Mira DM Pumped, Dm, BSDM Installation Manual

1

These instructions are to be left with the user

Installation and User Guide

Mira Digital Mixer

2

Contents

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

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

Recommended Usage..........................................................................3

Patents .................................................................................................3

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

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

Specications .......................................................................................... 7

Installation .............................................................................................10

General...............................................................................................10

Typical Suitable Installations for DM and BSDM ................................ 11

Typical Suitable Installations for DM Pumped .................................... 14

Installation Schematic ........................................................................15

Power Supply Unit ..............................................................................18

Digital Mixer........................................................................................19

Operation ...............................................................................................23

Commissioning .....................................................................................23

Fault Diagnosis ......................................................................................23

Maintenance ...........................................................................................25

General...............................................................................................25

Cleaning .............................................................................................25

Checkvalve Cartridges - Removal and Installation.............................25

Spare Parts ............................................................................................27

Accessories ...........................................................................................30

Customer Services ................................................................................ 31

If you experience any difculty with the installation or operation of your new digital

mixer, please refer to ‘Fault Diagnosis’, before contacting Kohler Mira Ltd. Our
contact details can be found in section: ‘Customer Services’.

3

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 Digital Mixer (DM) is designed to be used with the Mira Magna water delivery
systems.

The Bath Shower Digital Mixer (BSDM) is designed to be used with the Mira Magna
bath shower mixer 1 or 2 control.

Products Covered by this Guide

Mira Digital Mixer (DM)

Mira Digital Mixer, Pumped Version (DM Pumped)

Mira Bath Shower Digital Mixer (BSDM)

Guarantee

For domestic installations, Mira Showers guarantee the Mira Digital Mixer against
any defect in materials or workmanship for a period of ve years from the date of

purchase (shower ttings for one year).

For non-domestic installations, Mira Showers guarantee the Mira Digital Mixer
for a period of one year from the date of purchase.

For terms and conditions refer to section: ‘Customer Services’.

Recommended Usage

Domestic

ü

Light Commercial

ü

Heavy Commercial

û

Healthcare

û

Patents

Patents:

UK: 2 392 225, 2 421 297

Patent Applications:

UK: 2 437 891
Australia: 2006207367
China: CN101133373A
Euro: 03254070.0, 06702758.1
Int. Pat. App: WO 2006/0077396
PCT/GB/2006/000159 Canada, India, Japan
USA: 2007-0221740-A1, 2008-0112843-A1

4

Important Safety Information

Installation must be carried out in accordance with these instructions, and must be

conducted by designated, qualied and competent personnel.

Warning!

Follow all warnings, cautions and instructions contained in this guide, and
on or inside the appliance.

1. THIS APPLIANCE MUST BE EARTHED. MAKE SURE SUPPLEMENTARY

BONDING COMPLIES WITH THE “REQUIREMENTS FOR ELECTRICAL
INSTALLATIONS”.

In accordance with the current edition of ’The Plugs and Sockets etc. (Safety)

Regulations’ in force at the time of installation, this Mira Digital Mixer is

intended to be permanently connected to the xed electrical wiring of the

mains system.

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. Mains connections are exposed when the cover is removed.

5. Make sure that any pipework that could become frozen is properly

insulated.

6. Having completed the installation, make sure that the user is familiar with the
operation of the appliance.

7. Make sure that this guide is left with the user.

8. DO NOT commission this appliance if water leaks from the unit.

9. Only Mira recommended outlet ttings should be used.

10. Make sure all electrical connections are tight, to prevent overheating.

11. This product is not suitable for areas with high humidity (i.e. steam rooms).

Please consult your installer.

5

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 - Part 7,

or any particular regulations and practices, specied by the local electricity

supply company.

3. The plumbing installation must comply with the requirements of UK Water
Regulations/Bye-laws (Scotland), Building Regulations or any particular

regulations and practices, specied by the local water company or water

undertakers.

