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11 41792-01
Air Purifier Maintenance
Fig. 11
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. Finally, reset the Pre-Filter Counter by pressing the PRE-FILTER RESET
key for 2 seconds. The Pre-Filter Counter will return to 100% and the Pre-
Filter indicator will stop flashing.
Changing the Filter
When the filter exceeds 2800 hours (approximately 4 to 6 months of use), the Filter Life
Counter will display 0% life remaining and the Filter indicator will flash (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
environment. 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.
To change the filter and reset the Filter Life Counter:
1. First, turn off and unplug the air purifier.
2. Next, remove the front grill. Place your fingers under the handle on the grill and pull
forward, then up. Refer to Figs. 4 and 5 (pg. 6).
Continued
41792-01_rev 08.02.05.pmd 8/2/05, 4:24 PM11