Mira Element SLT Bedienungsanleitung

MIRA ELEMENT SLT

INSTALLATION AND USER GUIDE

THERMOSTATIC MIXER

These instructions must be left with the user.

CONTENTS

Introduction 2

Guarantee 3

Recommended Usage 3

Patents and Design Registration 3

Safety : Warnings 3

Pack Contents 4

Exposed Thermostatic Mixer 4

Built-in Thermostatic Mixer 4

Specications 5

Pressures 5

Temperatures 5

Thermostatic Shut-down 5

Connections 5

Flow Rates 5

Dimensions 6

Installation 7

Suitable Plumbing Systems 7

General 7

Exposed Thermostatic Mixer 8

Built-in Thermostatic Mixer 10

Solid Wall or Stud Partition

Fixing using Rear Mountings 10

Panel Fixing using Securing

Brackets 12

Solid Wall or Stud Partition

Fixing using Securing Brackets 13

RAC Assembly 15

Reversed Inlet Supplies 16

Operation 18

Commissioning 18

Maximum Temperature Setting 18

Type 2 Valves 19

Fault Diagnosis 20

Maintenance 21

Spare Parts 23

Exposed Thermostatic Mixer 23

Built-in Thermostatic Mixer 24

RAC Assembly 25

Accessories 26

Notes 27

Customer Service Back Page

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 Element SLT thermostatic mixer is a

thermostatic shower control with a single lever

for on/off and temperature control. A Mid Flow

Overide feature allows up to 30% reduction in

ow at low pressures and a Temperature Overide

warns when moving into a hotter temperature

zone.

A 14 L/Min ow regulator is supplied for high

pressure systems to reduce excessive shower

force.

The thermostatic mixer incorporates a wax

capsule temperature sensing unit, which provides

an almost immediate response to changes in

pressures or temperature of the incoming water

supplies to maintain the selected temperature. An

adjustable maximum temperature stop is provided

which limits the temperature to a safe level.

Inlet lters are tted to protect the thermostatic

cartridge.

Mira Element SLT Exposed: Thermostatic

Mixer for connection to rising, falling or rear entry

pipework, supplied with L14A shower ttings.

Mira Element SLT Built-in: Thermostatic Mixer

for connection to concealed pipework, supplied

with L14D BIV shower ttings or BIR showerhead

arm and deluge head.

These products have been certied as Type 2

valves under the BUILDCERT TMV2 scheme.

They also comply with the Water Supply (water

ttings) Regulations 1999.

If you experience any difficulty with the

installation or operation of your new

thermostatic mixer, please refer to ‘Fault

Diagnosis’, before contacting Mira Showers.

Our contact details can be found on the back

cover of this guide.

Guarantee

For domestic installations, Mira Showers

guarantee the Mira Element SLT 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 Element SLT 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

Application Valve with

Fittings

Domestic ü

Light Commercial ü

Heavy Commercial û

Healthcare û

Patents and Design Registration

Patents:

GB: 2 291 693, 2 392 225, 2 421 297,

2 422 886

Euro: 1 672 257 DE FR GB IT NL SE

USA: 7 240 850

Patent Applications:

GB: 0621637.8, 2 456 271

Euro: 07015846.4

USA: 2006-0124758-A1, 2007-0221740-A1

World: WD 2008/053207

Design Registration:

000555768-0006, 000555768-0007

SAFETY : WARNINGS

Mira thermostatic mixers are precision engineered

and should give continued safe and controlled

performance, provided:

1. They are installed, commissioned, operated and

maintained in accordance with manufacturer’s

recommendations.

2. Type 2 Valves are only used for applications

covered by their approved designations, refer

to section: ‘Type 2 Valves’.

3. Periodic attention is given, when necessary,

to maintain the product in good functional

order.

Caution!

1. Read all of these instructions.

2. Retain this guide for later use.

3. Pass on this guide in the event of change of

ownership of the installation site.

