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INSTALLATION & USER GUIDE
These instructions must be left with the user.
THERMOSTATIC MIXERS
MIRA INFUSE & MIRA MINIBELLE
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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 Infuse and Mira Minibelle are thermostatic
mixers which have separate ow 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: 2 340 210, 2 392 223, 2 392 224
Patent Applications
Euro: 1 672 257
US: 2006-0124758-A1
CONTENTS
Introduction 2
Patents 2
Safety Warnings 3
Pack Contents 3
Specications 4
Pressures 4
Temperatures 4
Thermostatic Shut-down 4
Connections 4
Dimensions 4
Installation 5
Suitable Plumbing Systems 5
General 5
Flow Regulator 5
Installing the Thermostatic Mixer 6
Commissioning 9
Maximum Temperature Setting 9
Operation 9
Temperature Control 9
Flow Control 9
User Maintenance 10
Fault Diagnosis 10
Lubricants 10
Cleaning 10
Spare Parts 11
Customer Service Back Page
If you experience any difficulty with the
ins tallati on o r op era tion 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.
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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 difculty understanding
or operating the controls of any shower should
be attended whilst showering. Particular
consideration should be given to the young,
the elderly, the inrm 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 flow or
temperature, make sure that the temperature
has stabilised.
8.
Do not remove or tighten the body grubscrews
.
Caution! Do not remove or
tighten these grubscrews.
9. 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.
PACK CONTENTS
Tick the appropriate boxes to familiarise yourself
with the part names and to conrm that all of the
parts are included.
q 1 x M4 x 12 mm Grubscrew
q 2 x Olives
q 4 x Wall plugs
q 4 x Fixing Screws
q 1 x 2 mm Hexagonal Key
q 1 x Thermostatic Mixer
(supplied tted to the backplate)
q 1 x Concealing Plate
Documentation
q 1 x Guarantee Registration Document
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Dimensions
Ø47
107
59
174
Ø42
51
All dimensions in mm
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 outlet
ow regulator. Refer to section: ‘Installation,
Flow Regulator’.
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
The thermostatic mixer can only be installed with
rear supply inlets and the supply pipework must
be connected as follows:
Hot: Bottom (side nearest flow control), •
15 mm compression.
Cold: Top (side nearest temperature control), •
15 mm compression.
Outlet: ½” BSP Male to exible hose.•
Note! This product does not allow for reversed
inlets and will deliver unstable temperatures if
tted incorrectly.
Hot Cold
Outlet
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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, qualied and competent personnel.
The installation must comply with the “Water
Supply Regulations 1999 (Water Fittings)” or any
particular regulations and practices, specied by
the local water company or water undertakers.
Note! Make sure that all site requirements
correspond to the information given in section:
‘Specications’.
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
Flow Regulator
Site conditions will determine the ow regulator
requirements.
For gravity fed / other low pressure systems
(0.5 bar or below) remove the outlet flow
regulator.
Hose
Washer
Outlet Flow
Regulator
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Installing the Thermostatic Mixer
1. The thermostatic mixer must be tted vertically
as illustrated and can only be installed with
rear supply inlets. The supply pipework must
be connected as follows:
Hot to Bottom Inlet•
Cold to Top Inlet•
Bottom Outlet.•
Important! This product does not allow for
reversed inlets.
2. Determine the route for the hot and cold supply
pipework.
Hot Cold
Outlet
4. Loosen the 2 backplate grubscrews with
the 2 mm hexagon key (supplied) and pull
the mixer and concealing plate from the
backplate.
5. Unscrew the inlet nuts from the backplate.
Concealing Plate
Backplate
Inlet Nuts
6. Using the backplate as a guide, mark the
positions of the fixing holes and the pipe
centres.
Note! Make sure that the backplate is the
correct way up (refer to illustration).
Large boss must be
tted at the bottom
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7. For solid walls drill the xing holes for the
backplate with a 6 mm drill and insert the
wall plugs (supplied). For other types of wall
structure alternative xings may be required
(not supplied).
8. Drill the holes for the supply pipes and t the
supply pipework:
Hot to Bottom Inlet, Cold to Top Inlet
Note! The inlet pipework should extend
between 12 and 18 mm from the nished wall
surface.
Caution! Make sure that the pipework is not
damaged otherwise the olives will not seal.
9. Fit the backplate over the inlet pipes and
secure to the wall using the xing screws
(supplied).
Note! Make sure that the backplate is the
correct way up (refer to illustration).
