Product Specification Guide
Model Backward Curved Single Width FRP Centrifugal Fans
Facility Services Subgroup: Division 23 (Previously Division 15)

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Specifier Notes: This product specification guide is written according to the Construction Specifications Institute (CSI) Format.

This section must be carefully reviewed and edited by the Engineer to meet the requirements of the project and local building code.  Coordinate with other specification sections and the drawings.

Delete all unnecessary “Specifier Notes” when editing this section. 

Note to User: This document is subject to copyright protection and is proprietary to Greenheck Fan Corporation. However, Greenheck Fan Corporation authorizes the user a limited non-exclusive license to use this document or portions of it for the purpose of preparing written product specifications for the above CSI MasterFormat category. All information in this document as provided by Greenheck Fan Corporation is informational in nature and is provided without representation or warranty of any kind as to the user or any other party, including, without limitation, ANY IMPLIED WARRANTY OF MERCHANTABILITY, FITNESS FOR PARTICULAR PURPOSE, OR NON-INFRINGEMENT. To the greatest extent permitted by applicable law, Greenheck Fan Corporation assumes no liability, and User assumes all liability and risk, for the use or results from the use of this document or the information contained herein, whether as modified by the user or not. Users should consult www.greenheck.com to verify that this document represents the most current version.

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PART 1	GENERAL
1.1 	WORK INCLUDED  
A.	Backward Curved, Single Width, Belt or Direct Drive FRP Centrifugal Fan, Model BCSW-FRP

1.2 	RELATED SECTIONS 
A.	All sections, drawing plans, specifications and contract documents.

1.3 	REFERENCES
A.	AMCA 99, “Standards Handbook” 
B.	ANSI/AMCA Standard 204-96, “Balance Quality and Vibration Levels for Fans”
C.	ANSI/AMCA Standard 210-99, “Laboratory Methods of Testing Fans for Aerodynamic Performance Rating”
D.	AMCA Publication 211-05,  “Certified Ratings Program – Product Rating Manual for Fan Air Performance”
E.	AMCA Standard 300-08, “Reverberant Room Method for Sound Testing of Fans”
F.	AMCA Standard 301-06, "Methods for Calculating Fan Sound Ratings from Laboratory Test Data"
G.	AMBA - Method of Evaluating Load Ratings of Bearings ANSI-11 (r1999).
H.	OSHA guideline 1910.212 – General requirements for Machine Guarding. (www.osha.gov)
I.	OSHA guideline 1926.300 – General requirements for safe operation and maintenance of hand and power tools. (www.osha.gov)
J.	OSHA guideline 1910.219 – General requirements for guarding safe use of mechanical power transmission apparatus.  (www.osha.gov)
K.	ASTM Specification D4167 – 97, Standard for Fiber-Reinforced Plastic Fans and Blowers
L.	ASTM Specification C582-09, Standard Specification for Contact-Molded Reinforced Thermosetting Plastic (RTP) Laminates for Corrosion-Resistant Equipment
M.	ASTM Specification D2563-08, Standard Practice for Classifying Visual Defects in Glass-Reinforced Plastic Laminate Parts.

1.4	SUBMITTALS
A.	Provide dimensional drawings and product data on each centrifugal fan.
B. 	Provide fan curves for each fan at the specified operation point, with the flow, static pressure and horsepower clearly plotted.
C.	Provide inlet sound power readings for the eight octave bands.
D.	Strictly adhere to QUALITY ASSURANCE requirements as stated in section 1.5 of this specification.

1.5 	QUALITY ASSURANCE
A.	Performance ratings: Conform to AMCA standard 211 and 311.  Fans must be tested in accordance with ANSI/AMCA Standard 210-99 and AMCA Standard 300-96 in an AMCA accredited laboratory.  Fans shall be certified to bear the AMCA label for air performance.  
B.	Classification for Spark Resistant Construction Conform to AMCA 99.
C.	Fans will be manufactured in accordance with ASTM Specifications D4167, C582, and D2563
D.	Each fan shall be given an electronic vibration analysis in accordance with ANSI/AMCA Standard 204-96, while operating at the specified fan RPM.  The vibration signatures shall be taken on each bearing in the horizontal, vertical and axial direction. The maximum allowable fan vibration shall be 0.078 in/sec peak velocity for belt drive (and 0.05 in/sec peak velocity for direct drive), filter-in as measured at the fan RPM.  Report shall be provided at no charge to the customer upon request.

1.6	DELIVERY, STORAGE, AND HANDLING
A.	Delivery: Deliver materials to site in manufacturer’s original, unopened containers and packaging, with labels clearly indicating manufacturer, material, products included, and location of installation.
B.	Storage: Store materials in a dry area indoor, protected from damage, and in accordance with manufacturer’s instructions.
C.	Handling: Handle and lift fans in accordance with the manufacturer’s instructions.  Protect materials and finishes during handling and installation to prevent damage.  Follow all safety warnings posted by the manufacturer.

