Service & Parts Manual
C-90B Electronic Air Cleaner
C90B-Svc (3-06)
TABLE OF CONTENTS
Friedrich Electronic Air Cleaner .................................................................................................................................... 2
Specifi cations ................................................................................................................................................................ 2
CAUTION - Before Operation ........................................................................................................................................ 4
Operating Your Friedrich Air Cleaner ............................................................................................................................ 4
How Electronic Air Cleaners Work ................................................................................................................................ 5
Cleaning
Important Precautions ...................................................................................................................................... 5
Cleaning the Pre-Filter ..................................................................................................................................... 5
Cleaning the Carbon Filter ............................................................................................................................... 5
Cleaning the Electronic Cell ............................................................................................................................. 6
Alternate Cell Cleaning Method ........................................................................................................................ 6
Discoloration of the Cell ................................................................................................................................................ 6
Replacing the Cell in Cabinet ........................................................................................................................................ 7
Activated Carbon Filter .................................................................................................................................................. 7
Consumer Troubleshooting Guide ................................................................................................................................. 7
Troubleshooting Electronic Air Cleaner ......................................................................................................................... 8
Wiring Schematic .......................................................................................................................................................... 9
Major Components ........................................................................................................................................................ 10
C-90B Electronic Air Cleaner Component Parts List .................................................................................................... 11
Authorized Warranty Repair Stations ............................................................................................................................ 12
FRIEDRICH C-90B ELECTRONIC AIR CLEANER
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-fi lter and activated carbon
post-fi lter in a rugged plastic cabinet.
It is de signed to remove dust, tobacco smoke, p ollen, bacter ia,
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 offi ce.
The activated carbon post-fi lter also helps eliminate many
objectionable indoor odors.
SPECIFICATIONS
OPERATING TEMPERATURES
This air cleaner is intended for use at temperatures
normally found in conditioned, occupied spaces.
Cabinet 19" 15" 21 1/2"
ELECTRICAL RATINGS
115 Volt, 60 Hertz.
INDICATOR LIGHT
Located on the top access cover, next to 3-speed
switch. Indicates air cleaner operating properly.
INTERLOCK SWITCH
Interrupts supply power to unit when access cover
is opened or carbon fi lter is removed.
WEIGHT
35 lbs. shipping weight
30 lbs. net weight
Cell 16" 12 1/2"4
Pre-Filter 15
Carbon Filter 15
NOMINAL CURRENT AND POWER CONSUMPTION
Power Supply
High Speed 390 .80 90
Medium Speed 280 .56 64
Low Speed 220 .41 47
DIMENSIONS
Height Width Depth
7
/8"12
7
/8"12
120 Volt, 60 Hertz
CFM Amps Watts
3
/4"
3
/4"
1
/2"
1
/4"
1
/4"
2
CAUTION - READ BEFORE OPERATION
• 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
OPERATING YOUR FRIEDRICH AIR CLEANER
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 - LOW.
Plus, an indicator lamp shows when the cleaner is on and
operating normally.
Generally, HIGH fan speed is used in ex treme 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.
LOCATION
The best location is a position closest to the c onc entration 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.
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.
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.
ECONOMICAL CLEAN AIR
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.
3
HOW ELECTRONIC AIR CLEANERS WORK
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
1
2
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.
1
2
3
4
3
4
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.
CLEANING
IMPORTANT PRECAUTIONS
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.
Pre-Filter
Ionizing
Section of
Electronic
Cell
Collector
Plates
Carbon
Filter
CLEANING THE PRE-FILTER
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.
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 prefi 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.
4
After cleaning, allow to dry completely and reinsert.
CLEANING THE CARBON FILTER
Occasionally, the carbon fi lter will need cleaning. Use a
stream of ai r or a vacuum to remove the dir t. THE CH EMICAL
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.
CLEANING (CONTINUTED)
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 150°F to 170°F will not harm the cell.
1. After turning off the air cleaner, remove the cell and gently
place on dishwasher rack with airfl ow ar rows pointing up.
In some dishw ashers, it may be neces sar y to remov e 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
manufacturer's 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 removed from the dishwasher.
Allow to cool or wear protective gloves. Make sure that
all water is drained off when removing the cell from the
dishwasher.
ALTERNATE CELL CLEANING METHOD
If an automatic dishwasher is not available or not of suffi cient
size to accommodate the cell, a large container capable of
holding the electronic cell can be used.
1. Mix an alkaline detergent with hot water in a ratio of 4
oz. of detergent to 1 gal. of water. Water temperature
should be between 150°F and 170°F. Be careful to avoid
prolonged skin contact with solution and DO NOT splash
solution in the eyes.