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

5. Anyone who may have difculty understanding or operating the controls of

any shower should be attended whilst showering. Particular consideration

should be given to the young, the elderly, the inrm, the disabled, anyone

who suffers from a medical condition that can result in temporary incapacity
(e.g. epilepsy or blackouts) or anyone inexperienced in the correct operation
of the controls.

6. Sunburn or skin conditions can increase your sensitivity to hot water. Make
sure that you set the shower to a cooler temperature.

7. If any of the following conditions occur, isolate the electricity and water supplies
and contact Customer Services.

• If the cover is not correctly tted 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.

• DO NOT operate if water leaks from the appliance.

• DO NOT operate this appliance if it is frozen. If suspected of being

frozen, isolate and contact us for advice.

8. 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.

6

Pack Contents Checklist

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

that the parts are included.

Documentation

q 1 x Installation Template (marked on packaging)
q 1 x Guarantee Registration Document

q 1 x Power Supply Unit (PSU)

q 3 x 15 mm Compression Nuts and Olives

q 4 x Fixing Screws and Wall Plugs

q 1 x Ferrite (2 x Ferrites Mira BSDM model only)

q 1 x Light Green Flow Regulator
q 1 x Dark Green Flow Regulator

q 6 x Rubber Feet

q 2 x Fixing Screws and Wall Plugs

q 1 x Cable Cover Retaining Screw

q 1 x 22 mm Compression Nut and Olive (Mira BSDM model only)

q 1 x Mira Digital

Mixer (DM)

q 1 x Mira Digital

Mixer, Pumped Version
(DM Pumped)

q 1 x Mira Bath Shower

Digital Mixer (BSDM)

OR OR

7

Specications

Standards and Approvals

These Mira Digital Mixers comply with all relevant directives for CE marking.

These Mira Digital Mixers are type 1 electronic, independently mounted controls for
surface mounting.

General

Pollution Degree 3

Rated Impulse Voltage Mains Supply - 2.5 kW

12 Vdc supply to valve - 500 V

Suitable for Drinking Not Suitable

Connections 15 mm Compression (22 mm Bath)

Pressures

Maximum Static Pressure

DM Pumped

BSDM

1000 kPa (10 bar)
100 kPa (1 bar) = 10 m max. total head
1000 kPa (10 bar)

Maximum Maintained Pressure

DM Pumped

BSDM

500 kPa (5 bar)
100 kPa (1 bar) = 10 m max. total head
500 kPa (5 bar)

Minimum Maintained Pressure

DM Pumped

BSDM

50 kPa (0.5 bar)
1 kPa (0.01 bar) = 0.1 m min. total head
50 kPa (0.5 bar)

Supply Pressure Differential Nominally Equal

Temperatures

Maximum Temperature (factory pre-set) 45°C (shower), 46°C (bath)

Maximum Temperature (setting range) 36°C - 48°C

Minimum Temperature Thermostatic control down to 30°C:

(Position 2 on Water Delivery System dial),
Full Cold also selectable:
(Position 1 on Water Delivery System dial)

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

DM

DM

DM

8

Shower Flow Rates

DM DM Pumped BSDM

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

7 L/Min
12 L/Min
18 L/Min

9 L/Min
12 L/Min
16 L/Min

7 L/Min
12 L/Min
18 L/Min

Bath Flow Rates

DM DM Pumped BSDM

Nominal Flow Rates (will vary depending on
inlet maintained pressure and spout kit)
Low
High

n/a
n/a

n/a
n/a

11 L/Min
18 L/Min

Electrical

DM DM Pumped BSDM

Supply Voltage 100 - 240 V

RMS, 50 - 60
Hz

230 V ± 10%,
RMS 50 Hz

100 - 240 V
RMS, 50 - 60
Hz

Maximum Load 35 W at 12

VDC

200 W at 230
V AC

35 W at 12
VDC

Fuse 3 AMP Fused

Supply

3 AMP Fused
Supply

3 AMP Fused
Supply

Duty Cycle n/a Continuously

Rated

n/a

9

511 mm

33 mm

44 mm

86 mm

458 mm

View from Side A

96 mm

118 mm

172 mm

188 mm

A

55 mm 90 mm

168 mm

Dimensions

Note! Outlet conguration

will vary depending on
model

10

Installation

General

The installation must be carried out in accordance with these instructions, and must

be conducted by designated, qualied and competent personnel.

