Mira Bijou Operation manual

1
INSTALLATION & USER GUIDE
These instructions must be left with the user.
THERMOSTATIC MIXERS
MIRA BIJOU AND MIRA ORDO

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 Bijou and Mira Ordo are thermostatic
mixing valves with a single control knob for on/off
and temperature control.
The Mira Bijou has a 300 mm clear glass storage
shelf and is supplied complete with Mira L14A
Shower Fittings.
The Mira Ordo has a 235 mm black glass storage
shelf and is supplied complete with Mira Energise
Shower Fittings.
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.
These products have been certied as Type 2
valves under the BUILDCERT TMV2 scheme.
These products also comply with the Water
Supply (water ttings) Regulations 1999.
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 contact details can be found on the back
cover of this guide.
CONTENTS
Introduction 2
Guarantee 3
Patents and Design Registration 3
Pack Contents 4
Safety Warnings 5
Specications 5
Pressures 5
Temperatures 5
Thermostatic Shut-down 5
Connections 5
Dimensions 6
Accessories 6
Installation 7
Suitable Plumbing Systems 7
General 7
Installing the Thermostatic Mixer 8
Commissioning 11
Maximum Temperature Setting 11
Operation 12
User Maintenance 13
Fault Diagnosis 13
Lubricants 13
Cleaning 13
In-service Tests 13
Type 2 Valves 14
Spare Parts 15
Customer Service Back Page

3
Guarantee
For domestic installations, Mira Showers
guarantee the Mira Bijou and Mira Ordo against
any defect in materials or workmanship for a
period of three years from the date of purchase
(shower ttings for one year).
For non-domestic installations, Mira Showers
guarantee the Mira Bijou and Mira Ordo 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.
Recommended Usage
Application Valve with
Fittings
Domestic ü
Light Commercial ü
Heavy Commercial û
Healthcare û
Patents and Design Registration
Patents:
GB: 2 291 693, 2 340 210, 2 392 225,
2 421 297
France: 0 694 721
Germany: 695 13 455.8
Euro: 1 672 257 DE, FR, GB, IT, NL, SE
USA: 7 240 850
Patent Applications:
Euro: 03254070.0
USA: 2006-0124758-A1, 2007-0221740-A1
Design Registration:
000882022-0001,0002

4
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
q1 x Mira Bijou or Mira Ordo
Thermostatic Mixing Valve
q1 x Glass Shelf
q1 x Fixing Bolt
q1 x Spacer
q1 x 4 mm Hexagonal Key
q1 M6 x 5 mm Grubscrew
q2 x Compression Nuts
q2 x Olives
q2 x Wall Plugs
q2 x Fixing Screws
q1 x 2.5 mm Hexagonal Key
q1 x ‘O’ Key
q1 x 12 L/Min Flow Regulator

5
SPECIFICATIONS
For Type 2 Valves, the supply conditions specied
in section: ‘Type 2 Valves - Application’ take
precedence over the operating parameters which
follow.
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) do not t the outlet
ow regulator.
For optimum performance supplies should be•
nominally equal.
Temperatures
Factory Pre-set (Blend) Shower: • 41°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.•
Standard connections are:• hot - left, cold -
right, outlet - bottom.
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 the
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 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 unstable blend temperatures.
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.

6
Dimensions
300 mm - Mira Bijou
235 mm - Mira Ordo
65 mm
17 mm
39 mm
113 mm
Ø54 mm
87 mm
10 mm
153 mm
Allow 100 mm
Minimum to Wall
Allow 100 mm
Minimum to Wall
Note! If you are retro-tting your mixing valve onto
existing pipework, an Adjustable Elbow Pack is
available if required, refer to section: ‘Accessories’.
See Note! below
ACCESSORIES
1663.012 Adjustable Elbow Pack:
This comprises extendable elbows and an
adjustable backplate. It is designed to allow the
mixing valve to be retro-fitted onto pipework
extending 15 mm to 19 mm from the nished
wall surface, and with pipe centres of between
133 mm and 153 mm.
Genuine Mira accessories can be purchased
direct from Customer Services (our contact details
can be found on the back cover of this guide) or
from approved stockists or merchants.
15 mm to 19 mm
133 mm to
153 mm

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’. For Type 2 Valves see also
supply conditions in section: ‘Type 2 Valves’.
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 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.
25 mm
Spill Over
Level

