Honeywell F57A Original Manual page 4
Flush-mount commercial electronic air cleaner
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Also See for F57A:
- Specification data (2 pages) ,
- Owner's manual (26 pages) ,
- Manual (22 pages)
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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.
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.
68-0083—07
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.
4
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