Mira event Owner's manual

1
THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER
ALL-IN-ONE
Maintenance Guide
Installation, Operation &
POWER SHOWER
MANUAL

2
Contents
Section
Page
1.....Introduction....................................................................... 4
2.....Important Safety Information .......................................... 5
3.....Pack Contents Checklist.................................................. 7
4.....Specifications ................................................................... 8
5.....Installation Requirements:
General .................................................................... 10
Electrical................................................................... 10
Plumbing .................................................................. 11
Schematic Installation Diagrams .............................. 13
Before You Start ...................................................... 14
Change the Inlet Supply Ports ................................. 15
6.....Installation:
Mira Event................................................................ 16
Shower Fittings......................................................... 21
7.....Commissioning:
Priming the Appliance .............................................. 22
Adjustable Maximum Temperature Setting .............. 23
8.....Operation ........................................................................ 25
9.....Fault Diagnosis:
Fault Diagnosis - User Maintenance ........................ 26
Fault Diagnosis - Installer Maintenance.................... 28
10 ...Maintenance:
General..................................................................... 31
Cleaning.................................................................... 31

3
Inlet Filters, Cleaning or 'O' Seals Renewal.............. 31
Inlet Manifold, Check Valve or 'O' Seals Renewal.... 32
Push-fit Collet or 'O' Seals Renewal ......................... 35
Mixer Assembly Renewal.......................................... 36
Pump Assembly Renewal ......................................... 38
Flow Control Seal Renewal....................................... 40
PCBRenewal............................................................ 41
Micro-switches.......................................................... 44
Smaller Microswitches .............................................. 45
Appendices
1.....Wiring Diagram............................................................... 46
2.....Dimensions ..................................................................... 47
3.....Spare Parts:
Spare Parts List...................................................... 49
Spare Parts Diagram.............................................. 50
4.....Optional Accessories..................................................... 51
5.....Guarantee, Customer Care Policy, and How to contact
us
Back cover

4
If you experience any difficulty with the installation or operation of your new Mira
Event, then please refer to the back cover of this guide for Kohler Mira contact
telephone and fax numbers.
Introduction
Section
1
Thank you for purchasing a quality Mira product. To enjoy the full potential of
your new shower, please take time to read this guide thoroughly, having done
so, keep it handy for future reference.
The Mira Event is a dual speed all-in-one power shower with an integral mains
voltage pump unit, with separate controls for flow and temperature. The Event
features outlet flow control and a 15mm dual entry push-fit inlet manifold to
enable the appliance to support various inlet supply configurations. The manifold
incorporates inlet filters and check valves.
Designed to be surface mounted the Event is supplied complete with an
adjustable spray handset with three different spray actions (start, champagne,
massage) and an economy setting, flexible hose, adjustable clamp bracket
assembly, slide bar and supports, soap dish and hose retaining ring. The Event
is available with the shower fittings in white/chrome finish or all white finish.
The Event is not suitable for installation in institutional/commercial applications
or for use with mains water pressure applications, e.g. Instantaneous electric
heaters, instantaneous gas water heaters, unvented mains pressure systems,
pumped shower systems and some combination type storage systems.

5
1.1. Read all of these instructions.
1.2. Retain this guide for later use.
1.3. Pass on this guide in the event of change of ownership of the installation
site.
1.4. Follow all warnings, cautions and instructions contained in this guide.
1.5. Follow all warnings, cautions and instructions contained on or inside the
appliance.
1.6. The electrical installation must comply with BS 7671 “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. The installation should be carried out by
an electrician or contractor who is registered, or is a member of, an
association such as:
1.6.1. National Inspection Council for Electrical Installation and Contracting
(NICEIC), throughout the UK, Tel: [phone].
1.6.2. The Electrical Contractors Association (ECA), England and Wales,
Tel: [phone].
1.6.3. The Electrical Contractors Association of Scotland (ECAS),
Tel: [phone].
1.7. The plumbing installation must comply with Water Supply Bye-laws,
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:
1.7.1. Institute of Plumbing (IOP), throughout the UK, Tel: [phone].
1.7.2. National Association of Plumbing, Heating and Mechanical Services
Contractors (NAPH & MSC), England and Wales, Tel: [phone].
1.7.3. Scottish and Northern Ireland Plumbing Employers’ Federation
(SNIPEF), Scotland and Northern Ireland, Tel: [phone].
1.8. 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.
1.9. When this appliance has reached the end of it’s serviceable life, it should
be disposed of in a safe manner, in accordance with current local
authority recycling, or waste disposal policy.
1
Section Important Safety Information
2
1. Caution!

