SystemAir DANVENT DV10

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30
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i.4.2Pipeconnections
Connectionpipesonheating‐andcoolingcoilsareprovidedwithexternalthread.Drainageoutletsondrip
traysareprovidedwithexternalthread.
i.4.3Possibilityofextractingcomponentsfromtheunit
Pipesandcablesmustnotobstructtheinspectiondoorsandcomponentswhichcanbeextractedfromthe
unit.
Potentialcomponentsforextractionarefilters,fansandrotaryheatexchanger.
i.4.4Pipeconnectionstobatteries
i.4.4.1Heatingcoils
Pipesforhotwatermustbeprotectedbyinsulationagainstfrostandlossofheat.Furtherprotection
againstfrostcanbeobtainedbyinstallingelectricalheatingwiresaroundthepipesand
underthe
insulationcombinedwithtemperaturesensorsandacontrolsystem.Pipes,insulation,electricalheating
wires,controlsystemforheatingwiresandcirculationpumparenotdeliveredbySystemair.
i.4.4.2Coolingcoils
Iforderedwiththeunit,thevalvesandvalvemotorsarestoredinacartonboxplacedinsidethe
unit.
Pipesforcoolingmustbeprotectedbyinsulationagainstcondensationonthepipesandlossofcoolingin
thesummer.PipesandinsulationarenotdeliveredbySystemair.
i.4.4.3Rigidpipemountingbracketsforvalves,circulationpumpsandpipesystem
Thecoilandpipesfromthecoilarenot
constructedtowithstandtheweightandstressfromvalves,
circulationpumps,longpipesandinsulationofpipes.Thesystemmustbesupportedcarefullyinrigidpipe
mountingbracketstoroof,floorandwalls.
i.4.4.3.1Pipeconnectiontoheatingcoils
Theheatingcapacityofthecoilwithonly2rowsis
independentoftheconnectionofthehotwaterinequal
floworincounterflowtothedirectionoftheair,butconnectionofthehotwatertothepipemarkedfor
inletandthereturnwatertothepipemarkedforoutletisveryimportanttoensurethatthesensor
for
transmissionofthewatertemperaturereallywillbeplacedinareturncircuitofthecoil(Screw‐jointforthe
watertemperaturesensorisweldedinthemaincollectionpipeforreturnwater).
Forthefrostprotectionofheatingcoil,thewatertemperatureinthecoilistransmittedto
thecontroller
Thecontrolleralwaysgeneratesasignaltothevalvemotorthatkeepsasufficientflowofhotwaterto
protectthecoilagainstfrost.Thisfrostprotectionisalsoactivatedwhentherunningmodeis“off”.
Coilswith3rowsormoremustalwaysbeconnectedincounter
flowtotheairflow.
NOTE:Ifglycolisadded,theglycolmustbewithoutadditivesandautoglycolmustnotbeused.Automatic
bleedinghastobeinstalledatthehighestpointofthe2pipes—supplyorreturnpipe.
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Iftheheatingbatteryisbuiltwith3ormore
rows,thewaterflowmustbeinc ounterflowtothedirection
oftheair.
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