- 2 -
‘
Unit Components
‘
Cabinet
Mounts to existing ductwork; houses the Ionizing-Collecting Cells and Prefilters.
Ionizing-Collecting Cells (Forever Filter
®
)
Collects the dust, dirt, and other particulates in the air. They contain the ionizing and
collecting sections. The cells must be installed with the ionizing wires on the air intake
side. A spring contact is located on the top of each cell and must be in the position to make
contact with the contact board assemblies on the bottom of the Power Tray Assembly.
Prefilters
Traps large particulates before they enter the Ionizing-Collecting Cell.
Power Tray Assembly
Contains the indicating lights, solid-state power supply, contact boards, and electrical
controls including the ON/OFF switch and safety interlock switch. A power cord at the rear
of the Power Tray allows the unit to be connected to a standard NEMA electrical receptacle
(NEMA 5-15R for 120 volt units and NEMA 6-20R for 240/250 volt units). European
models are supplied without a plug on the line cord to allow installation of desired plug or
permanent wiring to an electrical junction box (by others). A wiring compartment is
provided on all models at the rear of the Power Tray allowing the option to permanently
wire the unit directly to the HVAC System Control.
Air Flow Sensor (AFS
)
Controls the operation of the unit by sensing
the movement of air within the duct. This helps
reduce power usage when the HVAC system
blower is not in operation. The AFS is
designed to provide an efficient and reliable
method of controlling the operation of the air
cleaner when the installer is unable to wire the
unit directly into the HVAC System Blower
Control Circuit. The AFS utilizes a thermistor,
which when electrically powered heats up to approximately 130° F. The AFS stabilizes at
this temperature and while the HVAC system blower is in operation, air flows through the
ductwork, creating a vacuum effect that pulls cooler air over the hot surface of the
thermistor. This air movement cools down the thermistor which allows the AFS to register
that the HVAC system blower is moving air and the Electronic Air Cleaner must be powered
to provide air cleaning.
Air Cleaner Model Identification
The model number and part number for your Electronic
Air Cleaner can be found on the data label located on
the inside of the Front Panel Assembly.
- 23 -
‘
Installation
‘
‘
For Qualified HVAC Installer Only
‘
Secondary Circuit - Power Supply
If the Red CELL ENERGIZED light remains out with the Ionizing-Collecting Cells removed
from the cabinet, the power supply is defective. Specific problems in the Power Tray
Assembly can be isolated by using a Multimeter and High Voltage Probe to check the
output voltages.
To check the secondary circuit, a high voltage meter is required. See the section entitled
RECOMMENDED SERVICE TOOLS (page. 20). To check for proper operation, it is
imperative that the procedure be followed as outlined below:
1. Make sure the HVAC system is operating, the air cleaner ON/OFF switch is ON, and air
cleaner input voltage is correct (120V, 50-60Hz for 120V units and 240V, 50-60Hz for
240V units).
2. Remove Front Panel Assembly from air cleaner.
3. Remove Power Tray Assembly Cover.
4. Check the high voltage contact board assembly for damage or carbon tracking.
NOTE: The cell contacts must be visually checked for corrosion, excessive dirt
build-up, and electrical arc tracking (carbon path between stainless steel spring
contact and grounded metal). Clean or replace Contact Board assemblies and cell
contacts as required.
5. Replace both Ionizing-Collecting Cells in the air cleaner cabinet.
6. Make test connections from the High Voltage Probe to the Multimeter in accordance
with the probe’s instruction manual. The Multimeter should be set for reading DC
voltage at 20 volt full scale.
7. Attach the High Voltage Probe ground lead to the air cleaner cabinet. While depressing
the safety interlock switch lever, touch the ionizer wire support with end of the High
Voltage Probe. The meter reading should be 6.2 KVDC +/- 0.2 KVDC. The cell
contacts must be visually checked for corrosion, excessive dirt build-up, and electrical
arc tracking (carbon path from stainless steel spring to grounded metal). Clean or
replace as required.
8. If no voltage is measured, remove the first Ionizing-Collecting cell and check the
second cell by repeating step #7. The meter should read 6.2 KVDC +/- 0.2 KVDC.
9. If proper voltage is measured, the first cell is shorted. Refer to section entitled
COMMON TROUBLESHOOTING TECHNIQUES (page 9).
Continued on next page
