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11 41781-01
Air Purifier Maintenance
Fig. 9
PRE-FILTER
HOOK
TAPE
HOOK
TAPE
6. Place the front grill back onto the unit. First, line up the tab on the bottom
of the grill with the recess on the purifier base and then push the top of the
grill forward until it is closed. Refer to Figs. 6 and 7 (pg. 7). NOTE: This
unit will not operate unless the grill is in the correct position.
7. Plug in the air purifier.
8. To reset the counter to zero hours and turn off the indicator, simply press
and hold the PRE-FILTER RESET key for three seconds. Then, you must
release the reset key and then press and hold the pre-filter reset key again
for three seconds to turn off the filter indicator.
Changing the Filter
When the filter exceeds 8000 hours (approximately 12 months of use), the Filter indicator
will turn on as a reminder that you should replace the filter. (Refer to Filter Life Counters
for additional information, pg. 8.) This is a reminder that you should check the filter and
replace if necessary. The proper time to change the filter depends on usage and the environ-
ment. Use the following list to help determine if the filter should be changed:
• Compare the color of the filter to the color coded chart on the inside of the housing. If the
filter color matches the darkest color on the chart, you should replace the filter.
• If you notice a decrease in air output or an increase in noise at any time during normal
operation, the filter may be clogged. Replace the filter to return to normal operation.
Continued
41781-01_rev 12.08.05B.pmd 12/8/05, 10:46 AM11