2. Soak the cell in the solution for about 15 minutes. The
solution should be agitated in some way every 2 to 3
minutes by sloshing or stirring the solution.
3. Remove the cell from the cleaning solution and place in
a clean container of hot water 150°F to 170°F for rinsing
and let set for 10 minutes.
4. Remove the cell from the rinse water and allow to drain
and dry before using.
5. If there is any detergent residue remaining, rinse again,
since it may affect the effi ciency of the air cleaner.
NOTE: The ionizer wires may become so dirty that an
occasional cleaning is recommended. With a damp cotton
ball, wipe the ionizer wires by placing the wire between fi nger
and thumb.
6. If dirt stains or detergent residue remain after washing,
it may be necessary to rewash the cell or switch
detergent.
DISCOLORATION OF THE CELL
Occasionally, after the cleaning process, the cell may seem
stained. If the stain is black or very dark, it is probably
detergent residue and should be rinsed off at once. If yellowing
appears, it is probably stain from tobacco or other smoke.
The yellowing does not affect air cleaning effi ciency. Use an
ammonia based or butyl based detergent to clean tobacco
tar and other smoke residue from the collector plates.
5
REPLACING THE CELL IN CABINET
After the cell has been washed, check for broken ionizer wires
and bent collector plates. If broken wires are observed, return
unit to Authorized Warranty Station for wire replacement. If
bent collector plates are observed, carefully straighten with
seems stuck when being inserted or the access cover will not
fi t securely, check to be sure that the cell is being positioned
properly. If excessive force is used, the cell or air cleaner unit
could be damaged. Airfl ow arrows point toward fan motor.
a screwdriver or other fl at object. BE CERTAIN THAT NO
TWO COLLECTOR PL ATES ARE TOUCHING AS THIS
WILL CAUSE ARCING AND PREVENT THE AIR CLEANER
FROM OPERATING PROPERLY.
If the cell is placed into the air cleaner while still damp, the
indicator light may not come on until the cell is dry, which would
normally take about two hours. If the cell is energized and
annoying snapping sounds occur, the cell should be removed
Remember that the electronic air cleaner has a cell key which
from the air cleaner and allowed to thoroughly dry.
prevents the cell from being positioned incorrectly. If the cell
ACTIVATED CARBON FILTER
The activated carbon fi lter should be replaced when it is no
longer effective in eliminating odors. The life of the carbon
fi lter will depend on the concentration of odors and fumes
in the air passing through the air cleaner. Under normal
circumstances, the carbon fi lter should last up to six months.
THE CARBON FILTER MUST BE IN PLACE FOR THE AIR
CLEANER TO OPERATE.
CONSUMER TROUBLESHOOTING GUIDE
In the event that you experience problems with the operation of your air cleaner, please...
• Make sure electronic cell is clean, dry and properly
installed.
• Make sure pre-fi lter and carbon fi lter are both properly
installed.
• Check fan motor and indicator lamp on all speed settings
starting with low.
If your air cleaner still has any of the following problems,
proceed step by step as shown below until no further action
should be taken.
• Make sure the top cover is properly snapped in place.
PROBLEM 1
FAN OFF
LAMP OFF
Make sure the supply cord is plugged
into a standard household receptacle.
Make sure there is voltage to the receptacle by testing with another electric
device.
Make sure the carbon fi lter is in place.
Make sure the top access cover is
properly in place in order to actuate the
interlock switch. The interlock switch is
provided for consumer safety and should
never be bypassed.
PROBLEM 2
FAN ON
LAMP OFF
Check the electronic cell to see if any
of the collector plates are touching.
Gently straighten and evenly space
the plates.
Check the electronic cell to see if any
of the ionizer wires are broken. See
Major Components for their location. If
broken wires are observed, no further
corrective actions should be taken by
the consumer. Return the unit to an
Authorized Warranty Station for repair.
See Page 12.
PROBLEM 3
FAN OFF
LAMP ON
This condition represents a failure of
the air cleaner. Return the unit to an
Authorized Warranty Station for repair.
See Page 12.
No further corrective actions should be
taken by the consumer. Return the unit
to an Authorized Warranty Station for
repair. See Page 12.
6
TROUBLESHOOTING ELECTRONIC AIR CLEANER
Electrical Troubleshooting Procedure for Electronic Air Cleaner
START
Make sure electronic cell is clean,
dry and properly
installed
Make sure pre-fi lter and activated carbon fi lter are properly
installed, and carbon fi lter is
activating fi lter interlocking
switch lever.
