Carrier Airaaxcc20a Owners Manual

							AIRA
Electronic Air Cleaner
Installation, Start-Up, and Operating Instructions
NOTE:Read the entire instruction manual before starting the
installation.
TABLE OF CONTENTS
Page
SAFETY CONSIDERATIONS...................................................1
INTRODUCTION.....................................................................1-2
PLANNING AN INSTALLATION........................................2-3
· Application...................................................................................2
· Installation Requirements ............................................................2
· Air Conditioning..........................................................................2
· Humidifiers ..................................................................................3
· Outdoor Air .................................................................................3
· Sheet Metal Installation...............................................................3
· Transitions ................................................................................3-4
· Turning Vanes ..........................................................................3-4
· Select Location .........................................................................3-4
· Direction of Airflow Through Air Cleaner ................................3
INSTALLATION......................................................................3-7
· Orientation ...............................................................................3, 5
· Details ..........................................................................................5
· Typical Mounting Positions ........................................................5
· Electrical Installation ..............................................................5, 7
· Furnace Application ....................................................................7
· Fan Coil Application ...................................................................7
SYSTEM CHECKOUT............................................................7-8
MAINTENANCE..........................................................................8
· Washing Cells and Prefilters.......................................................8
TROUBLESHOOTING.........................................................8-11
· Recommended Service Tools ..................................................8-9
· Indication of Electrical Trouble ..................................................9
· Electrical Troubles and Their Conditions .............................9-11
ADDITIONAL CHECKOUT PROCEDURES.......................11
OTHER FACTS YOU SHOULD KNOW.........................11-15
· White Dust .................................................................................11
· Ozone....................................................................................11-12
· High Altitude Operation ................................................12-13, 15
· Airflow Sensor (optional) ....................................................12-13
SAFETY CONSIDERATIONS
Improper installation, adjustment, alteration, service, maintenance,
or use can cause explosion, fire, electrical shock or other condi-
tions which may cause personal injury or property damage.
Consult a qualified installer, service agency, or your distributor or
branch for information or assistance. The qualified installer or
agency must use factory authorized kits or accessories when
modifying this product. Refer to the individual instructions pack-
aged with the kits or accessories when installing.
Follow all safety codes. Wear safety glasses and work gloves. Use
quenching cloth for brazing operations. Have fire extinguisher
available. Read these instructions thoroughly and follow all
warning or cautions attached to the unit. Consult local building
codes and National Electrical Code (NEC) for special require-
ments.It is important to recognize safety information. This is the
safety-alert symbol
. When you see this symbol on the unit and
in instructions or manuals, be alert to the potential for personal
injury.
Understand the signal words DANGER, WARNING, and CAU-
TION. These words are used with the safety-alert symbol. DAN-
GER identifies the most serious hazards whichwillresult in severe
personal injury or death. WARNING signifies hazards which
couldresult in personal injury or death. CAUTION is used to
identify unsafe practices whichwouldresult in personal injury or
product and property damage.
INTRODUCTION
The AIRA is a duct mounted electronic air cleaner available in
1400 and 2000 CFM models. (See Fig. 1.)
Designed to remove airborne particles down to 0.01 microns in
size, the AIRA effectively removes such particles as dust, dirt,
smoke, pollen, virus, spores, bacteria, and mold from indoor air.
Air movement through unit is provided by heating, air condition-
ing, or ventilating system blower. As dirty air enters air cleaner, air
passes through a metal mesh prefilter. (See Fig. 2.) Prefilters
prevents lint, pet hair, and other large particles from entering air
cleaner by impingement. It is important that these filters be in
place to prevent excessive dirt loading of air cleaner collector cells.
These filters extend time between maintenance of air cleaner
collector cells. This allows the collector cells to provide clean air
for a longer period between washing.
Fig. 1ÐAIRA Electronic Air Cleaner
A97152
®
Visit www.carrier.com
Manufacturer reserves the right to discontinue, or change at any time, specifications or designs without notice and without incurring obligations.
Book 1 4
Tab 7a 9a
PC 101 Catalog No. 03AI-RA0 Printed in U.S.A. Form AIRA-1SI Pg 1 6-97 Replaces: New 
						

							Prefiltered air then passes through a 2-stage electric cleaner. In the
first stage, all airborne particles, even submicron size, are electri-
cally charged (positive) as they pass through the ionizer. The
ionizer field is setup by a corona discharge emanating from fine,
tightly strung wires suspended between 2 adjacent flat plates. In
the second stage, charged particles pass into an intense electrical
field established between alternately charged and grounded paral-
lel plates. Here positively charged particles are attracted to ground
plates and are deposited out of the air stream.
