5
revised 10/09
Smog-Hog
PSH Series Model
1.4 description of Components
1.4.1 POWER PACKS
each power pack converts 115 volt, single-phase
ac power to high voltage Dc for two ionizers and
two collector cells. this combination of components
comprises a working “module”. Standard packs supply
positive Dc voltage of 11.0 (nominal) kVDc to two
ionizers and 5.5 kVDc to two collection cells. Power
packs with special ratings are supplied on certain
applications. Power packs are mounted in power pack
enclosures located on the module doors to the PSH.
each pack has an externally mounted indicator light
that illuminates to indicate normal operation. the PSH
power pack meets uL safety standards. in the event
of a short circuit or overload condition to the output
side, the power pack’s high voltage collapses and the
indicator light is in the flashing mode. upon removal
of the overload, the power pack automatically returns
to normal and the indicator light will be illuminated.
the power pack is self-protecting against overloads
(e.g. dirty components, short circuits in ionizer and
cell circuits) and is self regulating from ac voltage
variations 90 to 130 Vac.
1.4.2 IONIzER SECTION
each ionizer supports nine (9) 10 mil tungsten steel
ionizer wires spring mounted and centered between
aluminum ground plates. refer to figure 5. When
high Dc voltage is applied to the wires, a powerful
field charges contaminated particles. ionizer standoff
convoluted insulators are part of the ionizer wire
support bar(s) which separates high voltage from the
grounded chassis.
1.4.3 COLLECTOR CELL SECTION
each collector cell contains a series of parallel plates,
alternately charged and grounded, whose planes
are in-line with the direction of airflow. refer to
figure 5. charged plates are connected electrically
and suspended from four triangular shaped insulators
on each end of the unicell. the ground plates are
independently supported.
1.4.4 FILTERS
Prefilters and afterfilters can take many forms but are
normally of the mechanical type, aluminum metal mesh
and encased in an aluminum frame. filters provide
even air distribution and collect large particles.
1.4.5 JUNCTION BOxES
PSH mounted junction boxes are equipped with
terminal strips for 115 Vac single phase power entry.
on factory-assembled systems, three phase field
connection is usually to a single point to a uaS Main
electrical Panel or a uaS Blower Panel. refer to uaS
System Layout Drawings and uaS electrical Drawings
which define the required field installation for each
application.
1.4.6 OTHER EQUIPMENT
the PSH may be supplied with, in-place cleaning, inlet
plenum with baffle filters or aluminum filters, outlet
plenums, skid mounted, insulated enclosure, cooling/
heating coils, and blower. System components may be
shipped skid mounted, or as subassemblies. Planning
is required to understand the scope of the installation,
from handling to assembly to the connection of utilities.
2. INSTALLATION PLANNING
Prior to receipt of equipment, drawings should be
reviewed and plans completed for handling and
installation. Site selection, support structure, utilities,
drains, ductwork and work sequence need to be
coordinated.
UAS Electrical Panels provide the necessary
electrical interlocks and controls for the PSH.
If electrical control panels supplied by others are
not per UAS specifications the PSH is operating
in an UNSAFE mode, voiding the warranty.
The following are general guidelines.
2.1 Location
Systems should be located as near as possible to the
emission source, but with consideration given to utility
proximity and safe maintenance access. indoor location
is preferred since it eliminates climate associated
problems such as servicing the system, heat traced/
insulated wash water and drain pipes or an insulated
system enclosure.
2.2 Clearances
2.2.1 COMPONENT ACCESS
a clearance of 36” is recommended for maintenance
and component removal/installation to the access
door(s) side, refer to uaS System Layout Drawing for
clearances.
2.2.2 ELECTRICAL ENCLOSURE ACCESS
a minimum of 18” is required from overhead
obstructions to allow access to electrical top boxes.
a side clearance of 48” usually is recommended for
access to electrical panels, refer to nec for specified
clearance.
2.2.3 BOTTOM WORKING CLEARANCE
Plumbing access should be at least 18” beneath
the unit.
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CAUTION
