PART 1 - GENERAL 1.1 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Specification Sections, apply to this Section. B. Related Sections: 1. Section 15074 Mechanical Sound, Vibration, and Seismic Controls for HVAC Piping and Equipment : Product requirements for resilient mountings and snubbers for fans for placement by this section. 2. Section 15083 HVAC Insulation : Product requirements for power ventilators for placement by this section. 3. Section 15815 Metal Ducts : Product requirements for hangers for placement by this section. 4. Section 15820 Duct Accessories : Product requirements for Back-draft Dampers for placement by this section. 5. Section 16150 Wiring Connections : Execution and product requirements for connecting equipment specified by this section. 6. Section 15075 Mechanical Identification. 1.2 SUMMARY A. This Section includes propeller fans, equipment room filter vent sets, direct drive vaneaxial fans, belt driven vaneaxial fans, ceiling-mounted paddle fans, motors and fan accessories 1.3 REFERENCES A. ABMA STD 9 (American Boiler Manufacturers Association) - Load Ratings and Fatigue Life for Ball Bearings. B. ABMA STD 11 (American Boiler Manufacturers Association) - Load Ratings and Fatigue Life for Roller Bearings. C. AMCA 99 (Air Movement and Control Association) - Standards Handbook. D. AMCA 210 (Air Movement and Control Association) - Laboratory Methods of Testing Fans for Rating. E. AMCA 300 (Air Movement and Control Association) - Reverberant Room Method for Sound Testing of Fans. F. AMCA 301 (Air Movement and Control Association) - Methods for Calculating Fan Sound Ratings from Laboratory Test Data. G. NEMA MG1 (National Electrical Manufacturers Association) - Motors and Generators. H. UL 705 (Underwriters Laboratories, Inc.) - Power Ventilators. Page 1 of 17
1.4 PERFORMANCE REQUIREMENTS A. Project Altitude: Base air ratings on actual site elevations. B. Project Altitude: Base air ratings on sea-level conditions. C. Operating Limits: Classify according to AMCA 99. D. Fan Unit Schedule: The following information is described in an equipment schedule at the end of this Section. E. Fan Unit Schedule: The following information is described in an equipment schedule on the Drawings. 1.5 SUBMITTALS 1. Fan performance data including capacities, outlet velocities, static pressures, sound power characteristics, motor requirements, and electrical characteristics. 2. Fan arrangement including wheel configuration, inlet and discharge configurations, and required accessories. A. General: Submit each item in this Article according to the Conditions of the Contract and Specification Sections. B. No equipment shall be fabricated or delivered until receipt of approved shop drawings from the Owner. C. Provide the following information with each shop drawing submission. 1. Complete specification of the equipment which will be provided including all optional equipment. All equipment shall be tagged. Refer to "Mechanical Identification" Section for further requirements. 2. Submittal data shall show that all fans bear the AMCA Certified Performance Seal for both air and sound performance at the capacities specified on the Drawings. 3. Arrangement drawings showing proposed scroll arrangement, rotation, and discharge, drive arrangement, motor location, motor power connection location, access door location and drain connection locations as required. 4. Arrangement drawings including physical dimensions, support locations, identification of each component, and weight of fan assembly at each support location including drive and motor. Provide WR 2 for the fan wheel and drive assemblies, include individual WR 2 for each drive component. 5. Capacity and performance data corrected to actual operating temperature and altitude. Fan curves shall have operating points indicated. Refer to Engineering Service article in this section for actual fan curves and data required. 6. Motor data to verify motor type, efficiency and starting characteristics. 7. Wiring diagrams detailing wiring for power and control systems and differentiating clearly between manufacturer-installed wiring and field-installed wiring. 8. Fan noise characteristics including sound power levels for the 8 octave bands and a single sound power A-scale weighted level or sound levels in "Sones" Page 2 of 17
