SECTION I GENERAL DESCRIPTION

Contractor shall furnish and install the AAF-OSV self-contained blower and pre-wrapped cartridge filtration module per plans. The unit shall be an AAF-OSV as supplied by AAF International of Louisville, Kentucky, USA, or approved equal.

The unit shall consist of one each; cylindrical filtration module, motor blower module, with on/off control. The extractor shall be completely factory assembled as a self-contained unit. Each extractor shall be neatly painted with a durable hammered finish powder coat, performance tested including a hi-pot test required by ETL/CSA and properly packaged for shipping. Both filtration and blower module must be the product of the same manufacturer to insure undivided responsibility and simplified servicing. Extractor precision sheet metal fabrication shall be produced in an ISO-9001 compliant facility, and the completed packaged unit shall bear ETL/CSA Labels.

SECTION II. EXTRACTOR CAPACITY RATING

The capacity of each unit at a nominal rating shall be to produce continuously 3500 actual cubic feet per minute of airflow. Maximum free air delivery with a new cartridge shall be at least 4800 cubic feet per minute of airflow. The fan wheel is a 15” airfoil, backward inclined, non-overloading high efficiency spark resistant type. The fan wheel is constructed and tested to AMCA section 210-211 standard. The motor shall be: 5 HP,  3450 RPM, 208v/13.2A, 230v/12.2A, 460v/6.1A, 575v/5.8A, 3 Phase, 60HZ. Primary filter cartridge: pleated composite cellulose, at least 400 square feet, 99.9% efficient at .3 micron particulate size.

SECTION III. EXTRACTOR SIZE AND DESIGN

Extractor shall be of a downflow design with filter, inlet cone, fan and motor aligned vertically in the same plane. Total dimensions are not to exceed 40” length, 26” width, and 67” height. The top mounted 14” diameter intake and cyclonic separator is designed to extinguish sparks and distribute airflow evenly across the filtration media. A vertically centered threaded rod and locking nut provide gasket compression on the filter element. The extractor will have a minimum of 25 sq. feet of 1” thick class one acoustical lining.

Total extractor noise shall not exceed 74 DBA @ 3 ft. The extractor will make use of stamped convection louvers in the side panel to enhance heat transfer away from the motor. The housing frame, filter pedestal, and side panels will be 12 ga. steel welded construction. The side panels themselves are situated to provide access to two sides of the fan wheel, motor, and electrical fittings.

The top discharge silencer provides directional correctional attenuation of high frequency blower noise.

SECTION IV. EXTRACTOR FITTINGS AND  CONTROLS

All junctions, connectors, leads, and strain relief grommets are ETL/CSA recognized components. Extractor controls shall be an on/off operation type. The motor starter shall be equipped with thermal overload and under voltage protection.

Control Box shall be panel mounted and so located on the extractor to provide ease of servicing and use.

SECTION V. TESTS

A QC inspection of the extractor shall include physical inspection of the finish, the shaft, fan, key way, cone alignment and motor mounts. A trial under power shall be performed to test controls and proper fan rotation. A test of the acoustical lining for adhesive performance shall be performed. The primary filter cartridge shall be inspected for gasket seal, pleat seal, end cap damage, tears or pin holes. A final alignment check of cartridge, pre-filter wrap for proper position on pedestal shall be performed, and the filter assembly properly fastened to a threaded center post prior to shipment.

SECTION VI. OWNER’S MANUAL

Instructions for installation, operation and maintenance of the extractor shall be contained in a manual provided with each extractor unit.

A wiring diagram corresponding to the extractor model shall be included in the Owner’s Manual.

SECTION VII WARRANTY

The extractor shall have a one year (12 months) material and workmanship warranty. All other components are covered by a one year (12 months) manufacturer’s warranty.