bafbrwhq15838.pdf

SECTION 15838 REPAIR WING HEADQUARTERS, BLDG 706

POWER VENTILATORS CRWU 06-2071

06/09/09 15838-1 BUCKLEY AFB

SECTION 15838 - POWER VENTILATORS

PART 1 - GENERAL

1.01 SUMMARY:

A. This Section includes the following:

1. In-line centrifugal fans.

1.02 REFERENCES:

A. Applicable Standards (Latest Edition):

1. American Bearing Manufacturers Association (ABMA):

a. 9 - Load Ratings and Fatigue Life for Ball Bearings.

2. Air Movement and Control Association International, Inc. (AMCA):

a. 99 - Standards Handbook.

b. 210 - Laboratory Methods of Testing Fans for Aerodynamic Performance Rating

(ANSI).

c. 300 - Reverberant Room Method for Sound Testing of Fans.

d. 301 - Methods for Calculating Fan Sound Ratings from Laboratory Test Data.

3. NFPA:

a. 70 - National Electrical Code.

4. Underwriters Laboratories Inc. (UL):

a. 705 - Power Ventilators.

1.03 PERFORMANCE REQUIREMENTS:

A. Project Altitude: Base fan-performance ratings on actual Project site elevations.

B. Operating Limits: Classify according to AMCA 99.

1.04 SUBMITTALS:

A. General: Submit each item in this Article in accordance with SECTION 15050 - BASIC

MECHANICAL MATERIALS AND METHODS.

B. Product Data: Include rated capacities, furnished specialties, and accessories for each type of product indicated and include the following:

1. Certified fan performance curves with system operating conditions indicated.

2. Certified fan sound-power ratings.

3. Motor ratings and electrical characteristics, plus motor and electrical accessories.

4. Material thickness and finishes, including color charts.

5. Dampers, including housings, linkages, and operators.

6. Roof curbs.

7. Fan speed controllers.

C. Field quality-control test reports.

D. Operation and Maintenance Data: For power ventilators to include in emergency, operation, and maintenance manuals.

1.05 QUALITY ASSURANCE:

A. Electrical Components, Devices, and Accessories: Listed and labeled as defined in NFPA 70, Article 100, by a testing agency acceptable to authorities having jurisdiction, and marked for intended use.

SECTION 15838 REPAIR WING HEADQUARTERS, BLDG 706

BUCKLEY AFB 15838-2 06/09/09

B. AMCA Compliance: Products shall comply with performance requirements and shall be licensed to use the AMCA-Certified Ratings Seal.

C. NEMA Compliance: Motors and electrical accessories shall comply with NEMA standards.

D. UL Standard: Power ventilators shall comply with UL 705.

1.06 DELIVERY, STORAGE, AND HANDLING:

A. Deliver fans as factory-assembled unit, to the extent allowable by shipping limitations, with protective crating and covering.

B. Disassemble and reassemble units, as required for moving to final location, according to manufacturer's written instructions.

C. Lift and support units with manufacturer's designated lifting or supporting points.

1.07 COORDINATION:

A. Coordinate installation of roof curbs, equipment supports, and roof penetrations. These items are specified in DIVISION 7.

1.08 EXTRA MATERIALS:

A. Furnish extra materials described below that match products installed and that are packaged with protective covering for storage and identified with labels describing contents.

1. Belts: One set for each belt-driven unit.

PART 2 - PRODUCTS

2.01 IN-LINE CENTRIFUGAL FANS:

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

1. Acme Engineering & Mfg. Corp.

2. American Coolair Corp.

3. Bayley Fans; a division of Lau Industries, Inc.

4. Breidert Air Products.

5. Carnes Company HVAC.

6. FloAire.

7. Greenheck.

8. Loren Cook Company.

9. Penn Ventilation.

B. Description: In-line, belt-driven centrifugal fans consisting of housing, wheel, outlet guide vanes, fan shaft, bearings, motor and disconnect switch, drive assembly, mounting brackets, and accessories.

