Friedrich C-90B Manuale Utente

4

Electronic air cleaners are an extremely effi cient, cost effective method of removing indoor air contaminants. Unlike standard 
media that merely block relatively large particles, electronic air cleaners attract and hold particles so small that an electron 
microscope is needed to see them.

The PRE-FILTER catches lint, hair and other large  
particles, as room air is drawn in through the rear 
grille by the powerful  3-SPEED FAN.

In the IONIZING SECTION of the ELECTRONIC 
CELL, billions of microscopic particles, too small to 
be caught by the pre-fi lter, become electronically 
charged as they pass through a powerful electric 
fi eld.

COLLECTOR PLATES immediately attract and 
hold these "charged" particles much like metal 
fi lings are attracted to a powerful magnet. The 
accumulated particles are permanently removed 
from the air and cling to the metal plates until 
washed off.

Finally, an ACTIVATED CARBON FILTER removes 
most household odors and fumes as the clean air 
is circulated back into the room.

Turn off air cleaner before opening top cover to remove 
electronic cell and pre-fi lter for cleaning. Always be careful 
when handling the electronic cell. Sharp edges and wires 
are capable of infl icting wounds. Care should also be taken 
when cleaning because of extremely hot water and potentially 
harmful effects of detergents on your skin.

The collector plates of the electronic cell and the pre-fi lter 
can become extremely dirty. With an excessive amount of 
contamination buildup on the collector plates and the pre-fi lter, 
the electronic air fi lter's  effi ciency decreases. Also, as dirt 
builds up on the ionizing wires, the charge process becomes 
less effi cient.

To prevent this loss of effi ciency, the electronic cell and pre-
fi lter must be cleaned regularly. How often will depend on 
actual usage. Cleaning will be more frequent if the air cleaner 
is operated continuously or under severe conditions.

Remove the pre-filter and shake out or brush off the 
accumulated dust and lint. If this is not adequate, a vacuum 
may be used or the pre-fi lter can be cleaned with a mixture 
of water and an all-purpose alkaline detergent-based cleaner 
to remove tobacco smoke and cooking grease stains. A 
thorough rinsing is required after each cleaning.

After cleaning, allow to dry completely and reinsert.

Occasionally, the carbon fi lter will need cleaning. Use a 
stream of air or a vacuum to remove the dirt. THE CHEMICAL 
AND ODOR ABSORPTION CAPABILITIES CAN NOT BE 
RESTORED. When the carbon fi lter can no longer remove 
odors from the air, it must be replaced (Friedrich part number 
616-420-01). THE CARBON FILTER MUST BE IN PLACE 
FOR THE AIR CLEANER TO OPERATE.