Mira Mode User manual

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Maintenance Guide
Operation &B
Installation
SHOWER CONTROL
THESE INSTRUCTIONS ARE TO BE LEFT WITH THE USER

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INDEX
Page
INTRODUCTION 3
DESCRIPTION 3
SAFETY WARNINGS 4
PACKCONTENTS 5
DIMENSIONS 7
SPECIFICATION 9
INSTALLATIONREQUIREMENTS 11
INSTALLATION 15
COMMISSIONING 29
OPERATION 30
FAULTDIAGNOSIS 31
MAINTENANCE 32
SPARE PARTS 34
CUSTOMERCARE BackCover

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INTRODUCTION
MiraModeThermostaticmixingvalvesarespecifiedtomeetthehigheststandardsof
safety,comfortandeconomyasdemandedbytodaysusers. AllMiraModeproducts
aredesigned,manufacturedandsupportedinaccordancewithaccreditedBSENISO
9001:1994 Quality Systems.
This Manual covers all Mira Mode Thermostatic Mixing Valves manufactured from
August2000.
DESCRIPTION
TheMiraModethermostaticshowervalveprovidesaccuratetemperaturecontrol
and flow rates.
The Mira Mode is available in the following options;
MiraMode-SurfaceMounted
Anexposedshowercontrolfor connection to rear top and bottom entry pipework.
Refer to Specification for details on the pressure ranges.
MiraMode-Recessed
Abuilt-inshowercontrolforconnectionto concealed pipework. Refer to
Specification for details on the pressure ranges.
ThankyouforpurchasingaqualityMiraproduct.Toenjoythefullpotentialofyournew
product,pleasetaketimetoreadthisguidethoroughly,havingdoneso,keepithandy
forfuturereference.
Ifyouexperienceanydifficultywiththeinstallationoroperationofyournew
shower control, then please refer to the Fault Diagnosis section, before
contactingKohlerPlumbingSolutions.Ourtelephoneandfaxnumberscan
be found on the back cover of this guide.

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SAFETY: WARNINGS
Miraproductsare precision-engineered and should give continuedsuperiorandsafe
performance,provided:
1. Theyareinstalled,commissioned,operatedandmaintainedinaccordancewith
therecommendationsgiveninthisManual.
2. Periodicattentionisgiven,asnecessary,tomaintaintheproductingoodfunctional
order.
The function of a thermostatic mixing valve is to deliver water consistently at a
safetemperature.
Provided it is installed, commissioned, operated and maintained within these
recommendations, the risk of failure, if not eliminated, is reduced to the minimum
achievable.
Anyone who may have difficulty understanding or operating the controls of any
showershould be attended whilstshowering.Particularconsiderationshould be
given to the young, the elderly, the infirm, or anyone inexperienced in the correct
operationofthecontrols.

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PACKCONTENTS
!Ticktheappropriateboxestofamiliarizeyourselfwiththepartnamesandtoconfirm
that the parts are included.
"
Documentation
1 x Installation, Operation and Maintenance Guide !
1 x Customer Support Brochure !
1 x Riser Arm !
5 x Wall Plugs !
1 x Valve !
5 x Fixing Screws !
2 x Flow Regulators !
1 x Shower Rose !
1 x Support Brackets !
1 x Hexagonal Wrench !
MiraMode
(‘O’Seal Fitted)

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!Ticktheappropriateboxestofamiliarizeyourselfwiththepartnamesandtoconfirm
that the parts are included.
"
Documentation
1 x Installation, Operation and Maintenance Guide !
1 x Customer Support Brochure !
Mira Mode B
5 x Wall Plugs !
1 x Valve !
5 x Fixing Screws !
1 x Shower Rose !
1 x Building-in Shroud !
1 x Shower Arm Assembly !
(‘O’Seal Fitted)
2 x Panel Screws !
1 x Hexagonal Wrench !
2 x Flow Regulators !

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All dimensions are nominal and in mm
DIMENSIONS
540 mm
886 mm
110 mm
1115 mm
MiraMode
90 mm max.

