MECHANICAL Electrical Instrumentation & Control Chemical Engineering Service & Maintenance HVAC(Heating, Ventilation, and Air Conditioning) Packaged Air Conditioning Unit Product Description: For medium-sized cooling capacity requirements, HI AIR KOREA (HAK) Packaged Air Conditioning Unit (PACU) for NPPs offers highly reliable performance backed by experience. The PACU is combined with an air-cooled condenser. The refrigerant circuit includes a stop valve for liquid inlet, a fusible plug, a strainer, a liquid line sight glass, a thermostatic expansion valve, a cooling coil, a compressor and a stop valve for the gas outlet. With its simple and compact in design, the PACU is convenient for control rooms, workshops, and kitchens where local cooling/heating is required apart from the main A/C system. With its high-quality components, HAK PACU provides a complete air conditioning solution with outstanding performance. Specification: • Casing - Single-skinned panels made of 1.6 mm thick carbon steel external wall with 25 mm thick polyurethane insulation - Filter section includes removable panel for filter replacement - Front doors are provided for cooling coil, humidifier and fan maintenance - The louvers at plenum chamber can be removed for maintenance • Base Frame - The base frame is made of carbon steel - Rigid enough to support all components during shipping, lifting and operation - Drain pipe is installed through the skid • Filter - Pre-filter - Thickness: 25 mm - Filter efficiency: 80 % • DX Cooling Coil - Tube material: Copper (KS D5301-C1220T) - Fin material: Aluminum (KS D5101-C3771BE) - Cooling medium: HFC refrigerant (R-407C) • Electric Heating Coil - Heating coil is electric type and installed downstream of the cooling coil - Coil shall meet the applicable requirements of NEC and be provided with over-temperature protection • Steam Humidifier - The humidifier shall be certified in accordance with UL 998(as applicable), a self contained electrically heated type - Stainless steel vaporizing chamber with electric immersion heating elements - Self-contained automatic control system with moisturesensing element indicator/transmitter, controller and switches • Fan - Sirocco type - V-belt-driven - Casing material: Galvanized steel - Impeller material: Painted steel • Motor - Premium efficiency motor - Cast iron casing - IP44 protection - Power supply: 480VAC, 60Hz, 3-phase - Service factor: 1.15 - Enclosure: TEFC type(IC411) - NEMA design letter: B • Control Panel - Casing material: Carbon steel - Power source: 480 VAC, 60 Hz, 3-phase - Control source: 120 VAC, 60 Hz, 1-phase - Indoor: NEMA type 12(Dust-tight type) 048 MECHANICAL
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