MX Atmos Select Serie User manual

INSTALLATION & OPERATING
INSTRUCTIONS
Atmos Select
(3 Way Thermostatic Concentric Mixer Valve
with Riser Rail & Overhead)
Customer Care - 0845 505 2211
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1
INTRODUCTION
This book contains all the necessary fitting and operating instructions for your MX thermostatic
mixer shower.
Please read these instructions carefully. Read through the whole of this book before beginning
your installation.
The shower installation MUST be carried out by a suitably competent person after reading these
instructions.
Care taken during the installation will provide a long and trouble free life from your shower. For
the best performance within the specified running pressure range, a minimum flow of 5 liters per
minute should be available on both inlets.
This mixer valve is designed to operate on most water systems found up to a maximum of 5
bar running pressure. The valve must not be subjected to water temperatures above 80°C. This
mixer is also suitable for thermal storage, unvented systems and pumped gravity systems.
IMPORTANT: Before installing with a gas instantaneous water heater, make sure it is capable
of delivering hot water at a minimum switch-on flow rate of 3 liters per minute. At flow
rates between 3 and 8 liters per minute, the appliance must be capable of raising the water
temperature to a minimum of 52°C.
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 mixer shower).
Inlet connections are female ¾ BSP threads which can be connected to 15mm or 22mm
compression fittings (not included).
SAFETY WARNINGS
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.
The handset must be regularly cleaned to remove scale and debris.
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.
NB: As a competent person installing this shower you should ensure that all users are
very conversant in it’s operation.
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2
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 valve needs to be set so 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.
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, (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 liters per minute is available at both hot and cold inlets.
If a water supply is fed by a gravity 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 pipework 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 cleared by the installation
engineer 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 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.
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3
INSTALLATION
Before proceeding with the installation check all the components in the component list are
present.
WARNING!
The shower must not be positioned where it will be subject to freezing conditions
The mixer valve should be fitted only after all the pipework has been installed.
Do not modify or use jointing compounds on any of the pipe fittings. Do not solder fittings near
the mixer valve after it has been connected as heat can damage the valves or seals. Always flush
the system prior to installing the valve.
Before installing, make sure the mixer valve is kept in a clean place to prevent any rubbish etc,
getting into the openings while fitting the pipework.
• The mixer valve is suitable for installation on a solid wall, a stud partition wall, dry lined wall
or fixing to a cubicle or panel.
• The water pipes should be securely attached within the wall or panel to prevent pipe
movement or water noise after installation. The valve should be securely attached to the
wall using the fixing points.
• The mixer valve hot water inlet has a hot next to the inlet and the cold has a cold, the valve
will not operate if connected the wrong way.
• The mixer valve is designed to work at the same hot and cold water pressures. If this is not
the case a flow controller (disc with small holes) can be fitted to the higher pressure supply
to the valve. This is best done by testing each one to find out which gives the best results.
• Remember the mixer valve must installed in such a position that the maintenance of the
TMV and the filters can be done after installation and the commissioning and testing of the
TMV can be undertaken.
SITING OF THE MIXER VALVE
Position the mixer valve so that all controls can be comfortably reached while using the shower.
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.
The supply pipework can be plumbed from above or below but must finish at the suitable
connections, which should be 150mm centers. If installing into a stud partition etc, the pipework
and the valve will need support.
Before fitting the mixer valve flush out the pipework in accordance with Water Regulations
Advisory Service (www.wras.co.uk).
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4
Select Valve with Riser Rail
& Overhead (Square Style)
Atmos Select Square
IMPORTANT
This valve is factory preset so that the control knobs are fitted in the correct location. Do not turn
the shafts until you have fitted the handles after completing installation.
These fitting instructions assume you would wish to have the valve in a configuration such that
the temperature control is at the bottom and the diverter is at the top. You can fit it in any other
configuration you choose but you must make the appropriate amendments to the instructions
yourself. Ensure when changing the configuration of the valve the hot and cold inlets are correctly
connected as stated on the valve.
SITING OF THE SHOWER
Having established the position of the mixer valve so that all controls can be comfortably reached
whilst using the shower, the handset and riser rail should be positioned at the side of the valve
and the overhead rail directly above the valve. Make sure any cables and pipework are not behind
the required screw holes.
Consult the illustration below to make sure you check from the component list that all the parts
for your system are supplied.
