Honeywell F57A Operation instructions

PRODUCT DATA
68-0083-07
Original Manual
F57A,B Flush-Mount Commercial
Electronic Air Cleaner
GENERAL
The F57A,B Flush-Mount Commercial Electronic Air
Cleaners are ceiling-mounted. The F57 removes airborne
contaminants such as tobacco smoke and dust from the
air circulated through the F57.
FEATURES
• Removes staining dirt from the air as measured by
the Dust Spot Method using atmospheric dust; refer
to the American Society of Heating, Refrigerating,
and Air Conditioning Engineers Standard 52.1-92.
• Three-speed motor-driven fan circulates up to
1030 cfm (1750 m3/hr) on F57A, up to 485 cfm
(714 m3/hr) on F57B.
• Solid state power supply is self-regulating and
maintains peak efficiency during a wide range of cell
dirt loading conditions.
• Interlock switch prevents operation when the grille is
open.
• Heavy duty commercial cells and prefilter are
removable for cleaning.
• Air vent provides dilution control of gaseous
contaminants.
• Provides Coanda air distribution by drawing in dirty
air, cleaning it electronically, and recirculating the
clean air in six directions throughout the space.
• Light emitting diodes (LEDs) indicate ON and
CHECK; the WASH LED is optional.
• Test button shows the presence of high voltage.
• Available in 120 Va.c., 60 Hz or 220–240 Va.c., 50 Hz
models.
• Optional wall mounted remote switch.
• Optional hand-held infrared remote transmitter
controls up to nine F57s via infrared remote
receivers. Some models available with infrared
receiver factory installed.
• Optional activated carbon filters controls ozone and
reduces occasional gaseous contamination.
Contents
General ............................................................................................ 1
Features .......................................................................................... 1
Specifications ............................................................................... 2
Ordering Information ................................................................ 2
Planning the Installation ......................................................... 4
Installation .................................................................................... 7
Checkout ........................................................................................ 10
Service ............................................................................................. 11
Electrical Troubleshooting ...................................................... 15
Parts List ........................................................................................ 19

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
68-0083—07 2
SPECIFICATIONS
IMPORTANT
The specifications given in this publication do not
include normal manufacturing tolerances. There-
fore, this unit may not exactly match the listed
specifications. This product is tested and calibrated
under closely controlled conditions, and some
minor differences in performance can be expected
if those conditions are changed.
Models:
F57A Flush-Mount Commercial Electronic Air Cleaner:
contains two FC37B heavy duty commercial cells, power
supply assembly, prefilter, inlet-outlet grille, power and
speed control switch, performance selection switch, col-
lector test button, 3-speed motor driven fan, interlock
switch for the access grille, vinyl trim flanges, exhaust
air vent and LED indication of system operation.
F57B Flush-Mount Commercial Electronic Air Cleaner:
same as F57A, except with only one FC37B heavy duty
commercial cell.
Color: Off-white.
Electrical Ratings: Voltage and Frequency: 120 Va.c.,
60 Hz; 220–240 Va.c., 50 Hz.
Current and Power Consumption:
Air Flow Capacity:
Efficiency:
Up to 95% efficiency using the Dust Spot Method measur-
ing atmospheric dust, according to the American Soci-
ety of Heating, Refrigeration, and Air Conditioning
Engineers (ASHRAE) Standard 52.1-92.
Motor:
F57A: 1/12 hp; sealed ball bearing.
F57B: 1/10 hp; sealed ball bearing.
Motor lubrication is not required.
Ambient Temperature Rating:
Shipping and Storage: minus 20°F to plus 150° F
(minus 29° C to plus 66° C).
Operating: this equipment is intended for use at ambient
temperatures which are usually not higher than 77° F
(25° C) but occasionally may be as high as 104° F
(40° C) for brief periods.
Dimensions:
See Fig. 1 and 2 for dimensions.
Shipping and Installation Weight:
Approvals:
Underwriters Laboratories Inc. Listed: File no. E30954,
Guide no. AGGZ.
Replacement Parts and Accessories:
See “Parts List” on page 19.
