Kohler mira GO User manual

11079320-W2-G
Manual
These instructions are to be left with the user
POWER SHOWER
MANUAL
Installation and User Guide

21079320-W2-G
WARNING - This shower can deliver scalding temperatures, cause
re, electric shock or other personal injury if not operated, or
maintained in accordance with the instructions, warnings and
cautions contained in this guide and on the appliance.
Please read the important safety information and the operation section
of this guide before using the shower. Failure to follow the instructions
provided with this shower will invalidate the guarantee.
TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK OR INJURY:
1. Children younger than 3 years should not use this shower. Children
3 years to under 8 years should only use this shower under
continuous supervision. Children aged 8 years and above and
persons with reduced physical, sensory or mental capabilities or
lack of experience or knowledge can use the shower if they are
given supervision or instruction concerning use of the appliance
in a safe way and understand the hazards involved.
2. Children shall not be allowed to play with the shower.
3. Cleaning and user maintenance shall not be made by children
without supervision.
4. Theoutletmustnotbeconnectedtoanytaporttingotherthan
thosespecied.
5. The showerhead must be descaled regularly. Any blockage of the
showerhead or hose can cause damage to the shower.
6. Warning! DO NOT switch on if there is a possibility that the water
in the heater is frozen.
7. The shower must be provided with means for local disconnection
from the supply mains having a contact separation in all poles
that provide full disconnection under overvoltage category III,
the instructions state that means for disconnection must be
incorporatedinthexedwiringinaccordancewiththewiringrules.
8. Installation of the shower must be carried out in accordance with
these instructions by qualied, competent personnel. Read all
instructions before installing the shower.
IMPORTANT SAFETY INFORMATION

31079320-W2-G
9. DO NOT switch the shower on if water starts leaking from the shower
case. Isolate the electrical supply to the shower immediately.
10. DO NOT switch the shower on if the case appears to be damaged
or incorrectly tted. Isolate the electrical supply to the shower
immediately.
11. DO NOT increase the power setting or adjust the temperature
control rapidly while using the shower.
12. DO NOTswitchtheshowero󰀨andbackonwhilestandinginthe
waterow.
13. DO NOT change the handset model. Fit only shower heads
recommendedbyMiraanddonotanyadditionaldevicetorestrict
thewateroutletow.
14. When adjusting the handset mode, point handset away from body
and make sure that the water temperature has stabilised before
continuing to shower.
15. Use caution when altering the water temperature, always check
the temperature before continuing to shower.
16.Switchtheshowero󰀨attheelectricalisolatingswitchwhennotin
use. This is recommended with all electrical appliances.
17. Installation of the shower must be carried out in accordance with
these instructions by qualied, competent personnel. Read all
instructions before installing the shower.
18. Isolate the electrical and water supplies before commencing
installation. The electricity must be isolated at the consumer unit
and the appropriate circuit fuse removed, if applicable. Mains
connections are exposed when the cover is removed.
19. DO NOT install the shower in areas with high humidity and
temperature (i.e. Steam rooms and saunas).
20. DO NOT install the shower where it may be exposed to freezing
conditions. Ensure that any pipework that could become frozen is
properly insulated.
21. DO NOT connect the outlet of the shower to any tap, control valve,
triggeroperatedhandsetorshowerheadotherthanthosespecied
for use with this shower as the outlet acts as a vent for the tank
body. Only Kohler Mira recommended accessories should be used.

41079320-W2-G
22. DO NOTperformanyunspeciedmodications,ordrillorcutholes
in the product other than instructed by this guide. When servicing
only use genuine Kohler Mira replacement parts.
23. Always check the water temperature is safe before entering the
shower.
24. 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.
25. If the shower is dismantled during installation or servicing then,
upon completion, an inspection must be made to ensure all
electrical connections are tight and that there are no leaks.
26. This appliance is intended to be permanently connected to the
water mains and not connected by a hose set.
27. Maximum Inlet Static Pressure is 100 kPa (1.0 bar).
Minimum Inlet Static Pressure is 0.8 kPa (0.008 bar).
DISPOSAL AND RECYCLING
End of Product Life
Electrical and electronic devices contain a range of materials that can
be separated for recycling and used in new products.
This product should not be disposed of with your general
household waste. When this product has reached the end
of its serviceable life, please take it to a recognised WEEE
(Waste Electrical and Electronic Equipment) collection
facility such as your local civic amenity site for recycling.
Your local authority or retailer will be able to advise you of your nearest
recycling facility.

