Occupied Standby Mode; Occupied Bypass Mode; Occupancy Modes; Occupied Mode - Trane Symbio 210 Installation, Operation And Maintenance Manual

Calibration, Operation Modes, and Control
A flow tracking controller runs the same as when it is occupied. When the controller is in the unoccupied
mode and configured for flow tracking control, it runs the same as it does in occupied mode.

Occupied Standby Mode

Occupied standby mode is used to reduce the heating and cooling demands during the occupied hours
when the space is unoccupied. As an example, it can be activated for a classroom currently not in use.
The controller can be placed in the occupied standby mode when a communicated occupancy mode
request (from a communicated occupancy override, occupancy schedule, or occupancy sensor) is
combined with an occupancy request from the local (hard -wired) 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 is controller by:
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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 setpoints are used
when in occupied bypass mode.
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.

Occupancy Modes

TGP2 programs have four (4) valid occupancy modes:
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Occupied Mode

Occupied mode is the normal (default) operating mode for occupied spaces or daytime operation. When
the controller is in the occupied mode, it uses occupied setpoints and is controlled by:
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Unoccupied Mode

Unoccupied mode, known as night setback, is the normal operating mode for unoccupied spaces or
nighttime operation. Unoccupied setpoints enable or disable occupied space temperature control.
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Occupied temperature control
Ventilation flow control
Flow tracking control
Occupied mode
Unoccupied mode
Occupied standby mode
Occupied bypass mode
Occupied space temperature control
Ventilation flow control (constant volume with discharge air temperature control)
Flow tracking control (has no occupancy)
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