Trane VAV VV550 LonTalk, Installation & Operation Manual

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VAV-SVP01A-EN 47
VAV VV550 Controller Programming and Operation
Ventilation Tab
Note: For more information on this Ventilation Tab and how the VAV VV550 Controller interfaces
with Tracer Summit
™ , see CNT-SVX17*-EN
Ventilation Ratio: The Tracer Summit BAS uses the communicated ventilation ratio limit to tell
the controllers how much outdoor air is in the primary air. However, the air handler may not be able
to provide as much outdoor air as the system requires due, for example, to a low outdoor air
temperature. If the communicated ventilation ratio limit is not sufficient, the controller can raise its
minimum airflow setpoint as long as the space temperature remains under control.
Effective Ventilation Setpoint: The Tracer Summit BAS uses the effective ventilation setpoint
from all the VAV boxes to calculate how much outdoor air (OA) the system needs.
Active Minimum Airflow setpoint: The active minimum airflow setpoint must be less than the
active maximum airflow setpoint. The active minimum airflow setpoint and the active maximum
airflow setpoint are limited to 1.2 times the configured nominal airflow
Minimum Airflow Setpoint Source: The controller selects the active minimum flow setpoint
based on the occupancy mode, the use of reheat, and the control mode.
Figure 35. Ventilation tab