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  1. Filling LN2 on Purifier Dewar
  2. QT System Starting Procedure
  3. Liquefier Cleaning when Dewar contains LHe
  4. Cleaning QT purifier Helium-space
  5. Cleaning QT purifier LN2 space
  6. What to do when cold-heads "blockage" warning appear?
  7. LHe Dewar cleaning procedure


Useful information

  1. The volume of an outside gHe tank: 1600 cubic feet
  2. QT recommendation to keep system minimally pressurized: ~20 psi
  3. Running from 40 psi down to 20 psi would produce about 80 liquid litters and we should be able to do that in about 10 hours
  4. HR3.docx

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