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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: C200 Hazardous Location Turbine Assembly The inlet duct assembly can run vertically, with the necessary elbow configurations so that the air intake is facing down. The inlet duct can also run horizontally, with a slope of at least five degrees to prevent water accumulation and must carry water away from the turbine assembly. A standard drip trap may be used in the inlet duct to allow entrained condensation to exit the duct. The duct must be secured with guy wires or attached to a frame to ensure that the installation will withstand the worst weather conditions expected in the area. It is important to provide independent air ducts when installing two or more turbine assemblies. Do not use tee joints to connect air ducts. After the inlet duct installation is completed, perform a pressure test by powering up the blowers before powering the turbine to ensure that the enclosure pressure is at least 0.2 inch (2.5 cm) H2O when the turbine is stopped and operational. Air Outlet (Blower Exhaust) Connection Refer to the O&I drawing (528350-100) for the location and dimensions of the air outlet connection on the C200 hazardous location enclosure. The air outlet is a stainless steel flange fitting located on top of the enclosure. The air outlet ducting must be 16 inches (406 mm) in diameter, and have an equivalent maximum length of 35 feet (10.7 m). This length is an estimation based on a typical 30 foot (9.1 m) straight run plus three 90-degree elbows. The duct is usually constructed of 16-gauge stainless steel spiral pipe, hot-dipped galvanized steel with epoxy coating, or stainless steel. The duct assembly must consist of the necessary straight sections and 90-degree elbows to accommodate the installation layout. In order to comply with Zone 2, IIA and IIB, T1 requirements approval, the air exhaust duct has to end in a non-hazardous (unclassified) area. The air outlet and all piping must be protected from mechanical damage. It is the installer’s responsibility to comply with applicable NFPA 496 and ATEX requirements, as well as all applicable local codes. The outlet duct assembly can run vertically, with the necessary elbow configurations so that the air intake is facing down. The outlet duct can also run horizontally, with a slope of at least five degrees to prevent water accumulation and must carry water away from the turbine assembly. A standard drip trap may be used in the outlet duct to allow entrained condensation to exit the duct. The duct must be secured with guy wires or attached to a frame to ensure that the installation will withstand the worst weather conditions expected in the area. It is important to provide an independent air duct when installing two or more turbine assemblies. Do not use tee joints to connect air ducts. Engine Exhaust Connection Refer to the O&I drawing (528350-100) for the location and dimensions of the engine exhaust connection on the C200 hazardous location enclosure. The engine exhaust outlet is a stainless steel flange fitting located on top of the enclosure. For engine exhaust ducting, stainless steel is highly recommended. The pipe must be 304 mm (12 inch) diameter and needs to be insulated and protected from mechanical damage throughout the classified area. Material for exhaust ducting and insulation must be rated to at least 371 °C (700 °F). The insulation material is required to be non-porous to minimize gas penetration on hot internal surfaces. The exhaust pipe has to end in a non-hazardous (unclassified) area. It is the installer’s responsibility to comply with applicable NFPA 496 and ATEX requirements, as well as all applicable local codes. 480047 Rev. B (November 2010) Page 30 of 82 Capstone reserves the right to change or modify, without notice, the design, specifications, and/or contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Application Guide Capstone Model C200 Hazardous Location Turbine Assembly
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