AIAS RC Techsheet IMO

AIAS Room controller - installation and operation instruction | 11 / 26
At forced ventilation, Y3 will open fully as before, and Y2 will control depending on temperature. However, Y2 will not give any output
unless the controller output is above 52 %.
Heating/heating or cooling via change-over
For models offering fan functionality, 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, RC will function as a regular heating/cooling controller.
In winter mode, RC will function as a heating/heating controller. UO2 will initiate rst 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 %.
As the electrical heater is connected to UO1, and since an electrical heater may become very hot, a fan stop delay has been imple-
mented into the system. The fan stop delay will only be activated in heating mode, and then only if the fan has been running prior
to the stop. When the heat output has been set to 0 %, the fan will continue to run for an additional 120 s, at the same speed it had
prior to stopping.
It is very important to note that Regio does not have any built-in function for monitoring when the fan is running or if the heat battery
is overheating. This function must instead be provided by a supervisory system.