SECTION DUST COLLECTOR

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Maximilian Knight
5 years ago
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1 PART1-GENERAL 1.1 DESCRI PTION A. Provide labor, materials, equipment and services to perform operations required for the complete installation and related Work as required in Contract Drawings. 1.2 SUBMITTALS A. Submit shop drawings and curves on air flow external static pressure, sound data for the entire dust collector silencer combination. Fan curves alone are not acceptable. And also provide documentation on accessories, Operations maintenance and instruction manuals and any other data to describe the unit. 1.3 GENERAL REQUIREMENTS A. Capacity, size and arrangement, static pressure, brake horsepower, component parts and accessories as called for and lor as necessary to obtain required results and allow for proper maintenance. Ratings based on tests made in accordance with AMCA Standard 210. Each size fan to be supplied shall be tested in the manufacturers laboratory under simulated installation conditions. Guaranteed full capacity delivery through duct systems finally installed and under conditions listed. Guaranteed sound-power level ratings not exceeding those of design equipment, or as scheduled. Equipment statically and dynamically balanced to acceptable tolerance with weights permanently fastened. B. Motors: Furnished with fan. Horsepower and type as called for. C. Drive: 1. Direct drive as called for. PART 2- PRODUCTS 2.1 GENERAL A. Furnish and install, were shown on the plans, a high efficiency filter type dust collector with integral blower sized for design air flow of 4800 WG EXT.SP. B. Dust collector shall be self-cleaning fabric type complete with cotton filters, backward C. Inclined blower, motorized shaker, factory wired controller and external discharge silencer. Manufacturer's literature shall state that dust collector and selected filter Spacing is designed for the collection of wood dust. D. Dust collector shall be airtight, all steel construction with sealed seams and gasketed quick opening doors with "V4 turn knobs. Housing shall be minimum of 14- gao mild steel

2 E. Unit shall consist of a filter section, with sloped roof to shed rain and a funnel bottom section without slide gates or doors to allow down flow of dust directly into (2) 55-gallon drum assemblies furnished by manufacturer. When the 55 gallon drums are furnished the inlet shall be centered between the drums so that wood waste is deposited in both drums. Designs where the inlet is located above one of the drums is not acceptable. Include an explosion relief vent, in the dirty section of the filter housing, per NFPA #68 and #644. F. Interior and exterior carbon steel surfaces shall be primed with two part epoxy and exterior finished urethane enamel paint. 2.2 FILTER SECTION A. Unit to include multi-pocket filter modules, each of which is sewn from one (1) piece of 8-1/4 ounce cotton sateen fabric designed to deliver in excess of 99.5% efficiency by weight on industrial dusts. The filter modules shall have rigid insert separators to prevent collapse of filters and loss of the effective filter area. Flat shaker fingers located at the bottom of the filter modules, shall prevent adjoining pockets from touching one another and blanking off. The filter pocket spacing shall be of the wide spacing type (1-1/2 in.) to permit the collected dust to be shaken off the outside of the filters freely and recommended by the manufacturer for the collection of sawdust. Paper cartridges (any derivative), fabric media, or with narrow spacing or filter that collect the dust on the inside of the filter pockets will not be accepted. B. Each filter module shall be secured in place by two lever, operated over-center, Locking mechanisms to assure a positive seal and allow for easy removal of filters from outside of unit, without tools. Designs, which require entry into unit (confined space), for filter maintenance, are not acceptable. C. Filter Cleaning: 1. Filters will be cleaned automatically after a fifteen second delay following the Shut down of the blower, by the oscillating actions delivered by the motorized Eccentric driven shaker assembly, which imparts a vibratory force throughout the entire surface of each individual filter pocket to dislodge the dust. Shaker motor shall be 1/3 HP. D. If dust collector is recirculating air back to building, the system should include an after filter section with less than % of 1 % by pass or leakage or air around the housing and include a MERV 11 section and a Hepa Filter section or the dust collector shall include an after filter housing built into the collector with Hepa Filter rated for 99.97%@.3 microns

