Page 1
MODELS GA50A14, GA50A22, GA50A20
Features
Lifetime Filter System never needs replacing
Electronically removes dust, mites, pollen, pet dander, tobacco smoke, cooking smoke
and grease, mold, fungi, bacteria, viruses and more, down to 0.01 micron
Light Weight Aluminum Collecting Cells are durable and easy to maintain
Cell Guide ensures proper placement of collecting cells
Activated Carbon Filters remove unpleasant odors
Electronic Air Proving Switch for quick wiring
Dual Indicator Lights show Air Cleaner is working at a glance
Galvanized Steel Cabinet for solid vertical or horizontal installation
Durable Scratch-Resistant powder coat paint finish resists corrosion
OWNER’S MANUAL
ELECTRONIC AIR CLEANERS
IMPORTANT: PLEASE READ MANUAL BEFORE OPERATING UNIT
Page 2
IMPORTANT: Please read entire instructions before
installing the Electronic Air Cleaner.
CONTENTS
SAFETY CONSIDERATIONS 2
WHAT THE ELECTRONIC AIR CLEANER DOES 2
BENEFITS 2
HOW IT WORKS 2
SPECIFICATIONS 3
COMPONENTS 3
INSTALLATION 3-5
Static Pressure 3
Location 3
Installation Location With Humidifier 4
Installation Location With Air Conditioner 4
Electronic Air Cleaner Installation 5
Wiring 5
SYSTEM CHECK 5
OPERATION 6
WHITE DUST 6
MAINTENANCE 6
Cell and Prefilter Cleaning 6
Activated Carbon Filter Replacement 6
SERVICE 7-10
Quick Check 7
Testing For High Voltage At Power Board 7
Measuring High Voltage At Power Board 7
Replacing Performance Light 7
Replacing A Power Board 8
Testing Air Proving Switch (APS) 8
Replacing An Air Proving Switch (APS) 8
Testing The 24 V Transformer 8
Replacing The 24 V Transformer 8
Setting Voltage Of Power Board 9
Setting Voltage Without High Voltage Meter 9
Testing For Voltage At The Cell 9
Testing Cell For Bad Contacts 9
Testing Cell with an Ohmmeter 9
Removing Power Box 10
Replacing A Tungsten Ionizing Wire 10
EXPLODED VIEW 10
PARTS LIST 11
TROUBLESHOOTING GUIDE 12
WARRANTY 15
Certified for shock and electrical fire hazard only.
SAFETY CONSIDERATIONS
Read and follow instructions carefully. Follow all local
electrical codes during installation. All wiring must conform
to local and national electrical codes. Improper wiring or
installation may damage Air Cleaner.
Understand the signal words WARNING and
CAUTION which are present in the Owner’s Manual.
WARNING and CAUTION signifies a hazard which
could result in property damage, personal injury or death.
WARNING
Before beginning any installation or modification, be
certain that the main line electrical disconnect switch is
in OFF position. Electric shock could result. Tag
disconnect switch with suitable warning labels.
Installation and servicing of Electronic Air
Cleaners can be hazardous. Only trained and qualified
service personnel should install, repair, or service
Electronic Air Cleaners.
Homeowners or untrained personnel can perform
the basic maintenance functions of cleaning and
replacing filters.
When working on air cleaning equipment, observe
precautions in the manual, labels attached to the unit,
and other safety precautions that may apply. Follow
all safety codes. Wear safety glasses and work gloves.
WHAT THE ELECTRONIC AIR CLEANER DOES
Your High Efficiency Electronic Air Cleaner has been
designed to remove atmospheric and household dust, coal
dust, insecticide dust, mites, pollen, mold spores, fungi,
bacteria, viruses, pet dander, cooking smoke and grease,
tobacco smoke particles, and more down to .01 micron
(.01 micron = 1/2,540,000 of an inch).
BENEFITS
Helps provide relief for allergy or asthma suffering.
Helps prevent damaging black dust from staining walls
and furnishings, reducing the amount of time and
money spent cleaning and redecorating.
Helps eliminate unpleasant odors (with use of optional
Carbon Filters).
Helps protect heating/cooling equipment, prolonging
the operating efficiency.
HOW IT WORKS
The High Efficiency Electronic Air Cleaner operates on
the principle of electrostatic precipitation. Millions of
airborne pollutants are carried through the return air ducts
of the heating/cooling system and treated through four
stages of filtration.
The prefilters (2) remove all large visible particles such
as lint. Smaller particles then pass through a two-stage
electrostatic collecting cell (2). First, particles are given a
powerful positive electrical charge by the ionizing wires.
Second, charged particles move into the collecting area
2 Prefilter
1 Dirty Air
4 Collecting Cell Plates
6 Clean Air to Heating/
Cooling System
3 Ionizing Section
Fig. 1
5 Carbon Filters (3)
(optional)
2
Page 3
Table 1 — SPECIFICATIONS
MODEL GA50A14 GA50A20 GA50A22
House Size Area
Airflow
Duct Size
Unit Weight
Input Voltage
Power Consumption
Options Included
<3000 ft²
<278.70 m²
up to 1400 CFM
up to 2380 m³/hr
16 x 25 in
40.5 x 63.5 cm
37 lbs
16.8 kg
120 V 60 Hz 120 V 60 Hz 120 V 60 Hz
30 Watts 30 Watts 30 Watts
Carbon Filters
Air Switch
where they are attracted to a series of grounded plates.
