UAS SMOG-HOG SG SERIES User manual

OWNER’S MANUAL
SMOG-HOG®ELECTROSTATIC PRECIPITATOR:
SG SERIES
MODEL SG-2

KNOW YOUR EQUIPMENT
READ THIS MANUAL FIRST.
Your Smog-Hog® SG should provide many years of trouble-free service. This manual will
help you understand the operation of your SG unit. It will also help you understand how
to maintain it in order to achieve top performance. For quick future reference, fill in the
system information in the spaces below. Should you need assistance, call the United Air
Specialists, Inc. Customer Service number shown below. To expedite your service, have
the following information available when contacting UAS.
UAS ORDER #: ________________________________________________________________
UNIT MODEL #:________________________________________________________________
UNIT SERIAL #: ________________________________________________________________
HIGH VOLTAGE POWER PART NUMBER: _________________________________________
SYSTEM ACCESSORIES:
______________________________________________________________________________
______________________________________________________________________________
______________________________________________________________________________
INSTALLATION DATE: __________________________________________________________
UNITED AIR SPECIALISTS, INC. CUSTOMER SERVICE
1-800-252-4647

i
TABLE OF CONTENTS
Page
SAFETY PRECAUTIONS ........................................................................................ iv
1. HOW THE SMOG-HOG SG SERIES WORKS.....................................................1
2. INSPECTION OF EQUIPMENT............................................................................1
3. INSTALLATION OF PLANNING ...........................................................................1
3.1 Unducted or Area Capture ........................................................................1
3.2 Ducted or Source Capture ........................................................................1
3.3 Specifications ............................................................................................1
4. INSTALLATION.....................................................................................................4
4.1 Ceiling Mounting .......................................................................................4
4.2 Column or Wall Mounting..........................................................................4
4.3 Bottom Supports .......................................................................................4
4.4 Drains .......................................................................................................4
4.5 Electrical Connections...............................................................................4
4.6 Power Pack ...............................................................................................6
4.7 Air Diffuser ................................................................................................6
5. START UP AND OPERATION..............................................................................6
5.1 Installing Components...............................................................................6
5.2 Blower Rotation.........................................................................................7
5.3 Blower Current Measurement ...................................................................7
5.4 Motor Variable Pitch Pulley Adjustment....................................................7
5.5 Blower Belt Tension Adjustment ...............................................................7
5.6 Power Pack Operation ..............................................................................7
5.7 Power Pack Enclosure Push Rod and Grounding Bar .............................8
5.8 In-Place Cleaning (Optional).....................................................................8
5.9 Placing SG On Line ..................................................................................9
6. MAINTENANCE AND MANUAL CLEANING........................................................9
6.1 Normal Maintenance .................................................................................9
6.1.1 Check Power Pack Enclosure Indicator Lights................................9
6.1.2 Check Component Appearance Weekly..........................................9
6.1.3 Perform In Place Cleaning..............................................................10
6.1.4 Manually Cleaning Components, Cabinet and Other .....................10
6.2 Manual Cleaning of Smog Hog Components ..........................................10
6.2.1 Type of Detergent ...........................................................................10
6.2.2 Detergent Strength..........................................................................10
6.2.3 Water Temperature.........................................................................10
6.2.4 Agitation/Impingement ....................................................................10
6.2.5 Cleaning Cycle Duration .................................................................10
6.2.6 Rinse Procedure .............................................................................10
6.2.7 Dry-Out Time ..................................................................................11

ii

iii
TABLE OF CONTENTS
Page
7. MANUAL CLEANING METHODS........................................................................11
7.1 Soak Tank ................................................................................................11
7.2 Portable Pressure Washer.......................................................................11
7.3 Automatic Parts Washer ..........................................................................11
7.4 Other Cleaning Considerations................................................................11
8. APPEARANCE OF COMPONENTS AFTER CLEANING ...................................11
8.1 Unicell ......................................................................................................11
8.2 Pre-filters/After-filters................................................................................11
8.3 Cabinet.....................................................................................................11
9. PART REPLACEMENT PROCEDURES AND ADJUSTMENTS.........................12
9.1 Ionizer Wire Replacement........................................................................12
9.2 Door Feed Through Insulators .................................................................12
9.3 Indicator Light...........................................................................................12
9.4 Blower Lubrication....................................................................................12
9.5 Component Access Door Gasket Replacement ......................................12
9.6 Power Pack Enclosure Push Rod Adjustment.........................................13
10. TROUBLESHOOTING .......................................................................................14
10.1 Troubleshooting Procedure......................................................................14
10.2 High Voltage Probe Measurements .........................................................17
10.3 Bench Test Procedure .............................................................................17
10.4 Troubleshooting Guide.............................................................................19
11. ORDERING PARTS...........................................................................................21
11.1 Replacement Parts...................................................................................21
11.2 Returning Parts ........................................................................................21
11.3 Freight Cost..............................................................................................21
12. APPENDIX ......................................................................................................22
12.1 Wiring Diagrams....................................................................................22/23
12.2 Power Pack Enclosure Illustration ...........................................................24
12.3 Remote Start/Stop Assembly...................................................................24
12.4 Power Pack Enclosure Assembly Parts List ............................................25