The installation must comply with any particular regulations and practices, specied

by the local water supply regulations.

The product may be installed in a loft space, under the bath or in a convenient
cupboard space providing there is enough room for maintenance (e.g. Removal
of Digital Mixer Lid), failure to do so may result in being unable to carry out
routine maintenance and servicing. Safe and easy access to the installed
product MUST 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.

Inlet and outlet isolating valves MUST be installed close to the Digital Mixer for ease
of maintenance.

► Caution! The Digital Mixer and the Power Supply Unit must be installed in a

dry area where it will not freeze.

11

Typical Suitable Installations for DM and BSDM

Instantaneous Multipoint Water Heaters and Combination Boilers

► Caution! The Mira Digital Mixer, Pumped Version (DM, Pumped) is NOT

suitable and MUST NOT be installed on Instantaneous Multipoint Water
Heaters or Combination Boiler systems.

The Digital Mixer MUST be installed 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 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 make sure

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.

DM BSDM

COLD HOT

Mira Magna
Water Delivery System

Bath Spout

Float Valve Overow Indicator

Pressure
Reducing Valve

Isolating Valve Mini Expansion

Vessel

Tempering Valve

Key to Symbols

12

Use of Warm-up Feature with Combination Boilers

When using the warm-up feature with the Digital Mixer supplied via an instantaneous
water heater/combination boiler the user may experience a brief temperature

uctuation. This is caused by the usual operation of a standard instantaneous water
heater/combination boiler whereby the boiler will turn off when the ow is stopped

(as happens after the warm-up sequence has been completed). Upon restart of the

Digital Mixer a cold shot will be ushed through followed by a brief hot shot until the

hot water supply is stabilised.

Use of Flow Regulators with Combination Boilers

The Digital Mixer can demand more hot water than some instantaneous water
heaters/combination boilers can heat, especially in winter when the mains water is

colder. A ow regulator may need to be used to make sure that the Digital Mixer can
deliver a full range of water temperatures. The table indicates the ow regulator to
be tted in the hot water inlet of the Digital Mixer.

Boiler Rating 24 kW (80,000 Btu/h) 30 kW (100,000 Btu/h) 36 kW (120,000 Btu/h)

Flow Regulator 7.3 litres/min 8.5 litres/min Not required

Colour Dark Green Light Green -

Hot Inlet

Flow Regulator

13

Mains Pressurised Instantaneous Hot Water System, Heated from a Thermal
Store

► Caution! The Mira Digital Mixer, Pumped Version (DM, Pumped) is NOT

suitable and MUST NOT be installed on Mains Pressurised systems.

DM BSDM

COLD

Mira Magna
Water Delivery System

Bath Spout

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).

14

Typical Suitable Installations for DM Pumped

Gravity Fed Systems

► Caution! The Mira Digital Mixer (DM) and Bath Shower Digital Mixer (BSDM)

are NOT suitable and MUST NOT be installed on Gravity Fed systems.

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. It is therefore best practice to have independent hot
and cold supplies to the pumped version of the Mira Magna digital mixer.