Pollutants are held in this section like a magnet until
washed away during cleaning. Lastly, clean air passes
over activated carbon filters (3) for odor removal .
The Electronic Air Cleaner, available in three models
with air flow capacities of up to 1400 and 2000 CFM
(2380 and 3400 m³/hr), is adaptable to all residential
forced air heating or cooling systems.
COMPONENTS
Cabinet: Constructed of heavy gauge galvanized steel
to resist corrosion and provide trouble-free installation.
Holes are provided to facilitate mounting to the ductwork
or air handling equipment.
Power Box: Removable. Contains the power switch,
performance indicator light, safety interlock switch, high
voltage power board, air proving switch and high voltage
contacts.
The power board is uniquely equipped with a variable
resistor (potentiometer) to adjust high voltage output.
Output has been pre-set for optimum efficiency. As
voltage varies in extreme conditions of dryness, humidity
or proximity to hydro towers, raising or lowering
potentiometer allows for proper voltage output.
Air Proving Switch (APS): Integrated. Automatically
cycles Air Cleaner on and off with the system fan. The
APS will detect airflow (fan on) and energize the Air
Performance Indicator Light
ON/OFF Switch
Power Box
Cabinet
Door
Collecting Cells (2)
Fig. 2
Prefilters (2)
Activated Carbon
Filters (3)
<3000 ft²
<278.70 m²
up to 1400 CFM
up to 2380 m³/hr
20 x 20 in
51.0 x 51.0 cm
37 lbs
16.8 kg
Carbon Filters
Air Switch
>3000 ft²
>278.70 m²
up to 2000 CFM
up to 3400 m³/hr
20 x 25 in
51.0 x 63.5 cm
41 lbs
18.6 kg
Carbon Filters
Air Switch
Cleaner.
Collecting Cells: Consist of an ionizing section and a
plate section. The arrow on the cell must point toward the
system fan.
Prefilters: Constructed of aluminum mesh, to prevent
lint and large particles from entering the collecting cells.
Carbon Filters: Remove odors. Must be replaced every
six months - not washable. Maximum of (3) carbon filters
can be used at same time.
INSTALLATION
Static Pressure
The static pressure drop across the Air Cleaner will
vary with CFM and whether the optional carbon filters
have been installed in the unit.
100% Air Flow
No Carbon
0.158 0.250 0.030 0.060
100% Air Flow
With Carbon
40% Air Flow
No Carbon
40% Air Flow
With Carbon
Table 2 — Pressure Drop (Inches WC)
Location
The Air Cleaner must only be installed in the return
air duct, as close to the fan compartment as possible.
This location provides the most even airflow across the
collecting cells and allows the Air Cleaner to keep the
system motor and blower clean. The installation can be
vertical or horizontal. When choosing a location, there
must be adequate room to wire the Air Cleaner and
remove prefilters, collecting cells and power box for
maintenance.
Note: Once Air Cleaner has been installed, do not allow
the placement of any device such as a new hot water
heater, water softener, gas pipe, or electrical cable to be
put 2 ft. in front of or within 6 in. (15 cm) from top of Air
Cleaner, in order to allow removal of filters and Air
Cleaner parts, which are necessary for maintenance or
servicing.
3
Page 4
Fig. 3 — DIMENSIONS
MODEL
GA50A14
GA50A22
GA50A20
DIMENSIONS — in (cm)
A B C D E F G H
19.8
(50.4)
24.7
(62.8)
24.7
(62.8)
15.9
(40.5)
20.8
(52.9)
20.8
(52.9)
26.1
(66.3)
21.2
(53.9)
25.8
(65.4)
13.6
(34.6)
18.0
(45.7)
18.0
(45.7)
24.1
(61.2)
18.7
(47.5)
23.3
(59.1)
1.0
(2.5)
1.3
(3.2)
1.3
(3.2)
26.6
(67.7)
21.7
(55.2)
26.3
(66.8)
25.8
(65.4)
21.2
(53.9)
25.8
(65.4)
Fig. 4 — AIR CLEANER INSTALLATION LOCATION
Fig. 4 — AIR CLEANER INSTALLATION LOCATION
Allow 24 in (600 mm) clearance for cleaning air cleaner. Allow 6 in. (150 mm) clearance for power box removal.
Allow 24 in (600 mm) clearance for cleaning air cleaner. Allow 6 in. (150 mm) clearance for power box removal.
Installation Location With Humidifier
A humidifier should be installed in the furnace warm
air duct. However, it may be installed in the return duct
without causing problems to the Air Cleaner. Care must
be taken to ensure that the humidifier does not leak, as
this may cause arcing and a mineral deposit to build up
on the collecting cells.
An atomizing type humidifier should be installed
downstream from the Air Cleaner. If the atomizing type
humidifier is installed upstream, high humidity, salts and
minerals may decrease the efficiency of the collecting
cells and cause service problems.
If the atomizing type humidifier must be installed
upstream, the following precautions should be taken:
1. Atomizing type humidifier must be installed as far
from the Air Cleaner as possible.
2. Collecting cells must be washed frequently to prevent
a mineral deposit build-up.
Installation Location With Air Conditioner
Whenever possible, the Air Cleaner should be
installed upstream of the cooling coil. This location will
clean the air before it reaches the evaporator coil.
4
Page 5
Electronic Air Cleaner Installation
1. Remove existing equipment filter. Thoroughly clean
fan compartment and ductwork where Air Cleaner is
to be installed.
2. Open access door. Slide filters and collecting cells
out of cabinet.