Air Cleaner Construction
The air cleaner is easy to install, operate, and maintain. Its basic
components are:
1. CABINET Ð mounts to existing ductwork; houses the col-
lecting cells and prefilters.
2. COLLECTING CELLS Ð collect dust, dirt, and other par-
ticles in the air. They contain ionizing and collecting sections
as described above. Cells must be installed with ionizing wires
on air intake side. A spring contact is located on top of each
cell and must be in position to make contact with contact
board assemblies on bottom of power supply. (See Fig. 3.)
3. PREFILTERS Ð trap large particles before they enter collec-
tor cells.
4. POWER SUPPLY ASSEMBLY Ð contains indicating lights,
solid state power supply, contact boards, and electrical con-
trols including ON/OFF switch and safety interlock switch. It
also includes a wiring compartment located at rear of the
power supply assembly.
PLANNING AN INSTALLATION
Step 1ÐApplication
This air cleaner is intended to be used in return-air duct of a forced
air heating, cooling, and ventilating system.The air cleaner should be installed in system so that all system air
is circulated through the air cleaner. The air cleaner will only
remove airborne contaminants delivered to it. Maximum perfor-
mance is obtained when system blower is set for continuous
operation.
Never use air cleaner to collect grease or other flammable
contaminants.
Step 2ÐInstallation Requirements
The required location for the air cleaner is in the return-air next to
the blower compartment. In this location, the blower motor and
cooling coils will be kept clean.
Do not install the air cleaner in the discharge duct.
Before installing the air cleaner consider the application. (See Fig.
9 to 14.) If a transition is required refer to section entitled
Transitions. The unit must be readily accessible for periodic
inspection and cleaning of prefilters and electronic cells to
maintain maximum efficiency and trouble-free operation.
Step 3ÐAir Conditioning
The air cleaner should be installed upstream of cooling coil. This
will keep coil clean and reduce air conditioning coil maintenance.
Improved cooling efficiency is the result which directly affects
energy costs. If air cleaner is downstream of cooling coil,
condensation will form on cooled collector plates when air
conditioner cycles. This will allow water droplets to form on
collector plates and cause nuisance arcing. Arcing will reduce air
cleaner efficiency and reduce life of high-voltage power supply.
Table 1ÐComponent Information
MODEL AIRAAXCC0014 AIRAAXCC0020
Electrical Input120v, 60 Hz, single
phase120v, 60 Hz, single
phase
DimensionsHXWX
D20-1/2 X 7-1/4 X 25 24-1/2 x 7-1/4 x 25
Air Flow Range*350 Ð 1400 CFM *600 Ð 2000 CFM
Max Pressure Drop0.11-in. wg @ 1400
CFM0.14-in. wg @ 2000
CFM
Cell Weight10 lb each 12 lb each
Unit Weight41 lb 46 lb
Power Consumption40 watts maximum 48 watts maximum
Electrical Output2.5 MA @ 6200 VDC 3.2 MA @ 6200 VDC
*Using electronic air cleaner outside specified airflow range is not recommended.
Fig. 2ÐAirflow through Unit
A97055
1. PRE- FILTER
2. IONIZER
3. COLLECTOR
4. OPTIONAL CHARCOAL
AFTER-FILTER
2 
						

							Step 4ÐHumidifiers
An evaporative humidifier can be mounted upstream of air cleaner.
It is best to install atomizing humidifier downstream of air cleaner
because hard water salt deposits and water droplets may damage
air cleaner. If an atomizing humidifier must be mounted upstream
of air cleaner:
1. Mount it as far upstream as possible. (Recommend at least 6
ft.)
2. Install standard disposable furnace filter between humidifier
and air cleaner to trap water droplets and hard water salts.
Select location that is accessible for inspection and replace-
ment.
3. Clean air cleaner more frequently to prevent hard water salt
buildup.
Step 5ÐOutdoor Air
When outdoor air is added to return air duct, sufficient heat should
be added to maintain return air temperature at 40ÉF (4ÉC)
minimum. Lower temperatures can cause ionizer wire failure.
Step 6ÐSheet Metal Installation
The electronic air cleaner is adaptable to all new and existing
residential forced-air furnace and cooling systems.