Check Line 120
Replace the access
cover and turn the air
cleaner on. Check Low,
then Med, then Hi on
multispeed fan.
Both
Off
Check fan and
neon light.
Both
Off
Push interlock
switch with plastic
handled screwdriver. Short from
cell frame to a hot
collector plate.
Arcing
Yes
Electronic
Air Cleaner is
OK.
Light
On
Fan
On
Arcing
No
VAC power. Cor-
rect as needed.
Jumper fan
switch contacts
- For each speed
Inspect cell for
- Bent Collector Plates
- Broken Ionizer Wires
- Dirt on Insulators
- Damaged or dir ty
Contact Tabs
Fan
On
in turn on
speed fans.
Remove cell.
Replace access
cover, Check
neon light.
multi-
Light
Off
No cell damage noted
120 VAC Present
Replace Switch
Tur n OFF p ower. M a ke
Fan
Off
Light
Off
Cell
Damaged
sure shaft on fan motor
rotates freely. Check for
open windings. Replace if
necessary.
Remove access
cover. Check
for correct input
voltage: 120 VAC.
Models P1 and P2
terminals on
power supply.
TO USE THIS CHART:
1. Follow the steps in order. Don't skip around.
2. Each time you isolate and fi x a problem, go back to
START.
3. Repeat ALL the steps until the air cleaner checks out OK
WARNING
Some of these steps expose dangerous high
voltage. Only a qualifi ed service technician
should attempt this procedure.
Repair or
replace cell
Check fi lter Interlocking Switch,
Access Cover
Interlocking
Switch, System
Switch.
Voltage
correct
Voltage NOT
Correct
Check 100 VDC
voltage across
terminal on lamp.
Check wiring back
through switch, power
cord, and outlet to circuit breaker or fuse.
Lamp
On
Fan
Off
Lamp
Off
Fan
On
Voltage
Below
70 VDC
Voltage above 120 VDC
Replace Light
Replace System Switch or
fan motor.
Light OK, replace
complete power
supply
With Ohmmeter, check
for short between
- Cell Frame and Ionizer
Section
- Cell frame and Collector Section
Infi nite
Resistance
Cell OK
WARNING
Electronic components on power supply
board are not fi eld replaceable. Attempted service will damage the board.
Cell
Shorted
Replace Cell
Check Contact Board for
coating on ground contacts
Clean
Check wire connections
are secured properly
OK
Replace Power Board
Assembly
Dirty
Clean contacts with fi ne
grain sandpaper or emery
cloth.
7
C-90B ELECTRONIC AIR CLEANER COMPONENT PARTS LISTING
PART NO. DESCRIPTION QTY.
616-203-01 FILTER, PRE ............................................................................................................. 1
616-420-01 FILTER, CARBON .....................................................................................................1
616-424-05 CARTON, RSC .......................................................................................................... 1
616-425-00 PACKING, TOP & BOTTOM ...................................................................................... 2
920-010-01 OWNERS MANUAL C-90B ....................................................................................... 1
616-209-01 BUTTON, SYSTEM SWITCH .................................................................................... 4
616-211-01 SIDE, CABINET ......................................................................................................... 2
616-212-01 LID, CABINET ........................................................................................................... 1
906-081-00 SCREW, #4 - 24 X 3/4" .............................................................................................. 2
616-210-01 BASE, CABINET ....................................................................................................... 1
906-080-00 SCREW .................................................................................................................... 10
917-018-00 STRAIN, RELIEF ....................................................................................................... 1
605-420-10 FAN, 6 BLADE ........................................................................................................... 1
616-217-00 ORIFICE .................................................................................................................... 1
616-410-00 BLADE COVER ASSEMBLY ..................................................................................... 1
619-893-02 PANEL, CONTROL .................................................................................................... 1
906-022-08 SCREW, SELF-TAPPING .......................................................................................... 2
906-051-00 SCREW, TAPPING 8A X 3/8 H/W SER ZP ............................................................... 5
906-051-00 SCREW, T/C 8-32 X 3/8 H/W SER ZP ...................................................................... 5
605-000-96 SUPPLY CORD ......................................................................................................... 1
610-714-74 MOTOR ..................................................................................................................... 1
616-201-02 POWER SUPPLY ...................................................................................................... 1
616-202-01 CONTACT BOARD .................................................................................................... 1
616-207-00 SWITCH, SYSTEM .................................................................................................... 1