6
2. Warning!
2.1. 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.
2.2. THIS APPLIANCE MUST BE EARTHED.
2.3. In accordance with ‘The Plugs and Sockets etc. (Safety) Regulations
1994’, this appliance is intended to be permanently connected to the fixed
electrical wiring of the mains system.
2.4. DO NOT connect this appliance to a mains-fed water supply. Such a
connection will damage the appliance, and is not covered under the
manufacturer’s guarantee.
2.5. Make sure that any pipework that could become frozen is properly
insulated (Bye-law 49).
2.6. DO NOT operate this appliance if it is frozen. Allow the appliance to thaw.
If water is emitted from either of the pressure relief valves, maintenance
will be required before the appliance can be safely used.
2.7. DO NOT allow the appliance to be run dry.
2.8. DO NOT fit any form of outlet flow control as the outlet acts as a vent for
the heater tank. Only Mira recommended outlet fittings should be used.
2.9. If any of the following conditions occur, isolate the electricity and water
supplies and refer to “How to contact us”, on the back page of this
guide.
2.9.1. If the cover is not correctly fitted and water has entered the
appliance’s case.
2.9.2. If the case is damaged.
2.9.3. If the appliance begins to make an odd noise, smell or smoke.
2.9.4. If the appliance shows signs of a distinct change in performance,
indicating a need for maintenance.
2.9.5. If the appliance is frozen.
2.10. Isolate the electrical and water supply before removing the cover.
2.11. Mains connections are exposed when the cover is removed.
2.12. Moving parts are exposed when the cover is removed.
2.13. Ensure all electrical connections are tight, to prevent overheating.
2.14. Before proceeding with any electrical work on this unit, ensure that the
capacitors on the printed circuit board are fully discharged by turning the
flow control knob 'on' and 'off' again after the unit has been isolated from
the power supply.

7
2. Documentation
1 x Installation, Operation and Maintenance Guide 
1 x Customer Support Brochure 
Refer to the separate guide book for the shower fittings "Pack Contents
Checklist".


 Tick the appropriate boxes to familiarize yourself with the part names and to
confirm that the parts are included.

3 x Wall Plugs 
3 x Fixing Screws 
1 x Event All-in-One Power Shower 
1.Mira Event
1 x Push-Fit Release Tool 
Section
3Pack Contents Checklist

8
1.1. Continuous duty cycle - 15 minutes on, 60 minutes off.
1.2. The motor is fitted with self-resetting thermal trip protection, designed to
operate if the duty cycle is exceeded or ambient temperatures become
too high.
1.3. Ambient temperature - Maximum recommended ambient temperature
for the appliance is 30°C.
1.4. Hot Water Temperature - Maximum temperature 80°C.
BS 6700 recommends that the temperature of stored water should never
exceed 65°C. A stored water temperature of 60°C is considered sufficient
to meet all normal requirements and will minimise the deposition of scale
in hard water areas.
1.5. Maximum static inlet pressures - 1 bar or 10m (supplies must be
gravity-fed at nominally equal pressures). Refer to “Installation
Requirements – Plumbing; Note 3.18” for futher advice.
1.6. Minimum static inlet pressure - 0.0075 bar or 75mm (required to prime
the integral centrifugal pump).
1.7. Maximum recommended inlet pressure - 0.5 bar or 5m (supplies must
be gravity-fed at nominally equal pressures).
1.8. Noise - The powerful pump motor is fitted on rubber isolation mounts to
reduce the transmitted sound levels. The type of wall surface will affect
the perceived sound levels. Solid walls will provide a quieter operation.
2. Plumbing
2.1. Inlet - 15mm Push-fit inlet manifold
2.2. Outlet -1/2″BSP to BS2779.
3. Electrical
3.1. Appliance power supply - 230/240 V, 50Hz, fused at 3 Amps, via a
double pole switched fused connection unit (not supplied) with a minimum
3mm contact separation in each pole.
3.2. Power supply connection - The Event is fitted with a terminal block and
earth stud which will accept cable up to 2.5mm².
3.3. Absorbed power - Approximately 150 Watts under normal working
conditions.
Section Specifications
4
1. General

