Mira Virtue Operation manual

1
1350004-W2-A
Installation & User Guide
These instructions must be left with the user
Mira Virtue
Thermostatic Mixer

2
1353004-W2-A
Important Safety Information
Mira thermostatic mixers are precision engineered and should give
continued safe and controlled performance, provided:
1. They are installed, commissioned, operated and maintained in
accordance with manufacturer’s recommendations.
2. Periodic attention is given, when necessary, to maintain the product
in good functional order.
Caution!
1. Read all of these instructions.
2. Retain this guide for later use.
3. Pass on this guide in the event of change of ownership of the
installation site.
4. Follow all warnings, cautions and instructions contained in this
guide.
5. Anyonewhomayhavedi󰀩cultyunderstandingoroperatingthe
controls of any shower should be attended whilst showering.
Particular consideration should be given to the young, the elderly,
theinrmoranyoneinexperiencedinthecorrectoperationofthe
controls.
6. Rapid/Excessivemovementoftheowand/ortemperaturecontrol
levers may result in momentary unstable blend temperatures.
7. Careisrequiredwhenadjustingowortemperature,makesure
that the temperature has stabilised.
8. When this product 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.
9. The function of a thermostatic mixing valve is to deliver water
consistentlyatasafetemperature.Inkeepingwitheveryother
mechanism, it cannot be considered as functionally infallible and
as such, cannot totally replace a supervisor’s vigilance where that
is necessary. Provided it is installed, commissioned, operated and
maintained within manufacturers recommendations, the risk of
failure, if not eliminated, is reduced to the minimum achievable.

3
1350004-W2-A
Product Model
Number Colour
Mira Virtue 1.1927.002
Chrome
Mira Virtue with Diverter 1.1927.001
Introduction
Guarantee
For domestic installations, Mira Showers guarantee the Mira Virtue against any
defectinmaterialsorworkmanshipforaperiodofveyearsfromthedateofpurchase
(showerttingsforoneyear).
For non-domestic installations, Mira Showers guarantee the Mira Virtue 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.
ThankyouforpurchasingaqualityMiraproduct.Toenjoythefullpotentialofyour
newproduct,pleasetaketimetoreadthisguidethoroughly,havingdoneso,keep
it handy for future reference.
The Mira Virtue thermostatic mixer is a thermostatic shower control with a single
controlleverforon/o󰀨andtemperaturecontrol.A12L/Minowregulatorissupplied
for high pressure systems to reduce excessive shower force.
The thermostatic mixer incorporates a wax capsule temperature sensing unit, which
provides an almost immediate response to changes in pressures or temperature of
the incoming water supplies to maintain the selected temperature. An adjustable
maximum temperature stop is provided which limits the temperature to a safe level.
Inletltersarettedtoprotectthethermostaticcartridge.
Mira Virtue:ThermostaticMixerforconnectiontorising,fallingorrearentrypipework,
supplied with a deluge head.
Mira Virtue with Diverter: Thermostatic Mixer for connection to rising or rear entry
pipework,suppliedwithadivertervalvewhichgivestheoptionofusingthehandset,
deluge head or both.
Mira Mixer Showers covered by this guide:

4
1353004-W2-A
Recommended Usage
Recommended Usage
Domestic 
LightCommercial 
Heavy Commercial 
Healthcare 
Patents and Design Registration
GB: 2 291 693, 2 392 225, 2 422 886
Euro: 1672257DEFRGBITNLSE
USA: 7 240 850
Patent Applications:
Euro: 07015846.4
USA: 2006-0124758-A1, 2010-0219255-A1

5
1350004-W2-A
Pack Contents
Ticktheappropriateboxestofamiliariseyourselfwiththepartnamesandtoconrm
that all of the parts are included.
q2 x Concealing Plates
q2xCompressionNuts(15mm)
q2xOlives(15mm)
q5 x Wall Plugs
q2 x Fixing Screws
q1 x 2.5 mm Hexagonal Key
q1 x ‘O’ Key
q1 x Flow Regulator & Adapter
q1 x Thermostatic Mixing Valve
q1 x 3 mm Hexagonal Key
q1 x Cartridge Removal Tool
q4xCompressionNuts(18mm)
q4xOlives(18mm)
q3xFixingScrews(Chrome-WallBracket)
q1 x Deluge Head
q1 x Shower Arm
q1xWallBracket
q1 x Rigid Riser
Mira Virtue
1 x Installation & User Guide
1 x Guarantee Registration Document
1 x Installation Template