Mira Magna
Water Delivery System

1.0 metre minimum

Air Separation

100 mm from the lowest level of
water in the tank

DM Pumped

Cistern Minimum
230 litres

90°

30° - 60°

15

Installation Schematic

Power Supply Unit

Junction Box
(not supplied)

Power Supply Unit

Junction Box (some models)

3 Amp Switched
Fused Spur Box

3 Amp Switched
Fused Spur Box

Suppression Ferrite

Suppression Ferrites

To Mains
Power Supply

To Mains
Power Supply

Note! Metal pipework
must be earth bonded

Note! Metal pipework
must be earth bonded

Hot Inlet

Cold Inlet

Cold Inlet

Outlet

Outlets

Mira Magna Water
Delivery System

Mira Magna Water Delivery
System (Control Panel optional)

Spouts

Mira Magna
BSM Interface

Hot Inlet

Mira BSDM

Mira DM and Mira DM Pumped

Pumped Version
Recommended Method

Pump Power
Supply Cable

16

► Refer to the separate Installation and User Guides for the Mira Magna Water

Delivery System and Spout Kits (where applicable).

► The data cable(s) must be placed through the suppression ferrite(s) and then

looped around the cover. The suppression ferrite(s) must be tted as close to

the Water Delivery System / User Interface as possible.

► The mains supply must be 230-240 V at 50 Hz, connected to the appliance

via a double pole switched 3 Amp fused connection unit (not supplied), with
a minimum 3 mm contact separation gap in each pole.

► Non-restrictive (free owing) inlet and outlet isolating valves MUST be installed

close to the Digital Mixer for ease of maintenance (recommended maximum
300 mm from the product on the inlets) failure to do so may result in being
unable to carry out routine maintenance and servicing.

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

debris at the mixing valve point. 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.

► Pipework dead-legs should be kept to a minimum.

► Supply pipework layout should be arranged to minimise the effect of other

outlet usage upon the dynamic pressures at the mixing valve inlets.

► Inlet and outlet threaded joint connections should be made with PTFE tape or

liquid sealant. Do not use oil-based, non-setting joint compounds.

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

through before connection to the Digital Mixer.

► Duty Cycle (DM Pumped) - the Digital Mixer Pump is continuously rated.

► Maximum hot water range 55°C - 65°C.

► This appliance is intended for permanent connection to the xed electrical

wiring using only Kohler Mira approved PSU and (pumped models) pump
control power loom.

► If the supply cords are damaged, they must be replaced by the manufacturer

or a service engineer.

17

► The Digital Mixer MUST ONLY be installed in the orientations shown below

and mounted on a rigid vertical surface or on top of a rigid horizontal surface.
If the Digital Mixer is installed in a different orientation to those shown, it may
malfunction e.g. cause airlocks, effect the thermal performance and could
cause water ingress.

► Caution! The Digital Mixer MUST NOT be installed in the orientations shown

below.

Cold Inlet

Cold Inlet Cold Inlet

Hot Inlet

Hot Inlet

Hot Inlet

Outlet

Outlet

Outlet

18

Power Supply Unit

► Warning! Turn off the electrical and water supplies before proceeding with the

installation of the Power Supply Unit (PSU). The electricity must be turned off
at the mains and the appropriate circuit fuse removed, if applicable.

► The Power Supply Unit (PSU) can be installed a maximum of 1.5 metres away

from the Digital Mixer. A cable from the PSU connects to the Digital Mixer. The
PSU must be connected to a 3 amp switched fused spur box. The spur box
can be positioned a maximum distance of 3 metres away from the PSU.

► For the Pumped Digital Mixer it is recommended that both Power Supply

cables from the Digital Mixer are connected to the 3 amp switched fuse spur
box via a separate junction box (not supplied). Refer to section: ‘Installation,
Installation Schematic’.

► Put the PSU in the required position and mark the positions of the xing holes.

Drill and plug the xing holes.

► Note! Installers may wish to obtain alternative proprietary 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 PSU in position with the xing screws (supplied).

1.5 m Cable

3.0 m Cable

Junction Box (for Pumped
Version, not supplied)

Cable (for Pumped Version)

3 Amp Switched
Fused Spur Box

Fixing Screws (2 off)

19

Digital Mixer

► Warning! Turn off the electrical and water supplies before proceeding with

the installation of the Digital Mixer. The electricity must be turned off at the
mains and the appropriate circuit fuse removed, if applicable.

