Testing Voltage Of Power Board; Testing Voltage At Cell; Setting Approximate Voltage With High Voltage Meter; Testing Cell For Bad Contacts - Five Seasons FSGM20AS-A-2 Owner's Manual

Testing Voltage Of Power Board

Voltage on the power board may drop below required
level when installation area is too damp, too cold, or if the
humidity is too high. 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 electrical compartment cover.
3. Connect the ground of the high voltage meter to the
ground stud of the power board.
4. Turn ON the Air Cleaner and wait 5 minutes before
checking voltages to allow voltages on cells to
stabilize.
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 1.
7. Turn OFF the Air Cleaner.
8. Remove the high voltage meter.
9. Replace the electrical compartment cover.
10. Turn ON the Air Cleaner.
Table 1 — Power Board Voltage Settings
Model Maximum Voltages on
Plates (K VDC)
FSGM20AS-A-2
4.6 - 4.8 (HV1)

Testing Voltage At Cell

1. Turn off power switch. Open access door to Air
Cleaner. Remove prefilters from track.
2. Close access door to air cleaner. Remove one of the
grilles from in front of each cell.
3. Remove the electrical compartment cover.
4. Attach the ground of the high voltage meter on to a
grounded area of the cell.
5. Place the tip of the high voltage probe on the cell wire.
6. Turn the air cleaner on.
7. Wait until the voltage stabilizes, then take a reading.
Adjust the HV ADJ potentiometer until the voltage
reading matches the voltage in Table 1. If the voltage
fails to stabilize or jumps up and down by more than
100 V, there may be a bad contact in the cell or a bad
contact between the cell contacts and the high voltage
contacts on the contact tray.
8. Test the voltage in both cells. They should read very
close to the same voltage.
9. Turn the air cleaner off. Replace the grilles, electrical
cover and prefilters.
10. Turn the air cleaner on.
Setting Approximate Voltage Without High Voltage
Meter
A high voltage meter should be used. If one is not
Maximum Voltage on
Ionizer (K VDC)
7.0 - 7.3 (HV2)
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 electrical compartment cover.
2. Turn the HV
counterclockwise. Air Cleaner may arc or snap at this
point.
3. Turn the HV ADJ potentiometer clockwise slowly until
the arcing and snapping stops.
4. Replace electrical compartment cover.
Testing Cell For Bad Contact
1. Turn off power switch. Open access door to Air
Cleaner. Remove prefilters from track.
2. Close access door to air cleaner. Remove one of the
grilles from in front of each cell.
3. Turn the air cleaner on.
4. Place a screwdriver between plates of the cell. There
should be an initial snap when the plates are shorted,
then no sound. If a hissing or ticking occurs, then
there is a bad contact either between the cell and the
high voltage contact or the contacts within the cell.
5. Test the ionizing wires by the same method, shorting
the wire to the grounded extended plate of the cell.
6. Turn the air cleaner off. Remove the cells and check
to see if the copper contacts along the bottom of the
cell channel are free.
7. With an ohmmeter, check continuity between the top,
outside disc contact and the first plate on the opposite
side of the cell. The reading should be close to 0
ohms. If not, bend the contact to touch the plate.
5. With an ohmmeter, check continuity between the top,
center disc contact and one of the ionizing wires. The
reading should be close to 0 ohms. If not, bend the
contact to touch the ionizing bar.
6. Replace grilles, prefilters and cells. Turn on the air
cleaner.

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, as well as spring and
S-hook. If necessary, cell may be used temporarily
with one wire missing until a replacement is received.
4. Using needle-nose pliers, place spring hook in the
hole of the ionizing bar near cell top.
5. Place eyelet of wire over the S-hook and place S-
hook into hole on ionizing bar on other side of cell.
Keep wire tight to ensure S-hook remains in hole.
6. Using the needle-nose pliers, grab the end of the
spring and stretch towards loop in wire. Place eyelet
in wire over spring hook and release spring. See Fig 3
7. Install cell in Air Cleaner.
8. Return power to Air Cleaner.
9. Test cell for proper operation.
ADJ potentiom eter fully