Wright Industries Incorporated

HUSHCORE Louver™ Systems For Air-Cooled Chillers

PART 1 – GENERAL

1.1 WORK INCLUDED A. The work consists of furnishing a HUSHCORE™ LOUVER™ Chiller Noise Reduction System as described in this specification.

1.2 SUBMITTALS A. Product Data: 1. Manufacturer’s original catalog cut sheets and material description for each sub-component incorporated into the system. 2. “Or Equal” approval of the Acoustical Package will be given upon submission and review 10 days prior to bid day.

1.3 QUALITY ASSURANCE A. Single Source Requirements: 1. Provide a HUSHCORE™ LOUVER™ Chiller Noise Reduction System from a single manufacturer. 2. The chiller equipment manufacturer shall furnish the HUSHCORE™ System. 3. The HUSHCORE™ Noise Reduction System shall be installed by the specified product manufacturer.

B. Manufacturer Qualifications: 1. Company specializing in the manufacture of acoustical systems and related accessories with not less than 30 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.

PART 2 – PRODUCT

2.1 MANUFACTURER A. BRD Noise and Vibration Control, Inc., PO Box 127, 112 Fairview Avenue, Wind Gap, PA, 18091, Phone: (610) 863-6300, Fax: (610) 863-4230, E-mail: [email protected], Website: www.HUSHCORE.net.

2.2 MATERIALS A. HUSHCORE™ LOUVER™ Chiller Noise Reduction System: 1) HUSH DUCT™ Acoustical Louvers, Part Number HDAL. Louver selection shall consider acoustical performance to meet 2.3 and pressure loss requirements to minimize impact on operating efficiency. Louvers shall be pre-fabricated, sectional, modular and designed for easy and accurate assembly. The louvers shall be direct bolted to the chiller framing members with flanges. 2) The HUSHCORE™ LOUVER™ “LO” System will have modules attached to the lower only sections of the chiller which are open to the compressor circuits. 3) The HUSHCORE™ LOUVER™ “UL” System will have modules attached to the upper air intake coils and the lower sections. 4) HUSH DUCT™ Acoustical Louvers shall be constructed with all galvanized steel 16-gauge frames and 22- gauge blades. The “J” blade louver design shall be 12” thick.

2.3 ACOUSTICAL PERFORMANCE A. When operating at worst case noise conditions, the chiller with prescribed noise treatments shall not exceed [ ] at a distance of [ ], assuming no contribution from ambient background sources.

HUSHCORE™ Louver™ System For Air-Cooled Chillers – (2-1-16) Page 1 of 2 B. Chiller sound power levels with the HUSHCORE™ LOUVER™ System shall not exceed the following levels in any octave band.

63 125 250 500 1000 2000 4000 8000 dBA [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ] [ ]

C. Acoustical reading shall be supplied by the chiller manufacturer after completed installation. Readings shall be conducted by a qualified acoustical consultant.

HUSHCORE™ Louver™ System For Air-Cooled Chillers – (2-1-16) Page 2 of 2