KA IMO 2021 6 V2.1

systemair 29
3. COMMISSIONING AND MAINTENANCE
Caution
Theunitcommissioningmayonlybecarriedoutbyaqualiedprofessional.Beforestartinguptheair
handlingunit,checkalltheelectricalconnectionsandunitcontrolsettings.
3.1 General instructions
Before maintenance
• Thepowersupplymustbeswitchedoffcompletelyandtheserviceswitchmustbeswitchedoffandlocked.
• Due to the frequency converter, it is necessary to wait at least 15 minutes.
• Itisnecessarytocheckwhetherallrotatingpartsarestationary(fan,belts,rotaryheatexchanger,blinds).
• Itisnecessarytocheckwhetherthetemperatureintheheatexchangersandhydraulicsystemshasadaptedtothe
ambient temperature.
• ThePMmotorshaftmustbeblocked.Externalinuencesonmotorrotationgenerateelectriccurrent.
• The unit must not be in an explosive atmosphere during service.
• Protectiveclothingandfootweararerequired(helmet,maskforchanginglters,glovesandshoes…).
• Allserviceaccessoriesisrequired:tools,serviceswitchlockkey…
• As the entire electrical installation is switched off during servicing, external, separate lighting is required.
• Aspecialkeyisrequiredtoopenandclosetheservicedoor.
After maintenance
• Clean any dirt from maintenance.
• Checkthatallmechanicalandelectricalcomponentsareinplaceandsecurelyfastened.
• Makesurethatnooneisinthedangerareaofthedeviceoritssurroundings.
• Makesureyouhaveremovedalltoolsorotherobjectsfromthedevice.
• Closetheservicedoorandlockthehandlelocks.
During maintenance
• Checktheconditionofthesection.Incaseofdirtorcorrosion,immediate
cleaning is required.
• Checkthegasketatthecontactofthepanelordoorandcasing.Ifthegasketis
damaged or detached, it must be completely removed, the surface cleaned and
gasketreplaced.