Duracell 75 User Manual

CUSTOM PACKAGED

ELECTRONIC

AIR CLEANER

Model 75 Series Units

WITHOUT

Wash System

•

INSTALLATION

•

OPERATION

•

SERVICE

For Model Numbers

75- ______-01 & -03

Electrostatic Precipitators for

Commercial & Industrial

Applications

Accepted For Use
City of New York
Department of Buildings
MEA 288-01-E and 88-99-E

101 McNeill Road • Sanford, NC 27330

[phone] • Fax: [phone] • [phone]

www.trioninc.com

MANUAL PART NO. 154024-002• July 2002

TABLE OF CONTENTS

SECTION I DESIGN

For The System Design Engineer Page

1. General Description ................................................................................................................... 1

2. System Design and Layout........................................................................................................ 1

3. Outdoor Installations ................................................................................................................. 2

SECTION II INSTALLATION

For The Installing Contractor

1. Unpack and Inspect ................................................................................................................... 2

2. Position Air Cleaner Cabinet..................................................................................................... 2

3. Connect Adjoining Ductwork .................................................................................................... 2

4. Connect Drain............................................................................................................................. 3

5. Mount Controller/PWM Power Supply ...................................................................................... 3

6. Complete Wiring

A. High Voltage Wiring................................................................................................................ 3

B. Primary Wiring ........................................................................................................................ 3

C. Grounding ............................................................................................................................... 3

7. Checkout for System Start-up................................................................................................... 3

SECTION III OPERATION AND SERVICE

For The Maintenance Engineer

1. Introduction and Principle of Operation ................................................................................... 4

2. General Description ................................................................................................................... 4

3. Initial Start-up............................................................................................................................. 4

4. Routine Maintenance ................................................................................................................. 5

5. Periodic Maintenance ................................................................................................................ 5

6. Trouble Shooting ....................................................................................................................... 6

7. Spare Parts ................................................................................................................................. 7

8. Troubleshooting Reference Chart............................................................................................. 8

9. Page 9 through 11 ....................................................................................................NOT USED

SECTION IV REFERENCE

Illustrations and Drawings

Figure 1 General Component Arrangement...................................................... 12

Figure 2 High Voltage Lead Terminal Connections ......................................... 13

Figure 3 Typical Outdoor Installation................................................................ 14

Figure 4 Model 75 Junction Box… .................................................................... 15

Figure 5 Unit Outline .......................................................................................... 16

Figure 6 ATS Control Outline (STANDARD) ...................................................... I7

Figure 7 ATS PWM Remote Box (OPTIONAL) .................................................. 18

Figure 8 AIR BOSS CONTROL (OPTIONAL) ..................................................... 19

Figure 9 Not Used............................................................................................... 20

Figure 10 Not Used............................................................................................... 21

Figure 11 ATS Control (Standard)– Schematic .................................................. 22

Figure 12 ATS Control (Standard)– Field Wiring/ Sequence of Operations ..... 23

Figure 13 ATS Remote (optional)– Schematic.................................................... 24

Figure 14 ATS Remote (optional)– Field Wiring ................................................. 25

Figure 15 Air Boss Control (optional) – Schematic............................................ 26

Figure 16 Air Boss Control (optional) – Schematic/Field Wiring ...................... 27

Figure 17 Air Boss Control (optional)– Sequence of Operations...................... 28

SECTION I DESIGN

FOR THE SYSTEM DESIGN ENGINEER

1. General Description

The standard major components supplied with each unit
for installation are as follows:

electronic air cleaner
controller / power supplies

If space prohibits, turning vanes, air baffles or other
means may be utilized. Ducting – where attached to the
cabinet collars – should be gasketed, caulked or
otherwise made watertight.

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.

The electronic air cleaner contains the ionizing­collecting cells (collecting elements) and metal mesh
pre-filters and after-filters. Perforated plate or
impingement type mist suppressors, in lieu of the metal
pre-filters, are options when specified.

Gasketed access doors located on one end of the
cabinet, 90 degrees to the direction of the airflow,
provide entry for removal of the cells and filters. The
location of the access doors may be specified as “right”
or “left” handed. The hand designation is determined by
standing in the ductwork on the air entering side of the
unit so the airflow strikes your back.

The Pulse Width Modulated (PWM) power supplies,
providing the necessary high voltage for the air cleaner
and the controls 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.

