23 34 00 - HVAC Fans.docx
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- Solicitation number
- 36C25621R0127
About this file
This federal solicitation is seeking proposals to replace refrigerators and freezers at the Overton Brooks VA Medical Center in Shreveport, Louisiana. Offerors must be verified as Service-Disabled Veteran-Owned Small Businesses. The construction cost range for the project is between $500,000 to $1 million. The performance period is 180 days from notice to proceed. Proposals are due around July 7, 2021 in response to solicitation number 36C25621R0127. The work includes all labor, materials and equipment to remove and replace refrigerators and freezers in the Nutrition and Food Service and Pharmacy areas. NAICS code 236220 for commercial and institutional building construction applies. Interested parties must check the SAM website for amendments and attendance at a mandatory site visit is required.
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Text version
SECTION 23 34 00 HVAC FANS
PART 1 - GENERAL
1.1 DESCRIPTION
A. Fans for heating, ventilating and air conditioning.
B. Product Definitions: AMCA Publication 99, Standard l-66.
1.2 RELATED WORK
| A. Section |
| 01 |
| 00 |
| 00, |
| GENERAL REQUIREMENTS. |
| B. Section |
| 01 |
| 33 |
| 23, |
| SHOP DRAWINGS, PRODUCT DATA, and |
| SAMPLES. |
| C. Section |
| 23 |
| 05 |
| 11, |
| COMMON WORK RESULTS FOR HVAC and |
| STEAM GENERATION. |
1.3 QUALITY ASSURANCE
A. Refer to paragraph, QUALITY ASSURANCE, in Section 23 05 11, COMMON WORK RESULTS FOR HVAC and STEAM GENERATION.
B. Fans and power ventilators shall be listed in the current edition of AMCA 26l, and shall bear the AMCA performance seal.
C. Operating Limits for Centrifugal Fans: AMCA 99 (Class I, II, and III).
D. Fans and power ventilators shall comply with the following standards:
l. Testing and Rating: AMCA 2l0.
2. Sound Rating: AMCA 300.
E. Performance Criteria:
l. The fan schedule shall show the design air volume and static pressure. Select the fan motor HP by increasing the fan BHP by 10 percent to account for the drive losses and field conditions.
2. Select the fan operating point as follows:
a. Forward Curve and Axial Flow Fans: Right hand side of peak pressure point
b. Air Foil, Backward Inclined, or Tubular: At or near the peak static efficiency F. Safety Criteria: Provide manufacturer's standard screen on fan inlet and discharge where exposed to operating and maintenance personnel.
G. Corrosion Protection:
1. Except for fans in fume hood exhaust service, all steel shall be mill-galvanized, or phosphatized and coated with minimum two coats, corrosion resistant enamel paint. Manufacturers paint and paint system shall meet the minimum specifications of: ASTM D1735 water fog; ASTM B117 salt spray; ASTM D3359 adhesion; and ASTM G152 and G153 for carbon arc light apparatus for exposure of non-metallic material.
2. Fans for general purpose fume hoods, or chemical hoods, and radioisotope hoods shall be constructed of materials compatible with the chemicals being transported in the air through the fan.
H. Spark resistant construction: If flammable gas, vapor or combustible dust is present in concentrations above 20% of the Lower Explosive Limit (LEL), the fan construction shall be as recommended by AMCA's Classification for Spark Resistant Construction. Drive set shall be comprised of non-static belts for use in an explosive.
1.4 SUBMITTALS
A. Submit in accordance with Section 01 33 23, SHOP DRAWINGS, PRODUCT DATA, and SAMPLES.
B. Manufacturers Literature and Data:
l. Fan sections, motors and drives.
2. Power roof and wall ventilators.
3. Propeller fans.
C. Certified Sound power levels for each fan.
D. Motor ratings types, electrical characteristics and accessories.
E. Maintenance and Operating manuals in accordance with Section 01 00 00, GENERAL REQUIREMENTS.
F. Certified fan performance curves for each fan showing cubic feet per minute (CFM) versus static pressure, efficiency, and horsepower for design point of operation.
1.5 APPLICABLE PUBLICATIONS
A. The publications listed below form a part of this specification to the extent referenced. The publications are referenced in the text by the basic designation only.
