Trane Tracer VV550 Installation, Operation And Maintenance Manual page 35

(hardwired) occupancy binary input. Once in occupied standby mode, the controller uses
the occupied standby cooling and heating setpoints, which typically cover a wider range
than the occupied setpoints. The wider range reduces the demand for heating and
cooling in the space.
When the communicated occupancy mode request is unoccupied, the occupancy binary
input signal (if present) does not affect the controller occupancy mode. When the
communicated occupancy mode request (communicated occupancy override not valid,
communicated occupancy schedule occupied, or communicated occupancy sensor not
valid) is occupied, the controller uses the local occupancy binary input to switch between
the occupied and occupied standby modes.
When the controller is in the occupied standby mode, it uses occupied standby setpoints
and runs in:
•
•
•
Occupied Bypass Mode
Occupied bypass mode is used for timed overrides. For example, if the controller is in
unoccupied mode or occupied standby mode, pressing the zone sensor ON button places
the controller in occupied bypass mode for 120 minutes (default configured occupied
bypass time) or until someone presses the zone sensor CANCEL button.
The controller can be placed in occupied bypass mode by either communicating an
occupancy mode request of bypass mode (communicated occupancy override) to the
controller or by using the zone sensor timed override ON button. The occupied bypass
mode and the occupied mode operate similarly.
When the controller is in the unoccupied mode, pressing the zone sensor ON button
places the controller in the occupied bypass mode for the duration of the configured
occupied bypass time.
When the controller is in the occupied standby mode, pressing the zone sensor ON
button places the controller in the occupied bypass mode for the duration of the
configured occupied bypass time.
When the controller is in the occupied bypass mode, it uses occupied setpoints and runs
in:
•
•
•
CNT-SVX17G-EN
Occupied temperature control;
Ventilation flow control or space temperature control;
Flow tracking control.
Occupied temperature control;
Ventilation flow control or space temperature control;
Flow tracking control.
Sequence of Operations
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