Mira Vier Dual

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Document DEVICE REPORT1212373-w2-d-mira-vier-dual-installation-and-user-guide
Mira Vier Dual

These instructions must be left with the user
Installation Guide

1

1212373-W2-D

CONTENTS
Introduction................................................................................................. 3 Products Covered by this Guide........................................................... 3 Guarantee............................................................................................. 3 Patents and Design Registration........................................................... 3
Important Safety Information...................................................................... 4 Pack Contents............................................................................................ 6 Specifications............................................................................................. 9
Standards and Approvals...................................................................... 9 Dimensions............................................................................................... 11 Installation................................................................................................ 13
General................................................................................................ 13 Important Information Regarding Radio Controlled Devices............... 13 Use of Flow Regulators with Combination Boilers ............................. 15 Installation Schematic......................................................................... 19 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............................................................................................. 49 Spare Parts.............................................................................................. 50 Disposal and Recycling............................................................................ 54 Notes........................................................................................................ 55 Customer Service........................................................................Back Page

If you experience any difficulty 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.

1212373-W2-D

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 Vier Dual Mixer Valve is designed to be used with the Mira Vier showerhead and fittings.

Products Covered by this Guide
Mira Vier Dual Digital Mixer - High Pressure / Combi Valve

Mira Vier Dual Digital Mixer - Pumped Valve.

Mira Vier Dual Wireless Controller.

Mira 360 Fittings (Ceiling Fed or Rear Fed).

Guarantee
For domestic installations, Mira Showers guarantee the Mira Vier Dual against any defect in materials or workmanship for a period of five years from the date of purchase (shower fittings for one year).
For non-domestic installations. Mira Showers guarantee the Mira Vier Dual 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



Patents and Design Registration

Design Registration Patents
Patent Applications

001203301
GB: 2 392 225, 2 421 297 USA: 7 240 850, 7 669 776
UK: 0723827.2 Europe: 2 227 647 China: CN 101918743A India: 1306/MUMNP/2010 USA: US-2010-0282326-A1 WO: 2009/022112, 2009/071902
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1212373-W2-D

IMPORTANT SAFETY INFORMATION
Warning!
Follow all warnings, cautions and instructions contained in this guide, and on or inside the appliance.
1. THIS APPLIANCE MUST BE EARTHED. ENSURE SUPPLEMENTARY BONDING COMPLIES WITH THE "REQUIREMENTS FOR ELECTRICAL INSTALLATIONS". The Mira Digital Mixer Valve is intended to be permanently connected to the fixed electrical wiring of the mains system. A means for electrical isolation of the appliance shall be provided in the fixed wiring in accordance with local wiring regulations.
2. Products manufactured by us are safe and risk-free, provided that they are installed, used and maintained in good working order, in accordance with our instructions and recommendations.
3. Isolate the electrical and water supplies before connecting to the appliance.
4. This appliance must be provided with means for disconnection that is incorporated into the fixed wiring in accordance with the relevant local wiring regulations.
5. Refer to the wiring diagram before making any electrical connections.
6. Mains connections are exposed when the cover of the Digital Mixer Valve is removed.
7. The Digital Mixer Valve must not be installed where it can become frozen.
8. Make sure that any pipework that could become frozen is properly insulated.
9. In accordance with BS7671 a 30mA Residual Current Device (RCD) should be included in the electrical circuit. This may be part of the consumer unit or a separate unit.
10. All pipework must be checked for leaks before the product installation is completed. The product should be pressurised and both inlet & outlet connections inspected.
11. If the shower is dismantled during installation or servicing then upon completion the product must be inspected to ensure all electrical connections are tight and that there are no leaks.
12. Having completed the installation, make sure that the user is familiar with the operation of the appliance.
13. DO NOT commission this appliance if water leaks from the unit. 14. Only Mira recommended outlet fittings should be used.
15. Ensure all electrical connections are tight, to prevent overheating.
16. This product is not suitable for areas with high humidity (i.e steam rooms). Please consult your installer.
17. 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.

