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REPRODUCTION  ROOM
WARNING

Engineering Aid 3 - Beginning Structural engineering guide book
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45.866 Figure 3-61.-Exploded view of the Blu-Ray Model 842 Whiteprinter. The ammonia supply bottle must be placed below the machine so that there will be a short, direct, and unkinked run of the large ammonia discharge tube. Only     the     proper     aqueous     ammonia, as recommended  in  the  operation  manual,  should  be used. Use only fresh ammonia and change it at least once  a  month  for  best  operation.  NEVER  reuse  the discharged ammonia. Room     temperature     is     important.     Blu-Ray manufacturers  recommended  a  room  temperature  of 70°F be maintained. A drop in room temperature will cause  condensation  in  the  chest,  giving  wet  prints and may, if excessive, jam the developer. The Blu-Ray is equipped with an ammonia chest heater, which has an independent heater switch. The heater  is  used  to  activate  the  ammonia  vapor  to improve development when it is necessary. This may be   true   especially   with   long,   continuous   machine operation. The  machine  must  be  kept  dust-free  and  clean. Dust  is  an  abrasive  material  that  can  wear  out  the Teflon gate strips in the developer section, as well as other moving parts. OPERATION.—  A  pilot-lighted  switch  marked POWER on the  instrument  panel  turns  the  Blu-Ray machine on and off. When it turns the machine on, it actuates  the  main  drive  motor  and  the  ammonia pump  motor  and  fan,  and  it  lights  the  fluorescent tubes. A  pilot-lighted  switch  marked  HEATER  on  the instrument panel  manually  turns  the  heater  on  and off. Two   knobs   on   the   instrument   panel   marked SPEED   and   DIRECTION   manually   will   give   a stepless speed range from 0 to 12 ft per min in both directions. To    select    the    desired    speed    of    operation, manually turn the knob marked SPEED to a number that experience has shown to be proper for the type of paper being printed. The  knob  marked  DIRECTION  has  a  forward and   reverse   setting.   Keep   this   knob   at   forward setting  at  all  times.  Use  the  reverse  setting  only when  the  paper  is  jamming  and  must  be  instantly removed. This knob can be snapped from forward  to reverse  while  the  machine  is  running.  The  Blu-Ray may be turned on and off AT ANY TIME. THERE IS NO WARM-UP OR 3-43







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