when the fan is operating at its peak horsepower output. Refer to Engineering Service article in this section for further data. 9. Blade position for vaneaxial fans. 10. Damper motor data for fan dampers controls, if applicable. 11. List of spare parts for one year's normal maintenance, including drive-belt part numbers where applicable. Include all "off the shelf" readily available purchased items on the list. List shall include subassembly part number (identifiable in maintenance manual or on shop drawings), manufacturer's name, manufacturer's part number and a part description. 12. Installation, operation, maintenance and lubrication instructions in shop manual format. D. Upon completion of the shop drawing submittal phase of the project, submit to the Owner for approval, three (3) copies of installation, operation and maintenance manuals which shall be in bound printed form. Each manual shall include one approved/reviewed copy of each item listed above. 1.6 CLOSEOUT SUBMITTALS A. Operation and Maintenance Data: Submit instructions for lubrication, motor and drive replacement, spare parts list, and wiring diagrams. 1.7 QUALIFICATIONS A. Manufacturer: Company specializing in manufacturing products specified in this section with minimum three years experience. B. Contractor: Company and company field staff specializing in performing Work of this section with minimum five years experience. 1.8 DELIVERY, STORAGE, AND HANDLING A. Protect motors, shafts, and bearings from weather and construction dust. 1.9 ENVIRONMENTAL REQUIREMENTS A. Do not operate fans for any purpose until ductwork is clean, filters in place, bearings lubricated, and fan has been test run under observation. 1.10 FIELD MEASUREMENTS A. Verify field measurements prior to fabrication. 1.11 EXTRA MATERIALS A. Supply two sets of belts for each fan size/type. 1.12 QUALITY CONTROL A. Electrical Component Standard: Provide components that comply with NFPA 70 and that are listed and labeled by UL where available. Page 3 of 17
B. Listing and Labeling: Provide electrically operated fixtures specified in this Section that are listed and labeled. 1. The Terms "Listed" and "Labeled": As defined in the National Electrical Code, Article 100. 2. Listing and Labeling Agency Qualifications: A "Nationally Recognized Testing Laboratory" (NRTL) as defined in OSHA Regulation 1910.7. C. AMCA Compliance: Provide products that are rated in accordance with AMCA Standard 210 and are licensed to use the AMCA Seal. D. NEMA Compliance: Motors and electrical accessories shall comply with NEMA standards. 1.13 WARRANTY A. The Fan Manufacturer shall warrant all equipment for one (1) year as described herein and as further required in the "Warranty" article of this Specification. B. Correct all critical defects within 24 hours following the Owner's verbal notification of a problem, for a period of one (1) year after acceptance by the Owner. A critical defect is defined as a defect in fan operation through bearing or shaft failure resulting from bearing burnout, or as a failure in fan operation resulting in belts breaking frequently. C. Correct all non-critical defects, such as excessive bearing noise or belt set replacement, within 30 days following the Owner's written notice, for a period of one (1) year after acceptance by the Owner. D. Acceptance date shall be considered date of issuance of a certificate of substantial completion. E. Failure to correct any defective work or equipment within 24 hours or within 30 days, as applicable, will render conduct negligent, in which case the Owner will be entitled to proceed with the correction of such defects at his discretion and to charge the Contractor cost plus 10% of the expenses incurred. F. The Contractor shall be responsible to repair all damage caused by any defect in the work or equipment, whose repair is covered under warranty. G. The Fan Manufacturer shall coordinate all labor and material provisions of the warranty with the Contractor. 1.14 ENGINEERING SERVICE A. The Fan Manufacturer shall furnish each fan with a motor which is 30% oversized and with capacity for a 10% increase in air flow and a corresponding 20% increase in total pressure. This increased capacity for each fan shall be based on an airflow and total pressure which are over and above the present and future values as scheduled on the Drawings. The Fan Manufacturer shall provide each fan with a drive which will meet the present capacity condition as scheduled on the Drawings. B. In addition to the design parameter stated above for increased capacity, the fan motor and drive selection shall be based on the following: Page 4 of 17
1. All fans shall be non-overloading. 2. The fan motor size shall be based on available sheave sizes, where fixed pitch sheaves are employed on both the motor and fan shafts. I.e. Based on the present or future scheduled condition for airflow and total pressure (whichever is worse) with replacement of the smaller sheave, the fan shall not overload. 3. The fan (single fan arrangements) shall be considered to be non-overloading when, with the fan operating 10 percent faster than the present (or future) scheduled conditions, a decrease in total pressure results in an increase in flow to 130% of the present (or future) scheduled air flow along the fan operating curve without the fan overloading. 