8
Installing the Thermostatic Mixer
1. The thermostatic mixer can be installed with
rear or rising 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.
Caution! Do not overtighten the grubscrews.
2. Use the installation template to mark the
positions of the holes for the backplate and
the pipe centres.
For rising supplies the pipe positions should
be set 39 mm from the centre of pipe to the
nished wall at 153 mm centres.
Note! If you are retro-tting your mixing valve
onto existing pipework, an Adjustable Elbow
Pack is available if required, 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
153 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.
23 mm from nished
wall surface
Elbow
Recess Ø19 mm
x 2 mm deep
23 mm
153 mm
HOT
COLD

9
6. Reversed Inlet Supplies Only:
a) Using a suitable tool, carefully remove the
plug cap from the centre of the sealing
plug to reveal keyway.
b) Remove the sealing plug using the ‘O’ key
(supplied) or a 12 mm hexagonal key.
c) 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) Remove the grubscrew using a 3 mm
hexagonal key (not supplied) and t in
the opposite side of the mixer body.
f) Rotate the mixer 180°.
g) The control knob will have to be realigned,
i.e. removed and turned through 180°, this
can be completed after commissioning.
Plug Cap
Sealing Plug
‘O’ Seal
Outlet Nipple
Grubscrew
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
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 and will not be covered under the
guarantee.

10
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 spacer and shelf onto the mixer. Use
a spirit level to make sure that the shelf is
level and tighten the xing bolt using a 4 mm
hexagonal key (supplied).
Caution! Do not overtighten.
Fixing Bolt
Spacer Shelf
16. Fit the shower ttings, refer to your shower
fittings installation and user guide for
instructions.
Note! For user comfort on high pressure
systems, a 12 litre/minute flow regulator
(supplied) can be tted inside the outlet nipple.
Make sure that the ow regulator is tted
correctly (refer to illustration).
Important! The tting of this ow regulator
will invalidate any TMV2 compliance due to
the minimum ow rate requirements, do not
t the ow regulator in these applications.
Flow Regulator
17.Turn on the hot and cold water supplies and
check for leaks.
18.Before using the shower, refer to section:
‘Commissioning’.

11
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
41°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.
For Type 2 installations the maximum blend
temperature is determined by the application,
refer to section: ‘Type 2 Valves - Application’.
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 knob grubscrew with the
2.5 mm hexagon key (supplied) and pull off
the control knob.
4. Unscrew the hub retaining screw with a
2.5 mm hexagon key.
Note! Do not remove the hub.
Control Knob
Hub
Hub Retaining
Screw
Grubscrew
+
-
Concealing Cap
2.5 mm Hexagonal Key
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. Rotate 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 the hub fully clockwise.
Note! Do not remove the hub.
8. Ret the hub retaining screw.
9. Ret the control knob with the grubscrew at
the bottom and retighten the grubscrew.
10.Ret the concealing cap.
11.Check that the shower temperature is
correct.

12
OPERATION
The Mira Bijou and Mira Ordo are thermostatic
mixing valves which have a single sequential
control knob for on/off and temperature control.
The control knob operates anti-clockwise in the
following sequence:
Off•
On•
Cold•
Warm•
Maximum Preset Temperature•
Maximum Preset
Temperature
Off

13
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).•
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showerhead,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 showerhead.•
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.
In-service Tests
The principal means for determining the continuing
satisfactory performance of the mixing valve is the
in-service test.
Follow the procedure detailed in the ow diagram
“In-service Test Procedure”.
Frequency of In-service Tests - Commercial
(non-domestic installations)
Check for correct blend setting every 6 months.
Follow the procedure detailed in the ow diagram
“In-service Test Procedure”, every 12 months.

