Honeywell F90a1050 Owner's Manual

F90A,B

Self-Contained

Commercial Electronic Air Cleaner

PRODUCT DA T A

FEATURES

• Removes up to 95 percent of the staining dirt from the air,
as measured by the Initial Dust Spot Method using
atmospheric dust; refer to the American Society of
Heating, Refrigerating, and Air Conditioning Engineers
(ASHRAE) Standard 52-76.

• Provides Coanda air distribution by drawing in dirty air
from below, cleaning it electronically, and discharging the
clean air in four directions parallel with the ceiling.

• Three-speed fan circulates up to 1250 cfm (35 m3/min) for
F90A and 550 cfm (15.5 m3/min) for F90B.

• Solid state power supply is self-regulating, maintains peak
efficiency over a wide range of cell dirt loading conditions,
and provides nonlethal current levels.

• Interlock switch prevents operation when the cover is
open or the grille is not in place.

• Heavy duty commercial cells, prefilter, and grille are
removable for cleaning.

• Three-position adjustable discharge louvers control the

APPLICATION

The F90A,B Self-Contained Commercial Electronic Air
Cleaners are ceiling-mounted and remove airborne
contaminants such as tobacco and cooking smoke, dust,
pollen, bacteria, and larger viruses from the air circulated
through the unit.

direction of discharged air.

• Light emitting diodes (LEDs) indicate ON and CHECK;
WASH LED optional.

• Test button shows presence of high voltage.

• Available with gray finish or woodgrain with black trim.

• Optional hard-wired remote control assembly (part number
190097B).

• Optional carbon filters (part number 202614) for ozone
and odor control.

The Honeywell Trademark is used under license from Honeywell
Intellectual Properties, Inc. by Air-Pure Systems.
Honeywell International Inc. makes no representations or
warranties with respect to this product.

READ AND SAVE THESE

•

INSTRUCTIONS

Contents

Application .......................................................................... 1

Features ............................................................................. 1

Specifications ..................................................................... 2

Ordering Inform ation .......................................................... 2

Planning the Installation .................................................... 3

Installation .......................................................................... 6

Checkout ............................................................................ 12

Adjustments ....................................................................... 12

Service ................................................................................ 12

Electrical Troubleshooting ................................................. 16

Replacement Parts List/Exploded View ............................ 2 2

Limited One-Year Warranty ................................................ 2 4

68-0103-6 Revised 11-07

F90A,B SELF-CONTAINED COMMERCIAL ELECTRONIC AIR CLEANER

SPECIFICATIONS

IMPORTANT

The specifications given in this publication do not
include normal manufacturing tolerances. Therefore,
a particular unit may not exactly match the listed
specifications. Also, this product is tested and
calibrated under closely controlled conditions, and
some minor differences in performance can be
expected if those conditions are changed.

Model:

F90A,B Self-Contained Commercial Electronic Air Cleaners.
Contains one or two FC37B heavy duty commercial cells, a
power supply assembly, one or two prefilters, cover with
grille, a power and speed control switch, a performance
selection switch, a test button, a three-speed motor driven
fan, an interlock switch for the cover and grille, a power cord,
and LED indication of system operation.

Color:

Available with gray finish or woodgrain with black trim.

Solid State Power Supply Assembly:

F90A, 120 Vac, 60 Hz: 203361E
F90A, 220/240 Vac, 50 Hz: 203361J

Electrical Ratings:

Voltage and Frequency (specify when ordering):

120 Vac, 60 Hz
220/240 Vac, 50 Hz

Current and Power Consumption:

ledoMgnitteSnaF)A(tnerruC)W(rewoP

IH6.2072

021,A09F

zH06,caV

DEM0.2512
WOL8.1581
IH4.1072

,A09F

,caV052/022

DEM0.1512

zH05

WO

L8.0581

Air Flow Capacity:

ledoMgnitteSnaFmfcm

3

IH05210.53

A09F

DEM02010.92

WOL0080.32

Efficiency:

Up to 92% efficient as measured by the Initial Dust Spot
Method using atmospheric dust, according to the American
Society of Heating, Refrigeration, and Air Conditioning
Engineers (ASHRAE) Standard 52-76.

etunim/

Ambient Temperature Rating:

