HVAC Systems Renovation UCSD – University Center 965

Project Description

The project entailed two parts. The first part of the project was to conduct Engineering Study of the existing HVAC system for the University Center 965 project. It included Condition Assessment Survey and preparing a report describing findings and recommendations. The second part of the project was to design and prepare the construction documents based on the system the University Authorities selected. Teza Design conducted a thorough field investigation of the existing systems to provide the Design/Build contractor with guidelines and criteria according to unified Facilities Criteria (UFC), American Society of Heating Refrigeration and Air Conditioning Engineers ( ASHRAE), International Plumbing Code (IPC) and International Mechanical Code (IMC). The existing domestic hot water storage tanks are to remain and to be reused. The solar systems are to be connected to the existing domestic hot water storage tanks and new boilers. Primary and secondary pumping system is to be utilized. The secondary main pumps are to be duplex type controlled by VFD responding to new pressure differential controller. The existing boilers, pumps, piping and flues and appurtenances are to be removed and replaced with adequately sized boilers and equipment, capable to carry the load. The hydronic boilers are to have a minimum of 85% efficiency and the plumbing boilers 92% efficiency. Where appropriate tank-less gas-fired water heaters are to be installed. Adequately sized bladder type compression tank with pressure reducing makeup valve, relief valve, make-up cold water pipe and associated backflow preventer on the make-up cold water line were specified. The vent stacks are to be long lasting with double walled stainless steel construction. The project included Direct Digital Control (DDC) system for the flow and temperature control of the boilers. Connect to the MCAS Man DDC network. Connect the boilers, pumps and flow control valves to these control systems for remote monitoring capability. Complete DDC system for each new boiler system include: a new building network controller, new building level network and new system controller.