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Rigid,unplasticized,normalimpactpipe,withwelded,push-fitormechanicaljointssuitableforhighStainlesssteelpipeworkandfittingsmaybeusedwherehighqualityfinishesarerequired.PushfitorBuriedcoldwater All CIWP ,PB.2Irrigationtype,shallbestationaryorrotatingaction,fullorpartialcircle.Theyshallbeflushwiththetoformaswingjoint.Thehorizontalnippleshallbeatleast200mminlengthtoprovideforSystemsshallbezoned,automaticallycontrolledbysolenoidactuateddiaphragmvalvesandanVacuumbreaker(ifcopperlined)PressurereliefvalveHightemperaturealarmactuatedwhenwatertemperatureexceeds66°C.Wiredtothe
Allinsulationjackets,facings,membrane,adhesives,mastics,coatingsandaccessorymaterialsTheratingsforinsulationwithfactoryappliedjacketsorfacingsshallbeonacompositebasisof
InsulationshallbefastenedinconcealedlocationswithaluminumbandsorsoftannealedwiresInsulationmustbecarriedthroughoraroundhangers.Forcoldpipes,ifinsulationiscarriedincreaseininsulationthickness.38mmat Fibreglasswithfoilfacings,and
jacketsealed,38mmatProvidepipedexpansionloopsoroffsetsatapproximately 30meter (100ft)intervals forexpansionpurposes.Wherecitywatersupplypressureisconstantandadequateconnectdirectlytolowerfloorsof
serviceandpublicareas.Higherpressurezonesshallhavetheirowndedicatedvariablespeed
3. Fixturesandappliancesinguestrooms,publictoilets,healthfacilities,serviceareasandstaffchangingroomsshalllimitflowto:Washbasins:6.8litres/minbyuseofflowcontroloraeratorRecyclegreywaterfromhandwashbasins,bathtubs,saunabasin,laundryetc.forre-useintoilets,Centralisedkitchenoperations.Functionareas/restaurantstobeservedcentrallyasmuchas
Watertreatment:filterbackwashcyclesshallbeautomaticandlimitwaterquantitybyrecovering
90%ofallwater.Thisrequiressecondarytreatmentwithhighefficiencymembranefiltersand
Gardenirrigationsystemsshallbeautomatic,basedonmoisturecontentofthesoilandtailoredto
actualneedofselectedplants.Programmetofunctionprimarilyatnight.Avoidopenspraytype
Basedonspecialistsrequirements/frequencyofbegiventohotelChiefEngineer.DemonstrationofsystemperformanceandinstructiontoIHGTestallinteriorwaterdistributionsystemstoapressureofatleastoneandahalftimestheirnormalTheContractorshouldprovidethreesetsofoperatingandmaintenanceinstructionmanuals,coveringforeachmechanicalequipmentroomshallbeneatlylaminatedinpermanentlytranslucentplasticandshallincludeonecompletesetofhighgradewrenchesforpumps,compressorsandotherequipmentfurnishedinasuitablehardwoodorotherapprovedcontainerwithlockandtwo(2)keys.PastedonPressuretypezeolite,duplexsoftenersshouldbeprovidedwhereindicatedbywateranalysisandwaterTheremovalofhardwatercanbeaccomplishedusingabaseexchangewatersoftener.Theunitshould
beautomaticoperationandrechangeusingproportionalbriningwithametermonitoringoperation.DiameterEachUnit Basedonmaximum5.4l/sperm2,withtwosoftenerShellHeight Asrequiredtoholdresinwith25%freeboardaboveheatingelements,etc.Thisreducedefficiencyofheattransfertosystems,whichincreasesenergy0.6meterspersecondflow.Offsetswhereunavoidableintherisergreaterthan45degreesrequireaReviewlocalcoderequirementsforgreaseinterceptorsforKitchenfacilities.Individualgreasetrapsgreasetrapsareimpractical,acentralgreasetrap,easilyaccessibleforemptyingintotrucks,shallbeABSPVCseparatesystemofpiping.Dischargeistobebygravityintoanairtightejectorpit,thenpumpedby
