Transcript
Twin City Fan & Blower Guide Specification Centrifugal Roof Ventilators: Model BHRE, Belt Driven Twin City Fan & Blower Model BHRE Series, Hinged Restaurant Exhaust Fans, designed specifically for roof mounted applications handling grease laden air and elevated temperatures from kitchens, restaurants, and cooking and dishwasher hoods. The compact, low profile design hinges on the roof curb to provide easy access for cleaning and maintenance of the unit. BHRE fans feature fully welded, non-overloading, backward inclined centrifugal wheels designed for maximum efficiency and quiet operation. All wheels are statically and dynamically balanced. BHRE fans are manufactured under strict quality assurance standards to ensure catalogued performance and years of trouble free operation. Application Hinged Restaurant Exhaust fans mounted on a hinged roof curb cover, offering easy access for cleaning residue from grease-laden restaurant kitchen exhaust air. Sizes (wheel diameters): 10.50 to 24.50 inches (267 mm to 622 mm) Airflow: Up to 9,000 CFM (15,291 m3/hour) Static Pressure: Up to 5 inches wg (1,245 Pa) Twin City Fan & Blower (TCF) is an industry leading designer and manufacturer of high quality commercial and industrial fans and is a division of Twin City Fan Companies, Ltd. Our extensive product line includes centrifugal fans and blowers, axial fans, and power roof ventilators. For the commercial market, TCF supplies ventilation fans for retail and office buildings, restaurants, schools, hospitals, and government buildings. TCF’s industrial fans are used in a wide variety of process applications for numerous industries including Petrochemical, Nuclear, Cement, Steel, and Air Pollution Control. Special materials, construction, coatings, and accessories are available to fit any application requirements. TCF has completed thousands of successful installations across the globe and has a proven track record for tackling the most technically complex applications within the fan industry. TCF is also known for its technical design capabilities, comprehensive testing services, and responsive sales team. Due to the company’s extensive expertise and long-standing reputation for proven quality, TCF products continue to be specified around the globe. TCF occupies over 1,000,000 sq. ft. of manufacturing space across ten facilities in the U.S, with expanded manufacturing and service operations located in South America, Europe, India, China, and Singapore. Headquarters are located in Minneapolis, Minnesota, which houses the management, sales and marketing, accounting, human resources, material management, engineering personnel, as well as a state-of-the-art AMCA accredited testing lab. We recommend you consult with your Twin City Fan & Blower Sales Representative, who can be contacted through: Twin City Fan & Blower, Minneapolis MN; (763) 551-7600; email:
[email protected]; www.tcf.com. This document Copyright© 2015 Twin City Fan & Blower
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SECTION 23 34 23.02 CENTRIFUGAL ROOF VENTILATORS PART 1 - GENERAL 1.1
SUMMARY Specifier: Select fan drive style in following paragraph. A.
1.2
Section includes hinged restaurant exhaust fans, belt driven. REFERENCE STANDARDS
A.
American Bearing Manufacturers Association (ABMA): www.americanbearings.org: 1.
B.
Air Movement and Control Association International, Inc. (AMCA): www.amca.org: 1. 2. 3. 4. 5. 6.
C.
NFPA 70 - National Electric Code NFPA 96 - Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations
Underwriters Laboratories, Inc. (UL): www.ul.com: 1. 2.
1.3
NEMA MG 1 – Motors and Generators
National Fire Protection Association (NFPA): www.nfpa.org: 1. 2.
E.
AMCA Standard 204 - Balance Quality and Vibration Levels for Fans AMCA Standard 205 - Energy Efficiency Classification for Fans AMCA Standard 210 - ASHRAE 51 - Laboratory Methods of Testing Fans for Certified Aerodynamic Performance Rating AMCA Publication 211 - Certified Ratings Program - Product Rating Manual for Fan Air Performance AMCA Standard 300 - Reverberant Room Method for Sound Testing of Fans AMCA Publication 311 - Certified Ratings Program - Product Rating Manual For Fan Sound Performance
National Electrical Manufacturers Association (NEMA): www.nema.org 1.
D.
ABMA 9 – Load Ratings and Fatigue Life for Ball Bearings
UL 705 - Standard for Power Ventilators UL 762 - Standard for Power Roof Ventilators for Restaurant Exhaust Appliances
ACTION SUBMITTALS A.
Product Data: Include the following: 1. 2. 3. 4. 5.
Rated capacities and operating characteristics. Fan Performance Data: Fan performance curves with flow, static pressure and horsepower. Sound Performance Data: Fan sound power levels in eight octave bands and, Aweighted overall sound power level or sone values. Motor ratings and electrical characteristics. Furnished specialty components.
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6. 7.
