Mira Coda PRO ERD Operation manual

1
INSTALLATION & USER GUIDE
These instructions must be left with the user.
THERMOSTATIC BAR VALVE
MIRA CODA PRO ERD

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 Coda Pro ERD thermostatic bar valve
is a thermostatic shower control designed for wall
mount installations.
The thermostatic bar valve has two knobs, one
knob controls the ow and the other knob controls
the temperature.
The Mira Coda Pro ERD is supplied with a xed
showerhead, rigid riser and diverter assembly,
in addition to a single mode showerhead and
shower ttings kit.
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 tted to protect the thermostatic
cartridge.
Guarantee
For domestic installations, Mira Showers
guarantee the Mira Coda Pro ERD 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 ERD 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: 2 407 138
Design Registration: GB: 001225254-0003
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.
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 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.

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
q 1 x Guarantee Registration Document
q 2 x Wall Plugs
q 2 x Fixing Screws
q 1 x Securing Bracket
q 1 x Securing Bracket
Cover
q 1 x Pin
q 1 x Rigid Riser
Arm
q 1 x Mira Coda Pro
q 1 x Rigid Riser Rail
(supplied in 2 parts) q 1 x Fixed Showerhead
& Seal
q 1 x Diverter Assembly
(inc Nut, Olive & M4 x
5 mm Grubscrew)
q 1 x EV Fittings Kit
q 1 x 2 mm
Hexagonal Wrench
q 1 x Flow Regulator
(12 L/Min)
Bar Valve Fixing Kit
q 2 x Wall Plugs
q 2 x Wall Brackets
q 2 x Fixing Screws
q 2 x Concealing Plates
q 2 x Nuts & Olives
q 2 x Filters
q 1 x Plastic Pipe Guide

4
Dimensions
150 100 Min to Wall100 Min to Wall
Ø70
100
59
1000
145
340 80
190
Dimensions in mm
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 showerhead outlet).
Note! 0.25 Bar when running both outlets.
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 Differential between Hot Supply and
Outlet Temperature: 10°C.
• Cold Water Range: 5°C - 25°C.
Thermostatic Shut-down
• For safety the thermostat will shut off the
hot supply within 2 Seconds if the cold
supply fails (achieved only if the hot supply
temperature is greater than 10°C above the
set blend temperature).
Connections
• Hot: Left (side nearest ow control), 15 mm
compression.
• Cold: Right (side nearest temperature
control), 15 mm compression.
• Outlet: top, 15 mm compression from diverter.
Note! This product does not allow for reversed
inlets and will deliver unstable temperatures if
tted incorrectly.

5
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). The pump must
be installed on the oor next to the hot water
cylinder.
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 showerhead (refer to illustration).
This is to prevent back-siphonage.
Note! Only use shower ttings 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 & the inlet &
outlet connections inspected.
8. DO NOT overtighten grubscrews as product
damage may occur. Use hexagonal key
provided and hand tighten only, do not use
powertools.
25 mm
Spill Over
Level

6
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.
3. Leave the plastic pipe guide in place and nish
the wall.
50 mm Minimum
150
Pipe Centres in Wall
HOT COLD
Plastic Pipe Guide
Inlet Pipes
Installation

7
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.
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.
8. Install the olives onto the inlet pipes and tighten
the nuts.
Ø6 mm
25 mm
25 mm
Fixing Screw
Olive
Nut

8
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
fitted, 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 diverter and rigid riser assembly,
go to section: ‘Diverter and Rigid Riser
Assembly Installation’.
13.Install the shower ttings.
14.Turn on the hot and cold water supplies and
check for leaks.
15.Before using the shower, refer to section:
‘Commissioning’.
Sealing Washer/Filter

9
Diverter and Rigid Riser Assembly
Installation
1. Fit the diverter onto the mixer outlet and
tighten the M4 x 5 mm grubscrew with a 2 mm
hexagonal key (supplied)
Note! The diverter must be tted as illustrated,
with the diverter knob at the right and the outlet
at the back of the mixing valve.
2. Screw the rigid riser rail together then into the
rigid riser arm.
3. Locate the rigid riser rail into the diverter
outlet and the rigid riser arm into the securing
bracket, make sure that they are pushed fully
home.
Important! Align the rigid riser arm with the
securing bracket using the pin. Then, using a
spirit level make sure that the rigid riser rail
is vertical and mark the position of the xing
holes for the securing bracket on the wall.
Caution! Do not cut the rigid riser rail.
4. For solid walls drill the xing holes for the
securing bracket with a 6 mm drill and insert
the wall plugs (supplied). For other types
of wall structure alternative xings may be
required (not supplied).
5. Secure the securing bracket to the wall using
the screws (supplied).
Rigid Riser
Overhead Arm
Rigid Riser
Rail
Securing
Bracket Cover
Securing Bracket
Fixing Screws
Wall Plugs
Spirit Level
Pin

