This is the first FAMIS task for the TCS chillers. TCSY was just given a marker on its water level last week (and by marker, I mean it's a ruler taped to the side of the water level). We had paper logs for these chillers on the chillers themselves, but they were never checked consistently. Enter FAMIS task. Hopefully, combined logs and consistent checks will give us quicker indicators of leaks and normal/expected water loss rates. So yeah, there is a bit of slop here that we are cleaning up :)

This seems like a large amount of water for TCSY. I have been keeping a close eye on the chillers, and the level for the Y chiller has been stable for the past few weeks. I only put the ruler on that chiller last week, so I can't say at what level it was at previously, but I would guess ~2cm below the max line. Either way, this warranted a leak check.

Jason and I walked the lines and checked on table to look for any hints of a leak and found nothing. Looking back at the chiller, the water level was a touch above max, and I could see that 1.2L could squeeze in there from the previous level. There seems to be no leak, that we could find, but we will continue to watch these chillers closely.

A couple of (maybe not so helpful) observations:

• It seems that there is maybe too much slop in the Chiller Level Check / Refill procedure.
• If it doesn't make sense to track / fill ~100 mL at a time, that should be clearly indicated by tracking 1) the expected water loss per week, and 2) the last time the expected water loss was refilled / reset. The FAMIS task seems like the right place for these items to be tracked / commented, but it probably needs to be done within every instance of the task.
• (procedure document number? I might expect it to be related to T1600431, PSL Chiller Maintenance Documents)

I think tightening up the procedure and sorting out the fill date tracking will help avoid confounding a leak with an accumulation of expected water loss in the future.