SECTION 15820

ELCTRONIC AIR MEASURING STATION

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PART 1  	GENERAL

1.1	SECTION INCLUDES

A.	Electronic air measuring station.

1.2	RELATED SECTIONS

A.	Section 10200 – Louvers.

B.	Section 15810 - Ducts.

C.	Section 15900 - HVAC Instrumentation and Controls.

1.3	REFERENCES

A.	AMCA 500 - Test Methods for Louvers, Dampers and Shutters.

B.	AMCA 611 - Certified Ratings Program - Airflow Measurement Performance.

C.	ASHRAE 62 - Ventilation for Acceptable Indoor Air Quality.

1.4	SUBMITTALS

A.	Submit under provisions of Section 01300.

B.	Product Data:  For each product to be used, including,
1.	Manufacturer's product data.
2.	Verification of calibration performed in AMCA registered laboratory.
3.	Preparation instructions and recommendations.
4.	Storage and handling requirements and recommendations.
5.	Installation methods.

C.	Shop Drawings:
1.	Submit shop drawings indicating materials, construction, dimensions, accessories, wiring schematics and installation details.

1.5	QUALITY ASSURANCE

A.	Manufacturer Qualifications:
1.	The manufacturer shall have implemented the management of quality objectives, continual improvement, and monitoring of customer satisfaction to assure that customer needs and expectations are met.
2.	Manufacturer shall be International Organization for Standardization (ISO) 9000 accredited.

B.	Installer Qualifications:

C.	Product Qualifications:
1.	Individually calibrated to proper airflow set points and airflow curve in AMCA registered laboratory in accordance with AMCA 611. 
2.	Licensed to bear the AMCA Certified Ratings Seal.
3.	Pressure Drop Ratings:  Damper pressure drop ratings based on tests and procedures performed in accordance with AMCA 500. 

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, and location of installation.

B.	Store materials in a dry area indoors, protected from damage and in accordance with manufacturer's instructions.

C.	Handling:  Protect materials and finishes during handling and installation to prevent damage.

D.	Store and dispose of solvent-based materials, and materials used with solvent-based materials, in accordance with requirements of local authorities having jurisdiction.

1.7	PROJECT CONDITIONS

A.	Maintain environmental conditions (temperature, humidity, and ventilation) within limits recommended by manufacturer for optimum results.  Do not install products under environmental conditions outside manufacturer's absolute limits.

1.8	WARRANTY

A.	Manufacturer shall provide standard limited warranty for station systems for a period of 1 year from date of installation, no more than 18 months after shipment from manufacturing plant. When notified in writing from the Owner of a manufacturing defect, manufacturer shall promptly correct deficiencies without cost to the Owner.  

PART 2  	PRODUCTS

2.1	MANUFACTURERS

A.	Acceptable Manufacturer:  Ruskin Company; 3900 Dr. Greaves Road, Kansas City, Missouri 64030. Tel: (816) 761-7476.  

B.	Substitutions:  Not permitted.

C.	Requests for substitutions will be considered in accordance with provisions of Section 01600.

2.2	ELECTRONIC AIR MEASURING STATION

A.	Model:  EAMS as manufactured by Ruskin Company.

B.	Size: As indicated on drawings.
1.	Sleeve Length: 12 inches (305 mm).

C.	Construction: 
1.	Frame Material: Galvanized steel, aluminum or stainless steel as required..
2.	Frame Fabrication: Minimum 16 gage steel or 1.6 mm aluminum.
3.	Air Scoop Manifold: aluminum with ABS plastic fittings or copper with copper fittings. 
4.	Electronic Sensor: Heated mass flow sensor.

D.	Operation:
1.	Electronic Controller: The controller shall provide a linear 0-20mA output proportional to the measured air flow..
2.	Output Signal: 0-20 mA, 
3.	External current loop resistance:250 ohms maximum.
4.	Set Point: Factory programmed minimum, maximum operating range within the product’s operating range.. 
5.	Set Point: Unit shall be designed for 4-20mA default or optional, 2-10V or 1-5V using 500 ohm or 250 ohm resistor. Refer to schedules for operating range and design CFM set points.
6.	Power Requirements: 24VAC, -15%, +20%, 25VA,.
7.	Transformer: Provide transformer integral to unit.
a.	Primary – 120V/40VA.
b.	Secondary – 24VAC output.

E.	Performance Data:
1.	Assembly:  Factory assemble components and furnish as a single factory calibrated unit.
2.	Humidity Limit: 99% Non-condensing.
3.	Maximum Operating Temperature:
a.	Sensor: Process air in airstream. 0 degrees F (-20 degrees C) to +140 degrees F (+60 degrees C).
b.	Transmitter: Ambient air. 32 degrees F (0 degrees C) to +120 degrees F (+49 degrees C).
4.	Accuracy: Per AMCA 610 based on 100 FPM to 2000 FPM.
a.	±3 Percent: Temperature compensated within operating range 
b.	Stated accuracy only obtained when air measurement station is installed per manufacture’s recommendations.  

PART 3  	EXECUTION

3.1	EXAMINATION

A.	Inspect areas to receive stations.  Notify the Architect of conditions that would adversely affect the installation or subsequent utilization of the stations.  Do not proceed with installation until unsatisfactory conditions are corrected.

B.	If opening preparation is the responsibility of another installer, notify Architect of unsatisfactory preparation before proceeding.

3.2	INSTALLATION

A.	Install stations at locations indicated on the drawings and in accordance with manufacturer's instructions.
1.	Do not connect output signal to a controller with an internal power supply or use an external supply in the current loop. The 0-20mA current output loop is powered from within the controller. Connecting an external supply to the current loop may destroy the transmitter.

B.	Handle airflow station using sleeve or frame.  Do not lift airflow measurement station by the  air flow manifold

	END OF SECTION