Specified accessories. Dimensioned standard drawings indicating dimensions, weights, and attachments to other work.
Specifier: If Contractor will be required to provide engineering drawings and calculations for vibration, seismic, or high wind design, insert requirements here. 1.4
INFORMATIONAL SUBMITTALS A.
Source quality-control reports.
B.
Field quality-control reports.
C.
ISO-9001 certificate.
1.5
CLOSEOUT SUBMITTALS A.
1.6
Operation and Maintenance Data: Include routine maintenance, adjustment requirements, safety information, and troubleshooting guide. QUALITY ASSURANCE
A.
Manufacturer Qualifications: Approved ISO 9001-compliant manufacturer listed in this Section with minimum 10 years' experience in manufacture of similar products in successful use in similar applications, and with an ASME NQA-1 compliant Program. Specifier: Retain paragraph below if Owner allows substitutions but requires strict control over qualifying of substitutions. 1.
Approval of Comparable Products: Submit the following in accordance with project substitution requirements, within time allowed for substitution review: a. b. c.
2. 3. B.
Substitutions following award of contract are not allowed except as stipulated in Division 01 General Requirements. Approved manufacturers must meet separate requirements of Submittals Article.
AMCA Compliance: 1. 2. 3.
1.7
Product data, including certified independent test data indicating compliance with requirements. Project references: Minimum of 5 installations not less than 5 years old, with Owner contact information. Sample warranty.
Provide fan types tested in accordance with ANSI/AMCA Standard 210 (air performance) and ANSI/AMCA Standard 300 (sound performance) in an AMCA-accredited laboratory. Provide fan units rated according to AMCA Standard 211 (air performance) and AMCA Standard 311 (sound performance). Provide fan units rated according to AMCA Standard 205 (fan efficiency grade).
COORDINATION A.
Coordinate sizes and locations of supports required for fan units.
B.
Coordinate sizes and locations of equipment supports, roof curbs, and roof penetrations.
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1.8
FIELD CONDITIONS A.
1.9
Handling and Storage: Handle and store fan units in accordance with manufacturer's published instructions. Examine units upon delivery for damage. Store units protected from weather. WARRANTY Specifier: Consult TCF for available special Project-specific warranties.
A.
Manufacturer's Warranty: Manufacturer's standard form in which manufacturer agrees to furnish replacement components for fan units that demonstrate defects in workmanship or materials under normal use within warranty period specified. 1.
Warranty Period: 12 months from startup or 18 months from shipment by manufacturer, whichever first occurs.
PART 2 - PRODUCTS 2.1
MANUFACTURER A.
Basis-of-Design Manufacturer: Provide fan units manufactured by Twin City Fan & Blower, Minneapolis MN; (763) 551-7600; email:
[email protected]; website: www.tcf.com.
B.
Source Limitations: Obtain Hinged Restaurant Exhaust fans from a single manufacturer.
2.2
PERFORMANCE REQUIREMENTS A.
Fan Performance Ratings: [Project site elevation-based] [Sea level elevation-based].
B.
AMCA Compliance: Provide units that bear the AMCA-Certified Ratings Seal.
C.
Compliance: 1. 2.
D. 2.3
Classified under AMCA Standard 205. UL listed in accordance with UL 762 for exhaust of grease laden air.
Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70. HINGED RESTAURANT EXHAUST FANS
A.
Description: Belt-Driven, Hinged Restaurant Exhaust Centrifugal Fans, configured for mounting on raised roof curb. 1.
Basis of Design Product: Twin City Fan & Blower, Model BHRE.
B.
Fan Capacities, Characteristics, and Configuration: Refer to Drawing schedule.
C.
Fan Wheel: Non-overloading type, backward inclined, single thickness plate type, designed for maximum efficiency and quiet operation. 1. 2.
D.
Constructed of heavy gauge steel with welded blades. Riveted blades are not acceptable.
Fan Shaft: AISI 1040 or 1045 hot rolled steel, turned, ground, polished and ring gauged. Select shaft diameter so that first critical speed is minimum 1.43 times the maximum fan speed.
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E.
Bearings: Manufacturer's standard field-lubricated ball bearings in pillow blocks. 1.
F.
Minimum L-50 Bearing Life: 200,000 hours at maximum operating speed, in accordance with ABMA 9.
Housing: Formed steel with continuously welded seams. 1. 2. 3. 4. 5. 6. 7.
Fans with lock seams or partially welded construction are not acceptable. Provide bracing to prevent vibration and pulsation. Provide housing with tapered, spun, aerodynamically designed inlet cones or shrouds. Provide permanently attached nameplate displaying unit model and serial number. Lifting Lugs: Weld to fan housing. Vibration Isolators: Support and isolate motor, shaft, bearings, and wheel assembly from unit Curb Cap: One-piece, weather-tight construction, pre-punched mounting holes for correct attachment to roof curb. a. b. c. d.
