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manual abstract
They are designed for use with residential and light commercial forced-air heating and/or cooling systems and can be installed in a vertical or horizontal section of a typical return air duct system. The electronic components of the unit convert the 120 VAC of the power supply to 7200 VDC which imparts an electrical charge to airborne particles such as smoke, bacteria, pollen, and dust. These charged particles are then attracted by the dust-collecting media, thus purifying the airstream. The electronic air cleaner consists of: 1. A cabinet containing the air cleaning assembly. 2. A power door assembly. See Figure 2. CABINET. A casing encloses three sections that make up the air cleaning assembly. These sections are: 1. Mechanical prefilter. An expanded metal first-stage filter that removes lint and larger dust particles. 2. Ionizer section. Consists of tungsten wires (that receive a positive charge) mounted between grounded steel channels and supported by polyester, glass-reinforced insulators. 3. Collector section. Consists of two grounded wire grills and one center plate (that receives a positive charge) with two fiber glass dirt collecting “media” pads, one on either side of the center plate. See Figure 11. POWER DOOR ASSEMBLY. See Figure 10. The door assembly consists of: 1. A power indicator light, ON-OFF switch, find lock knob installed on the door cover. 2. A door base plate contains an encapsulated power pack, a surge resistor, and wiring that are mounted internally. A line voltage disconnect (male plug) and high-voltage spring bus-bar is mounted on the base plate externally. Six screws must be removed to expose the power pack and wiring. Power Pack. The supply circuit to the power pack, which is wired across the system air blower, is controlled by an ON-OFF power switch. With the power switch ON (assuming power door locked and air Cancels: 39907D6 I 39907D7 8/15/72 r-ßt FILS .... Fmnrp j—The Model 907 Electronic Air Cleaner COP DO NOT KEMOVB GROUNDED PLATE REPLACEABLE COLLECTING PAD POSITIVELY CHARGED GRID REPLACEABLE COLLECTING PAD GROUNDED PLATE IONIZER PREFILTER DUST-LADEN RETURN AIR INDICATOR LIGHT Figure 2—Air Cleaner Components -I 1 4 ELECTRICAL ENTRANCE i- ./v,T Æ«VÎ , ;j ,V & !■; Ö ? ;■> • *P? '¿r-. -I 4|[- ON- OFF/ SWITCH REMOVABLE A POWER Li DOOR 31- \ INDICATOR LIGHT A70003 Figure 3—Dimensional Drawing TABLE I—DIMENSIONS Model A C D E 12-907 31-1/4 20-3/16 17-11/16 24“ 16-907 31-1/4 25-11/16 23-3/16' 24 ': '■ 24-907 33-1/4 31-3/16 28-11/16 26 TABLE II—PHYSICAL DATA Model 12-907 16-907 24-907 Air Volume Range CFM 600-1200 800-1600 1400-2400 Filter Area Face area sq ft 3.37 4.36 5.76 . Nominal size in. 18x25 24 x 26 30 x 28 Electrical Data Input (to power door) 120 volts AC, single phase, 60 Hertz Output to unit 7200 volts DC, 1,7 Milliamps Approx Shipping Weight lbs 48 54 - 61 TABLE ill—PRESSURE DROP AT VARIOUS AIRFLOWS 12-907 16-907 24-907 CFM Pressure Drop Inches wc CFM Pressure Drop Inches wc CFM - Pressure Drop ■ ■ ■ ■ Inches wc 600 0.05 800 0.05 1400 0.09* 700 0.07 1000 0.08 ' 1600 0.12 ■ ■' 800 0.085 1200 0.11 1800 0.45 ' 900 0.107 1400 0.15 , 2000 ... . , 0.18. , 1000 0.13 1600 0.19 2200 , ... . . 0.22 1100 0.16 2400 .0.26. .. 1200 0.19 Note: Using the electronic air cleaner on air duct systems designed for airflows lower than 600 CFM for Model 12-907, 800 CFM for 16-907, and 1400 CFM for 24-907 is not recommended. 12/16/24/907 -2- blower operating), 120-VAC±10% single phase, 60-Hz current is applied to the power pack transformer. The output of the transformer secondary is approximately 3600 VAC and alternately charges two capacitors through two silicon rectifiers. The total charge across both capacitors results rh‘ a power pack output of approximately 7200 VDC; therefore, the circuit is classed as a voltage doubler circuit. NOTE: Power packs are completely encapsulated and not field repairable. The surge resistor is external to the power pack and can be readily replaced in the field. Installation of the Model 907 consists of the following steps (sections): I. Locating the Unit II. Connecting the Air Ducts III. Making Electrical Connections IV. Start-up and Adjustment In addition, the following sections are also included: V Maintenance VI. Recommended Service Procedures IMPORTANT—Read Before Installing 1. Check local codes and ordinances for additional requirements pertaining to installation of unit. 2. Check electrical power supply to building to be sure rated voltage, frequency, and phase correspond to that on unit rating plate. 3. Because Model 907 cleans only air brought to it by system blower, run blower continuously, or as much as possible—summer and winter. 4. Do not block air outlets and returns with draperies or furniture. A68176 A68177 Figure 4—Typical Upflow Furnace Installation Figure 5—Typical Basement Furnace Installation TRANSITION TO ACCOMMODATE Figure 6—Typical Dow...