Product
Code
Voltage/
Frequency
Rated Air
Volume
Remote
Control
F57A1093 120V/60 Hz 875 CFM
(1500 m3/hr)
F57A1101 220-240V/
50 Hz
F57A1101RC •
F57B1067 120V/60 Hz 460 CFM
(780 m3/hr)
F57B1075 220-240V/
50 Hz
F57B1075RC •
Fan
Setting
120 Va.c., 60 Hz 220–240 Va.c., 50 Hz
AW A W
F57A HI 3.9 315 1.8 315
MED 3.2 300 1.4 250
LOW 2.4 200 1.2 205
F57B HI 4.3 255 1.9 275
MED 2.1 185 1.0 150
LOW 1.2 85 0.7 100
Fan
Setting
120 Va.c., 60 Hz 220–240 Va.c., 50 Hz
cfm m3/min cfm m3/min
F57A HI 1030 29 875 25
MED 690 20 730 21
LOW 555 16 640 18
F57B HI 485 14 460 13
MED 280 8 375 11
LOW 175 5 260 7
F57A F57B
l b kg l b kg
Heavy duty commercial
cell (each)
9.5 4.3 9.5 4.3
Shipping weight 106.0 48.1 64.0 29.0
Installed weight 83.0 37.6 54.0 24.5

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
368-0083—07
Fig. 1. Approximate dimensions of F57A in in. (mm).
Fig. 2. Approximate dimensions of F57B in in. (mm).
5 (127) DIAMETER KNOCKOUT
46 (1168)
22
(559)
(343)
(569)
2
(51)
M5672C
FRONT VIEW
END VIEW
SIDE VIEW
TWO KNOCKOUTS FOR WIRING F57A.1
1
13-1/2
(343)
13-1/2
22-7/16
8-1/4
(210)
8-7/16
(213)
8-1/4
(210)
8-1/4
(210)
5-3/4
(146)
7/8 (22)
DIAMETER
1-1/8 (29)
DIAMETER
6-1/4
(159)
5 (127) DIAMETER KNOCKOUT
SIDE VIEW
1(25)
M5678D
FRONT VIEW END VIEW
3/4 (19)
1 (25)
6-1/2
(165)
6-1/2
(165)
9-1/2
(242)
9-1/2
(242)
13-1/2
(343)
8-1/4
(210)
22-1/2(572)
22
(559)
22
(559)
13-1/2
(343)
1
1GRILLE DIMENSION.
1

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
68-0083—07 4
PLANNING THE
INSTALLATION
WARNING
Explosion Hazard Possible
Can cause personal injury or equipment damage.
Do not install or use the F57 where there is any
danger of gas, vapor, or dust explosion.
Do not install when explosion-proof electrical
fixtures are specified.
Do not install on the floor or directly to the ground.
Application and Operation
The F57 Flush-Mount Electronic Air Cleaner is designed
for use in restaurants, conference rooms, lounges, and
offices where overhead air cleaning is required.
Because the F57 provides its own air circulation, it can be
used in any situation that requires the removal of
contamination from an enclosed area.
Because it is not explosion-proof, the F57 must not be used
if there are dangerous levels of potentially explosive
vapors, gases, or dusts present in the cleaning area.
When the electronic air cleaner is powered, the fan draws
the contaminated air into the electronic air cleaner.
Particles that are too small to be caught in the prefilter are
given an intense electrical charge in the ionizer section of
the electronic cell. As the air passes through the collecting
section of the cell, the charged particles adhere to the
collector plates, which have a strong opposite charge. The
cleaned air passes through the fan component and re-
enters the building space.
Two light-emitting diodes LED(s), ON and CHECK, are
included with the F57. The ON LED lights when the
solidstate power supply is powered and operating normally.
The CHECK LED lights if the F57 requires service attention
or if the test button is pressed. A WASH LED is also
supplied with the F57 but it is not factory installed. It can
be field installed using 4074 EMH Bag Assembly which is
supplied with the F57. See Fig. 4. The WASH LED lights to
indicate cell washing is overdue.
Determine Number of F57s Needed
The sizing procedure determines the number of F57As or
Bs needed. 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.
This sizing information (Fig. 3) was generated using the
ASHRAE Handbook of Fundamentals, 1985; the ASHRAE
Standard 62-1989, Ventilation for Acceptable Indoor Air
Quality. It simplifies the sizing procedure for most
applications. Use this information as a guide; however,
remember that the F57 has different capacities for each
fan speed; see “Specifications” on page 2.