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4

Caution!
1. Read all of these instructions and retain this guide for later use. 2. The electrical installation must comply to "BS 7671 - Requirements for Electrical
Installations" commonly referred to as the IEE Wiring Regulations, or any particular regulations and practices, specified by the local electricity supply company. 3. The plumbing installation must comply with the requirements of UK Water Regulations / By-laws (Scotland), Building Regulations or any particular regulations and practices, specified by the local water company or water undertakers. 4. Make sure that you fully understand how to operate this shower and make sure that it is properly maintained in accordance with the instructions given in this manual. 5. Children should be supervised to make sure that they do not play with the appliance. 6. Anyone who may have difficulty understanding or operating the controls of the shower should be supervised whilst showering. Particular consideration should be given to: · The young
· The elderly
· The infirm
· The disabled
· Anyone who suffers from a medical condition that can result in
temporary incapacity (e.g. Epilepsy or blackouts).
· Anyone inexperienced in the correct operation of the controls.
7. The appliance is not intended for use by persons (including children) with reduced physical, sensory or mental capabilities, unless they are supervised or have been given instruction concerning the use of the appliance by a person responsible for their safety. Sunburn or skin conditions can increase your sensitivity to hot water. Make sure that you set the shower to a cooler temperature.
8. If any of the following conditions occur, isolate the electricity and water supplies and refer to section "To contact us", in the back cover of this guide. · If the cover is not correctly fitted and water has entered the appliance case.
· If the case is damaged.
· If the appliance begins to make an odd noise, smell or smoke.
· If the appliance shows signs of a distinct change in performance, indicating a need for maintenance.
9. DO NOT operate if water leaks from the appliance. 10. DO NOT operate this appliance if it is frozen. If suspected of being frozen, isolate
and contact us for advice.

5

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PACK CONTENTS
Tick the appropriate boxes to familiarise yourself with the part names and to confirm 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

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

1 x Wireless Controller

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6

3 x Fixing Screws 3 x Wall Plugs 2 x Outlet Connector
2 x Fixing Screws 2 x Wall Plugs 3 x AA Batteries

Ceiling Fed Fittings
1 x Plastic Pipe
2 x Brackets

2 x Ceiling Plate

1 x Deluge Head
1 x Ceiling Mount Plate

2 x Elbow Kit

1 x Showerhead

2 x Spacers

2 x Extension

1 x Slide Bar Assembly

1 x Brazed Pipe

1 x Ceiling Plate Component Pack

1 x Hose
1 x Hex Key 2 x 70 mm Screws 2 x 45 mm Screws 2 x Wall Plugs 2 x Hex Screws
7

2 x Rubber Washers
1 x Installation Template (not shown)
1212373-W2-D

Rear Fed Fittings
2 x Brackets
1 x Showerhead
1 x Slide Bar Assembly

1 x Concealing Shroud
1 x Shower Arm
1 x Deluge Head
1 x Backplate Assembly

2 x End Plugs

1 x Hose

2 x Rubber Washers

1 x Fittings Pack

1 x Right Angle Connector (RAC) Kit
2 x Hex Screws 2 x Wall Plugs 2 x 45 mm Screws 1 x Hex Key
1212373-W2-D

1 x Right Angle Connector Shroud
1 x Installation Template (not shown) 8

SPECIFICATIONS

Standards and Approvals

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

The Mira Vier 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/Pushfit

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

50 kPa (0.5 bar) = 5 m max. total head

Supply Pressure Differential

Nominally Equal

Temperatures

Maximum Temperature (factory preset)

45 °C

Maximum Temperature (setting range)

39 °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

Flow Rates and Times

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

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

Electrical

Supply Voltage

230V AC 50 Hz

Maximum Load

20 W

9

1212373-W2-D

Mira Digital Mixer Valve Pumped Pressures
Maximum Static Pressure Maximum Maintained Pressure Minimum Maintained Pressure Supply Pressure Differential
Temperatures
Maximum Temperature (factory preset) Maximum Temperature (settable range) Minimum Temperature
Hot Water Range Cold Water Range Temperature Stability Ambient Temperature Maximum Relative Humidity
Flow Rates and Times
Flow Rates (will vary depending on inlet maintained pressure and spray mode)
Electrical
Supply Voltage Maximum Load

100 kPa (1 bar) = 10 m max. total head 100 kPa (1 bar) = 10 m max. total head 1 kPa (0.01 bar) = 0.1 m min. total head Nominally Equal
45 °C 39 °C - 48 °C Thermostatic control down to 30 °C Full cold also selectable 50°C - 65°C 1°C - 20°C ± 1°C at recommended supply conditions 1°C - 40°C 95% non-condensing
Max @ 0.01 bar = 16 l/min Min @ 0.01 bar = 6 l/min
230V AC 50 Hz 200 W at 230V AC

1212373-W2-D

10

242 mm 205 mm

Digital Mixer Valve
68 mm

DIMENSIONS
315 mm 239 mm

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

KOHLER MIRA LTD. CHELTENHAM GL52 5EP TEL: (+44) 0870 241 0888
www.mirashowers.co.uk

VERTICAL

HORIZONTAL

F14319/1

HOT

COLD

35 mm 85 mm

46 mm 60 mm
394 mm

60 mm 44 mm

ISOLATE MAINS ELECTRICITY BEFORE REMOVING COVER! 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

MOUNTING POSITION

OR

KOHLER MIRA LTD. CHELTENHAM GL52 5EP TEL: (+44) 0870 241 0888
www.mirashowers.co.uk