3. Place cabinet in ductwork. Holes are provided to
attach cabinet to ductwork or equipment. If the
adjoining ductwork is flanged, install the screws so
that the screw heads are inside the cabinet. This will
help prevent damage to prefilter and carbon filters
during removal for cleaning. Never put screws or
rivets into the removable power box.
When the air duct does not fit the Air Cleaner
opening, a gradual transition is recommended to
reduce air turbulence though the air Air Cleaner and
to increase its efficiency. There should not be more
than 20º of expansion used on each side of the
transition fitting. Do not reduce ductwork to a smaller
Air Cleaner or it will increase the velocity of airflow.
4. If the Air Cleaner is installed adjacent to an elbow or
angle fitting, turning vanes are recommended to
improve air distribution across the collecting cells.
5. After the Air Cleaner has been installed, seal seams
airtight with duct tape or caulking to prevent dust
from entering the system.
6. Replace the prefilters in the track on the air entering
side. Place the carbon filters evenly spaced in the
track on the air exiting side. The collecting cells are
placed between the tracks, with the arrow on cell
pointing towards the fan. The cell handle may need
to be repositioned if the airflow is in a different
direction than the left to right set up. The handle
should face the door. Close access door.
Wiring
WARNING
Electrical shock can cause injury or death. Be certain
main line disconnect switch is off before wiring.
Wiring should only be performed by qualified
personnel only. All wiring must comply with all applicable
codes and standards. The voltage of the power source
must match the voltage indicated on the Air Cleaner. The
Air Cleaner must operate ONLY when the system fan is
running. Make sure the Air Cleaner is properly grounded.
If the air cleaner is equipped with a cord and plug the
air cleaner can be plugged into an outlet within 6 feet of
the unit. Do not use an extension cord if the outlet is too
far away. Have an electrician wire in a new outlet closer
to the air cleaner.
If the air cleaner is not equipped with a cord then wire
the Air Cleaner directly to a 120 V power source
preferably to the same source that is supplying power to
the furnace or air handler. The APS will power the Air
Cleaner when there is sufficient airflow to activate the
sensor. See Fig 5.
Note: The power switch will be lit even if there is no
airflow.
If the unit is to be wired to the EAC contacts on the
system module check that there is sufficient voltage to
the EAC contacts with the fan operating in all conditions.
Some systems do not power the contacts on low speed.
SYSTEM CHECK
Perform the following system check before operation.
1. Replace prefilters, collecting cells and carbon filters.
Close access door.
2. Turn Air Cleaner power switch ON. Ensure system
fan is operating. Both the power switch light and
performance indicator light should be lit. The power
switch light indicates the Air Cleaner has unit voltage.
The performance indicator light shows that the Air
Cleaner is operating.
Fig. 5 — Air Cleaner Schematic (with Air Proving Switch)
5
Page 6
Note: There may be some arcing or snapping sounds
from the collecting cells. This is normal when the unit is
new. In about 2 weeks, as the sharp edges of the cells
become smoother, the arcing will disappear.
OPERATION
The Air Cleaner will run as long as there is adequate
airflow through the ducts. The Air Cleaner will not run if
the system fan is off. For proper operation, follow these
simple steps:
1. Run heating/cooling system fan continuously, and on
low speed if available.
2. Remove furniture or carpets which block return air
grilles throughout your house, so that air moves
freely to the furnace/ air conditioner.
3. Check for proper operation of the system fan.
WHITE DUST
After installation of the Air Cleaner, you may notice
some white dust on tabletops and shelves. Most large
particles such as lint, are too heavy to remain airborne
and tend to settle quickly, never reaching the air cleaner.
This white visible dust is normally referred to as
“clean dust.” As the Air Cleaner is removing the dark and
staining particles from the air, the lint will also be cleaner.
Lint dust is most noticeable on dark furnishings; in
homes containing new carpeting; and where there is a lot
of household traffic from occupants and pets. To reduce
lint dust, use continuous fan operation and keep return
vents unrestricted to create an efficient airflow.
Note: The Air Cleaner does NOT produce more lint or
dust.
MAINTENANCE
It is important to follow a scheduled maintenance for
maximum performance of the Air Cleaner.
CAUTION
Make sure to turn Air Cleaner and system fan OFF
before performing any maintenance or removing any
components.
3. Rinse cells well with hot water (maximum 120°F/49°
C).
4. To remove contaminate from the ionizing wires use
an old toothbrush. Slide the brush bristles over the
wire and gently drag the brush up and down the wire
once. Be very careful when cleaning the wires as
they become very brittle with age.
5. If dirt remains on the cell plates, let the cells soak in a
solution of DAX Detergent and water for 30 minutes.
6. Tilt cells on 45° angle on their short side, with arrows
pointing sideways. Allow to dry completely,
approximately 8-10 hours. A hair dryer may be used
to speed up drying time.
7. To wash prefilters, spray with DAX Detergent, rinse
and let dry. Do not wash in the same water as
collecting cells.
8. Do not place the cells in the air cleaner if they are
wet.
9. Place cells and prefilters back into cabinet. Close
door and turn power switch ON. If the performance
light does not come on or arcing occurs, turn Air
Cleaner OFF and allow air from system fan to dry
cells completely.
CAUTION
Damage to cells may occur if improperly handled or
washed. Do not wash cells in a dishwasher. Never use
any object to clean between the cell plates, as this may
cause damage to plates or ionizing wires. Never place
cell in oven to dry. The edges of the cell may be sharp handle with care.