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, can cause possible failures in
the unit and will void any and all warranties on our
equipment.

2. System Design and 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. The metal mesh filters, perforated plate or
mist suppressors; provide some resistance to effect
even air distribution. 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.

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 non­particulate 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.

Drain lines from the cabinet drain basin should be
trapped or otherwise sealed against the system
pressure (in accordance with local codes). Each
installation varies according to needs, but normally the
controller is located near the air cleaner. Ideal mounting
height is at eye level for ease in reading the
instrumentation, and to facilitate service.

For ease in maintenance and component removal,
adequate space, 39” Minimum Required, must be
provided in front of all access doors, motors, pump and
accessory equipment. Special consideration should be
given in this respect for installations where the unit is
suspended overhead. Catwalks or platforms should be
provided.

CAUTION
In addition to the above space requirement,
installation of the Model 75 in NFPA applications
shall have a clearance of at least 18"”to a
combustible material, 3" to limited combustible
material, and 0” to noncombustible material. Any
reduction in clearance or exceptions must be in
compliance with NFPA and acceptable to the
Authority Having Jurisdiction.

1

****WARNING****

Fire Suppression Systems
Extreme caution should be exercised when this unit
is installed in applications that are collecting
volatile or potentially flammable contaminates such
as cooking grease and petroleum based oils.
Trion strongly recommends a fire suppression
system be installed in the ductwork and on the
Model 75 in cases where these contaminates are
collected on the cell plates and collect on the
attached ductwork.
Contact the factory for questions or concerns
regarding a fire suppression system.

3. Outdoor Installations

Requirements for outdoor protection vary in accordance
to climate and equipment component arrangement for
the particular job. The best approach, for equipment
protection, is the construction of a heated shed or
building over the installation. As an alternative, the
installing contractor should treat the equipment as
required to meet the specific needs. Detailed
discussions of the Model 75 components are as follows,
using a rooftop installation as an example (refer to
Figure 3):

Preferably, straight down from the drain pan supply
through the floor. The normally recommended drain line
trap, to seal off the cabinet from the drain against the
system pressure, should be located in the heated
interior. If not installed in this manner, heat wrap or
other means should be employed to prevent freezing.
Clean-outs are recommended to be installed in all drain
lines.

SECTION II INSTALLATION

FOR THE INSTALLING CONTRACTOR

1. Unpack and Inspect

At the time the unit is received, all shipping containers
and their contents should be examined for damage. Any
damage occurring in shipment must be immediately
reported to the carrier, an inspection report completed
and a claim filed at the receiving point.

The unit cabinet is shipped completely assembled and,
where size permits, the ionizing-collecting cells are
shipped inside the cabinet. On large units, the upper tier
of cells may be shipped in separate containers. The
controller, and other separate accessories are shipped
in the containers as noted on the packing list.

Adjoining Duct Work (not supplied by Trion)
The ductwork located on the air entering side of the
cabinet, between the point where it enters the roof and
the cabinet, must be air tight to prevent the entrance of
moisture, especially if it is under negative pressure. It
must also be adequately insulated or other means taken
to prevent the formation of condensation through
temperature change. Condensation will short out the
ionizing-collecting cells. Insulation must be of the
outdoor variety.

Trion Model 75 Cabinet
The access doors on the Model 75 cabinet are gasketed
and the unit is basically sealed against air leakage. The
paint finish (epoxy) is for interior and exterior use. Like
the air-entering duct, the cabinet must be insulated or
other means taken to prevent condensation from taking
place, which results in electrical shorting of the ionizing­collecting cells. Insulation, when employed must be
suitable for outdoor applications and when applied,
consideration given to all access door openings and
electrical interlock box covers.

Controller/PWM Power Supplies
As the controller/power supplies are designed for
remote mounting, they can be, in many cases, located
indoors and still be reasonably close to the main
cabinet. If located outdoors with the cabinet, it must be
weather protected.

Drain Line
The drain line, located under the ionizing/collecting cell
access door at the lowest point of the Trion cabinet
drain pan, should be piped with as short a run as
possible to the heated interior of the building.

