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Chapter 10
Actuators
Regio Midi manual
2= Heating or Cooling via change-over function
3 = Heating/Cooling
6 = Cooling
7 = Cooling / Cooling
The actuators operate using a hysteresis (FS=2K), as depicted below.
In control mode 1 and 7, the actuators are controlled in sequence.
When in heating mode, the temperature is permitted to fall below the setpoint minus the
hysteresis before opening the actuator. The actuator will then remain open until the
temperature has reached the setpoint. In cooling mode, the opposite will occur.
Actuator exercise
All actuators are exercised. The exercise takes place at set intervals in hours (FS=23 hours
interval). An opening signal is sent to the actuator for as long as the configured run time. Then
a closing signal corresponding to the length of the run time is sent and the exercise is finished.
On units with a display, the exercise can be inactivated by setting parameters 36 and 37 to zero
(0).