VERTICAL

HORIZONTAL

F14318/1

HOT

COLD

46 mm 315 mm

Shower Fittings - Fixed Head Arm
420 mm

289 mm 234 mm

130 mm

250 mm

11

1212373-W2-D

Shower Fittings - Slide Bar and Showerhead
150 mm 62 mm

645 mm Maximum to ceiling

600 mm 650 mm

82 mm

Shower Fittings - Ceiling Fed Arm

51 mm

60 mm Minimum 600 mm Maximum

250 mm

1212373-W2-D

12

INSTALLATION
General
The installation must be carried out in accordance with these instructions, and must be conducted by designated, qualified and competent personnel.
The Digital Mixer Valve 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 Digital Mixer Valve 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 a mixer valve 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 valve in a location where any leak would be contained or routed to avoid areas sensitive to water damage.
Isolating valves must be installed to both inlets (supplied) and outlet, close to the Digital Mixer Valve for ease of maintenance.
Caution! Risk of product damage. The Digital Mixer Valve must be installed in a dry, ventilated area where it will not freeze.

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 Vier 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 difficulty registering the wireless controller and digital mixer ensure all other radio interference is temporarily switched off.
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

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Typical Suitable Installations:

1. Instantaneous Multipoint Water Heaters and Combination Boilers
Caution! Risk of product damage. Do not fit the Mira Digital Mixer - PUMPED VALVE with Instantaneous Multipoint Water Heaters or Combination Boilers.

Combination Boiler

Outlet 2 (warm) Outlet 1 (warm)

Deluge Head

Digital Mixer Valve (HP)

Key to Symbols

Cold Hot

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

KOHLER MIRA LTD. CHELTENHAM GL52 5EP TEL: (+44) 0870 241 0888
www.mirashowers.co.uk

VERTICAL

HORIZONTAL

F14319/1

HOT

COLD

Mira Vier Shower Fittings

Float Valve
Isolating Valve
Pressure Reducing Valve
Tempering Valve Overflow 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-off rate indirectly controls the gas flow rate to the burner).
An expansion vessel must be fitted (and regularly maintained) if any form of backflow prevention device is fitted, 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 fitted within the boiler (check with the manufacturer) and is in addition to the normally larger central heating expansion vessel.

1212373-W2-D

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 flow 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 fitted with an 8 l/min hot inlet flow regulator. If installing a single outlet digital mixer with a combi boiler rated 36kW or greater or to mains pressurised systems the hot inlet flow regulator should be removed.

Note: The Mira Dual outlet digital mixing valves do not have a factory fitted hot inlet flow regulator. These are supplied in the component pack. The table indicates which flow regulator should be fitted 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 filter.
Use flat blade screwdriver to carefully lever cartridge out.
Fit/remove the flow regulator from checkvalve cartridge behind filter as required.
Refit seal, pipe and plastic nut. Plastic nuts require hand tightening only.

15

1212373-W2-D

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 fluctuation. This is caused by the normal operation of a standard instantaneous water heater/combination boiler whereby the boiler will turn off when the flow is stopped (as happens after the warm-up sequence has been completed). Upon restart of the shower, a cold shot will be flushed 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 fit the Mira Digital Mixer - PUMPED VALVE with Mains Pressurised Systems.

Dual Outlet Digital Mixer Valve (HP)

Outlet 2 (warm) Outlet 1 (warm)

Deluge Head

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

KOHLER MIRA LTD. CHELTENHAM GL52 5EP TEL: (+44) 0870 241 0888
www.mirashowers.co.uk

VERTICAL

HORIZONTAL

F14319/1

HOT

COLD

Mira Vier Shower Fittings

Hot
Cold
HOT COLD

Packages of this type, fitted with a tempering valve can be used. A drop type pressure reducing valve must be fitted (and regularly maintained) if any form of backflow prevention device is fitted, e.g. non-return valve, PRV, then an expansion vessel should also be fitted. This will ensure that excess expansion or pulse pressures do not damage the product or the plumbing system. The expansion vessel may already be fitted externally or internally within the thermal store (check with thermal store manufacturer).

1212373-W2-D

16

3. Gravity Fed Showers
Caution! Risk of product damage. Do not fit the Mira Digital Mixer - HIGH PRESSURE / COMBI VALVE with Gravity Fed Systems.

