Electro-Air SLIM TWIN ST-14-A Installation & Service Manual

Elect II
I[
IONIZING
DIRTY SECTION
AIR.
PRE~FllTERS!
FIG •. 3
Installation & Service Manual ST . . l00·A
SLIM TWIN
ELECTRONIC AIR CLEANER
ST"l ST-20-A
A. APPLICATION
The electronic air cleaner is designed to provide
air cleaning in applications w her e a multi-retu rn
ducted system is employed. The unit is installed in
the return air duct
~n
a location common to all of the
branch ducts.
The unitis
available
in 2 models:
ST-14-A designed for an air volume of up to 1,400
CFM (2380 M'1
ST-20-A designed for an air volume of up to 2,000
CFM (3400
The unit can be installed withhori;::ontpJ.ajrflpw
left-to-right (fig. 6) orright-lo-Ieft (fig. 7), or can be
installed with airflow vertically up (fig. 8) or vertically
down (fig. 9).
B.MAJOR COMPONENTS
1. Power
Pack~(Fig.
1) This component houses the
electronic circuitry necessary
to
develop the high
voltage electrostaticfield.
Collecting Cells (2)-(Fig. 2) These all aluminum
components consist of an ionizing section that
con~
taihs fihe tungsten ionizing wires suspended between
electrodes; and a collecting section that contains a
series of parallel aluminum plates.
3. Pre-filters (2)-(Fig. 2) These filters are designed
to keep lint and large particles out of the collecting
cell.
4. Cabinet-(Fig. 2) Constructed of 18 gauge galva-
nized steel to resist rust and corrosion. Tabs are
proVided to facilitate mounting to a cbllaronthe air
handling equipment.
C.OPERATION
(Fig. 3)
Particles suspended in the air stream are carried
through the return duct to the electronic air cleaner.
They receive a strong positive electrical charge in
the ionizing section of the cells and are then attract-
ed tothe aluminum plates in the collectingsection of
the cells, where they adhere. Periodic washing of the
collecting cells is necessary to wash away the col-
lected dirt particles.