Kohler Mira Platinum Dual Installation Manual

Mira Platinum Dual

These instructions must be left with the user

Installation Guide

1

1199702-W2-H

CONTENTS

Introduction .............................................................................................3

Products Covered by this Guide...........................................................3

Guarantee ............................................................................................3

Patents and Design Registration .......................................................... 3

Safety Information ................................................................................... 4

Pack Contents .........................................................................................6

Specications .......................................................................................... 9

Standards and Approvals ..................................................................... 9

Dimensions ............................................................................................ 11

Installation .............................................................................................13

General Information ............................................................................13

Important Information Regarding Radio Controlled Devices .............. 13

Use of Flow Regulators with Combination Boilers ............................15

Installation Schematic ........................................................................19

Digital Mixer Valve: Position and Signal Test .....................................21

Shower Fittings - Ceiling Fed Slide Bar / Showerhead ......................24

Ceiling Fed Deluge Head ...................................... 27

Rear Fed Slide Bar / Showerhead ..........................30

Rear Fed Shower Arm and Deluge Head ...............34

Wireless Controller ............................................................................. 36

Commissioning .....................................................................................37

Connecting a Second Wireless Controller .......................................... 39

Re-Registering ....................................................................................... 40

Fault Diagnosis ......................................................................................41

Maintenance ...........................................................................................48

Spare Parts ............................................................................................49

Disposal and Recycling ........................................................................ 53

Notes ......................................................................................................54

Customer Service .....................................................................Back Page

If you experience any di󰀩culty with the installation or operation

of your new shower, then please refer to the Fault Diagnosis section,

before contacting Kohler Mira Ltd.

Our telephone and fax numbers can be found in the back of this guide.

1199702-W2-H

2

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 Platinum Dual Outlet Mixer Valve is designed to be used with the Mira

Platinum showerhead and ttings.

Products Covered by this Guide

Mira Platinum Dual Digital Mixer - High Pressure / Combi Valve

Mira Platinum Dual Digital Mixer - Pumped Valve.

Mira Platinum Dual Wireless Controller.

Mira 360 Fittings (Ceiling Fed or Rear Fed).

Guarantee

This product has been designed for domestic use only, it is not recommended for
Commercial or Healthcare use.

For domestic installations, Kohler Mira Limited, guarantee this product against any

defect in materials or workmanship for a period of ve years from the date of purchase
(shower ttings for one year).

Recommended Usage

Domestic

Light Commercial

Heavy Commercial

Healthcare







Patents and Design Registration

Design Registration 001065023-0003

Patents GB: 2 392 225, 2 421 297

USA: 7 240 850

Patent Applications

UK:

Euro: 03254070.0
USA: US-2007-0221740-A1
PCT/GB2008/004020
WO 2009/022112

0723827.2

0715612.8

0804172.5

3

1199702-W2-H

SAFETY INFORMATION

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 product. Failure to follow

the instructions provided with this product will invalidate the guarantee.

WARNING! TO REDUCE THE RISK OF FIRE, ELECTRIC SHOCK OR INJURY:

1. Installation of this product must be carried out in accordance with these

instructions by qualied, competent personnel. Read all instructions before
commencing installation.

2. The electrical installation must comply with BS 7671 (commonly referred to as
the IEE Wiring Regulations) and all relevant building regulations, or any particular

regulation or practice specied by the local electricity supply company.

3. 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.

4. Isolate the electrical and water supplies before commencing installation. Mains
connections are exposed when the valve module cover is removed.

5. The valve module must be earthed, ensure supplementary bonding is provided
in accordance with the wiring regulations.

6. This product must be permanently connected to a 3A fused connection unit and

be provided with means for disconnection incorporated in the xed wiring in

accordance with the wiring regulations.

7. We strongly recommend that a 30mA RCD is included in the electrical supply
to this product.

8. DO NOT install this product, user interface or the remote on/o󰀨 control in areas
with high humidity and temperature (i.e. steam rooms and saunas).

9. DO NOT install this product or ttings where they may be exposed to freezing

conditions. Ensure that any pipework that could become frozen is properly

insulated.

1199702-W2-H

4

10. DO NOT perform any unspecied modications, drill or cut holes in the product
other than instructed by this guide. When servicing only use genuine Kohler
Mira replacement parts.

11. If the product is dismantled during installation or servicing then, upon completion,
an inspection must be made to ensure all

12. DO NOT operate the product if water is leaking from inside the valve module.
Isolate electrical and water supplies to the product and refer to the fault diagnosis
section.

13. DO NOT apply power to the product if it is thought to have been exposed to

freezing conditions. Isolate electrical and water supplies to the product and

contact Kohler Mira Ltd.

14. Make sure that you fully understand how to operate the product and make sure
that it is properly maintained in accordance with the instructions given in this
manual.

15. This product 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 the use

of the product in a safe way and understand the hazards involved.

16. DO NOT allow children to play with the product.

17. DO NOT allow children to clean or perform any user maintenance without
supervision.

18. Always check the water temperature is safe before bathing or showering.

19. When installing the product to be used as a bath ller ensure the ow rate of the

bath overow tted exceeds the ow rate output from the product.

20. DO NOT remotely operate or alter any of this products shower and bathing
settings if it is already occupied and / or being used by another person.

5

1199702-W2-H

PACK CONTENTS

Tick the appropriate boxes to familiarise yourself with the part names and to conrm

that the parts are included.

Documentation

1 x Wireless Controller User Guide
1 x Showerhead User Guide
1 x Customer Support Brochure

Digital Mixer Valve

OR

Digital Mixer ­High Pressure / Combi Valve

1 x Orange Flow Regulator
( HP / Combi valve only)

1 x Green Flow Regulator
( HP / Combi valve only)

2 x Push-Fit Isolators

Wireless Controller

1 x Backplate

1 x Battery Cover

Digital Mixer - Pumped Valve

3 x Fixing Screws

3 x Wall Plugs

2 x Outlet
Connector

2 x Fixing Screws

2 x Wall Plugs

1 x Wireless
Controller

3 x AA Batteries

1199702-W2-H

6

Ceiling Fed Fittings

1 x Plastic Pipe

2 x Brackets

2 x Elbows

2 x Ceiling
Plate

1 x Deluge
Head

1 x Ceiling
Mount Plate

1 x Showerhead

2 x Spacers

1 x Hex Key

2 x 70 mm Screws

2 x 45 mm Screws

2 x Wall Plugs

2 x Hex Screws

1 x Slide Bar
Assembly

1 x Hose

7

2 x Extension

1 x Brazed

Pipe

1 x Ceiling Plate
Component Pack

2 x Rubber
Washers

1 x Installation Template
(not shown)

1199702-W2-H

Rear Fed Fittings

2 x Brackets

1 x Slide Bar
Assembly

1 x Concealing
Shroud

1 x Shower
Arm

1 x Showerhead

1 x Deluge Head

1 x Backplate
Assembly

1 x Right Angle
Connector (RAC) Kit

2 x Hex Screws
2 x Wall Plugs
2 x 45 mm Screws
1 x Hex Key

1199702-W2-H

2 x End Plugs

1 x Hose

1 x Fittings
Pack

2 x Rubber Washers

1 x Installation Template
(not shown)

8

SPECIFICATIONS

Standards and Approvals

The Mira Platinum Dual complies with all relevant directives for CE marking. The Mira
Platinum Dual is a type 1 electronic, independently mounted control for surface mounting.

The Mira Platinum Dual is in compliance with the essential requirements of the
R&TTE directive 1999/5/EC. A copy of the declaration of conformity may be obtained
by contacting Kohler Mira Limited, U.K customer services department.

