A. The work consists of furnishing a Chiller Noise Reduction System as listed in the specifications.

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1 SECTION PART 1 - GENERAL 1.01 RELATED DOCUMENTS A. Drawings and general provisions of the Contract, including General and Supplementary Conditions and Division 1 Specification Sections, apply to this Section. B. State of Connecticut Codes and regulations WORK INCLUDED A. The work consists of furnishing a Chiller Noise Reduction System as listed in the specifications. B. Pre-fabricated, pre-engineered acoustical enclosure system including footing support system, framing and acoustical panels designed and manufactured by the manufacturer to accommodate approved chiller. The enclosure shall be free standing and designed to reduce chiller noise to levels specified herein. The manufacturer shall be responsible for the complete design and layout of the enclosure system. System layout shown on the drawings indicates the location of the chiller and the enclosure. Final layout, footing and framing locations, and anchor locations shall be field verified prior to shop drawings design. Any changes to the approved layout shall be consulted with the Engineer prior to release for production SUBMITTALS A. Product Data: 1.04 REQUIREMENTS A. Single Source Requirements: 1. Provide a Chiller Noise Reduction System from a single manufacturer. B. Manufacturer Qualifications: 1. Company specializing in the manufacture of acoustical systems and related accessories with not less than 20 years documented successful experience with work comparable to work of this project. 2. Design Requirements: a. Design system to meet chiller manufacturers published data pertaining to heat loss of compressors, condenser fan airflow, and ensure no de-rating of chiller performance. b. Design system to meet all environmental conditions such as temperature, wind, shrinkage, UV-rays, and moisture. South Windsor, Connecticut

2 1.05 SUBMITTALS A. Manufacturer s original catalog cut sheets and material description for each sub-component incorporated into the system. B. Shop Drawings for Factory-Fabricated acoustical system. Include plans, elevations, sections and details. C. Shop Drawings: Signed and sealed by a qualified professional engineer registered in the state where the installation is performed. 1. Calculate that noise reduction levels comply with the levels specified herein. Design the enclosure for the approved chiller in a manner that noise levels specified herein are met. 2. Show dimensional layout and elevation of the frame system supporting the acoustical panels, panels, gates, foundation support, frame to foundation connection detail. Design foundation independent from the chiller pad components. Provide supporting calculations. Coordinate installation with the chilled water support system. 3. Drawings and calculations shall be signed and sealed by the professional engineer licensed in the State of Connecticut. D. Welding certificates for field welders if field welding is required. E. Manufacturer Certificates: Signed by manufacturers certifying that the installed system complies with requirements. F. Product Certificates: For concrete and steel used. G. Material Certificates. H. Warranties: Special warranties specified in this Section QUALITY ASSURANCE A. Welding: Qualify procedures and personnel according to ASME Boiler and Pressure Vessel Code: Section IX. B. Factory Supervision: Factory trained field technical assistance shall be provided for critical periods of the installation DELIVERY, STORAGE, AND HANDLING A. Store at Project site as recommended by manufacturer to prevent physical damage. Arrange so identification markings are visible PROJECT CONDITIONS A. Existing Utilities: Do not interrupt utilities serving facilities occupied by Owner or others unless permitted under the following conditions and then only after arranging to provide temporary utility services according to requirements indicated: South Windsor, Connecticut

3 1. Do not proceed with utility interruptions without Architect's and Owner's written permission COORDINATION A. Coordinate installation with removal of overhead utility wires and the remaining underground gas service WARRANTY A. General Warranty: The special warranty specified in this Article shall not deprive the Owner of other rights the Owner may have under other provisions of the Contract Documents and shall be in addition to, and run concurrent with, other warranties made by the Contractor under requirements of the Contract Documents. 1. Warranty Period: Manufacturer's standard, but not less than 15 years from date of substantial completion. PART 2 - PRODUCTS 2.01 BASIC OF DESIGN MANUFACTURER A. BRD Noise and Vibration Control, Inc., 112 Fairview Avenue, Wind Gap, PA, 18091, Phone: (610) , Fax: (610) , brd@epix.net, Website: MATERIALS 1. Acoustical Metal Panel System shall be pre-fabricated, sectional, modular and designed for easy and accurate assembly and disassembly. The acoustical panels and other components, such as noise control louvers and plenums, are to be designed to completely surround the air cooled chiller on four sides and top as required to comply with acoustical performance specified herin. The panels shall be designed in a structural steel frame complete with eight feet (8 ) wide operable access doors and trim components. Design system to provide seven feet (7 ) maximum column span. All structural steel and accessories shall be hot dip galvanized. 2. Metal Acoustical Panels shall be constructed with a 16 gauge solid galvanized steel outer shell, 4 minimum thickness acoustical glass fiber insulation fill, and a 22 gauge perforated galvanized inner shell. The panels and components shall not be susceptible to damage due to extended exposure to vibration, air temperature, UV rays, or humidity with passage of time. The panel system shall be designed to provide sound transmission loss of 23 db at 125 Hz. Incorporate self sealing panel stacking into the design ACOUSTICAL PERFORMANCE A. The chiller enclosure shall provide a reduction in noise level of 10dBA minimum, as compared to the approved chiller without enclosure, as measured at any point 3 feet away from the chiller enclosure in a plane extending from ground level to 14 ft. high. South Windsor, Connecticut