iv
IMPORTANT SAFETY INSTRUCTIONS
To reduce the risk of fire, electric shock, or injury when using your air cleaner, follow these basic precautions:
SAFETY PRECAUTIONS
We have provided many important safety messages in this manual on your Smog-Hog SG. Always read and obey
all safety messages.
• Wear protective clothing and safety glasses when handling
collector components or servicing the unit.
• Use proper lifting and rigging equipment to install your
electronic precipitator.
• The electrostatic precipitator should be properly grounded.
• Disconnect power before servicing.
• Replace all access panels before operating.
• Do not operate the unit with component door(s) open.
• Electrical connections should only be completed by
qualified personnel and be in accordance with local
and national codes and regulations.
• Do not collect emissions which are explosive
• Do not use in explosive atmospheres.
• Use non flammable cleaners.
• Keep flammable materials and vapors, such as gasoline,
away from the unit.
• The unit should be inspected frequently and contaminants
removed to prevent excessive accumulation which may
result in flash-over or fire damage.
• Operate only in a safe and serviceable condition.
• Operating temperature to the air stream should not
exceed 120° F.
!
!DANGER
!WARNING
!WARNING
!CAUTION
CAUTION
This is the safety alert symbol.
This symbol alerts you to potential hazards that can kill or hurt you and others. All safety messages will follow the
safety alert symbol and the word “DANGER” “WARNING” or “CAUTION”. These words mean:
Indicates a hazardous situation which, if not avoided, will result in death or
serious injury.
Indicates a potentially hazardous situation which, if not avoided, could result
in death or serious injury.
Indicates a potentially hazardous situation which, if not avoided, may result
in minor or moderate injury.
CAUTION used without the safety alert symbol indicates a potentially
hazardous situation which, if not avoided, may result in property damage.

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Revised 09/09 Smog-Hog
SG Series Model
1. HOW THE SMOG-HOG SG SERIES
WORKS
The SG is a self-contained air cleaning system which
removes dry or oily airborne contaminants from
industrial work areas. Operating on the principle of
electrostatic precipitation, it pulls air past a mechanical
prefilter, charges and collects airborne particulate, then
exhausts clean air to the environment.
Prefilters serve the dual purpose of trapping large
particulate and diffusing the airstream evenly into
precipitator components at low, controlled velocity.
Air passes through an ionizing section, where nearly
all particulate is charged, then on to a collecting
section where charged particles are repelled from
similarly charged plates and drawn to ground plates.
Agglomerated particles separated from collection plates
during unit start-up are trapped on an afterfilter, allowing
clean air to pass through the system blower at all times.
SG units may be ducted directly to the contaminant
source or unducted to remove particulate from the
general environment. Units are generally suspended
from the ceiling but may be cradle or skid mounted to
suit the application. Units without blowers are supplied
where air is moved through the units by others.
The Smog-Hog SG uniquely combines high airflow
and high efficiency. Its compact “unicell” design
helps minimize contaminant by-pass. It is suitable for
operation with or without in-place cleaning. All SG units
supplied with blowers have adjustable louvers to direct
exhaust air as required.
Ionizing and collecting sections operate on high DC
(direct current) voltage and low amperage, yielding a
very low power consumption of 75 watts maximum per
power supply. The high voltage creates a powerful field
for trapping small to submicronic particles. At start-up,
the unit’s power supply charges each unicell while the
system blower begins to move air through the unit.
2. INSPECTION OF EQUIPMENT
Upon receipt of your SMOG-HOG SG, check carefully
for possible shipping damage. (Any damage to carton,
skid, etc., may be a warning to you that rough handling
has caused internal damage.) Units supplied with
accessories, such as an In-Place Cleaning System,
will arrive in multiple cartons. Check cartons versus
bill of lading. The detergent container is shipped
independent of units.
Notify your delivery carrier and enter a claim if any
damage is found.
3. INSTALLATION PLANNING
3.1 UNDUCTED OR AREA CAPTURE
Consideration should be given to the placement of the
precipitator to maximize its effectiveness. The number
of units required to clean the air will depend on the
layout of the room and the concentration of pollutants.
Because it is necessary to develop proper airflow patterns,
the placement and number of precipitators should be as
suggested by UAS or your local representative.
3.2 DUCTED OR SOURCE CAPTURE
When your SG is used as a ducted source collector,
the enclosure or pick-up hood design is important for
adequate capture of con taminants. Drive pulleys and
belts have been selected to provide proper airflow at
the design static pressure specified. Pulleys and belts
should not be replaced without first contacting UAS
Customer Service at 1-800-252-4647.
3.3 SPECIFICATIONS
Smog-Hog SG Series are self-contained, two-stage,
Penney-type, electrostatic precipitators complete
with fully interlocked, energy limiting UL “recognized
component” power packs, mechanical prefilters, unicell
construction (combination ionizer and collection cell),
afterfilters, indicator lights and interlock switches. All
models except those designated “X” are supplied
with motor/blower sets mounted in an integral blower
housing. All high voltage wiring is external to the
component enclosure.
Figure 1
SG SERIES NOMENCLATURE
H HIGH PRESSURE
M TANDEM
A IN PLACE CLEANING
S STACKED (2 ON 2) CELL
CONFIGURATION
T TEE SHAPED CONFIGURATION
X WITHOUT BLOWER
2 TWO UNICELLS
4 FOUR UNICELLS
6 SIX UNICELLS
SMOG-HOG SERIES

