Mira Moto Operation manual

1
INSTALLATION & USER GUIDE
These instructions must be left with the user.
THERMOSTATIC MIXERS
MIRA MOTO, MIRA PACE,
MIRA MINILITE & MIRA MINIDUO

2
INTRODUCTION
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 Moto and Mira Minilite are thermostatic
mixers with a single control lever for on/off and
temperature control. They are supplied complete
with Mira L14A Shower Fittings.
The Mira Pace and Mira Miniduo are thermostatic
mixers with separate flow and temperature
controls. They are supplied complete with Mira
L98B Shower Fittings.
The thermostatic mixers incorporate 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.
Patents
Patents:
GB: 2 291 693, 2 340 210, 2 392 225,
2 421 297
France: 0 694 721
Germany:695 13 455.8
Patent Applications:
Euro: 03254070.0, 1 672 257
USA: 2006-0124758-A1
CONTENTS
Introduction 2
Patents 2
Safety Warnings 3
Pack Contents 4
Specications 5
Pressures 5
Temperatures 5
Thermostatic Shut-down 5
Connections 5
Dimensions 6
Installation 7
Suitable Plumbing Systems 7
General 7
Exposed Thermostatic Mixers 8
Installing the Thermostatic Mixer 8
Installing the Built-in Thermostatic Mixer 11
Commissioning 16
Maximum Temperature Setting 16
Operation 17
User Maintenance 18
Fault Diagnosis 18
Lubricants 18
Cleaning 18
Accessories 18
Notes 19
Spare Parts 22
Customer Service Back Page
If you experience any difficulty with the
installation or operation of your new
thermostatic mixer, please refer to ‘Fault
Diagnosis’, before contacting Kohler Mira Ltd.
Our telephone and fax numbers can be found
on the back cover of this guide.

3
PACK CONTENTS
Tick the appropriate boxes to familiarise yourself
with the part names and to conrm that all of the
parts are included.
Documentation
q1 x Guarantee Registration Document
q1 x Installation Template
q2 x Concealing Plates
q2 x Compression Nuts
q2 x Olives
q2 x Wall plugs
q2 x Fixing Screws
q1 x 2.5 mm Hexagonal Key
Mira Moto EV
Mira Pace EV
Mira Minilite EV
Mira Miniduo EV
q1 x ‘O’ Key

4
Mira Minilite BIV
Mira Miniduo BIV
q3 x Compression Nuts
q3 x Olives
q5 x Wall plugs
q5 x Fixing Screws
q1 x 2.5 mm Hexagonal Key
q1 x Concealing Plate
Assembly
Documentation
q1 x Guarantee Registration Document
q1 x Cardboard Building-in Shroud
q1 x ‘O’ Key
q1 x Flow Regulator (12 L/Min)
SAFETY WARNINGS
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 manufacturers
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 dif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 changes in blend temperature.
7. Care is required when adjusting flow 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.

5
SPECIFICATIONS
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 shower handset outlet).
Note! For gravity fed / other low pressure
systems (0.5 bar or below) remove the ow
regulator(s).
For optimum performance supplies should be
nominally equal.
Temperatures
Factory Pre-set (Blend) Shower: 43°C.
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
affect 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 Differential between
Hot Supply and Outlet Temperature: 12°C.
Thermostatic Shut-down
For safety and comfort the thermostat will
shut off the mixing valve within 2 Seconds if
either supply fails. (achieved only if the blend
temperature has a minimum differential of
12°C from either supply temperature).
Connections
Inlets: 15 mm Compression.
Outlet: ½” BSP Flat Face / 15 mm
Compression
Standard connections are: hot - left, cold
- right, outlet - bottom (EV models), top
(BIV models).
•
•
•
•
•
•
•
•
•
•
•
•
•
Flow Regulators
Site conditions and thermostatic mixer model will
determine the ow regulator requirements.
For gravity systems (0.5 bar or below) remove the
inlet and outlet ow regulators (where tted).
Model Cold Inlet Outlet
Moto
ü
(supplied tted in
the outlet nipple)
Pace ü
ü
(supplied tted in
the outlet nipple)
Minilite EV
ü
(supplied tted in
the outlet nipple)
Minilite BIV
ü
(supplied in the
component pack)
Miniduo EV ü
ü
(supplied tted in
the outlet nipple)
Miniduo BIV ü
ü
(supplied in the
component pack)
Flow Regulator Removal
Inlet Flow Regulator
Inlet Elbow
Nipple
Outlet Flow Regulator
Grubscrew

