MAINTENANCE
For efficient operation, the filters must be
changed on a regular basis. If you notice a
reduction in air flow from the system, check the
filters.
Replacing the HEPA Filter and Prefilter
1. To access the filters, turn the Air Cleaner
OFF
at the switch and open the front Filter
Access Door.
2. Carefully remove the filters to avoid spilling of
collected contaminants. Dispose of filters in a
plastic bag and discard with regular
household trash.
3. Remove the plastic from the new filters
before installing. Discard plastic safely. Take
care not to damage the filters. Hold by the
filter frame only.
4. Date the replacement filter in the space
provided.
5. Place the filters in their appropriate track with
the arrows pointing toward the fan.
6. Use genuine replacement filters only. Call the
original installer for parts.
Note: When the filters are new, you may
notice a new smell from the system. This is
normal and will dissipate within a few hours.
Prefilter (#DM900-0855):
This must be
replaced every 3-6 months. A clean Prefilter will
increase the life of the HEPA Filter and improve
airflow.
HEPA Filter (#DMH4-0400):
Replace every 2-3
years. The life of this filter depends on the
amount of contaminants in the air and the
frequency in which the Prefilter has been
changed. Renovations in the home that create
wood, drywall dust or similar contaminants will
shorten the life expectancy of the HEPA filter.
Note: Handle the HEPA filter by the frame
only. The paper is fragile and a puncture or tear
will reduce efficiency.
Replacing the UVC Lamps, PCO Filter and
Final Filter
1. To change the PCO filter, Final filter and UVC
lamps, turn the Air Cleaner
OFF
and
UNPLUG
it. Remove the screws from the
lamp access panel and remove the panel.
DO NOT
misplace the parts.
2. Carefully remove the filters to avoid dusting
of filter. Dispose of the filters in a plastic bag
and discard with regular household trash.
3. To remove the lamp from the lamp socket,
pull the lamp, by the base, away from the
lamp socket. Remove the lamp from the
support clip. Remove the plastic lamp support
clips by pinching the back of the clip and
lightly pulling away from the reflector.
3
Prefilter
HEPA Filter
Filter Access
Door
UVC Lamps
PCO Filter
Final Filter
Lamp Access
Panel
Fig. 1 – Air Cleaner Layout
CAUTION
When replacing the filters wear disposable gloves and a
dust mask.
CAUTION
This unit is not intended for use where there are high
levels of industrial chemicals present.
WARNING
Never use the Air Cleaner without all of the filters in
place and all cover panels and doors closed. Make sure
all the screws are in place.
CAUTION
Make sure to turn the Air Cleaner
OFF
before
performing any maintenance or removing any filters.
WARNING
Make sure the Air Cleaner is
OFF
and
UNPLUGGED
before opening the lamp access panel.
WARNING
Eye and skin damage may result from direct exposure to
the light produced by the lamp used in this product.
NEVER
open the lamp access panel without having
the Air Cleaner unplugged.
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