USER MANUAL DV WITH CONTROLLER VERSION 1.01.13 90925372

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i.4.4.3.2Pipeconnectiontocoolingcoilsforchilledwater
Coilswith3rowsormoremustalwaysbeconnectedincounterflowtotheairflow.
NOTE: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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Toprotectagainstfrostatemperature
sensorforthetransmissionofan
analogsignaltothecontrollerisplaced
inapipeonthecollectionpipefor
returnwater.Thesensormustbe
fittedwatertightwithacapinthepipe
beforewaterunderpressureisinthe
battery.The
pipeforthesensoris
solderedonthecollectionpipeanditis
importanttoholdcontraonthepipe,
whenthecapistightened.
Batteryseenfromabove.Thesensor
measuresthewatertemperatureof
thewaterinsideoneofthesmallpipes
forreturnwaterinthebattery.The
sensorreducestheareainthispipe
andherebyalsotheflowofwarm
waterinthispipe.Thetemperaturein
thispipeisreduced
morethanthe
temperatureinallotherpipesbythe
airflowthroughthebattery.Because
thelowesttemperatureinthebattery
probablyismeasuredhere,thissystem
createsearlyandsafewarningoffrost.
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Itisimportantthatthecapistightened
sufficienttokeepthesensorsystem
fullywatertight.