616-215-00 SPRING, CELL GROUND ......................................................................................... 1
616-219-00 SWITCH, INTERLOCK .............................................................................................. 1
616-220-00 LIGHT INDICATOR ....................................................................................................1
616-224-00 WIRE ......................................................................................................................... 1
616-224-01 WIRE ......................................................................................................................... 1
616-224-02 WIRE ......................................................................................................................... 1
616-224-03 WIRE ......................................................................................................................... 1
616-224-04 WIRE ......................................................................................................................... 1
616-225-00 PLUG ASSEMBLY ..................................................................................................... 1
616-402-00 CAP ASSEMBLY .......................................................................................................1
616-977-00 TWIST LOK STANDOFF ........................................................................................... 3
616-421-06 BRACKET, GRILLE ASSEMBLY ............................................................................... 2
619-980-00 RIVET, ALUMINUM .................................................................................................. 10
616-213-00 IONIZER/COLLECTOR CELL ................................................................................... 1
616-556-00 IONIZER WIRE .......................................................................................................... 9
616-204-00 SWITCH, FILTER INTERLOCK ................................................................................. 1
616-931-00 BRACKET, MOTOR MOUNT ..................................................................................... 1
250-346-01 LID STRIKER ............................................................................................................ 2
8
MAJOR COMPONENTS
9
WIRING SCHEMATIC
10
REGIONAL C-90B AUTHORIZED WARRANTY REPAIR STATIONS
7
6
Cagle's Appliance
1
114 S . C am pu s A v e .
Ontario, California 91761
TEL: (909) 986-9789
Alamo Service Co.
2
1450 North Flores
San Antonio, Texas 78212
TEL: 210/227-7571
(800) 328-2450
B & G Service Co.
3
3950 North Elston
Chicago, Illinois 60618
TEL: (773) 588-2290
Reeve Air Conditioning, Inc.
4
2501 South Park Road
Hallandale, Florida 33009
TEL: (954) 962-0252
(800) 962-3383
Weston Bros., Inc.
5
99-16 Metropolitan
Forest Hills, NY 11375
(718) 793-2000
Thermal Products
6
271 Plauche Street
Harahan, Louisiana 70123
TEL: (506) 818-1008
Carroll Serv. Inc.
7
4000 Shenandoah
St. Louis, Missouri 63110
(314) 371-3033
Friedrich Air Conditioning Company
P.O. Box 1540
San Antonio, TX 78295
210.357.4400
www.friedrich.com
ELECTRONIC AIR CLEANER
LIMITED WARRANTY
Friedrich Air Conditioning Company warrants its electronic air cleaner to be free from defects in workmanship or materials, under
normal use and service, for a period of One Year from the date of purchase by the original owner. If at any time during the warranty
period, the product is found to be defective or malfunctions, Friedrich Air Conditioning Company will repair or replace the defective
part (at its option) and provide the shop labor to repair this electronic air cleaner.
This warranty shall not apply if it is shown by FRIEDRICH that the defect or malfunction was caused by neglect or abuse during
operation by consumer.
The cost of shipping the unit to Friedrich Air Conditioning Company or a service agency shall be covered by the purchaser. The
repaired or replaced part or unit will be shipped by Friedrich Air Conditioning Company to the purchaser, freight prepaid. The
warranty on any repaired or replacement part shall be for a duration of time no longer than the remaining or unexpired term of the
original warranty.
This warranty does not cover any other charges incurred by the purchaser.
The sole responsibility of FRIEDRICH shall be to repair the product within the terms stated above. FRIEDRICH SHALL NOT BE
LIABLE FOR ANY CONSEQUENTIAL DAMAGES RESULTING FROM ANY BREACH OF WARRANTY, EXPRESS OR IMPLIED,
APPLICABLE TO THIS PRODUCT. Some states do not allow the exclusion or limitation of consequential damages, so this
limitation may not apply to you.
THIS WARRANTY IS IN LIEU OF ALL OTHER WARRANTIES, EXPRESSED OR IMPLIED, AND THE WARRANTIES OF
MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE HEREBY EXCLUDED BEYOND THE ONE YEAR
DURATION OF THIS WARRANTY. Some states do not allow limitations on how long an implied warranty lasts, so the above
limitation may not apply to you.
This warranty gives you specific legal rights, and you may also have other rights which can vary from state to state.
(10-04)
FRIEDRICH AIR CONDITIONING CO.
Post Office Box 1540 · San Antonio, Texas 78295-1540
4200 N. Pan Am Expressway · San Antonio, Texas 78218-5212
(210) 357-4400 · FAX (210) 357-4480
www.friedrich.com
Printed in the U.S.A.
C90B-Svc (3-06)
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