons not authorised by
comply with the requirements of the TMV2 or
repaired or modified by persons not authorised by
TMV3 healthcare schemes
● Accidental or wilful damage.
● Products purchased ex-showroom display.
0844 571 50003
Calls cost 7p per minute plus your phone company’s
access charge
Fax: 01242 282595
Email – Visit
www.mirashowers.co.uk/contactus
By Post: Mira Customer Services Dept, Cromwell
Road, Cheltenham, Gloucestershire GL52 5EP
To Contact Us: Eire Only
01 531 9337
E-mail:
CustomerServiceEire@mirashowers.com
Mira is a registered trade mark of
Kohler Mira Limited.
The company reserves the right to alter
product specifications without notice.
14648
1088849-W2-F (B85N)
32
© Kohler Mira Limited, February 2016
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