........................3
Operating Your Friedrich Air Cleaner .........................................................................................................................4
Cleaning ....................................................................................................................................................................4
Important Precautions ..................................................................................................................................4
Cleaning the Pre-Filter .................................................................................................................................5
Cleaning the Carbon Filter ...........................................................................................................................5
Cleaning the Electronic Cell .........................................................................................................................5
Alternate Cell Cleaning Method ...................................................................................................................6
Discoloration of the Cell ............................................................................................................................................6
Replacing the Cell in Cabinet ....................................................................................................................................6
Activated Carbon Filter ..............................................................................................................................................7
Consumer Troubleshooting Guide .............................................................................................................................7
Major Components Diagram .....................................................................................................................................8
Speci cations ............................................................................................................................................................8
If You Need Service ...................................................................................................................................................9
Regional C-90A Warranty Repair Stations ................................................................................................................9
Electronic Air Cleaner Warranty ..............................................................................................................................10 3
920-010-05 (11-04)
The Friedrich Electronic Air Cleaner is a self-contained console model consisting of a high
voltage DC power supply, electronic cell, 3 speed fan, pre- lter and activated carbon post-
lter in a rugged plastic cabinet.
It is designed to remove dust, tobacco smoke, pollen, bacteria and other airborne contaminants
from the air. In just minutes, you will notice improvements in your indoor air quality as your
Friedrich air cleaner begins the job of removing the billions of irritating microscopic particles
from your home or of ce. The activated carbon post- lter also helps eliminate many
objectionable indoor odors.
Carry unit by handle indentations on side panels or carry from base, as the top removes
for lter maintenance and will not support the unit.
Remove the plastic cover from the activated carbon lter, and place the lter with label
facing out.
Make sure the electronic cell is properly placed in the cabinet - air ow arrow on the end
plate should be pointing toward the fan.
Make sure that the top cover is securely in place.
This unit is equipped with a three-prong (grounded) plug for your protection against shock
hazards and should be plugged directly into a properly grounded three-prong receptacle.
DO NOT, UNDER ANY CIRCUMSTANCES, CUT OR REMOVE THE GROUNDING
PRONG FROM THIS PLUG.
Electronic air cleaners should NOT be placed in any area where potentially dangerous
gasses or vapors exist, nor should they be used in wet environments.
The Friedrich
C-90A Electronic
Air Cleaner
CAUTION:
Before operating
the unit
Pre-Filter
Ionizing Section
of Electronic Cell
Collector
Plates
3-Speed Fan
Carbon Filter 4
920-010-05 (11-04)
CONTROLS
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 and LOW.
An indicator lamp lights when the cleaner is on and operating normally.
Generally, HIGH fan speed is used in extreme conditions for rapid cleaning; such as during
or after a party where there were many smokers; or for larger areas to circulate the clean
air in all areas of the room. MEDIUM and LOW settings are usually adequate to maintain a
clean air environment.
At initial start-up, the indicator lamp may icker on and off and is not cause for alarm.
Should the lamp completely fail to come on, review the "BEFORE OPERATING" and
"TROUBLESHOOTING" sections.
During initial use, snapping sounds may be heard. This is normal, and the unit may continue
to make these noises during the rst few days of operation. After this initial break in period,
only an occasional "snap" will be heard, indicating the unit is cleaning your air. NOTE: As the
air cleaners electronic cell becomes dirty, it will "snap" more frequently. When this occurs,
you should wash the cell.
The best location for the air cleaner is a place closest to the source of tobacco smoke, dust
or other indoor contaminants.
Position the unit so that the air ow around the intake and discharge grilles is not blocked.
For best results, do not place the intake grille (rear) closer than eight (8) inches 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 air ow into the adjacent room to
promote good air circulation.
ECONOMICAL CLEAN AIR
The Friedrich electronic air cleaner costs no more to operate than a standard household light
bulb. The bene 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.
IMPORTANT PRECAUTIONS
The collector plates of the electronic cell and the pre- lter can become extremely dirty. With
an excessive amount of contamination buildup on the collector plates and the pre- lter, the
electronic air cleaners ef ciency decreases. Also, as dirt builds up on the ionizing wires, the
charging process becomes less ef cient.
To prevent this loss of ef ciency, the electronic cell and pre- 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.
Turn off and unplug air cleaner before opening top cover to remove electronic cell and pre-
lter for cleaning. Always be careful when handling the electronic cell. Sharp edges and
wires are capable of in icting wounds. Care should also be taken when cleaning because
of extremely hot water and potentially harmful effects of detergents on your skin.
Operating
Your Friedrich
Electronic
Air Cleaner
Cleaning
W
a
l
l 5
920-010-05 (11-04)
CLEANING THE PRE-FILTER
Remove the pre- lter and shake out or brush off the accumulated dust and lint. If this is
not adequate, a vacuum may be used or the pre- lter can be cleaned with an all-purpose
cleaning agent to remove tobacco smoke and cooking grease stains. A thorough rinsing is
required after each cleaning. After cleaning, allow to dry and reinsert.
CLEANING THE CARBON FILTER
Occasionally, the carbon 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 lter can no longer remove odors from the air, it must
be replaced. (See Carbon Filter Reorder Form packed with this unit or contact your nearest
Friedrich dealer.) Under normal operating conditions the carbon lter should be replaced
every 3-6 months. THE CARBON FILTER MUST BE IN PLACE FOR THE AIR CLEANER
TO OPERATE.
CLEANING THE ELECTRONIC CELL
The simplest method of cleaning the electronic cell is to use an automatic dishwasher. The
dishwasher provides the correct cycle of wash, rinse and dry. Water temperatures normally
found in dishwashers will not harm the cell.
1. After turning off the air cleaner, remove the cell and gently place on the dishwasher rack
with air ow arrows pointing up. In some dishwashers, it may be necessary to remove
the top rack. BE EXTREMELY CAREFUL WHEN PLACING ON DISHWASHER
RACK TO NOT DAMAGE IONIZER WIRES OR BEND COLLECTOR PLATES.
2. Use any available household dishwasher detergent recommended for use in your
appliance and follow manufacturers instructions.
3. Not all dishwashers may be capable of holding the electronic cell. Be sure to compare
the internal size of the dishwasher to the dimensions of the electronic cell (16" high x
12 1/2" wide x 4 1/2" deep.) All parts of the dishwasher must be able to move freely.
4. Take care to avoid damaging the cell when removing it from the dishwasher. GENTLY
LIFT THE CELL STRAIGHT UP TO PREVENT DAMAGE TO IONIZER WIRES AND
COLLECTOR PLATES.
5. The cell may be hot when removing it from the dishwasher. Allow to cool or wear
protective gloves. Make sure