
3Installation
3.1Installingtheunit
ThePGKductcoolerisdesignedforusingchilledwaterasthecoolingmedium.Theductcoolercoil
consistsofcoppertubesandaluminiumns.
Warning
Thecoolingcoilmustnotbeusedfordirect-expansionrefrigerant.
Forairow,waterowandothertechnicalparticulars,seetabellsinchapter4.
Thecoolershouldnotbeinstalledclosetoafanoutletoraductbend,sincetheairowacrossthecoil
wouldthenbeunevenandthecoolingcapacitywouldthusbeimpaired.
Makesurethatthecoolerisinstalledsothatthennedcoil,driptrayandcondensateoutletareaccessible
forcleaning(chapter5).Theductcoolershouldbeinstalledinahorizontalduct,buttheairowmaybein
eitherdirection.Securetheductcoolertotheductsystembymeansofscrewsorslipjoints.
Thecondensateoutlet(posC)ingure2shouldbeconnectedacrossawatertrapinordertoavoid
airleakage.
Note:
Thesizeoftheoutletshouldbesuchthatnowaterwillremaininthedriptray.Whenthedriptrayistobe
removed,ensurethatthecondensateoutletiseasytodisconnect.
Anefcientlterisrecommendedinthesysteminordertoreducefoulingandthusalsocutdownthe
needformaintenance(seechapter5).
Theductcoolershouldbeinstalleddownstreamofthefanunit,althoughitcanalsobeinstalledupstream,
butcareshouldthenbetakentoensurethatthefanmotorandothercomponentswillnotbeharmedby
thehumidairdownstreamofthecooler.
Theductcoolermustbeinsulatedontheoutside,sothatnocondensatewillform.Theductsthatcarry
thechilledairmustnormallyalsobeinsulated.
3.2Waterconnections
Operatingdata:Max.operatingtemperature/operatingpressure100°C/1.0MPa(10bar)
PGKInstallationandService
1723912SystemairAB