Alldrainagepumpsshallbeofthenon-clogimpellertype,capableofpassingaminimumof65mmThesanitarydrainagesystemshouldbeprovidedwithasystemofventpiping,whichwillpermitthe
finishedareasandwhicharesealedagainstfire,shallbeprovidedwitha50mmdrain,pipedtoavisibleAnindirectwastesystemshouldbeinstalledtocollectdischargesfromoverflow,thermalreliefand(2.4mbar)ontheportionofthesystembeingtested.Thepressuremustremainconstantfor15minutesPumphouseTheplantshouldbemodifiedtoincludetertiarytreatmentifrequiredbythefinalpointofdischargeorDischargeoftreatedwatertosoak-a-waysorwatercoursesshouldbemonitoredonaregularbasistoroadwaytoplantareashouldavoidoccupiedareas,eitherinternallyorexternally(eg,bathingareas,finaleffluentoveratwelvehourperiod,freezingeachsampleasitistaken.Thesamplesshouldbe
takenatperiodswhichapproximatetheflowratesspecifiedbytheplant.Thesamplesshallbe
20ppm50%TheContractorshouldprovidethreesetsofoperatingandmaintenanceinstructionmanuals,coveringforeachmechanicalequipmentroomshallbeneatlylaminatedinpermanentlytranslucentplasticandalsobefurnished.Furnishalistofmanufactures(withnamesoflocalrepresentatives)inordertofurnishedinasuitablehardwoodorotherapprovedcontainerwithlockandtwo(2)keys.Pastedonintoastormsewer,combinationsewer,ocean,rainwatercisterns,orswale,asconditionsdictate.All
drainagebelowgravitylevelshouldbecollectedanddrainedintoasumpandthenpumpedintothe
stormhousedrain.Pumpsshouldbeinduplicateandbeprovidedwithemergencypowerwhere
Catchbasinsmaybeconstructedofbrick,concreteorprecastconcretewithcastironframesandgrates,“Flat”roofareasshouldbebuilttoaminimumfallsof1:200.Outletsshouldbepositionedattheperimeterofroofareaswiththresholdstoraisedplantrooms,etc,atrooflevelsetathigherflevelthantheroofedge.Roofswithparapetwallsorwhicharelandlocked,suchasvalleygutters,shouldhaveThetraditionalmethodofdrainagesurfacewaterfrompitchedroofareasisbymeansofguttering.CastIrongutteringanddownpipesareusuallysuppliedunpaintedapartfromprimer,tobepainted
Aluminiumgutteringanddownpipesareusuallysuppliedpre-coatedincoloursspecifiedbythe
UPVCgutteringanddownpipesareusuallyselfcolouredplasticwiththerangeofcolours
Inareassubjecttosnowfallconditionsitisadvisabletofitsnow-boardspriortothegutterstopreventDownpipesfromguttershouldhavestrainersfittedinthenozzleoutletsfromtheguttertoprevent
panelsatbendsorbranchesinexcessof45°andatthelowestpointofthedownpipepriortotheWhereverylargeflatsurfaceareasrequiredrainage,syphonicdrainagesystemsmaybeconsidered.Thesystemoperatesontheprincipleofsyphonicaction,withcarefullysizedoutletconnectionsto
horizontalsurfacewatermanifoldpipes.Theseareconnectedtodownpipesdesignedtofloodunder
normaloperatingconditionscreatingaplugofwater,whichinturnfloodsthemanifoldandoutlets.