The number of air changes per hour determines the
amount of air cleaning obtained. More air changes per
hour than recommended in the graph above are
unnecessary because the ASHRAE data used in the
calculation is conservative. Fewer air changes per hour
than recommended in the graph can be compensated for
by bringing in more outdoor air to maintain low
contaminant levels, or tolerating a partially cleaned
atmosphere, which may be acceptable to some users.

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
568-0083—07
Fig. 3. F57 sizing by air changes per hour and room area. In most cases, one F57B is equivalent to half an F57A because
the F57B airflow, although less than 50 percent of F57A airflow, is more effectively applied via several locations.
EXAMPLE 1:
Sizing by air changes per hour and room area (using the
graph in Fig. 3).
An office measures 40 x 45 ft (12 x 14m). How
many F57 air cleaners should be installed?
SOLUTION:
1. Find the floor area.
40 ft x 45 ft = 1800 ft2(12m x 14m = 168m2).
2. Assuming ten air changes per hour, with an 1800 ft2
(168m2) area, the graph (Fig. 3) indicates a require-
ment for two F57A units, or four F57B units.
EXAMPLE 2:
Sizing by occupant load.
A cocktail lounge averages 75 occupants. How
many F57 air cleaners should be installed?
SOLUTION:
Number of F57s required =
ASHRAE Recommended Air Circulation/Min
F57 Capacity
1. ASHRAE recommended minimum air circulation is
35 cfm (1m3/min) per person. For 75 people, the rec-
ommended air circulation would be:
75 people x 35 cfm (1m3/min) per person = 2625 cfm
(75m3/min).
2. F57A capacity (HI setting) is 1030 ft3/min
(29m3/min).
Number of F57As required =
2625 ft3/min/1030 ft3/min = 2.5 or 3 units.
or
F57B capacity (HI setting) is 485 cfm (14m3/min).
Number of F57Bs required =
2625 ft3/min/485 ft3/min = 5 units.
EXAMPLE 3:
Sizing by air changes per hour and room volume.
A shop proprietor wants to use electronic air clean-
ing to remove high levels of smoke from the air. The
shop is 25 x 40 ft (8 x 12m) with a 15 ft (4.5m) ceil-
ing. How many F57 air cleaners will be required?
GUIDELINE: In the absence of other information, select the
correct number of F57 units to provide between 10 or 20
air changes per hour, depending on contaminant level. The
air cleaner should be located directly above or as close as
possible to the source of contamination.
SOLUTION:
Number of F57s required =
Desired Air Circulation/Min
F57 Capacity
1. Calculate the volume of the room.
25 ft x 40 ft x 15 ft = 15,000 ft3
(8m x 12m x 4.5m = 432m3).
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 com-
pletely eliminate, smoke.
15,000 ft3x 10 air changes per hour = 150,000 ft3/hr
(432m3x 10 air changes per hour = 4320m3/hr).
Then determine the volume of air to be circulated
each minute.
150,000 ft3/hr
60 min/hr = 2500 ft3/min
4320 m3/hr
60 min/hr = 72m3/min
3. F57A capacity (HI setting) is 1030 ft3/min
(29m3/min).
Number of F57As required =
10
9
8
7
6
5
4
3
2
1
20
18
16
14
12
10
8
6
4
2
EXAMPLE 1
537
(50)
1075
(100)
1610
(150)
2150
(200)
2690
(250)
3230
(300)
3760
(350)
4300
(400)
AREA IN SQUARE FEET (SQUARE METERS)
TO USE THE GRAPH:
EXTEND A HORIZONTAL LINE FROM THE DESIRED NUMBER OF AIR CHANGES PER HOUR, UNTIL IT INTERSECTS
WITH A VERTICAL LINE DRAWN UPWARD FROM THE NUMBER OF SQUARE FEET OF THE ROOM.
READ THE NUMBER OF UNITS REQUIRED AT THE INTERSECTION POINT.
1.
2.
25
20
15
10
5
0
BOWLING
CENTERS
PLACES OF
ASSEMBLY
STORES
OFFICES
RESTAURANTS
BARS
CAFETERIAS
LUNCHEONETTES
AIR
CHANGES
PER HOUR
F57A UNITS REQUIRED F57B UNITS REQUIRED
M1206B

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
68-0083—07 6
2500 ft3/min 72m3/min
1030 ft3/min 29m3/min = 2.4 or 3 units.
or
F57B capacity (HI setting) is 485 cfm (14m3/min).
