11 41780-01
Air Purier 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 purier 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 purier.
8. To reset the counter to zero hours and turn o 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-lter reset key again for three
seconds to turn o the lter indicator.
Changing the Filter
When the lter exceeds 2800 hours (approximately 4 to 6 months of use), the Filter indicator
will turn on as a reminder that you should replace the lter. (Refer to Filter Life Counters for
additional information, pg. 8.) This is a reminder that you should check the lter and replace
if necessary. The proper time to change the lter depends on usage and the environment.
Use the following list to help determine if the lter should be changed:
•Comparethecoloroftheltertothecolorcodedchartontheinsideofthehousing.If
the lter color matches the darkest color on the chart, you should replace the lter.
•Ifyounoticeadecreaseinairoutputoranincreaseinnoiseatanytimeduringnormal
operation, the lter may be clogged. Replace the lter to return to normal operation.
Continued