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Ventilation system

 Open the air handling unit

 Choose between the different methods for selection of supply air temperature setpoint (constant, schedule or graph)

 Choose schedule as control for the supply air temperature

👉  In case constant supply air temperature is selected, this value is used.

👉  In case the supply air temperature is based on a schedule, related data is defined here.

👉  In case the supply air temperature is a function of the outdoor temperature, the function is defined here..

Note: The selected supply temperature setpoint is fed to the heat exchanger as well as to both the heating and cooling coils. To turn off any of these elements, set its effectiveness to 0 (by double-clicking on its symbol and modifying the parameter).

👉  Open the AHU component model objects to modify parameters.

Note: The heat exchanger effectiveness represents the percentage of the maximum possible heat which is transmitted between the two air streams.

Note: The cooling coil will often remove humidity

 Modify the schedule for the operation of the fans (select ‘06-18 weekdays’ from database).

Note: The fan operation schedule controls the operation of the central air handling unit (on/off control). The air volume rate in each zone (when the fan is operating) is determined from the zone.

Note: The default AHU does not include any parameter that needs to be adapted to the building size. It has a very large capacity; other AHUs may need capacity data.

 Close the air handling unit

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