P.O. Box 410
Schofield, WI 54476
Phone: 715.359.6171
www.greenheck.com

Product Specification Guide
Model Vektor-CS Direct Drive High Plume Blower
Facility Service Subgroup: Division 23 HVAC (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 Master Format 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 WORK INCLUDED

A.	High-Plume Laboratory Exhaust System, Model Vektor-CS

1.2 RELATED WORK 

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.	ANSI/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.	ANSI/AMCA Standard 500-D-12, "Laboratory Methods of Testing Dampers for Rating"
I.	ANSI/AMCA Standard 500-L-12, "Laboratory Methods of Testing Louvers for Rating"
J.	SMACNA - Medium Pressure Plenum Construction Standard
K.	ANSI/AIHA Z9.5-2012 – Laboratory Ventilation
L.	ASHRAE - Laboratory Design Guide
M.	OSHA guideline 1910.212 – General requirements for Machine Guarding. (www.osha.gov)
N.	OSHA guideline 1910.219 – General requirements for guarding safe use of mechanical power transmission apparatus.  (www.osha.gov)
O.	OSHA guideline 1926.300 – General requirements for safe operation and maintenance of hand and power tools. (www.osha.gov)
P.	UL 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.	Two (2) 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.
10.	Material:
•	Tubing: black polyethylene, UV resistant, chemically inert tubing, interior and exterior (standard), Temperature range: -100 - 175°F (-73 - 80°C)
•	Tube Fittings: Stainless steel compression fittings, interior. Brass compression fittings, exterior

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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.
B.	Classification for Spark Resistant Construction shall conform to ANSI/AMCA Standard 99.
C.	Each fan shall be vibration tested before shipping, as an assembly, in accordance with ANSI/AMCA Standard 204. Each assembled fan shall be test run at the factory at the specified fan RPM and vibration signatures shall be taken on each bearing in three planes - horizontal, vertical, and axial. The maximum allowable fan vibration shall be less than 0.10 in. /sec peak velocity; filter-in reading as measured at the fan RPM. This report shall be provided at no charge to the customer upon request.

1.5 SUBMITTALS

A.	Provide dimensional drawings and product data on each high-plume laboratory exhaust fan assembly.
B.	Provide fan curves for each fan at the specified operation point, with the flow, static pressure and horsepower clearly plotted.
C.	Provide nozzle velocity of exhaust fan, total exhaust flow, and discharge plume rise at specified wind velocity.
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. Should motors furnished prove defective during this period, they should be returned to the nearest authorized motor service station.

2. EQUIPMENT

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 direct driven in AMCA arrangement 4 according to drawings.
D.	Fans to be equipped with 316 stainless steel lifting lugs for corrosion resistance.
E.	Fasteners exposed to corrosive exhaust shall be 316 stainless steel.
F.	Fan assembly shall be designed for a minimum of 125-mph wind loading, without the use of guy wires.

2.15 CORROSION RESISTANT COATING

A.	All steel fan and system components (fan, nozzle, windband and plenum) shall be corrosion resistant coated with LabCoat™, a two-part electrostatically applied and baked, sustainable, corrosion-resistant coating system. Standard finish color to be RAL 7023, concrete grey.
All parts shall be cleaned and chemically prepared for coating using a multistage wash system which includes acid pickling to remove oxide, improving the coating bond to the substrate.
The first powder coat applied over the prepared surface shall be an epoxy primer. After application, the coating shall be heated to a gelatinous consistency (partial cure) at which time the second powder coat of polyester resin shall be electrostatically applied and then be cured simultaneously at a uniform temperature of 400°F (204°C).
The coating system shall not be less than a total thickness of 6 mils, shall not be affected by the UV component of sunlight (does not chalk), and have superior corrosion resistance to acid, alkali, and solvents. Coating system shall exceed 4000-hour ASTM B117 Salt Spray Resistance.
Note that 10-20 mil thick wet coating systems pollute the environment (air and water), and that these manually applied coatings are not uniform over the impeller surface and can cause fan imbalance and vibration.

