CHAPTER 2 OPERATING INSTRUCTIONS

TM 5-6115-590-12 CHAPTER 2 OPERATING INSTRUCTIONS Section I. Operating Procedures WARNING If equipment fails to operate, refer to trouble- shooting procedures in Chapter 4. 2-1. General This section describes, locates, illustrates and provides sufficient information about the controls and instruments for proper operation of the power plant. 2-2. Gas Turbine Engine Controls and Instruments The purpose of the engine controls and instruments and normal and maximum indications of the instruments are described below The engine controls and instruments are grouped in the lower left corner of the instrument panel (see fig. 2-1). a. Battery Charging Ammeter. (1) Description. Dial pointer gauge, calibrated to indicate -30 to +30 DC amperes in 1 ampere increments. (2) Purpose. To indicate the battery charging current during operation of power plant. (3) Indication. Battery charging current of about + 11 amps after initial engine start, charging current of + 2 to +5 amps after a short period of power plant operation b. Fuel Line Heater Circuit Breaker (1) Description. A press-to-reset circuit breaker button installed in the fuel line heater circuit. (2) Purpose. Provide short circuit and overload protection for a fuel line heater circuit. The circuit breaker opening amperage (10 amps) is marked on the reset button. (Use only with units with winterization kit installed.) c. Fuel Line Heater Indicator Lamp. (1) Description. A filament type press-to-test lamp with a red lens. (2) Purpose. Illuminates to indicate that the fuel is sufficiently warm for engine starting. (Use only with units with winterization kit installed. d. Fuel Heater Switch (1) Description. A three position toggle switch. (2) Purpose. To energize a fuel line heater circuit. (Use only with units with winterization kit installed.) e. Fuel Boost Pump Switch (1) Description. A two position, solenoid-held, on-off toggle switch. (2) Purpose. Energizes the fuel boost pump to deliver fuel to the engine fuel control unit at a constant pressure (15 psig). Will trip to OFF position when master switch is in RUN or START position. f. Exhaust Gas Temperature Indicator. (1) Description. Dial pointer gauge, calibrated to indicate 0° to 1800°F m 100° increments to 900°F, 50° increments from 900°F to 1500°F, and 1000 increments from 1500°F to 1800°F The scale is colored green from 0° to 1225°F and red from 1225°F to 1800°F. (2) Purpose. To indicate exhaust gas temperature in the engine exhaust pipe during operation. (3) Indication. Exhaust gas temperature shall not exceed 1260°0F during engine acceleration or 1225°F during steady- state operation at full load. g. Ready to Load Indicator Lamp. (1) Description. A filament type press-to-test lamp with a green lens. (2) Purpose. Illuminates to indicate that gas turbine engine has accelerated to approximately 95 percent of governed speed and is ready for application of load. h. Emergency Operation Indicator Lamp. (1) Description. A filament type press-to-test lamp with a red lens. (2) Purpose. Illuminates to indicate that the emergency operation switch is on and that the power unit is operating with protective devices bypassed. i. Emergency Operation Switch (1) Description. A two position on-off toggle switch A red lockout guard is installed over the switch to prevent accidental actuation of the switch. (2) Purpose. Used in emergencies to bypass protective devices, except overspeed switch, and permit continued operation. WARNING The emergency operation switch must be in OFF position, with the red lockout guard in the closed (down) position. It should be used only in extreme emergencies when need for continued operation justifies risk incurred in loss of equipment, and possible injury to personnel j. Master Switch. (1) Description. A three position toggle switch, spring- loaded return from the up (START) position to the center (RUN) position (2) Purpose. Energizes the engine power circuit and provides a momentary start circuit until appropriate holding relays are actuated to automatically Change 5 2-1