General

Pollution Degree 2

Rated Impulse Voltage 2.5 kV

Suitable for Drinking Not Suitable

Connections 15 mm Compression / Pusht

Mira Digital Mixer Valve High Pressure (Not suitable for Pumped
Gravity Systems)

Pressures

Maximum Static Pressure 1000 kPa (10 bar) = 100 m max. total head

Maximum Maintained Pressure 500 kPa (5 bar) = 50 m max. total head

Minimum Maintained Pressure 100 kPa (1.0 bar) = 10 m min. total head

Supply Pressure Di󰀨erential Nominally Equal

Temperatures

Maximum Temperature (factory preset) 45 °C

Maximum Temperature (setting range) 38 °C - 48 °C

Minimum Temperature Thermostatic control down to 30 °C

Hot Water Range 55 °C - 65 °C

Cold Water Range 1 °C - 20 °C

Temperature Stability ± 1 °C at recommended supply conditions

Ambient Temperature 1 °C - 40 °C

Maximum Relative Humidity 95% non-condensing

Flow Rates and Times

Nominal Flow Rates (will vary depending
on inlet maintained pressure and spray
mode)

Electrical

Supply Voltage 230V AC 50 Hz

Maximum Load 20 W

Max @ 1.0 bar = 16l/min
Min @ 1.0 bar = 5l/min

9

1199702-W2-H

Mira Digital Mixer Valve Pumped

Pressures

Maximum Static Pressure 100 kPa (1 bar) = 10 m max. total head

Maximum Maintained Pressure 100 kPa (1 bar) = 10 m max. total head

Minimum Maintained Pressure 1 kPa (0.01 bar) = 0.1 m min. total head

Supply Pressure Di󰀨erential Nominally Equal

Temperatures

Maximum Temperature (factory preset) 45 °C

Maximum Temperature (settable range) 38 °C - 48 °C

Minimum Temperature Thermostatic control down to 30 °C

Full Cold also selectable

Hot Water Range 55°C - 65°C

Cold Water Range 1°C - 20°C

Temperature Stability ± 1°C at recommended supply conditions

Ambient Temperature 1°C - 40°C

Maximum Relative Humidity 95% non-condensing at 30 °C

Flow Rates and Times

Flow Rates (will vary depending on inlet
maintained pressure and spray mode)

Electrical

Supply Voltage 230V AC 50 Hz

Maximum Load 200 W at 230V AC

Max @ 0.01 bar = 16 l/min
Min @ 0.01 bar = 6 l/min

1199702-W2-H

10

Digital Mixer Valve

DIMENSIONS

68 mm

35 mm

85 mm

60 mm

315 mm

239 mm

ISOLATE MAINS ELECTRICITY BEFORE

FOR HIGH PRESSURE / COMBINATION BOILER

PART No. 1796.011

N85K

MANUFACTURED DATE:

POWER: 230V ~ 20W
PROTECTION: IP24
MIN. SUPPLY PRESSURE: 50 kPa (0.5 bar)
MAX. WORKING PRESSURE: 500 kPa (5 bar)
MAX. STATIC PRESSURE: 1000 kPa (10 bar) (WRAS)
MAX. SUPPLY WATER TEMP: 65 °C

MOUNTING POSITION

KOHLER MIRA LTD.
CHELTENHAM
GL52 5EP
TEL: [phone]

www.mirashowers.co.uk

F14319/1

394 mm

REMOVING COVER!

DUAL OUTLET
DIGITAL MIXER

VERTICAL HORIZONTAL

HOT COLD

60 mm

ISOLATE MAINS ELECTRICITY BEFORE

REMOVING COVER!

FOR LOW PRESSURE SYSTEMS

PART No. 1796.010
N85L
MANUFACTURED DATE:

POWER: 230V ~ 200W
PROTECTION: IP24
MIN. SUPPLY HEAD: 0.1 m (0.01 bar)
MAX. WORKING HEAD: 10 m (1 bar)
MAX. SUPPLY WATER TEMP: 65 °C

MOUNTING POSITION

KOHLER MIRA LTD.
CHELTENHAM
GL52 5EP
TEL: [phone]

www.mirashowers.co.uk

F14318/1

HOT COLD

OR

DUAL OUTLET
DIGITAL MIXER

OR

VERTICAL HORIZONTAL

46 mm

205 mm

242 mm

234 mm

289 mm

44 mm

Shower Fittings - Fixed Head Arm

420 mm

130 mm

11

46 mm

315 mm

250 mm

1199702-W2-H

Shower Fittings - Slide Bar and Showerhead

150 mm

62 mm

645 mm
Maximum
to ceiling

650 mm

82 mm

Shower Fittings - Ceiling Fed Arm

51 mm

600 mm

60 mm Minimum
600 mm Maximum

1199702-W2-H

250 mm

12

INSTALLATION

General Information

The product may be installed in a loft space, under the bath or in a convenient
cupboard space, provided there is enough room for maintenance (e.g. Removal
of the product lid). Failure to do so may result in an inability to carry out any
maintenance.

Safe and easy access to the product should be available at all times.

When installing the product in an area not regularly accessed, consideration
for potential leaks must be taken into account. While such events are unlikely,
it is advisable to periodically check the installation for traces of water on or
around the product.

If possible, site the product in a location where any leak would be contained
or routed to avoid areas sensitive to water damage.

Inlet isolating valves (supplied) must be installed.

We strongly recommend that full bore outlet isolation valves are tted as close to

the product as possible for ease of service and maintenance.

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.

Important Information Regarding Radio Controlled Devices

• Metal objects such as steel baths or sinks, cold water storage tanks, hot water

cylinders, foil lined plaster board walls, radiators and even thick brick walls, can
all dramatically reduce the radio operational range of any radio controlled product.

• Interference from other radio signals can dramatically reduce the ability of the

Platinum Wireless Controller / digital mixer to register or communicate. This may
include; mobile phones, radio control boiler thermostats, wireless broadband
routers, radio control toys, cordless phones, remote outdoor weather stations,
wireless doorbells etc.

• If you encounter di󰀩culty registering the wireless controller and digital mixer

ensure all other radio interference is temporarily switched o󰀨.

Note! Failure to follow these guidelines can result in poor, intermittent or complete
failure to communicate with the digital mixer.

Note! Both the Wireless Controller and Digital Mixer contain internal radio
transmission aerials which are directional in operation. In order to achieve optimum
radio signal strength and therefore optimum communication distance It may be
necessary to alter the Wireless Controller and Digital Mixer relative orientation /
position to each other.

13

1199702-W2-H

Typical Suitable Installations:

Outlet 2 (warm)

1. Instantaneous Multipoint Water Heaters and Combination Boilers

Caution! Risk of product damage. Do not t the Mira Digital Mixer - PUMPED

VALVE with Instantaneous Multipoint Water Heaters or Combination Boilers.

Combination
Boiler

Cold

Hot

Outlet 1 (warm)

Digital Mixer
Valve (HP)

ISOLATE MAINS ELECTRICITY BEFORE

REMOVING COVER!
DUAL OUTLET
DIGITAL MIXER

FOR HIGH PRESSURE / COMBINATION BOILER

PART No. 1796.011
N85K

MANUFACTURED DATE:

POWER: 230V ~ 20W
PROTECTION: IP24
MIN. SUPPLY PRESSURE: 50 kPa (0.5 bar)
MAX. WORKING PRESSURE: 500 kPa (5 bar)
MAX. STATIC PRESSURE: 1000 kPa (10 bar) (WRAS)
MAX. SUPPLY WATER TEMP: 65 °C

MOUNTING POSITION

OR

VERTICAL HORIZONTAL

KOHLER MIRA LTD.
CHELTENHAM
GL52 5EP
TEL: [phone]

www.mirashowers.co.uk

F14319/1

HOT COLD

Mira Platinum
Shower Fittings

Deluge Head

Key to Symbols

Float
Valve

Isolating
Valve

Pressure Reducing
Valve

Tempering
Valve

Overow

Indicator

Mini Expansion
Vessel

COLD HOT

Only install the High Pressure Digital Mixer Valve with a multipoint gas water heater
or combination boiler of a fully modulating design (i.e. where the water draw-o󰀨

rate indirectly controls the gas ow rate to the burner).

An expansion vessel must be tted (and regularly maintained) if any form of backow
prevention device is tted, e.g. non-return valve or PRV. This will ensure that excess

expansion or pulse pressures do not damage the product or plumbing system. The

expansion vessel may already be tted within the boiler (check with the manufacturer)

and is in addition to the normally larger central heating expansion vessel.

1199702-W2-H

14

Use of Flow Regulators with Combination Boilers

The Mira Digital Mixer Valve can demand hot water quicker than some instantaneous
water heaters/combination boilers can provide, especially in winter when the mains

water is colder. A Hot inlet ow regulator may need to be used to ensure that the

Digital Mixer Valve can deliver a full range of water temperatures.

Note:

The Mira Single outlet digital mixing valves are factory tted with an 8 l/min hot
inlet ow regulator. If installing a single outlet digital mixer with a combi boiler rated
36kW or greater or to mains pressurised systems the hot inlet ow regulator should

be removed.