4. Where dual fans are employed (two fans operating from a single plenum to another single plenum), the individual fans shall be considered to be non-overloading when, with the fans operating 10 percent faster than the present or future scheduled conditions, the fan is non-overloading on any part of its fan operating curve. 5. Per AMCA Publication 203, the following allowances shall be made for V-Belt Drive Losses: MOTOR BELT DRIVE MAXIMUM FAN HORSEPOWER LOSS (BHP) BRAKE HORSEPOWER 1/4 0.06 0.19 1/3 0.08 0.25 1/2 0.10 0.40 3/4 0.13 0.62 1.0 0.15 0.85 1.5 0.21 1.29 2.0 0.26 1.74 3.0 0.33 2.67 5.0 0.45 4.55 7.5 0.62 6.88 10 0.80 9.2 15 1.1 13.9 20 1.5 18.5 25 1.8 23.2 30 2.1 27.9 40 2.7 37.3 50 3.3 46.7 60 3.9 56.1 75 4.9 70.1 100 6.3 93.7 125 7.9 117.1 150 9.3 140.7 200 12 188 6. All motors shall be selected to operate with a service factor of 1.0 or less. Motors shall not be designed to operate over nominal motor horsepower. Page 5 of 17
C. The Fan Manufacturer's engineer shall prepare the following fan performance curves for submission: 1. Fan curve for present operating condition as scheduled on the drawing with proposed drive or fan blade setting. 2. Fan curve for future operating condition as scheduled on the drawing with proposed drive or fan blade setting. 3. Fan curve for fan speed 10 percent faster than for present (or future) operating condition, whichever is worse, as scheduled on the drawing with proposed drive or fan blade setting. Note: For proposed drive allow only one drive sheave to be changed. 4. For fans with motors 5 horsepower and larger, sound power levels when the fan is operating at its peak horsepower output shall be provided for each of the eight octave bands and for a single A-scale rated level. Power levels shall be in units of "db re 1pW". Power levels shall be provided for the present condition and the future condition and for the 10 percent faster condition listed above. 5. For fans with motors under 5 horsepower and for roof exhaust fans, sound levels shall be provided in "Sones" or in a manner similar to the larger fans at the Fan Manufacturer's option. 6. Correction factors shall be applied to the above curves for altitudes and for the lowest operating temperature. 7. Fan curves shall include allowances for fan inlet vanes, fan inlet boxes, fan inlet cones, and fan discharge cones which are provided by the Fan Manufacturer in conjunction with the individual fans. 8. Fan curves shall be constructed as follows: a. Flow in SCFM (ACFM) on the horizontal. b. Total or static pressure in inches of water gauge on the vertical. c. Fan brake horsepower at the fan shaft on the vertical (not including drive losses). d. Fan mechanical efficiency on the vertical. e. Any correction factors for the above shall be tabulated on the curve. f. Modifications to the above with varying positions of the fan inlet vanes of in-flight pitch fan blade controls from full open to full closed. g. A statement of the fan speed, the maximum fan speed, and of the maximum anticipated fan brake horsepower for the fan speed listed along any part of the fan curve. h. A statement of fan operating point with each of the four parameters (SCFM), (ACFM), Pressure, BHP, and Mechanical efficiency) listed. i. Note to Fan Manufacturer, generic fan curves which cover many sizes and speeds are not acceptable. All curves shall be tailored to the individual fan. j. Curves shall reflect operating parameters for standard air and non-standard air. Adjustments and calculations for fans moving non-standard air shall be provided. All corrections shall include elevation adjustments and temperature of air stream. 1.15 DELIVERY, STORAGE, AND HANDLING A. Deliver fans as factory-assembled units, to the extent allowable by shipping limitations, with protective crating and covering. B. Disassemble and reassemble units as required for movement to the final location following manufacturer's written instructions. C. Lift and support units with the manufacturer's designated lifting or supporting points. Page 6 of 17
D. The Fan Manufacturer shall identify shipments from the Fan Manufacturer and his suppliers with the Contractor's purchase order number. The Fan Manufacturer shall furnish a detailed list of parts in each shipment to permit satisfactory checking when received. E. The Fan Manufacturer shall tag and place separate parts too small to mark in containers plainly marked on outside as to contents and the Contractor's purchase order number. In shipping bolts, different kinds and sizes shall be kept separate, either by separate containers or partitions in same container. F. After loading equipment for shipment, the Fan Manufacturer shall notify the Contractor via telephone facsimile with the name of carrier, car number, description of equipment, order number, weight of heaviest piece, shipping point, date of shipment, and estimated time of arrival. G. The fans shall not be shipped until the Owner has given his verbal approval that the site has been prepared to a sufficient degree that it is ready for delivery. 