Activated Carbon Filter Replacement
Carbon filters help remove odors from the air. If the
Air Cleaner has been equipped with optional carbon
filters, they should be replaced every 3 - 6 months. Filters
are NOT washable. Replacements are available through
Cell And Prefilter Cleaning
The collecting cells and prefilters must be cleaned on a
regular basis for the Air Cleaner to function at its peak of
efficiency. The frequency of cleaning will vary from one
house to another. On average, the cells should be
cleaned every 3 months.
1. Remove access door, collecting cells and prefilters.
2. Place cells in a laundry tub. Rinse with hot water and
spray completely with DAX Detergent (or a nonchlorine, non-corrosive, non-abrasive liquid
household detergent. Allow detergent to run down
both sides of plates and ionizing wires. Let stand for
5 minutes or fill up laundry tub with water and DAX
Detergent, and dunk cells up and down until water is
dirty.
Fig. 6 — DAX Detergent and Carbon Filters are
DAX 32 oz Spray Bottle Part #9900
Replacement Carbon Filters:
GA50A14 Set of 3 Part #EAC14-12
GA50A20, GA50A22 Set of 3 Part #EAC20-12
6
Page 7
your installer or dealer. To replace filters, perform the
following functions:
1. Turn Air Cleaner power switch OFF.
2. Turn off system fan.
3. Open access door.
4. Remove collecting cells from Air Cleaner.
5. Remove the used carbon filters from Air Cleaner.
6. Put new carbon filters into Air Cleaner. Space filters
evenly across the discharge opening of Air Cleaner.
Never put more than 3 carbon filters in the Air
Cleaner, as this may cause a problem with airflow.
SERVICE
WARNING
Electronic Air Cleaners use high voltage (low
amperage). Only trained personnel should perform
service. USE CAUTION! Electric shock can cause injury
or death.
CAUTION
For most troubleshooting the cells should be
removed from the Air Cleaner. A short in one of the
cells will cause the power board to shutdown and the
performance light will stay off. Unless otherwise directed
remove the cells from the unit when testing.
The Air Cleaner when operating normally, with the
fan running, should have both the switch light and the
performance indicator light ON. If the fan is running and
the lights are not on see the Troubleshooting Guide for
probable causes and remedies.
WARNING
When performing LIVE tests in the power box NEVER
touch any parts other then what are mentioned in the
tests. Components carry dangerous voltages and
extreme care must be taken.
Quick Check (Power Light ON, Performance Light OFF)
1. Make sure the system fan is ON. Remove both
cells.
2. Close the door. If the light is still out, check the
power board for an arc to ground at HV1 or HV2. If
there is a good arc and no performance light then
replace the light. If the light comes on check the
cells for a fault.
3. If there is no arc, test the output voltage of the
transformer. If there is transformer output replace
the power board
4. If there is no transformer output, check for output of
the APS.
5. If there is output from the APS replace the
transformer and retest the power board for an arc.
6. If there is no output from the APS, jumper terminals
3 & 4 on the APS and retest the output. If there is
APS output with the jumper, replace the APS.
7. If there is no output from the APS check the output
voltage from the on/off switch.
8. If there is no voltage from the switch, test the input
to the switch. If there is input replace the switch. If
there is no input to the switch check the interlock
switch and the supply voltage.
Testing For High Voltage At Power Board
With the collecting cells out of the unit, the door on
the unit and the system fan on high speed, turn the Air
Cleaner ON.
With a long shafted screwdriver, with a plastic
handle, short between the grounded side of the power
box and the HV1 terminal of the power board.
If you draw a good spark, there is high voltage from
the power board.
Measuring High Voltage At Power Board
A high voltage meter capable of measuring up to
10,000 VDC is required to test the voltage.
1. The Air Cleaner should be ON with the cells installed,
the door closed and the system fan running. The Air
Cleaner should be on at least 5 minutes to allow
voltage to stabilize. The cells and ionizing wires must
be clean.
2. Remove the cover from power box.
3. Connect the ground of the high voltage meter to an
unpainted surface in the power box.
4. Check terminals HV1 and HV2 on the power board to
determine if voltage is present. See Table 3 for
values..
5. If no voltage is present, remove both cells from the
Air Cleaner and replace door.
a. Check the voltage at HV1 and HV2 again.
b. If voltage is present, the problem is with one of
the cells or the wiring to the copper contacts.
c. With a flashlight, look into the cabinet to check
condition of the copper contacts.
d. If the contacts are not bent, replace one cell and
retest voltage. If cell is OK, test the other cell. If
the problem is with a cell, see Troubleshooting
Guide.
e. If there is no voltage with both cells removed,
check the power board, APS and transformer to
make sure that they are functioning correctly.
6. If there is voltage present, but the performance light
does not come on, replace light.
7. High voltage can be adjusted with high voltage
potentiometer if required. See Table 3.
Replacing A Performance Light
Before replacing the performance light, turn OFF
power to the Air Cleaner at the source.
1. Remove the power box cover.
2. Disconnect the performance light wiring connected to
the LED terminals on the power board. Carefully cut
the wire ties from the wire bundle.
7
Page 8
3. Push the light out through front of power box.
4. Push the new light into the power box.
5. Connect the wiring to the LED terminals on the power
board. P3 - red; P4 - black. Route the wires away
from the high voltage wires or contacts.
6. Replace cover.
7. Return power to Air Cleaner. Test light.
Replacing A Power Board
Before replacing the power board, turn OFF power to
the Air Cleaner at the source or remove the plug.