Note:

The Mira Dual outlet digital mixing valves do not have a factory tted hot inlet ow
regulator. These are supplied in the component pack. The table indicates which

ow regulator should be tted in the hot water inlet of the Mira Digital Mixer Valve if

installing to a combination boiler system.

Boiler Rating 24 kW (80,000 Btu/h) 30 kW (100,000 Btu/h) 36 kW (120,000 Btu/h)
Flow Regulator 7 litres/min 9 litres/min Not required
Colour White/Green White/Orange -

Dual outlet valve shown

Green

Orange

Unscrew hot inlet plastic nuts and remove pipe and seal to gain access to the

checkvalve cartridge and lter.

Use at blade screwdriver to carefully lever cartridge out.

Fit/remove the ow regulator from checkvalve cartridge behind lter as required.

Ret seal, pipe and plastic nut. Plastic nuts require hand tightening only.

15

1199702-W2-H

Outlet 2 (warm)

Use of Warm-up Feature with Combination Boilers

When using the warm-up feature (see User Guide) with the digital mixer valve supplied
via an instantaneous water heater/combination boiler, the user may experience a

brief temperature uctuation. This is caused by the normal operation of a standard
instantaneous water heater/combination boiler whereby the boiler will turn o󰀨 when
the ow is stopped (as happens after the warm-up sequence has been completed).
Upon restart of the shower, a cold shot will be ushed through followed by a brief

hot shot until the hot water supply has stabilised.

2. Mains Pressurised Instantaneous Hot Water Shower, Heated

from a Thermal Store

Caution! Risk of product damage. Do not t the Mira Digital Mixer - PUMPED

VALVE with Mains Pressurised Systems.

Dual Outlet Digital
Mixer Valve (HP)

Outlet 1 (warm)

ISOLATE MAINS ELECTRICITY BEFORE

REMOVING COVER!

DUAL OUTLET
DIGITAL MIXER

FOR HIGH PRESSURE / COMBINATION BOILER

PART No. 1796.011

N85K

MANUFACTURED DATE:

POWER: 230V ~ 20W
PROTECTION: IP24
MIN. SUPPLY PRESSURE: 50 kPa (0.5 bar)
MAX. WORKING PRESSURE: 500 kPa (5 bar)
MAX. STATIC PRESSURE: 1000 kPa (10 bar) (WRAS)
MAX. SUPPLY WATER TEMP: 65 °C

MOUNTING POSITION

OR

VERTICAL HORIZONTAL

KOHLER MIRA LTD.
CHELTENHAM
GL52 5EP
TEL: [phone]

www.mirashowers.co.uk

F14319/1

HOT COLD

Deluge Head

Mira Platinum
Shower Fittings

Hot

Cold

HOT

COLD

Packages of this type, tted with a tempering valve can be used. A drop type pressure
reducing valve must be tted (and regularly maintained) if any form of backow
prevention device is tted, e.g. non-return valve, PRV, then an expansion vessel
should also be tted. This will ensure that excess expansion or pulse pressures do

not damage the product or the plumbing system. The expansion vessel may already

be tted externally or internally within the thermal store (check with thermal store

manufacturer).

1199702-W2-H

16

3. Gravity Fed Showers

Caution! Risk of product damage. Do not t the Mira Digital Mixer - HIGH

PRESSURE / COMBI VALVE with Gravity Fed Systems.

ISOLATE MAINS ELECTRICITY BEFORE

REMOVING COVER!

Dual Outlet Digital

DUAL OUTLET
DIGITAL MIXER

FOR LOW PRESSURE SYSTEMS

PART No. 1796.010
N85L

MANUFACTURED DATE:

POWER: 230V ~ 200W
PROTECTION: IP24
MIN. SUPPLY HEAD: 0.1 m (0.01 bar)
MAX. WORKING HEAD: 10 m (1 bar)
MAX. SUPPLY WATER TEMP: 65 °C

OR

MOUNTING POSITION

VERTICAL HORIZONTAL

KOHLER MIRA LTD.
CHELTENHAM
GL52 5EP

Mixer Valve (Pumped)

TEL: [phone]

www.mirashowers.co.uk

F14318/1

HOT COLD

100 mm from the lowest
level of water in the tank

warm

Deluge Head

Mira Platinum
Shower Fittings

Cistern
Minimum
230 litres

1.0 metre

minimum

hot

cold

F9001

KOHLER MIRA LTD.

CHELTENHAM

GL52 5EP

TEL: [phone]

www.mirashowers.com

HOT COLD

coldcold

hot

30° - 60°
Air Separation

ISOLATE MAINS ELECTRICITY BEFORE

MIRA DM2 WIRELESS

HP/COMBI

1666.009

N85A

MANUFACTURED

POWER: 230 V AC 20 W

PROTECTION: IP24

MIN. SUPPLY PRESSURE: 50 kPa (0.5 bar)

MAX. WORKING PRESSURE: 500 kPa (5 bar)

MAX. STATIC PRESSURE: 1000 kPa (10 bar) (WRAS)

MAX. SUPPLY WATER TEMP: 65 °C

POSITION APPLIANCE OR

DIGITAL MIXER 2 WIRELESS

REMOVING COVER!

The shower control must be fed from a cold water storage cistern and a hot water
cylinder providing nominally equal pressures. Pipework layouts and connections
must be such that other draw-o󰀨s will not e󰀨ect water supplies to the shower, shared

supplies may lead to airlocking or water starvation. It is therefore best practice to have
independent hot and cold supplies to the Low Pressure (pumped) Digital Mixer Valve.

17

1199702-W2-H

Typical Examples of Poor Plumbing and Installation Practices
DO NOT:

• Install the Digital Mixer Valve where it can become frozen

• Install the Digital Mixer Valve where it can be subjected to ambient tempera-

tures in excess of 40ºC.

• Position the Digital Mixer Valve where maintenance access is poor or unsafe

• Install into a system where the cold water cistern holds less than 230 litres

• Install into a system where air locking could occur

• Install the wireless controller in a position where communication with the

Digital Mixer Valve is poor e.g. mixer valve installed under metal bath, in front
of metal cistern, on foil backed plasterboard, more than the recommended
distance away etc.

• Install the Digital Mixer Valve onto shared water supplies

• Install the Digital Mixer Valve less than 100 mm from the lowest level of water

in the cistern (low pressure version only)

• Fit plastic pipework unless rigidly supported

• Install a High Pressure/Combi Valve to a Pumped Gravity System

Incorrect

Less than
230 Litres

Incorrect

Hot

Take-off

Cold

Take-off

Affected by Metal
Bath / Poor or no

Communication

1

2

Bath Installation

Less than
230 Litres

1199702-W2-H

Incorrect

Cold

Take-off

Shared

Supplies

Plastic pipework

not rigidly
supported.

Incorrect

Hot

Take-off

Air-locking
Pipework

Distance Too Far /

Poor or No

Communication

18

No

Access

1

2

Steel / Cast

Bath

Shower Installation

Installation Schematic

Digital Mixer

Valve

Isolators

Metal pipework must be

earth bonded

Cold Inlet

Hot Inlet

Dual Outlets

To Mains

Power Supply

3 amp switched

fused spur.

Easily Accessible

A separate, permanently connected supply must be taken from the ring main
to the appliance through a 3 amp double pole switched fuse spur providing a
minimum 3mm contact separation gap in each pole.

Ensure the switched fused spur is easily accessible for servicable and resetting
purposes.

The use of supply-line or zone strainers will reduce the need to remove debris

at the Digital Mixer Valve. The recommended maximum mesh aperture
dimension for such strainers is 0.5 mm.

Pipework must be rigidly supported to avoid any strain on the connections.

A 30 mA Residual Current Device (RCD) must be included in the electrical
circuit. This may be part of the consumer unit or a separate unit.

19

1199702-W2-H

Long inlet pipework (dead-legs) should be kept to a minimum to avoid temperature

uctuations.

Supply pipework layout must be arranged to minimize the e󰀨ect of other outlet

usage upon the dynamic pressures at the Digital Mixer Valve inlets.

To eliminate pipe debris it is essential that supply pipes are thoroughly ushed

through before connection to the Digital Mixer Valve.