3 2.3 BLOWER SECTION A. The integral non-sparking AMCA direct drive blower shall be located on the clean air side of the filters top mounted at the factory and be backward inclined design with a dynamically balanced impeller. It shall be driven by a 15 HP, 208V,3, PH,3450 RPM TEFC motor. The blower shall be licensed to bear the AMCA seal and be tested in accordance with AMCA Standard 210 and comply with the requirements of the AMCA Certified Air Performance Ratings Program. A factory-supplied cover shall protect the motor cooling fan from ice. B. An external field supported duct silencer fabricated with 4.75Ib. density inorganic mineral or glass fiber shall attenuate discharge noise from the blower. This media shall be protected from erosion by the airflow through the use of galvanized perforated metal with aerodynamic leading and trailing edges to insure maximum acoustical insertion loss at minimum static pressure drop. Lining of the fan scroll, instead of an external silencer, shall not be accepted. Include factory installed bird screen on discharge of silencer if air is not recirculated. 2.4 CONTROL A. Operation of the automatic shaker shall be controlled by a solid state, dual mode timer with adjustable shaker cycle range from seconds. Magnetic starters with overload relays for the blower and shaker motor and control transformer shall be factory wired in NEMA 4 control panel mounted on the unit for a single point wiring. Also included shall be a push button station for remote mounting. Unit supplied with factory wired and mounted NEMA 3R fused disconnect. Unit rated at 208 Volt- 3 Phase. B. The control pane wiring shall be either UL or ETL labeled for compliance with 508A. A certified UL or ETL representative, prior to placing equipment in operation, shall label control panels not labeled by dust collector manufacturer, in field. C. Pressing start button activates blower. Pressuring stop button deactivates blower. After a delay of 15 seconds (to allow blower to coast to a stop) the automatic shaker is activated and remains on until timer of shaker motor runs out. D. Factory mounted disconnect E. If Air flow of the system is greater than 5000 cfm and air is recirculated back to the building: 1. The return duct shall include an abort gate damper controlled by the spark detection system controller

4 2.5 SPARK DETECTION AND EXTINGUISHING SYSTEM A. Control Panel shall be the FLAMEX FLE 3000 Single Zone Console, Incoming Power requirement shall be 120/60/1. The panel shall include One (1)-12V 2.5H Battery to provide emergency back-up power for a minimum of 24 Hours to the panel in the event of loss of incoming power. The Panel shall be housed in an I P-54 Enclosure and must be installed in a dry heated area. B. Provide Two (2) Infrared Spark Detectors capable of detecting IR in.78 to 1.2 micron range. Sensors must be housed in a metallp 65 enclosure and come complete with Stainless Steel mounting hardware. Sensors must be easily removable from the duct for maintenance inspections. Detector Lens must be removable and replaceable if damaged as well as horn and strobe. C. Provide One (1) Extinguishing Assembly complete with 12 VDC Solenoid Valve, Brass Y Strainer with Stainless Steel Screen, and Ball Valve with Locking Strap, Lock and Key. The Solenoid Valve shall be the slow closing type to eliminate water hammer. A Stainless Steel Directional Spray Nozzle shall be provided as part of this Assembly, which will produce a 180-degree Fan Shaped Spray Pattern, Stainless Steel mounting hardware of Nozzle shall also be provided. The Extinguishing Assembly must be capable of flowing a minimum of 17 GPM at 44 PSI flowing pressure at the Solenoid Valve during discharge. D. If the air flow is greater than 5000 cfm and air is recirculated back to the Building: 1. The return air duct shall include a fast acting abort gate controlled by the spark detection system controller E. The spark detection System shall be Factory Mutual Approved, and installed consistent with the Manufactures recommendations. F. Provide dust switch interlock on all wood working devises so that energizing any of the wood wording machines energizes the dust collector. This dust switch shall then allow the collector to run for a full 30 sec -3 min after the wood working equipment has been de-energized to clear the system or debris 2.6 DESIGN MAKE A. Dust collector shall be Sternvent Vibraclean Mode DKPD or approval equal. Makes, Sternvent, Torit, AAF

5 PART 3- EXECUTION 3.1 I NST ALLA TION A. Provide equipment in accordance with manufacturer's instructions and compatible with intent of the respective system performance requirements. B. Provide all associated ductwork, final connections and duct supports as required. C. Test collector and dust system for operation. 1. Provide balance and test reports. D. A provision shall be made for all low voltage wiring for the complete operation of the system from control panel of spark suppression system to optical eyes and to spray solenoid. HVAC contractor shall provide all interconnecting wiring required for operation of the Flamex system. Refer to manufacturers wiring diagrams for wiring required. Refer to for further detail of wiring and routing. 120 V power to the control panel shall be by the Electrical contractor. E. Contractor will coordinate with plumbing trades to have a water line installed to feed spray nozzle of extinguish system. Water line should not be connected to fire protection sprinkler system. END OF SECTION

SECTION AXIAL HVAC FANS

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