1. Remove the power box cover.
2. Disconnect wiring from the LED, HV1, HV2 and 24 V
terminals. Make note of position of wires.
3. Remove the three hex nuts from the power board.
4. Remove the power board from the studs.
5. Place the new board onto studs with the 24 volt input
close to the transformer.
6. Replace the hex nuts removed in Step 3. Ensure the
star washer is in place over the steel spacer at the
ground location on the power board. For proper
grounding the washer must be located on the top of
the steel spacer, under the power board.
7. Reconnect wiring to LED, HV1, HV2, and 24 V
terminals on the new power board. See Fig. 5.
8. Return power to Air Cleaner. Test power board.
9. Replace power box cover.
Note: The power board has been set before shipping. It
is not usually necessary to reset the voltage to the new
load. If you do need to adjust the voltage refer to Setting
Voltage of Power Board section for more information.
Testing Air Proving Switch (APS)
The APS sensor must sit in the plastic bushing to
operate correctly. The sensor is very sensitive and
operation may be affected by cold ambient temperatures,
an air exchanger, or a fresh air duct connected to the
return air duct just upstream of the Air Cleaner.
The APS uses a Triac in its output circuit, which
affects the voltage sine wave. Using a regular digital
voltmeter may give a false reading. To check the output
from the APS, use a true RMS (root mean square) meter
to measure the output at terminals 1 and 4 of the APS.
The output should be between 105 and 115 VAC,
depending on the airflow across the sensor.
A 125 volt neon lamp may be used to test the output
of the APS. Place the leads of the lamp across terminals
1 and 4 of the APS. If the lamp lights, the voltage is
sufficient for operation. Do not use performance light.
When the Air Cleaner is turned on without airflow, the
APS sensor heats up, and after 20-30 seconds opens the
circuit to turn off the power board. When the fan starts up
(the sensor is cooled), the circuit will close, the power
board is turned on, and the performance light will come
on.
The light on the power switch will be lit even when
the APS is open.
If the power board fails to come on with the fan on,
check that the sensor is properly set down, to the bottom
of the plastic bushing, in the front of the power box. To
check the APS for proper operation remove the collecting
cells, turn the unit ON without the fan on. The power
board should come on immediately, and then turn off in
20-30 seconds as the sensor heats up. To check sensor,
blow directly on it lightly. This should activate the power
board within 10 seconds. Service the sensor carefully.
The sensor leads are 120 V. If the APS does not turn the
power board and performance indicator on, by-pass the
APS by placing a jumper between wires 3 & 4 on the
APS. This removes the APS from the circuit.
See Troubleshooting Guide for more information.
Note: If the air flow through the Air Cleaner is less than
360 CFM the APS sensor may not have enough air flow
to activate the Air Cleaner. See Wiring for information
how to wire the Air Cleaner to the EAC module of the
system. In very low air applications the Air Cleaner may
need to be wired through the EAC contacts and the APS
disabled by connecting wires 3 & 4 together.
If there is no EAC module or it is not powered on low
speed then a relay will have to be installed to activate the
Air Cleaner when the fan starts. The APS will have to be
disabled.
Replacing An Air Proving Switch (APS)
Before replacing the APS, turn OFF the power to the
Air Cleaner at the source.
1. Disconnect wiring from terminals 1, 2, 3, and 4 on the
APS. See Fig. 5.
2. Remove the circuit board from the studs by removing
the two nuts. Do not remove the spacers.
3. Install the new APS on the studs and secure with the
nuts. Ensure sensor protrudes only to the bottom of
the plastic bushing.
4. Connect wiring to terminals on APS. See Fig. 5.
Wiring from the power switch is connected to
terminals 2 and 3. Wiring to the transformer is
connected to terminals 1 and 4.
5. Test the new APS.
Testing The 24 V Transformer
1. Remove power box cover.
2. Disconnect the leads of the 24 V transformer from
the power board. See Fig. 5. Do not short leads.
3. The Air Cleaner should be ON. The system fan
should be running on high speed. The access door
should be closed.
4. Measure voltage across the leads with a voltmeter.
Voltage should read 25 - 28 VAC.
5. If no voltage is present, check operation of the APS.
6. Reconnect leads to the power board.
7. Replace power box cover.
Replacing The 24 V Transformer
Before replacing the transformer, check the
resistance across the power board 24 V input terminals,
8
Page 9
without the transformer connected. Resistance should
read above 20K ohms with an analog meter and above
4M ohms with a digital meter. If the resistance readings
are below these values, the power board may be the
cause of the transformer failure.
Before replacing the 24 V transformer, turn OFF power to
the Air Cleaner at the source.
1. Remove power box cover.
2. Disconnect the secondary leads from the transformer
to the 24 V terminals on the power board. See Fig. 5.
3. Cut the primary leads (to the APS) close to the
transformer or disconnect leads from the APS.
4. Remove the 2 hex nuts and washers from the
transformer studs.
5. Remove the transformer.
6. Place new transformer over studs and re-install 2 star
washers and hex nuts to secure into place.
7. Connect secondary leads (white) to the 24 V
terminals on the power board (P1 & P2).
8. Wire nut primary leads from APS (cut in Step 3) to
the primary leads of the new transformer or connect
primary leads to APS terminals 1 & 4.