1.16 PROJECT CONDITIONS A. Field Measurements: Verify dimensions by field measurements. Verify clearances. B. Do not operate fans until ductwork is clean, filters are in place, bearings are lubricated, and fans have been commissioned. 1.17 COORDINATION AND SCHEDULING A. Coordinate the size and location of concrete housekeeping pads as applicable. Cast anchor-bolt inserts into pad. Concrete reinforcement and formwork requirements are specified in Division 3 Sections. B. Coordinate the installation of roof curbs, equipment supports, and roof penetrations. Roof specialties are specified in Division 7 Sections. 1.18 EXTRA MATERIALS A. Furnish one set of belts for each belt-driven fan that match products installed, are packaged with protective covering for storage, and are identified with labels clearly describing contents. PART 2 - PRODUCTS 2.1 MANUFACTURERS A. Available Manufacturers: Subject to compliance with requirements, manufacturers offering products that may be incorporated in the Work include, but are not limited to, the following: B. Manufacturers: Subject to compliance with requirements, provide products by one of the following: Page 7 of 17
1. Propeller Fans: a. Greenheck Fan Corp. b. Cook (Loren) Co. c. Twin City Fan & Blower Co. 2. Vaneaxial Fans: a. Greenheck Fan Corp. b. Cook (Coren) Co. c. Twin City Fan & Blower Co. 2.2 AIR MOVING EQUIPMENT-GENERAL A. All air moving equipment shall be licensed to bear the AMCA seal. The ratings for the fans shall be based on tests which are made in accordance with AMCA Standard 210 and which comply with the requirements of the AMCA Certified Rating Program. Fans shall be AMCA certified for both air moving capacity and sound performance. B. All fan drive arrangements and motor positions listed on the drawings shall be based on AMCA Standards. C. Refer to the drawings for actual fan scroll arrangements. D. All fans or the fan motors shall bear the Underwriter's Laboratory Label. 2.3 FAN DRIVES A. For belt-driven fans serving main air handling units, the Fan Manufacturer shall provide V-belt drives with a minimum service factor of 2.0 with all belts in service and of 1.3 with one belt broken. Drive horsepower ratings shall be based on the nominal fan motor horsepower. B. For all other applications the Fan Manufacturer shall provide V-belt drives with a service factor of 1.65 minimum based on nominal fan motor horsepower. C. V-belt drives for motor sizes up to 25 horsepower shall be adjustable type (plus or minus 10 percent) with the fan sheave being fixed and the motor sheave being adjustable; the drive shall be selected with the fan operating near the mid-point of the drive sheave based on the performance scheduled under the present condition. D. V-belt drives for motor sizes 30 horsepower and larger shall be fixed sheave type for both the fan and the motor and shall be selected based on the performance scheduled under the present condition. E. All exposed V-belt drives shall be enclosed in an OSHA approved removable belt cover with tachometer openings. F. The Fan Manufacturer shall provide all V-belts in matched sets for all initial installations and for warranty work. G. Under the base contract and after initial balancing, the Fan Manufacturer shall furnish the Air Balancing Subcontractor with the correct fixed pitch sheave(s) (with belts) to match Page 8 of 17
the air balance requirements. These sheaves shall be installed by the Contractor at no additional charge to the Owner. 2.4 PROTECTIVE COATINGS AND FINISHES A. Unless otherwise noted, all interior carbon steel surfaces in contact with the airstream shall be finished with the Fan Manufacturer's standard enamel finish. B. Unless otherwise noted, fans or fan parts constructed of aluminum or stainless steel will not require interior or exterior surfaces to be painted. C. On fume exhaust fans, when noted, all metal surfaces in contact with the exhaust airstream shall be finished with a DuPont or Heresite air-dried epoxy paint. The epoxy paint shall be applied in 3 even coats in accordance with the coating manufacturer's instructions; minimum final coating thickness shall be as scheduled. Each coat of epoxy paint shall be color-coded. All metal surfaces which are to receive an epoxy paint finish shall be sandblasted to bare metal and all metal edges shall be hand-rounded prior to applying the paint finish. D. Fans located indoors shall have the Fan Manufacturers standard enamel finish applied to the exterior of the fan. E. Standard (non-fume) fans located outdoors shall have the exterior of the fan finished with the same finish as the interior except the finished shall be of a thickness as scheduled. F. Fume exhaust fans located outdoors shall have the exterior of the fan finished with the same finish as the interior except the finished shall be of a thickness as scheduled. G. Fan shafts shall not be painted. 