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Home My WebLink About233423 EXHAUST FANS.pdfL’Acquis Number: 12056 ____________________________________________________________________________________________ Matt the Miller's Tavern Carmel, Indiana Project No. 12056 EXHAUST FANS 23 34 23 � 1 SECTION 23 34 23 Exhaust Fans PART 1 � GENERAL 1.01 RELATED SECTIONS: A. Drawings, general provisions of the Contract, including General and Supplementary Conditions, and Division�1 Specification Sections and Division 20 Specification Sections, apply to work of this Section. 1.02 DESCRIPTION OF WORK: A. The Contractor shall furnish all the labor, materials, equipment, appliances, services and drayage, and perform all the operations in connection with the construction and installation of the Work. All Work to be as herein specified and as denoted on the accompanying Drawings. B. This Section of the Work includes the furnishing and installation of the in�line suspended exhaust ventilators, roof�mounted powered exhaust ventilators and direct drive wall exhaust fans, complete with associated ductwork, dampers, etc., as herein specified and/or indicated on the Drawings. 1.03 QUALITY ASSURANCE: A. Units shall be licensed to bear the Air Moving and Conditioning Association, Inc. AMCA) seal for air moving performance shall be tested in accordance with AMCA Standard 210. B. Some ratings listed for specific performances shall be in accordance with methods outlined in AMCA Bulletin 301. C. UL Compliance � Fans shall be designed, manufactured, and tested in accordance with UL 705 "Power Ventilators." D. NEMA Compliance � Motors and electrical accessories shall comply with NEMA standards. E. Electrical Component Standard � Components and installation shall comply with NFPA 70 "National Electrical Code." 1.04 ACCEPTABLE MANUFACTURERS: A. Manufacturers: Subject to compliance with requirements provide exhaust fans of one of the following manufacturers 1. Carnes 2. Greenheck Fan Corp. L’Acquis Number: 12056 ____________________________________________________________________________________________ Matt the Miller's Tavern Carmel, Indiana Project No. 12056 EXHAUST FANS 23 34 23 � 2 3. JenCo Fan 4. Loren Cook Company 5. PennBarry 6. Twin City Fan & Blower 1.05 SUBMITTALS: A. General � Submit the following in accordance with the requirements of Division 1. 1. Product Data � for selected models, including specialties, accessories, and the following: a. Certified fan performance curves with system operating conditions indicated. b. Certified fan sound power ratings. c. Motor ratings and electrical characteristics plus motor and fan accessories. d. Materials gauges and finishes, including color charts. e. Dampers, including housings, linkages, and operators. PART 2 � PRODUCTS 2.01 IN�LINE EXHAUST FANS: A. Belt�driven. B. Unit housing to be heavy gauge steel. C. Adjustable motor base for belt tension. D. Brackets for ceiling hung installation. E. Access door for wheel inspection and belt replacement. F. Belt guard. G. Fan inlet shall be a spun venturi throat overlapped by a backward curved centrifugal wheel with spun cone. H. Fan wheels shall be airfoil, centrifugal, backward inclined. I. Motor and drives shall be isolated from air stream. J. Motors shall be heavy duty type with permanently lubricated, sealed ball bearings. K. Shaft shall be keyed to both wheel and pulley and mounted in heavy duty permanently sealed pillow block bearings. L. Provide a unit�mounted, UL approved, safety disconnect switch as recommended by the manufacturer for all units. L’Acquis Number: 12056 ____________________________________________________________________________________________ Matt the Miller's Tavern Carmel, Indiana Project No. 12056 EXHAUST FANS 23 34 23 � 3 2.02 ROOF EXHAUST FANS: A. Roof exhaust fans shall be the centrifugal blower type with fan housing constructed of heavy gauge spun aluminum, mounted upon a rigid support and bird screen network of coated steel. The fan inlet shall have a spun venturi throat overlapped by a backward curved centrifugal wheel with spun cone for maximum performance. B. The motor and drive housing shall be mounted on vibration isolators and shall be completely sealed from the exhausted air and fumes. C. The motor cooling air shall be taken into the chamber from a location free of discharge contaminates. D. The entire drive assembly and wheel, as a unit, shall be removable through the support structure without dismantling the fan housing in any way. E. The wheel shaft shall be mounted in heavy duty ball bearing pillow blocks. Both pulleys shall be fully machined cast iron type keyed to the wheel and motor shafts. Motor pulley to be variable pitch adjustable. F. Provide an integral UL approved safety disconnect switch as recommended by the manufacturer for all units, mounted under motor dome. G. Upblast, vertical discharge type roof exhausters shall also include a built�in grease drain. H. Provide a backdraft damper in the inlet neck. 2.03 ROOF CURBS: A. Roof curbs shall be fabricated by the same manufacturer as the powered roof exhausters. B. The outer shell of the curb is to be formed and welded with wide mounting flange, constructed of galvanized steel. The corners are to be welded continuously to form a one piece, leakproof shell. The bottom of the curb is to have a base plate which encloses the lower edge of the insulation. Backdraft dampers are required on all units and damper holding trays are required. C. Rigid fiberglass insulation is to be firmly secured to the inside of the curb with metal clips. Wooden nailing strips are to be secured at the top of the curb shell to provide means for easily attaching the flashing material and equipment to the curb. D. Minimum curb height above finished roof shall be 12". Note special height through unit to be minimum 1' 8". E. This Contractor shall be responsible for furnishing and installing the equipment mounting roof curb immediately after he prepares the opening through the roof. The roofer then may run the flashing or roofing material up to the top of the curb and secure to the nailer base so that the ventilator base forms a counter�flashing when installed on L’Acquis Number: 12056 ____________________________________________________________________________________________ Matt the Miller's Tavern Carmel, Indiana Project No. 12056 EXHAUST FANS 23 34 23 � 4 the curb. A temporary weather cap/covering shall also be securely installed immediately after field flashing. PART 3 � EXECUTION 3.01 INSTALLATION A. Mount roof exhausters on the roof curbs after all roofing flashing and counter�flashing has been completed. Unless specifically scheduled on the Drawings to have hinged curbs, all fan mounting bases shall be securely fastened to the wood nailer by means of a minimum of two (2) rustproof round head wood screws on each side of the base flange. B. Where power to the roof exhauster is routed through the fan curb, wiring shall be in conduit installed in such a manner that it does not interfere with the operation of the backdraft damper. Conduit shall be routed adjacent to the active portion of the damper and shall be secured to the inside wall of the curb. C. Mount wall exhausters to the wall with a mounting plate. Remainder of unit is attached by fasteners to mounting plate. D. Provide spring type isolators sized to match the weight of each individual fan. Brackets shall be furnished with the units for hanging from structure above. E. Provide flexible connectors on inlet and discharge side of in�line exhaust fans; connect to ductwork. F. Check all units for proper performance, fan and/or motor rotation, and adjust as required. G. Refer to Section 20 01 90 for proper identification tagging of equipment. END OF SECTION