51079320-W2-G
The Mira GO Manual Power Shower is an all-in-one power shower with an integral
mainsvoltagepump,andseparatecontrolsforowandtemperature.Itfeaturesa
15mmdualentrypush-tmanifoldwhichsupportsvariousinletsupplycongurations.
Themanifoldincludesinletltersandcheckvalves.
Designed to be surface mounted, the Mira GO Manual Power Shower comes complete
withanadjustablesprayhandsetwiththreesettings,exiblehose,adjustableslider,
sliding rail, soap tray and bracket.
Guarantee
For domestic installations, Mira Showers guarantee the Mira GO Manual Power
Shower against any defect in materials or workmanship for a period of one year
fromthedateofpurchase(showerttingsforoneyear).
For terms and conditions refer to the back cover of this guide.
Patents
Patents GB: 2 340 210
INTRODUCTION
Application Power Shower Power Shower with
Fittings
Domestic  
Light Commercial  
Heavy Commercial  
Ifyouexperienceanydi󰀩cultywiththeinstallationoroperationofyournewPower
Shower, please refer to ‘Fault Diagnosis’, before contacting Kohler Mira Ltd.
Our contact details can be found on the back cover of this guide.

61079320-W2-G
PACK CONTENTS
Tick the appropriate boxes to familiarise yourself with the part names and to
conrmthatthepartsareincluded.

1 x Manual Power Shower
4 x Case Inserts
1 x Flow Control Knob
1 x Temperature Control Knob
1 x Temperature Indicator Trim
1 x Push-Fit Release Tool
3 x Rubber Wall Plugs
3 x Rubber Feet
3 x Fixing Screws
1 x Installation and User Guide
1 x Guarantee Registration Document

71079320-W2-G
DIMENSIONS
All dimensions are nominal and in millimetres.
28
28
20
20
130
88
66 80
310
210

81079320-W2-G
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-t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65°Cor less.Such temperaturesare consideredsu󰀩cienttomeetallnormal
requirements and will minimise the deposition of scale in hard water areas.
Operating Pressure
Minimum maintained pressure: 1.0 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 GO Manual Power Shower pump is now continuously rated.
Themotoristted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xed
towillalsoa󰀨ecttheperceivednoiselevel,solidwallswillprovideaquieteroperation.
Maximum total head delivered – 1.5m
Approvals
The Mira GO Manual Power Shower complies with UKCA & CE standards.
SPECIFICATIONS

91079320-W2-G
Gravity Fed System - The shower MUST be fed from a cold water cistern and hot
water cylinder providing nominally equal pressure.
INSTALLATION REQUIREMENTS
25
mm Min
Cistern
30° - 60°
90°
Service Valve
10 m Maximum
80 mm Minimum
1.5 m Max.
Head
Vent
Pipe
Hose Retaining
Ring
Other Hot Draw Offs
Hot
Cold
Hot Water
Tank
60°C
1 m Head
Minimum
Minimum
Ø 22 mm

101079320-W2-G
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 multi-point/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ttingandremovalofthecover).Thepositionof
theapplianceandtheshowerttingsmustprovideaminimumgapof25mm
between the spillover level of the shower tray/bath and the handset, to prevent
backsiphonage.
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.
9. 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.
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 mm2if 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tted.Thismaybepartofthe
consumer unit or a separate unit.
6. Fuses do not give personal protection against electric shock.

11 1079320-W2-G
Plumbing
1. A minimum storage capacity of cold water of 230 litres (50 gallons) is required
toprovideadequateshoweringtime.Insu󰀩cient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e󰀨ectsontheshowerperformanceofother
draw-o󰀨sareminimised. Makesuretheshowerunitistherstdraw-o󰀨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ngersintothepushtconnections.
7. The supply pipe ends must be free from burrs, as these will damage the push
t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ushedtoremoveanydebrisbeforeconnecting
the shower unit.
12. Fit non-restrictive (free-owing) isolating valves in the inlet pipework to the
appliance. Make sure isolating valves can be accessed easily.