4. Follow all warnings, cautions and instructions

contained in this guide.

5. 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 or anyone inexperienced

in the correct operation of the controls.

6. Rapid/Excessive movement of the ow

and / or temperature control levers may result

in momentary unstable blend temperatures.

7. Care is required when adjusting flow or

temperature, make sure that the temperature

has stabilised.

8. When this product has reached the end of its

serviceable life, it should be disposed of in a

safe manner, in accordance with current local

authority recycling, or waste disposal policy.

PACK CONTENTS

Tick the appropriate boxes to familiarise yourself

with the part names and to conrm that all of the

parts are included.

Exposed Thermostatic Mixer

q1 x Thermostatic Mixing Valve

q2 x Concealing Plates

q2 x Compression Nuts

q3 x Compression Nuts

q3 x Olives

q2 x Olives

q2 x Wall Plugs

q6 x Wall Plugs

q2 x Fixing Screws

q6 x Fixing Screws

q1 x 2.5 mm Hexagonal Key

q1 x Multi Tool

q1 x 14 L/Min Flow Regulator

q2 x Securing Brackets

q4 x Bracket Securing Screws

q2 x M5 x 40 mm

Securing Screws

q1 x RAC Assembly

(BIV models only)

Not Illustrated

Documentation

q1 x Guarantee Registration Document

q1 x Installation Template

Built-in Thermostatic Mixer

q1 x Thermostatic Mixing Valve

(attached to the building-in shroud)

q1 x Control Assembly

Documentation

q1 x Guarantee Registration Document

q1 x M4 x 8 mm

Hexagonal Screw

SPECIFICATIONS

For Type 2 Valves, the supply conditions specied

in section: ‘Type 2 Valves - Application’ take

precedence over the operating parameters which

follow.

Pressures

• Max Static Pressure: 10 Bar.

• Max Maintained Pressure: 5Bar.

• Min Maintained Pressure (Gravity System):

0.1 Bar (0.1 bar = 1 Metre head from cold

tank base to showerhead outlet).

• Note! For gravity fed or other low pressure

systems (0.5 bar or below) do not t the

outlet ow regulator.

• For optimum performance supplies should

be nominally equal.

Temperatures

• Factory Pre-set (Blend) Shower: 41°C.

• Note! Due to variations in site conditions

the maximum temperature may need

adjustment.

• Temperature Overide set at 5°Cbelow Factory

Preset.

• Optimum Thermostatic Control Range: 35°C

to 43°C (achieved with supplies of 15°C cold,

65°C hot and nominally equal pressures).

• Recommended Hot Supply: 60°C to 65°C

Note! The mixing valve can operate at

higher temperatures for short periods without

damage, however this could detrimentally

affect thermostatic performance. For safety

and performance reasons it is recommended

that the maximum hot water temperature is

limited to 65°C.

• Cold Water Range: up to25°C.

• Minimum Recommended Differential between

Hot Supply and Outlet Temperature: 12°C.

Thermostatic Shut-down

• For safety and comfort the thermostat will

shut off the mixing valve within 2 Seconds if

either supply fails (achieved only if the blend

temperature has a minimum differential of

12°C from either supply temperature).

Connections

• Inlets: 15 mm Compression.

• Outlet: ½” BSP Flat Face / 15 mm

Compression

• Standard connections are: hot - left, cold -

right, outlet - bottom (EV models), top (BIV

and BIR models).

Flow Rates

Typical ow rates on high pressure systems (1 to

5 Bar) with 14 L/Min ow regulator tted - Mira

Element SLT with L14A Shower Fittings.

Typical ow rates on low pressure systems

(0.1 to 1 Bar) without ow regulator tted - Mira

Element SLT with L14A Shower Fittings

0.511.522.5

Supply Pressure (bar)

33.5 4 4.