Shipping and Storage: -20°F to +120°F (-29°C to +49°C).
Operating: The F90 is intended for use at ambient

temperatures that usually are not higher than 90°F
(32°C) but for brief periods, may be as high as 120°F

C

))

(49°

ORDERING INFORMA TION

If you have additional questions, need further information, or would like to comment on our products or services, please write or
phone:

1. Y our local Honeywell Commercial Air Product s Distributor.

2. Air-Pure Systems

16873 Fish Point Rd. SE
Prior Lake, MN 55372-1714
Phone: [phone]
Fax: [phone]

www.cleanairfacility.com

68-0103-6 Revised 11-07

2

F90A,B SELF-CONTAINED COMMERCIAL ELECTRONIC AIR CLEANER

8

(203)

24

(610)

LATCHES

POWER
CORD

1

M919

ALLOW AT LEAST 9 INCHES (229 MILLIMETERS) FROM BACK
OF F90B TO WALL FOR REMOVAL OF COVER.

7 (178)

1

2

2

ALLOW AT LEAST 16 INCHES (406 MILLIMETERS) FROM FRONT
OF F90B TO WALL FOR INSTALLATION AND REMOVAL OF CELLS.

3 (76)

16

(406)

5-3/4 (146)

3-1/4

(83)

29-1/4

(743)

19-1/4 (489)

14-1/2 (386)

Shipping and Installation Weight:

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ytuDyvaeH

lleClaicremmoC

A09F

thgieWgnippihS0.075.13

)hcaE(2.9)hcaE(2.4

thgieWdellatsnI0.565.

Dimensions:

See Figs. 1 and 2.

Approvals:

Underwriters Laboratories Inc. listed: File No. E30954,

Guide No. AGGZ (120 Vac units only).

Canadian Standards Association listed: File No. LR19060

(120 Vac units only).

U.S. FCC Class B limits for RFI, Computing Devices

Rules, Canadian EMI Standard.

Replacement Parts and Accessories:

See Parts List on page 22.

POWER
CORD

7/8 (22) 
DIAMETER 
KNOCKOUT


4

(102)



29-1/4 (743)

24 (610)

16 (406)

92

Fig. 2. F90B installation dimensions in in. (mm).

29-1/4 
(743)

24

16

(610)

(406)

1 INCH RADIUS

LATCHES

5-3/4 (146)

7 (178)

1

2

1

ALLOW AT LEAST 16 INCHES (406 MILLIMETERS) FROM FRONT
OF F90 TO WALL FOR INSTALLATION AND REMOVAL OF CELLS.

ALLOW AT LEAST 9 INCHES (229 MILLIMETERS) FROM BACK
OF F90 TO WALL FOR REMOVAL OF COVER.

Fig. 1. F90A installation dimensions in in. (mm).

2 (51)

M1530

PLANNING THE INST ALLATION

WARNING

Explosion Hazard.
Can cause property damage, severe injury, or
death.

1. Do not install or use the F90 where there is any

danger of gas, vapor, or dust explosion.

2. Do not install or use the F90 if explosion-proof
electrical fixtures are specified.

Application and Operation

The F90 Self-Contained Electronic Air Cleaner is used where

2

overhead air cleaning is required (restaurants, conference
rooms, lounges, and offices).

The F90 provides its own air circulation and is used in any
situation that requires the removal of contamination from an
enclosed area.

The F90 is not explosion-proof. Do not use the F90 where
dangerous levels of potentially explosive gases, vapors, or
dusts are present in the cleaning area.

3

68-0103-6 Revised 11-07

F90A,B SELF-CONTAINED COMMERCIAL ELECTRONIC AIR CLEANER

The F90 is equipped with two standard light-emitting diodes
(LEDs) and one optional LED.

ON LED: Lights when the solid state power supply is

powered and operating normally.

CHECK LED: Lights if the F90 requires service or if the

test button is pressed.

WASH LED (if used): Lights when cell washing is overdue.

To understand the operating sequence of the F90, refer to
Fig. 3.

Determine Number of F90 Needed

The sizing procedure determines the number of F90s needed
for any application. The correct number required for a
particular application depends on:
— type of contamination.
— number of occupants.
— volume of the room.
— use of the room.
— outdoor air quality.

1

AIR CLEANER IS POWERED.