10
6. Slide the clamp bracket, hose retaining ring,
compression nut and olive onto the rigid riser
rail and locate into the diverter outlet.
7. Make sure that the securing bracket cover is
tted onto the rigid riser arm, then x the pipe
to the securing bracket with the pin. Screw
the securing bracket cover over the securing
bracket.
8. Tighten the compression nut using a suitable
spanner.
Note! Hold the diverter in position whilst
tightening the compression nut.
9. Fit the 12 L/Min ow regulator into the hose
then screw the hose onto the outlet of the
diverter, making sure that the hose seal is
tted.
10. Pass the flexible hose through the hose
retaining ring and screw the remaining end of
the hose onto the showerhead making sure
that the hose seal is tted.
11. Place the showerhead in the clamp bracket.
18.Make sure that the hose washer is tted and
screw the xed showerhead onto the rigid riser
arm.
12.Turn on the hot and cold water supplies and
check for leaks.
13.Before using the shower, refer to section:
‘Commissioning’.
Pin
Clamp Bracket
Compression Nut
Olive
Hose Seal
Hose
Securing Bracket
Securing Bracket
Cover
Hose Retaining
Ring
12 L/Min Flow
Regulator

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 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 prise
off the concealing cap and unscrew the xing
screw.
5. Pull off the temperature selector knob without
disturbing the stop assembly.
Fixing Screw
Concealing Cap
Temperature
Selector Knob
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, 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.
OPERATION
Adjusting the Temperature
The temperature is controlled by rotating the
temperature knob.
For safety reasons, the temperature is limited by
an override stop. To obtain a higher temperature,
press the override button on the temperature knob
and continue to rotate.
Decrease
Temperature
Adjusting the Flow
The ow is controlled by rotating the ow knob.
Operating the Divertor
The flow is switched between the fixed
showerhead, the showerhead and both together
by rotating the diverter knob.
Increase
Temperature
Temperature
Selector Knob
OFF/Decrease Flow
Eco
Eco Setting
ON/Increase
Flow

12
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).
Reworkinletpipework.
• Nohotorcoldwaterreachingthe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.
• Cartridgeinletsealsdamaged,renew.
• Renewthethermostaticcartridge.
Filters
The sealing washers / lters are located in the inlet
connector. Clean or renew as necessary.
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
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 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).
Non-Return Valve
Inlet Connector/
Non-Return Valve Housing
Sealing Washer/Filter

13
SPARE PARTS
Note! All spare parts are supplied
individually unless stated otherwise.
1744.114
Flow Handle Assembly
1744.107
Flow Cartridge
1744.118
Diverter Adaptor
1744.105
Non Return Valve
Housing (x2)
1744.115
Fixing Kit Assembly
1744.103
Non Return Valve and Filter
Washers (x2)
1744.104
Filter Washer
1744.113
Temperature
Handle Assembly
1744.110
Temperature Stop
Assembly
1744.108
Thermostatic Cartridge
1744.109
Cartridge Nut
1744.116
Concealing
Plate (x2)
1744.117
Flow Stop

14
1660.162
Fixing Pack
1663.289
Rigid Riser Arm
1660.161
Fixed Showerhead
1660.163
Rigid Riser Rail (1 Piece)
1660.289
Rigid Riser Rail (2 Piece)
1663.190
Showerhead
1660.172
Clamp Bracket
1595.073
Hose Retaining
Ring
1660.178
Compression Nut
& Olive
1660.165
Diverter Assembly
1603.104
Flexible Hose

15
ACCESSORIES
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.
Logic Showerhead Holder
White - 2.1605.149
White/Chrome - 2.1605.150
An alternative to the traditional
slide bar. Often a useful addition
when positioned for the smaller
members of the family.
Bar Valve Fixing Kit
Chrome - 2.1663.017
A  xing kit designed to make the
installation of bar valves easier
and more secure than traditional
'Z' connectors.
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.

16
CUSTOMER SERVICE
1178791-W2-B © Kohler Mira Limited, October 2011
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.
This guarantee is in addition to your statutory rights
and is subject to the following conditions:
● The guarantee applies solely to the original installation
under normal use and to the original purchaser only.
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.
● Accidental or wilful damage.
● Products purchased ex-showroom display.
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.
If this does not resolve the issue, contact our Customer
Services Team who will offer you or your installer help
and advice.
If you experience problems, 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 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 2 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. If you wish to return any items
please notify us in writing within seven days of receipt.
Service / Repairs
We have a nationwide team of Service Technicians can
carry out service or repair work to your product within the
guarantee period and beyond. You have the assurance of a
fully trained Technician, genuine 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]
E-mail - Visit www.mirashowers.co.uk/contactus
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. FM 14648