► Use the installation template (supplied) to mark the positions of the xing

holes in the required position.

► Drill and plug the xing holes.

► Note! Installers may wish to obtain alternative proprietary 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.

► Make sure that the rubber feet (6 off) are located on the bottom of the digital

mixer.

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

Fixing Screw

Rubber Feet

20

Retaining Clips

Securing Screw

► Press down on the electrical compartment cover lugs to release the retaining

clips.

► Note! The securing screw is supplied separately in the component pack

► Swing the cover up.

► Connect the cable from the PSU to the Digital Mixer and position the

moulded grommet on the PSU cable into the slot of the electrical connection
compartment.

► Connect the cable connection from the water delivery system to the Digital

Mixer and position the moulded grommet on the cable connection into the
slot of the electrical connection compartment.

Cable Connection for the
Water Delivery System

Moulded Grommets

PSU Cable Connection

21

► Close the hinged cover of the electrical connection compartment then t and

tighten the securing screw (if applicable) supplied in the component pack.

► Note! If necessary, carefully push the wires between the grommet and

connector to one side to allow the cover to be secured correctly.

► Note! Make sure that the seal on the hinged cover and the moulded grommets

are secure.

► For the DM and DM Pumped models connect the cable from the water delivery

system to the cable from the Digital Mixer.

► For the DM Pumped model connect the cable from the pump in the Digital

Mixer to the 3 amp fused spur.

► For the BSDM model connect the cables from the water delivery system and

user interface to the cable from the digital mixer via the junction box.

► Note! For all models refer to the separate Installation and User Guides for the

Mira Magna Water Delivery System and Spout Kits (where applicable).

Cable from Digital Mixer

Cable from Control
Interface on Shower
Control

Junction Box

Cable from Junction
Box to Digital Mixer

Cables from
BSM Controllers

BSDM Models Only

22

► Caution! It is essential at this point that the supply pipework is thoroughly

ushedthroughbeforeconnectiontotheDigitalMixer. Failure to do so may
result in product malfunction and will not be covered under the guarantee.

► Connect the hot and cold water supply pipes to the Digital Mixer.

► Caution! The hot and cold inlet connections on the Digital Mixer must be held

securely when the supply pipes are being tightened.

► Connect the outlet pipe(s) to the Digital Mixer.

► Caution! The outlet connection(s) on the Digital Mixer must be held securely

when the outlet pipe(s) are being tightened.

► Restore the hot and cold water supplies and make sure that there are no

leaks.

► Restore the power supply.

Cold Inlet

Hot Inlet

Cold Water Supply

Hot Water Supply

Compression
Nut and Olive

Outlet Feed to the
Water Delivery System

Outlet Feed to
Bath (22 mm)

Outlet Feed
to Shower

Mira DM Mira DM Pumped Mira BSDM

23

Operation

Refer to the Installation and User Guide supplied with the Mira Magna Water Delivery
System for instructions on how to operate the unit.

Commissioning

Refer to the Installation and User Guide supplied with the Mira Magna Water Delivery
System for instructions on how to commission the installation.

Fault Diagnosis

Read the section “Important Safety Information” rst.

The Digital Mixer is one part of an entire plumbing system. The tting of a pump

places additional requirements on the plumbing system. Some systems may require

plumbing modications to allow them to cope with higher ow rates.

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

with the instructions contained in this guide, dif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.

► Note! This is not an extensive list of faults, if you nd a fault that is not listed,

please contact us for assistance.

Most faults can be rectied by checking the following:

► Make sure that the water supply has not been interrupted. The main stopcock

and shower isolating valves should be fully open.

Symptoms Probable Cause Possible Remedy

User interface not illuminated The power supply has been

disabled.
Electrical connections to/from
the Digital Mixer have been
disturbed.

