NEC UM351W User Manual page 137

3. Remove the four filters and use a vacuum cleaner to vacuum
all the dust inside and outside.
Get rid of dust in the sponge filter
NOTE:
• Whenever you vacuum the filter, use the soft brush attachment to
vacuum. This is to avoid damage to the filter.
• Do not wash the filter with water. Doing so can result in filter clogging.
4. Remove dust from the filter cover and the two filter cases
(large and small).
Clean both outside and inside.
5. Attach the four filters to two filter cases (large and small).
• Attach the coarse-texture sponge filter to the outside of filter
case.
The coarse-texture sponge filter has slits on it. Align these slits
with the protrusions of the filter case.
• Attach the fine-texture sponge filter to the inside of the filter
case.
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7. Maintenance
Slit
Slit