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8. FITTING THE MIXER VALVE 

IMPORTANT: Ensure that you have read through section 7. IMPORTANT INSTALLATION INFORMATION before 

starting to fit the mixer valve.

1.  The supply pipework can be plumbed from above 

or below but must finish with suitable connections, 

which should be at 150mm centres.  A standard 

Easy Fit Kit can be purchased to make installation 

easier if required. Connect the 15mm pipework 

using standard compression fittings (Fig 1).

2.  Screw the supplied nut covers onto the dogleg 

fittings until tight to the wall. If required put a bead 

of silicone sealant around the inside of the cover to 

prevent moisture entering the wall. The nut cover 

can be adjusted depending on the length of exposed 

thread from the elbow (Fig 2).

3.  Offer the mixer valve to the fittings, making sure 

the sealing washers are in place, screw the unions 

onto the fittings. The mixer valve must be positioned 

horizontally with the hot supply on the left hand side 

of the outlet (Fig 3).

NOTE:  Ensure you have the correct valve with the 

water outlet on the bottom when the hot water inlet is 

to the left.

1

2

3

9. OPERATION

There are 2 control handles on the mixer valve. 

TO CONTROL THE FLOW 

Turn the right control handle anti-clockwise to turn on and increase the flow. Turn clockwise to decrease  

and turn off. 

TO CONTROL THE TEMPERATURE 

On the temperature control a numbered dial indicates the direction for hot and cold flow.  

Turn anti-clockwise for hot and clockwise for cold. 

If in operation an increase in temperature above the factory set temperature is required, simply depress  

the stop button on the temperature handle when it reaches the stop and continue to turn the handle  

anti-clockwise until the desired temperature is found.

38

• Flow Control

Temperature Control •

Summary of Contents for Atmos Sigma

Page 1: ...Fitting Instructions IMPORTANT This Step by Step guide should be retained after installation Atmos Sigma Thermostatic Bar Mixer Valve ...

Page 2: ...mumof5barrunning pressure Themixervalvemustnotbesubjectedto watertemperaturesabove80 C Thismixervalveis alsosuitableforthermalstorage unventedsystems andpumpedgravitysystems IMPORTANT Beforeinstallingwithagas instantaneouswaterheater makesureitiscapable ofdeliveringhotwaterataminimumswitch onflow rateof3litresperminute Atflowratesbetween3and8litresperminute theappliancemustbecapableofraisingthewat...

Page 3: ...IMPORTANT This Step by Step guide should be retained after installation Dogleg Thread Adaptor Please make sure ALL components are included before starting the installation Description Quantity BarMixerValve 1 DoglegThreadAdaptors 2 NutCovers 2 FilterWashers 2 FittingInstructions 1 RegistrationCard 1 ...

Page 4: ...ndent 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...

Page 5: ... Itis veryimportantthatforuseinanymainspressure systemsanexpansiontankandapressurereducing valvehasbeenfittedtoensurethepressuredoes notexceed5Bar Thisshouldbeconfirmedbytheinstallation engineerorcompetentperson beforeinstallation WATER TEMPERATURE REQUIREMENTS Maximumhotwatertemperature 80 C Recommendedmaximum 65 C Minimumhotwatertemperature 55 C Maximumcoldwatertemperature 20 C TEMPERATURE ADJUS...

Page 6: ...asaredsymbol nexttotheinletandmustbeonthelefthandside If themixervalveyouarefittingiswithariserrailthe outletshouldpointdown ifthemixervalveisforan overheadtheoutletshouldpointupwards n Themixervalveisdesignedtoworkatthesame hotandcoldwaterpressures Ifthisisnotthecasea flowcontroller discwithsmallholes canbefittedto thehigherpressuresupplytothevalve Thisisbest donebytestingeachonetofindoutwhichgiv...

Page 7: ...hefittings makingsure thesealingwashersareinplace screwtheunions ontothefittings Themixervalvemustbepositioned horizontallywiththehotsupplyonthelefthandside oftheoutlet Fig3 NOTE Ensureyouhavethecorrectvalvewiththe wateroutletonthebottomwhenthehotwaterinletis totheleft 1 2 3 9 OPERATION Thereare2controlhandlesonthemixervalve TO CONTROL THE FLOW Turntherightcontrolhandleanti clockwisetoturnonandinc...

Page 8: ...lets 3 Overridethetemperaturestopbuttonbypressing thebuttonandrotatetomaximumbeingcarefulto avoidscalding Measurethetemperature 4 Thevalveshouldthenbecheckedtoconfirmthe waterisolationperformscorrectly Runthevalveat the38 Cstopposition Checkthewatertemperature 5 Turnoffthefeedofcoldwaterusingtheisolation valve Thewaterflowshouldfalltoaverylowflow possiblyonlyadrip afterafewseconds 6 Collectthewate...

Page 9: ...vevalveandcleanfilters 4 Showerheadblocked CleanShowerhead 5 Systemnotcapableofsupplyingmultipleoutlet atthesametime Reducesimultaneousdemand Checkstop servicevalvesarefullyopen Checkifenough waterpressure Q WatertooCOLD A Ninethingstocheck 1 Temperaturecontrolisnotcorrectly commissioned Adjustthetemperaturecontrol thisisonlyajob forasuitablyqualifiedperson 2 Notenoughhotwaterflowingthroughshower ...

Page 10: ...yMXGrouptoyouthecustomer 2 Thisguaranteeispersonaltotheoriginalpurchaserofthe componentandisnottransferable 3 Originalproofofpurchase s mustbeshownforanyclaim underthisguarantee 4 Thisguaranteedoesnotcoveranycomponentsthathavebeen modified alteredortransformedinanyway 5 Thisguaranteeappliestoanoriginalinstallationinaccordance toourfittinginstructionsanddoesnotcoverpreviouslyinstalled components sh...

Page 11: ...rcontactdetails andthepostcodewheretheunitisinstalled 2 TheMXGroupCustomerServiceDepartmentwill beabletotellyouwhetherthefaultcanbesimply rectifiedbytheprovisionofareplacementpart 14 SPAREPARTS Intheeventthatpartsormaintenanceisneeded outsidetheguaranteeMXwillendeavourtohelp withthis Sparepartscodesaregiveninthefitting instructions BycallingtheCustomerService Departmenton08455052211withthepart num...

Page 12: ...il sales mx group com www mx group com CUSTOMERCARE 08455052211 TRADE DESCRIPTIONS ACT Variations in terms of colour finish materials and all other aspects of appearance may occur on occasions either through non availability of materials or due to our policy of continuing technical improvement Therefore the Company reserves the right to change specification or withdraw products from this list with...

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