TM 55-4920-328-13 WARNING Do   not   energize   the   ENGINE   PRIMER   ON switch (36) at any time that the engine is hot (at or near the engine operating temperature range).  Failure to observe this warning may cause  an  explosion  with  the  possibility  of fire  and  resultant  damage  to  the  generator set, and possible injury to test personnel. CAUTION Do not crank the diesel engine more than 15 seconds  for  any  start.    Allow  a  minimum  of 15    seconds    between    at-    tempted    starts. Failure to observe this precaution may result In   starter   over-   heat   and   will   materially reduce the service life of the battery through excessive drain. (1)  Position the ENGINE START/RUN switch (35) to START   and   alternately   energize   and   de-   energize   the ENGINE  PRIMER  ON  switch  (36).    If  required,  continue priming   the   diesel   engine   after   engine   start   until   the output of the generator set reaches the normal operating voltage and frequency as indicated on the voltmeter (10) and frequency meter (6). (2)          After     engine     start,     position     the     ENGINE START/RUN switch (35) to RUN. k.  For starting the generator set at temperatures below - 250F, refer to TM 55-6115-425- 12. CAUTION Failure   to   adjust   the   primary   voltage   and frequency  output  of  the  generator  set  prior to  energizing  the  MAIN  circuit  breaker  and auxiliary services circuit breakers may cause extreme damage to METS Instrumentation. I.    Verify  the  output  voltage  of  the  generator  set  is  208 volts  on  all  three  phases,  and  is  120  volts  in  the  fourth position   of   the   meter   selector   switch   (8).      Adjust   the VOLTAGE  ADJUST  control  (25)  to  obtain  the  specified voltage.  Verify 60 Hz output frequency, then energize the CIRCUIT  BREAKER  OPEN/CLOSE  switch  (33).    Then energize  the  MAIN  breaker  (8,  figure  2-9).    Energize  the following auxiliary services circuit breakers: FUEL PUMP Circuit Breaker CB2 (4) BEACON/SPARE Circuit Breaker CB4 (3) LUBE PUMP Circuit Breaker CB6 (2) (T55 engine test only) INST POWER Circuit Breaker CB8 (7) AIR CONDITIONER Circuit Breaker CB10 (6) OIL PRE-HEAT Circuit Breaker CB12 (5) (T63 engine test only) TRICKLE CHARGER Circuit Breaker CB13 (9) MOTOR STARTER CONTROL Circuit Breaker CB11 (10) UTIL OUTLETS/LTG Circuit Breaker CB9 (11) FLOOD LIGHT/BLOWER Circuit Breaker CB7 (12) INST POWER SUPPLY Circuit Breaker CB5 (13) OIL PUMP Circuit Breaker CB3 (14) (All en- I gines except T55, T73, and T700) AIR COMPRESSOR Circuit Breaker CB1 (15) m.  Energize the four slide-type switches integral with light assemblies  1A4,  2A4,  3A5,  and  4A3,  to  provide  console illumination.  Leave these switches energized at all times except for maintenance actions. n.  Position the LEFT CONSOLE FAN 2-speed switch (6, figure   1-26)   and   the   RIGHT   CONSOLE   FAN   2-speed switch  (18)  to  HIGH.    (For  low  temperature  operation  of METS, place the switches in LOW.) o.  Energize the INST PWR ON switch (7, figure 1-26). NOTE If  the  switch  lights  fail  to  operate,  troubleshoot the  affected  circuits,  and  check  out  the  under frequency relay (K5, figure 5-2) and over-voltage protection relay (K6), in accordance with chapter 5. p.  Energize the 26v ac, 400 Hz power supply (41, figure 1-25) by placing the on-off switch (40) in ON.  Leave this switch  in  the  energized  position  at  all  times  except  for maintenance actions. q.  Energize the 28v dc utility power supply assembly (48) by  positioning  the  on-off  switch  (45)  to  ON.    Leave  this switch  in  the  energized  position  at  all  times  except  for maintenance actions. Change 2    2-47