Carrier RTU Open v5 Integration Manual page 30

Sequence of Operation
The actual equation that the controller uses to calculate Learning Adaptive Optimal Start is nonlinear. An
approximation of the result is shown below.
NOTE The values in the graph below are Fahrenheit.
To change Learning Adaptive Optimal Start settings:
In the navigation tree, select the equipment that you want to change.
1
Click Properties page > Control Program tab > Configuration > Setpoints.
2
Temperature Compensated Optimal Start is a second start method used for gas or electric heating applications. It
switches from unoccupied to the occupied setpoints at a calculated time prior to occupancy. This minimizes the
operation of the unit's fan. The Optimal Start recovery period may begin as early as 4 hours prior to occupancy.
The time at which the setpoints move is based on the difference between the current space temperature and the
desired setpoint, multiplied by the "K" factor, or recovery rate, for the required mode of operation.
The following conditions must be true for Temperature Compensated Optimal Start to operate:

On the Properties page > Control Program tab > Configuration > Setpoints > Optimal Start, the default value
is set to 1 and must be set greater than 0 (0.00 disables Optimal Start) and less than or equal to 4.

The system is unoccupied
To change Temperature Compensated Optimal Start settings:
In the navigation tree, select the equipment that you want to change.
1
On the Properties page > Control Program tab > Configuration > Setpoints, click Heat Start K factor or Cool
2
Start K factor. This defines the equipment's recovery rate in minutes / deg.
RTU Open v5
Integration Guide
26
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