Flow Rate (l/min)

Supply Pressure (bar)

Flow Rate (l/min)

Supply Pressure (bar)

Flow Rate (l/min)

All dimensions in mm

Built-in Thermostatic Mixer

153

Ø56

116

142

Ø62

Ø183

108

59 - 80

Building-in Depth

45 - 56

Exposed Thermostatic Mixer

Dimensions

INSTALLATION

Suitable Plumbing Systems

Gravity Fed:

The thermostatic mixer must be fed from a cold

water cistern (usually tted in the loft space) and

a hot water cylinder (usually tted in the airing

cupboard) providing nominally equal pressures.

Mains Pressurised Instantaneous Hot Water

System (Combination Boiler):

The thermostatic mixer can be installed with

systems of this type with balanced pressures.

(Recommended Minimum Maintained Pressure:

1.0 Bar).

Unvented Mains Pressure System:

The thermostatic mixer can be installed with an

unvented, stored hot water system.

Pumped System:

The thermostatic mixer can be installed with an

inlet pump (twin impeller). The pump must be

installed in a suitable location and in accordance

with its instructions.

General

Installation must be carried out in accordance

with these instructions, and must be conducted by

designated, qualied and competent personnel.

The installation must comply with the “Water

Supply Regulations 1999 (Water Fittings)” or any

particular regulations and practices, specied by

the local water company or water undertakers.

Note! Make sure that all site requirements

correspond to the information given in section:

‘Specications’. For Type 2 Valves see also

supply conditions in section: ‘Type 2 Valves’.

1. The Mixer must not be installed in an area

where it may freeze.

2. For stud partitions alternative xings may be

required.

3. Isolating valves must be installed close to the

Mixer for ease of maintenance.

4. Pipework must be rigidly supported and avoid

any strain on the connections.

5. Pipework dead-legs should be kept to a

minimum.

6. Decide on a suitable position for the Mixer.

The position of the Mixer and the Shower

Fittings must provide a minimum gap of 25 mm

between the spill-over level of the shower tray/

bath and the showerhead (refer to illustration).

This is to prevent back-siphonage. For further

information on the installation of your Shower

Fittings, refer to the Fittings Installation and

User Guide.

Note! Only use Shower Fittings recommended

by the manufacturer or supplier.

25 mm Spill

Over Level

Hose Retaining

Soap Dish

Exposed Thermostatic Mixer

Installing the Thermostatic Mixer

1. The thermostatic mixer can be installed with

rear, rising or falling supply inlets. Decide

on the most appropriate method for your

installation and if necessary, loosen the

grubscrews and rotate the inlet elbows to

suit.

Important! Make sure that the elbows are

pushed fully onto the mixer before tightening

the grubscrews, do not overtighten.

2. Use the installation template to mark the

positions of the holes for the backplate and

the pipe centres.

For rising or falling supplies the pipe positions

should be set 35 mm from the centre of pipe

to the nished wall at 153 mm centres.

Note! Allow a minimum of 150 mm either side

of the mixer to allow servicing of the hot and

cold inlet lters.

Allow a minimum of

150 mm either side

of mixer to wall

35 mm

3. For solid walls drill the holes for the backplate

with a 6 mm diameter drill and insert the wall

plugs.

Note! For other types of wall structure

alternative fixings may be required (not

supplied).

Wall Plug

4. For Rear Entry Supplies Only:

a) Drill the holes for the supply pipes at

153 mm centres.

b) Recess the inlet holes Ø32 mm x 10 mm

deep to allow for the concealing plates.

Note! Depth must be sufcient to prevent

the concealing plates fouling on the

plumbing elbows.

5. Fit the supply pipework: Hot - Left, Cold

- Right. For rear entry supplies the inlet

pipework should extend 18 mm from the

finished wall surface, for rising or falling

supplies the centre of the pipe should be set

35 mm from the nished wall surface.

Note! If it is not possible to install the mixer

with this pipework conguration complete the

installation then refer to section: ‘Reversed

Inlet Supplies’.

