Specifications include, but are not limited to: 1. Remove existing chiller No. 2 and replace with new chiller. 2. Modify existing piping, controls & electrical to accommodate installation of new chiller. 3. Alternate #1: remove and replace existing chiller No. 1. ENCLOSURES/CHILLER CONSTRUCTION 1. Units shall be constructed of a steel frame with galvanized steel panels and access doors. 2. Chiller panels, base rails and control panels shall be finished with a baked on powder paint. Control panel doors shall have door stays. 3. Mount starters and Terminal Blocks in a UL 1995 rated weatherproof panel provided with full opening access doors. If a circuit breaker is chosen, it should be a lockable, through-the-door type with an operating handle and clearly visible from outside of chiller indicating if power is on or off. 4. The coating or paint system shall withstand 500 hours in a salt-spray fog test in accordance with ASTM B117. CHILLER MOUNTED STARTER 1. Single point power connection. 2. The starter shall be reduced inrush, wye-delta starter factory-mounted and fully pre-wired to the compressor motor(s) and control panel. 3. A control power transformer shall be factory-installed and factory-wired to provide unit control power. REFRIGERANT CIRCUIT 1. All chillers shall have 2 refrigeration circuits, each with one or two (manifolded) compressors on each circuit. 2. Provide for refrigerant circuit: a. Liquid line shutoff valve b. Discharge service valve c. Filter with replaceable core d. Liquid line sight glass. e. Electronic expansion valve sized for maximum operating pressure f. Charging valve 3. Full operating charge of R134A and oil. ONTROLS 1. Factory-mounted to the control panel door, the operator interface has an LCD touch-screen display 2. Display shall consist of a menu driven interface with easy touch screen navigation to organized sub-system reports for compressor, evaporator, and motor information as well as associated diagnostics. 3. The chiller control panel shall provide password protection of all set-points 4. Chilled water temperature control shall be microprocessor-based, proportional and integral controller to show water and refrigerant temperature, refrigerant pressure, and diagnostics. This microprocessor-based controller is to be supplied with each chiller by the chiller manufacturer. 5. The front of the chiller control panel shall display the following in clear language, without the use of codes, look-up tables, or gauges: a. Run time. b. Number of starts. c. Current chiller operating mode. d. Chilled water set point and set point source. e. Electrical current limit set point and set point source. f. Entering and leaving evaporator water temperatures. g. Saturated evaporator and condenser refrigerant temperatures. h. Evaporator and condenser refrigerant pressure. i. Differential oil pressure. j. Phase reversal/unbalance/single phasing and over/under voltage protection. k. Low chilled water temperature protection. l. High and low refrigerant pressure protection. m. Load limit thermostat to limit compressor loading on high return water temperature. n. Condenser fan sequencing to automatically cycle fans in response to load, expansion valve pressure, condenser pressure, and differential pressure to optimize chiller efficiency. o. Display diagnostics. p. Compressors: Status (on/off), %RLA, anti-short cycle timer, and automatic compressor lead-lag. 6. On chiller, mount weatherproof control panel, containing starters, power and control wiring, factory wired with terminal block power connection. Provide primary and secondary fused control power transformer. 7. The chiller controller shall utilize a microprocessor that will automatically take action to prevent chiller shutdown due to abnormal operating conditions associated with evaporator refrigerant temperature, high condensing pressure and motor current overload.