Sequence of Operation
RTU Open v3 CARRIER CORPORATION ©2019
Installation and Start-up Guide All rights reserved
49
The following conditions must be true for learning adaptive optimal start to operate:
• On the
page >
tab >
>
>
, the default value
is set to 1 and must be set greater than
(
disables
) and less than or equal to
.
• The system is unoccupied
If the controller does not have a valid outside air temperature, then a constant of 65°F (18.3°C) is used.
This value is not adjustable.
The actual equation that the controller uses to calculate
Learning Adaptive Optimal Start
is nonlinear. An
approximation of the result is shown below.
The values in the graph below are Fahrenheit.
To change
Learning Adaptive Optimal Start
settings:
1 In the navigation tree, select the equipment that you want to change.
2 Click
page
>
tab >
>
.
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
page >
tab >
>
>
, the default value
is set to 1 and must be set greater than
(
disables
) and less than or equal to
.
• The system is unoccupied
To change Temperature Compensated Optimal Start settings:
1 In the navigation tree, select the equipment that you want to change.
2 On the
page >
tab >
>
, click
or
. This defines the equipment’s recovery rate in minutes / deg.
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