2. Position Air Cleaner Cabinet

To reduce weight for ease in handling, remove the pre­filters, after-filters and the ionizing-collecting cells from
the cabinet, and place them safely aside. Position the
cabinet in the designated location giving consideration
to the following points:

(a) Provide sufficient clearance in front of the access

doors for ionizing-collecting cell and mechanical
filter removal. A minimum of 39 inches is

required. (see figure 5)

(b) Level the cabinet to assure proper drainage from

the drain pan.

(c) Unless specific design features have been

prearranged, the direction of airflow through the
cabinet may be either from the right or the left.
When the ionizing-collecting cells are reinstalled,
the directional arrows on the cell end plates must
concur with airflow through the cabinet. If mist
suppressors have been specified, they are to be
installed on the air entering side of the unit.

After the cabinet has been properly located, it may be
secured into place at the predrilled factory mounting
pads either by bolting or welding.

3. Connect Adjoining Duct Work

Depending on the application, the installation plan may
or may not call for adjoining ductwork on the air entering
and/or air leaving sides of the cabinet.

When adjoining ducting is to be installed, the bottom of
the horizontal duct runs should be relatively flat and

2

sloped toward the cabinet drain pan for an 18-inch
length.

Duct securement to the collar may be completed using
the predrilled flange. The seam should be made air and
watertight by caulking or gasketing.

When a blower is installed downstream from the Trion
cabinet, the ducting between the cabinet and the blower
will be under negative pressure and should be made air
tight to prevent infiltration of contaminated air.

After the ductwork has been installed, clear remaining
material or debris from inside ducts and bottom of
cabinet, and then re-install both the mechanical filters
and the ionizing-collecting cells.

NOTE: Follow the directional arrows located on the cell
end plates. The side of each cell containing the spiked
ionizer blades must be located on the air entering side
of the cabinet. The brass contact plungers on the cell
should be inserted toward the back of cabinet. Also,
mist suppressors when specified must be located on the
air entering side of the cabinet.

4. Connect Drain

Connect a drain line to the pipe coupling provided in the
cabinet drain basin in accordance with the governing
plumbing codes. The drain line must be sealed with a
trap or other means to prevent air by pass. If a trap is
used, it should hold sufficient water column to overcome
the system air pressure and to assure that loss of liquid
from evaporation between cleaning periods will not
break the seal. The drain line should not be smaller than
the drainpipe coupling.

one Red for the collector, are factory furnished.
Each lead is to be run in separate conduit and
must be of continuous run (do not splice) between
the controller and the ionizing-collecting cell
terminal connection in the junction box.

(b). Primary Wiring

The Controller is the main distribution point for all
primary wiring. The various electrical components
involved are connected to and powered from the
controller. These interlocks are safety switches that
prevent access to the charged high voltage
components without first turning “OFF” the high
voltage by interrupting the 24 VDC input to the PLC.
Refer to the appropriate Field Wiring Diagram.

(c). Grounding

An earth ground must be provided to the Model
75 cabinet and control. All ground connections
must be in contact with bare metal and securely
affixed. Ground conductor size and connection
means will be in accordance with all applicable
electrical code standards.

7. Check Out for System Start-up

When the installation has been completed, assure that
the equipment is ready for start-up by checking the
following:

A. All construction debris is removed from the ionizing-

collecting cells, drain basin and ductwork.

B. The drain line from the Trion drain basin is clear and

completely connected to its point of termination.

C. Supply line power is available and electrical wiring

is completed to the following components:

5. Mount Controller

The Controller should be mounted at eye level and
located as close to the air cleaner as practical. It must
be mounted indoors out of the weather unless supplied
with a weatherproof cabinet. Allow sufficient space in
front of the access door(s) for service. Refer to
appropriate Control/Remote PWM Box Outline Drawing
for mounting hole layout and dimensions.

6. Complete Wiring

(a). High Voltage Wiring

WARNING:
EXERCISE ALL THE NORMAL PRECAUTIONS
WHEN WORKING WITH HIGH VOLTAGE AND
COMPLY WITH NEC AND ALL APPROPRIATE
LOCAL CODES.

The high voltage wiring entails interconnecting the
power supply(s) to the ionizing-collecting cell(s)
through the factory-installed junction box on top of
the cabinet. All the wiring in the cabinet has been
completed at the factory.

