Designation:F856−97(Reapproved2014)AnAmericanNationalStandardStandardPracticeforMechanicalSymbols,Shipboard—Heating,Ventilation,andAirConditioning(HVAC)1ThisstandardisissuedunderthefixeddesignationF856;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.1.Scope1.1Thispracticecoverssymbolsusedonheating,ventilation,andairconditioning(HVAC)detailedengineeringdrawings.1.2Thesesymbolsmaybeusefuloncontractandprelimi-narydesigndrawings.2.SignificanceandUse2.1Whensymbolicrepresentationisrequiredforanitemnotcoveredinthisstandard,thecharacterofthesymbolshallbeadequatelyidentifiedandshallbesubjecttooneinterpreta-tiononly.Ifnecessary,anoteshallbeattachedtothesymbolforfurtherclarity.2.2Symbolicrepresentationdoesnotrequireexactorscalelayoutsoftheactualsystem.Therefore,thesymbolsmaybeusedinallviewsofthesystemlayout.3.Abbreviations3.1Theabbreviations(foruseonlyinthispractice)aredefinedasfollows:AF=axialfanAFD=automaticfiredamperwithmanualoverrideBD=balancedamperCC=coolingcoilCCW=counterclockwiseCE=convectionheater,electricCF=centrifugalfanCS=convectionheater,steamCW=clockwiseEH=turretheater,electricEP=ductpreheater,electricER=ductreheater,electricEU=electricunitheaterF=filterFA=flamearresterFCA=fancoilassemblyFCU=fancoilunitG=grilleGC=gravitycoolingcoilH=humidistat,humidifierL=louverM=motorMFD=manualfiredamperNE=naturalexhaustNS=naturalsupplyR=returnairRO=remoteoperatedSFD=solenoidfiredamperSP=preheater,steamSR=reheater,steamSU=steamunitheaterT=thermostatTE=temperedair,electricTS=temperedair,steamU=undercutUC=unitcoolerV=volume,volumetricVC=volumecontrol4.Illustrations4.1IllustrationsforHVACsymbolsaregiveninFigs.1-4.5.Keywords5.1airconditioning;designsymbols;engineeringsymbols;heating;HVAC;marine;ship;sym...