6
1353004-W2-A
q2 x Concealing Plates
q2xCompressionNuts(15mm)
q2xOlives(15mm)
q5 x Wall Plugs
q2 x Fixing Screws
q1 x 2.5 mm Hexagonal Key q1 x 3 mm Hexagonal Key
q1 x ‘O’ Key
q1 x Flow Regulator & Adapter
q1 x Thermostatic Mixing
Valve
q1 x Hose Sleeve
q1 x Cartridge Removal Tool
q6xCompressionNuts(18mm)
q6xOlives(18mm)
q3 x Fixing Screws
 (Chrome-WallBracket)
q1 x Deluge Head
q1 x Shower Arm
q1 x Diverter Valve
Mira Virtue with Diverter
q1xWallBracket
q1 x Rigid Riser
 (Long)
q1 x Rigid Riser
 (Short)
q1 x Showerhead
q1 x Shower Hose
q2 x Hose Washers
1 x Installation & User Guide
1 x Guarantee Registration Document
1 x Installation Template

7
1350004-W2-A
Specications
Pressures
• Max Static Pressure: 10 Bar.
• Max Maintained Pressure: 5 Bar.
• MinMaintainedPressure(GravitySystem):0.1 Bar (0.1 bar = 1 Metre head from
coldtankbasetoshowerheadoutlet).
Note! Forgravityfedorotherlowpressuresystems(0.5barorbelow)donott
theoutletowregulator.
• For optimum performance supplies should be nominally equal.
Temperatures
• Factory Pre-set at safe temperature under ideal inlet supply conditions. See
‘Commissioning’.
• Optimum Thermostatic Control Range: 35°C to 43°C (achieved with supplies of
15°Ccold,65°Chotandnominallyequalpressures).
• Recommended Hot Supply: 60°C to 65°C Note! The mixing valve can operate
at higher temperatures for short periods without damage, however this could
detrimentallya󰀨ectthermostaticperformance.Forsafetyandperformancereasons
it is recommended that the maximum hot water temperature is limited to 65°C.
• Cold Water Range: up to 25°C.
• MinimumRecommendedDi󰀨erentialbetweenHotSupplyandOutletTemperature:
12°C.
Thermostatic Shut-down
• For safety and comfort the thermostat will shut o󰀨 the mixing valve within 2
Seconds if either supply fails (achieved only if the hot water supply temperature
is12°Cabovethesetblendtemperature).
Connections
• Inlets: 15 mm Compression.
• Outlet: ½” BSP Flat Face / 15 mm Compression
• Standard connections are: hot - left, cold - right, outlet - top.
Flow Rates
0
5
10
15
20
25
30
35
00.5 1.51.
02
2.5
Flow Rate (L/min)
Supply Pressure (Bar)
COMBINED FLOW RATE
OVERHEAD FLOW RATE
HANDSET FLOW RATE

8
1353004-W2-A
413
164
156
153
216
59
1050
35
80
Dimensions
216
Mira Virtue
Mira Virtue with Diverter 413
164
1006
313
153
80 59
216
35
156
All dimensions in mm
153 156
216
156
153
413
413
313
164
1006
35
35
59
80
164
1050
59
80