2

FAN DRAWS CONTAMINATED AIR INTO
THE BOTTOM OF THE F90.

3

LARGE PARTICLES ARE CAUGHT IN
THE PREFILTER.

SMALL PARTICLES PASS THROUGH
THE PREFILTER.

This sizing information in the following Examples 1, 2, and 3
was generated using the ASHRAE Handbook of
Fundamentals, 1990 and the ASHRAE Standard 62-1989,
Ventilation for Acceptable Indoor Quality. These examples
simplify the sizing procedure for most applications. Use this
information as a guide; however, keep in mind that the F90
has different capacities for each fan speed (see
Specifications section).

The number of air changes per hour determines the number
of F90s needed. More air changes per hour than indicated
are unnecessary because the ASHRAE data from which
these examples were constructed is conservative. Fewer air
changes per hour can be compensated for by bringing in
more outdoor air to maintain low contaminant levels or
tolerating a partially cleaned atmosphere. Either may be
acceptable to some users.

Regardless of the method used for calculation, the
architectural features, lighting fixtures, sprinkler system,
ducts, and grilles in the room to be cleaned may influence the
number of F90s required. For ambient air cleaning, establish
a uniform airflow pattern throughout the entire space. When
there is a lack of mounting space, fewer F90s than indicated
may be installed. More F90s may be required for oddly­shaped rooms that do not have even airflow.

If any questions should arise, consult your full-service
distributor Honeywell Commercial Air Products.

To calculate the number of F90s needed using occupant
load, refer to Example 2 (page 6).

To calculate the number of F90s needed using air changes
per hour and room volume, refer to Example 1 (page 5) or
Example 3 (page 6).

4

SMALL PARTICLES REMAINING IN THE
AIR ENTER THE IONIZER SECTION.

IN THE IONIZER SECTION, SMALL 
PARTICLES RECEIVE AN INTENSE
ELECTRICAL CHARGE.

5

THE SMALL CHARGED PARTICLES
ENTER THE COLLECTING SECTION
WHERE THEY ADHERE TO THE
COLLECTOR PLATES OF OPPOSITE
CHARGE.

CARBON FILTERS (IF USED) ABSORB
ODORS AND OTHER GASEOUS
CONTAMINANTS.

6

CLEAN AIR PASSES THROUGH THE
FAN AND IS DISCHARGED IN FOUR
DIRECTIONS INTO THE ROOM,
PARALLEL TO THE CEILING TO
CREATE A COANDA AIR FLOW
PATTERN.

M1527A

Fig. 3. F90 operating sequence.

Choose Location

Mount the F90 on the ceiling near the center of the room. A
45° diagonal mounting prevents stale air build-up in corners
and may allow use of F90s at lower speeds. See Fig. 4. In
larger rooms, divide the area into sections and mount an F90
in the center of each section. In rooms requiring varying
levels of air cleaning, concentrate F90s where air cleaning is
required most. See Fig. 4.

NOTE: To assure even air distribution, the F90 draws air

into the bottom of the air cleaner and discharges air
in four directions as shown in Fig. 5. This Coanda
air flow pattern assures that the clean air is
distributed to all parts of the space. Also, if possible,
mount the F90 to aid the air circulation already
established in the room.

68-0103-6 Revised 11-07

4

F90A,B SELF-CONTAINED COMMERCIAL ELECTRONIC AIR CLEANER

F90

F90

F90

BAR

F90

T

A

B

L

E

S

M1528A

F90

F90

F90

STAGE

LOW SMOKING LEVEL AT 
STAGE AND DANCE FLOOR. 
USE ONE F90.

HEAVY SMOKING LEVEL AT 
TABLES AND BAR.
USE THREE F90s.

F90

DANCE FLOOR

F90

F90

Fig. 4. F90 mounting considerations.

M923

Fig. 5. F90 Coanda air flow pattern.

Outdoor Air

ASHRAE Standard 62-89 specifies that every commercial
space be provided with fifteen cfm per occupant of outdoor
air to replenish oxygen and dilute CO2. If other internal
sources of gaseous contamination are present, additional
outside air is needed to dilute the contamination.