Cistern Minimum 230 litres

1.0 metre minimum

cold

cold

hot hot

COLD

KOHLER MIRA LTD. CHELTENHAM GL52 5EP TEL: (+44) 0870 241 0888
www.mirashowers.com
HOT F9001

OR

POSITION APPLIANCE

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

MIRA DM2 WIRELESS HP/COMBI 1666.009 N85A MANUFACTURED

ISOLATE MAINS ELECTRICITY BEFORE REMOVING COVER!
DIGITAL MIXER 2 WIRELESS

ISOLATE MAINS ELECTRICITY BEFORE REMOVING COVER! 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

MOUNTING POSITION

OR

KOHLER MIRA LTD. CHELTENHAM GL52 5EP TEL: (+44) 0870 241 0888
www.mirashowers.co.uk

VERTICAL

HORIZONTAL

F14318/1

HOT

COLD

Dual Outlet Digital Mixer Valve (Pumped)

100 mm from the lowest level of water in the tank

warm
Deluge Head

Mira Vier Shower Fittings

30° - 60° Air Separation
cold
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-offs will not effect 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

1212373-W2-D

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

Less than 230 Litres

Incorrect Cold
Take-off

Bath Installation

Incorrect Hot
Take-off

Affected by Metal Bath / Poor or no Communication

Steel / Cast Bath

Less than 230 Litres

Shared Supplies

No Access

Incorrect Cold
Take-off

Plastic pipework not rigidly supported.

Air-locking Pipework

Shower Installation

Incorrect Hot
Take-off

Distance Too Far / Poor or No
Communication

1212373-W2-D

18

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

1212373-W2-D

Long inlet pipework (dead-legs) should be kept to a minimum to avoid temperature fluctuations.
Supply pipework layout must be arranged to minimize the effect 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 flushed through before connection to the digital mixer valve.
Valve Installation Orientation

Inlets Outlets

Inlets Outlets

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 power supply cable is damaged, it must be replaced by the manufacturer or a service engineer.

Warning! Turn off the electrical and water supplies before proceeding with the installation of the appliance. The electricity must be turned off at the mains and the appropriate circuit fuse electrically isolated, if applicable.

1212373-W2-D

20

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

OR

KOHLER MIRA LTD. CHELTENHAM GL52 5EP TEL: (+44) 0870 241 0888
www.mirashowers.co.uk

VERTICAL

HORIZONTAL

F14319/1

HOT

COLD

3 amp switched fused spur. Easily accesible

Ceiling Fed Deluge head

Valve Outlets
Ceiling Fed Shower Fittings

Cold Water Inlet Hot Water Inlet
10 m (Free air)

Rear Fed Fitting

Wireless Controller

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 affect 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 effect 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 fitting.

21

1212373-W2-D

The ambient temperature of Digital Mixer Valve site (loft space, airing cupboard etc...) can have an effect 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 briefly displayed, the controller will then display its default time of 10:00.
Place wireless controller in approximate final 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 the controller closer to the digital mixer valve and repeat test until satisfied the shower will work reliably at all times.

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 fixing holes in the required positions.

Fixing Screw x 3

1212373-W2-D

22

Drill and plug the fixing holes.
Note! Installers may wish to use alternative cavity fixings, when installing onto a dry lined, stud partition, shower cubicle or laminated panel wall structures. However, these methods of fixing are beyond the scope of this guide.
Secure the Digital Mixer Valve in position with the fixing screws (supplied).
Caution! Risk of product damage. Make sure both hot and cold supply pipes are flushed 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

Push-fit connector to the Shower Fittings

Cold Inlet

Outlets

Push-fit Isolators fitted to both Inlets
Hot Inlet

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

23

1212373-W2-D

Shower Fittings - Ceiling Fed Slide Bar / Showerhead
Suitable for solid, dry-lined, stud partition, shower cubicle or laminated panel walls.
The Slide Bar should be fixed 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 fit through ceiling.

64M5amx.m

Ceiling hole centre can be altered to

avoid roof joists by using supplied

spacers.

600 mm
Using template as guide, mark positions of the fixing holes for Wall Brackets (600 mm). Upper hole to be no more than 645 mm from ceiling.

Optional spacers (supplied)

Note! Use spirit level to make sure fixing holes are vertical.

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

1212373-W2-D

24

Drill and plug Slide Bar Assembly fixing holes.
Insert fixing screws through holes in Wall Brackets and fix to wall. Do not fully tighten. Use template to set correct distances between Wall Brackets. Fully tighten screws. Use longer fixing 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

1212373-W2-D

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 fit elbow (supplied) or alternative pushfit/compression fitting (not supplied).
When shortening for use with any push-fit (e.g. John Guest) fitting, follow manufacturer's guidelines for finishing 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 and lock elbow onto pipes using clips supplied.

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 fitting alternative push-fit connections and flexible pipework.

1212373-W2-D

26

Place first washer in end of hose, then attach to pipe end. Do not fit showerhead until after pipework has been fully flushed through. See section "Commissioning".

Ceiling Fed Deluge Head
The Deluge Head should be fixed 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 fitting 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 fixed 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.