2.5 SPARK RESISTANT CONSTRUCTION A. Fans tagged shall be furnished with all parts of the fan, which are in contact with the air or gas handled, made of non-ferrous material to meet AMCA Type A spark-resistant construction. B. Fans tagged shall be furnished with a non-ferrous wheel and ring around the opening through which the shaft passes, to meet AMCA Type B spark-resistant construction. C. Fans tagged shall be furnished with a non-ferrous inlet cone and housing coverplate on the side opposite the inlet, to meet AMCA Type C spark-resistant construction. 2.6 FAN CONSTRUCTION CLASSIFICATION A. Fan construction classification shall be based on AMCA Class Standard AS2408-69. B. Minimum fan construction class for this project is Class II or III. C. Fans shall be constructed in accordance with the following schedule: Page 9 of 17
2.7 PROPELLER FANS 1. Use Class I for outlet velocities up to 2000 FPM or pressures up to 2.5" w.g. 2. Use Class II for outlet velocities from 2000 up to 2750 FPM or pressures from 2.5" w.g. up to 4.5" w.g. 3. Use Class III for outlet velocities over 2750 FPM or pressures over 4.5" w.g. A. Provide propeller exhaust fans as scheduled on the drawings. B. Fans shall be constructed of cast aluminum or fabricated steel blades and a minimum 14-gauge steel mounting panel with rolled Venturi inlet finished with enamel paint. Fan wheel shall be statically and dynamically balanced. Fan shaft and motor shaft bearings shall be the permanently lubricated, heavy duty, sealed type. C. Fan drive shall be direct type or V-belt driven. Refer to Fan Drive article in this section for further requirements. D. All motors under 1/2 horsepower shall be single-phase type with permanent split capacitor design. Motors 1/2 horsepower and over shall be 3-phase. Refer to Section 15055 "Motors" for fan motor requirements. E. Fans shall be furnished with rear guard for fan motor and blades and motorized relief damper (operable louver) constructed with edge sealed aluminum blades, nylon bearings and stainless steel pins. Relief damper shall be painted color as selected by the Owner. F. Fans shall be AMCA-certified for both air and sound performance at the capacities listed on the Drawings. G. Fans shall be UL listed and shall have UL label affixed. H. Design Basis: Greenheck Direct Drives S or Belt Drive - SB. I. Accessories: The following accessories are required as indicated: 1. Gravity Shutters: Aluminum blades in aluminum frame, interlocked blades with nylon bearings. 2. Motor-Side Back Guard: Galvanized steel, conforming to OSHA specifications, removable for maintenance. 3. Wall Sleeve: Galvanized steel to match fan and accessory size. 4. Weathershield Hood: Galvanized steel to match fan and accessory size. 5. Weathershield Front Guard: Galvanized steel with expanded metal screen. 6. Variable-Speed Controller: Solid-state control to reduce speed from 100 percent to less than 50 percent. 7. Disconnect Switch: Nonfusible type, with thermal-overload protection mounted inside fan housing, factory wired through an internal aluminum conduit. 2.8 DIRECT DRIVE VANE A. Provide direct drive adjustable pitch or fixed pitch vaneaxial fans with arrangement and capacities as scheduled on the drawings. All scheduled capacities are without inlet or discharge cones. Page 10 of 17
B. Housings shall be tubular type to provide straight through airflow and shall be constructed of heavy gauge welded steel. Housings for fans 24 inches in size and larger shall be provided with access doors for inspection of the motor and fan wheel. Housings shall be furnished with stationary curved guide vanes, welded within the housing and located on the discharge side of the fan. C. Adjustable pitch fans shall have a wheel constructed of cast aluminum airfoil shaped blades with a cast aluminum hub. Manual blade adjustment shall be accomplished without removing wheel. Fixed pitch fans shall have a fan wheel constructed of steel blades. D. Fan motors shall be totally enclosed air over type, refer to Section 15055 "Motors" for further requirements. Electrical motor leads shall be extended to a junction box located on the outside of the fan housing. All motor bearings shall be prelubricated at the factory prior to shipment and shall be provided with extended lubrication fittings. Grease supply lines shall be extended to the outside of the fan housing. E. The fan with motor shall be completely assembled at the factory by the fan manufacturer and given a running test prior to shipment. F. Each fan shall be provided with hanger or support brackets for mounting the fan in the horizontal or vertical position shown on the drawings. Each fan shall be provided with rubber in shear or spring type vibration