2
Revised 09/09 Smog-Hog
SG Series Model
MODEL SG-2
MODEL SG-4S

3
Revised 09/09 Smog-Hog
SG Series Model
MODEL SG-4T
MODEL SG-6
Figure 2
Installation Dimensions (in./cm.)

4
Revised 09/09 Smog-Hog
SG Series Model
4.2 COLUMN OR WALL MOUNTING
Units may be suspended from cantilevered supports
on walls or columns. SG-2 and SG-4S units may be
mounted against columns but should extend at least
24” from walls in keeping with good airflow practice.
SG-4T units require 36” clearance from walls and
columns for blower compartment access.
Prior to installation, refer to specifications in Figures 1,
2 and 3. Note mounting and clearance requirements
and allow for proper plumbing and electrical access.
Allow at least 36” for door swing and component access
on the door side of the unit. All SG models require 18”
clearance from overhead obstructions for access to
electrical junction boxes.
4. INSTALLATION
Carefully remove the unit from the shipping con-
tainer, inspecting for shipping damage. For ease of
installation, open access door and remove unicells and
filters from the cabinet.
Units suspended from the ceiling require 1/2” threaded
rods installed in top corners of the units. See Figure 2
for mounting hole locations for all models. Additional
support should be used for auxiliary equipment or
ducting. The SG should not be used for support of
personnel or material.
Reinstall the components which were removed earlier
to facilitate mounting the unit.
4.1 CEILING MOUNTING
SG units are designed for suspended mounting,
using 1/2” all-thread rod as shown in Figure 4.
Customer should take care to ensure that roof
trusses are adequate to support unit weight and
support members. In Figure 4, angle iron cross
members are secured between roof trusses.
Turnbuckles greatly simplify rod installation.
Rod length should be kept to a minimum
36” preferred). All SG units have cross-broken
sheet metal sumps with drains centered under the
collection section.
Model Weight (lbs)
SG-2X 250
SG-2X-A 275
SG-2 400
SG-2-A 450
SG-4X 375
SG-4X-A 400
SG-4S 750
SG-4S-A 800
SG-4T 825
SG-4T-A 875
SG-6X 700
SG-6S 1,870
SG-6S-A 1,960
4.3 BOTTOM SUPPORTS
Units may be supported from underneath, provided
care is taken to assure good drain connection and
leak-free sumps.
4.4 DRAINS
All SG units are supplied with 1 1/2” FPT drains. If dry
material is to be collected and in-place cleaning is not
supplied, then drain connection(s) should be plugged.
If in-place cleaning is supplied, or a liquid is collected
within the SG unit, refer to Figure 5 for drain and drain
trap installation.
4.5 ELECTRICAL CONNECTIONS
All SG units are provided with terminal blocks in a
top-mounted electrical box for incoming power
connections. Units with blowers have box- mounted
step-down transformers to supply re quired 115 volts to
power packs. Units without blowers are equipped for
115 volt supply only (see Figure 6).
Figure 4
Typical Ceiling Mount
Model SG-2
Figure 3
SG Unit Weights

5
Revised 09/09 Smog-Hog
SG Series Model
Built-in magnetic starters, overload relays and fuses
are supplied on all blower units with in-place cleaning
and those with special agency labels. Remote on/
off switches with interlocks are provided on all blower
units with in-place cleaning (see Figure 8). Power
connection to the unit should be completed per wiring
diagram inside the field wiring box. For units with in
place cleaning systems, refer to In-Place Cleaning
Owner’s Manual.
Installation should comply with all state and local codes.
If no codes apply, installation should comply to National
Electrical Code. Refer to Section 12.2 for wiring
diagrams).
Figure 5
Drain and Trap Installation
!CAUTION
When electrical control panels are supplied by
others, an electrical interlock should be provided
for the SG power pack circuit and the unit exhaust
blower. This provides safe operation of the
Smog-Hog® SG. Do not operate the power pack
circuit with the system exhaust blower off line.
Figure 6
Units Without Blowers

6
Revised 09/09 Smog-Hog
SG Series Model
4.6 POWER PACK
Input to the high voltage power pack range from 90 to
130 VAC, 60 Hertz. This is supplied by the power line
or the step-down transformer as shown by the wiring
diagram inside the junction box.
4.7 AIR DIFFUSER
The adjustable air diffuser outlet grille can be set to any
desired open position.
Unducted Installation (for area capture): Air diffuser
should be set for maximum contaminant capture and
even dispersion of clean air. The pattern should be
that suggested by UAS or your local SMOG-HOG
representative.
Ducted Installation (for direct capture): Air diffuser can
be set to any position that is compatible with personnel
comfort.
5. START UP AND OPERATION
5.1 INSTALLING COMPONENTS
If unicells and filter media were removed for shipment
or installation, refer to Figure 20 for proper installation
and electrical contact alignment. Filter media is
installed as after filters (after the unicell) with optional
In-Place Cleaning. Do not install filter media as pre-
filters (before the unicell) with In-Place Cleaning.
This will reduce the effectiveness of the wash cycle
by 50 percent. The filter media is utilized as pre- and
after-filters if the SG is not equipped with In Place
Cleaning. The SG inlet plenum, if supplied by UAS,
could have filter media or impingement filters. The inlet
plenum should be inspected that all filters are installed.
5.2 BLOWER ROTATION
For proper airflow, the blower should be operating in
the correct direction. If the blower is operating in the
reverse direction, air will move in the proper direction,
but at significantly reduced rates.
To check rotation:
1. Place SG unit off line.
2. Remove or open blower panel from SG unit to
observe rotation.
3. Place SG unit on line for less than one minute.
4. Place SG unit off line.
5. As the blower pulley slows down, observe the
direction of rotation.
6. Note directional arrow located on the blower
housing.
Extreme care should be exercised when operating
blowers with motor/drive belts exposed. Loose
fitting clothing can easily be drawn into these
moving parts.
7. If blower wheel was not rotating in the correct
direction, disengage main three-phase fused
disconnect switch.
Do not attempt to rewire electrical “live”
connections.
8. Open power panel and reverse any two of the
three wires at the terminal strip (Ll, L2, and L3).
9. Engage the fused disconnect and place SG unit
on line, confirming blower rotation.
!WARNING
!WARNING
Figure 7
Blower Units Without In-Place Cleaning
Figure 8
Blower Units With In-Place Cleaning