6
Dimensions
Mira Moto and Mira Minilite EV
Mira Pace and Mira Miniduo EV
All dimensions in mm
110
76.5
Ø54
Ø46
39
17
113
Ø54
39
17
125
110
Ø46
95
Note! If replacing an existing installation with pipework
centres between 133 mm and 153 mm a universal retrot
accessory kit is available, refer to section: ‘Accessories’.
See Note! below
See Note! below
Mira Minilite BIV
Mira Miniduo BIV
103
103
Ø183
56-76 39-59
21
20
56-76 53-73
21
20
Ø183

7
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).
Unvented Mains Pressure System:
The thermostatic mixer can be installed with an
unvented, stored hot water system.
Pumped System:
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.
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 handset (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.
25 mm
Spill Over
Level

8
Exposed Thermostatic Mixers
For Built-in Thermostatic Mixers go to section:
‘Installation, Built-in Thermostatic Mixers’.
Installing the Thermostatic Mixer
1. The thermostatic mixer can be installed with
rear, rising or falling supply inlets. Decide
on the most appropriate method for your
installation, and if necessary, loosen the
grubscrews and rotate the inlet elbows to
suit.
Important! Make sure that the elbows are
pushed fully onto the mixer before tightening
the grubscrews.
Important! A ow regulator is tted inside the
cold inlet elbow (some models). This can be
removed for gravity fed / other low pressure
systems (0.5 bar or below), refer to section:
‘Specications,FlowRegulators’.
2. 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 39 mm from the centre of pipe
to the nished wall at 110 mm centres.
Note! If replacing an existing installation
with pipework centres between 133 mm and
153 mm a universal retrot accessory kit is
available, refer to section: ‘Accessories’.
39 mm
3. For solid walls drill the holes for the backplate
with a 6 mm drill and insert the wall plugs
(supplied). For other types of wall structure
alternative fixings may be required (not
supplied).
6 mm Drill
Wall Plug
4. For Rear Entry Supplies Only:
a) Drill the holes for the supply pipes at
110 mm centres.
Note! Recess the inlet holes Ø19 mm x
2 mm deep to allow for the concealing
plates.
5. Fit the supply pipework: Hot - Left, Cold
- Right. The inlet pipework should extend
23 mm from the nished wall surface.
Note! If it is not possible to install the
mixer with this pipework conguration follow
instruction 6.

9
23 mm from nished
wall surface
Elbow
Recess Ø19 mm
x 2 mm deep
23 mm
110 mm
HOT
COLD
6. Reverse Inlet Supplies Only:
a) Using a suitable tool, carefully remove the
plug cap from the centre of sealing plug
to reveal keyway.
b) Remove the sealing plug using the ‘O’ key
(supplied) or a 12 mm hexagonal key.
c) Carefully remove the ow regulator from
the outlet nipple, then remove the outlet
nipple using the ‘O’ key (supplied) or a
12 mm hexagonal key.
d) Ret the sealing plug and outlet nipple in
the opposite outlets and tighten.
Note! Make sure that the ‘O’ seals are
correctly tted.
e) Ret the ow regulator, make sure that it
is tted correctly, refer to illustration.
f) Rotate the mixer 180°.
g) The control knob(s) will have to be
realigned, this can be completed in
section: ‘Commissioning’.
Plug Cap
Sealing Plug
‘O’ Seal
Outlet Nipple
Flow Regulator
7. Remove the backplate from the mixer by
loosening the grubscrew with a 2.5 mm
hexagonal key (supplied).
8. Secure the backplate to the wall using the
screws (supplied).
Screw
Backplate

