MX Group Atmos Fusion Fitting Instructions Manual

Atmos Fusion

Thermostatic Concentric

Mixer Valve with Riser Rail

Fitting Instructions

IMPORTANT!

This Step-by-Step guide should be retained after installation.

1. INTRODUCTION

This booklet contains all the necessary fitting and
operating instructions for your MX Thermostatic bar
mixer shower.

pressure. The mixer valve must not be subjected to
water temperatures above 80˚C. This mixer valve is
also suitable for thermal storage, unvented systems
and pumped gravity systems.

Please read these instructions carefully. Read
through the whole of this book before beginning your
installation.

IMPORTANT: Before installing with a gas
instantaneous water heater, make sure it is capable
of delivering hot water at a minimum switch-on flow

The shower installation MUST be carried out by a

rate of 3 litres per minute.

suitably competent person in the sequence of this
instruction book, after reading the instructions.

At flow rates between 3 and 8 litres per minute,
the appliance must be capable of raising the water

Care taken during the installation will provide a long

temperature to a minimum of 52˚C.

and trouble free life from your shower. For the best
performance within the specified running pressure
range a minimum flow of 5 litres per minute should
be available on both inlets.

The water temperature at the inlet to the mixer valve
must remain relatively constant when flow rate
adjustments are made (refer to the water heater
operating manual to confirm compatibility with this

This mixer valve is designed to operate on higher

mixer valve).

pressure systems up to a maximum of 5 bar running

2. TOOLS REQUIRED (NOT SUPPLIED)

NOTE: Additional plumbing tools and fittings may be required.

Spanner / Wrench Tape Measure Screwdriver

HB

Pencil Power Drill Suitable Drill Bits

Silicone

Silicone Sealant Spirit Level Safety Eyewear

3. PACK CONTENTS

Please make sure ALL components are
included before starting the installation.

Description Quantity

Concentric Mixer Valve 1
6 Mode Handset 1
Curved Riser Rail 1
Riser Rail Fixing Brackets 2
Handset Height Adjuster 1

1.5m Hose + Washers 1

Concealing Plate 1
Wall Outlet 1

Nut Covers 2
Filter Washers 2
Hose Retaining Ring 1
10mm Allen Key 1
Pressure Balance Kit 1
Screw Pack (2 screws + 2 plugs) 1
Fitting Instructions 1
TMV Registration Card 1

• Riser Rail Bracket

• Riser Rail

• 6-Mode Handset

• Handset Height
Adjuster

• Concentric
Mixer Valve

• Wall Outlet

• 1.5m Shower

Hose + Washers

Concealing Plate Wall Outlet

Nut Covers Hose Retaining Ring Filter Washers

Allen Key Pressure Balance Kit Screw Pack

Fitting Instructions

IMPORTANT!

This Step-by-Step guide should be retained after installation.

Fitting Instructions and

TMV Registration Card

4. PLEASE READ THIS IMPORTANT SAFETY INFORMATION

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Products manufactured by the MX Group are safe and without risk provided
they are installed, used and maintained in good working order in accordance
with our instructions and recommendations.

Layout and sizing of pipework MUST be such that when other services
are used, pressures at the shower control inlets do not fall below the
recommended minimum.

DO NOT choose a position where the shower could become frozen.

DO NOT connect this mixer valve to any form of tap or fitting not
recommended by the manufacturer.

Conveniently situated service valves in each inlet supply MUST be fitted
as an independent method of isolating the shower should maintenance or
servicing be necessary, these valves SHOULD NOT restrict the flow.

DO NOT operate the shower outside the recommended temperatures and
pressures stated in this guide.

Always test the water temperature with your hand before entering the
shower.

NOTE: As a competent person installing this shower you should ensure
that all users are very conversant in its operation.

The British Burns Association recommends 37˚C to 37.5˚C as a
comfortable bathing temperature for children. In premises covered by the
Care Standards Act 2000, the maximum mixed water outlet temperature is
41˚C.

Metal surfaces on the hot supply may become hot during operation.

Arrange to have the mixer valve regularly serviced by a suitably qualified
person.

The handset must be regularly cleaned to remove scale and debris.

5. SITE REQUIREMENTS

The installation must be in accordance with Water
Regulations Advisory Service (www.wras.co.uk).

Minimum running water pressure: 0.1 bar, but will
operate better at a minimum of 0.5 bar.

Maximum running water pressure: 5 bar. Maximum
static water pressure: 10 bar.

For your shower to perform well you should ensure
that the pressure is as specified and a minimum flow
of 5 litres per minute is available at both hot and cold
inlets.

If the water supply is fed by a gravity system then
the supply pressure should be verified to ensure the
conditions of use are appropriate for the valve.

NOTE: Water Regulations requires the handset to
be ‘constrained by a fixed or sliding attachment so
that it can only discharge water at a point not less
than 25mm above the spill over level of the relevant
bath, shower tray or other fixed appliance’. A double
check valve, or similar, MUST be fitted in the supply
pipe work to prevent back-flow.

The pressure at both the hot and cold water
supplies to the mixer valve should be the same,
and the installer should ensure that the flow is not

affected by other taps elsewhere in the house. It is
very important that for use in any mains pressure
systems an expansion tank and a pressure reducing
valve has been fitted to ensure the pressure does
not exceed 5 Bar.

This should be confirmed by the installation
engineer or competent person before installation.

WATER TEMPERATURE REQUIREMENTS

Maximum hot water temperature = 80°C,
Recommended maximum = 65°C.

Minimum hot water temperature = 55°C

Maximum cold water temperature = 20°C

TEMPERATURE ADJUSTMENT RANGE

The mixed water temperature can be adjusted from
cold through to hot. There is a safety stop preset at a
set temperature of about 38°C. Always test the water
temperature prior to using the shower.

In the event of failure of cold water system, the mixer
valve automatically reduces the flow of hot water to
prevent scalding. It will only operate again once the
flow of cold water has been resumed.

6. SITING OF THE MIXER VALVE

Position the mixer valve so that all controls can be
comfortably reached whilst using the shower.

The height of the showerhead should suit all user’s
requirements. When suspended from the hose
retaining ring, the showerhead should be a minimum
of 25mm above the spillover level of the bath or
shower tray.

NOTE: Easily accessible suitable service valves
(complying with Water Regulations Advisory
Service www.wras.co.uk), MUST be fitted as close
as practical to the valve, on the hot and cold water
supplies to the shower as an independent means
of isolating the water supplies should maintenance
or servicing be necessary. These valves should not
restrict the flow.

Height of
showerhead
to suit user’s
requirements

25mm
minimum

Spillover

level

Outline of bath or

shower tray