isolators; refer to 15074 "Vibration and Seismic Controls for HVAC Piping and Equipment" for further requirements. G. Motor operated in-flight blade pitch control or fan inlet vanes shall be provided when scheduled on the drawings. Refer to Fan Volume Controls article in this section for further requirements. H. Where shown on the plans, the fans shall be provided with inlet boxes, inlet cones and outlet cones. All outlet cones shall be provided with access doors for adjustment of blades. Refer to articles in this section for further requirements for these items. I. Fan shall be provided with the Fan Manufacturers standard enamel finish. J. Fans shall be tested in accordance with AMCA certification procedures for air and sound performance at the capacities listed on the Drawings. K. Accessories: The following accessories are required as indicated: 1. Companion Flanges: Rolled-steel flanges. 2. Inlet and Outlet Screens: Wire mesh screen on fans not connected to ductwork. 3. Backdraft Dampers: Butterfly style, for mounting with flexible connection to the discharge of the fan or direct mounted to the discharge diffuser section. 4. Stall Alarm Probe: Sensing probe capable of detecting fan operation in stall and signaling control devices. Control devices and sequence of operation are specified in Section 15900 HVAC Instrumentation and Controls. 5. Flow Measurement Port: Pressure measurement taps installed in the inlet of the fan to detect and signal airflow readings to temperature-control systems. Control devices and sequence of operation are specified in Section 15940 Sequence of Operations. Page 11 of 17
2.9 BELT DRIVEN VANE A. Provide adjustable or fixed pitch vaneaxial fans with arrangement and capacities as scheduled on the drawings. All scheduled capacities are without discharge cones. B. Housings shall be tubular type to provide straight through airflow and shall be constructed of heavy gauge welded steel. Housings shall be provided with access doors for inspection of the fan bearings, fan drive, and fan wheel. Housings shall be furnished with stationary curved guide vanes, welded within the housing and located on the discharge side of the fan. C. The fan wheels shall be constructed of fabricated or cast steel blades with a steel hub. Fan wheels shall be capable of operating in an environment of 300 deg. F for 2-hours. Normal operating temperature will be 70 deg. F to 85 deg. F. Manual blade adjustment shall be accomplished without removing wheel (for adjustable pitch fans). D. Bearings shall be anti-friction ball bearing pillow blocks rated for an L-10 life of 200,000 hours. Bearings shall be mounted out of the air stream in an airtight gasketed enclosure. All bearings shall be lubricated with high temperature grease at the factory prior to shipment and provided with extended lubrication fittings. Grease supply lines shall be extended to the outside of fan housing. Provide nameplate at grease fittings indicating "Hi-Temperature Grease Only". E. Fans shall be provided with V-belt drive and streamlined belt drive fairings. Fairings shall be continuously welded to prevent caustics, corrosives and fumes from entering belt drive assembly. Belt drive assembly shall be selected for fan speed offering peak efficiency (coordinated with fan blade position). Refer to Fan Drives article in this section for further requirements. Exterior belt guard shall be OSHA approved type with expanded metal sides. F. The fan with motor shall be completely assembled at the factory by the fan manufacturer and given a running test prior to shipment. Refer to Section 15055 "Motors" for fan motor requirements. G. Each fan shall be provided with hanger or support brackets for mounting the fan in the horizontal or vertical position shown on the drawings. Each fan shall be provided with rubber in shear or spring type vibration isolators; refer to Section 15074 "Vibration and Seismic Controls for HVAC Piping and Equipment" for further requirements. H. Vertical discharge (up blast) roof mounted fans shall be provided with heavy duty mounting plate frame with vibration isolation type roof curb. The entire assembly shall be suitable to withstand a 100 miles per hour windstorm and shall include guy wires, if necessary. Refer to Roof Curb article in this section for further curb requirements. Refer to Section 15074 "Vibration and Seismic Controls for HVAC Piping and Equipment" for vibration control requirements. I. Fans shall be provided with the following accessories: 1. Refer to Section 15051 Motors and Variable Frequency Drives for fan volume control. 2. Spark resistant construction shall be provided on those fans listed in the Spark Resistant Construction article in this section. Page 12 of 17
