Repair HVAC B1101 Data Center

REMOVE EXISTING: A. An interrupt of B1101 electrical power service will be necessary, as the temporary service “rental” A/C unit must be connected/disconnected at the B1101 utility transformer. B. CHW, HW, and CFW isolation valves are denoted within reference drawings. ELECTRICAL power panels are denoted within reference drawings. Data Center floor drain is denoted within reference drawings. C. A temporary service “rental” A/C unit will be required for B1101 Data Center while CRAC equipment are being replaced, repaired. Coordinate scheduled deliver, install, test, and removal of a temporary “rental” A/C unit (DX cooling, ELEC heating) with Vectrus CM. Temporary A/C unit (approx. 80TON) is to provide supplemental cooling of B1101 Data Center while CHW to each CRAC unit is isolated. D. Temporary A/C Unit shall be operational for a minimum of 24 hours prior to the isolation of CHW and demolition of existing CRAC equipment; and shall remain operational until the time that the new CRAC equipment is installed, tested, and ready for operation. E. Contractor shall coordinate a temporary service “rental” A/C unit start-up and operational test prior to starting any demolition of existing B1101 data center HVAC equipment. F. Contractor is to coordinate with EMCS through Vectrus CM for all controls related actions. An EMCS representative will be present during both disconnect and reconnect of any and all control wiring related to this project. This B1101 uses a METASYS controls management system. Contractor will use Johnson Controls (JCI) to perform all work on this METASYS controls management system. Currently EMCS shares no control information with the existing CRAC units. However, EMCS will monitor the new, updated CRAC units after this work is complete. Disconnecting control cables shall be coordinated with Vectrus EMCS before any work is performed. G. Disconnect 480VAC/3ph/60Hz electric service to isolate existing CRAC units. Relocate, remount existing raised floor area Smoke/Fire detector at CRAC unit # 242. H. Isolate, Drain, then Disconnect CHWS&R piping at each CRAC unit. Isolate, Drain, then Disconnect HW RH piping at each CRAC unit, with exception of Secure Data Center CRAC unit # 246. Isolate, Drain, then Disconnect CFW humidifier piping at each CRAC unit. Disconnect noted Condensate drain piping at each CRAC units with exception of Secure Data Center CRAC unit # 246. I. Contractor is to remove (4) existing CRAC units in B1101 NIPR Data Center. Units 242, 243, 244, and 245. Coordinate scheduled removal of existing CRAC units through Vectrus CM. J. All new CRAC units will be delivered with new floorstands. Only CRAC units 242 and 245 will require their floorstands. Existing CRAC units 243 and 244 are Leibert MDL FH422C (22TON) each. These units will NOT require any existing floorstand modifications prior to the install of the NEW (25TON) CRAC units. Existing CRAC units 242 and 245 are Leibert MDL FH302C (15TON) each. These units have a smaller length footprint than NEW (25TON) CRAC units. The existing floorstands and mounting pedestals of these CRAC units must be removed. New floorstand will be installed, modified at CRAC unit 242. New floorstand will be installed, modified, and extended at CRAC unit 245. K. At previous location of CRAC units 242 and 245 Remove raised-floor panels & pedestals, and remove CRAC unit floorstands. L. At CRAC unit 246, existing Leibert MDL BF068 (3TON) unit, in Secure Data Center . Leibert MFR representative will be needed for upgrade of CRAC unit # 246. Contractor shall remove existing control unit & display. Contractor shall remove existing CHW 3-WAY valve inlet piping. Contractor shall remove existing Fan Motor & Controller. PROVIDE AND INSTALL NEW: M. Procure and install four new LIEBERT model CRAC units. MDL # CW084DC1A1H208H1L0BF (QTY: 4) or an approved equal. • CHW cooled, HW RE-HEAT, both with 2WAY control valves • CFW infrared humidification. • Gravity Condensate drain with internal trap. (no condensate pump) • 24” floorstands • Provide, mount (1) network switch in CRAC unit 242, that will accept 2 sets CAT5 cabling from each CRAC unit for unit-to-unit control. • Provide “unity” interface card for BACNet MSTP protocol for EMCS/BAS control signals wiring. • Mount Moisture Sensor, Route Leak Detection Cable provided with each CRAC unit in raised floor below piping connections. • Smoke detector, HI-Temp sensors, and CHW Flow Switch N. Provide 480VAC/3ph/60Hz ELEC SVCE (FLA 23.6, MOP 30A) with factory provided locking disconnect switch, and 65kA SCCA for