Check and rectify.

Check and make sure
connections are secure.

No ow from the Digital Mixer. The inlet/outlet ttings may be

blocked.
Hot or cold water supply failure.

Check and clean the inlet
strainers.
Reinstate the hot and cold
water supplies.

Only cold water from the Digital
Mixer.

The hot water inlet may be
blocked.
Hot water supply failure.

Check and clean the inlet
strainers.
Reinstate the hot water supply.

(continued)

24

Symptoms Probable Cause Possible Remedy

Fluctuating or reduced ow

rate.

The inlet/outlet ttings may be

blocked.
Water pressure is low.

Fluctuating ow.

Fluctuating water temperature.

Check and clean the inlet
strainers.

Check that the ow rate is

above the stated minimum

(refer to Specications).

Make sure that the dynamic
inlet pressures are within

specications.

Make sure that the inlet
temperatures differentials are

sufcient.

Maximum blend temperature
setting too hot or too cool.

Incorrect maximum
temperature setting.

Refer to the Installation and
User Guide supplied with the
Water Delivery System.

Continuous ow. System will not switch off. Isolate power supply/water

supply and contact Kohler Mira
Limited.

Shower runs for a short time

(30 - 60 seconds) then ow

reduces, splutters or stops.
Aggravated when other hot
taps are in use. Less evident
on full cold.

Air is being sucked down the
vent pipe, as the hot take off to
the shower is too high up the
pipe.

Refer to the system diagrams in
section: ‘Installation’ for correct
connection method. Note the
100 mm take-off dimension.
Consider increasing cold feed
pipe to cylinder to Ø28 mm.

Shower runs cool for a short

time (1 - 2 minutes) then ow

splutters.

Air ingress into hot pipework. Refer to the system diagrams

in section: ‘Installation’.

Flow of water virtually stops
and surges on/off after a few
minutes.

Incorrect storage of cold
water in cistern (230 litres
recommended).

Increase storage of cold water.

Shower runs cold after 5 - 10
minutes.

Incorrect storage of hot water
in cistern.

Increase storage of hot water.

Shower temperature affected
by the use of an adjacent hot/
cold tap.

Insufciently sized pipework

for both systems to be used
together.

Increase pipe sizes or
separately feed shower.
Refer to the system diagrams
in section: ‘Installation’.

Pump does not operate. Electrical supply failure.

Pump PCB failure.

Check power supply.
Renew the PCB.

Pump does not stop. PCB failure. Renew the PCB.

Low or no water ow. Isolating valves closed.

Inlet strainers blocked.

Check valves tted incorrectly.

Appliance sited above cold
water storage cistern.

Plumbing system fault (airlock).

Blocked sprayplate.

Open isolating valves.
Clean strainers.
Refer to section: ‘Maintenance,
Check Valve Cartridges’.
The appliance is not suitable
for negative head installations.
Refer to the system diagrams
in section: ‘Installation’.
Reroute pipework to avoid
airlocks.
Clean sprayplate.

25

Maintenance

General

Read the section ‘Important Safety Information’ rst.

If any maintenance is required then it must be carried out by a competent tradeperson
for whom the maintenance instructions are provided. 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.

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 - 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.

► Isolate the water supply to the Digital Mixer, and open an outlet tting to release

pressure and to assist the draining of residual water.

► Isolate the electrical supply.

► The checkvalve cartridge assembly may be removed for cleaning. Inlet

strainers can be ushed through under a jet of water to remove any lodged

particles.

► Note! Some valves do not have checkvalve cartridge assemblies tted, only

checkvalve and strainers tted.

26

► Lightly wipe external seals of the new checkvalve with a silicone-only based

lubricant to assist in retting.

► Note! The checkvalve cartridge is not a serviceable item, so any apparent

wear or damage will require its renewal.

► Do not overtighten when re-tting checkvalve cartridges. Restore the water

and power supplies and check for leaks.

