Kohler Mira ERD User manual

11393516-W2-A
Mira ERD Thermostatic Bar Valve
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ADVICE or REPAIRS
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Installation and User Guide
(Please keep these details safe as you will need them when registering your
product guarantee. Your guarantee information is included in this guide.)

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For domestic installations, Mira Showers guarantee the product 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 product against any
defect in materials or workmanship for a period of one year from the date of purchase.
Failure to follow the instructions provided with the shower will invalidate the
guarantee.
For Terms and Conditions refer to the 'Activating Your Free Guarantee and
Customer Service' pages.
Thank you for choosing a Mira shower. To enjoy the full potential of your new shower,
please take time to read this guide thoroughly, and keep it handy for future reference.
Products manufactured by Kohler Mira Ltd are designed to be safe, provided that
they are installed, used and maintained in good working order, in accordance with
our instructions and recommendations.
Follow all warnings, cautions and instructions contained in this guide, and on, or
inside the shower. This guide is also available in digital format from our website or
by contacting customer services.
Introduction
Guarantee
Type 2 Valves
This product has been certied as a Type 2 valve. It also complies with the Water
Supply (water ttings) regulations 1999. For further information on Type 2 Valves,
refer to the TMV2 Requirements Manual (available to view or download on our
website www.mirashowers.com). The approved designation for this product is
listed in the table below.
Mira Mixer Showers covered by this guide:
Product Code Model Number Colour Type 2 Designation
H06A
Mira Atom, Mira
Coda Pro, Mira
Reex, Mira Apt,
Mira Relate, Mira
React
Chrome HP-S
H06G Mira Assist Chrome HP-S

31393516-W2-A
1 x Bar Valve
OR
2 x Wall Brackets1 x Plastic Pipe Guide
2 x Concealing Plates 2 x Concealing Plates
2 x Compression Nuts2 x Olives
2 x Wall Plugs 2 x Fixing Screws
1 x Pair of Handles
Pack Contents
1 x Component Pack, Containing:
1 x Pair of Handles
1 x Pair of Handles
Note: Only 1 pair of handles and 1 pair of concealing plates are provided
and di󰀨er depending on product purchased.
Documentation
1 x Installation and User Guide
Guarantee Card (Back pages of Installation and User Guide)
1 x Pair of Handles
OR
OR
OR
2 x 6 l/min
Flow Regulator
Assist and React
Only

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1 x Riser Arm
1 x Overhead
1 x Middle Pipe
Hose Retaining
Ring
2 x Hose Washer
(Included with Hose)
1 x Handset
1 x Hose
1 x Clamp Bracket
1 x Lower Pipe
(Packed with Riser Arm)
1 x Shorter 135 mm
length pipe (available
from Mira Customer
Services)
1 x Mounting Bracket
1 x Concealing Cover
2 x Fixing Screws
1 x Grubscrew

51393516-W2-A
Dimensions
305 mm
150 mm
45 mm
1065 mm
105 mm
85 mm

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Design Registration: GB 001225254-0003
Patents: GB 2 407 138
Domestic 
Light Commercial 
Heavy Commercial 
Healthcare 
Design Registration and Patents
Recommended Usage
PLEASE OBSERVE THE FOLLOWING TO REDUCE THE RISK OF INJURY:
Installing the Shower
1. Installation of the shower must be carried out in accordance with these
instructions by qualied, competent personnel. Read all instructions before
installing the shower.
2. DO NOT install the shower where it may be exposed to freezing conditions.
Ensure that any pipework that could become frozen is properly insulated.
3. DO NOT perform any unspecied modications to the shower or its accessories.
When servicing only use genuine Kohler Mira replacement parts.
4. If the shower is dismantled during installation or servicing then, upon completion,
an inspection must be made to ensure all connections are tight and that there
are no leaks.
Safety Information
WARNING ! This shower can deliver scalding temperatures. For continued
safe operation, follow all instructions, warnings and cautions contained
in this guide and on or inside the shower. Periodic maintenance may be
required to keep the product in good working order.
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.

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Using the Shower
5. The shower must be operated and maintained in accordance with the
requirements of this guide. Make sure you fully understand how to operate
the shower before use, read all instructions and retain this guide for future
reference.
6. DO NOT switch the shower on if there is a possibility that the water in the shower
unit or ttings is frozen.
7. The shower can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervision or instruction concerning use
of the appliance in a safe way and understand the hazards involved. Children
must not be allowed to play with the shower.
8. Anyone who may have di󰀩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.
9. DO NOT allow children to clean or perform any user maintenance to the shower
unit without supervision.
10. Always check the water temperature is safe before entering the shower.
11. DO NOT adjust the temperature control rapidly while using the shower.
12. Use caution when altering the water temperature while in use, always check
the temperature before continuing to shower.
13. DO NOT switch the shower o󰀨 and back on while standing in the water ow.
14. DO NOT t any form of outlet ow control. Only Mira recommended outlet ttings
should be used.
15. The showerhead must be descaled regularly. Any blockage of the showerhead
or hose may a󰀨ect showering performance.
16. The water supplies to this product must be isolated if the product is not to be
used for a long period of time. If the product or pipework is at risk of freezing
during this period they should also be drained of water.
17. 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.

