PREINSTALLATION>Air FlowFurnace /OpeningFurnaceNot to Exceed 20j J_Transition Section(if Needed)m©Frn(_:]Air Flow_. Electronic, Air CleanerOpeningElectronicAir CleanerFigure 3LOCATING THE AIR FILTERYour air filter must be mounted in the return air duct of acentral forced-air system, on the air entering side of yourfurnace. (See Figure 3 for example.)Select a location that meets the following:1. The face of the cell will be at a right angle to the airstream.2. Allow the following clearances to permit removal ofcells and pre-filters: (See Figures 4 and 5)Model SST1000 - 14 inchesModel SST1400 - 15 inchesModel SST1600 - 14 inchesModel SST2000 - 15 inchesFor complete dimension data refer to Figure 5.3. The air filter is not to be placed in the discharge ofeither the heating or cooling unit.4. IMPORTANT: If atomizing spray type humidifier isused, it must be installed downstream from the airfilter.5. Ifthe air cleaner has a powercord installed, unitmustbe located close enought to the outlet so connectioncan be made without the use of an extension cord.If your furnace duct system has a pre-installed boot,discard front cover of boot and slide the air cleanercomponent inside the boot. For installation of Air CleanerRetrofit (ACR) kits, see page 13.If furnace opening cannot be enlarged to required size, atransition sheet metal section must be used. Transitionmust be planned for each job. Reduction should not bemore than 4 inches per linear foot, approximately 20angular degrees (Figure 3).(Interchangeable) (Interchangeable)Collecting Cell Collecting CellCabinet I Outlet Box I Power Pack1 _ HandleContactButtonPre-Filters Contact(Interchangeable) ButtonFigure 4See text for CellRemoval Clearance,/6 7/8"Knockouts for3/4" Conduit(three sides)MODEL NO. A B C D E FSST1000 24 3/4 21 5/16 18 5/8 13 9/16 16 7/16 19 1/16SST1400 2911/16 261/4 235/8 139/16 167/16 191/16SST1600 25 1/2 21 5/16 18 5/8 17 3/4 20 5/8 23 3/8SST2000 2911/16 261/4 235/8 173/4 205/8 233/8Figure 5DIRECTION OF AIR FLOW THROUGHTHE AIR CLEANERYour air cleaner is shipped from the factory with airflowfrom left-to-right. If this air flow is suitable for theinstallation, no further changes need to be made (Fig-ure 4). For right-to-left air flow, remove both pre-filterand cell sections. Turn cells upside down (with thesame end facing the cabinet opening). This will locatethe ionizing wires at the right, and both contact buttonsand cell handles will be facing the power door. Air flowdirection must agree with arrow embossed on end ofcollecting cells.After installing the cell sections, install pre-filters in cabinettracks on the right. This will again place the pre-filters onthe air entering side (on the same side as ionizing wires).