8.
Discharge Scoop: Sealed to fan housing with high temperature gasket to prevent grease leakage onto roof. Fabricate scoop so it can be easily removed for cleaning and maintenance. a.
G.
Fabricate from steel and include flange to mate with fan unit inlet flange. Include hinge to allow fan service without disassembling fan from curb cap. Include stops at corners to limit rotation. Include handles at corners to assist with lifting fan/curb cap assembly.
Provide 2 inch NPT [50 mm DN] drain welded to bottom of scoop to allow for grease to be collected in grease trough or piped and collected at remote location, as required by applicable codes.
Belt Drives: Specifier: Retain one option in the following paragraph. If both fixed and adjustable sheaves are required for the project, show this on the drawing fan schedule and delete both options from the following paragraph. 1.
2. 3.
H.
Drive Components: V-belt drive, rated for minimum 150 percent of motor nameplate horsepower, with machined, [fixed] [adjustable] cast-iron pulleys, and heat resistant Vbelts. Motor and Drive Assembly: Resiliently mounted on rubber isolators. Outdoor Motor Cover: Encloses motor, drives and bearings from elements. Vents allow ambient air in to cool motor, drives and bearings. Fabricate top panel of motor cover to be removable with simple hand tools for maintenance and inspection of motor and drive components
Motors: Comply with NEMA MG-1 for designation, temperature rating, service factor, enclosure type, and efficiency requirements for motors specified in Division 23 section "Common Motor Requirements for HVAC Equipment." 1. 2.
Motor Sizes: Minimum size as indicated. If not indicated, large enough so driven load will not require motor to operate in service factor range above 1.0. Motor Speed: [3,600] [1,800] [1,200] rpm.
Specifier: Factory disconnect is a standard feature. Select NEMA enclosure rating in following paragraph. NEMA 3R is weather resistant. NEMA 4 is weatherproof and dust tight.
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3.
Furnish unfused disconnect switch, NEMA [3R] [4], selected in accordance with Division 26 section "Enclosed Switches."
Specifier: The disconnect switch is normally shipped loose, for field mounting and wiring. As an option, the disconnect switch can be factory mounted and wired. Select the desired option in the following paragraph. a.
[Ship disconnect switch loose for field mounting and wiring.] [Factory mount and wire disconnect switch.]
Specifier: Select motor electrical data in following subparagraphs, or show this data on the drawing fan schedule. Do not show the data in both places. 4.
Electrical Data: a. b.
Voltage: [115] [208] [230] [460] [_____] V; [1] [3] phase; 60 Hz. Full Load Amps: [_____] A.
Specifier: Select motor enclosure type in first following subparagraph. 5. 6.
Enclosure Type: [Open, Drip Proof (ODP)] [Totally Enclosed Fan Cooled (TEFC)]. Provide motors that comply with the Energy Independence and Security Act of 2007 (EISA).
Specifier: For motors controlled by VFDs, retain the following subparagraph. 7. When controlled with a Variable Frequency Drive (VFD), provide premium efficiency motors suitable for inverter duty use. Specifier: Retain paragraph below for belt-driven units only. I.
Motor Mounting Platform: Heavy-duty motor mounting platform that pivots to allow adjustment of drive belt tension.
J.
Finishes: 1. After fabrication, deburr, clean and chemically pretreat metal parts by phosphatization. 2. Apply two coats of following finish: Specifier: The first paragraph below is manufacturer's standard finish. Those that follow are optional finishes. Select finish that is required. If fans here. 3. 4. 5. 6. 7. 8. 9. 10. 11. 12. 13. 14. 15.
specified for the project have different finishes, include the finish for each fan on the Drawings and delete Air-dried enamel. High-temperature aluminum paint. Asphaltum. Vinyl PVC. Zinc. Air-dried epoxy. Synthetic resin, Santile 855. Air-dried phenolic, Heresite VR 506. Epoxy, Carboguard 890 series. Phenolic epoxy, Plasite 7122L Baked phenolic, Heresite P 413 Coal tar epoxy. High-Build baked epoxy, Skotchkote 324.
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K.
Accessories: Specifier: Accessories listed in subparagraphs below are optional TCF features for this unit. Consult TCF representative for recommended options based upon Project requirements. Specifier: Retain paragraph below when a new roof curb is required. 1.
Roof Curb: Prefabricated, minimum [8 inches (200 mm)] [12 inches (300 mm)] [18 inches (450 mm)] high, vented.
Specifier: Select curb type in the following paragraph to coordinate with the roofing system. a. b.
