Kohler Mira Atom ERD Operation manual

11232447-W2-A
Mira Atom ERD
With Moxie
These instructions must be left with the user
Installation & User Guide
For SPARES, ADVICE
or REPAIRS
Please call us on
0844 571 5000
(UK Only)

2
1232447-W2-A
SAFETY : WARNINGS
WARNING - This product can deliver scalding temperatures if not operated, installed
or maintained in accordance with the instructions, warnings and cautions contained
in this guide.
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.
INTRODUCTION
For domestic installations, Mira Showers guarantee the Mira Atom against any defect in
materials or workmanship for a period of ve years from the date of purchase (shower ttings
and Moxie speaker for one year).
For non-domestic installations, Mira Showers guarantee the Mira Atom 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
Domestic 
Light Commercial 
Heavy Commercial 
Healthcare 
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.
GUARANTEE
DESIGN REGISTRATION AND PATENTS
Design Registration GB 001225254-0003
Patents: GB 2 407 138
RECOMMENDED USAGE

31232447-W2-A
WARNING - This product can deliver scalding temperatures if not operated, installed
or maintained in accordance with the instructions, warnings and cautions contained
in this guide.
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 and retain this guide for later use.
2. Installation must be carried out in accordance with these instructions, and must be
conducted by designated, qualied and competent personnel.
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. Make sure that you fully understand how to operate this shower before use, read all
operating instructions and retain this guide for future reference.
6. This product 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 product by a person
responsible for their safety.
7. Children should be supervised to ensure that they do not play with the product.
8. DO NOT perform any unspecied modications to the shower or its accessories. When
servicing only use genuine Kohler Mira replacement parts.
9. DO NOT t any form of outlet ow control. Only Mira recommended outlet ttings should
be used.
10. DO NOT operate the temperature control rapidly, allow 10 – 15 seconds for the
temperature to stabilise before use.
11. Care is required when adjusting ow or temperature, make sure that the temperature
has stabilised.
12. Care is required if the product is turned off and back on during showering as this may
result in unstable temperature. Ensure temperature has stabilised before re-using
product.
13. Sunburn or skin conditions can increase your sensitivity to hot water. Make sure that
you set the shower to a cooler temperature.
14. 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.
15. 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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1232447-W2-A
SPECIFICATIONS
Bar Valve Specication
18. This device is rated to IPX4.
19. Check local regulations for proper disposal.
20. DO NOT submerge the wireless speaker.
21. DO NOT spray water directly into the speaker.
22. The wireless speaker and battery are rated to operate in temperatures up to 140°F
(60°C). DO NOT expose to heat sources or install in any location where the temperature
may exceed 140°F (60°C).
23. DO NOT expose batteries to sunlight, re or other forms of excessive heat.
The BLUETOOTH®word mark and logos are registered trademarks owned by Bluetooth
SIG, Inc. and any use of such marks by Kohler Co. is under license. Other trademarks
and trade names are those of their respective owners.
CE Radiation Exposure Statement for Mobile Devices
This equipment complies with CE radiation exposure limits set forth for an uncontrolled
environment. This equipment should be installed and operated with a minimum distance
of 200 mm between the radiator and your body. The transmitter must not be co-located or
operating in conjunction with any other antenna or transmitter.
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 cold tank base to
shower handset outlet)
Connections
Hot - Left 1/2" BSP to pipework, 3/4" BSP to valve
Cold - Right 1/2" BSP to pipework, 3/4" BSP to valve
Outlet - Bottom 1/2" BSP Male to exible hose
Note! This product does not allow for reversed inlets and will deliver unstable temperatures if tted
incorrectly.
Thermostatic Shut-down
For safety and comfort the thermostat will shut off the mixing valve within 2 Seconds if either supply
fails (achieved only if the blend temperature has a minimum differential of 12°C from either supply
temperature).
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).
16. This wireless speaker complies with CE directives.
17. To play your personal music les, you need a wireless
BLUETOOTH® device.

51232447-W2-A
Operating Temperature 0°C - 60°C
Maximum Relative Humidity 100% condensing
USB Cable Length 1 m
Output Power 1.5 Watts into 4 Ohms
Total Harmonic Distortion <1% at 1 kHz full output power
BLUETOOTH®wireless range 10 m
Battery Charge Time 7 hours
Play Time* 7 hours
Charge Voltage USB 5 V
*Actual battery life will vary with use,settings and environmental conditions. Rechargeable batteries
have a limited number of charge cycles.
Recommended Hot Supply 0°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 Recommended Differential
between Hot Supply and Outlet
Temperature
12°C at desired ow rates.
Minimum hot water supply temperature 55°C.
Wireless Speaker Specication
INSTALLATION
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.
Suitable Plumbing Systems