Step 7ÐTransitions
If air duct does not fit air cleaner cabinet opening, gradual
transitions are recommended to reduce air turbulence through air
cleaner and maximize efficiency. Not more than 20É (about 4 in.
per running ft) of expansion should be used on each side of
transition fitting. (See Fig. 4.)
Step 8ÐTurning Vanes
If air cleaner is installed adjacent to a 90É duct elbow, add turning
vanes inside duct to improve air distribution across face of air
cleaner. (See Fig. 5.)
Step 9ÐSelect Location
Remember to select a location that is readily accessible for
periodic inspection and cleaning. Allow a minimum of 18-in.
clearance in front of access panel and 12-in. clearance above
power rack cover plate for component removal and service space.
For complete dimensions required refer to Fig. 6.Step 10ÐDirection of Airflow Through Air Cleaner
NOTE:Air cleaner is set up for left-to-right airflow when facing
access door. For right-to-left airflow remove prefilters and cells
from cabinet.
1. A plastic positioning spacer is located inside bottom of cabinet
and secured to cabinet using No. 6-32 round head Phillips
drive thread cutting screw (See Fig. 7.) to index installation of
cells in proper position with respect to airflow.
2. Remove screw and reposition spacer in alternate hole at
bottom of cabinet.
3. Replace screw to insure plastic spacer is not accidentally
knocked out of place during normal maintenance. It must be
installed in hole provided closest to air leaving side of cabinet.
4. Seal unused hole with duct tape.
5. Turn cells around, replace in cabinet, and replace prefilters on
air entering side.Directional arrows on cell end plates must
point in direction of airflow.
Only a trained, experienced service person should install this
electronic air cleaner. The power supply should be removed
before installation. To remove the power supply, remove the
2 screws (See Fig. 8.) in the top front of the cabinet.
Remember to keep this hardware for reinstallation of the
power supply when the air cleaner installation is complete. A
thorough check of the unit installation should be completed
before unit operation.
INSTALLATION
Step 1ÐOrientation
Air cleaner can be in any position, except with access door facing
down. See Fig. 9-14 for proper air cleaner mounting with variety
of furnace installations.
Fig. 3ÐView of Major Components
A97056
CABINET
COLLECTING CELLSPRE-FILTER POWER
SUPPLY
ASSEMBLY
ON-OFF
SWITCH
CONTACT
INDICATING LIGHTS
ACCESS DOOR
3 
						

							Fig. 4ÐTransition Fitting Installation
A97057
AIR
CLEANER
OPENING
MAXIMUM 4 DROP
PER LINEAL FOOT
FURNACE
OPENING AIR FLOW
FURNACE
AIR CLEANER AIR FLOW20¡
TRANSITION SECTION
Fig. 5ÐTurning Vanes Installation
A97058
TURNING VANES 
Fig. 6ÐDimensional DrawingDimensions (In.)
MODELABCDEF
AIRAAXCC001420-1/2 13-7/8 16-1/4 22-1/2 25 7-1/4
AIRAAXCC002024-1/2 17-7/8 20-1/4 22-1/2 25 7-1/4
A97059
4 1⁄2²20 3⁄4²
A
F
E
C 3 
1⁄2²
2 
3⁄8² 2 
1⁄8² 30¡
5⁄8²
3⁄16²
B
D
4 
						

							Cabinets will support a maximum weight of 400 lb when
installed beneath a vertical furnace or air-handling unit. When
setting furnace on cabinet, do not drop it into place. Position
furnace correctly on cabinet to prevent a corner from slipping
down and damaging cabinet.
Prior to installing this product:
1. Read rules and instructions carefully for safe operation.
Failure to follow them could damage product or cause
hazardous condition.
2. Check ratings given on product to make sure it is suitable for
your application.
Step 2ÐDetails
1. Remove existing furnace filter and discard.
2. Air cleaner cannot remove existing dirt from blower and
ducts. Clean area thoroughly before you begin.
3. Remove unit access panel, and slide prefilters and ionizing-
collecting cells out of cabinet. Place them safely aside with
warranty registration card. Remove any cardboard pieces
before proceeding.
NOTE:The following is a typical installation of an air cleaner on
an upflow furnace. (See Fig. 8 and 11.) You may have to alter the
installation to fit your application.
4. Locate cabinet in cold air return duct so that all of return air
flows through unit. (See Fig. 8.) If furnace and air cleaner
openings are different, use a transition. (See Fig. 4.)
