Mira CODA PRO Operation manual

1
These instructions must be left with the user.
Installation & User Guide
MIRA CODA PRO
CODA PRO
THERMOSTATIC BAR VALVE

2
CONTENTS
Introduction .............................................................................................3
Guarantee ............................................................................................4
Recommended Usage..........................................................................4
Design Registration:.............................................................................4
Patents: ................................................................................................ 4
Safety : Warnings ....................................................................................5
Pack Contents .........................................................................................6
Specications ..........................................................................................7
Pressures ............................................................................................. 7
Temperatures .......................................................................................7
Thermostatic Shut-down ......................................................................7
Connections .........................................................................................7
Dimensions ..............................................................................................9
Installation ...............................................................................................9
Suitable Plumbing Systems..................................................................9
Installation .......................................................................................... 11
Commissioning .....................................................................................14
Maximum Temperature Setting .......................................................... 14
Operation ...............................................................................................15
Adjusting the Temperature ................................................................. 15
Adjusting the Flow..............................................................................15
Maintenance...........................................................................................16
Fault Diagnosis...................................................................................16
Lubricants...........................................................................................17
Cleaning ............................................................................................. 17
Maintaining the Non-Return Valves....................................................17
Spare Parts ............................................................................................18
Customer Service..................................................................................20

3
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 Coda Pro thermostatic bar valve is a shower control designed for wall
mountd installations.
The thermostatic bar valve has two knobs, one knob controls the ow and the other
knob controls the temperature.
There is an ECO ow stop to encourage reduced water usage, which can be
overriden.
The thermostatic bar valve 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 supplied and must be tted to protect the thermostatic
cartridge.
The Mira Coda Pro is supplied complete with an easy, front of wall xing kit which
has been designed to make the installation of bar valves easier and more secure
and has the following benets over traditional ‘Z’ offset connectors:
• 2nd x installation after tiling has been completed
• Water connections are made in front of the nished wall surface
• Bar valve is secured to the wall
• Foam seal to prevent water ingress
• Suitable for any bar valve using 3/4” female threads
• Can be used on plastic barrier pipes (with suitable pipe insert)
If you experience any difculty with the installation or operation of your new
Thermostatic Mixer, please refer to ‘Fault Diagnosis’, before contacting Mira
Showers. Our contact details can be found on the back cover of this guide.

4
Guarantee
For domestic installations, Mira Showers guarantee the Mira Coda Pro 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 Coda Pro
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
Design Registration
GB 001225254-0003
Patents:
GB 2 407 138

5
SAFETY : WARNINGS
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.
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:
5.1. The young.
5.2. The elderly.
5.3. The inrm.
5.4. The disabled.
5.5. Anyone who suffers from a medical condition that can result in temporary
incapacity (e.g. epilepsy or blackouts).
5.6. Anyone inexperienced in the correct operation of the controls.
6. Children should be supervised to make sure that they do not play with the
appliance.
7. Care is required when adjusting ow or temperature, make sure that the
temperature has stabilised.
8. If pipework and/or electrical cables enter the shower from the rear through a
hole in the wall, provision must be made to prevent water ingress back into the
wall structure.
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.
10. Sunburn or skin conditions can increase your sensitivity to hot water. Make
sure that you set the shower to a cooler temperature.

6
PACK CONTENTS
Tick the appropriate boxes to familiarise yourself with the part names and to conrm
that the parts are included.
Documentation
q1 x Guarantee Registration Document
q1 x Mira Coda Bar Valve
Bar Valve Fixing Kit
q2 x Wall Plugs
q2 x Wall Brackets
q2 x Fixing Screws
q2 x Concealing Plates
q2 x Nuts
q2 x Filters
q1 x Plastic Pipe Guide
q1 x Pipe Guide

7
SPECIFICATIONS
Pressures
• Max Static Pressure: 10 Bar.
• Max Maintained Pressure: 5 Bar.
• Min Maintained Pressure: (Gas Water Heater): 1.0 Bar (for optimum
performance supplies should be nominally equal).
• Min Maintained Pressure (Gravity System): 0.1 Bar (0.1 bar = 1 Metre head
from cold tank base to shower handset outlet).
Temperatures
• Close temperature control is provided between 20°C and 50°C.
• Optimum Thermostatic Control Range: 35°C to 45°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 temperatures up to 85°C for short periods without damage. However for
safety reasons it is recommended that the maximum hot water temperature is
limited to 65°C).
• Minimum Recommended Differential between Hot Supply and Outlet
Temperature: 10°C at desired ow rates.
• Cold Water Range: up to 25°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
• Hot: Left (side nearest ow control), 15 mm compression.
• Cold: Right (side nearest temperature control), 15 mm compression.
• Outlet: Bottom, ½” BSP Male to exible hose.
Note! This product does not allow for reversed inlets and will deliver unstable
temperatures if tted incorrectly.

