Certified for shock and electrical fire hazard only.
INTRODUCTION
DESCRIPTION
The SC Series Electronic Air Cleaners are self-contained
units comprised of collecting cell(s), electrical
compartment, blower and motor assembly, complete
cabinet housing, prefilter(s) and after filter(s) or optional
carbon filter(s).
There are two sizes available:
Model SC-910: up to 1100 CFM capacity at 90%
efficiency
Model SC-924: up to 2100 CFM capacity at 90%
efficiency
The efficiency of the above units are rated on the removal
of particulate matter down to .01 micron including welding
fumes, automotive grinding dust, oil mist and carbon
black dust. On larger particulate matter such as .03
micron, it is possible for efficiencies to reach as high as
99%. This is based on the ASHRAE standard Dust Spot
Test.
HOW IT WORKS
The Electronic Air Cleaner operates on the principle of
"Electrostatic Precipitation". Millions of airborne pollutants
are drawn in through the intake grill on the front of the air
cleaner and first pass through a prefilter where large
particles are caught. Next, smaller particles move to a
two-stage electrostatic collecting cell where they are
given a powerful positive charge by the ionizing wires.
Charged particles then move into the collecting area
where they are attracted to a series of alternately charged
and grounded plates. Pollutants are held on the plates
like a magnet until washed away during cleaning. Clean
air is then dispersed through the exhaust grill.
MAJOR COMPONENTS
CABINET
The cabinet is constructed of 18 gauge steel finished in a
scratch-resistant, electrostatic powder coated finish. The
unit has an interlocked cell access door, and two blower
access doors. The removeable intake grill is 20 gauge
expanded metal screen. Air is discharged through a 4-
way directional defuser. Weld nuts to accept 1/2 in.
threaded rods are incorporated into the cabinet top to
facilitate hanging the unit.
PREFILTERS
The washable prefilter measuring 16 x 20 in (40.6 x 50.8
cm) is constructed of multi-layers of aluminum mesh for
maximum filtration of large particles.
AFTER FILTER
The after filter measuring 16 x 20 in (40.6 x 50.8 cm) is
constructed of multi-layers of aluminum mesh for filtration
of agglomerated dust, and to maintain back pressure.
COLLECTING CELL
The two part collecting cell include support brackets,
collecting plates, support tubing, insulators, end plates,
spring contact, access handles, and separate ionizing
section; ionizing wires, ionizing wire support.
MOTOR & BLOWER
The motor is 3/4 HP TEFC, 1725 RPM. The blower is a
double inlet, centrifugal type with a forward inclined
wheel.
ELECTRICAL COMPARTMENT
The control panel on the front of the unit contains the two
lighted rocker switches to control the motor and power
board, and a performance indicator light, indicating high
voltage.
The high voltage power board is located in a separate
removable steel box mounted below the blower motor.
The power board is an open printed circuit board with an
adjustable output. The direct current output is 10,000
volts @ 3.5 mA. It is fused at 1.5 amps. A large value
resistor bank will bleed off the high voltage from the cell
when the unit has been turned off.
Quick disconnects on the board allow easy removal for
troubleshooting or repairs.
The Performance Indicator
Light should be on during normal operation.
The light
will flicker with arcing in the cell or extinguish if the cell,
ionizer or power board is shorted.
The cell access door is equipped with a safety interlock
switch to cut the power to the unit when the door is
Electrostatic Precipitation
2 Prefilter
1 Dirty Air
3 Ionizing Section
4 Collecting Cell Plates
6 Clean Air
5 After Filter or
Carbon Filter
(optional)