EXAMPLE: An office requires 20 cfm per person because

the standard estimates some smoking, some
copy machine operation, etc. The standard
assumes outdoor air will be cleaned to less
than 75 micrograms per cubic meter prior to
introduction into the space. ASHRAE Standard
62-89 states that supplemental air cleaning to
control smoke or additional outside air must
be provided as required.

Example 1. Sizing by Air Changes per Hour and Room V olume

An office measures 40 x 45 feet (12 x 14 meters) with a 15 foot (4.5 meter) ceiling. How many F90As should be installed?

Solution:

1. Find the room volume: 40 x 45 x 15 feet = 27,000 cubic feet, (12 x 14 x 4.5 meters = 756 cubic meters).

2. Assuming seven air changes per hour, with 27,000 cubic feet (756 cubic meters) volume, the graph below indicates three

F90As are required.

3. Clean outdoor air is also required to replenish oxygen and dilute gaseous contaminants. 20 cfm per person is required for
offices.

AIR 

CHANGES 

PER HOUR

25

20

BARS

15

10

5

0

10,000

[283]

20,000

[567]

ROOM VOLUME IN CUBIC FEET AND [CUBIC METERS]

30,000

[850]

40,000

[1133]

50,000

[1416]

60,000

[1700]

70,000

[1983]

10

9
8
7
6
5
4
3

F90As REQUIRED

2
1

M1524

BOWLING
CENTERS

PLACES OF
ASSEMBLY

CAFETERIAS

LUNCHEONETTES

RESTAURANTS

STORES

OFFICES

5

68-0103-6 Revised 11-07

F90A,B SELF-CONTAINED COMMERCIAL ELECTRONIC AIR CLEANER

Example 2. Sizing by Occupant Load

A cocktail lounge averages 85 occupants. How many F90As should be installed?

Solution:

F90As Required = ASHRAE Recommended Air Circulation/Minute

1. ASHRAE recommended minimum air circulation is 30 cubic feet per minute (cfm) (0.85 m
people, the recommended air circulation would be: 85 people x 30 cfm (0.85 m
minute).

2. F90A capacity (HI setting) is 1250 cfm (35 m

F90A Capacity

3

/minute).

3

3

/minute) per person = 2550 cfm (72 m

/minute) per person. For 85

3

Number of F90A's Required =

3. Clean outdoor air is also required to replenish oxygen and dilute gaseous contaminants. 30 cfm per person is required for
bars and cocktail lounges.

A shop proprietor wants to use F90As to remove high levels of smoke from the air. The shop is 25 x 40 feet (8 x 12 meters) with
a 15 feet (4.5 meters) ceiling. How many F90As are required?

Guideline: In the absence of other information, select the correct number of F90A units to provide between 10 and 20 air

Solution:

F90As required =

1. Calculate the volume of the room: 25 x 40 x 15 feet = 15,000 cubic feet, (8 x 12 x 4.5 meters = 432 cubic meters).

2. Determine the volume of air to be circulated each hour. Ten air changes per hour are used here on the assumption that

the intent is to reduce, but not completely eliminate, smoke. 15,000 cubic feet x 10 air changes/hour = 150,000 cubic
feet/hour (432 cubic meters x 10 air changes/hour = 4320 cubic meters/hour)

3. Determine the volume of air to be circulated each minute:
150,000 cubic feet/hour = 2500 cubic feet/minute (cfm) 4320 cubic feet/hour = 72 cubic meters/minute (m3/minute)

60 minutes/hour 60 minutes/hour

4. F90A capacity (HI setting is 1250 cfm (35 m
Number of F90As Required = 2500 cfm = 2 F90As 72 m3/minute = 2 F90As

changes per hour, depending on contaminant level. The F90As should be located directly above or as close as
possible to the source of contamination.

Desired Air Circulation/Minute

F90A Capacity

2550 cfm = 2 F90A's 72 m3/minute = 2 F90As

1250 cfm 35 m3/minute

EXAMPLE 3. Sizing by Air Changes per Hour and Room Volume

3

/minute).

1250 cfm 35 m3/minute

INST ALLATION

When Installing this Product…

1. Read these instructions carefully. Failure to follow them

could damage the product or cause a hazardous
condition.

2. Check the ratings given in the instructions and on the
product to assure the product is suitable for your
application.

3. Assure the installer is a trained, experienced service
technician.

4. After installation is complete, check out product
operation as provided in these instructions.

68-0103-6 Revised 11-07

WARNING

Explosion Hazard.
Can cause property damage, severe injury, or
death.