Valve Installation Orientation

Inlets

Outlets

Outlets

Inlets

Mounting on a Vertical Surface

Mounting on a Horizontal Surface

The Digital Mixer Valve (which contains the thermostatic mixing valve) may
only be orientated in the positions shown above when mounted on a vertical

or horizontal surface. Failure to do so will compromise the ability of the unit to

fail-safe and deliver constant blend.

If the supply cords are damaged, they must be replaced by the manufacturer
or a service engineer.

Warning! Turn o󰀨 the electrical and water supplies before proceeding with
the installation of the appliance. The electricity must be turned o󰀨 at the

mains and the appropriate circuit fuse electrically isolated, if applicable.

1199702-W2-H

20

Digital Mixer Valve

Position and Signal Test

ISOLATE MAINS ELECTRICITY BEFORE

REMOVING COVER!
DUAL OUTLET
DIGITAL MIXER

FOR HIGH PRESSURE / COMBINATION BOILER

PART No. 1796.011
N85K
MANUFACTURED DATE:

POWER: 230V ~ 20W
PROTECTION: IP24
MIN. SUPPLY PRESSURE: 50 kPa (0.5 bar)
MAX. WORKING PRESSURE: 500 kPa (5 bar)
MAX. STATIC PRESSURE: 1000 kPa (10 bar) (WRAS)
MAX. SUPPLY WATER TEMP: 65 °C

MOUNTING POSITION

KOHLER MIRA LTD.
CHELTENHAM
GL52 5EP
TEL: [phone]

www.mirashowers.co.uk

F14319/1

HOT COLD

OR

VERTICAL HORIZONTAL

3 amp switched
fused spur.
Easily accesible

Cold Water Inlet

Valve Outlets

Hot Water Inlet

Ceiling Fed
Shower Fittings

Ceiling Fed
Deluge head

10 m

(Free air)

1

2

Wireless

Controller

Rear Fed
Fitting

Important! When choosing a position for the Digital Mixer Valve in relation to the
Wireless Controller and the Shower Fittings, consider the following points:

The Wireless Controller can be sited up to 10 m (free air) from the Digital Mixer

Valve. However, wall thicknesses and construction types may a󰀨ect the remote

signal strength and thereby reduce the range. The Controller range should be
tested on site prior to installation to ensure shower’s reliability.
Refer to Section - INSTALLATION “Important Information Regarding Radio

Controlled Devices”.

Note! Both the Wireless Controller and Digital Mixer contain internal radio

transmission aerials which are directional in operation. In order to achieve
optimum radio signal strength and therefore optimum communication distance
It may be necessary to alter the Wireless Controller and Digital Mixer relative
orientation /position to each other.

The length of pipework running from the Digital Mixer Valve to the Shower Fitting

will have an e󰀨ect on the showering temperature and the response time when

changing the temperature using the Wireless Controller. The shorter the length
of pipework from the Digital Mixer Valve the better the shower will respond. It
is recommended that this length does not exceed 5m from the valve outlet to

shower tting.

21

1199702-W2-H

The ambient temperature of Digital Mixer Valve site (loft space, airing cupboard

etc...) can have an e󰀨ect on showering temperature. Insulate all pipework as

required, particularly from the Digital Mixer Valve to the Shower Fitting.

The temperature indicated on the wireless controller display is measured
inside the digital mixing valve and due to site conditions is not necessarily the
temperature delivered at the shower outlet.

Fit 3 x AA batteries (supplied) into the wireless controller.

Depending on the type and version of your wireless controller, the

software revision number (eg. r04) may be briey displayed, the

controller will then display its default time of 10:00.

Place wireless controller in approximate nal

position (no more than 10 m (free air) from
digital mixer valve) and test wireless signal by
pressing either “1” or “2”, and adjusting the
temperature. If temperature display remains
unchanged and “out of range” symbol is
displayed, units are unable to communicate
with each other.

A sluggish response to button presses
indicates poor radio communication without
the out of range symbol being displayed.

If test fails, reposition unit(s) and

repeat test until satised shower will

work reliably.

Caution! Risk of product damage. Do not run Pumped Valve (low pressure
version) without a water supply for longer than 5 minutes during test.

Isolate electrical supply to
Digital Mixer Valve.

Mark the xing holes in the required positions.

Fixing Screw x 3

1199702-W2-H

22

Drill and plug the xing holes.

Note! Installers may wish to use alternative cavity xings, when installing onto

a dry lined, stud partition, shower cubicle or laminated panel wall structures.

However, these methods of xing are beyond the scope of this guide.

Secure the Digital Mixer Valve in position with the xing screws (supplied).

Caution! Risk of product damage. Make sure both hot and cold supply

pipes are ushed thoroughly prior to connection to the Digital Mixer Valve.

Any product malfunction caused by pipework debris is not covered under
the guarantee.

Connect the hot and cold water supply pipes to the Digital Mixer Valve as
indicated on the product lid.

Wiring to an easily accessible
Switched Fused Spur Box

Cold Inlet

Push-t Isolators tted

to both Inlets

Push-t connector to the

Shower Fittings

Outlets

Hot Inlet

Install the Shower Fittings and Wireless Controller (see further instructions).

23

1199702-W2-H

Shower Fittings - Ceiling Fed

Suitable for solid, dry-lined, stud partition, shower cubicle or laminated panel walls.

The Slide Bar should be xed to the wall at a convenient height for all the family.

It should be positioned so that water sprays down the centre of the bath, or away
from the opening of a shower cubicle. Water should spray away from the Wireless
Controller when the Showerhead is held on the Slide Bar.

Decide on suitable position for Slide
Bar avoiding buried cables and pipes in
both wall and ceiling. Make sure slide

bar extension will t through ceiling.

Ceiling hole centre can be altered to
avoid roof joists by using supplied
spacers.

Using template as guide, mark

positions of the xing holes for Wall

Brackets (600 mm). Upper hole to be
no more than 645 mm from ceiling.

645 mm

Max.

600 mm

Optional
spacers
(supplied)

Note! Use spirit level to make sure

xing holes are vertical.

Fold long end of template and move
up to ceiling. Using upper marked

xing hole as guide, mark centre for

hole in ceiling.

Important! If supplied Slide Bar
spacers are required, centre
distance for hole will increase to
75 mm from wall.

Cut hole in ceiling 29 mm diameter.

1199702-W2-H

24

Drill and plug Slide Bar Assembly

xing holes.

Insert xing screws through holes
in Wall Brackets and x to wall. Do

not fully tighten. Use template to
set correct distances between Wall
Brackets. Fully tighten screws. Use

longer xing screws if using spacers

supplied.

Note! Slots in Wall Brackets allow for

adjustment. Use one horizontal slot

and one vertical slot.
Make sure that holes for Slide Bar
Securing Screws are positioned
correctly, as shown.

Fit ceiling plate and extension tube.

Note! Extension tube may need to
be shortened, use a hacksaw to
shorten tube. Make sure rough end
is concealed in ceiling.

25

1199702-W2-H

Fit Slide Bar Assembly over Wall
Brackets and secure with screws
supplied. (Do not overtighten.)

Connect ceiling extension tube.

Feed plastic pipe up through the slide
bar and extension into ceiling.
Do not allow any debris to block the
plastic pipe.

Note! If plastic pipe requires shortening,

make sure there is enough length to t

elbow (supplied) or alternative push-

t/compression tting (not supplied).

When shortening for use with any

push-t (e.g. John Guest) tting, follow
manufacturer’s guidelines for nishing

and cleaning the pipe.

Push and twist plastic pipe end until
it “clicks” and locks in place.

Connect plastic pipe in ceiling to outlet
pipe from valve using elbow supplied.
Push all parts together fully.

Connect elbow to Digital Mixer Valve.
Fit an isolating valve between to
enable easy maintenance. (Pipe and
isolating valve not supplied). Lock pipe
to elbow using clip supplied. Follow

manufacturer’s guidelines for tting
alternative push-t connections and
exible pipework.

1199702-W2-H

26

Place rst washer in end of hose,
then attach to pipe end. Do not t

showerhead until after pipework has

been fully ushed through. See section

“Commissioning”.

Ceiling Fed Deluge Head

The Deluge Head should be xed to the ceiling at a convenient height for all the

family. It should be positioned so that water sprays down over the centre of the bath,
or away from the opening of a shower cubicle.

The tting of the Deluge Head into the ceiling will be easier with the aid of a helper.