Drill holes in line!

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
Ceiling Mount Plate Brazed Pipe

Threaded end
27

1212373-W2-D

Centralise the brazed pipe in the hole then screw the ceiling mount plate to the wooden support.

Offer 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 fit 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 sufficiently to clamp the pipe in place.

Offer 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.

Chrome Extension Tube

1212373-W2-D

28

30 mm
Determine the showering height
1/2" BSP Nut Olive
Brazed Pipe
Minimum 15 mm

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 flat 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 and lock elbow onto pipe using clip supplied.
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 fitting alternative push-fit connections and flexible pipework.
Do not fit deluge head until after pipework has been fully flushed 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

Threaded end of pipe

Ceiling Plate

Deluge Head
1212373-W2-D

Rear Fed Slide Bar / Showerhead
Suitable for solid, dry-lined, stud partition, shower cubicle or laminated panel walls.
The Slide Bar should be fixed 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 fixing holes for Wall Brackets (600 mm).
Note! Use spirit level to make sure fixing holes are vertical.

600 mm

Drill and plug fixing holes.

1212373-W2-D

30

Insert fixing screws through holes in Wall Brackets and fix 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

1212373-W2-D

The pipe work must protrude through the wall between 20-23 mm from the finished surface of the wall. Note! If the pipe protrudes further than 23 mm, it will prevent the backplate nut from engaging with the backplate. If necessary 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.
Loosely screw the backplate to the RAC wallplate with the two screws provided.
Place the RAC wallplate and backplate assembly over the pipe then mark the position of the RAC wallplate and its fixing holes on the wall.
Remove the screws and RAC wallplate from the backplate.
Drill the two RAC wallplate fixing holes. If necessary, make a recess approximately 6 mm deep to accept the RAC wallplate. Plug the two fixing holes.
Fix the wallplate to the wall with the two fixing screws.
Temporarily fit the two screws to the wallplate. This will prevent the holes from being blocked with plaster and grout.
Finish the surface of the wall as required.

1212373-W2-D

32

Wall Plate

20 - 23 mm

Arrow

RAC Backplate

Backplate Screws

Place the backplate over the outlet pipe with the arrow pointing vertically up and tighten the two backplate screws. Make sure that the foam seal abuts the finished wall surface.

Copper Pipe

Fit the olive and the backplate nut over the outlet pipe, do not tighten the nut fully at this point.

Check that the `O' seal is fitted to the outside of the backplate nut. Press the elbow onto the backplate, make sure that the clips on the elbow engage with the backplate.

To prevent the backplate from turning while tightening the nut, fit the retaining ring over the backplate nut making sure the slots engage with the screws on the backplate, hold the retaining ring with a wrench while tightening the backplate nut. Remove the retaining ring after use.

Slide the retaining ring over the elbow and engage with the elbow clips. Note! The retaining ring must be engaged correctly to lock the elbow to the backplate, rotate the retaining ring to the postition illustrated.

Press the shroud over the elbow, make sure that it engages with the lugs on the backplate.

Place first washer in end of hose, then attach to elbow. Do not fit showerhead until after pipework has been fully flushed through. See section "Commissioning".

Backplate

2 x Screws

Copper Pipe
Olive

Backplate Nut

Backplate Foam Seal

Retaining Ring

Elbow
Retaining Ring shown correctly engaged with Elbow 1
2

33

1212373-W2-D

Rear Fed Shower Arm and Deluge Head
The Shower Arm and Deluge Head should be fitted 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 finished 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 fixing holes. Caution! Be aware of hidden pipes or cables
For solid walls drill the fixing holes for the backplate with a 6 mm drill and insert the wall plugs (supplied). For other types of wall structure alternative fixings may be required (not supplied). Caution! Take care not to drill into hidden pipes or cables.

Minimum Distance to Ceiling 35 mm

Carefully fit the backplate over the outlet pipe and secure with the fixing screws (supplied). Caution! Take care not to damage the `O' Seal in the back of the backplate.

1212373-W2-D

34

18 ± 2 mm

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

Backplate 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.

Olive

Olive

Compression Nut

Hand tighten the concealing shroud onto the backplate.

Concealing Shroud

Do not fit deluge head until after pipework has been fully flushed through. Refer to section "Commissioning" in the Dual Outlet Installation Guide.

Shower Arm

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.

Flow Regulator (some models)

35

Shower Arm Deluge Head
1212373-W2-D

Wireless Controller
Suitable for solid, dry-lined, stud partition, shower cubicle or laminated panel walls. The wireless controller should be fixed 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 fixing to wall. See section `INSTALLATION - Digital Mixer Valve: Position and Signal Test'.
Mark position for backplate holes. Mount backplate on flat 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 finished wall surface.

