.Buildings.Controls.OBC.ASHRAE.G36.FanCoilUnits.Subsequences.SupplyAirTemperature

Information

Block that outputs the supply air temperature setpoint, as well as the control signals for the cooling and heating coils in a fan coil unit system. The implemented sequence is based on ASHRAE Guideline 36, 2021, Part 5.22.4.

The supply air temperature TSupSet is varied from the zone cooling setpoint temperature TZonCooSet to the minimum supply air temperature for cooling TSupSet_min, when the cooling loop signal uCoo varies from the minimum limit uCoo_min to the maximum limit uCoo_max. Similarly, TSupSet is varied from the zone heating setpoint temperature TZonHeaSet to the maximum supply air temperature for heating TSupSet_max, when the heating loop signal uHea varies from the minimum limit uHea_min to the maximum limit uHea_max. The setpoint in deadband mode is equal to the current measured supply air temperature TAirSup. yCooCoi and yHeaCoi are set to zero when the fan proven on signal u1Fan is false.

Revisions

• November 20, 2025, by Karthik Devaprasad:
  Added error scaling factors to PI controllers regulating supply air temperature at temperature setpoint.
• March 17, 2022, by Karthik Devaprasad:
  First implementation.