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

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Note to User: This document is subject to copyright protection and is proprietary to Venco Products. However, Venco Products 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 Venco Products 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, Venco Products 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.VencoProducts.com to verify that this document represents the most current version.

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.
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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, levels A, B, and C conform to AMCA 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.

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.	Venco, PO Box 410, Schofield, Wisconsin 54476. Website: www.VencoProducts.com

2.2	DIRECT DRIVE ROOF DOWNBLAST CENTRIFUGAL EXHAUST FANS - VENCO MODEL VECD
A.	General Description:
1.	Downblast fan shall be for roof mounted applications
2.	Performance capabilities up to 14,500 cubic feet per minute (cfm) and static pressure to 2.75 inches of water gauge
3.	Fans are available in seventeen sizes with nominal wheel diameters ranging from 8 inches through 30 inches (060 - 300 unit sizes)
4.	Maximum continuous operating temperature is 130 Fahrenheit (54.4 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:  Item 1 is an AC induction type motor. If specifying this type of motor, delete item 2 (a-f)
Electronically Commutated motor.
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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.	AC Induction Motor
    a.   Motor enclosures: [Open driproof] [Totally enclosed fan cooled] [Explosion resistant
          enclosure]
    b.   Motors are permanently lubricated, heavy duty ball bearing type to match with the fan
          load and furnished at the specific voltage and phase on fan sizes 85 and larger. Fan sizes 60-80 use sleeve bearing.
    c.   Mounted on vibration isolators, out of the airstream
    d.   For motor cooling there shall be fresh air drawn into the motor compartment through
          an area free of discharge contaminants
    e.   Accessible for maintenance
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Specifier Note:  Item 2 is an Electronically Commutated motor (Vari-Green).  If specifying the Vari-Green motor, items a - f below are specific to this motor.  Item 1 (a-e) above (AC induction type motor) should be deleted.
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                    2.    Electronically Commutated Motor
                         a.     Motor enclosures:  Open type
                         b.     Motor to be a DC electronic commutation type motor (ECM) specifically designed for 
                                 fan applications.  AC induction type motors are not acceptable.  Examples of 
                                unacceptable motors are:  Shaded Pole, Permanent Split Capacitor (PSC), Split
                                Phase, Capacitor Start and 3 phase induction type motors.
                         c.     Motors are permanently lubricated, heavy duty ball bearing type to match with the fan 
                                 load and pre-wired to the specific voltage and phase.
                         d.     Internal motor circuitry to convert AC power supplied to the fan to DC power to
                                 operate the motor.
                         e.     Motor shall be speed controllable down to 20% of full speed (80% turndown).  Speed
                                 shall be controlled by either a potentiometer dial mounted at the motor or by a 0-10 
                                 VDC signal.
                          f.     Motor shall be a minimum of 85% efficient at all speeds.
D.	Housing:
1.	Motor cover, shroud, curb cap, and lower windband shall be constructed of heavy gauge aluminum
2.	Shroud shall have an 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
E.	Housing Supports and Drive Frame:
1.	Drive frame assemblies shall be constructed of heavy gauge steel and mounted on vibration isolators
F.	Vibration Isolation:
1.	Rubber isolators 
2.	Sized to match the weight of each fan
G.	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
H.	Options/Accessories:
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Specifier Notes: Specify accessories 1 - 10 required for the exhaust fans. Delete accessories not required. Consult manufacturer for additional information.
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1.	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- Galvanized
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a.	Material Type: [Galvanized] [Aluminum] [Stainless]
b.	Protects fan discharge
2.	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 Venco 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] 
3.	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 Venco 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]
4.	Curb Seal:
a.	Rubber seal between the fan and the roof curb
5.	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
6.	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]
7.	Hinge Kit:
a.	Aluminum hinges
b.	Allows the fan to tilt away for access to wheel and ductwork for inspection and cleaning
8.	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
9.	Pressure Probe:
a.	¼ inch diameter tube in the fan venturi that allows hook up to manometer
10.	Tie-Down Points:
a.	Four heavy gauge aluminum brackets to secure the fan in heavy wind applications

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

3.2	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

3.3	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)

3.4	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

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

3.6	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

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

3.8	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

END OF SECTION 23 34 23