C. Housing: Split, spun aluminum with aluminum straightening vanes, inlet and outlet flanges, and support bracket adaptable to floor, side wall, or ceiling mounting.

D. Belt-Driven Units: Motor mounted on adjustable base, with adjustable sheaves, enclosure around belts within fan housing, and lubricating tubes from fan bearings extended to outside of fan housing.

E. Fan Wheels: Aluminum, airfoil blades welded to aluminum hub.

F. Accessories:

1. Companion Flanges: For inlet and outlet duct connections.

2. Fan Guards: 1/2- by 1-inch (13- by 25-mm) mesh of galvanized steel in removable frame. Provide guard for inlet or outlet for units not connected to ductwork.

SECTION 15838 REPAIR WING HEADQUARTERS, BLDG 706

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3. Motor and Drive Cover (Belt Guard): Epoxy-coated steel.

2.02 MOTORS:

A. Comply with requirements in SECTION 15055 - MOTORS.

B. Enclosure Type: Totally enclosed, fan cooled.

2.03 SOURCE QUALITY CONTROL:

A. Sound-Power Level Ratings: Comply with AMCA 301. Factory test fans according to

AMCA 300. Label fans with the AMCA-Certified Ratings Seal.

B. Fan Performance Ratings: Establish flow rate, pressure, power, air density, speed of rotation, and efficiency by factory tests and ratings according to AMCA 210.

PART 3 - EXECUTION

3.01 INSTALLATION:

A. Install power ventilators level and plumb.

B. Secure roof-mounting fans to roof curbs with cadmium-plated hardware. Refer to

DIVISION 7 for installation of roof curbs.

C. Install units with clearances for service and maintenance.

D. Label units according to requirements specified in SECTION 15075 - MECHANICAL

IDENTIFICATION.

3.02 CONNECTIONS:

A. Duct installation and connection requirements are specified in other Division 15 Sections.

Drawings indicate general arrangement of ducts and duct accessories. Make final duct connections with flexible connectors. Flexible connectors are specified in SECTION 15820 -

DUCT ACCESSORIES.

B. Install ducts adjacent to power ventilators to allow service and maintenance.

C. Ground equipment in accordance with DIVISION 16.

D. Connect wiring in accordance with DIVISION 16.

3.03 FIELD QUALITY CONTROL:

A. Perform the following field tests and inspections and prepare test reports:

1. Verify that shipping, blocking, and bracing are removed.

2. Verify that unit is secure on mountings and supporting devices and that connections to ducts and electrical components are complete. Verify that proper thermal-overload protection is installed in motors, starters, and disconnect switches.

3. Verify that cleaning and adjusting are complete.

4. Disconnect fan drive from motor, verify proper motor rotation direction, and verify fan wheel free rotation and smooth bearing operation. Reconnect fan drive system, align and adjust belts, and install belt guards.

5. Adjust belt tension.

6. Adjust damper linkages for proper damper operation.

7. Verify lubrication for bearings and other moving parts.

8. Verify that manual and automatic volume control and fire and smoke dampers in connected ductwork systems are in fully open position.

9. Disable automatic temperature-control operators, energize motor and adjust fan to indicated rpm, and measure and record motor voltage and amperage.

SECTION 15838 REPAIR WING HEADQUARTERS, BLDG 706

BUCKLEY AFB 15838-4 06/09/09

10. Shut unit down and reconnect automatic temperature-control operators.

11. Remove and replace malfunctioning units and retest as specified above.

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

3.04 ADJUSTING

A. Adjust damper linkages for proper damper operation.

B. Adjust belt tension.

C. Refer to SECTION 15950 - TESTING, ADJUSTING, AND BALANCING for testing, adjusting, and balancing procedures.

D. Replace fan and motor pulleys as required to achieve design airflow.

E. Lubricate bearings.

END OF SECTION 15838