PART 2 PRODUCTS
2.1	GENERAL
A.   	Base fan performance at standard conditions (density 0.075 Lb/ft3).
B.	Fans selected shall be capable of accommodating static pressure and flow variations of +/-15% of scheduled values.
C.	Each belt drive fan shall be in AMCA arrangement 9, 9H or 10 according to drawings. Each direct drive fan shall be AMCA arrangement 4 or 8 according to drawings.
D.	Fans are to be equipped with lifting points.
E.	All FRP surfaces are ground smooth prior to top coating to ensure there are no exposed glass fibers.  All hardware located within the airstream will be made of stainless steel and encapsulated in FRP.  Finish color shall be gray.  No exposed metal parts in the airstream will be allowed.

2.2	FAN HOUSING AND OUTLET
A.	Fan housing is to be aerodynamically designed with high-efficiency inlet, engineered to reduce incoming air turbulence.
B.	The housings on all fan sizes shall conform to PS 15-96 FRP construction standards.  They will be made using fire retardant vinylester resins.  All interior surfaces of the housing exposed to the airstream will be resin rich and contain no more than 20% of “C” grade glass veil.   The exterior surfaces of the housing will be resin rich and use a paraffinated resin stabilized against ultraviolet degradation.    No exposed metal parts will be allowed within the airstream.   The finish color will be gray.
C.	Housing and bearing support shall be constructed of welded structural steel members to prevent vibration and rigidly support the shaft and bearings bearings and coated with enamel or epoxy to prevent corrosion.
D.	For belt drive fans, an OSHA compliant belt guard and shaft guard shall be included to completely cover the sheaves and belt(s).
E.	Housings for sizes 6 through 25 are fully rotatable.

2.3	FAN WHEEL
A.	The fan wheel shall be of the non-overloading single width backward curved centrifugal type.  Wheels shall be statically and dynamically balanced to balance grade G6.3 per ANSI S2.19.  
B.	Fan wheel shall be manufactured from a FRP encapsulated steel hub and backplate with FRP blades strapped in for added strength.  The wheels will be made using a non-fire retardant resin chosen for strength characteristics.  Finish color shall be gray.
C.	The wheel and fan inlet shall be carefully matched and shall have precise running tolerances for maximum performance and operating efficiency.
D.	The shaft to impeller connection is EXTERNAL to the gas stream with the encapsulated hub extending out of the housing using a taper-Lock bushing for the physical connection. Neither the shaft nor the shaft-impeller connection is exposed to the gas stream.  The impeller hub is encapsulated with mat and resin.

2.4	FAN MOTORS AND DRIVE
A.	Motors shall meet or exceed EPACT (Energy Policy ACT) efficiencies.  Motors to be NEMA T-frame, 1800 or 3600 RPM, Open Drip Proof (ODP) or Totally Enclosed Fan Cooled (TEFC) with a 1.15 service factor. 
B.	Drive belts and sheaves shall be sized for 150% of the fan operating brake horsepower, and shall be readily and easily accessible for service, if required. 
C.	Fan shaft to be turned and polished steel that is sized so the first critical speed is at least 25% over the maximum operating speed for each pressure class.
D.	Fan shaft bearings shall be Air Handling Quality, bearings shall be heavy-duty grease lubricated, self-aligning or roller pillow block type.  
E.	Air Handling Quality bearings to be designed with low swivel torque to allow the outer race of the bearing to pivot or swivel within the cast pillow block.  Bearings shall be 100% tested for noise and vibration by the manufacturer.  Bearings shall be 100% tested to insure the inner race diameter is within tolerance to prevent vibration.
F.	Bearings shall be selected for a basic rating fatigue life (L-10) of 80,000 hours at maximum operating speed for each pressure class {Average Life or (L-50) of 400,000 hours}.  
G.	Bearings shall be fixed to the fan shaft using concentric mounting locking collars, which reduce vibration, increase service life, and improve serviceability.  Bearings that use set screws shall not be allowed. 
H.	Bearings shall have Zerk fittings to allow for lubrication.

PART 3 EXECUTION
3.1	EXAMINATION
A.	Examine areas to receive fans.  Notify the Engineer of conditions that would adversely affect installation or subsequent utilization and maintenance of fans.  Do not proceed with installation until unsatisfactory conditions are corrected.

3.2	INSTALLATION
A.  	Install fans systems as indicated on the contract drawings.
B. 	Install fans in accordance with manufacturer instructions.

PART 4 ACCEPTABLE MANUFACTURERS
A.	Greenheck Fan Corporation, PO Box 410, Schofield WI 54476-0410, www.greenheck.com, Backward Curved, Single Width, Belt or Direct Drive FRP Centrifugal Fan, Model BCSW-FRP.