Commissioning and running of sPHENIX

["Yip, Kin" <kinyip AT bnl.gov>]

Hello,

 

The broken chiller outside 1008C was actually fixed yesterday Oct. 18).   But we’d like to make use of this chance to allow the HVAC group to look into fixing the spare chiller outside 1008C.    Therefore, from our 8:30 am meeting,  we’ve decided to turn back on the ECW only on Monday and you should wait until Monday to turn on/use  any electronics in your racks.

 

There was a meeting after the initial 8:30 am meeting to discuss problem/solution related to our observation that the water temperature seemed to rise even when none of our racks had any  chassis running at all Monday night.   ( That meeting included Peter H., Rob P., Lee F., John H., Jim M., Joel V. et. al.  and didn’t end until 12 pm ! )   One thing that we’ll do before Monday is that when the temperature is above 85 F, we’ll close out the  solenoid valve so that water won’t flow to the detectors (to cause any leaks etc.).

 

I’ll start my vacation this Friday (Oct. 20) and will be back Nov. 3 (morning).

 

If there is any change and any more news, John Haggerty has agreed to make update in this mailing list.

 

Kin

 

From: Yip, Kin <kinyip AT bnl.gov>
Sent: Monday, October 16, 2023 4:21 PM
To: sphenix-run-l AT lists.bnl.gov
Subject: Re: ECW is down --- please don't turn on electronics in your rack before the end of Wed.

 

Hello,

 

We have made a plan with the HVAC, Bob Mckay (BNL F&O) and others to fix the Chiller in 1008C,

and the plan is to fix it by the end of Wed.

 

We're trying to keep running the ECW pump at a low level while people are fixing the Chiller.   

Please don't run any electronics (as this would add heat load the system) until the end of Wed. 

We'll send another email then.

 

Kin

 

---

From: Yip, Kin
Sent: Monday, October 16, 2023 2:06 PM
To: sphenix-run-l AT lists.bnl.gov <sphenix-run-l AT lists.bnl.gov>
Subject: ECW is down

 

Hello,

 

The chiller outside 1008C has suddenly turned itself off.

So, the ECW water may get warmer which would lead to racks being turned off.

 

Right now, no group seem to be using any racks.  

 

We are in a process  to get the BNL AC units to come to fix the chiller....

 

Kin