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

Product Specification Guide
Belt Drive Energy Recovery High Plume Blower, Model Vektor-ERS MH
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 Laboratory Exhaust System, Model Vektor-ERS MH

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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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 and certified for air and sound performance. Fan shall be licensed to bear the AMCA ratings seal for air performance (AMCA 210) and sound performance (AMCA 300). Manufacturers that are not licensed to bear the AMCA 210 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 0.10 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.
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 airflow, performed in an AMCA accredited laboratory, in accordance with AMCA 210. This test shall verify the critical and safety related performance of the high plume blower, as stated by the manufacturer.

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 one year [two years, three years] from the date of shipment shall be provided on the fan(s) only. 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 selected shall be capable of accommodating static pressure and flow variations of +/-15% of scheduled values.
C.	Each fan shall be belt driven in AMCA arrangement 9 according to drawings.
D.	Each fan to be equipped with 316 stainless steel lifting lugs for corrosion resistance.
E.	Fasteners exposed to corrosive exhaust shall be stainless steel.
F.	Curb cap shall be hot rolled steel [316 stainless steel] coated with corrosion resistant coating.
G.	Fan assemblies that use flexible connectors that can fail and cause loss of laboratory containment shall not be acceptable.
H.	Fan assembly shall be designed for a minimum of 125-mph wind loading, without the use of guy wires.
I.	Motor cover shall be hinged with removable side panels for ease of maintenance to allow the servicing of the motor and drive.

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 shall 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.
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 high velocity discharge nozzle shall be supplied by the fan manufacturer designed to efficiently handle an outlet velocity of up to 7000 FPM. Discharge stack caps or hinged covers, impeding exhaust flow shall not be permitted.
E.	An integral fan housing drain shall be used to drain rainwater when the fan is de-energized.
F.	An access door shall be supplied for impeller inspection and service.
G.	Fan assembly shall be AMCA type C spark [B 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 [aluminum]. Reference 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 ENERGY RECOVERY COIL PLENUM

A.	The energy recovery coil plenum shall be provided as shown on drawings.
B.	ERS Cabinet Sizes 5, 8, 15
1.	The coil plenum casing shall be secured to and fully supported by fan bypass air plenum.
2.	Plenum construction consists of bolted, double wall insulated panels for walls, floor, and roof. Construction shall be specifically designed for outdoor installation.
3.	Panels shall be two inch double-wall, 22 gauge and polyester coated galvanized outer and inner walls. Plenum insulation shall be no less than 2 Lb. /ft3, two inch thick foam in place polyurethane for additional structural rigidity. Panels shall be individually removable.
4.	Plenum roof panels shall be pitched away from fan bypass air plenum. Panel edges shall extend beyond the edge of the plenum casing to ensure water drainage.
5.	Fasteners exposed to corrosive exhaust shall be zinc plated.
6.	Filter racks shall be coated steel. Filters will be mounted for side access and are sized for a maximum face velocity of 500 ft./min. Filter efficiency shall be two inch - MERV 8 [two inch - MERV 13] as specified.
7.	Courtesy drain shall be provided under coil.

C.	ERS Cabinet Sizes 20, 30, 40, 60
1.	The plenum casing deflection shall not exceed L/250 at the design total static pressure (where L is the longest panel span on the unit).   
2.	Plenum construction consists of an all-welded structural steel base, a stainless steel tube and double wall insulated panels for walls, floor, interior partitions and roof. Construction shall be specifically designed for outdoor installation.
3.	Plenum unit base shall be constructed of welded structural steel with removable lifting lugs. Base shall be coated with corrosion resistant grey urethane modified enamel.
4.	Panels shall be two inch double-wall, 18 gauge polyester coated galvanized outer walls and 22 gauge, 304 stainless steel inner walls. Plenum insulation shall be no less than 2 Lb. /ft3, two inch thick foam in place polyurethane for additional structural rigidity. Panels shall be individually removable. Plenum floor shall be insulated with foam in place fiberglass insulation.
5.	Plenum roof panels shall be a standing seam assembly fabricated of corrosion resistant 18 gauge corrosion resistant polyester coated pre-treated galvanized, and sloped. Panel edges shall extend beyond the edge of the plenum casing to ensure water drainage.
6.	Fasteners exposed to corrosive exhaust shall be stainless steel.
7.	Insulated double wall access doors, hinged and gasketed with tooled-entry handles shall be provided for access to any plenum areas requiring routine maintenance, both upstream and downstream of coil and filters, as shown on the project drawings.
8.	A filter section shall be provided at the air inlet of the energy recovery coil plenum. Filter racks shall be 304 stainless steel. Filters will be mounted for side access and are sized for a maximum face velocity of 500 ft./min. Filter efficiency shall be two inch - MERV 8 [four inch - MERV 13] as specified.
9.	Drain pan shall be 18ga, 304 stainless steel with raised coil supports.
10.	Plenums with optional external mounted coil connections are sealed to insure low-air leakage of the negatively pressurized plenum.

2.5 ENERGY RECOVERY COIL

A.	An ARI-410-2001 rated energy recovery coil(s) shall be provided within the energy recovery coil plenum, performance parameters as specified in the schedule.
B.	The coil shall be constructed of a seamless copper tube primary surface with a wall thickness of 0.025 inch and an aluminum plate fin sine-wave surface with a thickness of 0.008 inch.
C.	The coil shall be provided with copper headers and MPT carbon steel coil connections. 
D.	ERS Cabinet Sizes 5, 8, 15
1.	The coil casing shall be constructed of 16 ga. galvanized steel.
2.	The coil and frame shall be corrosion resistant eCoated with epoxy.
E.	ERS Cabinet Sizes 20, 30, 40, 60
1.	The coil casing shall be constructed of 304 stainless steel.
2.	The coil shall be corrosion resistant coated with baked Heresite Phenolic resin (P413C).
F.	Each coil is water immersion tested to 450 PSI prior to shipment.

2.6 PLENUM CURB

A.	Plenum manufacturer shall supply a structural support curb for the plenum of specified height as shown on drawings.
B.	Curb shall be fabricated of a minimum of 12 gauge welded steel, structurally reinforced and coated with LabCoat™.
C.	Curb shall be internally insulated with one inch thick, 6 Lb. /ft3 density insulation.
D.	When properly anchored to the roof structure, the curb and plenum assembly shall withstand wind loads of up to 125 mph without additional structural support.

2.7 FAN BYPASS AIR PLENUM
 
A.	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.
B.	The plenum shall be a double-wall construction, LabCoat™ coated exterior with a stainless steel inner liner or optional steel walls with LabCoat™. Optional single wall construction with a coated steel inner liner or all stainless steel construction is also available. Coating must meet specification section 2.15 for corrosion resistant coating. Plenums fabricated of plastics or resins which are combustible and have mechanical properties less than steel shall not be acceptable.
C.	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 2.6).
D.	Fan designs that use inlet flexible connectors that can leak causing loss of lab exhaust shall not be permitted.
E.	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.
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(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.
I.	Blower / Plenum vibration isolation shall be limited to neoprene / cork vibration pads.

2.8 FAN MOTORS 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 impeller removal or requiring maintenance personnel to access the contaminated exhaust components. Drive arrangement shall be AMCA arrangement 9. Direct drive arrangement 4, or direct drive arrangements requiring access and handling of hazardous and contaminated fan components for motor replacement are not acceptable.
C.	Drive belts and sheaves shall be sized for 200% of the fan operating brake horsepower, and shall be readily and easily accessible for service, if required. Drive shall consist of a minimum of two belts under all circumstances.
D.	Fan shaft to be turned and polished of 1040 steel material [316 stainless steel] as standard, coated with corrosion resistant coating.
E.	Fan shaft bearings shall be Air Handling Quality, ball or roller pillow block type and be sized for an 
L-10 life of no less than 200,000 hours. Bearings shall be fixed to the fan shaft using concentric mounting locking collars, which reduce vibration, increase service life, and improve serviceability. Bearings that use setscrews shall not be acceptable.
F.	All shaft bearings and non-permanently lubricated motors shall have nylon [stainless steel braided] extended lube lines with Zerk fittings.
G.	Belt drive motors shall have ventilated motor cover. Motor cover shall be hinged with removable side panels for ease of maintenance to allow the servicing of the motor and drive(s).

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-ERS MH, Laboratory Energy Recovery Belt Drive High Plume Blower System.