BHRE - Hinged Restaurant Exhaust Fans, Belt Driven

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: tcf_sales@tcf.com;
www.tcf.com.
This document Copyright© 2015 Twin City Fan & Blower
Twin City Fan & Blower
Model BHRE
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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: tcf_sales@tcf.com; 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
Twin City Fan & Blower
Model BHRE
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CENTRIFUGAL ROOF VENTILATORS
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