9
4. Standards
4.1. All materials used in the manufacture of this appliance which are in
contact with water are “W.B.S. approved”.
4.2. Designed to comply with BS 3456.
4.3. B.E.A.B. approval applied for.
4.4. W.B.S. approved appliance. Certificate No: 9410018.
4.5. This appliance complies with the electromagnetic compatibility (EMC)
directive EN50082-1 (1992), EN55014 (1987), and EN60555-2/3 (1987).
Please see carton for CE approval label.

10
1. General
1.1. Do not take risks with plumbing or electrical equipment.
1.2 Do not install the appliance in a position where it could become frozen.
1.3 Isolate electrical and water supplies before proceeding with the
installation of the appliance.
1.4 The shower control must be fed from a cold water storage cistern and
hot water cylinder providing nominally equal pressures.
1.5 The installation must be carried out by a competent installer.
1.6 When installing into a cubicle, the appliance is best positioned to spray
across the opening of the cubicle rather than towards the opening.
1.7 The appliance must be fitted onto the finished wall surface i.e. on top of
the tiles. Do not fit the appliance to the wall and then tile up to the
sides of the casing. (Small pillars moulded on to the back of the case
allow water to drain from behind the appliance).
1.8 When fitting the appliance with back inlet supplies it is recommended
that the supply pipework is sealed to the wall to prevent water from
leaking back into the wall.
1.9 In solid wall installations the supply pipework should be installed within
ducting to allow some free lateral movement when making supply
connections and to ensure compliance with the requirements of Bye-
law 58 “Accessibility of pipes and pipe fittings”.
2. Electrical
2.1. Do not turn on the electrical supply until the plumbing has been
completed and the pump primed as the unit must not be operated
dry.
2.2 The mains supply must be 230/240V at 50Hz connected to the
appliance via a double pole switched 3 Amp fused connection unit (not
supplied) with a minimum 3mm contact separation gap in each pole.
2.3 Fuses do not give personal protection against electric shock.
2.4 We recommend the inclusion of a 30mA residual current device (RCD).
This may be part of the consumer unit or a separate unit.
Section
5Installation Requirements

11
3.1. Do not use excessive force when making connections to the flexible
hoses or handset, finger tightness is sufficient.
3.2 Do not turn on the electrical supply until the plumbing connections have
been completed and the pump primed as the unit must not be operated
dry.
3.3 Do not solder supply pipework within 300mm of the appliance as
transmitted heat may melt the inlet manifold.
3.4 When installed, the top of the appliance must be at least 75mm lower
than the base of the cold water storage cistern to prevent the pump being
run dry.
3.5 Avoid layouts where the hose will be sharply kinked. This may reduce the
life of the hose.
3.6 The storage cistern should have a minimum storage capacity of 230 litres
to provide adequate showering time and to comply with BS6700 (1987).
Insufficient storage may result in the pump being run dry.
3.7 The action of a pump is to increase the flow rate. If the supply pipework
cannot handle the higher flow rate then:-
3.7.1 The expected flow rate may not be achieved.
3.7.2 Air may be drawn into the hot supply from the vent pipe, causing
spluttering and temperature fluctuations at the handset.
3.8 To prevent such operational difficulties the feed from the cylinder should
be as illustrated. Side entry cylinder bosses are not recommended
because:-
3.8.1 A drop in cylinder water level could expose a top entry immersion
element if fitted.
3.8.2 Air-in-water solution gathers at the edge of the cylinder and in the
centre, during the heating process before travelling up the vent.
3.9 A high level hot feed pipe run as illustrated will result in air locking and
should be avoided.
3.10 No form of flow control should be fitted to the outlet of the appliance.
3.11 Conveniently situated isolating valves should be fitted for servicing
purposes (Bye-law 68).
3.13 The use of white polyethylene plastic pipe suitable for hot water is
recommended to enhance the appearance of the finished installation,
when using surface mounted inlet supply pipework. Internal pipe supports
(not supplied) should be used with this type of pipe.
3.14 Use only the supplied Mira handset with this appliance.
3. Plumbing

