Mira SILVER, Element Thermostatic Mixer User Manual
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MIRA SILVER
Installation and User Guide
THERMOSTATIC MIXER
These instructions must be left with the user.
For SPARES, ADVICE
or REPAIRS
Please call us on
0844 571 5000
(UK Only)
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CONTENTS
Introduction .............................................................................................3
Guarantee ............................................................................................4
Patents and Design Registration ..........................................................4
Safety : Warnings ....................................................................................5
Pack Contents .........................................................................................7
Dimensions .............................................................................................. 9
Specications ........................................................................................ 10
Operating Parameters ........................................................................ 10
Installation Requirements ....................................................................12
Installation .............................................................................................14
General ...............................................................................................14
Installation Methods ...........................................................................15
Exposed Thermostatic Mixer .............................................................. 16
1. Rear Entry Supplies (rising or falling concealed pipework) ............ 16
2. Rising or Falling Supplies ...............................................................18
Built-in Thermostatic Mixer ................................................................. 20
1. Solid Wall or Stud Partition
(Using Securing Brackets - Mounting on Front Face of Wall) ....20
2. Solid Wall or Stud Partition
(Using Rear Fixing Points on the Thermostatic Mixer) ...............23
3. Laminated Panel
(Using Securing Brackets - Mounting on Rear Face of Wall) ..... 25
Control Assembly (Built-in Models) .................................................... 27
Reversed Inlet Supplies ........................................................................ 28
Operation ...............................................................................................30
Commissioning .....................................................................................31
Maximum Temperature Setting .......................................................... 31
Fault Diagnosis ......................................................................................32
Maintenance ...........................................................................................33
General ...............................................................................................33
Spare Parts ............................................................................................36
Accessories ...........................................................................................38
Notes ......................................................................................................39
Customer Service .................................................................................. 40
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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 Silver 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 Silver Exposed: Thermostatic Mixer for connection to rising, falling or rear
entry pipework, supplied with L10 EV Shower Fittings.
Mira Silver Built-in: Thermostatic Mixer for connection to concealed pipework,
supplied with L10 BIV or BIR Shower Fittings.
Type 2 Valves
This product has been certied as a Type 2 valve under the BUILDCERT TMV2 scheme.
This product also complies with the Water Supply (water ttings) Regulations 1999.
Application
The approved designations for Type 2 Valves are as follows:
Model Designation
Mira Silver HP-S, LP-S
Important! The tting of any ow regulator will invalidate TMV2 compliance due to
the minimum ow rate requirements. Do not t ow regulators in TMV2 applications.
For Type 2 Valves refer to the TMV2 Requirements Manual.
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If you experience any difculty 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.
Guarantee
For domestic installations, Mira Showers guarantee the Mira Silver Thermostatic
Mixer against any defect in materials or workmanship for a period of ve years from
the date of purchase.
For non-domestic installations, Mira Showers guarantee the Mira Silver
Thermostatic Mixer against any defect in materials or workmanship for a period of
ve years from the date of purchase.
For terms and conditions refer to the back cover of this guide.
Recommended Usage
Application
Domestic
ü
Light Commercial
ü
Heavy Commercial
û
Healthcare
û
Patents and Design Registration
Design Registration: 000555768-008, 000555768-009
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 Silver 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
manufacturer’s recommendations.
2. Periodic attention is given, when necessary, to maintain the product in good
functional order.
3. Type 2 Valves are only used for applications covered by their approved
designations, refer to the TMV2 Requirements Manual.
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. 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.
6. Anyone who may have difculty understanding or operating the controls of any
shower should be attended whilst showering. Particular consideration should
be given to the young, the elderly, the inrm or anyone inexperienced in the
correct operation of the controls. This shower is not intended for use by persons
(including children) with reduced physical, sensory or mental capabilities, or
lack of experience and knowledge, unless they have been given supervision or
instruction concerning the use of the shower by a person responsible for their
safety.
7. Rapid/Excessive movement of the ow and/or temperature control levers may
result in momentary unstable blend temperatures.
8. Care is required when adjusting ow or temperature, make sure that the
temperature has stabilised. Sunburn or skin conditions can increase your
sensitivity to hot water.
9. Make sure that you fully understand how to operate this shower and make sure
that it is properly maintained in accordance with the instructions given in this
manual.
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10. The plumbing installation must comply with the requirements of UK Water
Regulations/Bye-laws (Scotland), Building Regulations or any particular
regulations and practices, specied by the local water supplier. The installation
should be carried out by a plumber or contractor who is registered or is
a member of an association such as:
i) Institute of Plumbing (IOP), throughout the UK.
ii) National Association of Plumbing, Heating and Mechanical Services
Contractors (NAPH & MSC), England and Wales.
iii) Scottish and Northern Ireland Plumbing Employers’ Federation
(SNIPEF), Scotland and Northern Ireland.
11. The shower head must be de-scaled regularly. Lack of regular shower head
cleaning will lead to poor performance and cause early failure of the product.
If necessary refer to the Shower Fittings User Guide for more information.
12. 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
conrm that the parts are included.
1 x Mira Silver 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”
Screws
2 x Wall Plugs
Documentation
1 x Guarantee Registration Document
1 x Installation Template
1 x TMV2 Requirements Manual
1 x 12 L/Min
Flow Regulator
Exposed Silver Thermostatic Mixer
1 x Cartridge
Removal Socket
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Built-in Silver Thermostatic Mixer
Documentation
1 x Guarantee Registration Document
1 x TMV2 Requirements Manual
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 Silver 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
153137
Ø70
35
Ø56
105
20
67 - 85
Building-in Depth
72 Ø183
108
All dimensions in mm.
Exposed Silver Thermostatic Mixer
Built-in Silver Thermostatic Mixer
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Operating Parameters
For Type 2 Valves, the supply conditions specied in the TMV2 Requirements Manual
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).
Note! For combination type boilers it may be necessary to t the ow regulator
(supplied) to restrict the ow through the boiler to ensure it produces a sufciently
hot water temperature.
Important! The tting of ow regulators will invalidate any TMV2 compliance due to the
minimum ow rate requirements. Do not t the ow regulator in TMV2 applications.
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’.
SPECIFICATIONS
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Flow Rates
Typical Flow Rates on Low Pressure Systems (0.1 Bar to 1 Bar) - Mira Silver 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 Silver with L10 Adjustable Fittings
or Rigid Head:
Flow Regulator Installation
Flow regulators are supplied with this product and should be tted in high pressure
systems to either;
1. Reduce Excessive Force & Flow Rate
2. Reduce Noise through the mixer due to high or unequal pressures
3. Stabilise incoming supply temperatures
Important! The tting of any ow regulator will invalidate TMV2 compliance due to
the minimum ow rate requirements. Do not t ow regulators in TMV2 applications.
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INSTALLATION REQUIREMENTS
Isolating Valve
Thermostatic Mixer
Overow Indicator
Pressure Reducing Valve
Float Valve
Twin Impeller Pump
Single Impeller Pump
Tempering Valve
Mini Expansion Vessel
Key to Symbols
The Mira Silver Thermostatic Mixer is compatible with the following systems:
Gravity fed system
The Thermostatic Mixer MUST be fed from
a cold water cistern and hot water cylinder
providing nominally equal pressure.
Gas heated system
The Thermostatic Mixer MUST be installed
with a gas water heater or combination
boiler of a fully modulating design.
Note! We recommend the use of a
12 L/Min Outlet Flow Regulator (supplied).
However, it is possible following the
installation of the Flow Regulator that the
ow rate is reduced too much for the boiler
to ignite. If this is the case remove the ow
regulator.
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