Product Specification Guide
Model GB Belt Drive Roof Downblast Centrifugal Exhaust Fan
Facility Services Subgroup: Division 23 Section 23 34 23

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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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1.	GENERAL

1.1	SUMMARY

A.	Section Includes:  HVAC Power Ventilators
B.	Related Sections:
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Specifier Notes: Delete any sections below not relevant to this project; add others as required.
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1.	01 00 00 General Requirements
2.	07 00 00 Thermal and Moisture Protection
3.	09 00 00 Finishes
4.	23 00 00 Heating, Ventilating, and Air-Conditioning (HVAC)
5.	26 00 00 Electrical

1.2	REFERENCES

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Specifier Notes: Delete references from the list below that are not actually required by the text of the edited section.
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A.	Air Movement and Control Association Inc. (AMCA):
1.	99 - Standards Handbook
2.	200 - Publication, Air Systems
3.	201-90 - Publication, Fans and Systems
4.	202-88 - Publication, Troubleshooting
5.	203-90 - Publication, Field Performance Measurement of Fan Systems
6.	211-05 - Publication, Certified Ratings Program – Product Rating Manual for Fan Air Performance
7.	300-96 - Standard Reverberant Room Method for Sound Testing of Fans
8.	311-05 - Publication Certified Ratings Program – Product Rating Manual for Fan Sound Performance
9.	99-0401-86 - Classification for Spark Resistant Construction
10.	99-2408-69 - Operating Limits for Centrifugal Fans
B.	Air Movement and Control Association Inc. (AMCA), American National Standards Institute (ANSI):
1.	204-05 - Standard Balance Quality and Vibration Levels for Fans
2.	210-99 - Standard Laboratory Methods of Testing Fans for Aerodynamic Performance Rating
C.	American National Standards Institute (ANSI):
1.	11-r1999 - Method of Evaluating Load Ratings of Bearings 
D.	American Society of Civil Engineers (ASCE):
1.	7-02 - Minimum Design Loads for Building and Other Structures
E.	American Society of Heating, Refrigerating and Air Conditioning Engineers, Inc. (ASHRAE):
1.	Chapter 45 - 2003 handbook, HVAC Applications
2.	Chapter 7 - 2001 Fundamentals handbook, Sound-Vibration
3.	Chapter 32 - 2001 Fundamentals handbook, Duct Design
4.	Chapter 18 - 1992 HVAC System and Equipment handbook, Fans
F.	American Society for Testing and Materials (ASTM):
1.	E330-02 - Standard Test Method for Structural Performance of Exterior Windows, Doors, Skylight and Curtain Walls by Uniform Static Air Pressure Difference
G.	National Fire Protection Association (NFPA)
1.	70 - National Electrical Code
2.	90A-02 - Standard for the Installation of Air-Conditioning and Ventilating Systems
3.	92A-06 - Recommend Practice for Smoke-Control System
4.	92B-05 - Standard for Smoke Management System in Malls, Atria, and Large Areas
5.	96-04 - Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations
H.	Occupational Safety and Health Administration (OSHA):
1.	1910.212 - General requirements for Machine Guarding
2.	1910.219 - General requirements for guarding safe use of mechanical power transmission apparatus
3.	1926.300 - General requirements for safe operation and maintenance of hand and power tools
I.	Underwriters Laboratories (UL):
1.	507 - Electric Fans
2.	555 - Fire Dampers
3.	555S - Smoke Dampers
4.	705 - Standard Power Ventilators
5.	705 – Supplement SC - Standard Power Roof Ventilators for Restaurant Exhaust Appliances
6.	793 - Snow Load

1.3	SUBMITTALS

A.	General: Submit in accordance with Section 01 33 00 Submittal Procedures
B.	Provide dimensional drawings and product data on each fan.
C.	Provide fan curves for each fan at the specified operation point, with the flow, static pressure and horsepower clearly plotted.
D.	Provide outlet velocity and fan's inlet sound power readings for the eight octave bands, decibels, and sones.
E.	Strictly adhere to QUALITY ASSURANCE requirements as stated in section 1.04 of this specification.
F.	Provide manufacturer's certification that exhaust fans are licensed to bear Air Movement and Control Association (AMCA), Certified Rating Seal for sound and air performance
G.	Installation, Operation, and Maintenance Manual (IOM): Provide manufacturer's installation, operations, and maintenance manual, including instructions on installation, operations, maintenance, pulley adjustment, receiving, handling, storage, safety information and cleaning. A troubleshooting guide, parts list, warranty and electrical wiring diagrams