3. Fan inlet boxes, inlet cones, and outlet cones shall be provided where shown on the drawings. All fans with adjustable pitch blades and with outlet cones shall be provided with access doors in the outlet cones for blade adjustment. 4. Disconnect switches for each fan mounted on the roof, refer to Section 15055 Motors for further requirements and coordinate with the Electrical Contractor. J. Refer to Protective Coating and Finish article in this section for fan finish requirements. K. Fans shall be AMCA-certified for both air and sound performance at the capacities listed on the Drawings. 2.10 FAN INLET BOXES, INLET CONES AND OUTLET CONES A. Fans tagged shall be furnished with inlet boxes, inlet cones and outlet cones. B. Each inlet box, inlet cone and outlet cone shall be furnished with a factory-installed access door for servicing fan bearings and for blade adjustment. Refer to Access Door article in this section for further requirements. C. Fan inlet boxes, inlet cones and outlet cones shall be furnished by the Fan Manufacturer. The performance of these devices (flow and pressure drop characteristics) shall be guaranteed by the Fan Manufacturer. D. The Fan Manufacturer shall furnish fan inlet boxes, whether or not indicated on the Drawings, for all fans which are configured with a 90 degree turn at the air inlet. E. Fan inlet boxes, inlet cones, and outlet cones shall meet or exceed SMACNA construction and gauge requirements. F. The fan inlet boxes, inlet cones and outlet cones shall be constructed with the same materials, protective coatings and finishes, as the fans for which they are provided. G. The fan inlet boxes, inlet cones, and outlet cones shall be constructed of the same material thickness as the adjoining duct system. 2.11 WEATHER HOODS A. All fans located outdoors shall be provided with the Fan Manufacturer's standard ventilated weather hood for protection of both the fan motor and drive. 2.12 ACCESS DOORS A. All access doors for fans with scheduled total pressures of 2 inches or less shall be provided with hinged, gasketed access doors with cam-type levers. B. All access doors for fans with over 2 inches total pressure shall be provided with gasketed access doors with steel stud fasteners. C. All hardware (i.e. hinges, latches, studs, and nuts) for access doors located outdoors shall be 304 stainless steel. Page 13 of 17
2.13 ROOF CURBS A. The individual Fan Manufacturer(s) shall furnish prefabricated roof curbs for each roof fan and hood. Curbs shall be of box section design, 18 gauge galvanized steel with continuous welded corner seams, factory installed wood nailer and insulated with 1-1/2 inch, 3 pound density rigid fiberglass board. Height of curb shall be determined in field (15" minimum). B. The base of each curb shall be pitched to match the roof pitch while maintaining a level fan installation. C. Curb shall be Fan Manufacturer's standard curb similar to the Roof Products Systems (RPS) Type RC-2A. D. In addition, the roof curbs for the following fans shall be provided with the Fan Manufacturer's standard sound attenuation material, refer to Section 15074 Vibration and Seismic Controls for HVAC Piping and Equipment. 2.14 SOURCE QUALITY CONTROL A. Testing Requirements: The following factory tests are required as indicated: 1. Sound Power Level Ratings: Comply with AMCA 301, "Methods for Calculating Fan Sound Ratings from Laboratory Test Data." Test fans according to AMCA 300, "Reverberant Room Method for Sound Testing of Fans." Label fans with the AMCA Seal. 2. Fan Performance Ratings: Establish flow rate, pressure, power, air density, speed of rotation, and efficiency by factory tests and ratings according to AMCA 210, "Laboratory Methods of Testing Fans for Rating." PART 3 - EXECUTION 3.1 EXAMINATION A. Examine areas and conditions for compliance with requirements for installation tolerances and other conditions affecting performance of the fans. Do not proceed with installation until unsatisfactory conditions have been corrected. 3.2 INSTALLATION A. Install fans according to manufacturer's written instructions. B. Support units using the vibration-control devices indicated. Vibration-control devices are specified in Section 15074 "Vibration and Seismic Controls for HVAC Piping and Equipment." C. Suspend units from structure using threaded steel rods and vibration isolation springs. Vibration-control devices are specified in Section 15074"Vibration and Seismic Controls for HVAC Piping and Equipment." D. Install units with clearances for service and maintenance. Page 14 of 17