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Flow Rates
Pressure (Bar)
0.50 1.00 1.50 2.00 2.50 3.000.0 3.50 4.00 4.50 5.00
0.0
10.0
20.0
30.0
40.0
FLOW RATE
Mira Coda Pro Bar Valve: Handset
Handset
Eco-Flow
Coda Pro
with Handset
Flow Rate (l/min)
50.0
Handset Eco Flow
Coda Pro with Handset

9
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.
Gas Heated System:
The thermostatic mixer can be installed with a combination boiler.
Unvented Mains Pressure System:
The thermostatic mixer can be installed with an unvented, stored hot water
system.
Mains Pressurised Instantaneous Hot Water System:
The thermostatic mixer can be installed with systems of this type with balanced
pressures.
Pumped System:
The thermostatic mixer can be installed with an inlet pump (twin impeller). Refer to
Pump Installation and User Guide for more details.
Ø70 mm
150 mm
107 mm
290 mm 85 mm
DIMENSIONS

10
25 mm
Spill Over
Level
Soap Dish/Hose
Retaining Ring
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 ttings 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.
Note! Only use shower fittings
recommended by the manufacturer
or supplier.
7. All pipework must be checked for
leaks before the product installation
is completed. The product should
be pressurised and the inlet & outlet
connections inspected.

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1. Install the pipework making sure that it is level and set the correct distance apart
(150 mm) by using the supplied plastic pipe guide.
Important!
1.1 Pipes must be left a minimum of 50 mm long in front of the wall surface.
1.2 Connections are: Hot-Left, Cold-Right. This is very important as the
Mira Coda Pro does not allow for reversed inlets.
1.3 Pipes must be straight and at 90° to the nished wall surface.
2. Fit the plastic pipe guide over the inlet
pipes to hold them in position.
50 mm Minimum
150
Pipe Centres in Wall
HOT COLD
Plastic Pipe Guide
Inlet Pipes
Installation
3. Leave the plastic pipe guide in place
and nish the wall.

12
6. Drill the 2 holes for the wall brackets
with a 6 mm drill and insert the wall
plugs (some wall structures may require
alternative xings, not supplied).
Caution! Take care not to drill though
any concealed pipework.
7. Secure the wall brackets to the wall
with the xing screws supplied.
Caution! Make sure that you do not
push the pipe into the wall cavity.
Ø6 mm
25 mm
25 mm
4. Place the wall bracket over the inlet
pipes and mark the position of the 2
wall bracket xing holes.
Note! Consider the position of
concealed pipework.
5. Mark the pipe distance 25 ± 5 mm from
the nished wall.
8. Install the olives onto the inlet pipes
and tighten the nuts.
Wall Plug
Fixing Screw
Wall Bracket
Olive
Nut

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9. Caution! It is essential at this
point that the supply pipework is
thoroughly ushed through before
connection to the bar valve.
10. Install the concealing plates,and
tighten the concealing plates until
they are ush with the nished wall.
11. Make sure that the sealing washer/
lter is tted, offer the bar valve up
to the offset connectors and tighten
the nuts.
Caution! Take care not to damage
the chrome plated surfaces.
12. Install the shower ttings.
13. Turn on the hot and cold water
supplies and check for leaks.
14. Before using the shower, refer to
section: ‘Commissioning’.
Sealing Washer/Filter

14
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
sufcient supply.
Caution! Before testing the mixer, make sure that the hot and cold water is owing
correctly by exercising the temperature selector knob between the cold and hot
stops.
1. Turn the temperature selector knob to position 7 and test that the temperature
of the water from the shower outlet is hot enough.
2. If not, depress the override button and carefully rotate towards position 9. If the
water temperature is still not hot enough complete the following procedure.
3. Rotate the temperature selector knob back to position 7.
4. Using a suitable screwdriver carefully pry off the concealing cap and unscrew
the xing screw.
5. Pull off the temperature selector knob without disturbing the stop assembly.
6. Replace the temperature selector knob so that the 6 mark is in line with the
stop assembly.
7. Rotate the temperature selector knob to position 7 against the stop, wait for the
water to stabilise and test that the temperature of the water from the shower
outlet is hot enough.
If the water temperature is still not hot enough repeat the procedure until a
maximum safe temperature is achieved at position 9.
8. Ret and tighten the xing screw, ret the concealing cap.
Fixing Screw
Concealing Cap
Stop Assembly
Temperature
Selector Knob
Note! Ensure that
the number 6 mark is
in line with the stop
assembly.