When you are working within the bath or shower tray area use a towel or blanket to
protect the surface from damage.

Decide on a suitable position for the
Deluge Head avoiding cables and
pipes hidden between joists or rafters.
Note! A timber noggin or plywood

plinth securely xed to the joist should

be used to mount the Deluge Head.

Drill a 29 mm hole through the ceiling
and the wooden support. Ensure the
two holes drilled are directly in line or
the ceiling pipework will be at an angle.

Push the Brazed Pipe through the

Ceiling Mount Plate then push the

threaded end of the brazed pipe down

through the holes made in the ceiling.

Timber noggin or
plywood plinth

Drill 29 mm
Hole

Drill holes
in line!

Ceiling Mount
Plate

Brazed

Pipe

Threaded end

27

1199702-W2-H

Centralise the brazed pipe in the hole

then screw the ceiling mount plate to
the wooden support.

O󰀨er the deluge head to the brazed

pipe and determine the showering

height required. Push / pull the brazed

pipe using a twisting motion to adjust
the height. Check the height is correct
and use a 15 mm pipe cutter to cut the
pipe to the desired length. Note! Cut

the brazed pipe at least 30 mm above

the ceiling mount plate to allow room

to t the olive, nut and elbow.

Secure the brazed pipe to the ceiling

mount plate with the olive and 1/2”
BSP nut. Note! This is not a water

tight connection, tighten su󰀩ciently

to clamp the pipe in place.

O󰀨er the Chrome Extension Tube to
the brazed pipe and determine the

length required to allow the tube to

conceal the brazed pipe and protrude

into the ceiling space a minimum of 15
mm. Use a pipe cutter to cut the tube to
the desired length. Remove all burrs.
Note! Take care not to crush the pipe
when cutting.

75 mm

Determine
the showering
height

1/2” BSP Nut

Olive

Brazed

Pipe

Minimum
15 mm

Chrome
Extension
Tube

1199702-W2-H

28

Push the cut end of the chrome
extension tube into the Concealing
Plate then slide the extension tube

over the threaded end of the brazed

pipe and up through the hole until the
concealing plate is secured in the hole

and the concealing plate is at against

the ceiling.
Note! If the hole in the ceiling is

oversize use silicone sealant on the

underside of the concealing plate to
retain it.

Connect brazed pipe in ceiling to

outlet pipe from digital mixing valve
using elbow supplied. Push all parts
together fully.

Connect elbow to digital mixer valve.
Fit an isolating valve between to
enable easy maintenance. (Pipe and
isolating valve not supplied). Lock pipe
to elbow using clip supplied. Follow

manufacturers guidelines for tting
alternative push-t connections and
exible pipework.

Cealing
Plate

Threaded
end of pipe

Do not t deluge head until after
pipework has been fully ushed through.

Refer to section “Commissioning” in
Digital Mixer Valve Installation guide.

Screw the deluge head onto the brazed

pipe outlet by hand. Note! Use two

suitably sized wrenches to fully tighten

(approximately 1/4 turn).

Slide the extension tube down to

conceal the brazed pipe.

29

Deluge
Head

1199702-W2-H

Shower Fittings - Rear Fed

Suitable for solid, dry-lined, stud partition, shower cubicle or laminated panel walls.

The Slide Bar should be xed to the wall at a convenient height for all the family.

It should be positioned so that water sprays down the centre of the bath, or away
from the opening of a shower cubicle. Water should spray away from the Wireless
Controller when the Showerhead is held on the Slide Bar.

Decide on suitable position for Slide
Bar avoiding buried cables and pipes
in wall.

Using template as guide, mark

positions of the xing holes for Wall

Brackets (600 mm).

Note! Use spirit level to make sure

xing holes are vertical.

600 mm

Drill and plug xing holes.

1199702-W2-H

30

Insert xing screws through holes in
Wall Brackets and x to wall. Do not

fully tighten at this stage. Use template
to set correct distances between Wall
Brackets. Fully tighten screws.

Note! Slots in Wall Brackets allow for

adjustment. Use one horizontal slot

and one vertical slot.
Make sure that holes for Slide Bar
Securing Screws are positioned
correctly, as shown.

Position Slide Bar over Wall Brackets
and secure with screws. (Do not
overtighten.)

Fit Slide Bar End Caps into top and
bottom of Slide Bar Assembly. Push
and twist caps until they “click” and
lock in place.

31

1199702-W2-H

Fit an isolating valve (not supplied)

29 - 33 mm

90°

close to the Digital Mixer Valve for
ease of maintenance.

Make sure that the outlet pipe work
protrudes approx. 60 mm through a

Dia 20 mm hole square to the nish

wall surface.
NOTE! To be trimmed after completion

of nished wall surface when installing

RAC.

Finish the surface of the wall as
required.

Trim the pipework back to the

required depth from the nished wall

surface. Remove all burrs and sharp
edges.

Disassemble the right angle connector
assembly and mark the locations of

the screw xings.

60mm

Drill the xing holes. (7 mm diameter

for screws supplied.)
DO NOT drill through the backplate

into the wall.
DO NOT drill into buried cables or

pipes.

1199702-W2-H

32

Secure the backplate to the wall so the
foam seal is fully compressed.

Fit the pipe collar and lock. Re-check
the pipe length.

Foam Seal

29 - 33 mm

Flush pipework to clear all debris.

33

1 min

1199702-W2-H

Fit the o seal and elbow.

Check for leaks.

o seal

Fit the cover. Carefully lift the cover to
locate the screw. Unscrew fully to lock
using the 2.5 mm hex key supplied.

1199702-W2-H

34

Rear Fed Shower Arm and Deluge Head

The Shower Arm and Deluge Head should be tted at a convenient height for all

the family. It should be positioned so that water sprays down over the centre of the
bath, or away from the opening of a shower cubicle.

The outlet pipe must protrude 18 mm

(± 2 mm) from the nished wall surface

and a minimum 35 mm from the ceiling.
Note! Cut the pipe to the correct length
and remove any burrs.

Fit an isolating valve (not supplied)
close to the Digital Mixer Valve for
ease of maintenance.

Mark the positions of the backplate

xing holes.

Caution! Be aware of hidden pipes
or cables

For solid walls drill the xing holes for

the backplate with a 6 mm drill and
insert the wall plugs (supplied). For
other types of wall structure alternative

xings may be required (not supplied).
Caution! Take care not to drill into

hidden pipes or cables.

Carefully t the backplate over the
outlet pipe and secure with the xing

screws (supplied).
Caution! Take care not to damage the
‘O’ Seal in the back of the backplate.

35

Minimum Distance to
Ceiling 35 mm

18 ± 2 mm

1199702-W2-H

Fit the olive and compression nipple
over the outlet pipe and tighten the
compression nipple.

Fit the concealing shroud onto the
shower arm.

Fit the compression nut and olive onto
the shower arm.

Fit the shower arm into the compression
nipple and tighten the compression
nut.

Hand tighten the concealing shroud
onto the backplate.

Concealing
Shroud

Olive

Backplate

Compression Nipple

Olive

Compression
Nut

Shower
Arm

Do not t deluge head until after
pipework has been fully ushed through.

Refer to section “Commissioning” in
the Dual Outlet Installation Guide.

Screw the deluge head onto the
shower arm by hand.

Note! Use a suitably sized wrench to

fully tighten (approximately 1/4 turn).

Caution! The shower arm is not
designed to take weight, therefore care
needs to be taken when installing the
deluge head.

1199702-W2-H

Flow Regulator
(some models)

36

Shower Arm

Deluge Head

Wireless Controller

Suitable for solid, dry-lined, stud partition, shower cubicle or laminated panel walls.

The Wireless Controller should be xed to the wall at a convenient height for all

the family. It should be positioned so that water does not spray over it when the
Showerhead is held on the Slide Bar.

Important! Make sure wireless signal has been tested between Wireless

Controller and Digital Mixer Valve before permanently xing to wall. See section

‘INSTALLATION - Digital Mixer Valve: Position and Signal Test’.

Mark position for backplate holes.

Mount backplate on at surface (e.g.

Centre of tile).
Drill and plug holes.

Caution! Avoid drilling through
buried cables or pipes.

Make sure surface is clean and dry.

Fix backplate to nished wall surface.

Turn controller over and remove
the battery cover by loosening the 4

screws with a pozi drive screwdriver.