12
3.15 If the appliance is installed on a common supply which feeds an
adjacent
tap, the maximum static inlet pressure for the appliance will, under
certain circumstances be exceeded; the action of closing the tap can
cause a pulse in the supply pressure which will result in damage to the
appliance. This can be resolved by the installation of a suitably sized
mini expansion vessel, sited as close as possible to the tap and
pressurised to 0.5 bar.
3.16 Do not fit the appliance to the wall and tile up to the case. The
appliance 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).
Warning!
This product does not incorporate any form of thermostatic control. If
there is a cold water supply failure, hot water at a similar temperature
to the hot tap will be available at the shower fitting.
To prevent excessive showering temperatures it is important that the
procedure contained in the section “Commissioning: Adjustable
Maximum Temperature Setting” is followed.

13
4. SchematicInstallationDiagrams
Schematic Installation - Correct
25mm
minimum Warningpipe
Cistern
Minimum
1.0mhead
Minimum
Ø22mm
Isolatingvalve Other hot draw offs
Hotsupply
D.H.W.
60oC
Vent
pipe
Minimum
75mmhead
Hose
retaining
ring
CylinderFeed
ColdPumpFeed
Warning
pipe
A
B
A
BVent
90o
30o
60o
Schematic Installation - Incorrect
Isolatingvalves
missing
Othercold
draw offs
Cold
supply
Hot
supply
D.H.W.
60oC
Vent
pipe
Cistern
Avoidhigh-level
hotfeed pipe runs
(may cause air locking)
Hoseretaining
ringmissing
(see Water Byelaws)
Strainedhose
*
*
*
*
Other hot draw offs
Side
entry
boss
This layout is not suitable
for the Mira Event
* Incorrect supply
connections

14
5. Before You Start
The Mira Event features a 15mm dual entry push-fit inlet manifold to enable the
appliance to support three inlet supply configurations. Choose the appropriate
inlet supply configuration to suit your installation before proceeding to install the
appliance.
The inlet manifold is factory fitted with inlet two blanking plugs fitted to the top
inlets and allows for a bottom inlet supply configuration. The blanking plugs can
be repositioned to suit the installation's supply pipework configuration. A push-fit
release tool is provided which can be used to lever out the blanking plugs. Refer
to “Change the Inlet Supply Ports” for the complete procedure.
The Event will accept three dual inlet supply configurations:-
Top inlet supply – Seal off bottom inlets of manifold.
Bottom inlet supply – Seal off top inlets of manifold.
Back inlet supply – Seal off bottom inlets of manifold.
To enhance the final appearance of the appliance the Mira Event case features
two removable inlet blanking plates which are factory fitted in to the top and
bottom of the case.
These blanks can be removed as follows to allow the three inlet supply
configurations:-
Top inlet supply – Remove top inlet blanking plate.
Bottom inlet supply – Remove bottom inlet blanking plate.
Back inlet supply – Removal of top or bottom inlet blanking plates not
required.
The Mira Event case also
caters for top, bottom or back
electrical supply cable entry.
In the case of top or bottom
entry this is achieved by
cutting away and trimming
thinned sections in the top
and bottom of the case. The
cable can then be fitted into a
moulded channel running up
and down the back of the
case.
Topinletsupply
Bottominletsupply
Back
inlet
supply
Mouldedchannel
forelectrical
supplycable
Inletblankingplate

15
6. ChangetheInletSupplyPorts
6.1. This procedure changes the
blanking plug positions to
allow for a top or back inlet
supply configuration.
6.5. Insert the push-fit release
tool between the flange of
each of the blanking plugs
and the grey collet of the inlet
manifold, and lever the plugs
outward.
Whilst holding back on the
collet, pull out each
appropriate blanking plug by
hand.
Install the two blanking plugs
in the manifold bottom inlets.
6.4. Remove the inlet blanking
plate as appropriate.
6.3. Unscrew the cover retaining
screw and remove the cover
by pulling the bottom of the
cover in an outward and
upward direction
6.2. Use the push-fit release tool
(supplied) to lever off the flow
knob, indicator trim and
temperature knob.
Note! Use of a screwdriver
will damage the knobs and
the cover assembly.
Flowknob
Blanking
plugs
Temperature
knob
Release
tool
Cover
retaining
screw
Indicator
trim
Inlet
manifold

