ROICC, Naval Surface Warfare Center, Code TK, Building 108, Dahlgren, Virginia 22448-5000

Y -- DIRECT DIGITAL CONTROL (DDC) SYSTEM, NAVAL SURFACE WARFARE CENTER, DAHLGREN DIVISION, DAHLGREN, VIRGINIA SOL N62477-93-C-0187 DUE 022197 POC Robert E Dungan, Contracting Officer The Dahlgren Division of NSWC intends to install a Direct Digital Control (DDC) system in building 183 located at the Naval Surface Warfare Center Dahlgren Division, Dahlgren Virginia. Construction documents requirements include: (1). Provide new DDC systems including associated equipment and accessories. Provide each control system complete, and operating. Manufacturer's products, including design, materials, fabrication, assembly, erection, examination, inspection, and testing shall be in accordance with ASME B31.1 and NFPA 70. (2). Provide the DDC systems to maintain stable temperature control and all other conditions indicated on drawings. The end-to-end accuracy of the system, including temperature sensor error, wiring error, A/D conversion, conversion, and display shall be 1 degree F. The existing base wide digital and energy control and monitoring system is Barber Coleman Network 8000, with Host 8000 Dynamic colorgraphic workstation located in Building Number 134 on the base. Provide a new digital control system for this facility which is compatible in all respects to the existing system. Compatibility includes the requirement that the complete DDC system communicate with other controllers on the system's various LANS and the existing Host 8000 work station, to provide all features and functions of the existing systems which include, but are not limited to the cooperative operation of all real time programs including dynamic colorgraphics, terminal mode and upload/download of all field programs in standard system procedures. (3) The system shall control climate and energy management functions for complete operation of an HVAC system through the use of digital controllers. No conventional control devise (pneumatic or electronic) such as receiver-controllers, thermostats, and logic units shall be used. The digital controllers in the system shall be linked in a communication network composed of one or more levels of local area LANS. The controllers shall be installed near the equipment being controlled, and distribute the processing to each standalone DDC panel. The control system shall be built up of stand-alone controllers, with the total number of utilized sensor inputs and control outputs to be 48 or less per controller. Failure of any single module will not cause the loss of more than 48 points. Interested sources proposing to supply equivalent system must meet the following justification: (a) Show that you have installed a minimum of 3 systems that are compatible with a Barber Coleman Network 8000 with Host 8000 Dynamic colorgraphic workstation. (b) The system should have a minimum of 50% American made components. (c) Material and equipment shall be standard products of manufacturer regularly engaged in the manufacturing of such product, using similar materials, design and workmanship. The standard products shall have been in commercial or industrial use for 2 years prior to date this notice is published. The 2 year use shall include applications of similarly sized equipment and materials used under similar circumstances. The 2 year experience must be satisfactorily completed by a product which has been sold on the commercial market though advertisements, manufacturers' catalogs, or brochures. (d) The equipment items shall be supported by a service organization. (e) The Contractor or subcontractor that will perform the work with whom the Contractor has a firm contractual agreement, shall have completed at least three DDC systems installation of the same type and design specified, that have been successfully operated the required sequence of operation for at least one year. (e) The programmer responsible for programming the digital controllers shall have a minimum of 2 years experience programming digital controllers, of the same manufacturer, for HVAC systems. Written qualifications must be submitted within 10 days from the date this notice is published. In the absence of other qualifying sources it is the intent of the Agency to identify Barber Coleman as the name brand product within the construction documents as no other type of equipment will satisfy the agency minimum requirements. (0037)

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