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Revised 09/09 Smog-Hog
SG Series Model
5.3 BLOWER CURRENT MEASUREMENT
Using an ammeter measure the current amperage of
the blower motor. The measurement should not exceed
the full load ampere (FLA) rating identified on the
blower motor nameplate. If the amperage is excessive,
perform the following: check overload relay for proper
setting per motor FLA, and measure blower rpm.
Blower speed can be measured with a tachometer.
Call UAS Customer Service for blower rpm
specification. The serial number of the unit is required
to determine the blower rpm factory setting.
5.4 MOTOR VARIABLE PITCH PULLEY
ADJUSTMENT
Increasing blower speed (RPM) will increase airflow
(CFM) and current (amps). To increase speed, close
the variable pitch pulley (from “normal,” as in Figure
9A, toward “full closed,” as in Figure 9B). Decreasing
blower speed (RPM) will decrease airflow and current.
To decrease speed, open the variable pitch pulley
(from “normal,” as in Figure 9A, toward “full open,” as
in Figure 9C). Five turns open (T.O.) is the maximum
setting.
To adjust the variable pitch pulley, refer to Figures 9
and 10.
1. Loosen motor base nuts, adjust motor slide base
and remove the drive belt.
2. Loosen set screw “A” to clear the drive key
between pulley halves.
3. Remove the key.
4. Adjust pulley in increments of one turn to the
desired setting.
5. Install key and tighten set screw “A.”
6. Install drive belt.
7. Loosen set screw “B.”
8. Align belt centerlines of motor and blower pulleys
using straight edge and square.
9. Set belt tension using a belt tension gage.
Improper blower speeds adversely affect system
performance. Contact the factory before adjusting
motor variable pulley setting.
5.5 BLOWER BELT TENSION
ADJUSTMENT
The drive belt tension adjustment is critical within the
first 24 hours of the system exhaust blower operation.
During this 24 hour period the initial stretch of the belt
occurs which requires a belt tension adjustment. If
this tension adjustment is not completed the belt will
wear prematurely, requiring a replacement. A drive belt
tension gage should be used for adjusting belt tension.
If fan belt tension is not per specifications set tension
by adjusting the motor slide base, refer to Figure10.
Loosen four bolts holding the motor to the base and
turn the adjustment bolt(s) on the base. Check with a
steel straight edge to make sure that motor pulley and
blower pulley is still aligned. Tighten motor mounting
bolts.
5.6 POWER PACK OPERATION
The power pack voltage range is 90 to 130 AC, 60 Hz,
supplied by others. If the electrical panel is supplied
by others the power pack circuit should be electrically
interlocked with the blower circuit. The SG unit will be
operating in an unsafe mode if an electrical interlock is
not installed. A power pack enclosure wiring diagram
is illustrated in Section 12.2. The power pack indicator
light on the unit is illuminated when high voltage output
is within specifications. If the indicator light is flashing or
fails to illuminate refer to Section 10 Troubleshooting.
!NOTICE
Figure 9
Motor Pulley Settings
Figure 10
Motor/Blower Schematic
999

8
Revised 09/09 Smog-Hog
SG Series Model
5.7 POWER PACK ENCLOSURE PUSH ROD
AND GROUNDING BAR
Each power pack enclosure has a captive, spring
loaded “push rod” extending into the module.
Factory-set, the push rod serves the following purposes:
1. High voltage DC power is automatically shut down
with the unicells removed from the module.
2. Whenever a module door or power pack enclosure
lid cover is opened, the limit switch is disengaged,
placing 115 VAC off line to the power pack.
3. Opening either of the module door or the power
pack enclosure lid cover also releases a spring
loaded push-rod, placing the grounding bar in
contact with the cell door feed through insulator
acorn nut, removing residual cell voltage.
The opening of only the module door is such that
the grounding bar may not completely short out
the cell circuit as a precaution. Perform the
grounding procedure. Refer to Figures 14 and 15.
During normal operation, (refer to Figures 11, 12 and
13) with unicells in place, the component door (10)
and the power pack door closed (3), the push rod (5)
is in contact with unicell endplate (6). Push rod
extension (1) is in contact with the ground bar (2) and
bends to contact the limit switch (4) refer to Figure 11.
Upon opening the component door (10), the push rod
(5) is released from the unicell endplate (6) and spring
(7) compression is relieved, breaking the contact of the
push rod extension (1) from the ground bar (2), placing
AC voltage off line to the power pack and causing the
grounding bar to contact the acorn nut (8), refer to
Figure 12. When opening the power pack door (3),
the spring (7) remains compressed but the grounding
bar (2) is pulled from the push rod extension (1) as
the power pack door (3) is opened. AC voltage is
placed off line to the power pack by opening the limit
switch (4) which the unicells are grounded through
the acorn nut (8), but with the contact spring (12) fully
compressed, refer to Figure 13.
5.8 IN-PLACE CLEANING (OPTIONAL)
The spray nozzles to the wash headers can become
clogged or otherwise obstructed due to debris within the
field piping. At initial start-up, water should be purged
before final pipe connection at the SG. The Y strainer
to the detergent injector tee assembly should also be
checked for debris. A wash cycle should be initiated
before placing the SG on line, refer to the In Place
Cleaning Owner’s Manual for the start up operational
procedure.
!NOTICE
Figure 11
Component Door and Power Pack Door Closed
Figure 12
Component Door Open and
Power Pack Door Closed
Figure 13
Component Door Closed and
Power Pack Door Open