Refer to the Field Wiring Diagram. Two high
voltage leads, Red/Black Tracer for the ionizer and

1. Controller

2. Electrical Interlocks

3. Ionizing-Collecting Cells

4. The System Fan

SECTION III OPERATION & SERVICE

WARNING

RISK OF ELECTRIC SHOCK
These serving instructions are for use by qualified
personnel only. To reduce the risk of electric shock,
do not perform any servicing other than that
contained in the operating instructions unless you
are qualified to do so.

FOR THE MAINTENANCE ENGINEER

1. Introduction and Principle of Operation

The Trion electronic air cleaner is technically known
as an electrostatic precipitator. In this type of
equipment, all airborne particles, even of microscopic

3

size, are electrically charged (positively) as they pass
through a high voltage ionizer. These charged particles
are then attracted and adhere to a series of parallel
collecting plates, which form the negative elements of
an electrostatic field.

are required for the ionizer sections and 6.5 KVDC for
the collector sections of the cells.

3. Initial Start-up

The ionizer consists of charged stainless steel spiked
blades spaced between grounded electrodes. The
collecting section consists of parallel plates arranged so
that each alternate plate is charged while the
intermediate plates are electrically grounded.

Periodically, depending on the type and concentration of
contamination in the air, contaminate is washed from
the plates by manually removing the cells and washing
with a pressure washer.

Two major functional components comprise the air
cleaner:

(1) Ionizing-collecting cells to ionize and collect

airborne particulate matter.

(2) Power supply(s) to supply high voltage direct

current to the ionizing-collecting cells.

Normally, systems are designed for collection
efficiencies in the range of 90 percent or more.
Collecting a contaminate at these efficiencies,
especially when there are high concentrations can result
in large accumulations in a relatively short period.
Therefore, maintenance must encompass two areas;
the operation of the equipment for efficient collection
and the systematic removal of the collected
contaminate.

A. Inspect the inside of the adjoining ductwork and

Trion cabinet to be sure it is clean and free of any
debris or construction materials. Especially note the
opening in the drain basin for any restrictions. The
ducting, where secured to the cabinet collars,
should be sealed water tight either with gasketing or
caulking.

B. Inspect the ionizing-collecting cells to see that all of

the ionizing blades are intact, that no large pieces of
foreign material are lodged between the plates, and
that the cells are properly installed in the cabinet
with the spiked ionizing blades located on the air
entering side.

C. Check the high voltage leads to see that they are

connected to the proper terminal both at the
ionizing-collecting cells, the junction box and inside
the controller. (Refer to Figures 2 and 4).

D. Be sure that the drain lines from the Trion cabinet

drain basin are completely connected and properly
terminated. A trap or seal of some type should be
incorporated in the line to prevent air bypass.

E. Be sure that electrical power is available, that the

wiring is completed, and that the system blower is
ready to energize.

2. General Description

The ionizing-collecting cells (contaminate collecting
elements) are housed in the cabinet on slide rails. They
can be removed from the cabinet as required, through
the end access door, by sliding them out like drawers.
On multi-cell units, all of the electrical connections
between cells in a given tier are automatically made
through spring plunger connectors. On the access end,
the high voltage cables from the power supplies are
connected to the junction box on top of the cabinet. The
high voltage cables from the junction box to the
individual tiers are factory wired. When installing cells
into the cabinet, observe the directional arrows on the
cell end plates. The side of the cell containing the
spiked ionizer blades always must be located on the air
entering side. The spring plunger connectors, located
on one end of each cell, will always face toward the
back of the Model 75 Cabinet.

Both the air entering and air leaving side of the cabinet
contain either metal mesh filters or perforated plate,
whichever was specified. These items act as trash
screens, and provide resistance for even air distribution.

The Power Supply(s) convert the 115 volt, 60HZ, single
phase AC supply to the high voltage DC needed to
power the ionizing-collecting cells. Potential of 13 KVDC

F. Be sure that all access door interlocks are closed.

G. Close the system electrical supply switches, making

power available to the Trion controller and the
system fan.

H. Turn the controller selector switch to the “ON”

position. The blower should run (if installed) and the
power supply(s) should be energized. Electrical
arcing within the ionizing-collecting cells may occur.
It is a normal occurrence caused by accumulation of
dusts from construction or other sources in the
cell(s) and should subside quickly. If the arcing is
continuous and does not subside, recheck the
routing of the high voltage leads between the power
supply(s) and the cell(s). Refer to the field wiring
diagram. The ionizer lead must be connected to the
ionizer and the collector lead to the collector.