1. Do not install or use the F90 where there is any

danger of gas, vapor, or dust explosion.

2. Do not install or use the F90 if explosion-proof
fixtures are specified.

Sharp Edges.
Can cause personal injury.
Wear protective gloves while handling the cells and
prefilter to avoid cuts from the sharp metal edges,
collection plates, and ionizer wires.

WARNING

Must be installed by only a Honeywell trained
installer.

6

F90A,B SELF-CONTAINED COMMERCIAL ELECTRONIC AIR CLEANER

CAUTION

Do not connect the power supply until F90 is
mounted. If the F90 is powered before an electrical
check, be extremely careful to avoid electrical shock.
Also, take care when working near the F90 moving
parts.

Unpacking

1. All F90 components are packed in one box. Slide the

F90 out of the box and remove all packaging material.

• Carefully check all F90 components when
unpacking.

• Check all packaging materials before discarding to
assure no parts or papers are lost.

• Use the mounting template marked on the outside
of the box for easy installation.

2. Pull the two latches located on the front of the F90
cover. Swing the cover down and lift to disengage from
the hinges.

3. Remove the prefilter and cell from the channel guides.

4. If installing the optional WASH LED, remove the power

supply switch plate. To install the WASH LED,
see Fig. 6.

5. Remove the power box from the unit. See Electrical
Troubleshooting section for instructions.

Mounting

WARNING

Heavy Equipment.
Can cause personal injury or equipment damage.

1. If the ceiling is not reinforced properly, the weight
of the F90 could cause structural weakening and
buckling. The unit can fall, presenting a danger
to persons and equipment.

2. When using the keyhole slots for mounting,
assure the washer diameter is larger than the
keyhole diameter (3/4 in. [19 mm]) or assure the
mounting screws are secured in the small
keyhole slot.

IMPORTANT

1. When mounting near walls, allow at least 16 in. (406

mm) for cell installation and removal and 15 in. (381
mm) for cover installation and removal. See Fig. 7.

2. Select a structurally strong part of the ceiling or wall
for mounting. Do not mount the F90 to a suspended
ceiling, to plaster, or to wallboard. If necessary,
construct strong framing to support the weight of
the F90.

The F90 can be mounted in any of four ways:

• Mounted into a ceiling joist using lag screws. See Fig. 8.

• Mounted into a suspended ceiling using threaded steel
rods. See Fig. 9.

• Mounted into a ceiling joist or suspended ceiling using a
transition plate accessory. See Figs. 10 and 11.

• Mounted into a wall using the wall mounting hardware
accessory. See Fig. 12.

The F90 may also be mounted with lag bolts or threaded
steel rods reaching down to the venturi plate. However,
ensure the bolts or rods are short enough to avoid interfering
with the cells. Assure 1-1/2 threads are visible beyond the
nut.

For F90 installation dimensions, see Fig. 7.

Mounting the F90 Using Lag Screws

1. Locate the ceiling joists. See Fig. 8.

2. Drill four 5/16 in. (8 mm) pilot holes in the joists using

the mounting template to locate holes.

3. Lift the F90 to the mounting location.

4. Mount the F90 using four 3/8 in. x 3 in. (10 mm x

76 mm) lag screws and washers.

NOTE: Assure the washer size is larger than the 3/4 in.

(19 mm) diameter of the keyhole or assure the

mounting screws are secured in the small keyhole
slot.

7

68-0103-6 Revised 11-07

F90A,B SELF-CONTAINED COMMERCIAL ELECTRONIC AIR CLEANER

1. LOCATE WASH LED CUTOUT BEHIND 
SWITCH COVER ASSEMBLY STICKER.

3. PUSH LED LENS INTO PLACE. 4.

2. USE A KNIFE TO CUT A HOLE IN 
THE STICKER.

INSERT LED INTO LENS FROM BACK 
OF THE SWITCH COVER ASSEMBLY.

5. ATTACH NEW STICKER TO SWITCH 
COVER ASSEMBLY.

68-0103-6 Revised 11-07

6. REINSTALL SWITCH COVER ASSEMBLY 
SCREWS.

Fig. 6. Installing the W ASH LED.

8

M6832