1.4	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 and sound performance seal
B.	Classification for Spark Resistant Construction shall conform to the intent of ANSI/AMCA Standard 99.
C.	Each fan shall be given a balancing analysis which is applied to wheels at the outside radius.  The maximum allowable static and dynamic imbalance is 0.05 ounces (Balance grade of G6.3).
D.	Comply with the National Electrical Manufacturers Association (NEMA), standards for motors and electrical accessories.
E.	The High Wind models have been analyzed and stamped by a state license P.E. to the ASCE 7-02 Standard which meets the IBC, Florida and Miami-Dade codes.
F.	Each High Wind model is subject to be certified by a third party to the ASTM E330 Static Pressure Difference Standard.
G.	All High Wind models have been analyzed using Computational Fluid Dynamics (CFD). The CFD simulates the flow of high speed (150MPH) winds over the surface of objects.
H.	The Finite Element Analysis (FEA) is the results from the CFD and it can accurately predict the stress, strain, and deflection resulting from high wind loads.

1.5	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. For long term storage follow manufacturer's Installation, Operations, and Maintenance Manual.
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.

1.6	WARRANTY

A.	Manufacturer's Warranty: 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 Manufacturer, transportation prepaid.
2.	Motor Warranty is warranted by the motor manufacturer for a period of one year.  Should motors furnished by us prove defective during this period, they should be returned to the nearest authorized motor service station.

1.7	MAINTENANCE

A.	Refer to Manufacturer's Installation, Operation and Maintenance Manual (IOM), to find maintenance procedures.

2.	PRODUCTS

2.1	MANUFACTURER

A.	Greenheck, PO Box 410, Schofield, Wisconsin 54476. Phone (715) 359-6171.                           Fax (715)355-2399. Website: www.greenheck.com