10
9. For Rear Entry Supplies Only:
a) Fit the concealing plates over the inlet
pipes.
Note! Apply silicone sealant to the back
face of the ange.
Apply Silicone Sealant
Concealing Plate
10.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.
11.Fit the compression nuts and olives onto the
pipework.
12. Align the mixer with the pipework and t onto
the backplate.
Important! Make sure that the hot and cold
inlets on the mixer correspond with the hot and
cold inlet supplies.
13.Tighten the compression nuts onto the mixer
with a suitable spanner.
Caution! Take care not to damage the chrome
surfaces.
14.Tighten the grubscrew to secure the mixer to
the backplate.
Olive
Compression Nut
15. Fit the shower ttings, refer to your shower
fittings installation and user guide for
instructions.
Important! A 12 litre/minute ow regulator
is tted inside the outlet nipple. This can be
removed for gravity fed / other low pressure
systems (0.5 bar or below), refer to section:
‘Specications,FlowRegulators’.
16.Turn on the hot and cold water supplies and
check for leaks.
17.Before using the shower, refer to section:
‘Commissioning’.

11
Installing the Built-in Thermostatic
Mixer
1. Carefully remove the concealing cap from the
control knob.
2. Unscrew the grubscrew using a 2.5 mm
hexagonal key (supplied) and pull off the
control knob(s).
Flow Control Knob
Temperature
Control Knob
Grubscrew
Grubscrew
Concealing Cap
Concealing Cap
Control Knob
3. Carefully remove the concealing ring from the
concealing plate.
Concealing Ring
Concealing Plate
4. Determine the route for the hot and cold
supply pipework and for the outlet pipework.
When connecting to the BIV shower ttings it
is recommended that the outlet be positioned
to one side of the mixer. This is to prevent
the exible hose from obstructing the shower
controls (refer to illustration).
103 mm
Outlet Pipe BIV
Cold InletHot Inlet
Thermostatic
Mixer
Alternative Pipe layouts
Outlet Pipe BIV
5. Mark the routes for the hot and cold supply
pipework at 103 mm centres (Hot - Left, Cold
- Right).
Note! If it is not possible to install the
mixer with this pipework conguration follow
instruction 6.
Falling Supplies: For falling supplies loosen
the grubscrew on each elbow using the 2.5 mm
hexagon key (supplied). Remove the elbows
and install on opposite sides. Retighten the
grubscrews.
Important! Make sure that the elbows are
pushed fully onto the mixer before tightening
the grubscrews
Important! A ow regulator is tted inside the
cold inlet elbow (some models). This can be
removed for gravity fed / other low pressure
systems (0.5 bar or below), refer to section:
‘Specications,FlowRegulators’.

12
6. Reverse Inlet Supplies Only:
a) Remove the sealing plug using the ‘O’ key
(supplied) or a 12 mm hexagonal key.
b) Remove the outlet nipple using the ‘O’ key
(supplied) or a 12 mm hexagonal key.
c) Ret the sealing plug and outlet nipple in
the opposite outlets and tighten.
Note! Make sure that the ‘O’ seals are
correctly tted.
d) Rotate the mixer 180°.
e) If necessary, loosen the grubscrew on
each elbow using the 2.5 mm hexagon
key (supplied). Remove the elbows and
install on opposite sides. Retighten the
grubscrews.
Important! Make sure that the elbows
are pushed fully onto the mixer before
tightening the grubscrews.
Plug Cap
Sealing Plug
‘O’ Seal
Outlet Nipple
7. Determine the position of the mixer and draw
around the inside of the concealing ring.
Top
Concealing Ring
8. Carefully cut away the plasterboard and/or
brick work to a depth of between 56 and 76 mm
from the nishedwallsurface.
Important! Take care to stay within the marked
out diameter otherwise the concealing ring will
not seal.
Finished Wall
Surface
56 - 76 mm
Rear Mounting
9. Fit the concealing ring over the mixer body,
then, holding the mixer level, central and
square in the hole, mark the positions of the
two backplate xing holes on the wall.
Backplate Fixing Hole
Backplate Fixing Hole
10.For solid walls drill two 6 mm holes for the
wall plugs. For other types of wall structure
alternative fixings may be required (not
supplied).
11.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.

