TM 10-6640-215-13 SECTION V.  UNIT MAINTENANCE PROCEDURES 4-10.  INTRODUCTION. This   section   contains   instructions   covering   maintenance   functions   for   unit   level   maintenance   on   the   Petroleum Laboratory.  Personnel required are listed only if the task requires more than one. After   completing   each   maintenance   procedure,   perform   operational   check   to   be   sure   that   equipment   is   properly functioning. Alphabetical Index Maintenance Title                                                          Paragraph A/C Remote Controls .................................................... .............................................................................. 4-26 Air System ............................................................ ...................................................................................... 4-36 Balance System ........................................................ .................................................................................. 4-42 Burnout Furnace ....................................................... .................................................................................. 4-50 Blackout Microswitch ................................................................................................................................... 4-24 Cabinet System ........................................................................................................................................... 4-41 Centrifuge System ......................................................  ................................................................................ 4-46 Curbside Exhaust Damper Motor ................................................................................................................. 4-35 Curbside Stowage Box ................................................... ............................................................................. 4-56 Distillation Test Apparatus ........................................................................................................................... 4-47 ECU Intake Damper/Motor ............................................... ........................................................................... 4-31 Emergency Lights Ballast ............................................................................................................................ 4-17 Emergency Lights Ballast Box ..................................................................................................................... 4-18 Environmental Control Units, 18,000 BTU .................................... ............................................................... 4-28 Explosion Proof Distribution Box (A13) ........................................................................................................ 4-22 Explosion Proof Refrigerator .............................................. ......................................................................... 4-51 Explosive Proof Distribution Box (A3) .......................................................................................................... 4-20 Fume Chamber and Gum Bath Vent Exhaust Door Assembly ...................... ............................................... 4-14 Gas Alarm System ...................................................... ................................................................................ 4-40 Gas Cylinders and Gas Regulator Valves .................................................................................................... 4-53 GFI Indicating Switches ............................................................................................................................... 4-57 Gum Bath/Fume Hood Exhaust Blower Hoses ................................. ........................................................... 4-43 Laboratory Ovens ........................................................................................................................................ 4-49 Light Ballast .......................................................... ...................................................................................... 4-16 Machinery Room Exhaust Damper Motor ..................................... ............................................................... 4-33 Main Power Panel ...................................................... ................................................................................. 4-19 Manometer Air Regulator Valve ........................................... ....................................................................... 4-38 Motor Controllers ......................................................................................................................................... 4-27 Oxygen Stability Unit ................................................................................................................................... 4-48 Power Cable ...........................................................  .................................................................................... 4-15 Power Entry Panel ......................................................  ................................................................................ 4-12 Power Panel No.  2 ...................................................... ............................................................................... 4-21 Propane Locker Vents ................................................... .............................................................................. 4-13 Purge Exhaust Door, Curbside ............................................. ....................................................................... 4-34 Purge Exhaust Door, Machinery Room ........................................................................................................ 4-32 Purge Intake Door Damper Motor.  .............................................................................................................. 4-30 4-20