Flow Tracking (Ftc) - Trane Symbio 210 Installation, Operation And Maintenance Manual

Flow Tracking (FTC)

Two (2) Symbio 210 controllers work together to provide flow tracking control (refer to the
illustration below). The space temperature controller (STC) Discharge Air Flow is communicated
to the flow tracking controller and is reported as Air Flow Setpoint BAS.
Note: This must be set up on the Tracer SC using either a global reference or TGP2 program. for
The flow tracking controller adds the configured airflow tracking offset (positive or negative) to the
Air Flow Setpoint BAS and controls the airflow to this setpoint (Air Flow Setpoint Active). The flow
tracking controller does not require a space temperature sensor or a discharge air temperature
sensor. If the calculated airflow setpoint is less than 10% of the configured nominal airflow, and the
configured airflow tracking offset is less than zero, the air valve is closed. If the calculated airflow
setpoint is less than 10% of the configured nominal airflow, and the configured airflow tracking
offset is greater than or equal to zero, the air valve is positioned at the configured minimum airflow.
The maximum airflow setpoint is limited by the configured maximum airflow.
Figure 13. Use of two Symbio 210 controllers to provide flow tracking control
Reheat Control in Flow Tracking Control Operation
Reheat is not an option on a flow tracking controller.
Unoccupied Flow Tracking Control
In unoccupied control mode, the controller operates the air valve the same as it does in occupied
control mode. The controller enters this mode from a communicated command or from a local
occupancy sensor.
BAS-SVX084A-EN
more details, refer to the Air Systems for Tracer SC Application Guide (BAS-APG007).
Exhaust
Comm Link
C C C
Exhaust FTC VAV
Calibration, Operation Modes, and Control
A A A
Occupied Space
To Other VAVs
or Main
Control Panel
Supply STC VAV
B B B
Primary Air
From Main
AHU
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