5. Mounting holes are provided for duct work attachment. (See
Fig. 8.) The 0.140-in. holes are sized for No. 8 sheet metal
screws, or 1/8-in. rivets. If adjoining ductwork is flanged,
install screws so that screw heads are inside cabinet. This willprevent damage to prefilters and optional charcoal after-filter
during removal and installation after cleaning.
6. After unit has been secured, seal seams air tight with duct tape
or caulking.
In applications with minimum airflow, it is helpful to seal any
openings on power pack assembly or cabinet.
7. Refer to Direction of Airflow.
8. Re-install power supply on top of cabinet.
9. Install prefilters and ionizer-collector cells.
10. Re-install cabinet front panel door assembly.
Step 3ÐTypical Mounting Positions
Air cleaner can be mounted in any position, except with the access
door facing down.
Seal all joints in return air system with duct tape between furnace
and air cleaner to prevent dust from entering clean airstream and to
assure proper operation of electronic airflow sensor.
Step 4ÐElectrical Installation
All wiring must comply with applicable local and national codes.
Be sure all incoming power is OFF before beginning any
procedures.
The following instructions are for use by qualified personnel
only.
Fig. 7ÐPlastic Positioning Spacer and Screw for
Right-to-Left Airflow Installation
A97060
SCREW
SPACER
(PLASTIC)
Fig. 8ÐInstallation on Upflow Furnace
A97061
MOUNTING HOLESSCREW(S)
BLOWER
COMPARTMENT
5 
						

							Fig. 11ÐSide Installation on Upflow Furnace
Side installation. Cleaner is mounted vertically, where return air
enters side inlet of furnace.
A97064
AIR
FLOW
Fig. 9ÐBasement Furnace
Mounted horizontally in return plenum just above furnace.
A97062
AIR FLOW
Fig. 12ÐOffset Installation
If there is less than 7-in. for mounting air cleaner between duct and
furnace, move return-air drop.
A97065
AIR
FLOW
Fig. 10ÐDownflow Furnace
Mounted horizontally in return duct or plenum just above furnace.
A97063
AIR FLOW
6 
						

							The following procedures will expose electrical components.
Disconnect power between checks and proceed carefully.
Electrical shock can cause injury or death.
The air cleaner is powered by providing 120v, 60 Hz, 1-phase
electrical service to pigtail leads at field wiring compartment (with
knock-out holes) located at rear of power pack assembly. (See Fig.
15.)
1. Turn air cleaner off using ON/OFF rocker switch located on
front panel.
2. Remove power supply cover plate by removing front door and
2 screws holding assembly to top of air cleaner. (See Fig. 8.)
3. Make wiring connections inside junction box area (field
wiring compartment). Remove knock-out and use conduit or
other approved methods to supply input power. Connect
ground wire to clip.
4. Replace power supply cover plate and secure with screws
removed from step 2.
5. Replace door on front of air cleaner.
6. Air cleaner will operate when door is in place, ON/OFF rocker
switch is in ON position, and input voltage is present in
junction box. The following should be completed to supply
input power to air cleaner.
Step 5ÐFurnace Application
It is recommended to use EAC-1 and EAC-2 terminals when
provided by furnace circuit board. These outputs will provide 120
VAC whenever blower motor is energized.Furnace circuit boards without EAC-1 and EAC-2 terminals must
use alternate methods to supply 120 VAC to air cleaner (via sail
switch, isolation relay, or optional electronic airflow sensor). Air
cleaner should only operate when blower motor is running.This unit cannot be powered directly from blower motor
leads. Voltages can exceed 190 VAC (120-v motors). This
can double with 240-v fan coil motor.
Step 6ÐFan Coil Application
If EAC-1 and EAC-2 terminals are provided by fan coil circuit
board, refer to fan coil data to determine voltage output. Most fan
coils do not provide 120v at these terminals. Alternate methods
may be needed to convert fan coil supply voltage to 120 VAC
input for air cleaner. A 240-VAC to 120-VAC step-down trans-
former (40 VA) will be needed in most application. Sail switch,
isolation relay, or optional electronic airflow sensor may also be
applied when needed.
Do not wire directly to multiple speed blower motor. Wiring
to multiple speed blower will damage power supply and void
warranty.
SYSTEM CHECKOUT
ADJUST THERMOSTAT SO THAT SYSTEM BLOWER IS
OFF. After installing unit, switch ON/OFF rocker switch to
ON position.A bright red segment of rocker switch should be
visible.