2.2 FAN HOUSING AND OUTLET

A.	Fan housing to be aerodynamically designed with high-efficiency inlet, engineered to reduce incoming air turbulence.
B.	Fan housing shall be centrifugal involute scroll and manufactured of welded steel allowing motor to be visually inspected without contacting or entering the contaminated airstream. Housing to be corrosion resistant coated per specification section 2.15. Arrangement 4 has fan wheel directly coupled to the motor shaft.
C.	Fan housings that are fabricated of polypropylene or fiberglass that have lower mechanical properties than steel, have rough interior surfaces in which corrosive, hazardous compounds can collect, and / or which chalk and structurally degrade due to the UV component of the sunlight shall not be acceptable.
D.	Exhaust fan inlet venturi to include factory supplied, non-invasive flow monitoring system with differential pressure transducer.
E.	An integral fan housing drain shall be used to drain rainwater when the fan is de-energized. 
F.	A bolted housing access door shall be supplied for impeller inspection.
G.	Fan assembly shall be AMCA type C spark [B spark] resistant construction minimum or as noted on the schedule.

2.25 VARIABLE NOZZLE

A.	Factory assembled fan discharge nozzle with variable discharge area capable of maintaining constant discharge velocity at variable fan volumes.
B.	Nozzle housing and adjustable blade to be heavy gauge steel construction. Variable nozzle coating shall meet specification section 2.15 for corrosion resistant coating in the Laboratory Exhaust Fan specification.
C.	Moveable discharge blade to include adjustable blade seals between the blade body and nozzle housing.
D.	The adjustable discharge blade pivot points shall utilize sealed bearings that are located outside of the airstream.
E.	The nozzle assembly to include a factory supplied and mounted modulating electrical actuator to adjust nozzle discharge area. Actuator to be enclosed within a weatherproof cover.
F.	Modulating electric actuator is 24V.

2.27 ELECTRICAL CONTROLS

A. 	Fan manufacturer to include discharge nozzle blade position controller.
B.	Controller to have NEMA 3R rated enclosure and factory programmed for job specific operation.
C.	Controller converts pressure differential transducer signal into volume. 
D.	Controller operator interface with keypad navigation displays fan run status, fan volume and nozzle blade percent open position and permits adjustment to settings. Input of 2-10 VCD signal from building management system permits adjustment of discharge velocity as required. 
E.	Single controller capable of monitoring fan volume and adjusting nozzle damper blade position for constant discharge velocity on up to four fans simultaneously.
F.	Controller to provide analog outputs for nozzle position, fan volume and alarm status. 
G.	Variable frequency drive, isolation damper and bypass damper actuators independently controlled through building management system.

2.3 FAN IMPELLER

A.	Fan wheel shall be centrifugal, single width, single inlet, backward inclined airfoil blade design with non-stall characteristics. The wheel shall be electronically balanced both statically and dynamically exceeding AMCA Standards.
B.	Fan wheel shall be manufactured of aluminum. Wheel shall be coated with 2 - 3 mils of chemically resistant Hi-Pro Polyester resin, electrostatically applied and baked. Reference specification section 2.15 for corrosion resistant coating.
C.	Fan wheels that are fabricated of polypropylene or fiberglass that have lower mechanical properties than steel, and lower maximum tip speeds are not acceptable.