E. Label fans according to requirements specified in Section 15075 "Mechanical Identification." 3.3 CONNECTIONS A. Duct installation and connection requirements are specified in other Division 15 Sections. Drawings indicate the general arrangement of ducts and duct accessories. Make final duct connections with flexible connector. B. Electrical: Conform to applicable requirements in Division 16 Sections. C. Grounding: Ground equipment. Tighten electrical connectors and terminals, including grounding connections, according to manufacturer's published torque-tightening values. Where manufacturer's torque values are not indicated, use those specified in UL 486A and UL 486B. 3.4 FIELD QUALITY CONTROL A. Manufacturer's Field Service: Provide services of a factory-authorized service representative to supervise the field assembly of components and installation of fans, including duct and electrical connections, and to report results in writing. 3.5 ADJUSTING A. Adjust damper linkages for proper damper operation. B. Adjust belt tension. C. Lubricate bearings. 3.6 CLEANING A. After completing installation, inspect exposed finish. Remove burrs, dirt, and construction debris, and repair damaged finishes including chips, scratches, and abrasions. B. Clean fan interiors to remove foreign material and construction debris. Vacuum clean fan wheel and cabinet. 3.7 START-UP OF FANS A. The Fan Manufacturer or his authorized service representative shall provide start-up service for each centrifugal and axial fan with a scheduled capacity of 5 horsepower or larger and for each roof exhaust and cabinet exhaust fan with a scheduled capacity of 3/4 horsepower or larger. B. The Contractor shall provide start-up service for all other fans. C. Lubricate and start-up all fans in accordance with manufacturer's published instructions. Prepare and submit for approval a completed start-up data sheet or checklist for each equipment item. The Fan Manufacturer's representative shall be present at fan start-up as stated above and shall sign the start-up data sheet certifying correct installation and Page 15 of 17
start-up. Do not energize any large 3-phase fan motors except in the presence of the Fan Manufacturer's authorized service representative. D. Start-up service shall, as a minimum, include the following: 1. Lock out power source. 2. Verify that mounting arrangement and duct connections are adequately installed in accordance with recognized acceptable installation practices and with the Fan Manufacturer's recommendations. 3. Check adjustable pitch vane axial fans for proper blade setting positions. 4. Check and tighten all securing bolts. 5. Spin wheel to verify that rotation is free and that the wheel does not rub or bind. 6. Inspect wheel to verify proper rotation for fan design. 7. Check all set screws and tighten, if necessary. 8. Check lubrication. 9. Verify all electrical power connections. 10. Check V-belt drive or coupling for proper alignment. 11. Check V-belt drive for proper tension. For construction projects with 3 months or longer between fan shipment and start-up, all belt-driven fans shall be furnished with V-belts shipped loose. The Fan Manufacturer shall provide a factory-trained service representative for tightening the belts in accordance with the manufacturer's directions. The Contractor shall check belt tension during the second and seventh day's operation and re-adjust belts, as may be required, to maintain proper tension as directed by the Fan Manufacturer. 12. Remove all foreign loose material in ductwork leading to and from the fan and in the fan itself. 13. Disengage all shipping fasteners on vibration isolation equipment. 14. Check safety guards to insure they are properly secured. 15. Secure all access doors to the fan and the ductwork. 16. Switch electrical supply "on" and allow fan to reach full speed. 17. Check carefully for correct wheel rotation, proper belt alignment, proper lubrication, proper amperage and voltage readings, excessive vibration and unusual noise. 18. Tabulate voltage and amperage readings. 19. Physically check each fan at start-up and shut-down to insure no abnormal or problem conditions exist. 20. If any problem arises, switch the fan "off" immediately. Lock out the electrical supply, check carefully for the cause of the problem and correct as necessary. E. The Fan Manufacturer shall provide the services of an authorized service representative for one blade pitch adjustment of each adjustable pitch vaneaxial fan under the base contract. This service will not be used for adjusting blades to settings shown on the equipment submittals; blade settings, as shown on submittals, shall be provided at the factory before shipment of fans. 3.8 DEMONSTRATION A. Train Owner's maintenance personnel on procedures and schedules related to startup and shutdown, troubleshooting, servicing, and preventive maintenance. B. Review data in the operation and maintenance manuals. Refer to Section "Contract Closeout." C. Schedule training with Owner with at least 7 days' advance notice. Page 16 of 17
D. Demonstrate operation of products specified in this Section. Conduct walking tour of the Project. Briefly identify location and describe function, operation, and maintenance of each product. END OF SECTION Page 17 of 17