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Chapter 11
Fan control
Regio Midi manual
No fan stop
Models RC-CF/CFO and CDFO contain an option in which the fan will never stop in operating
modes Bypass, Occupied and Standby but instead continue to run at fan speed 1. This function
uses parameter number 41. The factory setting for this option is 0, meaning that the function
is disabled. This function will only work if the fan is in Auto mode; if the fan is set to manual
mode, the manual setting will instead be applied.
EC fan control
Models RC-C3/C3H/C3O/C3DOC and C3DFOC offer an added function for the control of EC
fans. When this function is active, Y3 will follow Y1 and Y2, respectively. As for …F models
with fan control, it is possible to select whether the fan will run in Heating or Cooling, or in
both Heating and Cooling. This setting is made using the same parameter (P50) as for other
fan models.
The function is activated by setting UO3 to Control of EC fan (P22). It may be activated in
control modes Heating, Heating/Heating, Heating or Cooling via change-over,
Heating/Heating or Cooling via change-over, Heating/Cooling, Cooling/Cooling and Cooling.
The function will add a minimum limit to UO3, so that the fan will have sufficient supply
voltage.