10. Caution! It is essent ial at this p oi nt
that the supply pipework is thoroughly
ushedthroughbeforeconnectiontothe
mixer. Failure to do so may result in product
malfunction and will not be covered under the
guarantee.
11. Fit the olives onto the inlet pipework and tighten
the inlet nuts using a suitable spanner.
Caution! Do not overtighten.
Important! Make sure that the inlet lters are
tted in the inlet nuts as illustrated.
Filter
Fixing Screws
Cold Inlet
Hot Inlet
Inlet Nut
Olive
Large boss must be
tted at the bottom
12. Make sure that the concealing plate (with
the hole at the bottom) is loosely tted over
the mixing valve inlets and align the mixer
with the inlet nuts. Push on fully and tighten
the grubscrews to secure the mixer to the
backplate. Make sure that the grubscrews are
engaged fully in the valve body grooves.
Concealing Plate
Inlet Filters
13. Push the concealing plate onto the backplate,
secure with the M4 x 12 mm grubscrew.
Single grubscrew secures
the top inlet to the backplate
Two grubscrews securing both the
bottom inlet and the concealing
plate to the backplate.
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14. Fit the shower ttings, refer to your shower
fittings i nstal latio n 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).
Hose
Washer
12 L/Min Flow
Regulator
15. Turn on the hot and cold water supplies and
check for leaks.
16. Before using the shower, refer to section:
‘Commissioning’.
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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 sufcient supply.
1. Turn on the mixer to the maximum temperature
(i.e. f ully anti clockwise ) and allow the
temperature to stabilise.
2. Test that the temperature of the water from the
shower outlet is hot enough.
If the temperature is too hot or too cold adjust
as follows:
3. Carefully remove the concealing cap using a
suitable tool (i.e. stanley knife / thin blade).
4. Unscrew the securing screw and remove the
temperature lever bearing.
5. Lift the temperature lever and move it back one
serration on the temperature control gear.
6. Return the lever to the maximum temperature
stop and check the temperature, if it is still not
hot enough repeat the procedure.
Lift the temperature lever
and move back one serration
Concealing Cap
Temperature
Lever
Bearing
Re-engage with the control
gear and return to the
maximum temperature stop
Securing
Screw
Rubber Seal
Stanley Knife /
Thin Blade
7. Once the maximum temperature is satisfactory,
ret the temperature control bearing and t and
tighten the securing screw.
8. Ret the concealing cap, make sure that the
rubber seal is correctly tted.
OPERATION
Caution! Care is required when adjusting ow
or adjusting temperature. Make sure that the
temperature has stabilised.
The thermostatic mixers have separate control
levers for temperature and ow.
Temperature Control
Turn the temperature control lever clockwise to
decrease the temperature and anticlockwise to
the preset maximum temperature
On
-
+
Off
Flow Control
Turn the ow lever clockwise to the maximum
ow.
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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.•
CauseRectication:
Inlets reversed (hot supply to cold supply). •
Rework inlet pipework.
No hot water reaching mixer.•
Checktheltersforanyblockage.•
Installation conditions outside operating •
parameters, refer to sections: ‘Specications’
and ‘Commissioning’.
—————————————
Symptom:
Fluctuatingorreducedowrate.•
CauseRectication:
Checktheshowerhandset,hoseandlters•
foranyblockage.
Make sure that the maintained inlet pressures •
arenominallybalanced andsufcient,refer
to section: ‘Specications’.
Make sure that the inle t t emper ature •
differentialsare sufcient,refer to section:
‘Specications’.
Flowregulatorttedincorrectly.•
Airlockorpartialblockageinthepipework.•
—————————————
Symptom:
Water leaking from shower handset.•
CauseRectication:
Normal for a short period after shut off.•
Check that the pressures are not in excess of •
thespecicationsfortheproduct.
Renewthemixervalveassembly.•
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.
These nishes should be cleaned with a mild
washing up detergent or soap solution, and then
wiped dry using a soft cloth.
Use your thumb or a soft cloth to wipe any
limescale from the soft nozzles and the front
surface of the handset spray plate.
Do not use descalents on this product.