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Revised 09/09 Smog-Hog
SG Series Model
missing?), ionizer weld nut (missing?), ionizer standoff
insulators (contaminant build up) and ionizer wires
(contaminant build up? missing?), repair or replace.
Ionizer wires should be taut and centered between
ground plates. Ground plates between each ionizer wire
should be straight and parallel. Inspect the collector
cell section of each unicell, noting the condition of the
contact spring (distorted? bent? missing?) cell contact
screw (missing?), cell plates (bent? warped?) should
be parallel and straight, repair or replace. Cell hot
plates (smaller dimensional plate) should be centered
between ground plates (larger dimensional plate).
Cell plates should not have contaminant bridging
between the cell plates or at support structure corners
or the triangular insulators. Inspect filters, noting the
condition (contaminant build up?, media separation?,
bent frames?) should not have contaminant build
up restricting airflow, repair or replace. Module
drain sumps should not have moderate to extreme
contaminant build up or an accumulation of wash water
if equipped with In Place Cleaning. Unicell module
support tracks should be free of contaminant build-up
for ground contact. Module and access doors gaskets
should be in-place and in good condition.
5.9 PLACING SG ONLINE
Depending upon job specifications or other
requirements, the SG may be placed on line by a
customer supplied switch, or UAS Remote Start/Stop
Assembly. The indicator light on each power pack
enclosure should be illuminated. The power pack
enclosure toggle switch should be in the “up” position
for the indicator light to be illuminated. If the indicator
light is not illuminated after checking the toggle switch
or the indicator light is flashing, refer to Section 10
Troubleshooting. For operation of auxiliary system
equipment, refer manufacturer’s owner’s instructions for
proper operating procedures.
6. MAINTENANCE AND MANUAL
CLEANING Figure 14
Grounding the Collecting Section
Figure 15
Grounding the Ionizing Section
!CAUTION
The SG unit should be inspected frequently and
collected contaminant removed from the system
regularly to prevent excessive accumulation
which may result in a flashover or risk of fire.
6.1 NORMAL MAINTENANCE
Once the unit is operational, periodic maintenance is
necessary to assure proper performance. Follow a
regular pattern of unit observation and log abnormal
conditions. Since units reflect the process under control,
maintenance patterns will vary accordingly.
6.1.1 CHECK POWER PACK ENCLOSURE
INDICATOR LIGHTS
The SG should be monitored daily by observing that
the indicator light is illuminated to each power pack
enclosure. Occasional arcing (flashing of an indicator
light) is normal. An established arcing condition or dead
short condition (continuous flashing of an indicator light)
or the indicator light is not illuminated is not normal
should be corrected.
6.1.2. CHECK COMPONENT APPEARANCE WEEKLY
A visual of a module could identify problems such
as moderate to extreme contaminant build up to the
unicells even though the indicator lights are illuminated.
This will be helpful in scheduling a manual cleaning
of the components, refer Section 6.2. To check the
condition of the unicells, place the SG off line. Open
the module door and perform the grounding procedure,
refer to Figures 14 and 15, inspect the condition of
the unicells, filters, door feed-thru insulators and
interior of the cabinet. Experience will dictate whether
contaminant build-up is excessive. Contaminant build
up will decrease high voltage to the ionizer and collector
cell circuit. When accessing a module, always clean
the two door feed-thru insulators.
The following should be inspected.
Inspect the ionizer section of each unicell, noting
the condition of the contact spring (distorted? bent?

