Jeff B., Scott, Tyler, Chandra, Robert. 


   Coffey Refrigeration was on site to check the backup Chrystal chiller, which was not cooling. They found the system was 1lb low on R134A (out of a 1.75lb system). They put enough R134A to clear the bubbles from the sight glass and to get the compressor running. They put dye in the refrigerant system. 

   The plan is to run the chiller until at least next Monday. Coffey will come out on Tuesday to look for dye tags of a leak. Further repairs or service will depend on the results of the dye test. 

   I will ask the day shift operator to check the chiller once a day until Monday and give me a call if the chiller is not running. The front panel should show a temperature of 20c. I will be in for Evening shift starting on Monday and will take over checking the unit then. 

   Per Robert's input, we placed the chiller on rubber dampers to prevent the chiller noise from perturbing the IFO over the weekend.