13
12.Insert the wall plugs (supplied) and attach
the mixer to the wall or timber noggin with the
screws provided.
13.Fit the compression nuts and olives onto the
pipework, connect the pipes and tighten the
compression nuts.
Important! Make sure that the outlet pipework
protrudes through the wall by approximately
30 mm and temporarily cap off.
Important! For stud partition/laminated panel
installations t the wallplate over the outlet
pipework on the inside of the panel. The outlet
pipework should then be installed through a
25 mm hole in the panel.
Screws
Outlet Pipe to Fittings
Hot Supply
Cold Supply
14.Turn on the water supplies and check for
leaks.
15.Determine the nished wall position (e.g. tile
thickness). Turn off the water supply, carefully
uncap the outlet pipe and cut to length, the
outlet pipe must protrude through the nished
wall surface by 21–23 mm.
Note! Remove any burrs from the pipes before
proceeding.
16.For solid wall installations go to instruction
17.
For stud partition/laminated panel installations,
nish the wall, then go to instruction 25.
Important! Make sure that you use the
cardboard building-in shroud when nishing
the wall. This will protect the valve and make
sure that you tile up to the correct diameter.
Caution! Make sure that the nished wall is
within the maximum and minimum limits and to
an even depth (no greater than 2 mm variation)
or the controls will not t correctly.
Cardboard
Building-in Shroud
17.Loosely screw the RAC backplate to the
wallplate, using the two backplate screws
provided.
18.Place the backplate/wallplate assembly over
the outlet pipe with the arrow pointing vertically
up. The screw holes should be at 40° to the
horizontal.
19. Mark the positions of the two wallplate xing
holes.
Wallplate
RAC Backplate
Backplate Screws
Arrow
40°

14
20.Remove the assembly from the wall and
separate the backplate from the wallplate.
21.For solid walls drill two 6 mm holes for the
wall plugs. For other types of wall structure
alternative fixings may be required (not
supplied). If necessary, make a recess 6 mm
deep to accept the wallplate for ush tting of
the outlet to the wall surface.
Caution! Make sure that you do not drill into
pipework in the wall.
22.Fit the two wall plugs supplied and secure
the wallplate to the wall with the two wallplate
screws.
23.Make sure that there is clearance behind the
wallplate and temporarily t the two backplate
screws into the wallplate. This will prevent
the xing holes from becoming blocked with
plaster or grout.
24.Finish the wall, e.g. tiles. then remove the two
backplate screws.
Important! Make sure that you use the
cardboard building-in shroud when nishing
the wall. This will protect the valve and make
sure that you tile up to the correct diameter.
Cardboard
Building-in Shroud
Caution! Make sure that the nished wall is
within the maximum and minimum limits and to
an even depth (no greater than 2 mm variation)
or the controls will not t correctly.
25.Place the backplate over the outlet pipe with
the arrow pointing vertically up and tighten the
two backplate screws. Make sure that the foam
seal abuts the nished wall surface.
26.Check that the ‘O’ seal is tted inside the
backplate nut. Fit the olive and the backplate
nut over the outlet pipe and tighten the nut.
27.Check that the second ‘O’ seal is tted to the
outside of the backplate nut. Press the elbow
onto the backplate, make sure that the clips
on the elbow engage with the backplate.
28.Press the shroud over the elbow, make
sure that it engages with the lugs on the
backplate.
Backplate Nut
Olive
Elbow
Shroud
29.Fit the concealing ring over the mixer and mark
the positions of the three xing holes.
30.For solid walls drill three 6 mm holes for the
wall plugs. For other types of wall structure
alternative fixings may be required (not
supplied).
Caution! Make sure that you do not drill into
pipework in the wall.
31.Insert the wall plugs (supplied) and attach the
concealing ring to the wall with the screws
provided.
Important! Apply silicone sealant to the
groove on the rear face of the concealing
ring

15
Concealing Ring
Apply Silicone
Sealant
Screws
32.Fit the concealing plate to the concealing
ring.
33.Ret the control knobs.
34 Fit the shower ttings, refer to your shower
fittings installation and user guide for
instructions.
Important! Make sure that the 12 litre/minute
ow regulator (supplied) is tted under the
hose washer (refer to illustration).
Note! This can be left out for gravity fed / other
low pressure systems (0.5 bar or below).
Hose Washer
Flow Regulator
35.Turn on the hot and cold water supplies and
check for leaks.
36.Before using the shower, refer to section:
‘Commissioning’.

