3
SECTION I DESIGN
FOR THE SYSTEM DESIGN ENGINEER
1. General
Description
Model 60 equipment consists of factory-assembled
components to be “built-up” in the field into a completed
unit. Depending on the system requirements, the
installation may consist of a single unit or a multi-section
unit. A multi-section unit is simply two or more single
units placed side-by-side.
The factory-assembled components are designed to be
mounted on a field prepared pad in the form of a drain
basin, typically constructed of poured concrete.
The standard major components supplied with each unit
for installation are as follows:
A. Framework
– Support members, complete with
sheet metal panels on the top and sides, to receive
and locate the ionizing-collecting cells.
B. Ionizing-Collecting Cells
– The elements used to
remove and collect the contaminants from the air
stream.
C. Control/Power Supply Box(s)
– Located in the
control enclosure and converts 115VAC to the high
voltage DC required to energize the ionizing-
collecting cells.
The programmable logic controller (PLC) electrically
sequences the washing operation. The Pulse Width
Modulated (PWM) power supplies, providing the
necessary high voltage for the air cleaner and the
controls initiating and sequencing the wash cycle
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.
D. Accessories
– Electrical interlocks, lights and
switches for safety and monitoring.
Note: Trion Tridex Detergent is specially formulated
for use with Trion electronic air cleaners. Use of
other cleaners and detergents, not specifically
approved by Trion, will cause possible failures in
the unit and will void any and all warranties on our
equipment.
2. System Design and Floor 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. 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 sheet metal
panels – should be gasketed, caulked or otherwise
made water and airtight.
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.
SAFETY NOTE:
Factory designed access to all electrically charged
high voltage components contain electrical
interlocks for the safety of operating personnel. Any
additional access that may be provided in the
system, where there is access to high voltage, must
be equipped with such interlocks. Interlocks are
readily available from the factory.
A foundation and drain basin design must be provided
to carry off the wash water used to clean the ionizing-
collecting cells. It is suggested that a new concrete
basin be poured prior to the scheduled shipment of the
hardware. Refer to Figure 3, Recommended Foundation
and Drain Basin Layout Drawing.
Serious consideration should be given to any deviation
from the suggested design, which would result in
improper drainage, leakage, air bypass and mounting.
In addition to the governing plumbing codes, the
following points should be considered in the
construction of the basin.
A.) Drain lines must be of adequate size to carry off the
required amount of detergent/wash water used.
Refer to the piping schematic drawing, Figure 4.
B.) Drain lines must be suitably trapped and vented to
prevent line gases from entering the air handling
system.
