Designation:E1056−13StandardPracticeforInstallationandServiceofSolarDomesticWaterHeatingSystemsforOne-andTwo-FamilyDwellings1ThisstandardisissuedunderthefixeddesignationE1056;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thispracticeprovidesdescriptionsofsolardomesticwaterheatingsystemsandsetsforthinstallationandservicepracticesinnewandexistingone-andtwo-familydwellingstohelpensureadequateoperationandsafety.2,31.2Thispracticeappliesregardlessofthefractionofheat-ingrequirementsuppliedbysolarenergy,thetypeofconven-tionalfuelusedinconjunctionwithsolar,ortheheattransferfluid(orfluids)usedastheenergytransportmedium.However,wheremorestringentrequirementsarerecommendedbythemanufacturer,thesemanufacturerrequirementsshallprevail.1.3Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.4Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificprecautionarystatements,seeSections6and7.2.ReferencedDocuments2.1ASTMStandards:4E772TerminologyofSolarEnergyConversion2.2SMACNAStandards:5MediumPressureDuctConstructionStandardsFibrousGlassDuctConstructionStandardsFlexibleDuctPerformanceandInstallationStandards2.3NFPAStandard:NFPA321BasicClassificationsofFlammableandCombus-tibleLiquids62.4ANSIStandard:Z21.22ReliefValvesandAutomaticGasShutOffDevicesforHotWaterSupplySystems73.Terminology3.1Definitions:3.1.1auxiliaryenergysubsystem,n—insolarenergyapplication,equipmentusingnonsolarenergysourcestosupplementorbackuptheoutputprovidedbyasolarenergysystem.(E7...
