Product Specification Guide
Belt Driven Airfoil Double Width Centrifugal Fan, Model AFDW
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.	Belt Driven Airfoil Double Width Centrifugal Fan, Model AFDW

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

1.3 	REFERENCES
A.	ANSI/AMCA Standard 99-10, “Standards Handbook” 
B.	ANSI/AMCA Standard 204-05, “Balance Quality and Vibration Levels for Fans”
C.	ANSI/AMCA Standard 210-07, “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 Publication 311-05, “Certified Ratings Program – Product Rating Manual for Fan Sound Performance”
G.	AMBA - Method of Evaluating Load Ratings of Bearings ANSI-11 (r1999).
H.	AMCA Standard 500-D-12, “Laboratory Methods of Testing Dampers for Rating”
I.	OSHA guideline 1910.212 – General requirements for Machine Guarding. (www.osha.gov)
J.	OSHA guideline 1910.219 – General requirements for guarding safe use of mechanical power transmission apparatus.  (www.osha.gov)
K.	OSHA guideline 1926.300 – General requirements for safe operation and maintenance of hand and power tools. (www.osha.gov)
L.	OSHPD – Office of Statewide Health Planning and Development and Special Seismic Certification Preapproval (OSP)
M.	UL/cUL Standard 705, Power Ventilators

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Specifier Notes:

Fans with Sure-Aire Flow Monitoring selected shall include the following.

1.	Flow monitoring station shall monitor the pressure difference between the fan inlet and the smallest diameter of the inlet cone.
2.	Volumetric flow to be calculated from empirically derived formulas based on testing by the fan manufacturer.
3.	Flow monitoring station shall not use air restricting flow devices that reduce fan performance or create additional fan sound.
4.	Four (4) equidistantly spaced sensor orifices to be drilled in the smallest diameter of the inlet cone venturi. Flow tubes from each venturi sensor shall be extended to a termination plate mounted on the fan housing.
5.	High-pressure flow port(s) shall be mounted in low velocity fan inlet. Flow ports from the high-pressure sensor shall extend to a termination plate mounted on the fan housing.
6.	Termination plate shall include a low-pressure connection, a high-pressure connection and a listing of the empirically determined flow rate coefficient.
7.	Flow monitoring station shall accurately measure the pressure differential to within +/- 3%.
8.	Flow monitoring station to be installed by the fan manufacturer as part of the standard fan assembly.
9.	Flow monitoring station to be supplied with electronics package that includes pressure transmitter and LCD digital readout.

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1.4 	QUALITY ASSURANCE
A.	Performance ratings: Conform to ANSI/AMCA Standards 210 and 300. Fans must be tested in accordance with AMCA Publications 211 and 311 in an AMCA accredited laboratory and certified for air and sound performance. Fans shall be licensed to bear the AMCA ratings seal for air performance (AMCA 210) and sound performance (AMCA 300).  
B.	Classification for Spark Resistant Construction shall conform to ANSI/AMCA Standard 99.
C.	Each fan shall be given an electronic vibration analysis in accordance with ANSI/AMCA Standard 204, 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 0.15 in. /sec peak velocity, filter-in as measured at the fan RPM. Report shall be provided at no charge to the customer upon request.
D.	Seismic certification requires each fan shall be shake table tested at an independent test facility, shall meet an Importance Factor of 1.5, an SDS Value of 2.28, all Site Classes, all Occupancy Categories and all Seismic Design Categories (A-F).

1.5	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 outlet velocity of centrifugal fans and both inlet and outlet sound power readings for the eight octave bands. 
D.	Strictly adhere to QUALITY ASSURANCE requirements as stated in section 1.4 of this specification.

1.6	DELIVERY, STORAGE, AND HANDLING
A.	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.	Store materials in a dry area indoor, protected from damage, and in accordance with manufacturer’s instructions. For long term storage, follow manufacturer’s Installation, Operation and Maintenance manual.
C.	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.

1.7	WARRANTY
A.	Submit, for Owner's acceptance, manufacturer's standard warranty document executed by authorized company official. Manufacturer's warranty is in addition to, and not a limitation of, other rights Owner may have under Contract Documents.
1.	The warranty of this equipment is to be free from defects in material and workmanship for a period of 12 months [24 or 36 months] from the purchase date. Any units or parts which prove defective during the warranty period will be replaced at the manufacturers’ option when returned to the manufacturer, transportation prepaid.
2.	Motor Warranty is warranted by the motor manufacturer for a period of 12 months. Should motors furnished prove defective during this period, they should be returned to the nearest authorized motor service station.

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 fan shall be belt drive in AMCA arrangement 3 only according to drawings. 
D.	Fans are to be equipped with lifting lugs.
E.	After fabrication all carbon steel components shall be cleaned and chemically treated by a phosphatizing process to insure proper removal of grease, oil, scale, etc. Fan shall then be coated with a minimum of 2-4 mils of Permatector (Polyester Urethane), electrostatically applied and baked. Finish color shall be RAL 7023, concrete grey. Coating must exceed 1,000-hour salt spray under ASTM B117 test method.

2.2	FAN HOUSING AND OUTLET
A.	Fan housing shall be doublewide to accommodate the airfoil double width wheel.
B.	Fan housing is to be aerodynamically designed with high-efficiency inlet, engineered to reduce incoming air turbulence.
C.	Fan sizes 7 through 49, class I and II, shall be of airtight PermaLockTM Construction with the scroll panel material formed and embedded into the side panels [continuously welded heavy gauge steel]. The housings on all fan sizes greater than 49 shall be of continuously welded heavy gauge steel.  All interior and exterior surface steel shall be coated with a minimum of 2-4 mils of Permatector (Polyester Urethane), electrostatically applied and baked. Finish color shall be RAL 7023, concrete grey. No uncoated metal fan parts will be allowed.
D.	Housing and bearing support shall be constructed of welded structural steel members to prevent vibration and rigidly support the shaft and bearings.
E.	An OSHA compliant belt guard shall be included to completely cover the motor pulley and belt(s).

2.3	FAN WHEEL
A.	The fan wheel shall be of the non-overloading Double Width Airfoil centrifugal type. Wheels shall be statically and dynamically balanced to balance grade G6.3 per ANSI S2.19.  
B.	Fan wheel shall be manufactured with continuously welded steel airfoils and coated with a minimum of 2-4 mils of Permatector (Polyester Urethane), electrostatically applied and baked. Finish color shall be RAL 7023, concrete grey.
C.	The wheel and fan inlet shall be carefully matched and shall have precise running tolerances for maximum performance and operating efficiency.

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) [Totally Enclosed Fan Cooled (TEFC), Explosion Proof (EXP)] 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} [(L-10) of 200,000 hours at maximum operating speed for each pressure class {Average Life or (L-50) of 1,000,000 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’s Installation, Operation and Maintenance manual.

PART 4 ACCEPTABLE MANUFACTURERS
A.	Greenheck Fan Corporation, PO Box 410, Schofield WI 54476-0410, www.greenheck.com 
       Model AFDW, Belt Driven Airfoil Double Width Centrifugal Fans.