[Utility Outage] Completed Control System Outage - 07/29/2013 08:00

[Carroll W. Jones]

The following Control System Outage has been Completed:

Outage:      JCI Control System Interface with Test Lab Chillers and Pumps
Proposed By: Carroll W. Jones
Start Time:  07/29/2013 08:00
End Time:    08/28/2013 17:00
Description: Work continues today Wednesday to correct loading of Chillers 1 and 2 after the lead/lag chiller switched yesterday. The chillers did not load properly yesterday resulting in higher than normal chilled water supply temperature. The controls subcontractor will be determining the cause, implemented the correction, and re-testing to verify proper operation.

For additional information or clarification, please contact Carroll Jones at 757-876-1778.

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Work will continue into Tuesday.  The Chiller 58-CH-4 failure sequence did not work properly and must be troubleshot and corrected.  Testing is still limited to impacting est Lab North Addition (HDICE and adjacent area), the EEL Building, and the Accelerator Glycol Loop until all functions are tested successfully. 

Once the majority of sequences are successfully tested with the current cooling loads, the chilled water system will be reconfigured with all loads (adding CEBAF Center F-Wing, TLA, and Test Lab Highbay loads) to complete final testing of the system.

For additional information or clarification, please contact Carroll Jones at 757-876-1778. 

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JCI has completed interfacing with existing Test Lab chillers and pumps.  The controls will be tested in automatic this morning (8-26-13).  The Test Lab basement is currently supporting Test Lab North Addition (HDICE and adjacent area), the EEL Building, and the Accelerator Glycol Loop.  Chillers will be stopped and started.  Cooling loads should not be significantly impacted during testing.  The control system should react as required to maintain site conditions and efforts will be taken to restore systems if the new controls do not respond as desired. 

Once the majority of sequences are successfully tested with the current cooling loads, the chilled water system will be reconfigured with all loads (adding CEBAF Center F-Wing, TLA, and Test Lab Highbay loads) to complete final testing of the system.

For additional information or clarification, please contact me at 757-876-1778.

Sincerely,

Carroll W. Jones

Update - JCI may be working to resolve interface problems with the two York chillers in the basement Thursday 8-8-13.  It will impact operation of one chiller at a time.  The CUP chiller was left in operation today (8-7-13) to support this work without impacting site cooling demands.  Therefore, the site is split into two chilled water loops again until this work is complete or activities are stopped.


As part of the TEDF Construction Project, Johnson Control Incorporated (JCI) is to control the Test Lab Central Chiller Plant.  Preparation for switchover from American Automatrix controls to JCI controls has been underway for several months.  The point has been reached that all chillers are currently manually controlled.   An equipment operational failure has also occurred forcing the chillers and pumps to be configured in a manner to proceed with switchover to the JCI Control System.

Test Lab Chiller Chiller 58-CH-1 failed this afternoon (Wednesday 7/6/13).  CUP Building Chiller was placed in operation to maintain required site cooling capacity.  Chilled water distribution system has been divided to enable operation of two Test Lab basement chillers in addition to the CUP Building chiller.  Operation in this configuration is required since the CUP Building chiller is not large enough to provide enough cooling capacity for the site without being supplemented by Test Lab basement chillers.  The CUP chiller and CUP Building secondary pumps are cooling the CEBAF Center F-Wing (F-Wing Data Center, F113 Conference Room, Tape Storage, and UPS Room), the TLA (cleanrooms, labs, and shop areas), and the renovated area of the Test Lab high bay (old Test Lab high bay area, VTA Control Room, VSA, Test Cave, and CTF Control Room).  Test two operating chillers in the Test Lab basement are cooling 

For more details, visit the webpage listed below:
https://cc.jlab.org/cgi-bin/infrastructure/Outage/OutageView?ident=9