Planning The Installation - Honeywell F57A Manual

F57A,B FLUSH-MOUNT COMMERCIAL ELECTRONIC AIR CLEANER

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.
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.
BARS
CAFETERIAS
LUNCHEONETTES
BOWLING
CENTERS
RESTAURANTS
PLACES OF
ASSEMBLY
STORES
OFFICES
TO USE THE GRAPH:
1. 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.
2. READ THE NUMBER OF UNITS REQUIRED AT THE INTERSECTION POINT.
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.
68-0083-7 Revised 11-07
AIR
CHANGES
PER HOUR
25
20
15
10
5
EXAMPLE 1
0
1075
537
(50) (100)
AREA IN SQUARE FEET (SQUARE METERS)
Two light-emitting diodes LED(s), ON and CHECK, are
included with the F57. The ON LED lights when the solid-
state 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 section.
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.
1610 2150 2690 3230
(300)
(150) (200) (250)
4
10
20
9 18
8 16
7 14
6 12
5
10
4 8
3 6
2 4
1 2
3760 4300
(350)
(400)
M1206B