Number of F57Bs required =
2500 ft3/min 72m3/min
485 ft3/min 14m3/min = 5 units.
Regardless of the method used for calculation, the physical
limitations of the space to be cleaned can influence the
number of electronic air cleaners required. For ambient air
cleaning, it is essential to establish a uniform airflow
pattern throughout the entire space. Fewer electronic air
cleaners can be installed because of a lack of mounting
space. More units may be required due to an oddly-shaped
room that does not lend itself to an even airflow.
If any questions should arise concerning size, consult your
distributor or local Honeywell Home and Building Control
Sales Representative.
Choose Location
The F57 is mounted horizontally, and can be used in
almost any air cleaning application that has a suspended
ceiling. For the most efficient operation, place the F57 as
close as possible to the contaminant source.
When placing the F57, be sure that the clean air discharge
enhances the airflow patterns of the area to be cleaned. For
example, do not place the air cleaner so its discharge
disrupts the flow from the central air handling system
supply registers.
The shape of the room, location of central air conditioning
diffusers and returns, architectural features, and ceiling
obstruction will affect optimum F57 location in the ceiling.
For partial dilution of odor and gaseous contaminant,
some F57 discharge air can be bled off into the area above
the suspended ceiling, or a run of 12 ft (3.7m) or less of 5
in. (127 mm) round duct can be vented outdoors or to an
exhaust duct that is always at negative pressure.
Determine if the air vent of the unit must be ducted to the
return air plenum (as some local building codes require).
For duct connection, make sure the access panel to the
vent is removed so a 5 in. (127 mm) diameter duct can be
connected to the collar (collar is field supplied).
Fig. 4. Installing Optional Wash LED.

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
768-0083—07
INSTALLATION
When Installing this Product...
1. Read these instructions carefully. Failure to follow
them could damage the product or cause a hazard-
ous condition.
2. Check the ratings given in the instructions and on the
product to make sure the product is suitable for your
application.
3. If the air cleaner is to be functionally checked before
installation, be extremely careful to avoid electrical
shock. Also, take care when working near the air
cleaner’s moving arts. Ensure power is disconnected
before installation.
4. Installer must be a trained, experienced service tech-
nician.
5. Installation and wiring must conform to current regu-
lations. In Europe, a qualified electrician must super-
vise wiring.
6. In Europe, the air cleaner must be supplied via a dou-
ble pole isolating switch with a contact separation of
at least 3mm in each pole.
7. WARNING: This air cleaner must be earthed
(grounded).
8. This air cleaner is designated for use in commercial
premises; it is not intended for use in domestic appli-
cations.
9. Ensure minimum fresh air supply is maintained
based on the type of premises and occupancy. Refer
to local standards and codes of practice.
10. After installation is complete, check out air cleaner
operation as provided in these instructions.
WARNING
Explosion Hazard Possible
Can cause personal injury or equipment damage.
Do not install or use the F57A,B where there is any
danger of gas, vapor, or dust explosion.
This unit has not been investigated for use in the
ceilings of fire-resistant assemblies.
CAUTION
• Do not connect the power source until after
electronic air cleaner is mounted. This will
prevent electrical shock or equipment damage.
• Be sure to turn off the air cleaner before servicing
it. The air cleaner motor is equipped with an
automatic thermal overload. If the motor
becomes overheated, it will automatically stop. It
will automatically start after a sufficient period of
cooling (several minutes to an hour).
• If the air cleaner must be turned on for an
electrical check, be extremely careful to avoid
electrical shock. Also, take care when working
near the air cleaner moving parts.
• When installing the air cleaner in the ceiling, wear
gloves for hand protection.
Unpack F57 Commercial Electronic
Air Cleaner
WARNING
Sharp Edges
Can cause personal injury.
Handle air cleaner carefully to avoid cuts from
sharp metal edges. Wear protective gloves.
Remove the grille assembly.
Remove the prefilter and electronic cells from the
electronic air cleaner; set aside.
Remove the electronic air cleaner from the box; remove
the four screws on the back of the cleaner, and discard.
This releases the fan motor into a floating suspension
that minimizes noise.
