麦克维尔AWS风冷机组操作维修手册

Operating&MaintenanceManualOMM1123Group:ChillerPartNumber:OMM1123Rev00Date:January2012Supercedes:December2011©2011McQuayInternationalPathfinder™Air-CooledChillersAWS170A/BthroughAWS550A/B(IncludesModelswithOptionalVFD)60HertzR-134aSoftwareVersion:2507500209and25075002102OMM1123TableofContentsINTRODUCTION........................................................3OPERATINGLIMITS:...............................................4CONTROLLERFEATURES.....................................4GENERALDESCRIPTION........................................5CONTROLPANELLAYOUT..........................................5POWERPANELLAYOUT..............................................6ECONOMIZERCOMPONENTS.......................................7CONTROLLERDESCRIPTION...............................9HARDWARESTRUCTURE.............................................9SYSTEMARCHITECTURE...........................................10SEQUENCEOFOPERATION................................11CONTROLLEROPERATION.................................15SETPOINTS................................................................18UNITFUNCTIONS....................................................22CALCULATIONS.........................................................22UNITAVAILABILITY.................................................22UNITMODESELECTION............................................23UNITCONTROLSTATES............................................23UNITSTATUS............................................................24ICEMODESTARTDELAY..........................................24EVAPORATORPUMPCONTROL.................................25NOISEREDUCTION....................................................25LEAVINGWATERTEMPERATURE(LWT)RESET.......26UNITCAPACITYCONTROL........................................28UNITCAPACITYOVERRIDES.....................................30RAPIDRESTORE™OPTION........................................33CIRCUITFUNCTIONS............................................35CALCULATIONS.........................................................35CIRCUITCONTROLLOGIC.........................................36CIRCUITSTATUS.......................................................37COMPRESSORCONTROL............................................38CONDENSERFANCONTROL......................................39FANCONTROLWITHOUTVFD..................................39FANCONTROLWITHVFD.........................................41EXVCONTROL.........................................................41ECONOMIZERCONTROL...........................................43LIQUIDINJECTION....................................................43LIQUIDLINESOLENOIDVALVE...............................44CAPACITYOVERRIDES–LIMITSOFOPERATION......44ALARMSANDEVENTS.........................................45SIGNALINGALARMS................................................45CLEARINGALARMS/FAULTS....................................45DESCRIPTIONOFALARMS........................................46ALARMLISTING.......................................................46UNITFAULTS...........................................................48UNITWARNINGS......................................................49CIRCUITFAULTS......................................................50CIRCUITPROBLEMS.................................................55ALARMLOGGING.....................................................56EVENTLOG..............................................................56USINGTHECONTROLLER..................................57NAVIGATING............................................................58OPTIONALREMOTEUSERINTERFACE.........62OPTIONALCOMPRESSORVFD..........................64FAULTSANDMINORFAULTS/ALARMS....................64CLEARINGVFDFAULTS..........................................64NAVIGATINGVFDFAULTCODES............................64OPTIONALPOWERFACTORCORRECTIONCAPACITORS...........................................................68START-UPANDSHUTDOWN...............................69TEMPORARYSHUTDOWN.........................................69EXTENDED(SEASONAL)SHUTDOWN.......................70FIELDWIRINGDIAGRAM...................................72SYSTEMMAINTENANCE.....................................74PUMPOPERATION....................................................77PREVENTATIVEMAINTENANCESCHEDULE..............78APPENDIX................................................................79DEFINITIONS............................................................792010McQuayInternational.InformationcoverstheMcQuayInternationalproductsatthetimeofpublicationandwereservetherighttomakechangesindesignandconstructionatanytimewithoutnotice.Thefollowingaretrademarksorregisteredtrademarksoftheirrespectivecompanies:BACnetfromASHRAE;LONMARKandLONWORKSfromEchelonCorporation;McQuay,MicroTechIII,Guardister,andOpenChoiceandRapidRestorefromMcQuayInternational;ExcelfromMicrosoftCorp.UnitcontrollersareLONMARKcertifiedwithanoptionalLONWORKScommunicationsmoduleManufacturedinanISOCertifiedFacilityModbusOMM11233IntroductionThismanualpro