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9) or Changing the Filter (pg. 10) for instructions on how to reset the counters. Locking/Unlocking the Keypad Once you enter the desired speed, you may want to lock the keypad to prevent accidental changing of the speed. When the keypad is locked, all keys will be disabled. If you press a key, the Keypad Locked Indicator will be displayed on the screen for 1-2 seconds. To Lock or Unlock the Keypad: 1. To lock the keypad, press and hold the UP/DOWN keys simultaneously for 2-3 seconds. The Keypad Locked Indicator will appear on the display. Refer to Fig. 6. After releasing the keys, the Keypad Locked Indicator will disappear. 2. To unlock the key pad, press and hold the UP/DOWN Fig. 6 keys simultaneously for 2-3 seconds. The Keypad Indicator will disappear and the keypad will be functional. 7 41773-01 41773-01.pmd 7 4/15/05, 10:54 AM Operation Resetting the Air Purifier In the unusual situation that the unit or the display is exhibiting erratic behavior, you may want to reset the air purifier. If you still have problems after resetting the air purifier, please contact Hunter for additional assistance (refer to Technical Assistance, pg. 12). To Reset the Air Purifier: 1. Unplug the unit for at least 30 seconds. 2. Plug the unit back in. Using the Ionizer Using the ionizer improves the quality of air in the room. Negative ions are released into the air and positively charged dust, smoke, and pollen particles are attracted to the negative ions. These particles settle out of the air and can be vacuumed up during normal cleaning. These particles are also more easily captured by the HEPAtech® filter as they pass through the HEPAtech® Air Purification System. To ensure the best air circulation in the room, we recommend that you place your air purifier six (6) inches away from any walls. To turn the ionizer on or off: 1. To turn the ionizer on, press the IONIZER key. The Ionizer Indicator will appear on the display. Refer to Fig 7. 2. To turn the ionizer off, press the IONIZER key. The Ionizer Indicator will disappear. Fig. 7 41773-01 8 41773-01.pmd 8 4/15/05, 10:54 AM Air Purifier Maintenance Cleaning Your Air Purifier Proper maintenance of your Hunter Air Purifier will help ensure years of trouble free service. Follow these steps to properly maintain your air purifier: 1. Approximately every 90 days, the outside of the unit should be cleaned with a soft, damp cloth. 2. If needed, the front grill can be removed from the unit and cleaned with soapy water. Simply remove the pre-filter before exposing the grill to water. 3. Follow the instructions in Changing the Pre-Filter and Changing the Filter (pgs. 9 and 10) to determine when and how to replace the filters. NOTES: •The air purifier must be unplugged during the cleaning process. • Be sure the unit is completely dry before plugging in and using. •Never immerse unit in water. Changing the Pre-Filter When the Pre-Filter exceeds 1400 hours (refer to Filter Life Counters for additional information, pg. 7), the Pre-Filter Life Counter will display 0% life remaining and the Pre-Filter indicator will flash as a reminder that you should replace the pre-filter. To maintain proper odor-removing capability and overall filtration performance, the pre-filter should be changed every 1400 hours (approximately 3 months of use). If necessary, the pre-filter can be changed more often. Proper maintenance of the pre-filter will help extend the life of the HEPAtech® filter. Refer to Obtaining Replacement Filters (pg. 11) if you need help finding replacement filters. To change the pre-filter and reset the Pre-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. The pre-filter is attached to the inside of the grill with hook tape. Pull gently on the pre-filter to remove it. Refer to Fig. 3 (pg. 4). 4. If needed, use a soft damp cloth to wipe off the grill. 5. Install the new pre-filter by placing it in the grill and pressing gently on the prefilter so that it adheres to the hook tape. You may notice a few black particles coming off the pre-filter. Those particles are part of the odor-removing activated carbon and will be collected on the filter during regular use. Continued 9 41773-01 41773-01.pmd 9 4/15/05, 10:54 AM 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 (approx...
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