Remove all shipping cardboard and cell containers
inside and outside of the air cleaner components.
Inspect packing material before discarding to be sure no
parts or papers are lost.
If installing optional WASH LED, remove power supply
cover. Refer to Fig. 4 and the corresponding steps below:
A. Remove black two-hole label from switch bracket.
B. Snap the LED holder into the center hole,
mounting from the front side of the switch
bracket.
C./D.Snap the LED into the back of the LED holder.
E. Apply plain three-hole label included onto the
switch bracket.
F. Replace power supply cover and apply printed
label (included) to power supply cover.
Optional Exhaust Air Vent
Remove the five-inch knockout on the side of the F57 when
using the exhaust air vent option. Purchase a five-inch
collar locally and insert into the opening. Bend tabs to
secure the collar.
Mount F57 Commercial Electronic
Air Cleaner
WARNING
Heavy Equipment
Can cause personal injury or equipment damage.
When the F57A,B is not reinforced as explained
below, structural weakening, buckling, or the unit
falling may cause personal injury and equipment
damage.
Mount the F57A,B as part of a suspended ceiling, with a
minimum of 14 in. (356 mm) between the suspended
ceiling and the true ceiling. See Fig. 5 and 6. Forty feet
(12.2m) of 12 gauge wire is included for adding support to
the dropped ceiling T-bars. Also included are four support
shoulders, four rubber mounting spacers, and four
panhead bolts with self-locking nuts.
Remove the tile(s) from the suspended ceiling for a
space approximately 24 x 48 in. (610 x 1220 mm) for
F57A, or 24 x 24 in. (610 x 610 mm) for F57B. The area
between the suspended ceiling and the true ceiling

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
68-0083—07 8
must be at least 14 in. (356 mm) and clear of ducts,
pipes, and other obstacles and encumbrances.
Fig. 5. Typical F57A mounting procedures.
SUSPENDED
CEILING
F57A
BE SURE TO TWIST THE SUPPORT WIRE A MIINIMUM OF FOUR TIMES TO PROPERLY BEAR WEIGHT.
THERE MUST BE 14 IN. (356 MM) BETWEEN SUSPENDED CEILING AND TRUE CEILING.
SUPPORT SHOULDER
POSITIONS
REINFORCED
T-BAR
VINYL FLANGE
MOUNTING
SPACER (1 OF 4)
SUPPORT
SHOULDER
(1 OF 4)
BEND TABS TO
HOLD MOUNT
ON AIR CLEANER
PLACE WIRE SUPPORTS AS CLOSE AS POSSIBLE
TO F57A SUPPORT SHOULDER POSITIONS,
APPROXIMATELY 5 IN. (127 MM) FROM ENDS.
T-BAR/DROP CEILING SUPPORT SYSTEM
24 IN.
(610 MM)
24 IN.
(610 MM)
M5674
SUSPENDED
CEILING
TRUE CEILING
11
1
1
2
1
2
24 IN.
(610 MM)
IF NEEDED, REMOVE
T-BAR TO CREATE
48 X 24 IN.
(1219 X 610 MM) SPACE.

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
968-0083—07
Fig. 6. Typical F57B mounting procedures.
Reinforce the suspended ceiling T-bars with the wire,
placing the wires to evenly distribute the F57 weight.
Securely attach wires to both the suspended ceiling and
the true ceiling, and to the T-bars. Twist the wire at least
four times.
Place F57 into cleared area with grille side facing the
floor. Lift F57 into space until grille side is above
suspended ceiling level. Reach in and attach the rubber
mounting spacers to the T-bars at the mounting
shoulder locations.
Attach four support shoulders to the F57. Bend the tabs
on the mounting shoulders to secure them to the F57.
Attach vinyl flanges to the bottom of the F57 frame to
cover any space that appears between the F57 and the
suspended ceiling.
Settle the F57 on the mounting spacers on the
reinforced T-bars.
Locate the holes just above the four vinyl flanges. Drill
1/4-in. (6.4 mm) holes through the T-bars at these
locations. Slip a panhead bolt through each hole, and
fasten with a self-locking nut.
SUSPENDED
CEILING
F57B
BE SURE TO TWIST THE SUPPORT WIRE A MIINIMUM OF FOUR TIMES TO PROPERLY BEAR WEIGHT.