Turn controller over and remove the battery cover by loosening the screws with a pozi drive screwdriver. Note! The screws remain attached to the battery lid.

Only fit 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.

1212373-W2-D

36

COMMISSIONING
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 flow water when switched on (" 1 " or " 2 ") depending on the outlet plumbing configuration.

Press " 1 " button and reduce temperature to full cold "CLd". Press " " to increase to full flow. For Low Pressure (pumped) version, let shower run in order to prime the pump. For long pipe runs, let the shower run to allow the pump to prime until a steady stream of water flows.
Caution! Risk of product damage. Do not run Pumped Valve (low pressure version) without a water supply for longer than 5 minutes during priming.
37

1212373-W2-D

Run cold water through (approximately 2 minutes) and check entire installation for water leaks. Press " 1 " to turn shower off. Fit the second hose washer and showerhead.

Press " 1 " to turn shower on. Test operation of shower by increasing/ decreasing both temperature and flow 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

= Off

Warm-Up Mode

= Off

Clock

= 10:00 (when batteries connected)

Clock Display

= On

Shower Duration

= Off

Bath Fill Mode

= Off

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.

1212373-W2-D

38

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 off 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 briefly 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.

Droplet symbol is displayed for approximately 30 seconds. Do not remove the batteries or switch off the digital mixer valve. Droplet symbol goes out indicating the digital mixer valve and wireless controller have been assigned to each other.

Droplet Symbol

Place wireless controller in approximate final 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 Out of Range

is displayed, units are unable to communicate with each other.

Symbol

If test fails, reposition the controller closer to the digital mixer valve and repeat test until satisfied the shower will work reliably at all times.

39

1212373-W2-D

RE-REGISTERING
The wireless controller has previously been registered to the digital mixer valve 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 " 1 " buttons simultaneously until "End" is displayed on the screen.
Restore power to the digital mixer valve.
Briefly press the "+" and " 1 " buttons, "SET" will be displayed on the screen. Note! if display reads "Err" press " 1 " and repeat the process.

1212373-W2-D

40

FAULT DIAGNOSIS

Read the section "Important Safety Information" first. 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 fitting of a pump places additional requirements and some systems may require plumbing modifications to allow them to cope with higher flow rates. Providing the Digital Mixer Valve has been correctly installed and is operated in accordance with the instructions contained in this guide, difficulties 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 on wireless controller

maybe illuminated

Symptoms

Probable Cause

Possible Remedy

Various faults or problems can be attributed to Loss of / or poor radio communications

The wireless controller batteries are flat or incorrectly fitted

Refer to "Replacing the Batteries" in the Wireless Controller User Guide

Aerial loose inside digital mixer box

Correctly fit the aerial inside the digital mixer box. (Isolate power before removing the Digital Mixing Valve lid)

Digital mixer sited too far from the wireless controller

Reposition the digital mixer closer to the wireless controller or vice versa, refer to "Position and Signal Test"

Radio signal being blocked by building structure or other fixtures and fittings. Steel tanks, hot water cylinders, thick brick walls etc.

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

External radio interference from other radio sources.

Ensure all other radio transmitting devices, including mobile phones, are switched off, refer to "Position and Signal Test"

Wireless controller lost registration.

Re-register the wireless controller, refer to "ReRegistering".

Digital Mixer valve box or Wireless Controller failure
41

Contact Kohler Mira Ltd. 1212373-W2-D

Symptoms No Display

Probable Cause
General Fault Diagnostics
The wireless controller batteries are flat or incorrectly fitted.

Possible Remedy
Refer to "Replacing the Batteries" in the Wireless Controller User Guide.

Wireless controller failure.

Contact Kohler Mira Ltd.

No water flow / will not turn on (wireless controller display is on)

HP/Combi valve fitted to a Pumped Gravity water system

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

No power to the digital mixer

Check electrical connection and power supply

Inlet water supply isolators not Check and remedy fully turned on

Inlet water supply failure

Check and remedy

Inlet filters or check valves blocked

Check and remedy, refer to "Maintenance"

Outlet hose or handset blocked Check and remedy

Digital Mixing valve air locking

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

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

Refer to "Loss of / or poor radio communications" section above

Digital Mixer valve box or Wireless Contact Kohler Mira Ltd Controller failure

1212373-W2-D

42

Symptoms
Low flow

Probable Cause

Possible Remedy

Flow adjustment on wireless controller set too low

Increase flow using user wireless controller bezel (Platinum models) or flow buttons (nonPlatinum models), refer to "Using The Shower" in the Wireless Controller User Guide

Inlet water supply isolators not

fully turned on

Check and remedy

Inlet filters or check valves Check and remedy, refer to

blocked

"Maintenance"

Outlet hose or handset blocked Check and remedy

Inlet Water pressures too low

Check maintained water pressure is within recommended range, refer to "Specifications".

