TM 5-6115-434-12
(2)
Purpose. Energizes the engine power circuit and provides a momentary start circuit until appropriate
holding relays are actuated to automatically complete the starting sequence. The master switch also functions as an
engine stop switch by de-energizing the engine 24v dc control circuit when placed in OFF position.
l.
Generator Control Circuit Breaker (fig. 2-14).
(1)
Description. A press-to-reset circuit breaker installed in the 60 Hz and 400 Hz generator control circuits.
(2)
Purpose. Provide short circuit and overload protection for the generator control circuits. The circuit
breaker opening amperage (15 amps) is marked on the reset button.
m.
Turbine Engine Control Circuit Breaker (fig. 2-14).
(1)
Description. A press-to-reset circuit breaker installed in the engine control circuit.
(2)
Purpose. Provides short circuit and overload protection for the engine control circuit. The circuit breaker
opening amperage (10 amps) is marked on the reset button.
n.
Remote Operation Switch (fig. 2-14).
(1)
Description. A three position toggle switch.
(2)
Purpose. When placed in the OPERATE RESET position, the switch completes a circuit to reset and close
an output contactor to deliver power to a non-operating power unit for operation of the ventilating fans in the non-
operating unit. The switch returns to the center position when released. When placed in the OFF position, the switch
opens the remote output contactor to stop power output to the non-operating unit.
o.
Remote Operation Trip Indicator Lamp (fig. 2-14).
(1)
Description. A filament type press-to-test lamp with a red lens.
(2)
Purpose. Illuminates to indicate that the remote power output contactor has tripped to open and
disconnected the remote load.
p.
Battery Charging Circuit Breaker (fig. 2-14).
(1)
Description. A press-to-reset circuit breaker installed in the battery charging circuit.
(2)
Purpose. Provides short circuit and overload protection for the battery charging circuit. The circuit breaker
opening amperage (5 amps) is marked on the reset button.
q.
Engine Time Totalizing Meter.
(1)
Description. A five-digit time totalizer counter installed on the side of the engine accessory drive gearcase.
(2)
Purpose. Records the total engine operating time.
(3)
Indication. The counter digits indicate the total operating time in hours and tenths of an hour since the last
resetting of the dials. The time totalizing meter is energized and begins recording the operating time when the engine
rpm reaches approximately 95 percent of governed speed and continues until engine shutdown.
r.
Engine Time Totalizing Meter Circuit Breaker.
(1)
Description. A press-to-reset circuit breaker installed in the engine time totalizing meter circuit. Located
directly below the engine time totalizing meter.
(2) Purpose. Provides short circuit and overload protection for the time totalizing meter circuit. The circuit
breaker opening amperage (3 amps) is marked on the reset button.
2-8. Water System Controls
a.
General. The description, purpose, and function of the manually operated controls in the power unit water
system are described below. The water system controls are located on the upper left of the instrument panel (fig. 2-15)
and on the water inlet and outlet connection panel (fig. 2-6).
b.
Hot Water Pump Switch (fig. 2-15).
(1)
Description. A two position ON and OFF circuit breaker toggle switch.
(2)
Purpose. Energizes the hot water pump electrical circuit when placed in the ON position. De-energizes
the pump circuit when placed in the OFF position. Provides short circuit and overload protection for the hot water pump.
Control of the pump is automatic depending upon hot water delivery requirements after the switch is placed in the ON
position.
2-23
