Technical information

8
5. The percent operating efficiency required of
the electronic air cleaner. The AutoClean
efficiency should be from 85 to 95 percent
depending on the application and purpose.
See Efficiency Chart, Fig. 3.
Contact an Air Quality Engineering Representative
for assistance on commercial sizing.
INDUSTRIAL APPLICATIONS
Sizing is determining how many air cleaning units
are required to maintain a desired level of air
quality. The process to sizing an industrial
application involves roughly figuring the number of
air cleaners needed and then modifying the figures
according to the specific characteristics of each
application.
For ambient air cleaning, the estimated number of
electronic air cleaners may be determined by the
relationship of air volume to the needed air
changes per hour.
An alternative method for calculating the estimated
number of electronic air cleaners can be used if it
is possible to measure the generation rate of the
contaminants and the allowable level of
contamination.
To use either method of calculation, contact an Air
Quality Engineering Representative for assistance
on industrial sizing.
Regardless of the method used to calculate the
number of units needed to produce clean air, the
physical conditions of the space to be cleaned
may either limit this number or demand that more
units be installed. For ambient air cleaning, it is
important to establish a uniform airflow pattern
throughout the entire space. Limitations to the
calculated sizing may be a lack of space for
mounting areas or the number of units may
interrupt normal building operation; that is, a unit
cannot be mounted where an overhead crane will
smash into it or where stand mountings seriously
interrupt building traffic patterns. The number of
units required by air volume and air changes per
hour might need to be increased when the shape
of a structure is such capturing and air distribution
is not possible according to the sizing calculations
that effective.
LOCATION AND POSITION
Because air-handling systems vary greatly in
arrangement and style, factors such as location,
air distribution, transitions, etc., require careful
consideration.
The AutoClean cabinet must be mounted in a
horizontal duct in an upright position with the
washing manifold above the electronic cells.
Locate the cabinet in the return air duct so that the
face of the electronic cell is at right angles to the
airstream.
FIGURE 4 – TYPICAL INSTALLATION
CENTRAL DETERGENT SYSTEM FOR
MULTIPLE AIR CLEANERS
When the installation includes two, three or four
AutoClean air cleaners, they can be positioned so
that the wash detergent can be pumped from a
centrally located bottle. Maximum horizontal
distance from air cleaner cabinet to detergent
bottle is 20 ft., maximum vertical distance is 7 ft.