Thesystemsarenormallydesigned,suppliedandinstalledbySpecialistContractors,usingfusionweldedplasticsforpipeandfittings.Theyarenotsuitableforsmallerroofareasbecauseofthelargequantityofwaterflowrequiredtoinitialisethesystemsoperation.ContactIHGwhenconsideringtheIdeallyallstormwaterdrainageshouldbeachievedbygravity,avoidingunnecessaryuseofsumpsandToconservewater,stormwatershouldbecollectedinstoragecisternsforusewiththenon-potableServiceszonesonupperfloorsandbelowterracesandbalconiesshouldbeallowedforthehorizontalAllsystemsshouldbefullytestedandoperationalpriortoturnovertoIHG.CopiesofallrecordsTestburieddrainageandmanholeswithawatertest,priortobackfillingtrenchinsertingplugsintothelowendofthesystem,imposingacolumnofwater1.2mminimumathighendand2.4matlowend.Oncefilledallowsometimeforabsorption,filltodesiredlevel,thenoveraperiodof30minaddmeasuredamountstomaintainlevel.Thisamountshouldnotexceed0.06litresperhourper100mperTheEngineershouldspecifyarequirementforsparepartstobefurnishedbythePlumbingContractor.Whereapplicable,thehotelshouldbeprovidedwithalowpressuregaspipingsystemtoserveallgasThesourceofthegasmaybefromlocalgascompanymainsorfromstoragevesselsdependantuponThesystemshouldbedesignedtoconformtorulesandrequirementsoflocalauthorityandstatutorybodyNFPA.Standardsforallgasinstallationsincluding,ventilatedrisers,combustiongasemissions,Assessmentofloadsshouldbebasedonboilerpeakdemand,kitchenappliancesandHWSgenerator
demand,calculatedusingtheappropriatecalorificvalueforthegasavailable.Eachitemofequipment
connectedtothegasshouldhaveanisolatingvalveandunionconnectorstofacilitatereplacementor
Materialsforpipeworkshouldbeblacksteel,orcopperwithinbuildingsandblacksteelorUPVCwhenburiedexternally.Wheregasservesagroupofappliancesasinakitchenorboilerroom,aknock-offbuttonshouldbeinstalledimmediatelyadjacenttotheaccessdoor,connectedtotheBMSandashutoffboilersgasispreferabletofuelduetoitslesserenvironmentalimpact,i.e.fluegasqualityandinternalCareshouldbetakentomatchboilerloadsascloselyaspossibletothedemand.ModularboilerEmissionsmaybereducedbytheemploymentofsolarpanelstopre-heatcoldfeedstoplant.ThisWherepiped‘towngas’isnotavailablebottledmaybeused.Bulkstorageofliquidpetroleumgas,
butaneorpropaneshouldbesizedtoprovidetwoweekssupplyatmaximumuse.Thestoragetank
Asystemofcompressedairandvacuumpipingforlaundryuseshouldbeprovided.Theequipmentsuppliershallsupplythecompressorsandvacuumpumps.ThesystemofcompressedairmaybePipeworkshouldterminatewithavalveadjacenttopumpsets/compressorsandincludesufficientCompressorsshouldbesituatedinamachineroomorplantroomwithinareasonabledistanceoftheSeparators-fittedinamaintoremovesuspendedmoistureintheair.Dryers-vesselswithabsorbentmediumtoremovefurthermoisture.Forlargecompressedair
Aftercooler-thisfurtherreducesmoisturecontentthoughcondensation.Pressurereducingvalve-servinggroupsof,oritemsofequipmentwithdesiredpressure.Pipingmaterialsshouldbeblacksteel,coppertubeorUPVC.FlexibletubingshallbemanufacturedEnsuredrainageisavailablefrompipelinesandcompressorunitandadjacenttotheaftercooler,withPipesizingshouldbegenerousasmanyproblemscanbeexperiencedifvelocitiesaretoohigh,suchas