16
1.1. Ensure that you have read the
section entitled “Before You
Start” to select the
appropriate inlet supply
configuration to suit your
installation.
1.MiraEvent
The following installation instructions are based on a rising hot and cold water supply
enteringtheappliancefrombelow(bottominlet)and a falling concealed electrical
supply(viaminiature trunking) fromabove.Theprocedureshould beappliedto
alternativeinletsupplyor electrical supply configuration as appropriate.
UsingthesuppliedHose RetainingRingto
comply with ( Bye-Law 17).
1.2. The Mira Event should be
positioned so that it is at a
convenient height for all the
family. It should be
positioned so that it
discharges down the centre
line of the bath, or across the
opening of the cubicle, and
should be directed away from
the appliance.
1.3. Decide on a suitable location
for the appliance avoiding
buried cables and pipes.
Ensure that when the hose
retaining ring is placed on the
lowest position on the slide
bar, that the handset will not
fall below the minimum
clearance gap between the
bath or shower tray spillover
level of 25mm (Bye-law 17).
Spillover
level
25mm
minimum
6
Section Installation

17
1.4. Using a spirit level position
the appliance on the wall,
then mark through the three
fixing points.
1.6. Cut away and trim the
thinned section in the top of
the case to allow the
electrical supply cable to run
down the back of the case.
1.5. Drill and plug the wall.
Caution! Avoid buried
cables and pipes!
Important! This Mira Event
must be fixed to the wall at
all three fixing positions.
The fixing holes are
elongated to assist in vertical
and horizontal alignment.
Tip! Special consideration
should be given to the fixing
arrangements when installing
on to a dry lined, stud
partition or dry partition wall
structure. Installers may wish
to obtain alternative
proprietary cavity fixings, or
choose other options such as
fabricating rear supports
using wooden blocks,
however, these methods of
fixing are beyond the scope
of this guide.

18
1.7. Run the electrical supply
cable in surface mounted
miniature trunking (not
supplied).
Allow sufficient cable to
connect to the appliance
terminal block (approximately
275mm).
Strip back approximately
30mm of outer cable
insulation.
1.8. Hot and cold inlet supply
connections as marked are:-
Hot – Left Cold –
Right
Note! Reversed supply
connections cannot be
catered for with this
appliance.
Run the hot and cold water
supply pipes at 28mm
centres, ensuring that the
pipe ends project into the
appliance by 30mm to allow
connection into the inlet
manifold.
Miniature
trunking
30
275
28
30
Alldimensionsinmillimetres

19
1.9. Ensure that the end of the
supply pipework is cut
squarely and free from burrs,
which will damage the inlet
manifold seals.
Chamfer the end of the pipe to
assist insertion into the fitting
and prevent tearing the ‘O’
seal.
Note! PTFE tape or liquid
jointing is not required to
assist connection.
Do not use stainless steel
piping.
Note! If using chrome plated
copper pipework then all
traces of chrome plate will
need to be removed from the
connecting surfaces. If the
chrome is not completely
removed then the inlet
manifold collet will not grip the
supply pipe and under
pressure the pipes may be
forced out.
Thoroughly flush the
incoming hot and cold water
supply pipes (Bye-law 55).
Chamfer

20
1.10. Push the supply pipework
inside the inlet manifold
until resistance is felt.
DO NOT FORCE!
Warning!
Do not insert fingers into
the push-fit connectors as
this can result in injury.
1.13. Connect the conductors of
the electrical supply cable
to the terminal block.
Take the earth wire to the
earth stud adjacent to the
PCB terminal block. The
supply cable earth
connector should be
sleeved.
1.12. Screw the Mira Event to the
wall using either the
supplied wall screws or
alternative fixings
depending on the wall
structure.
Do not over tighten!
Ensure that the electrical
supply cable is correctly
seated in the channel in the
back of the case.
1.11. The collet and ‘O’ seal will
automatically make a
hydraulic seal.
Important!
This Mira Event must be
fixed to the wall at all three
fixing positions.
The fixing holes are
elongated to assist in
vertical and horizontal
alignment.