new CRAC units. O. Install, Insulate, Identify new CHWS&R piping at each CRAC unit. New balancing valves, drain valves will be required at each CRAC unit. , New isolation valves will be required at CRAC units 242 and 243. Install, Insulate, Identify new HW RH piping at each CRAC unit. New balancing valves, drain valves will be required at each CRAC unit. , New isolation valves will be required at CRAC units 242 and 243. Install, Insulate, Identify new CFW humidifier piping at each CRAC unit. New isolation valves will be required at each CRAC units. Reconnect, Identify existing Condensate drain piping at each CRAC unit. P. At CRAC unit 246, existing Leibert MDL BF068 (3TON) unit, in Secure Data Center RM. Leibert MFR representative will be needed for upgrade of CRAC unit # 246. Contractor shall install new I-COM control unit & display. Contractor shall install new CHW 2-WAY valve inlet piping. Contractor shall install new VFD fan controller and new fan motor. Q. MFR representative, Controls Sub-Contractor, and EMCS shall set local CRAC network control. Provide 2 sets of CAT5 cabling from network switch, to be installed in CRAC unit 242, and routed to each of the other CRAC units. Set CRAC unit 245 as STANDBY. Set CRAC units 242, 243, and 244 to a LEAD/LAG sharing sequence CRAC units shall be set to control RA temp/humidity at 75degF, 50%RH R. Controls Sub-Contractor, EMCS shall provide (5) 24VAC, 120mA, 60Hz power circuits for Moisture Sensors at each CRAC unit in raised floor below piping connections. S. MFR representative, Controls Sub-Contractor, and EMCS shall set BAS/EMCS monitoring. Provide an interface card to connect BACNet MSTP protocols with control signal wiring from CRAC units to METASYS control panel in Mech Rm. EMCS shall monitor the following operation parameters at (5) CRAC units. CRAC unit RA Temp CRAC unit SA Temp CRAC unit RA %RH CRAC unit SA %RH CRAC unit mode LEAD/LAG/STANDBY/OFF CRAC unit status ON/OFF (FAN, Cooling, Reheat, Humidifier, each) EMCS shall monitor the following alarm signals at (5) CRAC units. CRAC unit RA Temp HI & LO CRAC unit RA %RH HI & LO CRAC unit operational alarm OFF, when commanded ON CRAC unit liquid alarm CRAC unit smoke alarm CRAC unit low CHW flow alarm T. Contractor shall provide all materials and labor to install all necessary CHW, HW RH, CFW humidifier, and condensate drain piping work, electrical and control service work, and all other accessories in accordance with this SOW, specifications, and drawings referenced. Strict adherence to equipment specifications and manufacturer recommendations is required. U. Coordinate re-fill, vent, test, balance for re-start of B1101 data center CHW, HW RE-HEAT, CFW piping systems through Vectrus CM: Perform CHW system test upon completion of CRAC units install. Perform HW RE-HEAT system test upon completion of CRAC units install. Perform CFW system system test upon completion of CRAC units install. Provide test reports. V. Contractor must accomplish CRAC units commissioning tests. Manufacturer’s factory authorized representative is required. Perform manufacturer start-up, analysis, and operation tests to prove warranty of new CRAC units. Manufacturer shall provide a start-up & operational test procedure. • New integrated CRAC unit local control sequences must be proved. • CRAC unit Smoke, Heat, and Leak Detectors shut-downs must be proved. • CRAC unit CHW 2-WAY valve control with VFD pumps must be proved. • CRAC unit HW 2-WAY valve control with VFD pumps must be proved. • New EMCS control, monitoring, alarms must be proved. Manufacturer shall provide CRAC unit commissioning test report. Report will be delivered to the Vectrus CM on same date as the commissioning test is performed. W. During start-up testing, contractor shall confirm the CHW flow rate to new CRAC units to verify any issues with higher CRAC unit pressure drop versus capacity of CHW pumps as installed. X. During start-up testing, contractor shall confirm the HW RH water flow rate to new CRAC units to verify any issues with higher CRAC unit pressure drop versus capacity of HW pumps as installed. Y. Training will be provided to Vectrus HVAC personnel (max of 5 persons) after a successful equipment start up with the unit operating under normal conditions. Z. After CRAC unit commissioning is accomplished. Contractor shall coordinate the disconnection and removal of Temporary AC unit.

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Heating, Ventilating, and Air Conditioning (HVAC), Instrumentation and Control for HVAC, HVAC Air Distribution, Central HVAC Equipment.