3

1

4

5

2

Checkvalve
Cartridge Assembly

Checkvalve
Cartridge
Assembly

Checkvalve

Checkvalve

Inlet Adaptor

Inlet Adaptor

Strainer

Strainer

27

Spare Parts

Mira DM

A

463.04

Stepper Motor Assembly

463.93

Stepper Motor
Wiring Loom

1563.704

Valve Assembly

463.43

Wiring Loom

463.29

Solenoid Manifold
(Shower)

463.26

Blanking Plate
Pack

1653.117

Solenoid Tube

463.25

Checkvalve Cartridge
Assy / Filter Pack

463.94

Inlet Adapter

464.04

Inlet Saddle Clamp

464.03

Outlet Saddle
Clamp

463.06

Cable Cover
Pack

463.89

Control PCB

463.83

Power Supply Unit

463.05

Seal and Screw Pack - Components Identied ‘A’

463.28

Internal
Saddle
Clamp

463.95

Outlet Adaptor

A

A

A

A

A

A

A

A

A

A

A

463.08

Single Thermistor Pack

1653.081

Flow Regulator and Ferrite Pack

1618.106

Extension Lead and Connector Box

28

Mira DM, Pumped Version

A

463.04

Stepper Motor Assembly

463.93

Stepper Motor
Wiring Loom

463.03

Valve Assembly

463.26

Blanking Plate Pack

463.25

Checkvalve
Cartridge Assy
/ Filter Pack

463.94

Inlet Adapter

464.04

Inlet Saddle Clamp

464.03

Outlet Saddle Clamp

463.33

Solenoid Manifold
(Pumped)

463.34

Pump and
Motor Assembly

463.06

Cable Cover Pack

463.99

Control PCB

463.35

Pump Control PCB

463.83

Power Supply Unit

463.05

Seal and Screw Pack - Components Identied ‘A’

463.28

Internal Saddle Clamp

463.95

Outlet Adaptor

A

A

A

A

A

A

A

A

A

A

A

A

463.08

Single Thermistor Pack

1653.081

Flow Regulator and Ferrite Pack

1618.106

Extension Lead and Connector Box

29

Mira BSDM

463.05

Seal and Screw Pack - Components Identied ‘A’

A

463.04

Stepper Motor Assembly

463.93

Stepper Motor
Wiring Loom

1563.704

Valve Assembly

463.44

Wiring Loom

463.29

Solenoid Manifold
(Shower)

463.53

Solenoid Manifold
(Bath)

463.26

Blanking Plate
Pack

463.25

Checkvalve
Cartridge Assembly
/ Filter Pack

463.94

Inlet Adapter

464.04

Inlet Saddle Clamp

464.03

Outlet Saddle Clamp

463.06

Cable Cover
Pack

1618.111

Control PCB

463.83

Power Supply Unit

463.28

Internal
Saddle
Clamp

1618.110

Outlet Adaptors

463.08

Single Thermistor Pack

A

A

A

A

A

A

A

A

A

A

A

1653.080

Flow Regulator and Ferrite Pack

1618.106

Extension Lead and Connector Box

1653.117

Solenoid Tube

30

Accessories

Mira Standard Grab Bars
300 mm - 2.1605.070
450 mm - 2.1605.071
600 mm - 2.1605.072

Premium grade, highly polished,
stainless steel grab bars.
Note! Must be installed onto a
solid wall.

Shower Seat
White - 2.1536.128
White/Chrome - 2.1536.129

For use in or out of the showering
area. Folds up when not in use.

Maximum User Weight - 127 kg
(20 stone) Note! Must be installed

onto a solid wall.

Premium Shower Seat
White/Chrome - 2.1731.001
Grey/Chrome - 2.1731.002

Stylish, slim-line and robust
shower seat for use in or outside
of the shower area. Folds up when
not in use. Maximum User Weight

- 150 kg (23.5 stone) Note! Must

be installed onto a solid wall.

