Справочник Пользователя для Duracell Air Cleaner 75

1

The standard major components supplied with each unit
for installation are as follows:

electronic air cleaner
controller / power supplies

The electronic air cleaner contains the ionizing-
collecting cells (collecting elements) and metal mesh
pre-filters and after-filters. Perforated plate or
impingement type mist suppressors, in lieu of the metal
pre-filters, are options when specified.

Gasketed access doors located on one end of the
cabinet, 90 degrees to the direction of the airflow,
provide entry for removal of the cells and filters. The
location of the access doors may be specified as “right”
or “left” handed. The hand designation is determined by
standing in the ductwork on the air entering side of the
unit so the airflow strikes your back.

The Pulse Width Modulated (PWM) power supplies,
providing the necessary high voltage for the air cleaner
and the controls are furnished in a NEMA 12 enclosure
designed for remote mounting. The distance between
the controller and unit must be determined as the
interconnecting high voltage leads are furnished to the
specified length. Consult factory for distances greater
than 50 ft. Cables are not to be spliced at any point
along their length. In addition, the enclosure is a central
junction for the primary wiring.

2.  System Design and Layout
The arrangement of the supplied components and the
general layout of the system will vary according to
application, adjoining equipment and available space.
However, there are several basic factors pertaining to
all installations that must be considered:

To maintain the selected cleaning efficiency, it is
important to assure that the total air volume (capacity in
CFM) is uniformly distributed across the entire face area
of the unit. The metal mesh filters, perforated plate or
mist suppressors; provide some resistance to effect
even air distribution. However, since most air ducts are
designed to handle air velocities greater than the rated
velocity of the air cleaner, it is necessary to properly
transition any attached ducting. If possible, a contraction
ratio of 1 in 3 (approximately 20

°) should be maintained.

If space prohibits, turning vanes, air baffles or other
means may be utilized. Ducting – where attached to the
cabinet collars – should be gasketed, caulked or
otherwise made watertight.

When there is a danger of rain, snow or debris being
drawn into the system with outside air, the make-up air
intake should be protected with rain louvers, hooding
and hardware cloth to prevent the rain, snow or debris
from entering the electronic air cleaner.

Contaminants to be collected – such as oils in vaporous
state – must be condensed into particulate form prior to
entering the ionizing-collecting cells in order to maintain
the anticipated efficiency. Gases, vapors or any non-
particulate cannot be precipitated and will therefore
pass through the air cleaner. Any condensing that takes
place downstream from the air cleaner defeats the
purpose. By the same token, heavy concentrations of
water vapor, or other matter that becomes highly
conductive when condensed, must be prevented from
entering and/or condensing in the collecting elements to
prevent electrical arc over and shorting.

Drain lines from the cabinet drain basin should be
trapped or otherwise sealed against the system
pressure (in accordance with local codes). Each
installation varies according to needs, but normally the
controller is located near the air cleaner. Ideal mounting
height is at eye level for ease in reading the
instrumentation, and to facilitate service.

For ease in maintenance and component removal,
adequate space, 39” Minimum Required, must be
provided in front of all access doors, motors, pump and
accessory equipment. Special consideration should be
given in this respect for installations where the unit is
suspended overhead. Catwalks or platforms should be
provided.