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All dimensions are nominal and in mm
Mira Mode B
477 mm
157 mm
155 mm Dia
152 mm

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SPECIFICATION
Important Points:
1. Theinstallation, commissioningandmaintenanceof thisproductmustbe carried
outinaccordancewithinstructions given in this Manual, and must be conducted
bydesignated,qualified and competent personnel.
2. 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:
3. Miraproductsareprecision-engineeredand should give continued superior and
safeperformance, provided:-
- theyareinstalled, commissioned,operatedandmaintainedinaccordance with
theserecommendations and
- periodicattentionisgivenasnecessarytomaintaintheproductingoodfunctional
order. RecommendedguidelinesaregivenintheMAINTENANCE.
4. Warning: continued use of this product in conditions outside the limits listed in
thissection can severelyaffecttheperformance and reducetheeffectiveservice
life, and can present potential risk to users.
5. Suitable for use with most modulating Instantaneous GasWater Heaters.
For information on other specific applications or suitability, refer to Kohler Mira
Ltd., or Local Agent.
-Institute of Plumbing (IOP), throughout the UK.
-National Association of Plumbing, Heating and Mechanical Services
Contractors(NAPH & MSC),Englandand Wales.
-ScottishandNorthernIrelandPlumbingEmployers’Federation(SNIPEF),
ScotlandandNorthernIreland.

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Operating Parameters: Pressures And Flow Rates
Temperature Control
Maximumhotwatertemperature: 85°C(BS 6700 recommends thatthetemperature
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
depositionof scale in hard waterareas).
Optimumtemperature control range:35 - 45°C
Minimumtemperature differential betweenhotandoutlet temperature: 10°C
Foroptimumperformance,maintained supply pressures should be nominally
equal.
MaximumPressureLossRatio:5:1
Minimum Maintained Pressure (gravity system):0.1 bar.
(0.1 bar = 1 metre from base of cold tank to outlet of shower fitting)
MaximumMaintainedPressure:6.0 bar
MinimumMaintained Pressure (gaswaterheater):1.0 bar.
Maximum Static Pressure:10 bar.
Flow Rates
Pressures

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Theperformancespecificationoutlinedbelowisachieved with outlet blend
temperatureset between 35 - 45°C andsupplies of 15°C cold and 65°Chot with
nominallyequalpressures.
Key to Symbols
Isolating valve
Mixing Valve
Twin Impeller Pump
Tempering Valve
Pressure Reducing Valve
Single Impeller Pump
Overflow Indicator
Mini Expansion Vessel
INSTALLATIONREQUIREMENTS
- Outletblendtemperatureismaintainedwithin2°Cwitha
10°C change in hot or cold supply.
- Thermostatic shut down to seepage within 2 seconds if cold supply
fails.This is achieved only if the hot supply temperature is 10°C above
thesetoutletblendtemperature.
Inlet connectors are 15 mm compression
Outlet connector is 15 mm compression
Hot (H) and Cold (C) inlets are clearly marked and must be connected this way.
Plumbing Connections

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Gas Heated System -The shower MUST be installed with a gas water heater or
combinationboiler of a fully modulating design.
A fully modulating boiler is one where the draw off rate is indirectly controlling the
gas flow to the boiler, producing a relatively constant hot water temperature.
Gravity Fed System -The shower MUST be fed from a cold water cistern and hot
watercylinderproviding nominally equal pressure.

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Unvented Mains Pressure System -The showercan be installed with a unvented,
stored hot water cylinder.Only“a competent person”as defined by the Building
Regulations may fit this type of system.
Mains Pressurised Instantaneous Hot Water System -The shower installedwith
systems of this type is supplied hot water via a tempering valve, this provides
relativelyconstanthotwaterand the shower will compensate for temperature
changes should they occur.

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Pumped System -The shower can be installed with an inlet pump (twin impeller).
The pump must be installed on the floor next to the hot water cylinder.Ensure hot
cylindervent pipe is arranged as shown to enable air separation.
90°
30°-60°
AirSeparation

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INSTALLATION
General
Installation must be carried out in accordance with these instructions, and must be
conductedbydesignated,qualified and competent personnel.
1. Before commencing, ensure that the installation conditions comply with the
informationgiveninSPECIFICATION.
2. Care must be taken during installation to prevent any risk of injury or damage.
3. The mixing valve should be positioned for easy access during use and
maintenance. All routine maintenance procedures can be conducted with the
mixing valve body in place.
4. Convenientlysituatedisolating valvesmust beprovidedformaintenance.
5. Pipework must be rigidly supported.
6. Pipework dead-legs should be kept to a minimum.
7. Supplypipeworklayoutshouldbearrangedtominimise the effect of other outlet
usage upon the dynamic pressures at the mixing valve inlets.
8. To eliminate pipe debris it is essential that supply pipes are thoroughly
flushed through before connection to the mixing valve.