Provide [self-flashing] [cant], [pitched] type, with 3/16 inch (5 mm) polystyrene gasket. Fabricate with welded seams.
Specifier: Select the following paragraph when there is an existing roof curb, and the whole fan must be raised. Indicate the height of the extension on the drawing fan schedule. 2.
Roof Curb Extension: Provide vented galvanized steel extension as required to extend roof curb height and fan discharge. Select extensions to comply with NFPA discharge height requirements of 40 inches (1,016 mm) above the roof with a 12 inch (300 mm) tall roof curb.
Specifier: Select the following paragraph when there is an existing roof curb for mounting the fan, but the fan discharge is not high enough. Indicate the height of the extension on the drawing fan schedule. 3. Extended Discharge: For applications where it is required to increase unit discharge height. On fan sizes 150 and above, provide access door on top of fan housing to allow access to inside of housing. 4. Swingout Wheel Design: Allow for wheel to pivot out of fan housing for simple cleaning and maintenance. Include rod prop to keep the assembly open, and lockable hasp. 5. Scroll Access Door: Bolted access door on fan scroll to provide access to wheel for cleaning and inspection. Include high temperature gasket to seal access door to scroll. 6. Grease Box: 18 gauge, 0.0516 inch (1.3 mm) thick galvanized steel grease box designed to trap grease in and allow water to run off onto roof. 7. Auto Belt Tensioner: Provide mechanism to keep constant tension on drive belt. Available with single-groove drives only. 2.4
SOURCE QUALITY CONTROL A.
Factory Run Test: Test run assembled fan units prior to shipment at specified operating speed or maximum RPM allowed. Statically and dynamically balance each wheel in accordance with AMCA 204 "Balance Quality and Vibration Levels for Fans" to Fan Application Category BV-3, Balance Quality Grade G6.3. Obtain balance readings by electronic equipment in the axial, vertical, and horizontal directions on each set of bearings. 1.
Submit report of factory run test.
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PART 3 - EXECUTION 3.1
EXAMINATION A.
3.2
Examine areas to receive fans. Notify Engineer regarding conditions that may adversely affect installation, operation, or maintenance of fans. Proceed with installation once conditions are in accordance with manufacturer's published instructions. PROTECTION
A.
Protect adjacent construction and finished surfaces during installation and testing.
B.
Except for operational testing, do not operate fan during construction.
3.3
INSTALLATION A.
Install fans in accordance with Contract documents and manufacturer's published instructions. Specifier: Insert applicable installation requirements for vibration, seismic, and high wind design if applicable to installation.
B.
Install fan units with adequate clearances for service and maintenance. Specifier: Coordinate duct installation and specialty arrangements with schematics on Drawings and with requirements specified in duct systems. If Drawings are explicit enough, these requirements may be reduced or omitted.
C.
Duct Connections: Drawings indicate general arrangement of ducts and duct accessories. Where indicated on Drawings, [install factory-furnished companion flanges and] make final duct connections with flexible connectors. Flexible connectors are specified in Division 23 section "Air Duct Accessories." 1.
D.
Electrical Connections: Connect wiring in accordance with NFPA 70 and Division 26 section "Low-Voltage Electrical Power Conductors and Cables." 1.
E.
3.4
Install connecting ducts with adequate clearances for service and maintenance.
Ground and bond equipment according to Division 26 section "Grounding and Bonding for Electrical Systems."
Equipment Identification: Label units according to Division 23 section "Identification for HVAC Piping and Equipment." FIELD QUALITY CONTROL Specifier: Select option in paragraph below to define the party responsible for final tests and inspections to be performed.
A.
[Owner will retain] [Contractor shall retain] qualified testing agency to perform field tests and inspections. Specifier: Retain first paragraph below to describe tests and inspections to be performed.
B.
Tests and Inspections:
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1.
2. 3.
4. 5. 6. 7.
Verify that unit is secured to supports, and that duct and electrical connections are complete. Verify that proper thermal-overload protection is installed in motors, starters, and disconnect switches. Verify that cleaning and adjusting are complete. Disconnect fan belt drive from motor. Verify proper motor rotation direction, and verify fan wheel free rotation and smooth bearing operation. Reconnect fan drive system, align and adjust belts, and install belt guards. Verify that manual and automatic volume control, and fire and smoke dampers in connected ductwork systems are in fully open position. Disable automatic temperature-control actuators, energize motor, adjust fan to indicated rpm, and measure and record motor voltage and amperage. Shut unit down and reconnect automatic temperature-control actuators. Remove and replace malfunctioning units and retest as specified above.
C.
Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.
D.
Submit test and inspection reports.
3.5
ADJUSTING AND CLEANING A.
Adjust, clean, and maintain installed fan units in accordance with manufacturer's published instructions.
END OF SECTION
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