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Capstone Turbine Corporation • 21211 Nordhoff Street • Chatsworth • CA 91311 • USA Technical Reference: Liquid Fuel System Technical Information – Model C30 MicroTurbine Injector Operation There are two different injectors used on liquid fuel systems – one for injector 1 and another for injectors 2 and 3. Each injector delivers fuel from two points of entry – fuel and air. Fuel Fuel Air Injector #1 509093 Injector #2 and #3 513561 Injector operation changes at different power levels (ISO corrected generator power). Below 3.5 kW, the MicroTurbine operates with a single pilot injector. When MicroTurbine power reaches between 3.5 to 7kW, the system transitions from one injector to three-injector engine operation. The injector switch point varies with ambient conditions. Engine Shutdown When the unit is issued a shutdown command, or experiences a severity level 3 (or greater) fault other than a flameout, the unit performs a fuel purge of all injector fuel lines. A fuel purge is required to eliminate the opportunity for coking to occur inside the injectors after the unit is turned off. There may be an over-temperature in the TET due to excess fuel entering the combustor during this time (software masks TET reading for 10 seconds to avoid over-temperature faults). This over-temperature is normal for a shutdown, and will vary depending on the shutdown power level. No purge is performed if the run state was not reached. The engine shutdown sequence is as follows: 1. The fuel pump is turned off. 2. The air-assist solenoid is turned off. 3. The fuel purge valve opens. 4. Injector solenoids cycle to purge fuel. 5. High-pressure air is blown through injector lines to purge remaining fuel. 6. The RFC is turned off. 410017-001 Rev C (February 2004) Page 4 of 12 This information is proprietary to Capstone Turbine Corporation. Neither this document nor the information contained herein shall be copied, disclosed to others, or used for any purposes other than the specific purpose for which this document was delivered. Capstone reserves the right to change or modify without notice, the design, the product specifications, and/or the contents of this document without incurring any obligation either with respect to equipment previously sold or in the process of construction.PDF Image | Technical Reference Liquid Fuel System Technical Information – Model C30 MicroTurbine
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