9. Replace power box cover.
10. Turn ON the power to the Air Cleaner and test.
Setting Voltage Of Power Board
Voltage on the power board may drop below required
level when installation area is too damp, too cold, or if
there is a leakage of water from a humidifier. Voltage on
power board may be too high when installation area is
too dry or too hot, or home is in close proximity to hydro
towers or situated in remote farm land areas. By
adjusting the HV Adj. potentiometer, the voltage can be
set to optimum level. A high voltage meter capable of
measuring 10,000 VDC is required. To test and adjust
voltage level, perform the following procedure:
1. Turn the Air Cleaner OFF.
2. Remove the power box cover.
3. Connect the ground of the high voltage meter to an
unpainted surface in the power box.
4. Turn ON the Air Cleaner and wait 5 minutes before
checking voltages to allow voltages on cells to
stabilize. The cells and ionizing wires must be clean.
5. Measure the voltages at HV1 and HV2 on the power
board.
6. Adjust the HV Adj. potentiometer until the voltage
reading matches the voltage in Table 3. Adjusting the
potentiometer clockwise decreases the voltage and
turning counter-clockwise increases the voltage.
7. Turn OFF the Air Cleaner.
Model Maximum Voltage
on Plates (KVDC)
Maximum Voltage
on Ionizer (KVDC)
8. Remove the high voltage meter.
9. Replace the power box cover.
10. Turn ON the Air Cleaner.
Setting Approximate Voltage Without High Voltage
Meter
A high voltage meter should be used to set the high
voltage. If one is not available, this method can be used.
This will only set an approximate voltage. After using this
method, the voltage should be reset with a high voltage
meter as soon as possible.
1. Remove power box cover.
2. Turn the HV Adj. potentiometer fully counter-
clockwise. The Air Cleaner may arc or snap at this
point.
3. Turn the HV Adj. potentiometer back, clockwise, until
the arrow is between 6 and 8 on the dial or on the +
side of the half way point.
4. Replace power box cover.
Testing for Voltage At The Cell
1. Open access door to Air Cleaner.
2. The cells must be in the Air Cleaner for this test and
the system fan should be on high speed.
3. Turn the Air Cleaner ON and press the safety
interlock switch lever.
4. Place a plastic handled screwdriver into the direction
arrow slot. Do not apply excessive force.
5. If there is a good snap then there is high voltage at
the cell.
Testing Cell For Bad Contacts
1. Open access door to Air Cleaner.
2. The cells must be in the Air Cleaner for this test and
the system fan should be on high speed.
3. Turn the Air Cleaner ON and press the safety
interlock switch lever.
4. Place a plastic handled screwdriver into the direction
arrow slot. Do not apply excessive force.
5. There should be an initial snap when the plates are
shorted, then no sound. If a hissing occurs, then
there is a bad contact. Look along the top of the cell,
with the short still in place. If there is a small arc
between the cell top and copper contact, then that is
the bad contact. Pull cell out and gently pull the
copper contact down.
6. If an arc is not seen and there is a bad contact, then
the problem may be an internal contact in one of the
cells.
7. Let up on safety interlock.
8. Close access door.
See below for additional testing.
GA50A14 4.8 - 5.3 (HV1) 7.2 - 8.0 (HV2)
GA50A20, GA50A22 4.8 - 5.2 (HV1) 7.2 - 7.8 (HV2)
Table 3 — Power Board Voltage Settings (with load)
The voltage will be higher without the cells in the unit.
Testing Cell with an Ohmmeter
To test the cell for a dead short or a bad contact an
ohmmeter can be used. Always discharge the cell with
a screw driver before testing with an ohmmeter.
9
Page 10
1. With the ohmmeter set on its lowest scale take a
reading between the top center contact of the cell
and the ionizing fingers on the bottom of the cell. You
should have continuity. If you do not then there is a
bad contact between the center contact and the top
set of ionizing fingers.
2. Test the resistance between the top center contact
and the cell frame. You should read infinite
resistance. If not you have a short in the ionizing
section.
3. Take a reading between the two outside contacts on
the top of the cell. You should have continuity. If you
do not then there is a bad contact between one of the
contacts to the live cell plate. Test each top outside
contact to the last plate in the cell to determine which
contact is not mating properly.
4. Test the resistance between the outside contacts and
the cell frame. You should read infinite resistance. If
not you have a short in the collecting section.
5. If you have a bad contact adjust the internal contacts
within the cell until contact is made.
Removing Power Box
1. Turn the main system switch OFF or disconnect the
power cord.
2. Remove the power box cover.
3. If the unit does not have a cord disconnect the
source wires to the Air Cleaner. Cap off the wires so
the system can still be operated.
4. Remove the two nuts holding the power box to the
cabinet.
5. Slide the power box forward then up to remove it
from the cabinet.
6. If you are removing the power box for any length of
time tape a cover over the top opening to prevent air
from entering into the system.
Replacing A Tungsten Ionizing Wire
Replacement wires are cut to the correct length and
have eyelets at each end for easy replacement.
1. Turn OFF power to Air Cleaner.
2. Remove cell from Air Cleaner.
3. Remove all parts of broken wire from the cell. If
necessary, the cell may be used temporarily with one
wire missing until a replacement is received.
4. Place one end of the loop over the finger at the
bottom of the cell.
5. Using needle-nose pliers, grip the other end of wire,
near the bottom of the top loop. Pull the wire up
toward the top finger. As you apply tension, the
bottom finger will give, allowing the placement of the
loop around the top finger.