14
TYPE 2 VALVES
Application
The approved designations for Type 2 Valves
are as follows:
Models Designation
Mira Bijou, Mira Ordo LP-S, HP-S
The permitted application details are:
Designation
Operating
Pressure
Range
Application
Mixed
Water
Temp†
LP-S Low
Pressure Shower 41°C Max
HP-S High
Pressure Shower 41°C Max
†Mixed water temperature at discharge point.
Important! For TMV2 installations the mixed
water temperature at the discharge point should
never exceed 46°C.
In order to achieve the safe water temperatures
expected of a Type 2 Valve it is essential that the
valve is used only for the applications covered by
its approved designations, with the appropriate
water supply pressures and temperatures, and
it is commissioned, maintained and serviced in
accordance with the recommendations contained
in this guide (refer to the section ‘Maintenance,
In-Service Tests’ for in service test frequency
that must be used as a minimum guide in Type 2
installations).
Supply Conditions
For applications where a Type 2 Valve is required,
the supply conditions must comply with the
values in the Table below. Note that both hot and
cold supply pressures must lie within the same
pressure range.
Operating Pressure
Range
High
Pressure
Low
Pressure
Maximum Static
Pressure (bar) 10 10
Maintained Pressure,
Hot and Cold (bar) 1 to 5 0.2 to 1
Hot Supply
Temperature (°C) 55 to 65 55 to 65
Cold Supply
Temperature (°C) ≤25 ≤25
Valves operating outside these conditions cannot
be guaranteed to operate as Type 2 Valves.
Start
Measure and record supply
temperature and pressures. Make sure
that they are within valve specications.
Measure and record blend
temperature (Tb) and ow rate.
Has ow rate fallen
signicantly or fallen
below minimum ow
specication?
Check and clean checkvalves,
strainers and outlet.
Measure and record blend
temperature (Tb) and ow rate.
Has ow rate
improved?
Carry out a performance check.
Refer to the commissioning
procedure.
Yes
No Yes
Has the blend
temperature
changed by more
than 2°C from the
previous recorded
value (Tb)?
Refer to section: ‘Fault
Diagnosis’.
Carry out the commissioning
procedure.
No
Yes
Finish
No
Note! All measurements and results should be
recorded in the Log Book.
Flow Diagram, In-service Test Program

15
SPARE PARTS
Note! All spare parts supplied individually unless
stated otherwise.
1663.159 Seal Pack - components identied ‘A’
1663.161 Component Pack (valve) - components
identied ‘B’ (also includes 2.5 mm
hexagonal Key)
1663.162 Screw Pack - components identied ‘C’
1663.234 Component Pack (shelf) - components
identied ‘D’
1663.168
Pipe Concealing
Plates (x2) 1663.154
Elbow Connector
Assembly
1663.158
Outlet Nipple
1663.160
Outlet Plug
1663.231
Elbow Assembly
1663.157
Backplate Assembly
1663.151
Hub and Bearing
Assembly
A
C
C
C
C
B,C
B
B
1663.155
Filter Pack (x2)
1663.232
Control Knob Assembly (Bijou)
1672.030
Control Knob Assembly (Ordo)
1663.152
Thermostatic
Cartridge Assembly
A
DC
1663.265
Flow Regulator
A
A
1663.233
Shelf Assembly (Bijou)
1672.031
Shelf Assembly (Ordo)
D
D

16
1
Guarantee of Quality
Mira Showers guarantee your product against any defect
in materials or workmanship, provided that it is installed
and maintained in accordance with the instructions given
in this guide.
To validate the guarantee, please return your completed
registration card within 30 days of product installation.
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 of the guarantee.
The guarantee on any exchanged parts or product ends
when the normal product guarantee period expires.
Not covered by this guarantee:
Planned maintenance, or replacement parts required to
comply with the servicing requirements of the TMV 2 and
TMV 3 healthcare schemes (where applicable).
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
modified 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, first 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 Team 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.
Genuine Mira spares can be purchased direct from
Customer Services or from approved stockists or merchants
(locations on request).
Spare parts will normally be despatched within two working
days. Payment can be made using most major Credit or
Debit cards 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 from 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 must only be fi tted by competent persons.
Service / Repairs
Our Service Force is available to provide a quality service
at a reasonable cost. You 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 who
will accept most major Credit or Debit cards or a cheque
supported by a banker’s card.
To Contact Us
England, Scotland, Wales and Northern Ireland
Mira Showers Customer Services
Telephone: [phone], Mon to Fri 8:00 am - 5:30 pm
Sat 8:30 am - 3:30 pm
E-mail: [email protected]
Fax: [phone]
By Post: Cromwell Road, Cheltenham,
Gloucestershire, GL52 5EP
Eire
Modern Plant Ltd (Dublin)
Telephone: [phone], Mon to Fri 9:00 am - 5:00 pm
E-mail: [email protected]
Fax: Dublin 01 459 2329
Post: Otter House, Naas Road,
Clondalkin, Dublin 22
Modern Plant (Cork)
Telephone: [phone], Mon to Fri 9:00 am - 5:00 pm
E-mail: [email protected]
Fax: [phone]
Post: Tramore Road, Cork
Mira is a registered trade mark of
Kohler Mira Limited.
The company reserves the right to alter
product specifications without notice.
www.mirashowers.com
5
+
!
3
CUSTOMER SERVICE
1091537-W2-C (1672) (B94G) © Kohler Mira Limited, July 2008