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Revised 09/09 Smog-Hog
SG Series Model
6.1.3 PERFORM IN PLACE CLEANING
If the SG is equipped with In Place Cleaning a daily
wash cycle is required refer to In Place Cleaning
Owner’s Manual and Sequence of Operation
Instructions. A typical seven day wash cycle would be
six day waterwash without detergent with the seven
day a detergent wash. The detergent wash frequency
can be increased up to everyday. The auto wash cycle
is initiated by a UAS time clock, with the wash cycle
sequencing, wash cycle times, and detergent frequency
through the UAS Main Electrical Panel. A wash
cycle can be manually initiated, identical operation
as the auto wash cycle, for an additional wash cycle.
A wash cycle whether a manual or by time clock can
only be initiated with the SG off line. The wash cycle
frequency could be increased or decreased depending
on visual inspection of the components and high
voltage measurements. When the SG is placed on
line after a wash cycle, the power pack enclosure(s)
indicator light(s) may intermittently or continuously blink
for approximately 60 minutes. If this condition exceeds
60 minutes, refer to Section 10 Troubleshooting.
6.1.4 MANUALLY CLEANING COMPONENTS,
CABINET AND OTHER EQUIPMENT AS REQUIRED.
The unit components should be manually cleaned one
to three month interval depending upon application/high
voltage measurements refer to Section 6.2.
6.2 MANUAL CLEANING OF SMOG-HOG
COMPONENTS
There are a number of methods for manual cleaning,
certain key cleaning criteria contribute to the
effectiveness of every method. These include the type
of detergent, detergent strength, water temperature,
agitation/ impingement, duration, rinse procedure and
dry-out time.
6.2.1 TYPE OF DETERGENT
In general, the detergent used on most hydrocarbons
(e.g., oily residues) will be alkaline in nature. It is
extremely important that the detergent have a built-in
buffering agent to reduce aluminum deterioration.
6.2.2 DETERGENT STRENGTH
Detergent concentration in a mixture with water varies
with the application from 1:1 to 20:1 parts water to parts
detergent. For any contaminant condition, the best
course is to use a cleaning solution per the detergent
manufacturer’s directions. More or less detergent
may eventually be required for effective cleaning at
reasonable detergent cost. The recommended factory
detergent concentration is 5% (20:1).
CAUTION
Never mix caustic and alkaline detergents for
manual or in-place cleaning. Detergent mixing
could cause rapid heat release, gel formation
or some other undesirable condition. Complete
purging of system piping is necessary when
changing detergents.
6.2.3 WATER TEMPERATURE
Detergents can be up to twice as effective in hot water.
Hot water alone is very effective in softening built-up
residue. Water temperature should be 140°F to 170°F,
not to exceed 180°F.
6.2.4 AGITATION/IMPINGEMENT
These methods are virtually the same, with
impingement being the most extreme form of agitation.
Any liquid movement over built-up residue will remove
a layer, allowing detergent to work on the next layer. A
reduction in cleaning time duration usually results.
6.2.5 CLEANING CYCLE DURATION
In most cleaning methods, adequate time should be
allowed for the detergent to remove the contaminant
thoroughly. Reaction time will vary depending on
detergent strength, temperature and agitation.
Guidelines for mixing, heating and expected results are
included on specification sheets for most detergents.
Time is necessary for effective cleaning. Soaking may
seem slower and less effective than high impingement
and/or hot water above 180°F for cleaning action, so
personnel should be forewarned about using excessive
pressure or temperature to shortcut the cleaning
process. High pressure or stream spray cleaning until
plate edges are shiny is not effective. Not only will
penetration to the cell core not occur, but warping and
bending of the plates may result as well. Patience and
thoroughness of cleaning best preserve the integrity of
the components in the long term. Soaking and gentle
rinsing provides for best results.
6.2.6 RINSE PROCEDURE
Cleaned components should be rinsed off quickly and
thoroughly to remove remaining contaminants. Some
detergent residue will remain if rinsing is not performed.
The residue may contribute to voltage bleed-down when
the unicell is placed in operation. Also, even though the
detergent is “buffered” prolonged contact could cause
minor corrosion. Hot water should be used for rinsing.

