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

Product Specification Guide
Direct Drive High Plume Dilution Blower, Model Vektor-MD
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 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 WORK INCLUDED

A. 	High-Plume Dilution Laboratory Exhaust System, Model Vektor-MD

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.	AMCA Standard 260-07, “Laboratory Methods of Testing Induced Flow Fans for Rating”
F.	ANSI/AMCA Standard 300-08, "Reverberant Room Method for Sound Testing of Fans"
G.	AMCA Publication 311-05, "Certified Ratings Program – Product Rating Manual for Fan Sound Performance"
H.	AMBA Method of Evaluating Load Ratings of Bearings ANSI-11 (r1999)
I.	ANSI/AMCA Standard 500-D-12, "Laboratory Methods of Testing Dampers for Rating"
J.	ANSI/AMCA Standard 500-L-12, "Laboratory Methods of Testing Louvers for Rating"
K.	SMACNA - Medium Pressure Plenum Construction Standard
L.	ANSI/AIHA Z9.5-2012 – Laboratory Ventilation
M.	ASHRAE - Laboratory Design Guide
N.	OSHA guideline 1910.212 – General requirements for Machine Guarding. (www.osha.gov)
O.	OSHA guideline 1910.219 – General requirements for guarding safe use of mechanical power transmission apparatus.  (www.osha.gov)
P.	OSHA guideline 1926.300 – General requirements for safe operation and maintenance of hand and power tools. (www.osha.gov)
Q.	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 location 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 location mounted on the fan housing.
6.	Termination location 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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Specifier Notes:

Fans with a Fan Monitoring System selected shall include the following. 

Fan Monitor shall include all of the following:
1.	NEMA-4 / IP56 Enclosure rating
2.	Factory calibrated, plug and play wiring
3.	120-240 VAC or 24 VAC/VDC input voltage
4.	Two analog sensor inputs using any of the following: 4-20 mA, 0-10 VDC, 2-10 VDC
5.	Three selectable isolated outputs matched to inputs: 4-20 mA, 0-10 VDC, 2-10 VDC
6.	Temperature range: -4 to 140°F (-20 to 60°C)
7.	LCD display with touch panel interface
8.	English or metric readings
9.	ETL Listed

And one of the following sensor packages.
•	Bearing Vibration
•	Current
•	Current and Vibration
•	Bearing Temperature
•	RPM and Current
•	Airstream Temperature and Pressure

Bearing Vibration: Used to detect and monitor vibration on fan shaft bearing(s) or motor bearing.
1.	Velocity vibration sensor, corrosion resistant stainless steel casing
2.	Temperature Range: -40 to 185°F (-40  to 85°C)
3.	Input Voltage: 10 VDC minimum, 30 VDC maximum
4.	Output Signal: 4-20 mA
5.	Accuracy: 5% transverse sensitivity, ±2% repeatability
6.	Each kit includes sensor unit, base and cable.
 Fan monitor programmed with fault setting for alarm and IO for trend analysis indicating bearing condition.

Current Sensor: Used to detect current (amps) usage of motor.
1.	Current sensor with analog output, operating power induced from monitored wiring
2.	NEMA 4/4X, 6 (IP 66/67) polycarbonate mounting enclosure
3.	Temperature Range: 5 to 104°F (-15 to 40°C)
4.	Output Signal: 0-10 VDC
5.	Maximum Motor Current: 100 Amps
6.	Maximum distance from fan monitor: 100 feet (30 m)
7.	Accuracy: ±1%, 2 to 100% FSO
Fan monitor to provide fault setting for alarm, run time value for maintenance and power usage.

Bearing Temperature: Used to detect and monitor temperature on fan shaft bearings.
1.	J type thermocouple terminal ring with wiring
2.	Push button temperature transmitter with LED for visual sensor fault and programming mode
3.	NEMA 4X (IP 66) transmitter mounting enclosure
4.	Temperature Range:
•	Temperature Terminal Ring: 32 to 482°F (0 to 250°C)
•	Transmitter: -4 to 158°F (-20 to 70°C)
5.	Input Voltage: 24 VDC
6.	Output Signal: 4-20 mA
7.	Accuracy: ±0.9°F (±0.5°C)
Fan monitor programmed with fault setting for alarm and IO for trend analysis indicating future bearing health and real-time temperature status reading.