Note! The screws remain attached
to the battery lid.

Only t new batteries of same make

and type. Do not use rechargeable
batteries. Replace all three batteries
at the same time.

Secure battery cover.

Hook Controller on top of backplate
and push firmly until Controller
“clicks” back into place.

37

1199702-W2-H

1 2

COMMISSIONING

1 2

Turn on electrical supply to Digital Mixer Valve.

Make sure the end of the hose is in
either the bath, shower tray or other
water catchment area.
Note! The overhead mounting

will ow water when switched on

(“

” or “2”) depending on the outlet

plumbing conguration.

Press “

” button and reduce

temperature to full cold “CLd”.

Turn ow clockwise to full. For

Low Pressure (pumped) version,
let shower run in order to prime
the pump. For long pipe runs, allow
3 - 4 minutes for priming.

Caution! Risk of product damage.
Do not run Pumped Valve (low
pressure version) without a water
supply for longer than 5 minutes
during priming.

1199702-W2-H

38

Run cold water through (approximately
2 minutes) and check entire installation
for water leaks. Press “1” to turn shower

o󰀨. Fit the second hose washer and

showerhead.

Press “1” to turn shower on. Test
operation of shower by increasing/

decreasing both temperature and ow

controls. (See User Guide for full details.)

Test operation of showerhead spray
modes. (See Showerhead User Guide for
full details.)

Repeat process for outlet 2 by pressing
“2” button.

Refer to User Guide for further instructions on how to use the shower.

The Wireless Controller factory default settings are as follows:
Maximum Showering Temperature = 45°C

Eco Mode = O󰀨
Warm-Up Mode = O󰀨

Clock = 10:00 (when batteries connected)
Clock Display = On

Shower Duration = O󰀨
Bath Fill Mode = O󰀨

Note! If the display reads 4:00 when the batteries are connected the
wireless controller will require registering, refer to the initial registration

process in section “Digital Mixer Valve: Position and Signal Test”.

Run the shower and adjust the maximum shower temperature to suit user
requirement.

Eco, warm-up and clock display can also be altered to suit, refer to wireless
controller guide.

39

1199702-W2-H

CONNECTING A SECOND WIRELESS CONTROLLER

The following procedure details how to assign the Wireless Controller to the Digital
Mixer Valve and test the remote signal strength.

Note! Other radio signals from sources such as mobile phones, radio controlled
boiler thermostats, wireless broadband etc. can dramatically reduce the ability of
the digital mixer valve to register.

It is recommended that such items are switched o󰀨 during this process.

Isolate electrical supply to the digital mixer valve.

Bring the wireless controller to within approximately 1 m of the digital mixer
valve. Fit the three AA batteries supplied into the wireless controller.

Ensure the wireless controller LCD lights up then switch on power to the digital
mixer valve.

Depending on the type and version of your wireless controller, the software

revision number (eg. r04) may be briey displayed, the controller will then display

its default time of 4:00 (unregistered).

The digital mixer valve will now begin to make a noise as it resets itself and
registers with the wireless controller.

Registration in progress symbol is displayed for approximately

30 seconds. Do not remove the batteries or switch o󰀨 the digital

mixer valve. Registration in progress symbol goes out indicating
the digital mixer valve and wireless controller have been assigned
to each other.

Place wireless controller in approximate nal position (no more

than 10 m (free air) from digital mixer valve) and test wireless
signal by pressing “1” or “2”, and adjusting the temperature. If
temperature display remains unchanged and “out of range” symbol
is displayed, units are unable to communicate with each other.

If test fails, reposition the controller closer to the digital mixer valve and repeat

test until satised the shower will work reliably at all times.

Registration in

Progress

Symbol

Out of Range

Symbol

1199702-W2-H

40

RE-REGISTERING

The wireless controller has previously been registered to the digital mixer at the
factory, if communication problems are encountered, a re-registering of the wireless
controller may be required.

A re-registering of the wireless controller must also be performed should the control
PCB in the Digital Mixer Valve be replaced.

To re-register the wireless controller to the Digital Mixer Valve carry out the following
sequence.

Isolate power to the Digital Mixer
Valve.

Press “ + ” and “ ” buttons
simultaneously until “End” is
displayed on the screen.

Restore power to the digital mixer
valve.

Briey press the “ + ” and “ ” buttons,

“SET” will be displayed on the screen.
Note! if display reads “Err” press

“ ” and repeat the process.

Note! Re-registering can only be performed if the wireless controller has previously
been assigned to a digital mixer. This is indicated by the clock time default 10:00
(when batteries are connected).

41

1199702-W2-H

FAULT DIAGNOSIS

Read the section “Important Safety Information” rst.
As with most electronic equipment resetting the mixing valve by powering it down waiting a
few seconds then powering it up again can often cure any issues.

The Digital Mixer Valve is one part of an entire plumbing system. The tting of a pump places
additional requirements and some systems may require plumbing modications to allow them
to cope with higher ow rates.

Providing the Digital Mixer Valve has been correctly installed and is operated in accordance

with the instructions contained in this guide, di󰀩culties should not arise.

If any maintenance is required then it must be carried out by a competent tradesperson.
Before replacing any parts make sure that the underlying cause of the malfunction has been
resolved.

Warning! There are no user serviceable components beneath the cover of the appliance.
Only a competent tradesperson should remove the cover.

Loss of/or poor radio communication (out of range symbol maybe illuminated
on wireless controller

Symptoms Probable Cause Possible Remedy

Various faults or problems can
be attributed to Loss of / or

poor radio communications

1199702-W2-H

The wireless controller batteries

are at or incorrectly tted

Aerial loose inside digital mixer
box

Digital mixer sited too far from
the wireless controller

Radio signal being blocked
by building structure or other

xtures and ttings. Steel tanks,

hot water cylinders, thick brick
walls etc.

External radio interference from
other radio sources.

Wireless controller lost
registration.

Digital Mixer valve box or
Wireless Controller failure

42

Refer to “Replacing the
Batteries” in the Wireless
Controller User Guide

Correctly t the aerial inside the

digital mixer box. (Isolate power
before removing the Digital
Mixing Valve lid)

Reposition the digital mixer
closer to the wireless controller
or vice versa, refer to “Position

and Signal Test”

Physical environment requires
altering, refer to “Important
Information Regarding Radio
Controlled Devices”

Ensure all other radio
transmitting devices, including
mobile phones, are switched

o󰀨, refer to “Position and Signal

Test”

Re-register the wireless
controller, refer to “Re-

Registering”.

Contact Kohler Mira Ltd.

No Display

Symptoms

Probable Cause Possible Remedy

General Fault Diagnostics

The wireless controller

batteries are at or incorrectly

tted.

Refer to “Replacing the

Batteries” in the Wireless

Controller User Guide.

No water ow / will not turn on

(wireless controller display is on)

Wireless controller failure.

HP/Combi valve fitted to a
Pumped Gravity water system

No power to the digital mixer

Inlet water supply isolators not
fully turned on

Inlet water supply failure

Inlet filters or check valves
blocked

Outlet hose or handset blocked

Digital Mixing valve air locking

Loss of / or poor radio
communications (out of range
symbol maybe illuminated on
wireless controller).

Contact Kohler Mira Ltd.

HP/Combi valves are not suitable
for Pumped Gravity water system,
refer to “Typical Suitable

Installation”.

Check electrical connection and
power supply

Check and remedy

Check and remedy

Check and remedy, refer to

“Maintenance”

Check and remedy

Check for correct installation
practices, repeat commissioning
procedure and rearrange pipework
to avoid airlock forming, refer to

“Typical Suitable Installations”

Refer to “Loss of / or poor radio
communications” section above

Digital Mixer valve box or Wireless
Controller failure

43

Contact Kohler Mira Ltd

1199702-W2-H

Symptoms Probable Cause Possible Remedy

Low ow Flow adjustment on wireless

controller set too low

Inlet water supply isolators not
fully turned on

Inlet filters or check valves
blocked

Outlet hose or handset blocked

Inlet Water pressures too low

Flow calibration (HP/Combi
version only) not suitable for
water system conditions

Hot inlet flow regulator not
suitable for water system
conditions (HP/Combi version
only)

Increase ow using user wireless
controller bezel (Platinum
models) or ow buttons (non-

Platinum models), refer to
"Using The Shower" in the
Wireless Controller User Guide

Check and remedy

Check and remedy, refer to

“Maintenance”

Check and remedy

Check maintained water
pressure is within recommended

range, refer to “Specications”.