Asthecompressormachinerytendstobeverynoisy,ensurethattheequipmentissitedawayfromresidentialareas,situatedinanacousticallytreatedenclosureorplant/machineroomarea.Considerationmustbegiventonoisebreak-outideallyselectingquietermachinery,assessingcostsSanitaryfixturesandfittingsshallbeselectedandspecifiedbytheArchitects-EngineersandapprovedproductsofrecognizedandreputablemanufacturersandsubstitutionsshallnotbeapprovedwithouttheFixturesfortypicalHotelBathroomsandpublictoiletsshallbewhiteorcolorascalledforbytheHotel
programme,withpolishedchromiumonbrassfittings.Fixturesforservicetoiletsshallbewhite.All
fixturesinanyoneroomshallbetheproductofthesamemanufacturer,toensurethatcolorsare
Whererequired,fixturesforsuitetoiletsandBathroomsshallbeincolor,withspecialfittingsandtrim,Waterclosetshallbewhite,wallhungwithL-supportbar,completewithwhitesolidplasticfullseatBidetshallbeofvitreouschina,coordinatedindesignwiththewatercloset,withcombinationsupplyfittingforsupplyinghot,coldortemperedwatertooverrimsupplyfitting;pop-upstopper.ProvideBathtubshallbeanacidresistingenamelled3.5mmsteelfixturewithflatwithfactoryetchedslip-
finishedBathroomfloor.Bathtubmayhaveanintegralfrontapron,orbedesignedtoacceptafront
Bathtubfittingsshallconsistofabath/showerthermostaticmixingvalve,diverter,over-rimbathspout,
anapprovedadjustableself-cleaningshowerheadwith3.5gpm/13.2lpmvolumeregulator,andpop-
Grabbarshallbe600mmlengthattubwallandanother460mmlengthatshowercubicle,whereShowercubicle’sshallbeprovidedwiththermostaticmixingvalvesandanapprovedadjustableselfWaterclosetshallbewhite,wallhungwithL-supportbar,completewithwhitesolidplasticfullseatUrinalshallbevitreouschina,washdownaction,wallhungfixture,actuatedbyanindividualselfShowercubicle’sshallbeprovidedwithThermostaticmixingvalvesandanapprovedadjustableselfWaterclosetsshallbesameasforpublictoiletsexceptthatseatsshallbeblacksolidplasticwithoutUrinalsinserviceareatoiletsshallbewaterlesstype.Itshallbecartridge-freedesign,andminimum
Lavatoryshallbevitreouschinawall-hung51cm.x46cm.(20in.x18in.)unit,withback,frontTheprovisionofshowersinlieuofbathtubsistobeencouragedwithaviewtowaterconservation,Basinmixertapsshouldeitherbespraytapsoraeratingtypeoutflowof6.8litres/mintofurtherflushwithdual3and6-litreflushsyphonjetwaterclosetfroma42mmflushingvalve.ShowerheadsWallhungwith'Wallhungwith'L'Wallhungwith'Wallhungwith'L'L'supportbar
Adedicatedwatertreatmentsystemshouldbeprovidedtoservepoolsforwading,swimmingordiving.Thewatershouldbeprovidedinitiallyasdescribedinsection5.1,andthenrecycledthroughtheswimmingpoolplantforreuse.ThesupplytothepoolshouldbeheatedtotherequiredtemperatureorWaterservingpoolsshouldbefreshandclean,withthedistributiontothepooldesignedsothatthequalityandtemperatureofthewaterismaintainedatacceptablelevels.AllcriticalchemicalparametersPoolplantshouldbeselfregulatingandincludeautomaticmonitoringofpHlevelschemicallevelsand(iii)E CIdeally,plantservingpoolsshouldbesitedwithin,theirimmediatevicinity.Asingleplantroom
shouldservemultiplepools,arrangedwithrunandstandbyfacilitiestominimisedisruptiontopool
poolsize,willhaveaminimumof2suction/drainconnectionsonthecircuittothepump.Short-
circuitingofwatershouldbeavoided.Poolswithhighnumbersofinfantusageshouldhavea
