USER MANUAL DV WITH CONTROLLER VERSION 1.01.13 90925372
45
k.6.12Temperaturesensors
Foursensorsarealwaysdeliveredwitheachunit.Seebelowwherethesensorsareplaced;
1sensorintheextractair,installedinsidetheunit
1sensorintheoutdoorair,installedinsidetheunitbeforethesupplyairfilteronthecoldsideof
the
heatexchanger
1sensorinthesupplyairtobeplacedinthesupplyairductbytheinstaller
1sensorintheexhaust,installedinsidetheunit
k.6.13Dampermotors
Fourdifferenttypesofdampermotorsareavailable;
On/offdampermotor,withoutspringreturnfunction.Torque
is20Nmandruntimeis150seconds
Modulatingdampermotor,withoutspringreturnfunction.Torqueis20Nmandruntimeis150
seconds
On/offdampermotor,withspringreturnfunction.Torqueis20Nmandruntimeis150/16seconds
Modulatingdampermotor,withspring
returnfunction.Torqueis20Nmandruntimeis150/16
seconds
k.6.14Filterguards
Filterguardoverpre‐filterandprimaryfilterinstalledandconnectedtothecontrollerfordisplayofalarm
whenthemechanicallysetlimitisexceeded.FilteralarmwillbedisplayedontheSystemairControlPanel.
k.6.15Roomtemperaturesensors
Oneortwoexternalroomtemperaturesensorsareavailable.Thecabinethasbeenpreparedwith
additionalterminalsforconnectionoftheroomtemperaturesensors.Thesensorsaredeliveredwithout
cable.Thecontrollercalculatesanaverageofthevaluefromthe2sensorsasinputforthecontrol.
k.6.16Frostprotection
Forthefrostprotectionoftheheatingcoil,thewatertemperatureinthecoilistransmittedtothe
controllerbyatemperaturesensorinawaterreturncircuitofthecoil.Thecontrolleralwaysgeneratesa
signaltothevalvemotorthatkeepsasufficientflowof
hotwatertoprotectthecoilagainstfrost.Thisfrost
protectionisalsoactivatedwhentherunningmodeis“off”.
Ifthewatertemperaturefallsbelowthesetpointtemperaturethefansstop,thedampersclose,andan
alarmisactivated.
FromSystemaireveryheatingcoilforhotwaterisprovided
withalittlepipeatthecollectionpipeforthe
returnwater.Thislittlepipeispreparedfortheinstallationoftheabovementionedtemperaturesensorfor
thetransmissionofthereturnwatertemperaturetothecontroller.
k.6.17SystemairControlPanel‐SCP
Theseparatecable‐connected(10m)handterminalwith
displayandbuttons–theSystemairControlPanel
isalwaysnecessaryforthenormalhandlingandprogramming,becausethemainSystemairE28controller
iswithoutdisplayandbuttons.
k.6.18Coolingrecovery
Iftheextractairtemperatureislowerthantheoutdoorairtemperature,andthereisacoolingdemandin
the
rooms,thecoolingrecoverywillbeactivatedbyreversingtheheatexchangersignal.Thesignalis
increasedtothecoolingrecoverybyincreasingcoolingdemand.