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41773-01 10
Air Purifier Maintenance
6. Place the front grill back onto the unit. First, line up the tabs on the bottom of
the grill with the openings on the purifier base and then push the top of the
grill forward until it is closed. Refer to Figs. 2 and 3 (pg. 4). 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. 7). 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 in the recesses on either side of the
top of the grill and pull firmly. Refer to Figs. 2 and 3 (pg. 4).
3. Gently pull on the filter to remove it from the unit. While removing the filter,
note the directional arrows printed on the top of the filter. The new filter will be
installed with the same orientation. Once removed, the used filter can be dis-
carded.
4. Remove the new filter from its wrapping and look at the directional arrows
printed on the side of the filter. Install the filter with arrows pointing towards
the unit. Press the filter firmly into the air purifier. To avoid damaging the
filter media, you should press on the frame of the filter only.
5. Place the front grill back onto the unit. First, line up the tabs on the bottom of
the grill with the openings on the purifier base and then push the top of the
grill forward until it is closed. Refer to Figs. 2 and 3 (pg. 4). NOTE: This
unit will not operate unless the grill is in the correct position.
41773-01.pmd 4/15/05, 10:54 AM10