Select Valve with Riser Rail
& Overhead (Round Style)
Atmos Select Round
HOT COLD
OFF
Bracket
Select Mixer
Valve
Handset
Double
Interlock
1.5m Hose
Handset
Height Adjuster
Riser Rail
Wall
Outlet
Bracket
Select Mixer
Valve
Handset
Double
Interlock
1.5m Hose
Handset
Height Adjuster
Riser Rail
Wall
Outlet
Overhead
Overhead
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5
PRESSURE BALANCING
Pressure balancing when the feed water pressure is different between hot and cold feeds.
The thermostatic mixer valve is designed to work best when the feed pressures of both hot and
cold water are the same. If there is a difference in pressure it will cause the flow of water through
the valve to pulse rather than being a steady flow. This pulsing can be reduced by putting one
of the metal disks with holes (Fig1-3) into the higher pressure feed to the valve. This restricts
the flow and reduces the pulsing).(Fig 4.) Indicates how to locate and position metal disc. This
restricts the flow and reduces the pulsing).
To maximise the volume of water through the valve the disk with the most holes should be tried
first. If this does not work the others should be tried until a satisfactory result is obtained.
If the water pressures to hot and cold are the same these disks do not need to be used.
NOTE: Do not adjust the centre threaded screw as this is factory set.
FITTING OF THE MIXER VALVE
1. A rectangular hole between approximately 210mm and 110mm should be large enough
to fit the mixer valve. The valve should be fixed to the wall between 75mm and 90mm
below the finished surface of the shower (See Fig 5).
2. The supply pipework can be plumbed from above or below but must finish at the
suitable connections which should be at approximately 150mm centers (See Fig 6),
provision should be made for some adjustment on fitting the valve.
3. Fit a male ¾ BSP elbow to 15mm or 22mm compression (not supplied) to both hot
and cold inlets and the outlets, apply PTFE tape to seal the threads.
NOTE: It is recommended to apply PTFE tape to all threaded connections (boss white or
other sealing compounds are not suitable).
The valve can be used either as a 2 way or a 3 way valve depending on the users
preference, and a blanking nut is provided to blank off one outlet when being used as
a 2 way valve. When using as a 3 way valve, the third outlet may be used for other
accessories which are not supplied.
You should measure the distance between the outlets on the mixer valve you are
fitting to determine the exact distance.
4. At this point you may wish to fit the pipework and the wall arm (See wall arm fitting and
wall outlet) prior to any tiling.
1 2 3 4
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5. The valve should be attached firmly between 85mm and 95mm below the finished
surface to allow the cover plate to fit neatly, using the two fixing holes on the
valve. Position the valve centrally between the feed pipes and mark the screw positions,
drill and plug the wall.
NOTE: Make sure the mixer valve is kept in a clean place to prevent rubbish etc, getting into
the openings while fitting the pipework. Tiling behind the trim plate must leave
sufficient access to the valve for servicing later.
6. Position the mixer valve onto the hot and cold water feed pipes and tighten the
compression nuts (See Fig 7). Hold the mixer valve in place and secure to the wall with
screws. Make sure the mixer valve hot feed is connected to the inlet marked hot and the
cold inlet market cold. The valve will not work correctly if connected the wrong way.
7. Screw the two chrome cover sleeves onto both the control shafts (See Fig 8).
8. Pipes must be fitted from the ¾ BSP female outlets of the mixer valve to thelocation
at which you wish to position the wall outlet, overhead arm or other fittings. These
pipes must end in ½ female connection so the wall outlet and overhead arm can be
fitted. If fitting as a 2 way valve, the unused outlet must be blanked off using the ¾ BSP
blank plug supplied.
9. Once the mixer valve and wall outlet are fitted, prior to fitting the trim plate ensure all
connections are watertight. This can be done by reconnecting the water supplies and
check all connections. To do this you must fit the diverter handle in the correct position
so that ‘off’ is at the bottom. After pressuring the system and checking no leaks are
present turn the handle to all other positions, checking each time that there is no leak.
Return the handle to its original position and remove.
10. The trim plate is fitted by pushing it onto the mixer valve until flush with the tiles
(See Fig 9).
NOTE: Before assembling the valve controls identify all the parts and check that both
the red markings on the control shaft of the thermostatic control are inline.
11. Fit the on/off control knob onto the diverter (the top shaft with the ‘off’ at the bottom),
push fully onto the shaft. Hold firmly in position and tighten the grub screw with allen
key supplied (See Fig 10a/b).
