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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Capstone MicroTurbine C200 Heat Recovery Module (HRM) User’s Manual 5.1. Troubleshooting HRM Fault Incidents If a safety feature is actuated, fault incident code 7006 will be reported by the C200 microturbine via the microturbine display panel. This fault incident will shut down the microturbine and prevent it from operating until the fault is corrected. Refer to the C200 Microturbine User’s Manual (Table 1) for a description of incidents and incident reporting on the C200 microturbine display panel. Refer to the C200 HRM System Wiring Diagram in the C200 HRM Technical Reference (Table 1). The safety features that can initiate a fault incident (incident code 7006) are as follows: • Over-temperature alarm: If the controller detects, via the thermocouple at the header manifold outlet, that the exit water temperature has reached the programmed over- temperature setpoint, it opens the fault circuit. This illuminates ALM 2 on the controller screen and initiates a fault incident at the C200 microturbine. Refer to paragraph 5.2 for troubleshooting aids to determine and correct the cause(s) of the high water temperature. • Temperature switch: As an additional safety feature, the HRM includes an adjustable temperature switch installed in the header manifold outlet. If the temperature switch detects that the exit water temperature has reached its over-temperature setpoint, it opens the fault circuit. This initiates a fault incident at the C200 microturbine. Refer to paragraph 5.2 for troubleshooting aids to determine and correct the cause(s) of the high water temperature. • Power sensing relay: The HRM includes a power sensing relay that will initiate a fault incident at the C200 microturbine if the temperature control circuit loses external input power. Refer to paragraph 5.4 for troubleshooting aids to determine and correct the cause(s) of the power loss. 5.2. Exit Water Temperature Too High Perform the following checks if the HRM exit water temperature is too high: • Verify that the temperature controller is in the automatic mode. If the HRM is in the manual mode, then the controller may not be adjusting the modulating actuator to regulate the level of heat recovery. • Verify that the water is flowing properly. Improper water flow may stem from an issue with the water pump or a blockage in a water line. • Verify that there are sufficient thermal loads. If the modulating actuator is operational, and the water flow is unimpaired, it’s possible that insufficient thermal loads exist to remove the heat from the water prior to the water returning to the HRM. In this case, the temperature of the water at the inlet of the HRM may also be too high. • See Figure 6 and check the dial indicator on the modulating actuator to verify that the position of the exhaust diverter is where it should be for the water temperature. If the water temperature is consistently too high, the modulating actuator may not be functioning properly. For example, the exhaust diverter may be at or near the full recovery position due to a failed modulating actuator. 400021 Rev B (October 2012) Page 23 of 26 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 | Capstone MicroTurbine C200 Heat Recovery Module (HRM) User’s Manual
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