15
OPERATION
Adjusting the Temperature
The temperature is controlled by rotating the temperature selector knob (see below).
For safety reasons, the temperature is limited by an override stop. To obtain a
higher temperature, press the override button on the temperature selector knob and
continue to rotate the knob.
Adjusting the Flow
The ow is controlled by rotating the ow selector knob (see below).
To reduce the amount of water used each time you shower, you can select the ECO
setting.
If you choose a higher ow rate, press the override button on the ow selector knob
and continue to turn the knob.
ON / Increase
Flow
Temperature
Override
Button
Temperature
Selector Knob
OFF / Decrease Flow
Flow Selector Knob
Decrease
Temperature
Increase
Temperature
Eco Setting
Flow Override Button
Eco

16
MAINTENANCE
Fault Diagnosis
If you require a Mira trained service engineer or agent, refer to section: ‘Customer
Services’.
Symptom Cause / Rectication
Water too hot or too
cold.
Inlets reversed (hot supply to cold supply). Rework inlet
pipework (refer to 'Specications').
Check the lters for any blockage (refer to 'Maintenance').
Maximum temperature setting ( refer to 'Commissioning' )
If you have a combination type boiler it may not be
producing sufciently hot water at desired ow rate
(refer to 'Specications'). Fit ow regulator to shower
valve outlet (contact Mira Showers or visit the website
if required).
Installation conditions outside operating parameters, refer
to sections: ‘Specications’ and ‘Commissioning’.
Poor temperature
control.
Make sure that the inlet temperature differentials are
sufcient, refer to section: ‘Specications’.
Fluctuating or reduced
ow.
Check the shower handset, hose and filters for any
blockage.
Set at Eco position. Press the override button and rotate
knob.
Make sure that the maintained inlet pressures are
nominally balanced and sufficient, refer to section:
‘Specications’.
Air lock or partial blockage in the pipework.
Water leaking from
shower handset.
Normal for a short period after shut off.
Check that the pressures are not in excess of the
specications for the product.
Thermostatic cartridge inlet seals damaged, renew.
Renew the ow cartridge.

17
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.
Maintaining the Non-Return Valves
Sealing Washer / Filter
Inlet Connector / Non-Return
Valve Housing
Non-Return Valve
The non-return valves are located in the thermostatic bar valve body, and are
accessible through the inlet connectors.
Caution! Make sure that the non-return valves are installed correctly to prevent
crossow or malfunction of the valve.
1. With the water supplies turned off and
the thermostatic bar valve removed,
remove the sealing washer / lter.
2. Unscrew the non-return valve housing
using a 12 mm hexagonal wrench.
Note! The non-return valve housing
has a Left Hand Thread, turn
clockwise to unscrew.
3. Carefully remove the non-return
valve and clean out any debris.
4. On re assembly make sure that the
non-return valve is tted the correct
way round (with the arrow indicating
the ow pointing towards the valve).
Filters
The sealing washers/lters are located in the inlet connector. Clean or renew as
necessary.

18
SPARE PARTS
1744.110
Temperature Stop
Assembly
1744.113
Temperature
Knob Assembly
1744.106
Outlet
Connector
1744.114
Flow Knob Assembly
1744.107
Flow Cartridge
1744.115
Fixing Kit
Assembly
1744.116
Concealing
Plate (x2)
1744.105
Valve Housing
(x2)
1744.103
Non-Return Valve and
Filter Washer (x2)
1744.104
Filter Washer (x2)
1744.108 Thermostatic
Cartridge
1744.109
Cartridge Nut
1744.117
Flow Stop

19
ACCESSORIES
Genuine Mira accessories can be purchased direct from Customers Services (our contact details can
be found on the back cover of this guide) or from approved stockists or merchants.
Eco Showerhead
White - 2.1668.001
Chrome - 2.1668.002
The Eco shower head gives
you an invigorating shower, but
reduces water consumption and
heating costs.
Everclear Showerhead
White - 2.1616.030
Chrome - 2.1616.031
Mira's new Everclear range has
been specially designed for hard
water areas and reduces the risk
of lime scale build up.
Wall Mounted Soap Dish
White - 1.1540.278
Chrome - 1.1540.279
Wall mounted for use anywhere
in, or outside the showering area.
Shower Seat
White - 2.1536.128
White/Chrome - 2.1536.129
For use in or out of the showering
area. Folds up when not in use.
Maximum User Weight - 127 kg
(20 stone) Note! Must be installed
onto a solid wall.
Premium Shower Seat
White/Chrome - 2.1731.001
Grey/Chrome - 2.1731.002
Stylish, slim-line and robust
shower seat for use in or outside
of the shower area. Folds up when
not in use. Maximum User Weight
- 150 kg (23.5 stone) Note! Must
be installed onto a solid wall.
Double Outlet Check Valve
(DCV-H)
Chrome - 1.0.110.55.1
An outlet double check valve,
designed to prevent the back ow
or back-siphonage of potentially
contaminated water, through
shower controls which are tted
with a exible shower hose as part
of the outlet shower tting.
Mira Bar Valve Fixing Elbows
Chrome - 2.1712.002
Designed to allow any bar valve
with 3/4” female connections to
be easily installed onto exposed,
rising or falling inlet supply
pipework.

