1 Contractor Technical Certification.docx

Contractor Technical Certification Vendor must certify that equipment being quoted meets the capabilities listed below. Furthermore, vendor must provide technical specification data in Tables A for the equipment that will be provided. In order to be considered for award, this must be completed and submitted with the vendor quote, and all other requested documents and/or information.

PURPOSE OF REQUEST: Service rental for one complete Chill Water System consisting of two 30-Ton chiller and one 60-Ton Chiller LOCATION: Norfolk Naval Shipyard (NNSY), Portsmouth, VA 23709

PERIOD OF PERFORMANCE: SEE SCHEDULE FOR PERIOD OF PERFORMANCE

Figure (1) – Line Diagram of Proposed System Note 1: Final system may consist of different quantities of Chillers and Pumps (P) than shown in Figure (1) as long as the requirements above are met.

Note 2: Final system may change the order of components as long as the requirements above are met.

Note 3: Freeze protection is not shown in Figure (1). A freeze protection method shall be included for the system in the event there is no cooling load on the system in accordance with Paragraph 12. System can also be used/energized to create more loading on the system during low shipboard loading situations.

Note 4: Diagram shows standard 90-degree fittings. Wye fittings are in lieu of 90-degree fittings and shall be utilized as much as possible to promote minimal flow losses.

Table A

TECHNICAL CAPABILITIES STATEMENT

General Specification for One complete Chill Water System consisting of two 30-Ton chillers and one 60-Ton Chiller

Only fresh water will be circulated through the cooling system described above and shown in Figure (1).

Chill Water System must consist of at least three chillers. System must be able to support varying capacity from 30 to 120 tons of cooling capacity. System shall consist of two thirty (30) Ton Chillers and one sixty (60) Ton Chiller.

System shall be able to allow isolation of each chiller separately to support varying chill water loads shipboard.

Must be air cooled.

Must have a pumping system, consisting of at least two pumps. System must be able to provide a variable supply ranging from 30 to 350 GPM, this includes events were NOT all chillers are energized and minimal load is on the system. Each pumping apparatus must be capable of maintaining a minimum of 100 feet of head supply pressure, for ALL GPM ranges, at the contractor provided supply manifold. At a minimum, the pumping system shall have a minimum of 100 GPM at 100 feet of head pressure of redundant capacity. The redundant pumps are to be separate and staged nearby. The expansion tank shall supply water directly from the bottom of the tank to the pumps as shown in Figure (1). Additional pumps downstream of the chiller unit(s) may be utilized to raise supply pressure to meet the required 100 feet of head pressure requirement at the contractor supplied supply manifold.

Must have suction and discharge manifolds with a quantity of five (5) 2-1/2” MNPT supply connection and a quantity of five (5) 2-1/2” MNPT discharge connections. All manifold connections shall have isolation globe valves installed. Manifolds shall be metallic in nature and shall be Brass and/or Bronze to minimize corrosion from sea air.

Within the cooling loop there must be a reservoir capable of holding at least 250 gallons of cooling water or as required to support system design. Reservoir is required to account for small leaks and provide adequate thermal mass. Reservoir must be transparent in order to visibly verify the water level within the tank. Within reservoir tank, water shall be drawn from the bottom of the tank and supplied toward the top portion of the tank.

System shall include a bypass line in order to flow water when no services are connected to the contractor supplied supply and discharge manifolds. This bypass line shall include globe valves so the flow can be throttled as required to suit Ship’s demands and to keep the chiller units running under low flow / pressure conditions. The sequencing displayed in Figure (1) is required to be met when system is installed and maintained.

System shall contain a constant ventilation system/component at the highest point of the system to remove air from the system during installation and for events when ambient air gets into the system.

Desired output water temperature range is 45° F - 65° F.

Must be operable on a single 460/480 (V), 400 Amp Breaker (MAXIMUM).

Must be provided with a male 500 mcm Camlock electrical connection.

System must have necessary equipment to prevent freezing recirculating water with no cooling load at 0° F. An electronic heating rod/element shall be installed within the expansion tank to provide a heat load during low loading situations and for freeze protection. Freeze protection equipment shall be installed and operational no later than November 15th and may be removed or deactivated 15th April. Training on how to utilize freeze protection method must be provided during set up/install.

CRITICAL SYSTEM SUPPORT: System must be capable of operating twenty-four (24) Hours a day, seven (7) Days a Week.

Contractor is to provide all equipment from the return manifold to the supply manifold. System shall be a complete unit. If pumps or tanks are separate, vendor will provide all piping/valves/fittings as required to couple pumps to the Chill Water Units. Vendor is to provide Extra fittings and hoses to support installation. Wye fittings shall be utilized as much as possible in place of 90-degree fitting to promote minimal flow loss. If the system requires assembly, the system shall be assembled in such a way that it does not cause tripping hazards by minimizing the lengths of hoses between components. Length of hoses shall be minimized to maximum extent possible when routing system. If hose length is longer than needed, it should be able to be coiled and put somewhere out of the way of normal foot traffic. Hoses shall be routed in a way that does not cause the hose to kink and reduce flowrate. Hoses and mechanical joints shall also be insulated at the time of install with nitrile butadiene rubber (or equivalent) that meet ASTM C543 standard pipe insulation to the maximum extent possible to reduce heat absorption. Insulation shall be able to withstand extreme weather.

Chiller Unit(s) must be capable of operating in an industrial environment where dust, dirt, and sea air are present.

Chiller Unit(s) to be equipped with operational Inlet and Outlet Temperature Gages.

Chiller Unit(s) to be equipped with operational Outlet Pressure Gage.

A flow indicating instrument that takes quantitative measurements shall be installed directly before the supply manifold, as shown in Figure (1).

System is to include operational pressure and temperature gages on the contractor provided supply and discharge manifold.

If chiller system holds 55 gallons or more of fuel or oil or similar fluid, provide an environmental catch tank capable of holding at least 110% of the capacity of the fuel, oil and other fluids required to operate the rental unit.

Evaporator must be capable of delivering a leaving temperature of less than 65° F.

Condenser must be capable of operating in a wide ambient temperature range (0-125° F).

Unit must be affixed with a metal tag designating the supplying company, a POC responsible for repairs and maintenance, and a phone number for the POC who is responsible for repairs and maintenance.

Contractor to adhere to the rigging requirements as outlined in Attachment B for contractor equipment at Norfolk Naval Shipyard.

The gross weight of the unit shall be clearly marked on the outside of the unit as outlined in Attachment B. If the unit is not a complete unit, the gross weight of each component shall be clearly marked on each component.

TECHNICAL CAPABILITY/CONTRACTOR RESPONSIBILITY CERTIFICATION

Vendor hereby certifies that vendor’s service meets or exceeds all specifications and contractor responsibilities stated in this solicitation, in their entirety, with no exceptions. ___________ (initials)

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