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Revised 09/09 Smog-Hog
SG Series Model
6.2.7 DRY-OUT TIME
Unicells and filter media should be dry before the SG
is placed into operation. Startup of a wet system will
cause dead short conditions to the ionizer and collector
cell circuits. Wet unicells and filter media should be
placed in a warm room for drying. Techniques such
as hand wiping insulators and blow drying unicells and
filter media with compressed air will decrease drying
time. Another method for drying cleaned components
is installing the unicells and filter media in the SG and
placing on the system blower on line, with all power
pack enclosure toggle switches placed in the “off”
position for 30 minutes.
7. MANUAL CLEANING METHODS
The manual cleaning method selected will depend
on the type of contaminant, rate of deposit, facility
limitations such as cleaning time windows (process
downtime) and available utilities. All cleaning methods
listed in this section are acceptable.
7.1 SOAK TANK
This method involves placing unicells and filter media
in an agitated solution of hot water and detergent and
is the most effective method. With proper detergent
selection, this procedure will quickly remove most
contaminants. Unicells and filter media should not be
placed in highly concentrated detergent solutions or
allowed to soak for extended periods, (e.g., overnight),
especially at elevated temperatures. Extended soaking
(e.g., days) in solvent or detergent solution will
degrade components over time and should be avoided.
7.2 PORTABLE PRESSURE WASHER
A self-contained pressure washer with a spray wand
can be an effective cleaning method, providing it is
used with caution. Care should be taken not to expose
the unicells to close-up and prolonged blasts of high
pressure/temperature, causing cell plate deformity,
requiring a replacement set of unicells and filter media.
7.3 AUTOMATIC PARTS WASHERS
Certain commercially available units combine and
automate the features necessary for effective cleaning,
including water heating, detergent injection, agitation,
rinsing and drying.
7.4 OTHER CLEANING CONSIDERATIONS
The previous methods address the cleaning of
unicells and filter media. The SG cabinet should also
be periodically cleaned (i.e., during normal planned
downtimes) to reduce contaminant build up. High
voltage output of the power packs should also be
checked when manual cleaning is performed.
8. APPEARANCE OF COMPONENTS
AFTER CLEANING
Components should have a clean, not necessarily
“new,” aluminum appearance. Moderate discoloration
will not affect system efficiency. Checklist for acceptable
components.
8.1 UNICELL
1. Frame, end plates and cell plates are free of
contaminant build-up (residual contaminant has
been removed between plates and at comer
supports).
2. The frame is square, cell plates are parallel and
cell hot plates are centered between ground
plates.
3. Ionizer standoff insulators and cell triangular
insulators are cleaned (no residual coating).
Cracked or carbon-tracked insulators have been
replaced.
4. Ionizing wires and springs are intact and taut,
centered between plates and free of coatings.
5. Contact springs and contact screws are properly
located, and replace missing contact hardware.
Refer to Figure 20.
6. Contact springs are not deformed.
7. Bent or broken parts have been repaired or
replaced.
8.2 PRE-FILTERS/AFTER-FILTERS
1. Aluminum media and frame are free of
contaminant.
2. Frame is square and media is intact.
3. Filters are always installed with drain holes down
and arrow on each frame pointing in the direction
of airflow
8.3 CABINET
1. Door feed-thru insulators are cleaned and white.
2. Door gaskets are cleaned and intact.
3. Component tracks are free of contaminant build up
(for unicell grounding).
4. Module drain sumps are cleaned and free-flowing.
5. Interior is free of extreme contaminant build-up.
6. Blower wheel and housing is free of extreme
contaminant build-up.
7. Preconditioning equipment, if so equipped, (inlet
plenum with baffle filters, cooling coils, etc.)
has been checked for excessive pressure drop,
cleaned if necessary.
8. Nozzles on all in-place cleaning system headers,
if so equipped, are not plugged.

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Revised 09/09 Smog-Hog
SG Series Model
9. PART REPLACEMENT
PROCEDURES AND ADJUSTMENTS
9.1 IONIZER WIRE REPLACEMENT
(REFER TO FIGURES 16 AND 17)
1. Remove damaged wire from each spring.
2. Replace spring if damaged or missing.
3. Loop one end of new wire over bottom spring. Pull
top wire loop with pliers over top spring.
4. Release spring gently. Wire should now be taut
and centered.
NOTE: If replacement wires are not available, remove
broken wires and tension springs from the
ionizer section. Install unicell into the cabinet
until parts are available.
9.2 DOOR FEED-THRU INSULATORS
1. Place toggle switch in “off” position.
2. Open power pack enclosure lid cover, perform
grounding procedure refer Figures 14 and 15,
3. Remove high voltage wire by removing #10-32
hex nuts.
4. Remove insulator retaining nut.
5. Open module door and remove the long screw
from the insulator.
6. Remove the insulator from the interior of the
module door by using a hammer.
7. Clean silicone sealant from module door surface.
8. Install replacement insulator, reversing the above
procedure, and applying a thin coat of Silicone
sealant to base of insulator.
9.3 INDICATOR LIGHT
1. Open the power pack enclosure lid cover.
2. Disconnect the red and black wires from the
indicator light which is connected to wires “9”
and “2”.
3. Remove indicator light installation nut. The
indicator light located on each power pack
enclosure is polarity sensitive. For proper
operation, the two wires from the indicator
light should be connected as follows, red wire
connected to “9” wire from the power pack, black
wire connected to “2” wire from the power pack.
If the wires are reversed, the indicator light will
not illuminate.
9.4 BLOWER LUBRICATION
The blower bearings require lubrication at a 2 to 3
month interval (petroleum lubricant lithium NLGI grade
2 grease). The bearings should be lubricated with the
blower in operation. A hand operated grease gun is
required performing one to two injections slowly, do
not exceed two injections. Excessive injections/grease
will cause bearing seal failure, contributing to bearing
failure.
Figure 16
Attaching
New Ionizer Wire
Figure 17
Correct
Ionizer Wire Position
9.5 COMPONENT ACCESS DOOR GASKET
REPLACEMENT
As shipped from UAS, gasketed component access
doors have been carefully sealed against leakage of
liquids from the air cleaner cabinet. Should leakage
occur, slight adjustment of the latch paws on the back
of the door handles may solve the problem. However,
extreme care should be exercised in compressing door
gasket beyond its design limits. Before adjusting for
gasket deflection, check for the following:
1. Door or cabinet damage.
2. Deformed or torn gasket.
3. Leakage from some other source.