Kitchen Exhaust Applications

I. For safe and proper operation adhere to the following
instructions and procedures:

1. Exhaust systems shall be operated during all
periods of cooking in restaurant applications.

4

2. Filter-equipped exhaust systems shall not be
operated with filters removed.

3.The posted instructions for manually operating the
fire extinguishing system shall be kept conspicuously
posted in the kitchen and reviewed periodically with
employees by the management.

4. Listed exhaust hoods shall be operated in
accordance with the terms of their listings and the
manufacture instructions.

5. Cooking equipment shall not be operated while its
fire-extinguishing system or exhaust system is not
operating or otherwise impaired.

4. Routine Maintenance

A. Washing Frequency

The frequency that the collected dirt is to be washed
from the unit depends upon the type and amount of
dirt in the air to be cleaned. Dirt which is greasy in
nature tends to harden after collection and should
be washed away often. Likewise, units operating
under extremely heavy dirt loads should be washed
more often as a large build-up of collected material
will have a tendency to “blow-off” if permitted to
remain on the collecting elements for long periods
of time. In that the type and amount of dirt varies
geographically (and from one location to another in
any given area) it is recommended to start operation
with a washing frequency of at least once a week.
This schedule may then be altered as needed after
visual examinations of the collected material
contained on the ionizing-collecting cells. Daily
washing is not unusual for units operating on heavy
welding fume, kitchen exhaust hoods or similar
contaminants.

B. Detergent

Effective washing is dependent upon detergent. The
detergent, as supplied by Trion, Inc., is formulated
specifically for electronic air cleaners. If substitutes
are used, they must be approved by Trion, so as to
not void the warranty and should be safe for use in
ventilation systems and non-caustic, as 95% of the
ionizing-collecting cells are constructed of aluminum
and special high voltage insulation and gasket
seals.

C. Electrical Operation

The Air Boss controller (Optional) contains a digital
LED display for kilovolt and milliampere readings.
The milliammeter should be observed on a routine
basis to be sure that it is reading within the
prescribed operating range as marked on the data
plate. For those units containing a voltmeter, the
ionizer readings should be between 12.5 and 13.5
KV.

The ATS controller and remote PWM box both have
LED indicating lights to show power to the PWM
power supplies. Flickering or failed LED’s indicate
electrical arcing and/or power failure.

5. Periodic Maintenance

A. Fire Suppression System (IF INSTALLED) –

Every 6 Months

Properly trained and qualified personnel shall
complete inspection, cleaning and servicing of the
fire suppression system.

All actuation components, including remote manual
pull stations, mechanical or electrical devices,
detectors, fire-actuated dampers, etc., shall be
checked for proper operation in accordance with the
manufacturers listed procedures. In addition to
these requirements, the specific inspection
requirements of the applicable NFPA standard shall
also be followed. If required, certificates of
inspection and maintenance shall be forwarded to
the authority having jurisdiction.

B. Controller - Every 12 Months

The inside of the controller cabinet should be
examined for accumulated dirt and dust. If required,
the components should be cleaned using a good
brand of electrical contact cleaner. All terminal
connections should be checked for securement and
tightened or reworked as required.

C. Ionizing-Collecting Cell – Every 6 to 12 Months

Remove and inspect the ionizing-collecting cells for
excessive dirt accumulations. Manually clean as
required in a soak tank, commercial car wash, or
with a pressure hose or pressure cleaner using a
low pressure setting. At this time, particular care
should be taken in cleaning each of the insulators.

WARNING:

DO NOT USE HIGH PRESSURE STEAM CLEANING
EQUIPMENT TO CLEAN CELLS. THE EXCESSIVE
HEAT AND PRESSURE WILL CAUSE THE PLATES
TO WARP AND IN TURN POSSIBLY CAUSE
EXCESSIVE ARCING.

D. Filter Devices – Every 4 to 6 Months

Hoods, impingers, metal mesh filters, ducts and
other appurtenances shall be cleaned to bare metal
at frequent intervals prior to surfaces becoming
heavily contaminated with grease, oil or other
contaminate. It may be advantageous to clean
readily removable items, such as impingers, metal
mesh filters or other permanent filter devices in a
soak tank, with a pressure hose or pressure cleaner
set low. After cleaning to bare metal, components
shall not be coated with powder or other substance.