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1232447-W2-A
1. The product must not be installed in an area where it may freeze. Pipework to the product
that could become frozen must be properly insulated.
2. Do not install the product in a position in which service access is restricted.
3. For stud partitions alternative xings may be required.
4. Isolating valves must be installed close to the product for ease of maintenance.
5. Pipework must be rigidly supported and avoid any strain on the connections.
6. Pipework dead-legs should be kept to a minimum.
7. If 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.
8. The position of the shower and shower ttings must provide a minimum gap of 25 mm
between the showerhead and the spill over level of any bath, shower tray or basin and
a minimum gap of 30 mm between the showerhead and the spill over level of any toilet,
bidet or other appliance with a Fluid Category 5 backow risk (see diagram).
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’.
Zone of
Backow Risk
Toilet or Bidet
FC5
Hand Basin
FC3
Bath or Shower
Tray FC3
Mixer Shower
25 mm
Minimum
25 mm
Minimum
9. The showerhead should be positioned
so that it discharges down the centre
line of the bath or across the opening
of a shower cubicle.
10. Only use the inlet connections supplied
with the product. DO NOT use any
other type of ttings.
11. All pipework must be checked for
leaks before the product installation
is completed. The product should
be pressurised & the inlet & outlet
connections inspected.
12. DO NOT overtighten connections,
screws or grubscrews as product
damage may occur.
13. Upon completion of installation, or if the
product is dismantled during installation
or servicing, then the product must be
inspected to ensure that there are no
leaks.
30 mm
Minimum
14. Having completed the installation, make sure that the user is familiar with the operation
of the product.

71232447-W2-A
Installation of the Bar Valve
Offset
Connector
Support Bracket
½" BSP Female
Connection
Apply Silicone
Sealant to seal
hole in wall
40 - 43 mm
The thermostatic bar valve should be installed where it will be supported by xed pipework.
1. Install the pipework, making sure that it is set at the correct distance apart (150 ± 24 mm)
and solidly xed.
2. Apply suitable thread sealant (not supplied) and attach the offset connectors to the
pipework in the wall. The offset connectors must protrude between 40 and 43 mm from
the nished wall.
Note! Connections are: Hot-Left, Cold-Right. This is very important as this product
does not allow for reversed inlets.
Tighten the offset connectors using a suitable
spanner. Make sure that the connectors are
level and set at the correct distance apart,
using the bar valve as a guide to spacing.
Caution! Make sure that the supply pipework
is ushed before installing the Bar Valve.
Assemble the bar valve with a sealing
washer/lter in each inlet and attach to the
offset connectors.
Note! Connections are: Hot-Left,Cold-Right.
Screw the concealing plates onto the offset
connectors until they come into contact with
the wall.
Spanner Flats
Tile
150 mm
Important! Before installing the pipework, please ensure that there is a minimum of
1065mm height clearance to allow for the rigid riser and overhead to be installed above.
If installing in a restricted height area, a shorter riser rail can be ordered as a spare part.
1 2
3 4

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1232447-W2-A
Installation of the Shower Fittings
1. Slide the hose retaining ring and the clamp bracket onto the middle bar, and then screw
the middle and lower bar sections together.
2. Screw the riser arm to the middle and lower bar section.
3. Push the riser bar into the top of the bar valve.
Note! The riser bar must be located correctly, push down rmly to seat it.
4. Insert the wall xing bracket into the riser arm mounting boss, then swivel the bar if
necessary to reposition the wall xing bracket against the wall.
Note! The grubscrew mounting hole must be positioned at the top.
5. Mark the holes for the wall xing bracket.
Note! Use a spirit level to ensure the bar is vertical.
6. Remove the wall xing bracket from the mounting boss then remove the riser bar from
the bar valve.
7. Drill two holes to suit the wall xings, ensuring that the bar valve is protected from debris.
Fix the bracket to the wall.
8. Ret the riser bar into the bar valve and then put the concealing cover onto the riser arm
mounting boss.
9. Push the riser arm mounting boss onto the wall xing bracket.
10. Fit and tighten the grubscrew (2.5 mm hexagonal key) into the hole on top of the mounting
boss then push the concealing cover over the wall xing bracket.
11. Tighten the grubscrew at the valve end and t the grubscrew cover.
12. Screw the xed shower head onto the riser arm. Make sure that the washer is tted.
Note! The Moxie wireless speaker does not have to be tted at this stage.
13. Fit the shower hose onto the bottom outlet of the bar valve.
Note! The shower hose has slightly different sized conical connections at each end (the
smaller diameter / longer length conical is identied with a Red protective cover or a
White label). The end with the red cover or white label connects to the showerhead, the
clear end connects to the valve.
14. Push the shower hose through the retaining ring and screw it to the showerhead.
15. Place the showerhead into the clamp bracket, adjusting the angle and height to the users
preference.

91232447-W2-A
Mounting
Boss
Wall Fixing
Bracket
Concealing
Cover
Riser
Arm
Riser Arm
Fixed
Showerhead
Middle Bar
Showerhead
Clamp Bracket
Hose Retaining Ring
Lower Bar
Hose
Valve Grub
Screw
Note! 'O' Seal
is located inside
Lower Bar
Wall Fixing Bracket
Grub Screw

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1232447-W2-A
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 anticlockwise until it stops 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 the knob further. If the water
temperature is still not hot enough complete the following procedure.
3. Rotate the temperature selector knob back to the override position.
4. Push in and rotate the concealing cap clockwise to remove. Remove the xing screw.
5. Pull off the temperature selector knob without disturbing the stop assembly.
6. Replace the temperature selector knob so that the lever is the 1 O'clock position.
7. Rotate the temperature selector knob against the stop, 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 the override position.
8. Ret and tighten the xing screw, ret the concealing cap.
Fixing Screw
Concealing Cap
Stop Assembly
Temperature
Selector Knob
Push in and
rotate to remove
Bar Valve Commissioning