Replacing The 24 V Transformer
(A/ GSAS-12 and A/ GSAS-18 only)
Before replacing 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. 6.
3. Cut the primary leads (to the APS) close to the
transformer.
4. Remove the 2 hex head nuts from the transformer
studs.
5. Remove
transformer.
6. Place new transformer over studs and re-install 2
hex head nuts to lock into place.
7. Connect secondary leads (white) to the 24 V
terminals on the power board.
8. Wire nut primary leads from APS (cut in Step 3) to
primary leads from transformer.
9. Replace power box cover.
10. Turn on power to the Air Cleaner and test.
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 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.
5. Measure the voltages at HV1 and HV2 (where
applicable) on the power board. See Fig. 8
6. Adjust the HV ADJ potentiometer until the voltage
reading matches the voltage in Table 2.
7. Turn
OFF
the Air Cleaner.
8. Remove the high voltage meter.
9. Replace the power box cover.
10.Turn
ON
the Air Cleaner.
Table 2 — Power Board Voltage Settings
Model
Maximum Voltages on
Plates (K VDC)
Maximum Voltage on
Ionizer (K VDC)
ASAS-10ASC, ASAS-11ASC
GSAS-10ASC, GSAS-11ASC
6.2 - 6.5 (HV1)
6.2 - 6.5 (HV1)
ASAS-12ASC, ASAS-18ASC
GSAS-12ASC, GSAS-18ASC
4.8 - 5.2 (HV1)
7.2 - 7.8 (HV2)
Fig. 8 — Testing Voltage At Power Board
Fig. 9 — Testing Voltage At Cell
High Voltage Probe
Probe
Safety Interlock
Grounded
Area
Probe
Screwdriver