9
1350004-W2-A
Installation
Suitable Plumbing Systems
Gravity Fed:
Thethermostaticmixermustbefedfromacoldwatercistern(usuallyttedinthe
loftspace)andahotwatercylinder(usuallyttedintheairingcupboard)providing
nominally equal pressures.
Mains Pressurised Instantaneous Hot Water System (Combination Boiler):
The thermostatic mixer can be installed with systems of this type with balanced
pressures. (Recommended Minimum Maintained Pressure: 1.0 Bar).
Thereisnoowadjustmentwiththisproduct.A12l/minowregulatorissupplied
and is recommended to be tted in High Pressure systems(see Flow Regulator
Installation)
Unvented Mains Pressure System:
The thermostatic mixer can be installed with an unvented, stored hot water system.
Thereisnoowadjustmentwiththisproduct.A12l/minowregulatorissupplied
and is recommended to be tted in High Pressure systems(see Flow Regulator
Installation)
Pumped Systems:
Thethermostaticmixercanbeinstalledwithaninletpump(twinimpeller).Thepump
must be installed in a suitable location and in accordance with its instructions.
General
Installation must be carried out in accordance with these instructions, and must be
conductedbydesignated,qualiedandcompetentpersonnel.
The installation must comply with the “Water Supply Regulations 1999 (Water
Fittings)”oranyparticularregulationsandpractices,speciedbythelocalwater
companyorwaterundertakers.
Note!Makesurethatallsiterequirementscorrespondtotheinformationgivenin
section: ‘Specications’.
1. The Mixer must not be installed in an area where it may freeze.
2. Forstudpartitionsalternativexingsmayberequired.
3. Isolating valves must be installed close to the Mixer for ease of maintenance.
4. Pipeworkmustberigidlysupportedandavoidanystrainontheconnections.
5. Pipeworkdead-legsshouldbekepttoaminimum.

10
1353004-W2-A
Flow Regulator Installation
FlowregulatorsaresuppliedwiththisproductandshouldbettedinHighPressure
systems to either;
1. Reduce Excessive Force and Flow Rate
2. Reduce Noise through the mixer due to high or unequal pressures
3. Stabilise incoming supply temperatures
25 mm Spill
OverLevel
Hose Retaining Ring
6. Decide on a suitable position for the Mixer. The position of the Mixer and
the Shower Fittings must provide a minimum gap of 25 mm between the
spill-overleveloftheshowertray/bathandtheshowerhead(refertoillustration).
Thisistopreventback-siphonage.Forfurtherinformationontheinstallation
of your Shower Fittings, refer to the Fittings Installation and User Guide.
Note! Only use Shower Fittings recommended by the manufacturer or supplier.

11
1350004-W2-A
Warning! Isolate the water supplies before installing the shower .
1
Usetheinstallationtemplatetomarkthe
positions of the holes for the backplate
and the pipe centres.
For rising or falling supplies the pipe
positions should be set 35 mm from
thecentreofpipetothenishedwallat
153 mm centres.
2
The thermostatic mixer can be installed
with rear or falling supply inlets. Decide
on the most appropriate method for
your installation, and if necessary, the
inlet elbows can be swivelled to suit.
Note! The Mira Virtue with Diverter
cannot be installed with a falling
supply.
35 mm
Installation of Mira Virtue Mixer
3
Fitthesupplypipework:Hot - Left, Cold - Right. For rear entry supplies the inlet
pipeworkshouldextend28mmfromthenishedwallsurface,forrisingorfalling
suppliesthecentreofthepipeshouldbeset35mmfromthenishedwallsurface.
Note! If it is not possible to install the mixer with this pipework conguration
complete the installation then refer to section: ‘Reversed Inlet Supplies’.
HOT COLD
Ø19 mm
28 mm from finished
wall surface
Elbow
Diameter 19 mm
x 2 mm deep
28 mm
153 mm
HOT
COLD

12
1353004-W2-A
4
Forsolidwalls,drilltheholesforthebackplatewitha6mmdrillandinsertthe
wall plugs.
Note!Forothertypesofwallstructurealternativexingsmayberequired
(notsupplied).
DO NOTdrillthroughthebackplateintothewall.
DO NOT drill into buried cables or pipes.
Ø 6 mmdrillrequiredforwallplugssupplied
5
Removethebackplatefromthemixerbylooseningthegrubscrewwitha2.5mm
hexagonalkey.
Backplate

13
1350004-W2-A
6
Fixthebackplatetothewall,2xNo.8x1¼”screwsandwallplugsaresupplied.
For Rear Entry Supplies Only:
Note! Falling supplies are not suitable for Mira Virtue with diverter.
Fit the concealing plates over the inlet pipes.
Note! Apply silicone sealant to the back face of the concealing plate.
Flush the water supplies thoroughly before connecting the shower unit.
Caution! It is essential at this point that the supply pipework is thoroughly
ushed through before connection to the mixer. Failure to do so may result in
product malfunction and will not be covered under the guarantee.
FALLINGSUPPLIES REARSUPPLIES
7
Silicone
sealant
Concealing Plate

