Friedrich C-90B Manuale Utente

3

•  Remove the plastic cover from the activated carbon fi lter 

and install in unit.

•  Position the pre-fi lter at the rear of the unit (closest to the 

electronic cell) and the carbon fi lter at the front (where air 
comes out.)

•  Make sure the electronic cell is properly placed in the 

cabinet (airfl ow arrow on the end plate should be pointing 
toward the fan).

•  Make sure that the top cover and carbon air fi lter are 

securely in place.

•  This unit is equipped with a grounded plug for your 

protection against shock hazards and should be plugged 
directly into a properly grounded receptacle.

•  Electronic air cleaners should NOT be placed in any area 

where potentially explosive gases or vapors exist, nor 
should  they  be  used  in  wet  environments.  These  units 
should be operated in air-conditioned environments

The best location is a position closest to the concentration of 

tobacco smoke or dust producing activities.

Position the unit so that the airfl ow around the intake and 
discharge  grilles  is  not  blocked.  For  best  results,  do  not 
place the intake grille (rear) closer than 8" (18 cm) from a 
wall. Provide a clear, unobstructed path for the discharge 
air. The farther the discharge air travels, the greater the 
effectiveness of the air cleaner. For greater comfort, position 
the air cleaner so that the discharge air does not cause 
uncomfortable drafts.

To use a room air cleaner most effectively in rooms that 

share an open doorway or archway, position the unit near 
the common opening and direct the airfl ow into the adjacent 
room to promote good air circulation.

The Friedrich electronic air cleaner costs no more to operate 

than a standard household light bulb. The benefi ts from 
clean air far outweigh the low operating costs of continuous 
cleaning. Remember, the more you operate your electronic 
air cleaner, the cleaner your air will be.  

All controls for the Friedrich electronic air cleaner are located 

on the top of the unit and are accessible through an opening 
in the top cover. The controls are OFF - HI -MED - LOW. 
Plus, an indicator lamp shows when the cleaner is on and 
operating normally.

Generally, HIGH fan speed is used in extreme conditions for 

rapid cleaning, such as after a party where there were many 
smokers; or for large areas where HIGH fan is required to 
circulate the clean air into all areas of the room. MEDIUM 
and LOW settings are usually adequate to maintain a clean 
air environment.

The indicator lamp may fl icker on and off and is no cause for 

alarm. Should the lamp completely fail to come on, review 

"BEFORE OPERATION" and "TROUBLESHOOTING" 

sections.

During the initial use,  random "snapping" sounds may be 
heard. This is normal and the unit may continue to make 
these  noises the fi rst few days of operation. After the initial 
break-in  period,  only  an  occasional  "snap"  will  be  heard, 
indicating the unit is cleaning your air. NOTE:  As the air 
cleaner electronic cell becomes dirty, it will “snap” 
more frequently. When this occurs, you should consider 
washing the cell.