Perform flow calibration
procedure, refer to “Changing
Function Settings” in the
Wireless Controller User Guide

Refer to “Use of Flow
Regulators” for correct
operation

1199702-W2-H

Digital Mixer valve air locking

Digital Mixer valve box installed
above cold water storage cistern
(Pumped valve only)

Digital Mixer valve box failure

44

Check for correct installation
practices, repeat commissioning
procedure and rearrange
pipework to avoid airlock
forming, refer to “Typical

Suitable Installations”

No product fault. Appliance
not suitable for negative
head installation, refer to

“Installation”

Contact Kohler Mira Ltd

Symptoms Probable Cause Possible Remedy

Keeps cutting out “Eco” setting enabled. Eco

reduces ow time to 5 minutes

“Warm-up” setting is enabled.

Warm-up stops the ow of

water once the shower has
reached the desired showering
temperature

“Shower run time” setting
is enabled. Shower run time
reduces the shower run time

to a user dened time

Loss of / or poor radio
communications (out of range
symbol maybe illuminated on
wireless controller).

Digital Mixing valve air locking

No product fault, refer to
“using the shower” in the
Wireless Controller User
Guide book and set as
required

No product fault, refer to
“using the shower” in the
Wireless Controller User
Guide book and set as
required

No product fault, refer to
“using the shower” in the
Wireless Controller User
Guide book and set as
required

Refer to “Loss of / or poor
radio communications”
section above

Check for correct
installation practices, repeat
commissioning procedure
and rearrange pipework
to avoid airlock forming,
refer to “Typical Suitable

Installations”

Temperature and ow control

is not very responsive

Digital Mixer valve box or
Wireless Controller failure

Loss of / or poor radio
communications (out of range
symbol maybe illuminated on
wireless controller).

Digital Mixer valve box or
Wireless Controller failure

45

Contact Kohler Mira Ltd

Refer to “Loss of / or poor radio
communications” section
above

Contact Kohler Mira Ltd

1199702-W2-H

Symptoms Probable Cause Possible Remedy

Shower temperature too cool Temperature adjustment on

wireless controller set too low

Unable to increase showering
temperature because
maximum shower temperature
set too low for installation

Inlet lters or check valves

blocked

Outlet hose or handset
blocked

Reversed inlet supplies

Hot inlet water supply
temperature is too cool

Insu󰀩cient quantity of stored

hot water

Increase the temperature by
pressing the “+” button on
the wireless controller, refer
to “Using The Shower” in
the Wireless Controller User
Guide

Increase “F1 - Maximum
Water Temperature”, refer
to “Changing Functions/
Settings” in the Wireless
Controller User Guide

Check and remedy, refer to

“maintenance”

Check and remedy

Check and remedy

Increase hot inlet water
temperature to between
55°C and 65°C, refer to

“Specications”

Hot water supply running out,
increase storage capacity to
minimum 120 litres, refer to

“Specications”

1199702-W2-H

Inlet water supply pressures
are unstable or imbalanced

Combination boiler cutting in
and out (HP/Combi valve only)

Outlet pipe run is too long

Digital Mixer valve box or
Wireless Controller failure

46

Ensure the water supply
pressures are stable and
nominally equal, refer to

“Specications”

Refer to “Use of Flow
Regulators” for correct

operation

Ensure outlet pipe work is
thermally lagged.

Contact Kohler Mira Ltd

Symptoms Probable Cause Possible Remedy

Shower temperature too hot or

uctuates

Temperature adjustment on
wireless controller set too high

Hot inlet water supply
temperature is too hot

Inlet lters or check valves

blocked

Combination boiler cutting in
and out (HP/Combi valve only)
causing blend temperature

uctuations

Inlet water supply pressures
are unstable or imbalanced

Shower temperature a󰀨ected

by the use of adjacent hot/

cold tap. Insu󰀩ciently sized

pipework to feed both Digital
Mixing Valve and taps at the
same time.

Increase the temperature by
pressing the “-” button on
the wireless controller, refer
to “Using The Shower” in
the Wireless Controller User
Guide

Reduce hot inlet water
temperature to between
55°C and 65°C, refer to

“Specications”

Check and remedy, refer to
‘Maintenance’

Refer to “Use of Flow
Regulators” for correct
operation

Ensure the water supply
pressures are stable and
nominally equal, refer to

‘Specications’

Increase pipe sizes or

separately feed shower, refer
to ‘Installation’ for correct
plumbing method

The ‘Warm-up’ feature is being
used with a combi boiler (HP/
Combi valve only) refer to ‘Use
of Warm-up’

Digital Mixer valve box or
Wireless Controller failure

47

Disable the ‘warm-up’ feature,
refer to ‘Changing Functions’
in the Wireless Controller User
Guide

Contact Kohler Mira Ltd

1199702-W2-H

Symptoms Probable Cause Possible Remedy

User Interface displaying
Error 3 or Error 7 - Showering
temperature has got too hot
and the Digital Mixer has
safely shutdown

Hot inlet water supply
temperature is too high

Combination boiler cutting in
and out (HP/Combi valve only)
causing blend temperature

uctuations

Cold inlet water supply

pressure too low or uctuating

Cold inlet water supply failure

Inlet lters or check valves

blocked

Digital Mixing valve air locking

Reversed inlet supplies

Reduce hot inlet water
temperature to between
55°C and 65°C, refer to

“Specications”

Refer to “Use of Flow
Regulators” for correct

operation

Ensure the water supply
pressures are stable and
nominally equal, refer to

“Specications”

Check and remedy

Check and remedy, refer to

“Maintenance”

Check for correct
installation practices, repeat
commissioning procedure
and rearrange pipework
to avoid airlock forming,
refer to “Typical Suitable

Installations”

Check and remedy

Digital Mixer valve box failure

Internal Leaking Pumped Gravity LP valve

1199702-W2-H

tted to a HP/Combi water

system

Digital Mixer valve box failure

48

Contact Kohler Mira Ltd

Pumped Gravity LP valves
are not suitable for connection
to HP/Combi water systems,
refer to “typical suitable

installation”

Contact Kohler Mira Ltd

Symptoms Probable Cause Possible Remedy

No shut o󰀨 / Continuous ow /

Shower Fitting Drain Down

Noise Digital Mixing valve air locking

Natural drain down of shower

ttings

Loss of / or poor radio
communications (out of range
symbol maybe illuminated on
wireless controller).

Digital Mixer valve box failure

No Product Fault. It is natural
for all shower outlets to
continue to expel water for
a short period of time after
use. It is not uncommon for
larger deluge shower heads,
particularly those connected
to long outlet pipe runs
and therefore holding large
volumes of water, to drain
down water several hours after
use due to the changes in
the ambient temperature. We
would therefore recommend
that all water outlets are kept
enclosed within the water
catchment area.

Refer to “Loss of / or poor
radio communications”
section above

Contact Kohler Mira Ltd

Check for correct
installation practices, repeat
commissioning procedure
and rearrange pipework
to avoid airlock forming,
refer to “Typical Suitable

Installations”

Water Hammer

Amplied acoustic noise from

the pump due to structure of

wall or ooring mounting

Digital Mixer valve box failure

49

Ensure all pipework is

securely xed, refer to

“Installation”

The type of wall or ooring the
appliance is xed to will a󰀨ect

the perceived noise level; solid
walls will provide a quieter
operation.

Contact Kohler Mira Ltd

1199702-W2-H

MAINTENANCE

General

Read the section “Important Safety Information” rst.

Before replacing any parts ensure that the underlying cause of the malfunction has
been resolved.

If the shower is dismantled during installation or servicing then upon completion the
product must be inspected to ensure there are no leaks.

Warning! There are no user serviceable components beneath the cover of the
appliance. Only a competent tradesperson should remove the cover.

Cleaning

Many household cleaners contain abrasives and chemical substances, and should not

be used for cleaning plated or plastic ttings. These nishes should be cleaned with

a mild washing up detergent or soap solution, and then wiped dry using a soft cloth.

Checkvalve Cartridges and Filters - Removal and Installation

Hot water entering the cold supply, or vice versa, indicates that immediate attention is
necessary. This is carried out by removing and cleaning, or renewing as necessary,
the checkvalve cartridges.