Thefiltrationselectedshouldachieveavisibilityofatleast12mgivingclearviewsofallpartsofMildsteelhigh-pressuresandfiltersshouldberatedat12-13l/spersquaremeteroffilterarea.TheApressureswitchshouldbefittedpriortothefilterforbackwash/rinserequirements.PipeworkWherefiltrationalonewillnotachievewaterclarityrequired,useflocculates,eg,aluminiumTheannihilationofbacterialinfectionofpoolwatersmaybeaccomplishedusingseveralmethods.Chlorineapplication,viasodiumorcalciumhypochloriteadditivesorelectrolyticallygeneratedin
Chemicaladditivesallhavesideeffectsuponpooluserstogreaterorlesserdegreeswherenotcarefullycontrolled.Chlorinegasisnotrecommended,asstringentsafetyprecautionsmustbeTreatment Benefits Problems ApplicationChlorine Triedandtrusted Requirescarefulcontrolcan Largerpoolswithtrainedmethodofpool causeirritation of eyes, maintenancestaff,usedtowatertreatment discolour hair. Unpleasant handlingchlorine.Residualchlorine fumeswhichcanbelethalin Wherewaternotusedforcontentinwater caseofaccidentalrelease. irrigation. Wherelargemaintains Renders discharged water proportionofinfantsusingdisinfectant uselessforirrigationifitistobe pertiesinpool recycled,butcanbeusedforaftertreatment urinal/WCflushing.FumescanBromine Residualbromine Cancauseskinirritation,sore Smallpoolswithcompetentcontentinwater throatsandstingingeyes. maintenancestaff.maintains Renders discharged water Wherelargeproportionofdisinfectant uselessforirrigationcanbe pertiesinpool usedforflushingaftertreatment.Ozone Powerful Onceadded,mustberemoved Wheregreatestproportionofdisinfectant,oxides againpriortouse. usersareadult,andwatertoimpuritieswithout Noresidue,sowatercan berecycledforirrigating,providing side becomecontaminated.Itis etc.recommendedthatasmallamountofchlorineisaddedtomaintainpoolsdisinfectantqualitiesbutthisshouldbecanberecycled UltraViolet Oncefitted Noresidue,sowatercansystemisvery simpletomaintain SmallamountsofchlorinetobeaddedormorefrequentpoolWherethereislimitedspaceofstoringchemicals,ornotlargeenoughplantcomplextowarrantfullytrainedpoolWheregreatestproportionof
usersareadult,andwaterto
berecycledforirrigating,
Wherethereislimitedspace
ofstoringchemicals,ornot
largeenoughplantcomplex
towarrantfullytrainedpool
E)pHLevelControlControlofpHlevelsisparticularlyimportantwherechlorineisselectedasthemediumusedforWherechlorinedonorshavebeenintroducedsuchassodiumorcalciumhypochlorite,thepHtendstowardshardness,thereforetreatmenttoincreaseacidityshouldbeappliedusingoneoftheCalciumchloride
Carbondioxide
Sodiumbisulphate
HydrochloricacidTheimportanceofmaintainingbalancedpHlevelsischieflyrelevanttotheprotectionofpartsofthepoolsystemsusceptibletocorrosionfromeitherexcessivealkalinityoracidityofpoolwaters.Analternativemethodofprotectingthesystemisbyapplicationofmagneticwaterconditioners.preventstheparticlesadheringtointernalsurfacessusceptibletoscalesuchaspumprotors,heatingwaterconditionersareprovided,pHmonitoringandcontrolarestillrequiredtomaintainlevelsinWhenassessingsizeofplantandmethodofheatingpoolwater,carefulconsiderationshouldbetakenwithregardtoexpansionofpoolstructure,concreteshell,tiling,etc.AsaguidetherateofThecharacteristicsofheatdemandforswimmingpools,arethemostsuitablematchforslowheatb.Heatpumpswhereunwantedheatfromrefrigerationplantistransferredtothepoolwater.c.Districtheatingschemes.d.HotspringsEachofthesesystemsshouldbesupplementedwithelectric,gasoroilfiredboilersviaheattheexchangers.TheseshouldbedesignedtocompensatefortimeswheretheinitialsourceisWheremorethanoneswimmingpoolisservedfromasingleplant,eachpoolshouldhaveitsownOutdoorpoolsshouldbecoveredwithaninsulatingcoverwhenoutofuse.Thisnotonlyconservesenergybyreducingheatlossoutsidehoursofsunshineeffectivelyandpreventsevaporationbutalsorestrictsusetowhenlifeguards/poolsidestaffareavailableforsupervision.Wherepossible,“wastenotpollutelocalwatersupplies,localwatercourses,lakes,streamsandthelike.Anysoakawaysor5.10.1.BOREHOLEPUMPSWherelocalwaterconditionsrequire,aboreholeshouldbedrilledtoeitherthewatertable,ortoconnecttoatleasttwoundergroundstreamsofgoodqualityandquantity.TheboreholeshouldbeofBoreholepumpsshouldbeofrobustconstructionandrequireminimalmaintenance.Allsubmersedcomponentssuchasliftingchains,strainers,pumpcasing,etc,shouldberesistanttocorrosionandsuitablefortheambientwatertemperatureintheboreholes.Anenclosureatthewellhead/topofboreBoreholepumpsshouldbesuspendedatleast500mmabovethebottomoftheborehole,supported
fromtherisingmain.Sensorsorfloatswitchesshouldbearrangedsothatpumpcasingisalways
clampatthetopoftheboreholeshouldsupporttherisingmainfromthepump.Cablesforpowering
thepipe-runadjacenttotheboreholetofacilitatewithdrawalofpumpandmain.Wherepossible,a
liftingbeamshouldbelocatedoverthehole.Acheckvalveshouldbeprovidedonthepipework
adjacenttotheholetopreventback-flowintothepump,risingmainandborehole.Afterthecheck
pump.Actingasareservoirthevesselorseriesofvesselsshouldhelpreducestop/startcyclesofthe
PumprunningPumpfailurePumponstandby/poweronLowlevelalarm/pumpcut-outVoltfreecontactsshouldbeprovidedforcommunicationtoBMSsystem.Gaugesshouldbeprovidedindicatingthesystempressureandwaterflowrate.AsightglassmaybeincludedtovisuallymonitorPumpspeedsmaybevariableutilisingfrequencyconverter,tosuitflowdemands,butshouldbea
Submersiblepumpsusedforcollectionoffreshwaterfromlocalsource,eg,rivers,lakes,etc,de-
Sumppumpsusedforlocaliseddrainagesystemswherethesystemisbelowthelevelofthe
Maceratingsumppumpsusedwithseweragesystemsbelowgroundinsumppits.Sewageejectorsusedwheresumppumpswouldbeimpracticalortooexpensivetoinstalland
run,orwherespaceisavailableinlowerfloorareas.Idealwherecompressedairsystemsare
Selectionofsubmersiblepumpsshouldbebasedontherequiredflowrate,withthepressurebasedonthestaticheadplusfrictionallossesthroughthepipework,valvesandfittings.EssentialsystemssuchassurfacewaterorsewagesumppumpsshouldbearrangedasdutyandPumpflowratesshouldbe100%each,andundernormalinflowconditions,emptysumpthreetimesperhour.Thispreventsexcessivewearofmovingpartsofthepumpsystems,andismoreenergyefficientthanpumpsthatswitchonthirtyormoretimesperhour,ifthesumpchamberistoosmallorSewagesumppumpsshouldbecapableofpassing40mmsolidsandbefittedwithcuttingimpellersSumpsforsewagepumpsshouldbeadequatelyventilatedtopreventbuild-upofnoxiousorexplosive
Whenchoosingalocationforasewageejectorconsiderplacingadjacenttoalaundryorotherfacilitywithacompressedairsystemtotakeadvantageoftheinstallationhoweveritcanberemotelysited.nolessthan6bar.Theejectorshouldincludedutyandstandbyfacilities.ThepipeworkshouldSubmersiblepumpsonrivers,lakesorreservoirsshouldbesuspendedfromfloatsanchoredinThesuctioninletshouldbefittedwithastrainerofsufficientlyfinemeshtopreventingressofdebrisThecontrolpanelshouldbemountedwithinaweatherproofenclosureatasufficientheighttoallowSubmersiblepumpswithsumpchambersshouldberemovableformaintenancebywayoflifting