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Revised 09/09 Smog-Hog
SG Series Model
Collection components should be removed and
replaced with great care to preserve gasket integrity.
Should damaged gasket require replacement, call UAS
Customer Service for the proper gasket material.
GASKET LENGTHS
9.6 POWER PACK ENCLOSURE PUSH ROD
ADJUSTMENT
Tools required:
• 6” adjustable or 5/16” open-end Wrench.
Refer to Figure 11.
1. Close module door (10) with unicells installed.
2. Open power pack enclosure lid cover (3).
3. Loosen 5/16” hex jam nut (9), then back off push
rod extension (1) to end of threads.
4. Close power pack enclosure lid cover, listening
for point where limit switch (4) is engaged.
5. Adjust rod extension (1) inward until limit switch
(4) engages approximately one inch before the
power pack enclosure lid cover closes (3).
6. Tightened hex jam nut.
7. Close power pack enclosure pack lid cover
(3) and latch.
UAS NUMBER OF LENGTH
MODEL DOORS PER DOOR (FT.)
SG-2 1 6
SG-4S 1 10.5
SG-4T 2 6
SG-6 1 16
TO CHANGE GASKET
Refer to Figure 18
1. Remove existing gasket, making sure to scrape off
any residual silicone sealant.
2. Trim one edge of gasket neatly and evenly.
3. The door gasket internally has three lips to one side
of the gasket and one lip to the other side. The door
gasket should be installed with the three lips towards
the interior of the cabinet.
4. The door gasket should be formed to the complete
cabinet flange before applying silicone sealant.
Place the trim edge at the top center of the cabinet
lip edge and press gasket in place, ending at the
same location. Do not trim excess door gasket.
5. Remove door gasket and apply silicone sealant to
the inside of gasket or on the inside edge of the
cabinet flange. Place the trim edge at the top center
of the cabinet lip edge and press gasket in place,
ending at the same location. Trim excess gasket
and remove silicone sealant. Make sure the gasket
is firmly bottomed on the flange by tapping with a
rubber mallet or the gasket may not seal against the
door properly.
6. Check that the distance from the inner face of the
access door to the latch tongue measures 7/8”. Slight
adjustments may be necessary due to sheet metal
variations.
Figure 18
Door Gasket Installation

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Revised 09/09 Smog-Hog
SG Series Model
10. TROUBLESHOOTING
The SG unit can consist of one or more modules. Each
module represents an independent collection system,
of 2 unicells in series with a power pack enclosure. The
power pack enclosure indicator light is the reference
in determining the module status. The indicator light
illuminated represents a working module, usually within
high voltage specifications. An indicator light flashing or
not illuminated exhibits an abnormal condition.
TOOLS REQUIRED
• Multimeter
• High voltage probe accessory for the multimeter
• High voltage test cables (2), 3’ in length with test clips
at each end
• Basic hand tools
• One power pack (UAS Part Number 21-1216)
• AC cable with three prone plug (for the wall
receptacle), opposing end of cable should have two
connectors for the power pack and a test clip for the
ground wire. The ground wire should be secured to
the ground stud on the power pack.
PERFORM BEFORE TROUBLESHOOTING
The following should be checked to the module(s)
in which the indicator light(s) is flashing or is not
illuminated. Corrections should be completed and parts
replaced.
• Toggle switch is in the on position to the power
pack enclosure.
• Check adjustment of the push rod which engages
the interlock switch refer to Section 9.6.
• Proper electrical alignment to the unicell
components. Refer to Figure 20.
• The proper number of unicells are installed to the
module.
• Unicell components have a moderate to extreme
contaminant build up, manually clean the unicell
components.
• Ionizer wires and tension springs missing or
broken, remove broken wires and springs from the
drain sump.
• Ionizer standoff insulators, cell triangular
insulators, and or door feed through insulators
display moderate to extreme contaminant build
up, broken or carbon tracked insulators (imbedded
black streak which cannot be removed by
cleaning, replace insulator).
10.1 TROUBLESHOOTING PROCEDURE
CAUTION
Risk of electrical shock. The high voltage circuits
to the ionizer and collector should be grounded
before removing the power pack, high voltage
wires, door feed through insulators and unicell(s).
The grounding procedure can be accomplished
by waiting one minute after placing the toggle
switch in off position or by referring to Figures
14 and 15. An internal resistor within the power
pack discharges the residual high voltage. The
grounding procedure statement is not identified
within the troubleshooting steps but should be
performed. The power pack total current output
is limited to a maximum of 5 milliamps to assure
personnel safety.
Power pack enclosure(s) service voltage is
120VAC. This can be lethal. Voltage (120 VAC)
is present within the power pack enclosure
even though the toggle switch is placed in the
off position.
HIGH VOLTAGE SPECIFICATIONS:
Ionizer Circuit Operating Range: 10.0 to 11.8 KVDC
Collector Cell Circuit Operating Range: 5.0 to 7.5 KVDC
There are two factors which will elevate ionizer voltages
above 12.0 KVDC.
1. The ionizer wires are heavily coated with
contaminant (two to three times or greater,
the diameter of the wire). This will decrease
collection efficiency.
2. There are “run away” voltages to the power pack
requiring power pack replacement, above 12.0
KVDC to the ionizer circuit, and 7.5 KVDC to the
collector cell circuit.
There will be continuous cell arcing if cell voltages
exceed 7.5 KVDC. This is also caused by “run away”
voltages to the power pack requiring power pack
replacement. A high voltage measurement can be
performed by removing both the high voltage wires from
the power pack to determine high voltage output or
refer to “Testing the Power Pack” in the “Bench Testing
Procedure.” The high voltage measurement should not
exceed “High Voltage Specifications.”
If there is a dead short condition or arcing condition
usually the problem is within the collector cell. The
power pack should be confirmed that the power pack
is operational, start with step (1), before proceeding to
the step (2). In the event of a dead short condition the
power pack is designed to “shut down” the high voltage
to the ionizer and collector cell circuits causing the
!CAUTION
!WARNING