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SPARE PARTS
1660.157
Flow Knob Pack (Minibelle)
(also includes Securing Nut)
1660.158
Flow Knob Pack (Infuse)
(also includes Securing Nut)
1660.155
Temperature Knob
Pack (Minibelle)
1660.156
Temperature Knob
Pack (Infuse)
1660.150
Backplate
1660.151
Concealing Plate
1660.154
Mixer Valve Assembly
1660.153
Inlet Nuts & Olives (x2)
1660.152
Filter Pack (x2)
Not illustrated:
1660.159 Screw Pack
1660.175 Seal Pack
1660.169
Outlet Shroud and
Securing Nut (Infuse)
1660.168
Outlet Shroud and
Securing Nut (Minibelle)
1663.213
12 L/Min Flow Regulator
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CUSTOMER SERVICE
Guarantee of Quality
Mira Showers guarantee your product against any defect
in materials or workmanship for the period shown in the
Guarantee Registration Document included with your
shower.
Alternatively, to confi rm the applicable guarantee period
please contact Customer Services.
To validate the guarantee, please return your completed
registration card.
Within the guarantee period we will resolve defects, free
of charge, by repairing or replacing parts or modules as
we may choose.
To be free of charge, service work must only be undertaken
by Mira Showers or our approved agents.
Service under this guarantee does not affect the expiry
date.
The guarantee on any exchanged parts or product ends
when the normal product guarantee period expires.
Not covered by this guarantee:
Damage or defects arising from incorrect installation,
improper use or lack of maintenance, including build-up
of limescale.
Damage or defects if the product is taken apart, repaired or
modifi ed by any persons not authorised by Mira Showers
or our approved agents.
This guarantee is in addition to your statutory and other
legal rights.
What to do if something goes wrong
If when you first use your shower, it doesn’t function
correctly, fi rst contact your installer to check that installation
and commissioning are satisfactory and in accordance with
the instructions in this manual. We are on hand to offer you
or your installer any advice you may need.
Should this not resolve the diffi culty, simply contact our
Customer Services Te am who will give every assistance
and, if necessary, arrange for our service engineer to
visit. If the performance of your shower declines, consult
this manual to see whether simple home maintenance is
required. Please call our Customer Services Team to talk
the diffi culty through, request a service under guarantee
if applicable, or take advantage of our comprehensive
After-Sales service.
As part of our quality and training programme calls may be
recorded or monitored.
Our Customer Services Team is comprehensively trained to
provide every assistance you may need: help and advice,
spare parts or a service visit.
Spare Parts
We maintain an extensive stock of spares and aim to provide
support throughout the product’s expected life.
Spares can be purchased from approved stockists or
merchants (locations on request) or direct from Customer
Services.
Spares direct will normally be despatched within two working
days. Payment can be made by Visa or MasterCard at the
time of ordering. Should payment by cheque be preferred,
a pro-forma invoice will be sent.
All spares are guaranteed for 12 months from date of
purchase. Spares that have been supplied directly form us
can be returned within one month from date of purchase,
providing that they are in good order and the packaging
is unopened.
Note! Returned spares will be subject to a 15% restocking
charge and authorisation must be obtained before return.
Please contact our Customer Services Team.
Note! In the interests of safety, spares requiring exposure
to mains voltages can only be sent to competent persons.
Service
Our Service Force is available to provide a quality service
at a reasonable cost. Yo u will have the assurance of a Mira
trained engineer/agent, genuine Mira spare parts and a
12 month guarantee on the repair.
Payment should be made directly to the engineer/agent
using Visa, MasterCard or a cheque supported by a
banker’s card.
To Contact Us
England, Scotland, Wales and Northern Ireland
Mira Showers Customer Services
Te lephone: 0870 241 0888, Mon to Fri 8:00 am - 5:30 pm
Sat 8:30 am - 3:30 pm
E-mail: technical@mirashowers.com
Fax: 01242 282595
By Post: Cromwell Road, Cheltenham,
Gloucestershire, GL52 5EP
Eire
Modern Plant Ltd (Dublin)
Te lephone: 01 459 1344, Mon to Fri 9:00 am - 5:00 pm
E-mail: sales@modernplant.ie
Fax: Dublin 01 459 2329
Post: Otter House, Naas Road,
Clondalkin, Dublin 22
Modern Plant (Cork)
Te lephone: 021 496 8755, Mon to Fri 9:00 am - 5:00 pm
E-mail: cork@modernplant.ie
Fax: 021 496 8607
Post: Tramore Road, Cork
Mira is a registered trade mark of
Kohler Mira Limited.
The company reserves the right to alter
product specifi cations without notice.
www.mirashowers.com
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1084102-W2-A (B94E) (1663) © Kohler Mira Limited, October 2007
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