14
1353004-W2-A
Tightenthegrubscrewtosecurethemixertothebackplate.DO NOT overtighten
the screw.
Fittheshowerunitoverthebackplateandxtothepipework.Avoiddamageto
thechromenishwhentighteningthecompressionnuts.
9
8

15
1350004-W2-A
Rigid Riser
Pipe
Horizontal
Arm
WallBracket
Showerhead
Flow Regulator
Adapter
1. Temporarilyttherigidriserpipeandwallbrackettotheshowercontroloutlet
andmarkthepositionofthewallbracket.Useaspiritleveltoensurethepipe
is vertical. Drill the holes and insert the wall plugs.
Note! The vertical rigid riser pipe can be shortened if required. De-burr the pipe
endsbeforemakingthenalconnection.
2. Fix the wall bracket, rigid riser pipe, horizontal arm and tighten the three
compressionttingsontheshowercontroloutletandhorizontalarm.
Note!Caremustbetakenwhentighteningcompressionnutssothatyoudo
not damage the plated surfaces.
3. Turnonthehotandcoldwatersuppliesandcheckforleaks.
4. Thoroughlyushtheoutletpipeworkbeforeconnectingtheshowerhead.Slide
thecompressionnutandoliveoverthehorizontalarmandmaketheconnection
to the shower head.
Note!Ifttingtheowregulator,makesurethatitisttedatthisstage.
5. Before using the shower, refer to section: ‘Commissioning’.
10 Installation of Shower Fitting
A. Mira Virtue

16
1353004-W2-A
B. Mira Virtue with Diverter
1. Refer to ‘Mira Virtue, paragraphs 1 to 9’ to install the mixer.
2. Temporarilyttherigidriserpipe(short),diverter,rigidriserpipe(long)andwall
brackettotheshowercontroloutletandmarkthepositionofthewallbracket.
Use a spirit level to ensure the pipes are vertical. Drill the holes and insert the
wall plugs.
Note!Ifttingtheowregulator,makesurethatitisttedatthisstage.
Note! The vertical rigid riser pipes can be shortened if required. De-burr the
pipeendsbeforemakingthenalconnection.
Note! The short and long riser pipes can be swapped around if the handset is
required at a higher position.
Showerhead
Rigid Riser
Pipe(long)
Horizontal Arm
WallBracket
Rigid Riser
Pipe(short)
Parking
Socket
Adapter
Flow
Regulator
Diverter
Shower Hose
Showerhead
Parking
Socket
Sleeve

17
1350004-W2-A
3. Fixtherigidriserpipes,diverterwallbracketandtightenthefourcompression
ttings on the shower control outlet. Fit the horizontalarm and tighten the
compressiontting.
Note!Caremustbetakenwhentighteningcompressionnutssothatyoudo
not damage the plated surfaces.
4. Turnonthehotandcoldwatersuppliesandcheckforleaks.
5. Thoroughlyushtheoutletpipeworkbeforeconnectingtheshowerhead.Slide
thecompressionnutandoliveoverthehorizontalarmandmaketheconnection
to the shower head.
6. Connecttheshowerhosetotheoutletofthediverter.Makesurethatthehose
washeristted.
7. Passthehosethroughtheparkingsocket.
8. Stretchtheparkingsocketsleeveoverthehoseusingthesplit.Squeezethe
parkingsocketsleevetotitintotheparkingsocket.Ensurethesplitisatthe
backandthetagisfacingthediverter.
9. Connecttheshowerhead.Makesurethatthehosewasheristted.
10. Locatetheshowerheadintheparkingsocket.
11. Before using the shower, refer to section: ‘Commissioning’.
Reversed Inlet Supplies
The Mira Virtue thermostatic mixer is supplied with inlet connections Hot - Left,
Cold - Right as standard. If the hot and cold water supply pipes have been reversed
during installation the thermostatic cartridge must be removed and rotated 180°.
1. Isolate the hot and cold water supplies and operate the control lever to relieve
pressure and drain any residual water.
2. Makesurethatthecontrolleverisinthe‘O󰀨’position.
3. Press and rotate the ceramic bezel anticlockwise by 90° to remove.
Careful! There is a spring behind the ceramic bezel.
4. Usinga3mmallenkey,removethehandlesecuringthescrewandwasher.
5. Pullo󰀨thehandletrimalongwithindicatortrim
Note!Theindicatortrimmaybetighttopullo󰀨
6. Remove the bearing and hub from mixer.
Ceramic Bezel
Screw
Handle Trim
Washer
Spring
Handle
Bearing
Indicator Trim
Hub