6
67
Approx 150mm
585mm - 95mm
8910a 10b
Square Style Round Style
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12. Next fit the stop ring into the lower shaft assembly with the notch at the bottom
(See Fig 11).
13. Fit the temperature control knob onto the lower shaft with the override button at the
top. Hold the control knob firmly in position and tighten the grub screw with allen key
suppled.
NOTE: Test water temperature by turning the flow control knob clockwise. Allow the water
to stabilise, this should be at approximately 38˚C. Use a thermometer to accurately
measure this temperature. If the temperature is not 38˚C you need to adjust the stop
ring so it is in the correct position (See commissioning).
14. Fit chrome caps to the grub screw hole for square style and fit control levers to circular
style to complete valve installation (See Fig 12a/b).
RISER RAIL FITTING FOR Square Style
1. Having established the position of the riser rail so that the showerhead can be
comfortably reached whilst using the shower, make sure any cables and pipework are
not behind the screw holes. (See Fig 1)
2. Remove caps and covers from brackets. (See Fig 2)
3. For new installation Drill, plug and screw. For replacement installation locate bottom
hole and screw. (See Fig 3a/b)
7
11 12a 12b
HOT COLD
OFF
HOT COLD
OFF
Square Style Round Style
3b
12 3a
4. Fit rail through lower bracket and clamp. Place the remaining bracket on top of the rail
making sure the slot in the rail is located in the notch. If replacement riser fix and screw
into existing hole. If new installation ensure the hole position is vertically aligned and
mark the wall. Unclamping the lower bracket and remove the rail then drill and plug
the wall.
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8
45
5. Slide the height adjuster onto the rail. Then fit the soap dish, dampening the rail will
make it easier to slide on. (See Fig 4& 5)
6. Replace the rail assembly through the lower bracket and clamp. Fix top bracket to wall
and then loosen lower bracket and fit rail into top bracket ensuring the slot locates
into the notch and retighten lower bracket. Refit caps.
NOTE: The adjustable height adjuster grips the conical ends of the hose, not the handle of
the showerhead.
RISER RAIL FITTING FOR Round Style
1. Having established the position of the riser rail so that the showerhead can be
comfortably reached whilst using the shower, make sure any cables and pipework are
not behind the screw holes. (See Fig 6)
2. Remove end bracket cover, to explore fitting point from upper of lower brackets.
(See Fig 7)
3. Drill and plug the wall and fix the lower bracket without the rail locator notch. Fit rail
to lower bracket. Place the remaining bracket on top of the rail making sure the slot in
the rail is located into the bracket notch. Ensure the hole position is vertically aligned
and mark the wall. Remove the rail then drill and plug the wall.
4. With the handset height adjuster on the left hand side, fit the hose retaining ring onto
the bottom of the rail assembly. (See Fig 8 & 9)
5. Replace the rail assembly through the lower bracket refit the top bracket ensure the
slot or indent in the rail is located into the bracket notch and fix to the wall.
6 7 98
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13a12 13b
Square Style Round Style
FITTING THE DOUBLE INTERLOCK HOSE & HANDSET
1. Connect one end of the double interlock hose to the outlet on the wall outlet,
(See Fig 10a & 10b) making sure that the sealing washer is in place.
2. Pass the double interlock hose through the hose retaining ring the screw onto the
handset using the washer (See Fig 11a & 11b), carry out a leak test.
3. MX provide an eco flow controller with every handset they sell. This reduces the flow
of water at high water pressures. If you require, fit between the handset & the hose.
NOTE: It is the conical end of the double interlock hose which grips into the handset height
adjuster. The handset will not fit in the height adjuster without the double interlock
hose attached.
WALL ARM FITTING
1. Establish position of wall arm to suit users requirements (See Fig 12).
2. When fitting the wall arm drill a suitable 19mm hole through the wall, you may require
a suitable piece of wood to give the arm support behind the tiles or plasterboard.
3. Remove fittings and nuts from end of arm and push arm through wall, re-fit washer
and nut.
4. Connect wall arm to the pipework installed from the valve.
5. When attaching the fixed showerhead make sure the sealing washer is in place and
screw tight to seal the joint (See Fig 13a & 13b) again a flow controller can be fitted if
required.
6. Pressure test to make sure there are no leaks before tiling.
NOTE: The fitting of these items should be carried out by a competent person.
10a 10b 11a 11b
Square Style Round Style Square Style Round Style
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