Description
The Texas Parks and Wildlife Department (TPWD) is seeking to purchase two five-ton air-cooled chiller packages for Sea Center Texas. The chillers must be capable of cooling marine (seawater) within the range of 23 degrees Celsius to 27 degrees Celsius. Respondents shall provide delivery terms with bid response, and delivery may be a factor in determining best value award.
• The chillers will be used to cool the saltwater aquariums in the Sea Center visitor center.
• The air-cooled chiller package shall be composed of an outdoor five-ton air-cooled condensing unit with a vertical-oriented titanium heat exchanger mounted together on 316 stainless steel stand.
• The chillers shall operate with 460-volt three-phase power 60 Hertz and shall have a seawater-safe flow switch that will prevent unit operation if not engaged.
• All fasteners shall be 316 stainless steel, and power shall connect to the condenser.
• A stepdown transformer shall be mounted in the condenser, and the chillers shall have a single-point plastic National Electric Manufacturers Association (NEMA) 4X control box with a twenty-foot tether allowing remote mounting indoors.
• The control box shall have four indicator light-emitting diode lamps to indicate phase loss, flow switch contact, power, and cycle on.
• The heat exchanger shall be titanium tube with PVC SCH 80 shell construction serving as an evaporator, and shall have inlet and outlet of 2” PVC SCH 80 fittings for seawater.
• The chillers shall handle flow rates of a minimum 30 gallons per minute (GPM) with a maximum 60 GPM and shall be capable of transferring a minimum 58,500 British Thermal Unit/kilowatt from seawater.