6. Install cell in Air Cleaner.
7. Return power to Air Cleaner.
8. Test cell for proper operation.
Fig. 7 — Exploded View
# Part Description
1 On/Off Switch
2 Safety Interlock Switch
3 Performance Indicator Light (Green LED)
4 Air Proving Switch
5 24 Volt Transformer
6 Power Board
7 Fibreboard (with 4 Copper Contacts)
8 Copper Contact
9 Cord Assembly (Optional)
10 Cover for Power Box
11 Power Box Complete (No Cover)
12 Carbon Filters (Set of 3)
13 Prefilter
14 Cell Guide (Plastic)
15 Collecting Cell
16 Cell Handle
17 Door (with Plastic Clip & Handle)
18 Door Handle (Plastic)
19 Ionizing Wire
20 Male & Female Door Clip Set
21 Door Label (Important… Wait 15 Seconds)
22 Door Label (Cleaning Instructions)
23 Dax Detergent
Use Part Numbers When Ordering (See next page)
10
Page 11
Parts List
Use the diagram on the preceding page to identify the part which is required. To order
parts call the number listed at the bottom of the page or call your local contractor.
# Part Description
1 On/Off Switch
2 Safety Interlock Switch
3 Performance Indicator Light (Green LED)
4 Air Proving Switch
5 24 Volt Transformer
6 Power Board
7 Fibreboard (with 4 Copper Contacts)
8 Copper Contact
9 Cord Assembly (Optional)
10 Cover for Power Box
11 Power Box Complete (No Cover)
12 Carbon Filters (Set of 3)
13 Prefilter
Type 11A
GA50A14
EAC14-01 EAC14-01 EAC14-01
EAC14-02 EAC14-02 EAC14-02
EAC14-03 EAC14-03 EAC14-03
EAC14-04 EAC14-04 EAC14-04
EAC14-05 EAC14-05 EAC14-05
EAC14-06 EAC20-06 EAC20-06
EAC14-07 EAC22-07 EAC20-07
EAC14-08 EAC14-08 EAC14-08
EAC14-09 EAC14-09 EAC14-09
EAC14-10 EAC22-10 EAC14-10
EAC14-11 EAC22-11 EAC20-11
EAC14-12 EAC20-12 EAC20-12
EAC14-13 EAC22-13 EAC20-13
Type 12A
GA50A22
Type 18A
GA50A20
14 Cell Guide (Plastic)
15 Collecting Cell
16 Cell Handle
17 Door (with Plastic Clip & Handle)
18 Door Handle (Plastic)
19 Ionizing Wire
20 Male & Female Door Clip Set
21 Door Label (Wait 15 Seconds...)
22 Door Label (Cleaning Instructions)
EAC14-14 EAC14-14 EAC14-14
EAC14-15 EAC22-15 EAC20-15
EAC14-16 EAC14-16 EAC14-16
EAC14-17 EAC20-17 EAC20-17
EAC14-18 EAC14-18 EAC14-18
EAC14-19 EAC20-19 EAC20-19
EAC14-20 EAC14-20 EAC14-20
EAC14-21 EAC14-21 EAC14-21
EAC14-22 EAC14-22 EAC14-22
23 Dax Detergent 9900 9900 9900
11
Page 12
Table 4 — TROUBLESHOOTING GUIDE
PROBLEM PROBABLE CAUSE REMEDY
System fan is not on. Turn system fan on.
Unit does not function
correctly. Power light
and performance indicator light are OFF.
Unit does not function
correctly. Power light is
ON and performance
indicator light is OFF.
Power light is OFF and
performance indicator
light is ON.
Cell makes loud hissing
noise or causes radio
interference.
Cells arcing excessively
(power light and performance indicator light
ON or flashing).
Cells arcing excessively
at top of cell near copper contacts (power
light and performance
indicator light ON).
Cells not collecting dirt
(power light and performance indicator light
ON).
Ozone odor
White dust
Wiring improperly connected. Check wiring or if plug is inserted and receptacle is powered.
Defective power switch. Check power switch for continuity with ohmmeter. Replace if defective.
Defective safety interlock. Remove door and press safety interlock with a screwdriver. If lights
Short in cells due to:
1. Broken ionizing wire.
2. Large particles wedged between cell plates.
3. Cells washed recently and are still wet.
4. Cell end plate insulator is dirty or damaged.
5. Cell plate(s) are bent.
Defective performance indicator light. Determine whether high voltage is present by testing power board. If
Defective power board. Adjust high voltage potentiometer on power board counter-clockwise. If
Air Proving Switch (APS) sensor is burnt out. Remove power box lid and blow lightly for 10 seconds on APS sensor
Air Proving Switch is not getting enough air
across the sensor.
Off board 24V transformer is not working. Verify output of transformer. Replace if necessary.
Defective power switch. Verify output of switch. Replace if necessary.
Defective power switch light. Replace power switch.
Internal cell contacts are not touching plates. Test contacts and repair.
Copper contacts on high voltage tray not making
good connection on cell.
Cells wet from washing. Allow cells to dry completely.
Particles lodged in cell or broken ionizing wire. Wash cell. Shake particle out of cell. Replace wire, if necessary.
Ducts were not cleaned prior to installation of air
cleaner.
Cell plates are bent. Remove cells and adjust to original spacing using needle-nose pliers.
Dirty cells. Wash cells and clean ionizing wires.
Voltage is too high. Adjust high voltage potentiometer on power board clockwise.
High voltage wires are on wrong copper contact. Reposition high voltage wires on proper contact (see Fig. 5).
