Kohler Mira Select B14C User manual

11553346-W2-A
Mira Select
Thermostatic Mixing Valve
Installation and User Guide
For SPARES,
ADVICE or REPAIRS
please call us free
on 0800 001 4040
(UK only)

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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.
Type 2 and Type 3 Valves
This product has been certied for use in UK care premises as a Type 3 valve under the
BUILDCERT TMV3 scheme. This product has also been certied as a Type 2 valve under the
BUILDCERT TMV2 scheme. For care* installations refer to the TMV3 requirements manual. This
product also complies with the Water Supply (water ttings) Regulations 1999.
For further information on Type 2 or Type 3 Valves, refer to the TMV2 or TMV3 Requirements
Manual (available to view or download on our website www.mirashowers.com).
*Care applications are aged person facilities, residential care homes, etc. and any other
application where the user is similarly at risk. This product is not suitable for use in hospitals.
The approved designation for this product is listed in the table below. Mira Mixer Showers
covered by this guide:
Introduction
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.
Guarantee
6274070 - 6274084
Design Registration
Domestic Heavy Commercial 
Light Commercial Healthcare 
Recommended Usage
Product Code Model Number Colour Type 2 & 3 Designation
B14C Mira Select Valve Only
Satin Chrome HP-SB14C Mira Select Single Outlet
B14C Mira Select Flex

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Documentation:
q Warnings and Cautions Guide
q Quick Installation and User Guide
q Installation Template
Pack Contents
x1 q
x1 q
Mira Select Valve
Box 1
Box 2
Box 3
Component Pack
x2 q
x2 q
x2 q
x4 q
x4 q
x1 q
x1 q
x1 q
Mira Single Outlet Shower Fittings
x1 q
x2 q
x2 qx2 q
x2 qx2 q
x1 q

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Pack Contents
Mira Select Flex Shower Fittings
x1 q
x1 q
x1 q
x2 qx2 q
x1 q
x1 q
x1 q
Box 3 Box 4

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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 the 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.
5. The product may be TMV3 or TMV2 approved. Refer to the
installation guide for information regarding product type and
installation suitability.
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
6. The shower must be operated and maintained in accordance with
the requirements of the installation and user guides. Make sure
you read all this information fully and understand how to operate
the shower before use. Retain all guides for future reference.
7. DO NOT switch the shower on if there is a possibility that the water
in the shower unit or ttings is frozen.
8. The water supplies to this product must be isolated if the product
is not to be used for a period of time. For example, When away on
holiday. If the product or pipework is at risk of freezing during this
period, they should also be drained of water.
9. Persons (including children) with reduced physical, sensory, or
mental capabilities, or lack of experience and knowledge, can use
the shower if they are given supervision or instruction concerning
the use of the appliance by a person responsible for their safety.
10. 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.
11. DO NOT allow children to play with the shower, clean or perform
any user maintenance to the shower or it’s ttings e.g. Handset
and hose.
12. Always check the water temperature is safe before entering the
shower.
13. DO NOT adjust the temperature control rapidly while using the
shower.
14. DO NOT switch the shower o󰀨 and back on while standing in the
water ow. Use caution when altering the water temperature while
in use and always check the temperature before continuing to
shower.
15. DO NOT restrict the water ow from the shower outlet, temporarily
bending the shower hose or blocking the shower head while in use
could cause a hot shot of water to be discharged.

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16. When adjusting the handset mode, point handset away from
body and make sure the water temperature has stabilised before
continuing to shower.
17. The showerheads must be descaled regularly and hose checked
for blockage or damage. Blocked showerheads or hose will a󰀨ect
showering performance.
18. DO NOT connect the outlet of the shower to any tap, control
valve, trigger operated handset or showerhead other than those
specied for use with this shower. Only Kohler Mira recommended
accessories should be used.
19. For products with multiple shower outlets, the diverters or on/o󰀨
controls must be regularly operated to ensure the correct operation
of the outlet.
20. This appliance is intended to be permanently connected to the
water supplies and not connected by exible hoses.
If you are unsure about any of these Warnings & Cautions and require
further explanation contact Mira Customer Services.

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• Important! This product is not suitable to use with any other pipe sizes.
Thermostatic Shut-down
• 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).
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)
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 Tem-
perature
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
Plumbing Connections
Hot: Left 15 mm compression tting
Cold: Right 15 mm compression tting
Outlet: Single Outlet = 1/2" BSP Male to exible house

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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’.
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
buildup 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
four screws and wall plugs supplied are suitable for most solid wall installations.
Alternative xing screws for panel structures are not supplied. Use all four xing
points to secure the shower, be sure to use xings appropriate for the chosen
wall structure.
9. 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.
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.
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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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
25 mm
Minimum
25 mm Minimum
Mixer
Shower
Note: For safety, in case minimum air gaps are not achieved this product
is tted with double check valves.
In low pressure installation this will reduce ow.
The check valve in the handset can be removed to achieve improved ow.
However, if removed an alternative hose retaining ring is required. These
are available through Mira Customer Services.
For Fluid Category 5, double checkvalves are not suitable.