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Fitting Regulator
1. Removecompressionnut and
olive from inlet elbow or
connector.
2. Ensure‘o’ seal is fitted to flow
regulatorandpushinside until
flange locates up against
internalshoulderofinletelbow/
connector.
3. Make compression fitting using
compression nut and olive.
Two grey flow regulators are supplied with the product.They fit into the cold and/or
hot inlet connectors for high pressure systems.
The selection table indicates when and where these can be fitted.
Regulators
Inlet Tube
Compression Nut
Olive
Inlet Elbow/Connector
Incorrect Fitting
‘O’ Seal
Flow Regulator
Optional

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MiraMode
BackInletSupplies(risingorfallingconcealedpipework)
1. Decide on a suitable position for the
product ensuring that the mixer and
theshowerheadisataheightsuitable
for all users to operate (Note! longer
riserarms are NOT available).
2. Removebackplate from rearofmixer
bylooseninggrubscrewwithhexagon
key (supplied) on the underside of
mixer.
3. Use the backplate to mark 4 hole
positions.Drill the wall and insert the
wall plugs (4 off, supplied). For other
types of wall structure alternative
fixings may be required.
Fitthebackplatetothe wall using the
fixing screws. Ensure TOP on
backplate is positioned correctly.
Backplate
Fixing Screws
Wall Plugs
4. Use a spirit level and pencil to mark
the route of the hot and cold water
supply pipes at 110 mm centres.

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5. Removetheplasterandbrick/blocktothe
requireddepth to conceal thepipework.
Note!Depthmustbesufficienttoprevent
pipe concealing plates fouling on the
plumbingelbows.
6. Install the supply pipes.The pipes must
be at 110 mm centres and project the
followingdistancesfromthe finishedwall
surface:
18mm ifflow regulators arebeingfitted.
21 mm if no flow regulators are fitted.
7. Finishthesurfaceof thewallasrequired.
8. Slide the pipe concealing plates with‘O’
seals fitted, nuts and olives over the hot
and cold supply pipes.
9. Thoroughly flush the hot and cold
watersupplypipes.The supplies must
be clean and free from debris before
connectingtheshowercontrol.Failure
to do so may result in product
malfunction.
Dimension from
finished wall
surface
110 mm
Centres
Concealing Plate
Nut
Olive

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10. Locate the shower control on to the
supply pipes and hold it in position.
11. Use a suitable spanner to tighten the
nuts and pull the shower control onto
the backplate. Protect the chromium
plated surfaces with a cloth. Use the
2.5 mm A/F hexagon wrench
(supplied)totightenthetwogrubscrew
in the backplate. The grub screw will
hold the shower control in position.
12. Withtheshowercontrolturnedoff.Turn
on the water supplies and check for
any leaks.
Shower Control
2.5 mm A/F
Hexagon Wrench
ReversingOutlet
To reverse outlet connector follow
instructions below.
1. Using a suitable tool, flick the plug
cap from the centre of sealing plug
to reveal keyway.
2. Insert a 1/2”hexagon key (not
supplied)intokeywayandremove
sealingplug.
3. To remove outlet connector, insert
key and remove as 2.
4. When refitting ensure‘o’seal is
located in recess of sealing plug
andoutletconnector.

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6. Attach the shower rose to the
showerarmand tighten. Shower Rose
Shower Arm
Support Bracket
WallPlate
Shower Arm
2.5 mm A/F
Hexagon Wrench
Shower Fittings
1. Temporarilyfittheshowerarmandthe
support bracket to the outlet of the
shower control and mark the hole
position. Ensure the support bracket
isfittednomorethan90mmbelowthe
top of the shower arm
Note!Useaspiritlevelorotherdevice
to ensure shower arm is vertical.
2. Removetheshower arm and support
bracket.
3. Drillthe wallandinsert a suitablewall
plug(supplied).Fitthewallplatetothe
wall.
4. Refittheshowerarm and support
bracket.Attach to the support
bracket to the wall plate.
5. Ensure supply pipework is flushed
throughbeforefitting shower rose.
90 mm Maximum