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• For safety and comfort the thermostat will shut o󰀨 the mixing valve within
2 Seconds if either supply fails (achieved only if the blend temperature has
a minimum di󰀨erential of 12°C from either supply temperature).
Thermostatic Shut-down
Temperatures
Close temperature control 20°C - 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
Minimum Hot Water Supply
Temperature
55°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
Di󰀨erential between Hot Supply
and Outlet Temperature
12°C at desired ow rates
Cold Water Range 1 - 25°C
Specications
Pressures
Maximum Static Pressure 1000 kPa (10 bar)
Maximum Maintained Pressure 500 kPa (5 bar)
Minimum Maintained Pressure
(Gas Water Heater)
100 kPa (1 bar)
(for optimum performance supplies should be
nominally equal)
Minimum Maintained Pressure
(Gravity System)
10 kPa (0.1 bar)
(0.1 bar = 1 Metre head from cold tank base to shower
handset outlet)
Plumbing Connections
Hot: Left 15mm pipework, 3/4" BSP to valve
Cold: Right 15mm pipework, 3/4" BSP to valve
Outlet: Bottom 1/2" BSP Male to exible hose

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Warning! This product does not allow for reversed inlets and will deliver
unstable temperatures if tted incorrectly.
Installation
General
1. Installation of the shower must be carried out in accordance with these
instructions by qualied, competent personnel.
2. The plumbing installation must comply with all national or local water regulations
and all relevant building regulations, or any particular regulation or practice
specied by the local water supply company.
3. Make sure all pressures and temperatures comply with the requirements of the
shower. See ‘Specications’. For Type 2 Valves, refer to supply conditions
given in the TMV2 Requirements Manual (this is available to view or
download from our website www.mirashowers.com).
4. Full bore/non restrictive servicing valves must be tted in a readily accessible
position adjacent to the shower to facilitate maintenance of the shower.
DO NOT use a valve with a loose washer plate (jumper) as this can lead to a
build up of static pressure.
5. DO NOT apply excessive force to plumbing connections; always provide
mechanical support when making plumbing connections. Any soldered joints
should be made before connecting the shower.
6. Pipework dead-legs should be kept to a minimum.
7. DO NOT install the shower unit in a position where access for maintenance is
restricted.
8. The shower must be tted to a waterproof, at and even wall surface. The
two screws and wall plugs supplied are suitable for most solid wall installations.
Alternative xing screws for panel structures are not supplied. Use both xing
points to secure the shower, be sure to use xings appropriate for the chosen
wall structure.
9. When pipework enters the product from the rear through a hole in the wall,
provision must be made to prevent water ingress back into the wall structure.
10. Position the shower unit where the controls are at a convenient height for the
user. Position the showerhead so that the water sprays in line with the bath or
across the opening of a shower cubicle. The installation must not cause the
shower hose to be kinked during normal use.
Suitable Plumbing Installations
The Thermostatic Mixer can be installed with all systems with balanced pressures.
Mixed gravity and mains supplies are not recommended.

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11. The water supplies to this product should be isolated if the product is not to be
used for a long period of time. If the product or pipework is at risk of freezing
during this period they should also be drained of water.
12. The position of the shower and shower ttings must provide a minimum air
gap of 25 mm between the showerhead and the spill over level of any bath,
shower tray or basin. There must be a minimum distance of 30 mm between
the showerhead and the spill over lever of any toilet, bidet or other appliance
with a Fluid Category 5 backow risk.
Zone of
Backflow
Risk
30 mm
Minimum
Toilet or Bidet
FC5
Hand Basin
FC3
Bath or Shower
Tray FC3
Shower
Unit
25 mm
Minimum
25 mm Minimum
Note : There will be occasions when the hose retaining ring will not provide a suitable
solution for Fluid Category 3 installations. In these instances an outlet double
checkvalve must be tted, this will increase the required supply pressure typically
by 10 kPa (0.1 bar). Double checkvalves tted in the inlet supply to the appliance
cause a pressure build up, which a󰀨ects the maximum static inlet pressure for the
appliance and must not be tted. For Fluid Category 5, double checkvalves are
not suitable.