4 2.04 AERODYNAMIC PERFORMANCE A. The acoustical barrier configuration shall include all acoustical louver air intakes and discharges, and condenser fan plenums, necessary to meet the chiller manufacturer s recommended guideline for system pressure loss and acoustical performance specified herein. PART 3 - EXECUTION 3.01 EARTHWORK A. Refer to Division 2 Section "Earthwork" for excavating, trenching, and backfilling 3.02 EXAMINATION A. Examine areas and conditions, with Installer present, for compliance with requirements for a verified survey of property lines and legal boundaries site clearing, earthwork, pavement work, and other conditions affecting performance of the Work. 1. Do not begin installation before final grading is completed unless otherwise permitted by Architect. B. Proceed with installation only after unsatisfactory conditions have been corrected GROUNDING AND BONDING A. Enclosure Grounding: Install at maximum intervals of 100 feet. 1. Gates and Other Openings: Ground on each side of opening. a. Bond metal gates to gate posts. b. Bond across openings, with and without gates, except openings indicated as intentional enclosure discontinuities. Use No. 2 AWG wire and bury it at least 18 inches below finished grade. B. Protection at Crossings of Overhead Electrical Power Lines: Ground enclosure at location of crossing and at a maximum distance of 150 feet on each side of crossing. C. Enclosures Enclosing Electrical Power Distribution Equipment: Ground as required by IEEE C2 unless otherwise indicated. D. Grounding Method: At each grounding location, drive a grounding rod vertically until the top is 6 inches below finished grade. Connect rod to enclosure with No. 6 AWG conductor. Connect conductor to each enclosure component at the grounding location, including the following: 1. Make grounding connections to each barbed wire strand with wire-to-wire connectors designed for this purpose. 2. Make grounding connections to each barbed tape coil with connectors designed for this purpose. E. Bonding Method for Gates: Connect bonding jumper between gate post and gate frame. South Windsor, Connecticut

5 F. Connections: Make connections to minimize possibility of galvanic action or electrolysis. Select connectors, connection hardware, conductors, and connection methods so metals in direct contact will be galvanically compatible. 1. Use electroplated or hot-tin-coated materials to ensure high conductivity and to make contact points closer in order of galvanic series. 2. Make connections with clean, bare metal at points of contact. 3. Make aluminum-to-steel connections with stainless-steel separators and mechanical clamps. 4. Make aluminum-to-galvanized-steel connections with tin-plated copper jumpers and mechanical clamps. 5. Coat and seal connections having dissimilar metals with inert material to prevent future penetration of moisture to contact surfaces. G. Bonding to Lightning Protection System: If enclosure terminates at lightning-protected building or structure, ground the enclosure and bond the enclosure grounding conductor to lightning protection down conductor or lightning protection grounding conductor complying with NFPA FIELD QUALITY CONTROL A. Grounding-Resistance Testing: Engage a qualified testing agency to perform tests and inspections. 1. Grounding-Resistance Tests: Subject completed grounding system to a megger test at each grounding location. Measure grounding resistance no fewer than two full days after last trace of precipitation, without soil having been moistened by any means other than natural drainage or seepage and without chemical treatment or other artificial means of reducing natural grounding resistance. Perform tests by two-point method according to IEEE Excessive Grounding Resistance: If resistance to grounding exceeds specified value, notify Architect promptly. Include recommendations for reducing grounding resistance and a proposal to accomplish recommended work. 3. Report: Prepare test reports certified by a testing agency of grounding resistance at each test location. Include observations of weather and other phenomena that may affect test results ADJUSTING A. Gates: Adjust gates to operate smoothly, easily, and quietly, free of binding, warp, excessive deflection, distortion, nonalignment, misplacement, disruption, or malfunction, throughout entire operational range. Confirm that latches and locks engage accurately and securely without forcing or binding DEMONSTRATION A. Engage a factory-authorized service representative to train Owner's personnel to adjust, operate, and maintain enclosures and gates. South Windsor, Connecticut

6 3.07 AS-BUILT DRAWINGS A. The Contractor shall provide as-built drawings including as-built ties and markups on a monthly basis. As work progresses, all construction activities shall be documented. The record documents shall include: 1. The Contractor shall hire the services of a surveyor licensed in the sate where the work is being performed to determine parameters stated above of completed work and record the results and update the electronic files. As-builts shall include chiller, all above grade improvements, lateral and vertical (elevation) locations of all installed utilities. 2. Document installation with photographs in digital format. 3. Final documents (drawings and electronic files in AutoCAD format, latest edition), shall be submitted to the designated Owner s Representative not later than 30 days after substantial completion of the project. All comments shall be incorporated to the final documents within 14 days after receiving them from the Owner s Representative. The final record set (hard copy and electronic files) shall be submitted to the Owner s Representative. END OF SECTION /05/12 South Windsor, Connecticut