Internal contact on cell out of alignment. Realign cell contact.
Humidifier (if installed) is leaking water on air
cleaner.
Copper contact on high voltage contact board
are broken or bent upward.
Arrow on cells not pointing towards fan blower. Reposition cell handle and place cell in properly.
System fan is on “Automatic” setting (air cleaner
not on continuously)
Not enough voltage on collecting cells. Adjust high voltage potentiometer counter-clockwise on power board.
Cell plates are bent. Straighten with needle-nose pliers.
Loose or broken ionizing wire. Replace wires.
Dirty cells. Wash cells and clean ionizing wires.
Air Cleaner is on when system fan is not run-
ning. Air cleaner wired incorrectly or air proving
switch is defective.
Incoming voltage is higher than 120V. Adjust high voltage potentiometer clockwise on power board.
Air Cleaner is oversized for house. Not enough
airflow to cover surface area of cells.
Home is extremely dry. Repair or install central humidifier.
Clean lint dust too heavy to remain airborne. Keep fan running continuously. Ensure that return air grilles are not
Gaps around Air Cleaner. Seal or use duct tape around Air Cleaner cabinet.
come on, bend interlock lever towards front and close door.
1. Remove wire or wire fragments. Replace.
2. Shake large particles out or wash cell.
3. Allow cells to dry completely.
4. Clean or replace end plate insulator.
5. Straighten plates with pliers.
voltage is present, replace indicator light.
high voltage is not present, replace power board.
at bottom of power box. If light does not come on, replace APS.
Check that sensor is located in the plastic bushing at the front of the
power box.
Check that the return duct is installed flush to the top and front edge of
the Air Cleaner duct opening.
Ensure there is a minimum of 360 CFM of air to the air cleaner.
With needle-nose pliers, gently pull contacts down or replace contacts.
Clean ducts.
Repair humidifier. If possible, move humidifier to different location.
If possible, pull down contacts with needle-nose pliers or remove power
box and replace contacts.
Use “Fan On” system fan setting for continuous fan operation.
Check operation and wiring of air switch and air cleaner.
Use correct size of Air Cleaner.
obstructed.
12
Page 13
Cleaning Record
The collecting cells and prefilters must be cleaned on a regular basis for the Air Cleaner to
function at its peak of efficiency. The frequency of cleaning will vary from one house to
another. On average, the cells should be cleaned every 3 months.
Use the chart below to keep track of your cleaning schedule.
DATE CLEANED DATE CLEANED DATE CLEANED
13
Page 14
NOTES:
14
Page 15
ELECTRONIC AIR CLEANER
LIMITED FIVE YEAR WARRANTY
Electronic Air Cleaners, if properly registered by the return of the attached warranty registration to
General Filters, Inc., are warranted to the consumer against defects in materials and workmanship for
a period of five years from the date of installation, so long as the product has been installed and
operated in accordance with all appropriate manuals and wiring diagrams. Replacement or routinely
replaceable parts such as prefilters, ionizing wires or carbon filters, are not covered by this limited
warranty or any other warranties. Any other defective parts will be repaired without charge except for
removal, reinstallation and transportation costs. To obtain repair service under this limited warranty,
the consumer must send the defective part to General Filters, Inc.
THERE ARE NOT EXPRESS WARRANTIES COVERING THIS ELECTRONIC AIR CLEANER
OTHER THAN AS SET FORTH ABOVE. THE IMPLIED WARRANTIES OF MERCHANTABILITY AND
FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY EXCLUDED. THE MANUFACTURER
ASSUMES NO LIABILITY IN CONNECTION WITH THE INSTALLATION OR USE OF THIS
PRODUCT, EXCEPT AS STATED IN THE LIMITED WARRANTY. THE MANUFACTURER WILL IN
NO EVENT BE LIABLE FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES.
This limited warranty gives you specific legal rights, and you may also have other rights which vary
from state to state. Some states do not allow either limitations on implied warranties, or exclusions
from incidental or consequential damages, so the above exclusion and limitation may not apply to you.
Any questions pertaining to this limited warranty should be addressed to General Filters, Inc. General
Filters, Inc. has elected not to make available the informal dispute settlement mechanism which is
specified in the Magnuson-Moss Warranty Act.
G
GFI-SASD2-Rev-G.pub
Rev. G 04/11
Page 16
ATTENTION INSTALLER
IMPORTANT WIRING INFORMATION
This Electronic Air Cleaner is equipped with an Air Proving Switch (APS). The
recommended source for the input voltage to the Air Cleaner is from the same
source that is supplying the heating/cooling equipment, providing it is the
same voltage as the Air Cleaner. The Air Cleaner should be wired directly to
the power source. The APS will power the Air Cleaner when there is sufficient
airflow to activate the sensor.
If you wish to wire the Air Cleaner to the EAC / Accessories Module on the
circuit board of the furnace or air handler, ensure that there is 115 Volt output
from these terminals, when the unit is run manually and is running on low
speed. Some manufacturers do not supply full output voltage to the terminals
in the low speed mode, so the Air Cleaner will not function. The green
Performance Indicator Light will not turn on.
The Air Cleaner performs best when the system fan is on “FAN ON” or
“Continuous” mode, and is run on the low speed. Check the output of the
terminals with a volt meter when running on low speed, before wiring the Air
Cleaner to the circuit board.
The Air Cleaner must be wired to operate only when the system fan is on.
See page 5 of the Owner’s Manual for more information on wiring.
Loading...