GeneralAire GA52F32 - Manual (Page 6)

Guide.
e. Check the APS to make sure that it is functioning
correctly.
f. Check the transformer to make sure power is
being supplied to the power board.
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.
Replacing Performance Light
Before replacing power board, turn power to the Air
Cleaner OFF at the source.
1. Remove the electrical compartment cover.
2. Disconnect the performance light wiring connected to
the terminals on the LED.
3. Push the light out through front of the switch bracket.
4. Push the new light into the bracket.
5. Connect the wiring to the LED terminals. The leads are
polarity sensitive. The yellow lead goes on the terminal
with the red mark.
6. Replace cover.
7. Return power to Air Cleaner. Test light.
Replacing A Power Board
Before replacing power board, turn power to the Air
Cleaner OFF at the source.
1. Remove the electrical compartment cover.
2. Disconnect wiring from the LED, HV1, HV2 and 24 V
terminals. Note which terminals the wires belong.
3. Remove the hex nut from the power board.
4. Release the power board from the 3 plastic board
spacers, by pinching the end of the spacers and
pulling the board out.
5. Push new board onto spacers. Make sure spacers
click into place to hold down board.
6. Screw on the hex nut saved from Step 3. Ensure the
star washer is in place over the steel spacer for proper
grounding.
7. Reconnect wiring to LED, HV1, HV2, and 24 V
terminals on the new power board.
8. Replace electrical compartment cover.
9. Return power to Air Cleaner. Test power board.
Note: Although the power board has been set before
shipping, it may be necessary to reset the voltage to the
correct load for optimum efficiency. Refer to Testing
Voltage At Power Board section for more information.
Testing The 24 V Transformer
1. The Air Cleaner should be OFF. The system fan
should be running. The access door should be closed.
2. Remove electrical compartment cover.
3. Disconnect the leads of the 24 V transformer from the
power board.
4. Turn the Air Cleaner ON. Measure voltage across
leads with a voltmeter. Voltage should read 24 - 28
VAC.
5. If no voltage present, check operation of the APS.
6. Before replacing the transformer, check the resistance
across the power board 24 V input terminals, 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.
7. Reconnect leads to power board.
8. Replace electrical compartment cover.
Replacing The 24 V Transformer
Before replacing 24 V transformer, turn power to the
Air Cleaner OFF at the source.
1. Remove electrical compartment cover.
2. Disconnect the secondary leads from the transformer
to the 24 V terminals on the power board.
3. Cut the primary leads (to the APS) close to the
transformer.
4. Remove the 2 hex head nuts from the transformer
mounting studs.
5. Remove transformer.
6. Place new transformer over studs and re-install 2 hex
head nuts to secure 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 electrical compartment 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 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.
6
Model Maximum Voltages
on Plates (KVDC) Maximum Voltage
on Ionizer (KVDC)
GA52F32 4.6 - 4.8 (HV1) 7.0 - 7.3 (HV2)
Table 1 — Power Board Voltage Settings