Logic Showerhead Holder
White - 2.1605.149
White/Chrome - 2.1605.150

An alternative to the traditional
slide bar. Often a useful addition
when positioned for the smaller
members of the family.

Genuine Mira accessories can be purchased direct from Customers Services (our contact details can
be found on the back cover of this guide) or from approved stockists or merchants.

31

Customer Services

Guarantee

Your product has the benefit of our manufacturer’s
guarantee which starts from the date of purchase.
To activate this guarantee, please return your completed
registration card, visit our website or free phone 0800
0731248 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.
If you have not previously activated the guarantee, you will
be required to do so prior to the provision of assistance.
If you do not activate your guarantee our Engineer will be
entitled to charge full payment for the visit (Call out fee
plus parts).

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

● The product must be installed and maintained in

accordance with the instructions given in this user
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 e xtend the original

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

● For shower fi 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, lack of maintenance, build up
of limescale, frost damage, c orrosion, system debris or
blocked fi 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 loss of any kind.

● Damage or defects caused if the product is repaired

or modifi ed by persons not authorised by us or our
appointed representative.

● Routine maintenance or replacement parts to comply

with the requirements of the TMV 2 or T MV 3 healthcare
schemes.

What to do if something goes wrong

If your product does not function correctly when you fi rst
use it, contact your installer to check that it is installed
and commissioned in accordance with the instructions in
this manual. Should this not resolve the issue, contact our
Customer Services Team who will offer you or your installer
advice and if applicable arrange for a Service Technician to
call. If the performance of your product declines, check in
this manual to see if simple home maintenance is required.
If you require further assistance call our Customer Services
Team.

Extended Guarantees

A selection of protection plans are available that
enable you to cover repair bills for the life of your policy
(excludes Eire). Ring 01922 471763 for more details.

Helpdesk Service

Our dedicated Customer Services Team is comprehensively
trained and can offer help and advice, spare parts,
accessories or a service visit. We will need you to have your
model name or number, power rating (if applicable) and date
of purchase. As part of our quality and training programme
calls may be recorded or monitored.

Mira Showers Website (www.mirashowers.co.uk)

From our website you can register your guarantee,
download additional user guides, diagnose faults, purchase
our full range of accessories and popular spares, refer to
our FAQ’s and request a service visit.

Spares and Accessories

We maintain extensive stocks of genuine spares and
accessories and aim to provide support throughout the
product’s expected life. Payment can be made by phone
at time of order using most major Credit or Debit cards and
we aim to despatch orders within two working days. Items
purchased from us are guaranteed for 12 months from date
of purchase. For safety reasons spares exposed to mains
voltages should only be fi tted by competent persons.
Returns – items can be returned within one month of date of
purchase, providing that they are in good condition and the
packaging is unopened. Please obtain authorisation from
our Customer Services Team before return. We reserve the
right to apply a 15% restocking charge.

Service / Repairs

We have a nationwide team of Service Technicians who can
carry out all service or repair work to your product within the
guarantee period and beyond. You have the assurance of a
fully trained Mira Technician, genuine Mira spare parts and
a 12 month guarantee on any chargeable work done.
Payment should be made directly to the Service Technician
who will accept most major Credit or Debit cards.

To Contact Us
UK
Telephone: [phone]
www.mirashowers.co.uk

E-mail: [e-mail]
Fax: [phone]
By Post: Mira Customer Services Dept, Cromwell Road,
Cheltenham, Gloucestershire, GL52 5EP

Eire
Telephone: [phone]

E-mail: [e-mail]
Fax: Dublin 01 459 2329
By Post: Modern Plant Ltd (Dublin),
Otter House, Naas Road, Clondalkin, Dublin 22

32

U

K

A

S

FM 14648

1103138-W2-E (1503, 1588) (N73H, N78A, N79A) © Kohler Mira Limited, November 2010