SECTION A. Horsepower: Do not increase or decrease fan motor horsepower without written approval from Engineer.
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1 PART 1 GENERAL SECTION HVAC FANS 1.01 SUMMARY A. Section Includes: 1. Exhaust fans. 2. Transfer fans. B. Related Documents: 1. Drawings and general provisions of the Contract, including General Conditions and Division 1 Specification Sections, apply to the work of this Section. 2. Where contradictions occur between this Section and Division 1, the more stringent of the two shall apply. Engineer shall determine which is more stringent. 3. Motors: Comply with requirements in Division 23 Common Motor Requirements for HVAC Equipment DESIGN REQUIREMENTS A. Horsepower: Do not increase or decrease fan motor horsepower without written approval from Engineer. B. Fans for smoke control systems shall comply with UL Power Ventilators for Smoke Control Systems 1.03 QUALITY ASSURANCE A. Quality Standards: 1. ARI Provide fans with AMCA Certified Rating Seal SUBMITTALS A. Submit manufacturer's product data including: 1. Performance data: a. Fan Curves. b. Sound Data. 2. Accessories descriptions. 3. Support requirements. 4. Operating weight. 5. Drawings showing: a. Dimensions of complete assembly. b. Curb if used. c. Sizes and locations of duct connections. d. Maintenance clearances. 6. Where called for in the schedule, include the fan moment of inertia (WR 2 ) and the (WR 2 ) capability of the fan motor corrected for the fan/motor speed ratio. Loveland Library HVAC FANS
2 PART 2 PRODUCTS 2.01 IN-LINE CENTRIFUGAL EXHAUST FANS A. Approved Manufacturers: 4. Jenn Air. 5. Penn. 6. Twin City. B. Performance: As scheduled. C. Housing: 1. Minimum 18 gauge galvanized steel with integral duct collars. 2. Bolted construction. 3. Corrosion resistant fasteners. 4. Bolted access doors on three sides. 5. Pivoting motor plate and engraved nameplate. D. Wheel: 1. Centrifugal backward inclined % aluminum. 3. Machined cast aluminum hub. 4. Balanced to AMCA Standard E. Bearings: 1. Heavy duty. 2. Greasable ball-type in pillow block cast iron housing. 3. Minimum L50 life in excess of 200,000 hours at maximum operating speed. F. Belts: Oil and heat resistant, non-static type. G. Drives: 1. Machined cast iron 2. Keyed to the wheel and rotor shafts. 3. Sized for 150% of the installed motor horsepower. 4. Variable pitch where scheduled. H. Accessories: As scheduled CABINET EXHAUST/TRANSFER FAN A. Approved Manufacturers: 4. Jenn air. 5. Nutone 6. Penn. 7. Twin City. B. Performance: As scheduled. C. Cabinet: Steel with internal acoustic liner. Loveland Library HVAC FANS
3 D. Grille: Aluminum, removable. E. Wheel: Centrifugal, steel. F. Damper: Integral, backdraft flapper type. G. Accessories: As scheduled CENTRIFUGAL ROOF EXHAUST FANS A. Manufacturers: 4. Jenn Air. 5. Penn. 6. Twin City. B. Model and Performance: As scheduled. C. Features: 1. Aluminum housing. 2. Ball bearings. 3. Factory-fabricated roof curb. D. Accessories: 1. Bird screen. 2. Disconnect switch. 3. Backdraft damper: 0.2 inches W.C. max. pd. 4. Motorized type backdraft damper where indicated. PART 3 EXECUTION 3.01 INSTALLATION A. Install units with clearances for service and maintenance. B. Label fans according to requirements specified in Division 23 Section Identification for HVAC Piping and Equipment LUBRICATION A. Insure that fans are properly lubricated NOISE AND VIBRATION A. Insure that fans are properly supported on vibration isolators. B. Insure that flexible duct connections are properly made. C. Check fan for improper balance. Re-balance if necessary. D. Check for proper rotation ACCESS A. Provide for proper access to all parts of fan needing inspection or service with access Loveland Library HVAC FANS
4 doors in fan or ductwork. Loveland Library HVAC FANS
5 3.05 ADJUSTING A. Adjust belt tension. END OF SECTION Loveland Library HVAC FANS
UNIVERSITY OF ROCHESTER DESIGN STANDARDS OCTOBER 18, 2013
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