[Utility Outage] Completed HVAC Outage - 05/02/2014 08:00

[Carroll W. Jones]

The following HVAC Outage has been Completed:

Outage:      Central Chiller System Balancing 
Proposed By: Carroll W. Jones
Start Time:  05/02/2014 08:00
End Time:    05/05/2014 16:00

Description/Impacts:
Update:  Balancing work was not completed Friday.  Work will continue and should be completed Monday.  Areas conditions will the same as Friday since ambient conditions should be about the same.  Areas impacts will also be the same.

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

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To close an outstanding TEDF Subcontract item, the balancing subcontractor needs all the connected chilled water valves fully open except at least 500 GPM of flow not located within the TEDF work area.  The cooling equipment that will have chilled water flow isolated are 12-ERU-1, 90-AHU-1, 90-AHU-3, and 58-AHU-33  which totals approximately 533.8 GPM.

Chilled water differential pressure will be lower than normal in the Test Lab North Addition that could impact operation of the UHV furnace.  

12-ERU-1 conditions Building 12 F-Wing ventilation air.  12-ERU-1 also has a heat recovery wheel that will condition incoming air.  The chilled water coil capacity is typically not required until very hot humid weather.

90-AHU-1 and 90-AHU-2 condition the EEL high bay areas and the Room 108.  On days with similar weather projected for Friday, personnel open the roll-up doors which causes the 90-AHU-1 and 90-AHU-3 to stop cooling or heating.  The units continue to circulate air until the doors are closed.  Areas conditions should be almost as they normally are.

58-AHU-33 conditions the Test Lab North Addition that contains the HDIce area, UHV Furnace Area, and some other shop areas.  58-AHU-39 chilled water valve will be fully open which will add cooling in the HDIce main shop area.  The other North Addition areas will not have active cooling but areas temperatures should not rise much above outdoor ambient conditions (guessing mid-seventies).

Balancing work may end 3 PM or earlier, but the work has been scheduled for until 4 PM.

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

Impacted Areas:
	Bldg 01: North LINAC
	Bldg 02: South LINAC
	Bldg 21: North Extractor Service
	Bldg 38: South Access
	Bldg 39: East Arc Service
	Bldg 40: West Arc Service
	Bldg 45: West Arc Service
	Bldg 49: East Arc Service
	Bldg 50: East Arc Service
	Bldg 53: Injector Service
	Bldg 56: West Arc Service
	Bldg 63: East Arc Service
	Bldg 67: North Access
	Bldg 68: West Arc Service
	Bldg 82: South Extractor Service
	Bldg 12: CEBAF Center
	Bldg 58: Test Lab

For more details, visit the webpage listed below:
https://cc.jlab.org/cgi-bin/infrastructure/Outage/OutageView?ident=3