Control: Water Temperature; Control: Digital Input - Carel pRack pR300T Manual Del Usuario

2.1 Control: water temperature

If control is based on the heat exchanger water outlet temperature, the value THRnO is compared against the
specifi ed set point, applying PI control.
Screen Eeeab07 can be used to set the proportional coeffi cient Kp, expressed as a percentage of demand for
each degree diff erence from the set point, and the value of the integral factor in seconds.
This PI control thus generates a demand output between 0 and 100%.

2.2 Control: digital input

If control is set to be managed via digital input:
The status of the input associated with the function on screen Eeaa02 will determine either 0% or 100%
demand.
The scheduler inside the controller can be used to specify the
activation time bands.
If required, the heat recovery function can also be active in
the closing time bands.
This screen is used to confi gure the scheduler.
The function can be activated based on:
•
the heat exchanger water outlet temperature
•
a digital input
•
an external signal.
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ENG
+030220595 - 1.0 - 27.01.2016