Adjust thermostat so system blower is ON.
Fig. 13ÐBotton Installation on Upflow Furnace
Installation beneath furnace. Cleaner mounts horizontally, where
return air enters from below. Raise furnace by installing suitable wood
structure and install air cleaner.
A97066
AIR FLOW
Fig. 14ÐHorizontal Furnace
Mounted vertically in return duct as close to furnace as
possible.
A97067
7 
						

							1. Both input indicating light (green) and output voltage light
(red) should now be on.
2. Check to assure that both lights go out when the cell access
panel is removed, when rocker switch is switched to OFF
position, and when system blower is not running.
MAINTENANCE
Sharp edges. Handle the cells carefully to avoid cuts from the
sharp metal edges.
Step 1ÐWashing Cells and Prefilters
Regular washing is necessary to insure proper performance. A
thorough washing every 2 months will be adequate for most
installations. More frequent washing (once a month) may be
necessary on some installations (new homes for example) where
there is new carpet, plaster dust, or there is above normal cigarette
smoke. (See Fig. 16.)
1. Remove cells and prefilters.
a. Push air cleaner ON/OFF rocker switch to OFF. Wait 15
sec. Open access door.
b. Carefully remove cells and prefilters, and set aside.
c. Avoid damage to cell plates and ionizing wires.
2. Wash in tub.
a. Place enough hot water in utility tub to cover cell.
Electronic Air Cleaner concentrate solution (Part No.
P902-2001) is recommended. (Solution is available from
your dealer through the Replacement Components Divi-
sion.) As an alternative, 2 to 4 oz of automatic dishwasher
detergent (not laundry detergent) can be used.
b. Allow cell to soak for 30 minutes. Agitate cell up and down
in solution until it appears clean, then remove.
c. Repeat with second cell.
d. Agitate prefilters up and down in solution until they appear
clean.e. With hose, rinse cells and prefilters. Hose should be held
about 10 in. from cell plates and at slight angle for better
cleaning results. Cell frame should be thoroughly rinsed
along edges to dislodge any trapped lint or dirt. Carefully
wipe damp cloth or sandpaper (not emery cloth) along
ionizing wires.
f. Stand cells and prefilters up to drain. Let dry 2 hr.
NOTE:We do not recommend washing electronic air cleaner
cells in the dishwasher.
Not only can collector plates and ionizing wires be easily dam-
aged, but dirt from cells and prefilters can permanently stain
plastic dishwasher linings.
3. Replace cell and prefilters.
a. Replace prefilters and cells in cabinet. Check that arrow on
cells points in same direction as air flows through duct. (If
you have to force it past the positioning screw on bottom,
it is probably in a wrong position.)
b. Reposition access door (engage tips on lower edge of door
into slots in cabinet). Carefully close door.
c. Turn air cleaner switch to ON.
TROUBLESHOOTING
Procedures in this section should be performed only by
qualified service personnel.
The following procedures will expose energized electrical
components. Disconnect power between checks and proceed
carefully. Electrical shock can cause injury or death.
Step 1ÐRecommended Service Tools
· Screwdriver, 8-in. common with insulated handle (plastic).
· Screwdrivers Phillips No. 1 and 2 with plastic insulated
handles.
· Needle-nose pliers
Fig. 15ÐElectrical Installation
A97068
GROUND
FIELD WIRING COMPARTMENT
(COVER PLATE REMOVED)
KNOCKOUT
PIGTAIL LEADS
(120 VAC)
8 
						

							· Fluke No. 8021B multimeter or equivalent
· Fluke No. 80K-40 high-voltage probe or equivalent.
Step 2ÐIndication of Electrical Trouble
Air cleaner is equipped with input power LED light (green) and
output voltage LED light (red) for indicating proper unit operation.
When unit is in normal operation, system blower running, access
door in place, control switch in the ON position, and indicating
lights go out, there is an electrical problem.
If green light goes out there is a problem in the primary circuit. If
red light goes out the problem is a shorted secondary. Although
failure of indicating lights should not be overlooked, this condition
is unusual and rather remote.
Step 3ÐElectrical Troubles and Their Conditions
Exercise the usual precautions when working with high
voltage.
When the circuit has been de-energized, always discharge any
residual current in the secondary with an insulated handle
screwdriver. Electrical shock can cause injury or death.
Always ground power supply and ionizing-collecting cell
when bench testing. Electrical shock can cause injury or
death.