RPM: Used to detect rpm of fan.
1.	Inductive proximity sensor with nickel plated brass construction
2.	Frequency to analog converter and transmitter
3.	NEMA 4X (IP 67) transmitter enclosure
4.	Temperature Range: 32 to 120°F (0 to 50°C)
5.	Input Voltage: 9 VDC minimum, 32 VDC maximum
6.	Output Signal: 4-20 mA
7.	Maximum distance from fan monitor: 100 feet (30 m)
8.	Accuracy: ±0.1%
Fan monitor to provide fault setting for alarm exceeding maximum limit, actual run time and maintenance for fan bearing lubrication, motor lubrication and belt replacement.

Airstream Temperature: Used to detect system process temperature.
1.	Thermocouple stainless steel construction
2.	Push button temperature transmitter with LED for visual sensor fault and programming mode
3.	NEMA 4X (IP 66 with supplied mounting enclosure
4.	Temperature Range:
•	Temperature Probe: -148 to 212°F (-100 to 100°C)
•	Transmitter: -4 to 158°F (-20 to 70°C)
5.	Input Voltage: 24 VDC
6.	Output Signal: 4-20 mA
7.	Accuracy: ±0.9°F (±0.5°C)
Fan monitor to provide a system fault for high and/or low temperature and active status reading.

Pressure: Used to detect system pressure or pressure differential.
1.	Two (2) pressure probes with stainless steel tip and integral mounting bracket
2.	Differential pressure transmitter
3.	NEMA 4X (IP 66) enclosure for transmitter
4.	Temperature Range: 0 to 150°F (-18 to 66°C)
5.	Input Voltage: 10 to 35 VDC
6.	Output Signal: 0 to 10 VDC
7.	Accuracy: ±1%
Fan monitor to provide a system fault alarm and active status reading.

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1.4 QUALITY ASSURANCE

A.	Performance ratings: Conform to ANSI/AMCA Standards 210, 260 and 300. Fans must be tested in accordance with AMCA Publications 211, 260 and 311 in an AMCA accredited laboratory and certified for air and sound performance. Fan shall be licensed to bear the AMCA ratings seal for air performance (AMCA 210), sound performance (AMCA 300), and induced flow fan for high plume dilution blowers (AMCA 260). Manufacturers that are not licensed to bear the AMCA 210 and 260 ratings seal, must provide performance witness testing (at the manufacturer's expense), per paragraph 1.4.D.
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 0.08 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.
D.	Manufacturers that do not comply with paragraph 1.4.A must also provide, at the owner and engineer's option and manufacturer's expense, witness testing of fan discharge and entrainment airflow, performed in an AMCA accredited laboratory, in accordance with AMCA 210 and 260. This test shall verify the critical and safety related dilution performance of the high plume dilution blower, as stated by the manufacturer.

1.5 SUBMITTALS

A.	Provide dimensional drawings and product data on each high-plume dilution 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 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.

2. 	EQUIPMENT

2.1 GENERAL

A.	Base fan performance at standard conditions (density 0.075 Lb. /ft3).
B.	Each fan shall be direct driven in AMCA arrangement 2 according to drawings.
C.	Each fan to be equipped with 316 stainless steel lifting lugs for corrosion resistance.
D.	Fasteners exposed to corrosive exhaust shall be stainless steel.
E.	Curb cap shall be hot rolled steel [316 stainless steel] coated with corrosion resistant coating.
F.	Fan assemblies that use flexible connectors that can fail and cause loss of laboratory containment shall not be acceptable.
G.	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 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 multi-stage wash system which includes acid pickling that removes oxide, increases surface area, and improves coating bond to the substrate.
	The first powder coat applied over the prepared surface shall be a zinc rich epoxy primer (no less than 70% zinc) and heated to a gelatinous consistency (partial cure) at which the second powder coat of polyester resin shall be electrostatically applied and simultaneously be cured at a uniform temperature of 400°F.
	The coating system, a total thickness of up to 6 mils, is not affected by the UV component of sunlight (does not chalk), and has 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 bifurcated, allowing all drive components, including the motor, to be serviced without contact of the contaminated airstream. Must be manufactured of welded steel and meet specification section 2.15 for corrosion resistant coating. No uncoated metal fan parts will be acceptable.
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.	A multi-stage air induction discharge nozzle shall be supplied by the fan manufacturer designed to efficiently handle an outlet velocity of up to 7000 FPM. The multi-stage nozzle shall induce ambient air up to 270% of fan capacity. Nozzle / Wind band assemblies that are manufactured by third party vendors or that are fabricated of plastic or resins, having mechanical properties less than steel shall not be acceptable.
E.	An integral fan housing drain shall be used to drain rainwater when the fan is de-energized. 
F.	A bolted & gasketed access door shall be supplied for impeller inspection and service.
G.	Fan assembly shall be AMCA type C spark resistant construction minimum or as noted on the schedule.

