Instruction manual

9
3. If the fuse is NOT blown, check the ON/OFF switches and
safety interlock switch for proper engagement and
operation. This can be completed using a volt ohm
millimeter on a scale that will measure ohms as low as 1.0.
If you are using the recommended meter previously
mentioned in this manual, set the meter to read 200 ohm
and proceed with Steps 4 through 6.
4. Remove the fuse. Connect one lead to the test pin located
directly beside the wire that connects the ON/OFF switch to
the power supply board. Connect the other lead to the fuse
connection closest to the front panel.
5. Turn the ON/OFF switch to the ON position and depress
the safety interlock switch. The meter should have the
capability of reading levels as low as 1.0 ohm.
6. If there is no reading on the meter, begin the process of
elimination by disconnecting the wire from the test point
and connecting it to the terminal with the blue wire located
on the safety interlock switch. Depress the safety interlock
switch. If the reading on the meter is greater than 1.0 ohm,
the safety interlock switch is defective and must be replaced.
If the reading on the meter is less than 1.0 ohm, the
ON/OFF switch is defective and must be replaced.
Ionizing--Collecting Cell
Secondary Circuit
The cell is electrically energized through a contact terminal located
at the top center of the cell. The ionizing wires and alternating
collector plates are electrically charged while the interleaving plates
are grounded. If the space between the charged and grounded
plates is bridged with conductive or semi-- conductive material, a
short circuit develops. The bridging or short may be caused by
damaged plates, or foreign material lodged between/on the
components.
Since the cell should be periodically removed from the unit to
wash away collected dirt, it is susceptible to physical damage. The
cell also contains the ionizing wires which, due to their function,
have been designed with minimal structural support and are
susceptible to breakage. However, trouble related to a shorted
collector cell is readily shown by the Red CELL ENERGIZED
light and can be quickly isolated by a simple procedure.
To determine if a short exists in one or both of the collector cells,
turn the Electronic Air Cleaner OFF and remove both electronic
cells from the cabinet. Shut the door and repower the unit. If the
Red CELL ENERGIZED light comes on, an electrical short exists
in one or both of the electronic cells. Replace the cells in the unit,
one at a time, to determine which cell is shorted. Most troubles in
the cell can be visually detected and corrected.
NOTE: The ionizer collector cells are not designed for field repair.
Ionizing wires and insulators can be field replaced. It is not
recommended that you attempt to replace other cell components
(i.e. Collector plates, end plates, ionizer supports).
Replacing the Ionizing Wires
Ionizing wire breakage is minimal because of the constant tension
design and fixed location of the ionizing wire supports. When an
ionizing wire breaks, the efficiency of the Electronic Air Cleaner
will decrease slightly. However, the unit will continue to operate
with broken ionizing wires as long as the broken wires have not
caused a short circuit of the unit. Remove all loose and broken
wires as soon as they are identified. Although the replacement of
the ionizing wires can be attempted by a homeowner, it is
recommend that you should contact a qualified HVAC contractor
for replacement parts and/or servicing.
Wires are supplied in a coiled spring configuration, with a clinch
nut on each end of the wire. Replacement requires a pair of needle
nose pliers. Exercise caution in removing any broken wires in the
collector cell. This will prevent accidental shorting of the cell and
reduce the need for further maintenance. Use the following
procedure when replacing an ionizing wire.
1. Ensure that all power to the Electronic Air Cleaner is OFF,
remove the access door and remove the ionizing --collector
cells from the unit.
2. Carefully remove all remains of the broken wire.
3. Grip the new wire at each end of the wire with your thumb
and index finger. While stretching the wire to approximately
6” (152 mm) allow one end of the wire to uncoil between
your thumb and index finger.
4. Place one end of the wire in the slot of the stainless steel
support on the collector cell from the front of the cell. This
support is partially covered by the cell brace in front of the
support.
5. Grip the other end of the ionizing wire with needle nose
pliers and insert the terminated end of the wire into the slot
on the support bar of the opposite end of the collector cell.
6. The wire should be tight enough to be self supporting and
remain suspended between the two support slots in the
support bar.
ELECTRICAL SHOCK HAZARD
Failure to follow this warning could result in personal injury
or death.
The following procedures could expose hazardous live
components. Only a trained, experienced service person
should install this electronic air cleaner. Before performing
installation, service or maintenance operations on unit, turn off
all power to u nit. TAG DISCONNECT SWITCH WITH
LOCKOUT TAG.
!
WARNING
AFS Troubleshooting
1. Make sure the furnace blower is not operting, the rocker
switch is OFF, and the circuit breaker is turned OFF or the
cord is disconnected.
2. Remove the access door.
3. Remover power tray assembly.
4. Locate the AFS. It is the circuit board with a small gray disc
connected to the circuit board by two (2) silver wires.
Carfully bend the thermistor so that it is located in the center
of the opening and approximately 1/8” (3 mm) from the
inside edge of the power pack assembly.
5. Reinstall the power tray assembly and access door.
High Altitude Operation
Because the air is less dense at higher altitudes, there is a possibility
of nuisance arcing. The homeowner can quickly and easily correct
this condition.
1. Turn the unit OFF. Turn off circuit breaker or disconnect the
power cord.
2. Remove the two screws that secure the cover to the power
tray and remove it from the unit. (The entire power supply
tray may be removed from the cabinet by removing two
screws from inside cabinet.) Do not lose these screws.
EACB