PRIMARY CIRCUIT
Normal operation Ð For normal operation of electronic air
cleaner, system blower should be running and air cleaner switch
should be ON.
If there is supply line voltage at the service connections and no
input voltage to power supply (green light out), outage can be
located by checking operation of safety switch and interconnecting
wiring with multimeter. Refer to Circuit Diagram, Fig. 17 to check
operation of switches.
Follow these steps:
1. Assure that circuit breaker controlling air cleaner is in ON
position. Main fuse not open.
2. Set multimeter for reading AC voltage at a 200-v full scale for
120-v units.
3. Connect 1 lead of multimeter to load side of interlock switch.
Connect other lead to common (white) lead at a convenient
place in power supply assembly. Depress switch and measure
voltage. If there is no voltage reading, switch is defective and
should be replaced.
4. With white lead still connected as in step 3, connect multim-
eter test lead to loadside of the ON/OFF switch. ON/OFF
switch shall be in ON position. Actuate interlock switch and
measure voltage. If there is no voltage reading, ON/OFF
switch is defective and should be replaced.
SECONDARY CIRCUIT
1. Ionizing-Collecting Cell
Cell is electrically energized through a contact terminal
located at top center of cell. Ionizing wires and every other
collector plate are electrically charged while each interleaving
plate is grounded.
Fig. 16ÐMaintenance Procedures
A97069
REMOVE SOAK RINSE DRIP-DRY REPLACENOTE
AIR FLOW
DIRECTION ARROW
SHOULD POINT TO
THE FURNACE OR
AIR HANDLER
9 
						

							If space between charged and grounded plates is bridged with
conductive or semi-conductive material, a short circuit devel-
ops. The bridging or short may be caused by damaged plates
or foreign material lodged between or on plates.
Since cell is periodically removed from unit to wash away
collected dirt, it is susceptible to physical damage. Also, cell
contains ionizing wires which, due to their function, have to be
designed with minimal structural support and are susceptible
to breakage. However, trouble related to a shorted collector
cell is readily shown by output indicating light and can be
quickly isolated by a simple procedure.
To determine if a short exists in 1 or both of the collector cells,
turn electronic air cleaner OFF and remove both electronic
cells from cabinet. Close door and re-power unit. If red
performance light comes on, an electrical short exists in 1 or
both of the electronic cells. Replace cells in unit, 1 at a time,
to determine which cell is shorted.
Most troubles in the cell can be visually detected and
corrected. (See Table 2.)
NOTE:Ionizer collector cells are not designed for field repair.
Ionizing wires and insulators can be field replaced. It is not
recommended to attempt to replace other cell components, such as
collector plates, end plates, ionizer supports.
2. Ionizing Wire Replacement
Ionizing wire breakage is minimal because of the constant
tension design and fixed location of ionizing wire supports. If
necessary to replace a broken wire follow these instructions.Wires are supplied in coiled spring configuration, with clinch
nut on each end of wire.
Wire replacement requires pair of needle-nose pliers. Exercise
caution in removing any broken wires in collector cell. This
will prevent accidental shorting of cell and reduce need for
further maintenance.
Use the following procedure when replacing ionizing wire.
Handle with care as parts are sharp.
a. Carefully remove all remains of broken wire.
b. Grip new wire at each end with your thumb and index
finger. While stretching wire to approximately 6 in. allow
1 end of wire to uncoil between your thumb and index
finger.
c. Place 1 end of wire in slot in stainless steel support on
collector cell from front of cell. This support is partially
covered by cell brace in front of support.
d. Grip other end of ionizing wire with needle-nose pliers and
insert terminated end of wire into slot of support bar of
opposite end of collector cell.
e. Wire should be tight enough to be self supporting and
remain suspended between 2 support slots in support bar.
Fig. 17ÐCircuit Diagram
A97070
12
3
9
46
GN
RDO
O
RBL Y BK
1.	 Interlock Switch
2.	 On-Off Rocker Switch
3.	 50VA Stepdown Transformer
	 Class-2 24VAC Output
4.	 High Frequency Oscillator and 
	 High Voltage Power Supply Board
5.	 Output LED (Red)
6.	 Input LED (Green)
7.	 Ionizer-Collector Cells
8.	 Cell to Power Supply Contact
9.	 Jumper Wire (remove to install
	 optional Air Flow Sensor Kit) LEGEND
W
Y
W/O
W/O
5
8
77
10