2.4 BYPASS AIR PLENUM

A.	For constant volume systems, the fan / nozzle assembly shall be connected directly to exhaust duct without the need of the bypass air plenum.
B.	For variable volume systems, the fan manufacturer shall provide a bypass air plenum as shown on drawings. The plenum shall be provided with bypass air damper(s) for introducing outside air at roof level upstream of the fan, complete with bypass air weatherhood and bird screen.
C.	The plenum shall be constructed of welded steel and meet specification section 2.15 for corrosion resistant coating. Plenums that are fabricated of plastics or resins that are combustible and have mechanical properties less than steel shall not be acceptable.
D.	The bypass air plenum shall be mounted on an insulated curb. 
E.	Bypass air damper(s) shall be opposed-blade design for airflow control, airfoil design, fabricated of galvanized steel [304 stainless steel] for structural rigidity as standard.  Bypass damper(s) shall have plated steel damper rods, stainless steel sleeved bearings, 301 stainless steel jamb seals and the blades shall have polymer edge seals. Damper model shall be equal to or exceed a heavy-duty control damper, Greenheck HCD-130. Damper blade drive linkage shall be set by manufacturer and welded to eliminate linkage slippage. All damper access and service (drive actuators) shall be performed outside of the contaminated airstream.
F.	If stated in the schedule notes, an optional, integral bypass air packed acoustic attenuator fabricated of galvanized steel [galvanneal or stainless steel construction] shall be provided by the fan manufacturer (if shown on the drawings).
G.	Fan isolation damper(s), shall be parallel-blade design, airfoil design, fabricated of steel [304 stainless steel construction] for structural rigidity as standard. Damper(s) shall be coated up to 4 mils of chemically resistant Hi-Pro Polyester resin, electrostatically applied and baked. Isolation damper(s) shall have plated steel damper rods (if specified as 304 stainless steel damper, stainless steel damper rods will be provided), stainless steel sleeved bearings, 301 stainless steel jamb seals and the blades shall have polymer edge seals. Damper model shall be equal to or exceed a heavy-duty control damper, Greenheck HCD-130. Damper blade drive linkage shall be set by manufacturer and welded to eliminate linkage slippage. All damper access and service (drive actuators) shall be performed outside of the contaminated airstream.
H.	Isolation damper actuator shall be a 24V, two-position actuator and be factory mounted and shall be wired to a step-down transformer.  Actuator and transformer are located in a weatherproof enclosure.
I.	Plenum shall include a removable bypass air weatherhood that is properly sized for low inlet velocity of the bypass air, minimizing the possibility of moisture entrainment.
J.	Bypass plenum to include a bypass damper with modulating actuator controlled by building management system.

2.5 FAN MOTORS AND DRIVE

A.	Motors shall be premium efficiency, standard NEMA frame, 1200, 1800 or 3600 RPM, TEFC with a 1.15 service factor. A factory-mounted NEMA 3R [NEMA 4X] disconnect switch shall be provided for each fan.
B.	Motor shall be manufactured to be compatible for use with a VFD. Motor shall include a motor manufacturer mounted shaft grounding brush to protect the motor bearings and dissipate voltages and currents built up on motor shaft.
C.	Motor maintenance shall be limited to a period of 12 months of continuous operation. Lubrication shall be limited to the motor bearings. 
D.	Motor mounting shall be “C-face” and foot mounted for reduced vibration being transferred to the fan housing.
E.	Drive arrangement shall be AMCA arrangement 4, utilizing a tapered bushing connecting the motor shaft to wheel. 
F.	   Motor bearing life calculations by the motor vendor indicating motor bearing life in excess of L(10) of 100,000 hrs. at maximum operating speed for each fan class {Average life or (L-50) of 500,000 hours} 
G.	All non-permanently lubricated motors shall have nylon [stainless braided] extended lube lines with zerk fittings.

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.	Fans shall be mounted on vibration isolators, furnished by the fan manufacturer, in accordance with those specified in specification section 1.4.C of this document.
C.	Blower inlet shall be connected to the bypass air plenum utilizing a corrosion resistant UV inhibited flexible polymer boot, utilizing stainless steel straps, furnished by the fan manufacturer. Pipe housing drain to nearest drain.
D.	Install fans in accordance with manufacturer's Installation, Operation and Maintenance manual.

4. 	ACCEPTABLE MANUFACTURERS

A.	Greenheck Fan Corporation, PO Box 410, Schofield WI 54476-0410, www.greenheck.com               Model Vektor-CS, Direct Drive High Plume Dilution Blower.