2.2	BELT DRIVE ROOF DOWNBLAST CENTRIFUGAL EXHAUST FANS - GREENHECK MODEL GB

A.	General Description:
1.	Downblast fan shall be for roof mounted applications
2.	Performance capabilities up to 44,700 cubic feet per minute (cfm) and static pressure to 2.5 inches of water gauge
3.	Fans are available in twenty sizes with nominal wheel diameters ranging from 11 inches through 54 inches (097 - 540 unit sizes)
4.	Maximum continuous operating temperature is 180 Fahrenheit (82.2 Celsius)
5.	Each fan shall bear a permanently affixed manufacture's engraved metal nameplate containing the model number and individual serial number.
B.	Wheel:
1.	Constructed of aluminum
2.	Non-overloading, backward inclined centrifugal 
3.	Statically and dynamically balanced in accordance to AMCA Standard 204-05
4.	The wheel cone and fan inlet will be matched and shall have precise running tolerances for maximum performance and operating efficiency
C.	Motors:
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Specifier Note: Edit the following motor enclosures to fit the requirements of the project:
1.	Open driproof (ODP)-opening in the frame body and or end brackets.
2.	Totally enclosed fan cooled (TEFC) - no opening in the frame or brackets. Equipped with an external fan to blow air over the motor.
3.	Explosion resistant enclosure (EXP) - totally enclosed motor, with a housing constructed to contain any explosion within the motor caused by the hazardous atmosphere entering the enclosure and being ignited.
Consult manufacturer for additional information. *************************************************************************************************************
1.	Motor enclosures: [Open driproof] [Totally enclosed fan cooled] [Explosion resistant enclosure]
2.	Motors are permanently lubricated, heavy duty ball bearing type to match with the fan load and furnished at the specific voltage and phase.
3.	Mounted on vibration isolators, out of the airstream.
4.	For motor cooling there shall be fresh air drawn into the motor compartment through an area free of discharge contaminants.
5.	Accessible for maintenance
D.	Shafts and Bearings:
1.	Fan shaft shall be ground and polished solid steel with an anti corrosive coating
2.	Permanently sealed bearings or pillow block ball bearings 
3.	Bearing shall be selected for a minimum L10 life in excess of 100,000 hours (equivalent to L50 average life of 500,000 hours), at maximum cataloged operating speed.
4.	Bearings are 100 percent factory tested.
5.	Fan Shaft first critical speed is at least 25 percent over maximum operating speed.
E.	Housing:
1.	Motor cover, shroud, curb cap, and lower windband shall be constructed of heavy gauge aluminum.
2.	Shroud shall have a integral rolled bead for extra strength.
3.	Shroud shall be drawn from a disc and direct air downward.
4.	Lower windband shall have a formed edge for added strength.
5.	Motor cover shall be drawn from a disc.
6.	All housing components shall have final thicknesses equal to or greater then preformed thickness..
7.	Curb cap shall have pre-punched mounting holes to ensure correct attachment.
8.	Rigid internal support structure.
9.	Leak proof
F.	Housing Supports and Drive Frame:
1.	Drive frame assemblies shall be constructed of heavy gauge steel and mounted on vibration isolators
G.	Vibration Isolation:
1.	Double studded or pedestal mount true isolators
2.	No metal to metal contact
3.	Sized to match the weight of each fan
H.	Disconnect Switches:
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Specifier Notes: Edit the following Disconnect Switches to meet project requirements: Factory Mounted and Shipped loose for field mounting, National Electrical Manufacturers Association (NEMA):
1.	NEMA 1: indoor application no water. Factory standard.
2.	NEMA 3R: outdoor application falling rain water.
3.	NEMA 4: outdoor application hose directed water.
4.	NEMA 4X:  same as NEMA 4, but corrosion resistant.
5.	NEMA 7 and 9: Explosion resistant indoor and outdoor use.
6.	NEMA 12: Industrial use, dust-tight, and drip-tight, oil resistant for indoor use.
Consult manufacturer for additional information.
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1.	NEMA rated: [1] [3R] [4] [4X] [7 and 9] [12]
2.	Positive electrical shut-off
3.	Wired from fan motor to junction box installed within motor compartment
I.	Drive Assembly
1.	Belts, pulleys, and keys oversized for a minimum of 150 percent of driven horsepower
2.	Belts: Static free and oil resistant
3.	Fully machined cast iron type, keyed and securely attached to the wheel and motor shafts
4.	The motor pulley shall be adjustable for final system balancing
5.	Readily accessible for maintenance
J.	Options/Accessories:
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Specifier Notes: Specify accessories 1 - 11 required for the exhaust fans. Delete accessories not required. Consult manufacturer for additional information.
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1.	Auto Belt Tensioner:
a.	Automatic tensioning device that adjusts for the correct belt tension, only for single drives
2.	Birdscreen:
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Specifier Notes: Edit the following Birdscreen material to meet the requirements of the project. Consult manufacturer for additional information. Factory Standard is galvanized.
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a.	Material Type: [Galvanized] [Aluminum] [Stainless]
b.	Protects fan discharge
3.	Roof Curbs:
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Specifier Notes: Edit item 1 for the following roof curbs to fit project requirements:
1.	GPI- Welded, straight sided curb with 2 inches of flashing flange and wood nailer 
2.	GPF- Welded, straight side curb with no wood nailer
3.	GPNS- tabbed and riveted curb with 45 degree cant and wood nailer
4.	GPS- Welded curb with 45 degree cant and wood nailer
5.	GPIP- For pitched roofs, welded straight side curb with 2 inch flashing flanges and wood nailer
6.	GPFP- For pitched roofs, welded straight side curb with no wood nailer
Edit Items 3 through 5 to meet project requirements. Consult Greenheck for additional information on ridged and sound curbs.
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a.	Types: [GPI] [GPF] [GPNS] [GPS] [GPIP] [GPFP] 
b.	Mounted onto roof with fan
c.	Material: [Aluminum] [Galvanized]
d.	Insulation thickness:  [No insulation] [1 inch] [1.5 inches]
e.	Flashing Flange: [2] [5] inch
f.	Coating Type: [None] [Permatector] [Hi-Pro Polyester] [Macropoxy with UV top coat] 
4.	Curb Extension:
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Specifier Notes: Edit the following curb extension to meet the requirements of the project:
1.	GPE- bolted access door and damper holding tray.
2.	GPEX- curb extension without access door or damper tray.
3.	ISB- Insect screen base with removable insect screen for cleaning.
4.	ATE- Sound Curb extension with sound baffles.
Consult Greenheck for additional information.
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a.	Type: [GPE] [GPEX] [ISB] [ASE]
b.	Material Type: [Aluminum] [Galvanized]
c.	Coating: [None] [Permatector] [Hi-Pro Polyester] [Macropoxy with UV top coat]
5.	Curb Seal:
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Specifier Notes: Edit the following finishes to meet project requirements:  
1.	Foam Seal – dense foam tape seal.  
2.	High Temp Seal – Amorphous silica fiber tape seal, rated for continuous duty at 1500 degrees Fahrenheit.
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a.	Types: [None] [Foam Seal] [High Temp Seal] 
b.	Typically mounted between the fan curb cap and the roof curb
6.	Dampers:
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Specifier Notes: Specify gravity or motorized backdraft dampers.  Specify damper size based on specified fan size. Consult manufacturer for additional information.
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a.	Type: [Gravity] [Motorized]
b.	Prevents outside air from entering back into the building when fan is off
c.	Balanced for minimal resistance to flow
d.	Galvanized frames with prepunched mounting holes
7.	Finishes: 
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Specifier Notes: Edit the following finishes to meet project requirements:
1.	Permatector - thermo-setting polyester urethane
2.	Hi-Pro Polyester- Meets or exceeds the chemical resistance properties of Air Dry Phenolic (heresite)
3.	Macropoxy with UV top coat- Epoxy coating with chemical resistance to a wide variety of chemicals
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a.	Types: [None] [Permatector] [Hi-Pro Polyester] [Macropoxy with UV top coat]
8.	Hinge Kit:
a.	Aluminum hinges
b.	Allows the fan to tilt away for access to wheel and ductwork for inspection and cleaning
9.	Hinge Base:
a.	Aluminum hinges
b.	Hinges and restraint cables are mounted to a base (sleeve)
c.	Allows the fan to tilt away for access to wheel and ductwork for inspection and cleaning
10.	Pressure Probe:
a.	¼ inch diameter tube in the fan venturi that allows hook up to manometer
11.	Tie-Down Points:
a.	Four heavy gauge aluminum brackets to secure the fan in heavy wind applications
12.	Variable Frequency Drive
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Specifier Notes: The accessories listed below for Variable Frequency Drive are not required of each fan, only of fans containing a Vari-GreenTM Drive Model 100.  Delete accessories not required.  Consult manufacturer for additional information.
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a.	Factory programed, mounted and wired
b.	Input speed control [Potentiometer dial] [4-20mA] [0-10VDC]
c.	24VDC damper power output
d.	24VDC control power output
e.	Motor: (VFD Rated) compatible with induction and permanent magnet motors
f.	Parameters of acquainted motor shall be set to include voltage, speed, FLA, acceleration/deceleration time, and minimum & maximum motor frequency
g.	R3 Filtering for harmonic mitigation
h.	UL Recognized for 3 phase input at [208V] or [380-480V]
i.	NEMA 4X Enclosure
j.	LED indication for Power, Run, and Fault
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Specifier Notes: The accessories listed below for Variable Frequency Drive are not required of each fan, only of fans containing a Vari-GreenTM Drive Model 100+. Delete accessories not required. Consult manufacturer for additional information. 
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a.	Factory programed, mounted and wired
b.	Input speed control [Potentiometer dial], [4-20mA] or [0-10VDC]
c.	24VDC damper power output
d.	24VDC control power output
e.	4 digital inputs
f.	2 digital outputs
g.	Bluetooth connectivity with Vari-Green Drive companion app
h.	BACnet/Modbus communication points
i.	Motor: (VFD Rated) compatible with induction and permanent magnet motors
j.	Parameters of acquainted motor shall be set to include voltage, speed, FLA, acceleration/deceleration time, and minimum & maximum motor frequency
k.	R3 Filtering for harmonic mitigation
l.	UL Recognized for 3 phase input at [208-240V] or [380-480V]
m.	NEMA 4X Enclosure
n.	LED indication for Power, Run and Fault