chainsandguiderailsandfittedwithautomaticcouplings.Pumpslocatedinsmallersumpssuchas
Velocityofpumpedwateroreffluentshouldbekepttomaximumof2.5meterspersecond.TheSewageejectorstationscanbeeitherself-containedaspackagedunitsincludingacompressoraspartWheredutyandstandbyejectorsareinstalled,twininletsservedfromacommoninletwell,allowforWhereejectorsarerequiredinmorethanonelocation,asinglecompressorstationcanserveseveralPumpsshouldbefullypackagedselfcontainedunitscomprisingmaindutyandautomaticstandby/supportpump,mountedonafabricatedsteelbaseplatecompletewithintegralcontrolpanel,interconnectingpipeworkmanifoldsandfullwiringforoperation.ThecompletepackageshouldbePumpsetsshouldbearrangedtorunamaximumof8timesperhour,withapressurevesselsizedtocopewithdemand.Alternativelyconstantrunningjockeypumpscanbeinstalled,dischargingunusedThepumpsshouldbeverticalmulti-stagequietrunninghighefficiencytypewithcastironhousing,stainlesssteelimpellers,stainlesssteelshaftandmechanicalseals.ThemaximumpumpspeedshallbeElectricmotorsshallbetotallyenclosed,aircoolarrangedfordirect-on-linestartingupto4kW,StarThecontrolpanelshouldbedesigntocomplywiththelocalregulations.Protectionfrombothdirectandindirectcontacttobeprovidedbyearthleakagecircuitbreakertoensuretheautomaticdisconnectionofthesupplyintheeventofanearthfaultineithermainsorcontrolcircuits,therebyAsthesetmustbeequi-potentiallybondedtoalladjacentpipeworkandmetalworkinaccordancewithoverloadprotection,hand-off-autoswitchforeachpump,HRCfuses,HRCcontrolcircuitfuses.Inand‘poweron’lighthighlevelbreaktankalarm,highandlowlevelresetwithmuteswitchandThepanelistobeprovidedwithallswitcheslabelledinlocallanguagesandEnglish,completewithaandsparefuses.Enclosedinasheetsteel,dustanddampprotectinghousingwithlockabledoor,FlangedflexiblecouplingfortheisolationofpipeworksystemfromtheequipmentforsuctionandManifoldsconstructedfromcoppertubewithleadfreesolderedjointsorgalvanisedmildsteeltube,orUPVCinaccordancewithlocalcodesorBS,whicheverismoststringiest.Pipework50mmandaboveIsolationandnon-returnvalvesoneachpumpdischargeandisolationvalvesoneachpumpsuctionPumpcontrolelectrodesshallbeprovidedcompletewithtankfixingbossassembliesandwiringdiagramsforcutoutandcutinsequencingofpumps.WiringbetweenelectrodesandcontrolpanelsWheredualcompartmenttanksarespecified,duplicationofcontrolelectrodesisnecessarytomaintainoperationofthesystemfromeithercompartment.Amanualselectorswitchshallbeprovidedinthese5.10.4.CIRCULATIONPUMPSPumpsforthecirculationofhotwaterservicesecondarywatershouldbeinlinecirculatorshavingbronzeorgunmetalbodieswithstainlesssteelimpellersandshafts.ElectricmotorsshouldbetotallyPumpssetshallbeprefabricatedasacompositeunitincorporatingsuctionisolationvalve,‘Y’typestrainer,suctionpressuregauge,deliveringnon-returnvalve,deliverypressuregaugeanddeliveryisolationvalve.TheyshallallmountedonasteelcantileverwallbracketandfinishedonecoatofTankandcisternsshouldhaveball-floatvalves,whichautomaticallyfillthetankstoapredeterminedOverflowoutletsshouldbearrangedsothatinlettothetankcannotbecomesubmerged.Thisisparticularlyimportantwherestoredwaterisclassedasnon-potable,inwhichcasespecialspillover
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