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Chapter 7
Control modes
Regio Midi manual
Factory settings:
•
Presence (Occupied): 20 %
•
Standby and no presence (Unoccupied): 10 %
•
Off: 0 %
A max limitation for cooling is available for Heating/Cooling with VAV-control and forced
supply air function.
The max limitation is configured 0...100 %, where 0 means the damper is entirely closed and
100 that the damper is entirely open. The function is activated by configuring the appropriate
parameter to a value less than 100. The cooling limitation is present in control modes 4, 5 and
8.
Control mode 5: Heating/Cooling with VAV-control
Heating and cooling are controlled in the same way as in the VAV-control above. The damper
cannot be forced like above. There is also a function that opens the supply air damper on
heating demand. This is normally always required if the heater is placed in the supply air duct,
to carry the heat to the room. A maximum limit is set for the opening of the damper on heating
demand. The factory setting is zero, which means that the function to open the damper on
heating demand is not active. The basic flow can also be set separately.
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 %
A max limitation for both cooling and heating is available for Heating/Cooling with VAV-
control.
The max limitation is configured 0...100 %, where 0 means the damper is entirely closed and
100 that the damper is entirely open. The function is activated by configuring the appropriate
parameter to a value less than 100. The cooling limitation is present in control modes 4, 5 and
8. The heating limitation is present in control modes 5 and 8.
Max airflow on
heating demand
(settable)
Output signal
Cooling
Heating
0 %
Temp (°C)
100 %
Basic airflow
(settable)
Heating output
Cooling output
Increasing airflow on
heating demand
SP
heating
SP
cooling
Control mode 6: Cooling
In control mode Cooling, the unit is always a cooling controller and controls according to the
basic cooling setpoint plus the setpoint adjustment.
