Patent ID: 11946661
Assignee: nan
Field: Thermal processes and apparatus (Mechanical engineering)
Classification: CPC F | IPC F

Claim 3:
4. An HVAC system for use in a building having a plurality of zones, the zones being maintained at one or more temperatures, each zone having at least one terminal unit and at least one air quality sensor, the HVAC system comprising:
an air handling unit comprising a cooling circuit portion for providing a cold air airstream, a cooling element disposed in the cold air airstream, and a cooling circuit ambient air damper for admitting ambient air into the cold air airstream, and a bypass circuit portion for providing a bypass air airstream independent of the cold air airstream and a bypass circuit ambient air damper for admitting ambient air into the bypass air airstream; and
a controller configured to determine a hot ambient air condition, where the temperature of the ambient air is higher than the one or more temperatures maintained in the zones, and to close the cooling circuit ambient air damper, and use the bypass ambient air damper for admitting sufficient ambient air into the bypass air airstream to ensure that the terminal units can provide for variable amounts of air as needed to satisfy the respective air quality sensors, in response to the hot ambient air condition.