20
Guarantee
Your product has the benefit of our manufacturer’s
guarantee which starts from the date of purchase.
To activate this guarantee, please return your completed
registration card, visit our website or free phone 0800
0731248 within 30 days of purchase (UK only).
Within the guarantee period we will resolve defects in
materials or workmanship, free of charge, by repairing or
replacing parts or product as we may choose.
If you have not previously activated the guarantee, you will
be required to do so prior to the provision of assistance.
If you do not activate your guarantee our Engineer will be
entitled to charge full payment for the visit (Call out fee
plus parts).
This guarantee is in addition to your statutory rights
and is subject to the following conditions:
● The product must be installed and maintained in
accordance with the instructions given in this user
guide.
● Servicing must only be undertaken by us or our
appointed representative. Note! if a service visit
is required the product must be fully installed and
connected to services.
● Repair under this guarantee does not extend the original
expiry date. The guarantee on any replacement parts
or product ends at the original expiry date.
● For shower fi ttings or consumable items we reserve
the right to supply replacement parts only.
The guarantee does not cover:
● Call out charges for non product faults (such as
damage or performance issues arising from incorrect
installation, improper use, lack of maintenance, build up
of limescale, frost damage, corrosion, system debris or
blocked fi lters) or where no fault has been found with
the product.
● Water or electrical supply, waste and isolation issues.
● Compensation for loss of use of the product or
consequential loss of any kind.
● Damage or defects caused if the product is repaired
or modifi ed by persons not authorised by us or our
appointed representative.
● Routine maintenance or replacement parts to comply
with the requirements of the TMV 2 or TMV 3 healthcare
schemes.
What to do if something goes wrong
If your product does not function correctly when you fi rst
use it, contact your installer to check that it is installed
and commissioned in accordance with the instructions in
this manual. Should this not resolve the issue, contact our
Customer Services Team who will offer you or your installer
advice and if applicable arrange for a Service Technician to
call. If the performance of your product declines, check in
this manual to see if simple home maintenance is required.
If you require further assistance call our Customer Services
Team.
Extended Guarantees
A selection of protection plans are available that
enable you to cover repair bills for the life of your policy
(excludes Eire). Ring 01922 471763 for more details.
Helpdesk Service
Our dedicated Customer Services Team is comprehensively
trained and can offer help and advice, spare parts,
accessories or a service visit. We will need you to have your
model name or number, power rating (if applicable) and date
of purchase. As part of our quality and training programme
calls may be recorded or monitored.
Mira Showers Website (www.mirashowers.co.uk)
From our website you can register your guarantee,
download additional user guides, diagnose faults, purchase
our full range of accessories and popular spares, refer to
our FAQ’s and request a service visit.
Spares and Accessories
We maintain extensive stocks of genuine spares and
accessories and aim to provide support throughout the
product’s expected life. Payment can be made by phone
at time of order using most major Credit or Debit cards and
we aim to despatch orders within two working days. Items
purchased from us are guaranteed for 12 months from date
of purchase. For safety reasons spares exposed to mains
voltages should only be fi tted by competent persons.
Returns – items can be returned within one month of date of
purchase, providing that they are in good condition and the
packaging is unopened. Please obtain authorisation from
our Customer Services Team before return. We reserve the
right to apply a 15% restocking charge.
Service / Repairs
We have a nationwide team of Service Technicians who can
carry out all service or repair work to your product within the
guarantee period and beyond. You have the assurance of a
fully trained Mira Te chnician, genuine Mira spare parts and
a 12 month guarantee on any chargeable work done.
Payment should be made directly to the Service Technician
who will accept most major Credit or Debit cards.
To Contact Us
UK
Telephone: [phone]
www.mirashowers.co.uk
E-mail: [email protected]
Fax: [phone]
By Post: Mira Customer Services Dept, Cromwell Road,
Cheltenham, Gloucestershire, GL52 5EP
Eire
Telephone: [phone]
E-mail: [email protected]
Fax: Dublin 01 459 2329
By Post: Modern Plant Ltd (Dublin),
Otter House, Naas Road, Clondalkin, Dublin 22
Mira is a registered trade mark of
Kohler Mira Limited.
The company reserves the right to alter
product specifi cations without notice.
1153818-W2-A (1744) (H04E) © Kohler Mira Limited, October 2010
CUSTOMER SERVICE