It is now ready for immediate use. ^Aller Air Industries Model 600 Series Operation and Maintenance Manual AllerAir Industries Inc. Toll free: 1-888-852-8247 / Fax: 1-877-688-3939 AllerAir Industries Inc. 600 Series Congratulations,you are moments away from fresher, cleaner indoor air. Your new AllerAir unit will combat many of the chemicals, gases, odors and particles responsible for poor indoor air quality, and in turn, health concerns such as allergies,asthma, sick building syndrome and multiple chemical sensitivity. As with any air cleaner, proper maintenance of your unit is a vital part of keeping it operating at peak efficiency. WARNING! Before removing the top or bottom of the unit for any reason, always unplug the cord from the power supply. Operation: Most 600 units are shipped fully assembled and ready for use with the exception of the D & DX models which ship with their large carbon filters in a separate box.This is done to safeguard your unit during shipping.To insert the filter, refer to the Filter Assembly-600 D, DX diagram. Please plug units into a 120V-15amp outlet. For best results, situate your unit close to your sitting, sleeping or work area.The units equiped with a variable speed control -Turn knob to the right to adjust to your safistaction- Note: Please save your packaging. Original packaging will be required for all Maintenance: 600 Series FiEPA Filter (Model 600 HEPA2" or HEPA 3") ■ Change the HEPA filter every 3 - 5 years or after a noticeable decrease in air quality. Pre-Filter (Model 600 Prefilter) ■ Change or vacuum the pre-filter every 2 - 4 months depending on the dust level in the area of use. Corbon Filter (Model 600 Carbon Filter) ■ Change the carbon filter after 2 years or after a noticeable decrease in air quality. July 23,2007 REPLACING FILTER ASSEMBLY- 600 Series Step 1 Turn Power Off and unplug receptacle. Lay unit upside down. Step 4 Remove base by gently pulling on the wheels. Step 7 Replace filters with new ones then reassemble by inserting the Carbon filter first then the HEPA filter. Step 2 With a #2 Philips screw driver, remove the four screws from the bottom of the unit. Step 3 Gently grasp wheels. Step 5 First remove the HEPA filter by placing thumbs on the inner side of the filter. Then pull up gently until totally out. Step 6 Than remove the Carbon filter by placing thumbs on the inner side of the filter. Then pull up gently until totally out. Step 9 Step 8 With a screw d river, place 4 Place lid back to its proper position screws back into their positions. by aligning the arrow with the rear Gently return the unit into seam. upright position....