16
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 approximately
43°C at the factory but due to variations in site
conditions the maximum temperature may need
adjustment.
Note! Make sure that the hot water temperature is
at least 55°C and that there is sufcient supply.
1. Turn on the mixer to the maximum temperature
and maximum ow (i.e. fully anticlockwise) and
allow the temperature to stabilise.
If the temperature is too hot or too cold adjust
as follows:
2. Carefully remove the concealing cap from the
control knob.
3. Loosen the control lever grubscrew with the
2.5 mm hexagon key (supplied) and pull off
the control lever.
4. If applicable unscrew the hub retaining screw
with a 2.5 mm hexagon key.
Note! Do not remove the hub.
Control Lever
Hub Hub Retaining
Screw
Grubscrew
+
-
+
-
Concealing Cap
2.5 mm Hexagonal Key
Flow Control
Lever
Mira Miniduo
/ Mira Pace
Mira Minilite
/ Mira Moto
5. Insert the 2.5 mm hexagon key into the centre
of the spindle and engage with the recessed
temperature adjusting screw.
6. Rotate the hexagon key until the required
maximum temperature is obtained at the
shower. Anticlockwise to increase the
temperature, or clockwise to decrease the
temperature (¼ turn = approximately 1°C).
7. Once the desired maximum blend temperature
has been achieved turn off the mixer by
rotating either the hub or ow control lever
(depending on model) fully clockwise.
Note! Do not remove the hub.
8. If applicable ret the hub retaining screw.
9. Ret the control lever with the lever at the top
and retighten the grubscrew.
10.Check that the shower temperature is
correct.

17
OPERATION
The Mira Moto and Mira Minilite thermostatic
mixers have a single sequential control lever for
on/off and temperature control.
The control lever operates anti-clockwise in the
following sequence:
Off
On
Cold
Warm
Maximum Preset Temperature
•
•
•
•
•
Maximum Preset
Temperature
Off
The Mira Pace and Mira Miniduo thermostatic
mixers have separate control levers for on/off
and temperature.
The control levers operate anti-clockwise in the
following sequence:
Off
Turn the Temperature Control
Handle clockwise to decrease the
temperature and anticlockwise to
the preset maximum temperature
Turn the Flow Lever
anticlockwise to the
preset maximum ow
On
Hot
Cold

18
ACCESSORIES
1663.012UniversalRetrotAccessoryKit:
Universal retrofit accessory kit comprising of
extendable elbows and an adjustable backplate,
designed to allow the thermostatic mixer to accept
pipework centres from 133 mm to 153 mm for
retro-t installations. Available as an optional
accessory from your Kohler Mira stockists.
USER MAINTENANCE
If you require a Mira trained service engineer or
agent, refer to section: ‘Customer Services’.
Fault Diagnosis
Symptom:
Only hot or cold water from the mixer outlet.
Outlet temperature too hot / too cold.
CauseRectication:
Inlets reversed (hot supply to cold
supply). Refer to section: ‘Reversed Inlet
Supplies’.
No hot water reaching mixer.
Check the lters for any blockage.
Installation conditions outside operating
parameters, refer to sections: ‘Specications’
and ‘Commissioning’.
—————————————
Symptom:
Fluctuating or reduced ow rate.
CauseRectication:
Check the shower handset, hose and lters
for any blockage.
Make sure that the maintained inlet pressures
are nominally balanced and sufcient, refer
to section: ‘Specications’.
Make sure that the inlet temperature
differentials are sufcient, refer to section:
‘Specications’.
Flow regulator tted incorrectly.
Air lock or partial blockage in the pipework.
—————————————
Symptom:
Water leaking from shower handset.
CauseRectication:
Normal for a short period after shut off.
Check that the pressures are not in excess of
the specications for the product.
Renew the thermostatic cartridge.
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
•
Lubricants
Silicone based lubricants must only be used on
the rubber seals.
Caution! Oil based or other lubricant types may
cause rapid deterioration of seals.
Cleaning
The chrome plated parts should be cleaned using
a mild washing up detergent or soap solution,
rinsed and then wiped dry with a soft cloth.
Warning! Many household cleaners contain
abrasive and chemical substances, and should not
be used for cleaning plated or plastic ttings.
Do not use descalents on this product.

19
NOTES

20
NOTES