全球連鎖酒店集團工程設(shè)計標準建筑、結(jié)構(gòu)、機電、聲學

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