Building Automation Systems

The following are a few examples of Athena Engineering, Inc.’s Building Automation System Projects:


Olive View – UCLA Medical Center is a 377-bed county hospital located in the north end of the San Fernando Valley that serves low income and indigent patients, as well as the surrounding community. Athena Engineering, Inc. was hired by Western Allied Mechanical to install the building automation system in the emergency services expansion and acute care unit addition to the main hospital. The Building Automation team installed a variable actuated valve system with zone reheat control.

The project also included isolation room pressurization control using variable frequency control on the air handling units and stacked exhaust fans. This specialized system maintains a negative pressurization environment in order to contain infectious diseases in the isolation room.

Finally, chilled and hot water service tie-ins were from the existing central plant. Inline pumps were added with variable frequency control to maintain pressure and flow for the air handling units and reheats.

Project Photos:

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This project consisted of the construction of a new central plant for the main cooling and heating media of the campus. The project was a design/build with TMAD T&G that utilized thermal storage or ice tanks for cooling.

The chilled water side of the project includes two air-cooled chillers that are primarily used for ice charging in the evenings. The ice tanks or thermal storage serve as the cooling media for chilled water during peak hours. This design saves significant energy, as there is no peak loading or usage of chillers during this time.

The hot water side of the project includes six boilers. Rather then using one boiler at full capacity, the sequence of operations calls for some boilers to run at the same time, but at a lower capacity. This increases the lifespan of the equipment and draws less energy when heating is required.

The central plant utilizes variable speed pumping to deliver the media across campus. The system runs only at the capacity needed to meet demand. Differential pressure is sensed at remote locations on campus to determine the need for flow. The system also uses a complex polling equation at each building’s Air Handling Unit or Variable Air Volume Box to determine demand.

Project Photos:

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San Manuel Indian Bingo and Casino is a 24/7-operated facility. The client required a functional Heating Ventilation and Air Conditioning system controlled through a Building Automation System (BAS) to ensure the comfort of their customers.

The detailed plan we created outlined the commissioning process, including establishing specific responsibilities and lines of communication. The intent of the plan was to work in conjunction with Division 15, University Marelich Mechanical and Infinite Control System.

Athena Engineering, Inc. acted as a third party controls commissioning integrator, going through the necessary checks and balances to verify the installation, function, integration and performance of the installed system. As a third party controls commissioning integrator, our goal was to provide the highest level of functional integrity and assure the reliability of the system.

Project Photos:

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This project involved the new construction of a visual and performing arts high school in Los Angeles. The campus is governed by the Los Angeles Unified School District and consists of nine buildings and a central plant.

Athena Engineering, Inc. was responsible for the installation of an Energy Management System consisting of Variable Air Volume (VAV) Air Handling Units (AHUs) and a full hydronic central plant.

Our team took an innovative approach to address the energy needs and aesthetic considerations of the facilities:

  • Classrooms are controlled by VAV supply and return boxes that track airflow in order to control pressure in the zones.
  • Single zone areas that are not classrooms are controlled by packaged air conditioning units or hydronic fan coil units.
  • The central plant is controlled by chillers and boilers that anticipate building load to determine how much service is needed.
  • The library is controlled by under floor unit terminals designed to heat and cool the space from sidewall vents to maintain the aesthetic architecture of this unique building, which is constructed primarily of glass.

All control components are integrated into a graphical user interface with dynamic real-time graphics and crystallized reports. Trend data is monitored and recorded to efficiently control the building automation system.

Project Photos:

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