2.3 FAN IMPELLER

A.	Fan impeller shall be mixed flow design with non-stall characteristics. The impeller shall be electronically balanced both statically and dynamically exceeding AMCA Standards.
B.	Fan impeller shall be manufactured of welded and coated steel. Reference specification section 2.15 for corrosion resistant coating.
C.	Fan impellers that are fabricated of polypropylene or fiberglass that have lower mechanical properties than steel, and lower maximum tip speeds are not acceptable.
D.	Vacuum Seal: Fan impeller shall include a secondary fan blade located on the impeller back plate. This secondary impeller shall create a negative pressure at the shaft opening; preventing hazardous or toxic exhaust fumes from escaping through the housing shaft opening. Mechanical shaft seals that wear out and need to be replaced or seal systems that use hoses or tubes that can leak, are not acceptable.

2.4 BYPASS AIR PLENUM

A.	For constant volume systems, the fan / nozzle assembly shall be connected directly to roof curb and exhaust duct without the need of the bypass air plenum. Fans mounted directly to roof curb shall be provided with a damper tray located in the roof curb for mounting of the gravity isolation damper.
B.	For variable volume systems, a bypass air plenum shall be provided 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 and coated 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 factory fabricated roof curb provided by the fan manufacturer, as shown on the project drawings (see section 2.5).
E.	Fan designs that use inlet flexible connectors that can leak causing loss of lab exhaust shall not be permitted.
F.	Bypass air damper(s) shall be opposed-blade design for airflow control, airfoil design, fabricated of galvanized steel [316 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.
G.	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).
H.	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.
I.	Isolation damper actuator(s), if scheduled shall be factory mounted and shall be wired to a step-down transformer.  Actuator and transformer are located in a weatherproof enclosure.
J.	Blower / Plenum vibration isolation shall be limited to neoprene / cork vibration pads.

2.5 BYPASS AIR PLENUM CURB

A.	Exhaust system manufacturer shall supply a structural support curb for the plenum of specified height as shown on the drawings.
B.	Curb shall be fabricated of a minimum of 12 gauge corrosion-resistant coated steel and structurally reinforced.
C.	Curb shall be insulated.
D.	When properly anchored to the roof structure, the standard curb / plenum / blower assembly shall withstand wind loads of up to 125 mph without additional structural support.

2.6 FAN MOTOR AND DRIVE

A.	Motors shall be premium efficiency, standard NEMA frame, 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 maintenance shall be accomplished without fan or fan impeller removal, or requiring maintenance personnel to access the contaminated exhaust components.
C.	Motor mounting shall be “C-face” and / or foot mount.
D.	Drive arrangement shall be AMCA arrangement 2, utilizing a direct mount coupling connecting the motor shaft and fan impeller shaft. Belt drive arrangement 9 or 10, or direct drive arrangement 4 requiring access and handling of hazardous and contaminated fan components are not acceptable.
E.	Fan shaft to be turned and polished of 1040 steel material [316 stainless steel] as standard, coated with corrosion resistant coating.
F.	Fan shaft bearing shall be Air Handling Quality, ball or roller pillow block type, and sized for an 
L-10 life of no less than 200,000 hours.
G.	All shaft bearings and non-permanently lubricated motors shall have nylon [stainless steel braided] extended lube lines with zerk fittings.
H.	Motor, coupling, and bearing shall all be outside the contaminated exhaust, and be capable of replacement without disassembling fan and accessing hazardous and contaminated fan components.

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 fan systems as indicated on the contract drawings.
B.	Pipe housing drain to nearest drain.
C.	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-MD, Direct Drive High Plume Dilution Blower