Regio Midi manual
Chapter 7
Control modes
37
This function is only valid for models with Y3 output.
For VAV control, several basic flows exist for supply air depending on the current running
mode. Factory settings:
•
Presence (Occupied): 20 %
•
Standby and no presence (Unoccupied): 10 %
•
Off: 0 %
Control mode 9: Heating/Heating or cooling via change-
over
For models offering fan functionality (excluding RC-C3DFOC), a function for control of a
heating battery on UO1 in sequence with change-over on UO2 is available. When this has been
performed, the start sequence of UO1/UO2 is changed along with the limits for fan start.
The change-over function will be used to switch between summer and winter mode. UO2 will
be used as a cooling actuator in summer mode and as a heating actuator in winter mode.
In summer mode, Regio will function as a regular heating/cooling controller.
In winter mode, Regio will function as a heating/heating controller. UO2 will initiate first and
UO1 second. The electrical heating battery connected to UO1 will start only if the ordinary
heat battery on UO2 cannot meet the heating demand. When a heating demand exists, the
output of UO2 is 0…100 % linear to the heating demand 0…48 % and UO1 0…100 % to the
heating demand 52…100 %. When the heating demand is 48…52 % UO2 will always output
100 % and UO1 0 %.