121079320-W2-G
Warning! Do not x 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tting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
that 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.
25 mm Minimum
Spillover level
Hose Retaining Ring
All dimensions in millimetres
Miniature Trunking
275
28
30
30
H C

13 1079320-W2-G
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ttingandprevent
the ‘O’ seal tearing.
Warning! Do notinsertngersinto
thepush-t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.
4. Run the electrical supply cable in
surface mounted miniature trunking
(notsupplied).Allowsu󰀩cient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ange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.
Chamfer
Trim the thinned section of
the case covering the cable
channel.
Push-t
Release Tool
Blanking Plug
Inlet Manifold
Collet
Securing
Screws
Securing Screw

141079320-W2-G
7. Temporarily locate the shower unit.
8. Position the shower unit on the wall
andmarkthethreexingpoints.
Note! Installers may wish to obtain
alternativeproprietarycavityxings
for dry lined, stud partition or dry
partition wall structures.
9. Usethepush-t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xing
points before drilling.
10. Drill 9.5mm holes and t 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.
Fixing Points

15 1079320-W2-G
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
ttedtostopwateringressintothe
inside of the unit.
13. Fit the blanking plates to the unit
case in the following manner.
For Top Inlet Pipework
For Rear Inlet Pipework
For Bottom Inlet Pipework
Rubber Feet
Fit the full blanking
plates to the top
and bottom of the
case.
Fit the full blanking
plate to the bottom
of the case.
Fit the half
blanking plate
to the top of the
case.
Fit the half
blanking plate to
the bottom of the
case.
Fit the full blanking
plate to the top of
the case.

161079320-W2-G
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
xing points. The xing 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xings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ow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 1079320-W2-G
19. Rettheunitcoverandsecurewith
the three cover securing screws.
20. Insert the ow control knob in the
OFF position.
21. Insert the temperature indicator trim
and the inner temperature control
knob.
22. The power shower will now
require commissioning, refer to
COMMISSIONING.
23. Installtheshowerttings,refertothe
instruction manual supplied with the
ttings.
Inner
Temperature
Control Knob
Temperature
Indicator Trim
OFF Position
Flow Control
Knob
Arrow/OFF
Position

181079320-W2-G
COMMISSIONING
The unit must not be run dry. Before proceeding any further with the installation the
shower unit must be commissioned.
1. Connecttheexiblehosetotheoutlet
of the shower unit.
Caution! Do not over tighten.
2. Turn on the water supplies and check
for leaks.
3. Switch on the electrical supply.
4. Turn the outer flow control
anticlockwisetofullow.
5. Rotate the inner temperature control
anticlockwise to check the hot supply
and clockwise to check the cold
supply.
6. Turntheowcontrolclockwise to the
OFF position.
7. The shower unit is now
commissioned.
Inner
Temperature
Control
Temperature Indicator
CoolerWarmer
Outer Flow Control
Maximum
Flow Position
Outer Flow Control
O󰀨Position
Hose Washer
Hose

19 1079320-W2-G
OPERATION
1. Turntheouterowcontrolknobuntilthe
desiredowofwaterisobtained.The
ow of water will increase the further
the control is turned anticlockwise.
2. Turn the inner temperature control knob
anticlockwise for warmer water and
clockwise for cooler water.
3. Turn the outer ow control knob fully
clockwisetostoptheowofwater.
Warning! The shower is a manual mixing shower which can select water
temperatures from FULL HOT to FULL COLD. If the temperature control knob is
turned anticlockwise fully the shower will deliver water at the same temperature as
the stored hot water temperature (this will be the same temperature as the hot tap
water temperature).
Note! The shower is a manual mixing shower. The showering temperature will
change if the incoming water temperature changes. Therefore incoming water
supply temperatures must remain constant if a stable showering temperature is to
be achieved.
Inner
Temperature
Control Knob
CoolerWarmer
Outer Flow Control
Outer Flow Control
O󰀨Position

201079320-W2-G
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,di󰀩culties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 nding before contacting the
person responsible for installing your shower.
Malfunction Cause Remedy
The shower
temperature is
too cold.
The hot water cylinder
temperature is less than
12 °C above the shower
temperature.
Adjust the cylinder
temperature. Note! It is
recommended that stored
water temperatures does not
exceed 65 °C.
The blend
temperature is
unstable.
The spray plate is blocked.
Theinletltersareblocked.
The isolating valve is
partially closed.
Faulty plumbing system.
Clean the spray plate. Refer
to the instruction manual
supplied with the shower
ttings.
Contact your installer.
Open the isolating valve.
Contact your installer.
The pump does
not operate.
Electrical supply failure.
PCB failure.
Potentiometer failure.
The motor overheated and
the thermal switch operated.
Contact your installer.
Contact your installer.
Contact your installer.
If the thermal switch operates
repeatedly, contact customer
service for further advice.
Low or no water
ow.
Isolating valves are closed.
Inletltersblocked.
Check the isolating valves
arettedincorrectly.
The appliance is sited above
cold water storage cistern.
Faulty plumbing system
(airlock).
Open the isolating valves.
Contact your installer.
Contact your installer.
The appliance is not
suitable for negative head
installations.
Refer to INSTALLATION
REQUIREMENTS.
Contact your installer.