5

When a cleaning service is used, a certificate
showing dates of inspection and/or cleaning shall be
maintained on the premises.

WARNING
Flammable solvents or other flammable
cleaning aids shall not be used.

power supply and the ionizing-collecting cell(s) they
energize. The quantity of power supplies per unit is
dependent upon unit size with one or two power
supplies for each ionizing-collecting cell tier in height.
Other than the basic hand tools, it is advantageous to
have a volt meter with a 20 KVDC high voltage probe.
These instruments are standard catalog items by
several manufactures.

At the start of the cleaning process, electrical
switches that could be accidentally activated shall
be locked out. Components of the fire suppression
system (if installed) shall not be rendered
inoperable during the cleaning process.

Care should be taken not to apply cleaning
chemicals on any fusible links or other detection
devices of the automatic extinguishing system.

6. Troubleshooting

WARNING:
EXERCISE THE USUAL PRECAUTIONS WHEN WORKING
WITH HIGH VOLTAGE. THE MAXIMUM OPERATING
OUTPUT FROM THE POWER SUPPLY IS 15,000 VDC AND

5.5 MA. to 11.0 MA. WHEN IN PARALLEL.

IF SAFETY SWITCHES ARE CLOSED AND CIRCUIT IS
ENERGIZED, DO NOT TOUCH HIGH VOLTAGE. WHEN
THE CIRCUIT IS DE-ENERGIZED, ALWAYS BLEED OFF
REMAINING STATIC CHARGE WITH AN INSULATED
HANDLED SCREW DRIVER BY SHORTING

GROUND

THE POINTS OF HIGH VOLTAGE DC POTENTIAL.

WARNING

Risk of Electrical Shock

The servicing Instructions are for use by qualified
personnel only. To reduce the risk of electric shock, do
not perform any servicing other than that contained in
the service instructions unless you are qualified to do
so.

A. Introduction

This section on trouble shooting provides a description
of potential malfunctions, their cause, location and
correction. A Trouble Reference Chart listing the most
probable causes and corrections follows the general
text.

NOTE: All repair to the fire suppression system (If
Supplied) must be completed by the authorized fire control
contractor.

B. Secondary Short Circuit

The most common outage is a short in the secondary
circuit and is best located through the process of
elimination. Symptoms are a flickering indicating light
accompanied by an arcing noise in the
ionizing-collecting cell(s) or an indicating light that is
not glowing.

A flickering light with an arcing noise is an indication of
a high resistance short circuit and a light that is not
glowing is an indication of a dead short. (A light that is
not glowing can also be an indication of an open circuit
in the primary circuit. Refer to the paragraph on open
circuits.) The short may be in the power supply, the
high voltage cables or the ionizing-collecting cell(s). To
isolate the short to any one of these three
components, proceed as follows:

WARNING

When safety interlock switches are closed, do not
come in contact with high voltage components. The
operating output from the high voltage power
supply(s) is 12,600 VDC and 6 MA. to 11.0 MA.

When the power supply(s) is de-energized there is a
20 second delay for the voltage to decay. Always
short from ground to a point of high voltage with a
well insulated jumper wire or an insulated handled
screwdriver to bleed-off any remaining residual
charge.

1. Disconnect both high voltage leads from their
respective terminals in the power supply and support
them away from any point of contact.

2. Energize the power supply:

a. If the light still flickers or does not glow, the trouble
is indicated to be in the power supply. Replace the
power supply in its entirety.

b. If the light glows steady with the leads disconnected
the power supply is indicated to be normal.

The electronic air cleaner is the unit within the system
that has the highest efficiency collection rating and is
also the one with the highest potential for malfunction.
When a malfunction does occur, the outage is usually
found in the electrical secondary circuit in the
ionizing-collecting cell(s).

Indicating lights are installed in the face panel of the
control to monitor the electrical operation of each

NOTE: It will be necessary to close the access door
electrical interlock switch operated by the access door
and affix the junction box lid with hardware supplied to
close the electrical interlock switch on the box, to
complete the primary circuit to the power supply.

3.Next reconnect both high voltage leads to their

respective terminals inside the power supply and
disconnect them at the ionizing-collecting cell(s). Support

6