Note! Ensure for HP Mixer Valve that ow regulator is retted in hot supply.

Isolate the electrical and water
supplies to the Digital Mixer Valve,

and open an outlet tting to release

pressure and to assist the draining
of residual water.

Unscrew plastic nuts and either
withdraw pipework or remove
Digital Mixer to gain access to the

checkvalve cartridges and lters.

Use flat blade screwdriver to
carefully lever cartridges out.

Remove lters and clean or renew.

Ret seals, pipes and plastic nuts. Plastic nuts require hand tightening only.

Restore water supply and electrical supply. Test shower and check for leaks.

1199702-W2-H

50

SPARE PARTS

Digital Mixer - High Pressure / Combi Valve

B

(x 7)

1666.223
Aerial

1796.140
Control PCB

1664.123
Stepper Motor
Extension Lead

1796.139
Mains Cable

1666.210
Thermistor

B

A

1666.215
Flow Regulator

1666.212 Seal Pack - Components Identied ‘A’

1666.213 Screw Pack - Components Identied ‘B’

51

1664.123
Solenoid
Extension Lead

1796.143
Mixing Valve &

A

A

Outlet 2 Assembly

1666.209
Inlet Cartridge
+ Filter (x1)

1666.225
Push Fit Isolator

1666.199
Inlet/Outlet
Connector (x1)

A

1199702-W2-H

Digital Mixer - Pumped Valve

1796.139
Mains Cable

1796.136
Solenoid Cable

B
(x7)

1666.224
Aerial

1666.198

Outlet Tube (x1)
Includes: 1666.194

A

1796.137
Control PCB

C

1666.194
Transfer
Tube

A

A, C

1666.196
Outlet Clamp

D

A, D

1666.210
Thermistor

1666.209
Inlet Cartridge
+ Filter (x1)

1666.195
Pump Assembly

1666.225
Push Fit Isolator

1666.192
Mixing Valve
Assembly Includes:

166.199 (x3)

1666.209 (x2)

1666.210 (x1)

1666.199
Inlet/Outlet
Connector (x1)

1666.212 Seal Pack - Components Identied ‘A’

1666.213 Screw Pack - Components Identied ‘B’

1666.197 Solenoid - Components Identied ‘C’

1796.138 2nd Outlet Solenoid - Components Identied ‘D’

1199702-W2-H

52

Shower Fittings - Showerhead

1688.195
Supply Tube

1688.194
Chrome Supply
Tube

1799.015
Ceiling Plate

1841.088

Component Pack

RAC Pack

1841.090

Internal Parts

1841.088
Components Pack

(x2)

1688.396
Elbow

1841.090
Internal Parts

1688.198
Wall Spacer (x2)

1688.187
Slide Bar
Support

1841.088

Component Pack

(x2)

1841.088
Component Pack

1841.090

Internal Parts

A

A

1841.087
RAC Cover

1688.191
Upper Support

A

1688.185
Clamp
Bracket

1688.193
Slide Bar

632.73
Hose Washer (x2)

1688.201
360M Showerhead

1688.282
Check valve

1603.104
Shower Hose

1688.187
Slide Bar
Support

A

1688.184 Seal and Screw Pack - Components Identied ‘B’.

1688.190 Classic Fittings Component Pack - Components identied ‘A’.

53

A

1688.312
Installation Template

1199702-W2-H

Shower Fittings - Deluge Head

1688.396
Elbow

1656.132
Concealing
Shroud

1799.015
Concealing
Plate

1688.194
Chrome Supply
Tube

1799.013

Brazed

Pipe

Digital Mixer - User Interface

1799.014
Ceiling Mount
Plate

1656.131
Backplate
Assembly

1799.009
Rigid Arm

1799.008
250mm Deluge Head
(Chrome)

1799.016
Deluge Fittings
Component Pack

1796.133
User Interface

1796.142
Backplate
(Includes Screws &
Wallplugs)

1199702-W2-H

1796.141
Battery Lid
(Includes Screws)

54

DISPOSAL AND RECYCLING

End of Product Life

Electrical and electronic devices contain a range of materials that can be separated
for recycling and used in new products.

This product should not be disposed of with your general household waste.
When this product has reached the end of its serviceable life, please
remove the batteries and take it to a recognised WEEE (Waste Electrical
and Electronic Equipment) collection facility such as your local civic amenity
site for recycling.

Your local authority or retailer will be able to advise you of your nearest collection
facility.

Batteries

Spent batteries should not be disposed of with your normal household waste. Contact
your local authority for information on waste disposal and recycling.

55

1199702-W2-H

CUSTOMER SERVICECUSTOMER SERVICE

Guarantee

Your product has the bene t of our manufacture's

guarantee which starts from date of purchase. This
guarantee only applies in the United Kingdom and
Republic of Ireland. To activate this guarantee, please
return your completed registration card, visit our
website or free phone [phone] within 30 days
of purchase (UK only).

Within the guarantee period we will resolve defects in
materials or workmanship, free of charge, by repairing
or replacing parts or product as we may choose.

This guarantee is in addition to your statutory
rights and is subject to the following conditions :

● The guarantee applies solely to the original

installation under normal use and to the original
purchaser only. The product must be installed and
maintained in accordance with the instructions
given in this guide.

● Servicing must only be undertaken by us or our

appointed representative.
Note! If a service visit is required the product must
be fully installed and connected to services.

● Repair under this guarantee does not extend

the original expiry date. The guarantee on any
replacement parts or product ends at the original
expiry date.

● For shower  ttings or consumable items we

reserve the right to supply replacement parts only.

The guarantee does not cover:

● Call out charges for non product faults (such as

damage or performance issues arising from
incorrect installation, improper use, inappropriate
cleaning, lack of maintenance, build up of
limescale, frost damage, chemical attack,

corrosion, system debris or blocked  lters) or

where no fault has been found with the product.

● Water or electrical supply, waste and isolation

issues.

● Compensation for loss of use of the product or

consequential or indirect loss of any kind.

● Damage or defects caused if the product is
repaired or modi ed by persons not authorised by

us or our appointed representative.

● Routine maintenance or replacement parts to
repaired or modi ed by persons not authorised by

comply with the requirements of the TMV2 or

repaired or modi ed by persons not authorised by

TMV3 healthcare schemes

● Accidental or wilful damage.

● Products purchased ex-showroom display.

What to do if something goes wrong

If your product does not work correctly refer to this
manual for fault diagnosis and check that it is installed
and commissioned in accordance with our instructions.
If this does not resolve the issue, contact us for help
and advice.

Helpdesk Service

Contact our Customer Services Team for

product advice, to purchase spare parts or
accessories or to set up service visit. You can contact
us via phone or e-mail - contact details below.
Please provide your model name, power rating (if
applicable) and date of purchase.

Mira Showers Website

(www.mirashowers.co.uk)

Visit our website to register your guarantee,
download user guides, diagnose faults, purchase our
full range of accessories and popular spares, or request
a service visit.

Spares and Accessories

We hold the largest stocks of genuine Mira

spares and accessories.Contact us for a
price or visit our website to purchase items from our
accessory range and popular spares. (Only available
in the United Kingdom )

Service/Repairs

No one knows our products better than our

nationwide team of Service Technicians. We
can carry out service or repair work to your product both
during and after the guarantee period. (Only available in
the United Kingdom and Republic of Ireland) Ask about

our  xed price service repairs.

To Contact Us: UK

0800 001 4040

Fax: [phone]

Email – Visit

www.mirashowers.co.uk/contactus

By Post: Mira Customer Services Dept, Cromwell

Road, Cheltenham, Gloucestershire GL52 5EP

To Contact Us: Eire Only

01 531 9337

E-mail:

[e-mail]

Mira is a registered trade mark of

Kohler Mira Limited.

The company reserves the right to alter

product specifi cations without notice.

1199702-W2-H

(L15F, N85K, N85L, N86F) (1796)

56

14648

© Kohler Mira Limited, August 2018

Check out our full range of Showers

Electric Showers

Digital Showers

Mixer Showers

Power Showers

Smart Showers

Shower Towers

From Top Shower Brands

Mira Showers

Aqualisa Showers

Triton Showers

Gainsborough Showers

Shower Pumps can upgrade your showering experience even more

Stuart Turner Shower Pumps

Salamander Shower Pumps

Grundfos Shower Pumps