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

[Carroll W. Jones]

The following Control System Outage has been Confirmed:

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:    08/16/2013 17:00
Description: 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 the Test Lab North Addition (HDIce and surrounding shop areas), the EEL (c
 lean rooms and shop areas), and the Accelerator Chilled Water Loop.  The Central Chiller Plant will remain in this configuration until CUP Chiller refrigerant charge has been adjusted, Chiller 58-CH-1 has been repaired, and Johnson Control System interfacing with Test Lab basement chillers is complete.

Impacts:
1.  Systems cooled by chilled water piping section chilled using CUP Building chiller has no automatic chiller capacity backup...there is only one CUP Building chiller.  There is a backup secondary pump and the chiller and all pumps are monitored and remotely alarmed.  CUP chiller refrigerant charge adjustment may be completed as early as 7/5/13 but should definitely be completed by the end of next week (7/12/13).
2.  Systems cooled by chilled water piping section chilled using Test Lab basement chillers have two operational chillers online and one should be able to hold the load.  There are also a backup secondary pump.  The secondary pump is monitored and remotely alarmed but the chillers are currently not monitored and remotely alarmed.  Chiller 58-CH-1 should be repair sometime during the week of 7/8.  The chillers will be automatically controlled and remotely alarmed once JCI has completed interfacing with the existing chillers an

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