Mira Element Thermostatic Mixer User manual

1
MIRA ELEMENT
Installation and User Guide
THERMOSTATIC MIXER
These instructions must be left with the user.

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CONTENTS
Introduction .............................................................................................3
Guarantee ............................................................................................4
Recommended Usage..........................................................................4
Patents and Design Registration..........................................................4
Safety : Warnings ....................................................................................5
Pack Contents .........................................................................................6
Dimensions ..............................................................................................8
Specications ..........................................................................................9
Operating Parameters..........................................................................9
Installation Requirements .................................................................... 11
Installation .............................................................................................13
General...............................................................................................13
Installation Methods ...........................................................................14
Exposed Thermostatic Mixer ...............................................................15
1. Rear Entry Supplies (rising or falling concealed pipework)............ 15
2. Rising or Falling Supplies...............................................................17
Built-in Thermostatic Mixer ..................................................................19
1. Solid Wall or Stud Partition
(Using Securing Brackets - Mounting off Front Face of Wall) ....19
2. Solid Wall or Stud Partition
(Using Rear Fixing Points on the Thermostatic Mixer)............... 22
3. Laminated Panel
(Using Securing Brackets - Mounting on Rear Face of Wall)..... 24
Control Assembly (Built-in Models) ....................................................26
Reversed Inlet Supplies........................................................................27
Commissioning .....................................................................................29
Maximum Temperature Setting ..........................................................29
Operation ...............................................................................................30
Fault Diagnosis......................................................................................31
Maintenance...........................................................................................32
Type 2 Valves .........................................................................................36
Spare Parts ............................................................................................37
Accessories ...........................................................................................41
Customer Service....................................................................Back Page

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INTRODUCTION
If you experience any difculty with the installation or operation 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.
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 Element Thermostatic Mixer is a Thermostatic Shower Control with a single
control lever for on/off and temperature control.
There is no adjustable ow control. A 12 L/Min ow regulator is supplied for high
pressure systems to reduce excessive shower force.
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 Filters are tted to protect the thermostatic cartridge.
Mira Element Exposed: Thermostatic Mixer for connection to rising, falling or rear
entry pipework, supplied with L10 EV Shower Fittings.
Mira Element Built-in: Thermostatic Mixer for connection to concealed pipework,
supplied with L10 BIV or BIR Shower Fittings.
This product has been certied as a Type 2 valve under the BUILDCERT TMV2
scheme. This product also complies with the Water Supply (water ttings) Regulations
1999.

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Guarantee
For domestic installations, Mira Showers guarantee the Mira Element 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 Element 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 
Light Commercial 
Heavy Commercial 
Healthcare 
Patents and Design Registration
Design Registration: 000555768-0006, 000555768-0007
Patents: GB: 2 291 693, 2 392 225, 2 421 297
Germany: 695 13 455.8
France: 0 694 721 (E)
USA: 7 240 850
Patent Applications: GB: 0621637.8
Euro: 1 672 257, 03254070.0
USA: 2006-0124758-A1

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SAFETY : WARNINGS
This Mira Element Thermostatic Mixer is precision engineered and should give
continued safe and controlled performance, provided:
1. It is 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 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. 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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PACK CONTENTS
Tick the appropriate boxes to familiarize yourself with the part names and to
conrm that the parts are included.
1 x Mira Element Thermostatic Mixer
1 x ‘O’ Key
2 x Olives
2 x Compression
Nuts
2 x Concealing
Plates
1 x 2.5 mm
Hexagon Key
2 x No 8 x 1 ¼”
Securing Screws
2 x Wall Plugs
Documentation
1 x Guarantee Registration Document
1 x Installation Template
1 x 12 L/Min
Flow Regulator
Exposed Element Thermostatic Mixer

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Built-in Element Thermostatic Mixer
Documentation
1 x Guarantee Registration Document
1 x 2.5 mm
Hexagon Key 2 x No 8 x 1 ¼”
Screws
2 x Wall Plugs
1 x 12 L/Min
Flow Regulator
3 x Olives
3 x Compression
Nuts
1 x Mira Element Thermostatic Mixer
(attached to the Building-in Shroud)
1 x Control Assembly
2 x M5 x 40 mm
Screws
2 x Securing
Brackets
1 x ‘O’ Key
2 x Bracket
Securing Screws

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DIMENSIONS
153120
Ø70
35
Ø56
109
30
67 - 85
Building-in Depth
56 183
All dimensions in mm.
Exposed Element Thermostatic Mixer
Built-in Element Thermostatic Mixer
108

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SPECIFICATIONS
Operating Parameters
For Type 2 Valves, the supply conditions specied in section: ‘Type 2 Valves -
Application’ take precedence over the operating parameters which follow.
Pressures
Maximum Static Pressure: 10 Bar.
Maximum Maintained Pressure: 5 Bar.
Minimum Maintained Pressure (Gas Water Heater): 1.0 Bar.
(for optimum performance supplies should be nominally equal).
Minimum Maintained Pressure (Gravity System): 0.1 Bar.
(0.1 bar = 1 Metre head from base of cold tank to the outlet of the
shower handset).
Temperatures
Factory Pre-set (Blend) Shower: 43°C.
Optimum Thermostatic Control Range: 35°C - 45°C.
(Achieved with supplies of 15°C cold, 65°C hot and nominally equal
pressures).
Recommended Hot Supply: 60°C - 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
Exposed Mixer:
Inlets: 15 mm Compression, Hot - Left, Cold - Right.
Outlet: ½” BSP Flat Face, Bottom - Outlet.
Built-in Mixer:
Inlets: 15 mm Compression, Hot - Left, Cold - Right.
Outlet: 15 mm Compression, Top - Outlet.
If reversed inlets are required refer to section: ‘Reversed Inlet Supplies’.

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Flow Rates
Typical Flow Rates on Low Pressure Systems (0.1 Bar to 1 Bar) - Mira Element with
L10 Adjustable Fittings or Rigid Head:
Typical Flow Rates on High Pressure Systems (1 Bar to 5 Bar, with 12 Litre/Min
Flow Regulator tted in shower control outlet) - Mira Element with L10 Adjustable
Fittings or Rigid Head: