bafbrwhq15840.pdf

SECTION 15840 REPAIR WING HEADQUARTERS, BLDG 706

AIR TERMINAL UNITS CRWU 06-2071

06/09/09 15840-1 BUCKLEY AFB

SECTION 15840 - AIR TERMINAL UNITS

PART 1 - GENERAL

1.01 SUMMARY:

A. Section Includes:

1. Single-duct air terminal units.

1.02 REFERENCES:

A. Applicable Standards (Latest Edition).

1. Air-Conditioning & Refrigeration Institute (ARI):

a. 880 - Air Terminals.

2. American Society of Civil Engineers/Structural Engineering Institute (ASCE/SEI):

a. 7 - Minimum Design Loads for Buildings and Other Structures.

3. American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE):

a. 52.1 - Gravimetric and Dust-Spot Procedures for Testing Air-Cleaning Devices

Used in General Ventilation for Removing Particulate Matter.

b. 52.2 - Method of Testing General Ventilation Air-Cleaning Devices for Removal

Efficiency by Particle Size (ANSI).

c. 62.1 - Ventilation for Acceptable Indoor Air Quality (ANSI).

4. ASTM International (ASTM):

a. A492 - Stainless Steel Rope Wire.

b. A603 - Zinc-Coated Steel Structural Wire Rope.

c. C1071 - Fibrous Glass Duct Lining Insulation (Thermal and Sound Absorbing

Material).

d. E84 - Test Method for Surface Burning Characteristics of Building Materials.

e. E488 - Test Methods for Strength of Anchors in Concrete and Masonry Elements.

5. National Electrical Manufacturers Association (NEMA):

a. 250 - Enclosures for Electrical Equipment (1000 Volts Maximum).

6. National Fire Protection Association (NFPA):

a. 70 - National Electrical Code.

b. 90A - Installation of Air Conditioning and Ventilating Systems.

7. Sheet Metal and Air Conditioning Contractors' National Association (SMACNA):

a. HVAC Duct Construction Standards - Metal and Flexible.

b. Seismic Restraint Manual: Guidelines for Mechanical Systems.

8. Underwriters Laboratories Inc. (UL).

a. 181 - Factory-Made Air Ducts and Air Connectors.

1.03 PERFORMANCE REQUIREMENTS:

A. Structural Performance: Hangers and supports shall withstand the effects of gravity loads and stresses within limits and under conditions described in SMACNA's "HVAC Duct Construction Standards - Metal and Flexible".

1.04 SUBMITTALS:

A. General: Submit the following in accordance with SECTION 15050 - BASIC MECHANICAL

MATERIALS AND METHODS.

B. Product Data: For each type of the following products, including rated capacities, furnished specialties, sound-power ratings, and accessories.

SECTION 15840 REPAIR WING HEADQUARTERS, BLDG 706

BUCKLEY AFB 15840-2 06/09/09

1. Air terminal units.

2. Liners and adhesives.

3. Sealants and gaskets.

C. Field quality-control reports.

D. Operation and Maintenance Data: For air terminal units to include in emergency, operation, and maintenance manuals. In addition to items specified in DIVISION 1, include the following:

1. Instructions for resetting minimum and maximum air volumes.

2. Instructions for adjusting software set points.

1.05 QUALITY ASSURANCE:

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, by a qualified testing agency, and marked for intended location and application.

B. ASHRAE Compliance: Applicable requirements in ASHRAE 62.1, Section 5 - "Systems and

Equipment" and Section 7 - "Construction and System Start-Up."

PART 2 - PRODUCTS

2.01 SINGLE-DUCT AIR TERMINAL UNITS:

A. Manufacturers: Subject to compliance with requirements, provide products by one of the following:

1. Anemostat Products; a Mestek Company.

2. Carnes.

3. Krueger.

4. METALAIRE, Inc.

5. Price Industries.

6. Titus.

7. Trane; a business of American Standard Companies.

8. Tuttle & Bailey.

B. Configuration: Pressure Independent Volume-damper assembly inside unit casing with control components inside a protective metal shroud.

C. Casing: 0.034-inch (0.85-mm) steel, single wall.

1. Casing Lining: Adhesive attached, 1/2-inch- (13-mm-) thick, coated, fibrous-glass duct liner complying with ASTM C1071, and having a maximum flame-spread index of 25 and a maximum smoke-developed index of 50, for both insulation and adhesive, when tested according to ASTM E84.

a. Cover liner with nonporous foil.

2. Air Inlet: Round stub connection or S-slip and drive connections for duct attachment.

3. Air Outlet: S-slip and drive connections.

4. Access: Removable panels for access to parts requiring service, adjustment, or maintenance; with airtight gasket.

5. Airstream Surfaces: Surfaces in contact with the airstream shall comply with requirements in ASHRAE 62.1.

D. Volume Damper: Galvanized steel with peripheral gasket and self-lubricating bearings.

1. Maximum Damper Leakage: ARI 880 rated, 3 percent of nominal airflow at 3-inch wg (750-Pa) inlet static pressure.

2. Damper Position: Normally open.

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E. Hydronic Coils: Copper tube, with mechanically bonded aluminum fins spaced no closer than

0.1 inch (2.5 mm), and rated for a minimum working pressure of 200 psig (1380 kPa) and a maximum entering-water temperature of 220ºF (104ºC). Include manual air vent and drain valve.

F. Direct Digital Controls: Bidirectional damper operators and microprocessor-based controller and room sensor. Control devices shall be compatible with temperature controls specified in SECTION 15900 - HVAC INSTRUMENTATION AND CONTROLS and shall have the following features:

1. Damper Actuator: 24V, powered closed, spring return open.

2. Terminal Unit Controller: Pressure-independent, variable-air-volume controller with electronic airflow transducer with multipoint velocity sensor at air inlet, factory calibrated to minimum and maximum air volumes, and having the following features:

a. Occupied and unoccupied operating mode.

b. Remote reset of airflow or temperature set points.

c. Adjusting and monitoring with portable terminal.

d. Communication with temperature-control system specified in SECTION 15900 -

HVAC INSTRUMENTATION AND CONTROLS.

3. Room Sensor: Wall mounted with temperature set-point adjustment and access for connection of portable operator terminal.

2.02 HANGERS AND SUPPORTS:

A. Hanger Rods for Noncorrosive Environments: Cadmium-plated steel rods and nuts.

B. Steel Cables: Galvanized steel complying with ASTM A603.

C. Steel Cable End Connections: Cadmium-plated steel assemblies with brackets, swivel, and bolts designed for duct hanger service; with an automatic-locking and clamping device.

D. Air Terminal Unit Attachments: Sheet metal screws, blind rivets, or self-tapping metal screws;

compatible with duct materials.

E. Trapeze and Riser Supports: Steel shapes and plates for units with steel casings; aluminum for units with aluminum casings.

2.03 SOURCE QUALITY CONTROL:

A. Factory Tests: Test assembled air terminal units according to ARI 880.

1. Label each air terminal unit with plan number, nominal airflow, maximum and minimum factory-set airflows, coil type, and ARI certification seal.

PART 3 - EXECUTION

3.01 INSTALLATION:

A. Install air terminal units according to NFPA 90A.

B. Install air terminal units level and plumb. Maintain sufficient clearance for normal service and maintenance.

C. Install wall-mounted thermostats.

3.02 HANGER AND SUPPORT INSTALLATION:

A. Comply with SMACNA's "HVAC Duct Construction Standards - Metal and Flexible,"

Chapter 4, "Hangers and Supports."

B. Building Attachments: Concrete inserts, powder-actuated fasteners, or structural-steel fasteners appropriate for construction materials to which hangers are being attached.

SECTION 15840 REPAIR WING HEADQUARTERS, BLDG 706

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1. Where practical, install concrete inserts before placing concrete.

2. Install powder-actuated concrete fasteners after concrete is placed and completely cured.

3. Use powder-actuated concrete fasteners for standard-weight aggregate concretes and for slabs more than 4 inches (100 mm) thick.

4. Do not use powder-actuated concrete fasteners for lightweight-aggregate concretes and for slabs less than 4 inches (100 mm) thick.

C. Hangers Exposed to View: Threaded rod and angle or channel supports.

D. Install upper attachments to structures. Select and size upper attachments with pull-out, tension, and shear capacities appropriate for supported loads and building materials where used.

3.03 CONNECTIONS:

A. Install piping adjacent to air terminal unit to allow service and maintenance.

B. Hot-Water Piping: In addition to requirements in SECTION 15181 - HYDRONIC PIPING, connect heating coils to supply with shutoff valve, strainer, control valve, and union or flange;

and to return with balancing valve and union or flange.

C. Connect ducts to air terminal units according to SECTION 15815 - METAL DUCTS.

D. Connect terminal units to supply ducts using sheet metal ducts. Do not use flexible ducts.

3.04 IDENTIFICATION:

A. Label each air terminal unit with plan number, nominal airflow, and maximum and minimum factory-set airflows. Comply with requirements in SECTION 15075 - MECHANICAL IDENTIFICATION for equipment labels and warning signs and labels.

3.05 FIELD QUALITY CONTROL:

A. Perform tests and inspections.

1. Manufacturer's Field Service: Engage a factory-authorized service representative to inspect components, assemblies, and equipment installations, including connections, and to assist in testing.

B. Tests and Inspections:

1. After installing air terminal units and after electrical circuitry has been energized, test for compliance with requirements.

2. Leak Test: After installation, fill water coils and test for leaks. Repair leaks and retest until no leaks exist.

3. Operational Test: After electrical circuitry has been energized, start units to confirm proper motor rotation and unit operation.

4. Test and adjust controls and safeties. Replace damaged and malfunctioning controls and equipment.

C. Air terminal unit will be considered defective if it does not pass tests and inspections.

D. Prepare test and inspection reports.

3.06 STARTUP SERVICE:

A. Perform startup service.

1. Complete installation and startup checks according to manufacturer's written instructions.

2. Verify that inlet duct connections are as recommended by air terminal unit manufacturer to achieve proper performance.

3. Verify that controls and control enclosure are accessible.

4. Verify that control connections are complete.

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5. Verify that nameplate and identification tag are visible.

6. Verify that controls respond to inputs as specified.

3.07 DEMONSTRATION:

A. Engage a factory-authorized service representative to train Owner's maintenance personnel to adjust, operate, and maintain air terminal units.

END OF SECTION 15840