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

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

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

Refer to "Use of Flow Regulators" for correct operation

Digital Mixer valve air locking

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

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

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

Digital Mixer valve box failure Contact Kohler Mira Ltd

43

1212373-W2-D

Symptoms
Keeps cutting out

Probable Cause

Possible Remedy

"Eco" setting enabled. Eco reduces flow time to 5 minutes

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

"Warm-up" setting is enabled. Warm-up stops the flow of water once the shower has reached the desired showering temperature

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

"Shower run time" setting is enabled. Shower run time reduces the shower run time to a user defined time

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

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

Refer to "Loss of / or poor radio communications" section above

Digital Mixing valve air locking
Digital Mixer valve box or Wireless Controller failure

Check for correct installation practices, repeat commissioning procedure and rearrange pipework to avoid airlock forming, refer to "Typical Suitable Installations"
Contact Kohler Mira Ltd

Temperature and flow control is not very responsive

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

Refer to "Loss of / or poor radio communications" section above

1212373-W2-D

Digital Mixer valve box or Wireless Controller failure

Contact Kohler Mira Ltd

44

Symptoms
Shower temperature too cool

Probable Cause

Possible Remedy

Temperature adjustment on wireless controller set too low

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

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

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

Inlet filters or check valves blocked

Check and remedy, refer to "maintenance"

Outlet hose or handset blocked

Check and remedy

Reversed inlet supplies

Check and remedy

Hot inlet water supply temperature is too cool

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

Insufficient quantity of stored hot water

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

Inlet water supply pressures are unstable or imbalanced

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

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

Refer to "Use of Flow Regulators" for correct operation

Outlet pipe run is too long

Ensure outlet pipe work is thermally lagged.

Digital Mixer valve box or Wireless Controller failure

Contact Kohler Mira Ltd

45

1212373-W2-D

Symptoms

Probable Cause

Possible Remedy

Shower temperature too hot or fluctuates

Temperature adjustment on wireless controller set too high

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

Hot inlet water supply temperature is too hot

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

Inlet filters or check valves blocked

Check and remedy, refer to `Maintenance'

Combination boiler cutting inand out (HP/Combi valve only) causing blend temperature fluctuations

Refer to "Use of Flow Regulators" for correct operation

Inlet water supply pressures are unstable or imbalanced

Ensure the water suppply pressures are stable and nominally equal, refer to `Specifications'

Shower temperature affected by the use of adjacent hot/ cold tap. Insufficiently sized pipework to feed both Digital Mixing Valve and taps at the same time.

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'

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

Digital Mixer valve box or Wireless Controller failure

Contact Kohler Mira Ltd

1212373-W2-D

46

Symptoms

Probable Cause

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

Possible Remedy
Reduce hot inlet water temperature to between 55°C and 65°C, refer to "Specifications"

Internal Leaking

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

Refer to "Use of Flow Regulators" for correct operation

Cold inlet water supply pressure too low or fluctuating

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

Cold inlet water supply failure Check and remedy

Inlet filters or check valves blocked

Check and remedy, refer to "Maintenance"

Digital Mixing valve air locking

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

Reversed inlet supplies

Check and remedy

Digital Mixer valve box failure
Pumped Gravity LP valve fitted to a HP/Combi water system

Contact Kohler Mira Ltd
Pumped Gravity LP valves are not suitable for connection to HP/Combi water systems, refer to "typical suitable installation"

Digital Mixer valve box failure Contact Kohler Mira Ltd

47

1212373-W2-D

Symptoms

Probable Cause

Possible Remedy

No shut off / Continuous flow / Shower Fitting Drain Down

Natural drain down of shower fittings
Loss of / or poor radio communications (out of range symbol maybe illuminated on wireless controller).

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

Noise

Digital Mixer valve box failure Digital Mixing valve air locking
Water Hammer
Amplified acoustic noise from the pump due to structure of wall or flooring mounting
Digital Mixer valve box failure

Contact Kohler Mira Ltd
Check for correct installation practices, repeat commissioning procedure and rearrange pipework to avoid airlock forming, refer to "Typical Suitable Installations"
Ensure all pipework is securely fixed, refer to "Installation"
The type of wall or flooring the appliance is fixed to will affect the perceived noise level; solid walls will provide a quieter operation.
Contact Kohler Mira Ltd

1212373-W2-D

48

MAINTENANCE
General
Read the section "Important Safety Information" first. 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 fittings. These finishes 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 flow regulator is refitted in hot supply.
Isolate the electrical and water supplies to the Digital Mixer Valve, and open an outlet fitting 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 filters.
Use flat blade screwdriver to carefully lever cartridges out.
Remove filters and clean or renew.

