Product Specification Guide
Open Plenum Array, Direct Drive, Model OPA
Facility Services Subgroup: Division 23 (Previously Division 15)

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Specifier Notes: This product specification guide is written in accordance to the Construction Specifications Institute (CSI) Format - 2004 Edition.

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.	Open Plenum Array, Direct Drive, Model OPA

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.	OSHA guideline 1910.212 - General requirements for Machine Guarding. (www.osha.gov)
I.	OSHA guideline 1910.219 - General requirements for guarding safe use of mechanical power transmission apparatus.  (www.osha.gov)
J.	OSHA guideline 1926.300 - General requirements for safe operation and maintenance of hand and power tools. (www.osha.gov)	

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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.	A single sensor orifice to be drilled in the smallest diameter of the inlet cone venturi, provided with a barb for flow tube connection. 
5.	High-pressure flow port(s) by others.

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1.4 	QUALITY ASSURANCE
A.	Air performance shall be tested in accordance to AMCA 210 on individual fan impellers and fan array performance (air flow, static pressure, FRPM and bhp requirements) shall be verified in laboratory testing based on fan array configuration (qty of impellers, diameter, RPM and spacing between impellers). 
B.	Fans are vibration tested to BV-3 in a fan array assembly, individual fan vibration test on a test structure shall not be accepted. Each fan shall be given an electronic vibration analysis in accordance with ANSI/AMCA Standard 204, while operating at the specified fan RPM. Direct drive fans vibration signatures shall be taken on the motor mounting plate in the horizontal, vertical and axial direction. The maximum allowable fan vibration shall be 0.10 in/sec peak velocity for direct drive fans, filter-in as measured at the fan RPM. Report shall be provided at no charge to the customer upon request.

1.5	SUBMITTALS
A.	Provide dimensional drawings and product data on each fan.
B. 	Provide fan curves for each fan at the specified operation point, with the flow, static pressure and horsepower clearly plotted.
C.	Provide 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 one year 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 one year. 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 array performance at standard conditions (density 0.075 lb/ft3).
B.	Arrays selected shall be capable of accommodating static pressure and flow variations of +/-15% of scheduled values.
C.	Each direct drive fan shall be in AMCA arrangement 4 according to drawings.
D.	Array to be equipped with lifting points.

2.2	FAN HOUSING
A.	Fan Array shall be of the direct drive centrifugal type.
B.	Fan plate shall be aerodynamically designed with high-efficiency inlet, engineered to reduce incoming air turbulence.
C.	Panels and framework shall be constructed of heavy gauge, precision laser-cut and die formed galvanized steel to provide a rigid structure to support the motor and wheel reducing low frequency vibration.
D.	Array shall be provided with a minimum 1" insulated foam filled panel.
E.	The entire drive assembly including the inlet cone, wheel and motor assembly shall be mounted rigidly.

2.3	FAN WHEEL
A.	The fan wheel shall be non-overloading airfoil centrifugal or backward curved type. Wheels shall be statically and dynamically balanced to grade G6.3 per ANSI S2.19.
B.	The fan wheel shall be manufactured with a minimum of 7 continuously welded aluminum airfoil blades to move the blade pass frequency into the mid-octave bands.
C.	The entire wheel shall be constructed of aluminum to reduce the rotational weight of the wheel and vibration.  
D.	Aluminum fan wheels shall not require finish coating.
E.	The wheel and fan inlet shall be carefully matched and shall have precise running tolerances for maximum performance and operating efficiency. 

2.4	FAN MOTOR
A.	Motors shall meet or exceed NEMA Premium efficiencies. Motors shall be NEMA T-frame, 1200 or 1800 RPM in 60 Hz [(750, 1000, 1500 or 3000 RPM in 50 Hz)], Open Drip Proof (ODP) [Totally Enclosed Fan Cooled (TEFC)] with a 1.15 service factor. 

PART 3 EXECUTION
3.1	EXAMINATION
A.	Examine areas to receive array. 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 array as indicated on the contract drawings.
B. 	Install array 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,      Open Plenum Array, Direct Drive, Model OPA.