42MAINTENANCE BEFORE BEGINNING MAINTENANCE WORKThe safety switch (S) automatically turns off the power when the door of the unit is opened.WARNINGAlways disconnect the power plug before starting the ventilation unit maintenance.There are two unit models, left- (L) and right-handed (R). The figure shows the right-handed model.REPLACING THE FILTERS (USER)When the maintenance reminder becomes activated, checkthe cleanliness of the filters and replace them if required.The Vallox ventilation unit has three air filters:• Class G4 coarse filter filters insects, heavy pollen andother relatively large foreign objects out of the outdoorair.• Class F7 fine filter filters microscopic pollen and dustparticles out of the supply air.• Class G4 coarse filter filters the extract air and keeps theheat recovery cell clean.The filter replacement interval depends on the ambient dustconcentration. It is recommended that the filters be replacedevery spring and autumn, or at the very least once a year.NOTEUsing original Vallox filters ensures that the ventilation unitremains in top condition, giving the best results.CBSA
