SOW_Amendment_1_NEC_BLDG_P2441_23APR2019.pdf

STATEMENT OF WORK Amendment 1 (23APR2019) PROJECT NO. P-2441 power work

FORT BRAGG, NORTH CAROLINA

Special Provisions and General Project Information:

*Additions highlighted in Red

1. Project Title: Rectifier & Battery replacement at Buidling P-2441, Fort Bragg, NC.

2. Contractor shall remove and replace existing Lucent GPS4812 DC power plant equipped with (7)-50amp rectifiers. Current load on system is 95 amps @ 54VDC. Existing Batteries: (2)- 24 Cell strings of Deka Unigy II / AVR95-27. The existing rack and DC power cables to the battery loacation shall be utilized to the greated extent.

3. The Contractor shall provide all personnel, equipment, supplies, facilities, transportation, tools, materials, supervision, and other items and non-personal services necessary to perform operations necessary for providing Rectifier & Battery replacement at P-2441, Fort Bragg, NC.

4. The Contractor shall provide and install a new Vertiv NetSure 7100 powerboard, or equivalent equipped with adequate rectifier boards to replace the old (7) – 50amp units . The existing power cabling and pathways shall be utilized to the greatest extent possible. The proposed powerboard must be compatible with the existing hardware. The Contractor shall provide and install (48) new 95 amps @ 54VDC batteries compatable to the powerboards and grouped in 24 batteries stacks. Contractor shall install new temperature sensing units for each battery cell. Existing batteries will be removed and desposed of by the contractor per NEC guidance.

5. The Contractor shall provide a full system test to include: Setting float, HVD, LVD, wiring alarms on Power Board as well as equalization for at least 12 hours, voltage and temperature readings, then 24 hours after successfully charging batteries, new readings are to be taken.. It is not recommended by the manufacturer to perform a load test on newly installed batteries.

6. Clean up after Servicing: The Contractor shall remove all trash, debris, or surplus materials from the work site at during and at the end of each workday and shall leave the work site clean of all debris when work is completed. The Contractor shall clean any acid spills with appropriate solution.

7. Work hours for this project shall be the normal working hours of 0800 to 1700 local time, M-F.

8. Project completion for the Project estimated to be 90 days from receipt of the Notice to Proceed.

9. Inspection: Inspection will be by the Network Enterprise Center (NEC), Fort Bragg, North Carolina. The contractor shall notify the COR no later than two days prior to starting work.

10. Warranties: A warranty on workmanship for one year must be provided. Manufacture warranties on the rectifiers and batteries will transfer to the NEC.