Trane Symbio 700 Application Manual page 42

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Internal and External Space Setpoint Adjustment
Zone sensors with an internal or external setpoint adjustment provide the controller with a local
setpoint (50° F to 85° F or 10° C to 29.4° C). The internal setpoint adjustment is concealed under
the zone sensor cover. To access the setpoint adjustment, remove the zone sensor cover. Some
external setpoints (when present) are displayed on the digital display zone sensor front cover.
When the local setpoint adjustment is used to determine the setpoints, all unit setpoints are
calculated based on the local setpoint value, the configured setpoints, and the active mode of the
controller. The controller determines the effective space setpoint based on the following:
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Heat mode:
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Cool mode:
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When a building automation system or other controller communicates a setpoint to the
controller, the controller ignores the local setpoint input and uses the communicated value. The
exception is when the system is in unoccupied mode and the controller always uses the
unoccupied setpoints. After the controller completes all setpoint calculations, the calculated
occupied setpoint is validated against the following configured space setpoint limits:
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These setpoint limits apply only to the occupied and occupied standby, heating, and cooling
setpoints. They do not apply to the unoccupied heating and cooling setpoints. When the
controller is in the unoccupied mode, it always uses the unoccupied heating and cooling
setpoints. Unit configuration enables or disables the local setpoint. This parameter provides
additional flexibility to allow you to apply communicated, local, or default setpoints without
making physical changes to the unit. Similar to local setpoints, the effective setpoint value for a
communicated setpoint is determined based on the stored default setpoints, configuration
values, and the controller occupancy mode.
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Local setpoint input (SET)
The local setpoint calibration (configured)
Whether or not the local setpoint adjustment can be used or not (configured)
Communicated setpoint input
Default setpoints (configured)
Occupancy mode
Heating or cooling mode (space demand)
Space setpoint high and low limits (configured)
Occupied mode: Space Temperature Setpoint Active = Space Temperature Setpoint
(arbitrated) - Occupied Offset
Occupied standby mode: Space Temperature Setpoint Active = Space Temperature Setpoint
(arbitrated) - Standby Offset
Unoccupied mode: Space Temperature Setpoint Active = Unoccupied Heating Setpoint Cool
mode
Occupied mode: Space Temperature Setpoint Active = Space Temperature Setpoint
(arbitrated) + Occupied Offset
Occupied standby mode: Space Temperature Setpoint Active = Space Temperature Setpoint
(arbitrated) + Standby Offset
Unoccupied mode: Space Temperature Setpoint Active = Unoccupied Cooling setpoint
Heating setpoint high limit
Heating setpoint low limit
Cooling setpoint high limit
Cooling setpoint low limit
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