2.	EXECUTION

2.1	MANUFACTURER'S INSTRUCTIONS
A.	Compliance: Comply with manufacturer's product data, including technical bulletins, product catalog installation instructions

2.2	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

2.3	PREPARATION
A.	Ensure roof openings are square, accurately aligned, correctly located, and in tolerance
B.	Ensure duct is plumb, sized correctly, and to proper elevation above roof deck. Install duct as specified in Air Distribution (Division 23)

2.4	INSTALLATION
A.	Install fans system as indicated on the Installation, Operation and Maintenance Manual (IOM) and contract drawings
B.	Install fans in accordance with manufacturer's instructions

2.5	SYSTEM STARTUP
A.	Refer to Installation, Operation, and Maintenance Manual (IOM)

2.6	ADJUSTING
A.	Adjust exhaust fans to function properly
B.	Adjust Belt Tension
C.	Lubricate bearings
D.	Adjust drive for final system balancing
E.	Check wheel overlap

2.7	CLEANING
A.	Clean as recommended by manufacturer. Do not use material or methods which may damage finish surface or surrounding construction

2.8	PROTECTION
A.	Protect installed product and finished surfaces from damage during construction
B.	Protect installed exhaust fans to ensure that, except for normal weathering, fans will be without damage or deterioration at time of substantial completion

Section 1.01	END OF SECTION 23 34 23