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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Application Guide: C200 Hazardous Location Turbine Assembly Gas Detector The gas detector should be covered during removal of rubber gasket material from the enclosure. Sections of the rubber material have silicon-based RTV compound applied for sealing purposes. Vapors from this compound can damage the sensitive sensor element of the gas detector. CAUTION The gas detector is provided for indication purposes only. Even though the gas detector will trip the system in the event of an alarm, it is not intended as a primary safety device. NOTE The gas detector is an infrared-sensor type, and calibration intervals for type of detector may be as long as one year. However, industrial environments differ. Upon initial installation and commissioning, tests should be performed, weekly then monthly. Test results should be recorded and reviewed to determine a suitable calibration interval. Contact your Capstone Authorized Service Provider for gas detector calibration. In most cases, the gas detector will not need to be bypassed for service. The gas detector can be energized while servicing the system, and will only trip in the event of a gas leakage. Heat Detector The sensor element in the heat detector is a completely sealed probe that does not require calibration. In most cases, the heat detectors will not need to be disconnected for service. If the heat detectors are ever suspected to be the cause of a failure, first check the wires connecting the heat detectors to terminal block TB6-H for damage. If the wires do not have any visible damage, use a DMM and perform a continuity test on each wire. If the wires connecting a heat detector to the terminal block are good, replace the heat detector. Pressure Switch The pressure switch should be checked for calibration annually. Refer to Pressure Switch in Appendix A (page A-5) for more details. When troubleshooting the system, if the pressure switch is suspected to be the cause of the problem, first check the wires connecting the pressure to terminal block TB6-H for damage. If the wires do not have any visible damage, use a DMM and perform a continuity test on each wire. If the wires are good, the terminals on the switch may be jumpered. Before jumpering the pressure switch, make sure that all power is disconnected from the controller and relays associated with the external control circuitry of the turbine assembly. Also, ensure that the turbine is configured as described in Turbine Configuration on page 34. Before loosening the four bolts on the pressure switch housing, locate the bolt that has a retainer. This bolt cannot be removed, and it is meant to keep the pressure switch cover captive. Completely remove the other three bolts and loosen the fourth enough to rotate the cover open. 480047 Rev. B (November 2010) Page 52 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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