Specs combined_Part11.pdf

This is a technical specifications document for packaged water chillers and an advanced utility metering system, as part of VA project 549-23-723 for the Grand Prairie Utility Upgrade. The specifications detail requirements for absorption water chillers, rotary-screw and scroll air-cooled water chillers, and associated controls and monitoring equipment.

The document provides detailed technical requirements for an advanced utility metering system that must integrate with the VA's corporate-wide monitoring system. Key components include electrical power meters capable of monitoring voltage, current, power factors and harmonics; water, oil, and gas flow meters; temperature and pressure sensors; and a Site Data Aggregation Device that provides real-time monitoring and data collection. The system must communicate using BACnet protocol over an ISO 8802-3 ethernet backbone and be capable of monitoring electricity, steam, natural gas, water, and other utilities with specified accuracy levels (±0.5% for electricity, ±2% for most other measurements). All meters must interface with the central monitoring system to provide automated 15-minute interval data uploads of consumption and operating parameters.