Solicitation from the Department of Energy is requesting a fixed price quote for a modular water chiller. The chiller should have two independent cooling circuits, each providing a minimum of 28 kW cooling capacity at 60 degrees F. The initial purchase is for one module, but the system should be expandable up to at least 200 kW total capacity. The chiller must meet ASHRAE 15 code requirements and be provided with a control system capable of monitoring and generating alarms for abnormal conditions. The preferred power requirements are 480 Volts/3-phase power, 60 Hz. The chiller controller should be capable of interfacing with an external control system using a Modbus TCP/IP interface. Variable speed or digital scroll compressor type and brazed plate heat exchangers are preferred.