B. Air Movement and Control Association International, Inc. (AMCA): 99-86...................Standards Handbook 2l0-06..................Laboratory Methods of Testing Fans for Aerodynamic Performance Rating 26l-09..................Directory of Products Licensed to bear the AMCA Certified Ratings Seal - Published Annually 300-08..................Reverberant Room Method for Sound Testing of Fans C. American Society for Testing and Materials (ASTM):
B117-07a................Standard Practice for Operating Salt Spray (Fog) Apparatus
PROJECT 667-21-101 REPLACE NFS & PHARMACY
REFRIGERATORS AND FREEZERS
VETERANS ADMINISTRATION, SHREVEPORT, LA
02-01-15
23 34 00 -
HVAC FANS
D1735-08................Standard Practice for Testing Water Resistance of Coatings Using Water Fog Apparatus D3359-08................Standard Test Methods for Measuring Adhesion by Tape Test G152-06.................Standard Practice for Operating Open Flame Carbon Arc Light Apparatus for Exposure of Non- Metallic Materials G153-04.................Standard Practice for Operating Enclosed Carbon Arc Light Apparatus for Exposure of Non- Metallic Materials D. National Fire Protection Association (NFPA):
NFPA 96-08..............Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations E. National Sanitation Foundation (NSF):
37-07...................Air Curtains for Entrance Ways in Food and Food Service Establishments F. Underwriters Laboratories, Inc. (UL):
181-2005................Factory Made Air Ducts and Air Connectors
1.6 EXTRA MATERIALS
A. Provide one additional set of belts for all belt-driven fans.
PART 2 - PRODUCTS
2.1 POWER WALL VENTILATOR
A. Standards and Performance Criteria: Refer to Paragraph, QUALITY ASSURANCE.
B. Type: Centrifugal fan, backward inclined blades.
C. Construction: Steel or aluminum, completely weatherproof, for wall mounting, exhaust cowl or entire drive assembly readily removable for servicing, aluminum bird screen on discharge, UL approved safety disconnect switch, conduit for wiring, vibration isolators for wheel, motor and drive assembly. Provide self-acting back draft damper.
D. Motor and Drive: Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC and STEAM GENERATION. Bearings shall be pillow block ball type with a minimum L-50 life of 200,000 hours. Motor shall be located out of air stream.
2.2 PROPELLER FANS
A. Standards and Performance Criteria: Refer to Paragraph, QUALITY ASSURANCE.
B. Belt-driven or direct-driven fans as indicated on drawings.
C. Square steel panel, deep drawn venturi, arc welded to support arms and fan/motor support brackets, baked enamel finish. Provide wall collar for thru-wall installations.
D. Motor, Motor Base and Drive: Refer to Section 23 05 11, COMMON WORK RESULTS FOR HVAC and STEAM GENERATION. Motor shall be totally enclosed type.
E. Wall Shutter: Fan manufacturer's standard, steel frame, aluminum blades, heavy duty stall type electric damper motor, spring closed.
F. Wire Safety Guards: Provide on exposed inlet and outlet.
PART 3 - EXECUTION
3.1 INSTALLATION
A. Install fan, motor and drive in accordance with manufacturer's instructions.
B. Align fan and motor sheaves to allow belts to run true and straight.
C. Bolt equipment to curbs with galvanized lag bolts.
D. Install vibration control devices as shown on drawings and specified in Section 23 05 41, NOISE and VIBRATION CONTROL FOR HVAC PIPING and EQUIPMENT.
3.2 PRE-OPERATION MAINTENANCE
A. Lubricate bearings, pulleys, belts and other moving parts with manufacturer recommended lubricants.
B. Rotate impeller by hand and check for shifting during shipment and check all bolts, collars, and other parts for tightness.
C. Clean fan interiors to remove foreign material and construction dirt and dust.
3.3 START-UP AND INSTRUCTIONS
A. Verify operation of motor, drive system and fan wheel according to the drawings and specifications.
B. Check vibration and correct as necessary for air balance work.
C. After air balancing is complete and permanent sheaves are in place perform necessary field mechanical balancing to meet vibration tolerance.
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