18
1353004-W2-A
Handle Trim
Bearing
Valve Body
Cut out
Indicator Trim
Hub
‘O’ Key
Cartridge
RemovalSocket
7. Fitthecartridgeremovalsocketand‘O’Key(supplied)ontothecartridgenut
andturnanticlockwise.Unscrewfullyandpullthecartridgefromthemixerbody.
8. Rotate the Cartridge 180°.
9. Makesurethatthetwocartridgeinletsealsarettedandcarefullypushintothe
body, aligning the cartridge lugs into the body slots.
Note!Checkthatthecartridgelugstamped‘H’isalignedwiththehotinletsupply.
Important!Takecarewhenttingthecartridgeasdamagetothecartridgeinlet
seals may result in dripping from the shower head.
10. Tightenthenutbyturningthe‘O’keyandthecartridgeremovalsocketclockwise.
11. Retthehubandbearing.Makesurethatthehubispositionedfullyclockwise.
12. Push on the indicator trim in the same orientation that you removed it. Note!
Ensure the lugs on the inside of the indicator trim matches up with the cut outs
on the valve body.
13. Retthehandletrim.
Internal View
Indicator Trim
Lug

19
1350004-W2-A
14. Fit the handle using the washer and screw.
Note! Makesurethewasheristtedashandlemaycomelooseduringuse.
15. Tighten the screw to secure the handle.
Screw
Washer
Handle
Handle Alignment
(Rear View
ofHandle)
Front View of Mixer
16.Pressandrotatetheceramicbezelclockwiseby90°toret.Careful! There is
a spring behind the ceramic bezel.
17. Checkthattheshoweringtemperatureiscorrect.
MiraVirtueLogo
BezelLugsAlignment
with Handle
Back View
Ceramic BezelHandle
Front View
Installed Ceramic Bezel

20
1353004-W2-A
Commissioning
Maximum Temperature Setting
Beforeusingtheshower,themaximumtemperaturemustbecheckedtomakesure
that it is at a safe level. It has been preset to a safe showering temperature under
ideal conditions at the factory, appropriate for most systems. However, site conditions
andpersonalpreferencemaymakeitnecessarytoresetthistemperature.
Note! Makesurethatthehotwatertemperatureisatleast55°Candthatthereis
su󰀩cientsupply.
1. Turnontheshowertothemaximumtemperature(i.e.fullyanticlockwise)and
allow the temperature to stabilise. If the temperature is too hot or too cold, turn
o󰀨theshowerandadjustasfollows:
2. Makesurethatthecontrolleverisinthe‘O󰀨’position.
3. Press and rotate the ceramic bezel anticlockwise by 90° to remove.
Careful! There is a spring behind the ceramic bezel.
4. Usinga3mmallenkey,removethehandlesecuringthescrewandwasher.
5. Remove the handle trim along with indicator trim.
6. Turn on the shower to the maximum temperature by rotating the hub fully
anticlockwiseandallowthetemperaturetostabilise.
7. Remove the bearing and hub from mixer.
8. Insertthe2.5mmallenkeyintothecentreofthespindleandengagewiththe
recessed temperature adjusting screw.
9.  Rotatetheallen key untiltherequiredmaximumtemperature is obtained at
theshower.Turnanticlockwiseto increase thetemperature,orclockwiseto
decreasethetemperature(¼turn=approximately1°C).
10. Oncethedesiredmaximumblendtemperaturehasbeenachievedturno󰀨the
shower.
Internal View
Indicator Trim
Lug
Ceramic
Bezel
3mm Allen Key
Spring
Screw
Washer
Handle
Handle
Trim
Bearing
Indicator Trim
2.5mm
Allen Key
Hub Valve Body
Cutout
Handle Alignment
(RearViewofHandle) Front View of Mixer