Refit seals, pipes and plastic nuts. Plastic nuts require hand tightening only. Restore water supply and electrical supply. Test shower and check for leaks.

49

1212373-W2-D

SPARE PARTS
Digital Mixer - High Pressure / Combi Valve
B (x 7)

1796.139 Mains Cable

1666.223 Aerial
1796.140 Control PCB

1664.123 Stepper Motor Extension Lead
1664.123 Solenoid Extension Lead

1666.210 Thermistor
B
A

1796.143

Mixing Valve &

Outlet 2 Assembly

A

1666.209

Inlet Cartridge

+ Filter (x1)

1666.199 Inlet/Outlet Connector (x1)

A

A

1666.215 Flow Regulator

1666.212 Seal Pack - Components Identified `A' 1666.213 Screw Pack - Components Identified `B'

1212373-W2-D

50

1666.225 Push Fit Isolator

Digital Mixer - Pumped Valve

B (x7)

1796.139 Mains Cable

1796.136 Solenoid Cable

1666.224 Aerial

1666.198 Outlet Tube (x1)

1796.137 Control PCB
C
A, C 1666.194 Transfer Tube

1666.196 Outlet Clamp
A, D D

1666.210 Thermistor

1666.192 Mixing Valve Assembly Includes: 166.199 (x3) 1666.209 (x2) 1666.210 (x1)

1666.209 Inlet Cartridge + Filter (x1)
1666.199 Inlet/Outlet Connector (x1)

1666.195

A

Pump Assembly

A

1666.225 Push Fit Isolator

1666.212 Seal Pack - Components Identified `A' 1666.213 Screw Pack - Components Identified `B' 1666.197 Solenoid - Components Identified `C' 1796.138 2nd Outlet Solenoid - Components Identified `D'
51

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Shower Fittings - Showerhead

1688.195 Supply Tube
1688.187 Slide Bar Support 1688.196 Pipe Connection Pack
450.20 RAC Pack

1688.194 Chrome Supply Tube
1688.191 A Upper Support
A

1688.193 Slide Bar

1688.185 Clamp Bracket

1799.015 Ceiling Plate

1688.201 360M Showerhead

1688.163 Storm Assembly

1688.167

B

Burst

Assembly

B

1688.165 Cloud Assembly
1688.282 Checkvalve

B
1688.161 Rain Assembly

1595.035 RAC Shroud

1603.104 Shower Hose

1688.198

A

Wall Spacer (x2)

1688.187

Slide Bar

A

Support

632.73 Hose Washer (x2)

A
1688.312 Installation Template

1688.184 Seal and Screw Pack - Components Identified `B'. 1688.190 Classic Fittings Component Pack - Components identified `A'.

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52

Shower Fittings - Deluge Head

1688.196 Pipe Connection Pack
1799.015 Ceiling Plate

1799.014 Ceiling Mount Plate

1656.132 Concealing Shroud
1799.009 Rigid Arm

1688.194 Chrome Supply Tube
1799.013 Brazed Pipe

1656.131 Backplate Assembly
1799.008 250mm Deluge Head (Chrome)
1799.016 Deluge Fittings Component Pack

Digital Mixer - User Interface
1742.062 Backplate (Includes Screws & Wallplugs)

1742.090 Wireless Controller

1742.061 Battery Cover (Includes Screws)
53

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DISPOSAL AND RECYCLING
End of Product Life
When this appliance 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.
Batteries
Spent batteries should not be disposed of with normal household waste. Contact your local authority for information on waste disposal and recycling.
This symbol on the product or its packaging indicates that this product should not be disposed of with your other household waste. Instead, it is your responsibility to dispose of your waste equipment by handing it over to a designated collection point for the recycling of waste electrical and electronic equipment. The separate collection and recycling of your waste equipment at the time of disposal will help to conserve natural resources and ensure that it is recycled in a manner that protects human health and the environment. For more information about where you can drop off your waste equipment for recycling, please contact your local council office, your household waste disposal service or the shop where you purchased the product.

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54

NOTES

55

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CUSTOMER SERVICE

Guarantee Your product has the benefit of our manufacturer'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 0800 5978551 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 fittings 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 filters) 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 modified by persons not authorised by us or our appointed representative.
 Routine maintenance or replacement parts to repaired or modified by persons not authorised by comply with the requirements of theTMV2 or repaired or modified 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 fixed price service repairs. To Contact Us: UK 0844 571 5000 Calls cost 7p per minute plus your phone company's access charge Fax: 01242 282595
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: [email protected]

Mira is a registered trade mark of Kohler Mira Limited.
The company reserves the right to alter product specifications without notice.
14648

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© Kohler Mira Limited, September 2016


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