THERE MUST BE 14 IN. (356 MM) BETWEEN SUSPENDED CEILING AND TRUE CEILING.
SUPPORT
SHOULDER
POSITIONS
REINFORCED
T-BAR
VINYL FLANGE
MOUNTING
SPACER (1 OF 4)
SUPPORT
SHOULDER
(1 OF 4)
BEND TABS TO
HOLD MOUNT
ON AIR CLEANER
PLACE WIRE SUPPORTS AS CLOSE AS POSSIBLE
TO F57B SUPPORT SHOULDER POSITIONS,
APPROXIMATELY 1 IN. (25 MM) FROM ENDS.
T-BAR/DROP CEILING SUPPORT SYSTEM
24 IN.
(610 MM)
24 IN.
(610 MM)
M5675
SUSPENDED
CEILING
TRUE CEILING
11
1
1
2
1
2
IF NEEDED, REMOVE T-BAR
TO CREATE 24 X 24 IN.
(610 X 610 MM) SPACE.
F57B

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER
68-0083—07 10
Air Vent
The air vent helps to control gaseous contaminants such
as by-products of cigarette smoking by allowing some of
the air circulated through the F57 to be discharged into the
return plenum.
To use the air vent, remove the five inch knockout in the
side of the F57 cabinet. See Fig. 7. When venting into the
false ceiling cavity, leave the vent fully open. When ducting
into the return plenum, install damper and position it to
reduce the opening by 50 percent.
Fig. 7. Air vent adjustment.
Wiring
IMPORTANT
Before wiring the F57, remove the power supply
cover. After completing the wiring procedures, reat-
tach the power supply cover.
All wiring must comply with applicable codes and
ordinances.
Power supply wiring system shall provide disconnect
switch for all poles.
The power source to the F57A,B must agree with the model
type, either 120 Va.c., 60 Hz or 220.240 Va.c., 50 Hz.
To wire 120 Va.c., 60 Hz model:
Run three No. 14 color-coded wires through the conduit
to the wiring compartment of the F57. Attach the green
wire to the external ground. The black and white wires
are the power carriers.
Attach the conduit to the knockout desired (either the
large or small knockout).
Attach the green ground wire to the ground screw.
Ground the F57 for proper operation and safety.
Attach the black and white wires to the black and white
wires from the F57 using the wire nuts. See Fig. 8.
To wire 220.240 Va.c., 50 Hz model, see Fig. 8.
IMPORTANT
Earth (ground) the F57 for proper operation and
safety.
This appliance incorporates an earth connection for
functional purposes only.
Fig. 8. Typical F57 wiring hookups.
Reassemble the F57
Reinstall the electronic cells, prefilter, charcoal filter (if
used) and grille assembly. For proper installation of the
cells, see “Service” on page 11.
CHECKOUT
Inspect the Installation
Refer to Fig. 9 and 10 for location of components.
Be sure that the screws on the back of the F57 are
removed to allow for the motor floating suspension.
Observe that the F57 is oriented for good air circulation.
Check that the F57 is correctly and securely attached.
Be sure that the F57 weight does not overstress the
suspended ceiling.
Make sure that the access door is easily opened, and
that the prefilter, cells, and activated carbon filters (if
used) are secure within the unit.
Check leveling of the F57. If necessary, further reinforce
and relevel suspended ceiling T-bar grid and adjust the
hanging wires. If unit is not level, motor can be noisy or
can eventually malfunction.
Check that the electronic cells are correctly oriented for
correct airflow. The cells are correctly oriented when the
contact board of the cell is properly seated. The ionizer
section faces the access door and the collector section
faces the fan.
Be sure the prefilter is correctly placed. The airflow
arrow on the prefilter should be pointing toward the
cells.
Check that the wiring compartment cover is correctly
reinstalled and the grille assembly is latched closed.
Clean the inside and outside of the F57.
KNOCKOUT KNOCKOUT
FIELD SUPPLIED
DAMPER
M7640
120V A.C., 60 HZ MODEL
BLACK FROM F57
WHITE FROM F57
BLACK
WHITE
120V A.C.
F57 GROUND SCREW
220-240V A.C., 50 HZ MODEL
F57A / F57B
N
N
L
L
220-240V A.C.
M5669B