Ø6 mm Drill

10 mm minimum

between elbow

and nished wall

surface

Ø32 mm

18 mm from nished

wall surface

Elbow

Recess Ø32 mm

x 10 mm deep

18 mm

153 mm

HOT

COLD

14. Fit the shower ttings, refer to your shower

fittings installation and user guide for

instructions.

Note! For high pressure systems (above

0.5 bar) make sure that the ow regulator

(supplied) is tted inside the outlet nipple (refer

to illustration).

Important! The tting of this ow regulator will

invalidate any TMV2 low pressure compliance

due to the minimum ow rate requirements. Do

not t the ow regulator in TMV2 low pressure

applications.

15.Turn on the hot and cold water supplies and

check for leaks.

16.Before using the shower, refer to section:

‘Commissioning’.

6. Remove the backplate from the mixer by

loosening the grubscrew with a 2.5 mm

hexagonal key.

7. Secure the backplate to the wall using the

screws.

8. For Rear Entry Supplies Only:

Fit the concealing plates over the inlet pipes.

Note! Apply silicone sealant to the back face

of the ange.

Apply Silicone Sealant

Concealing Plate

9. Caution! It is essential at this point

that the supply pipework is thoroughly

ushedthroughbeforeconnectiontothe

mixer. Failure to do so may result in product

malfunction and will not be covered under the

guarantee.

10.Fit the compression nuts and olives onto the

pipework.

11. Align the mixer with the pipework and t onto

the backplate.

12.Tighten the compression nuts onto the mixer

with a suitable spanner.

Caution! Take care not to damage the chrome

surfaces.

13.Tighten the grubscrew to secure the mixer to

the backplate.

Note! Make sure that the ow regulator (supplied)

is tted inside the outlet nipple in the orientation

shown.

Flow Regulator

Built-in Thermostatic Mixer

Solid Wall or Stud Partition Fixing

using Rear Mountings

1. Determine the route for the hot and cold supply

pipework and for the outlet pipework. When

connecting to the BIV Shower Fittings it is

recommended that the outlet be positioned

above and to one side of the mixer. This is to

prevent the exible hose from obstructing the

shower controls.

2. Remove the two shroud screws then remove

the building-in shroud from the mixer.

Note! Ret the shroud screws to the mixer.

3. Determine the position of the mixer and draw

around the building-in shroud.

4. Mark the routes for the supply pipework at

108 mm centres (Hot - Left, Cold - Right).

Falling Supplies: For falling supplies loosen

the grubscrew on each elbow using the 2.5 mm

hexagon key (supplied). Remove the elbows

and install on opposite sides. Retighten the

grubscrews.

Caution! Do not overtighten.

Note! Make sure that the ‘O’ seals are correctly

tted and that the lter caps can be accessed

from the front (i.e. hexagonal key facing

forward).

Finished Wall

Surface

Finished Wall

Thickness

Depth ‘X’

Rear

Mounting

Finished Wall Thickness

(e.g. tile and adhesive)

Wall Cutout Depth

‘X’

4 mm 76 - 55 mm

6 mm 74 - 55 mm

8 mm 72 - 55 mm

10 mm 70 - 55 mm

12 mm 68 - 55 mm

14 mm 66 - 55 mm

16 mm 64 - 55 mm

18 mm 62 - 55 mm

20 mm 60 - 55 mm

5. Cut away the plasterboard and/or brick work

to the required depth.

Important! This depth ‘X’ will depend on the

nished wall thickness e.g. tiles or facia board.

Refer to the table for this measurement.

For stud partitions depth ‘X’ refers to the

distance from the rear mounting e.g. timber

noggin, to the front of the wall (before tiling).

Outlet Pipe BIR

Outlet Pipe BIV Outlet Pipe BIV

Cold InletHot Inlet

Thermostatic

Mixer

Alternative Pipe

Layouts

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