Regin REGIO ARDO, Manual, Page: 14 / 134

Control functions
Table 2-6 Controller output configuration values and controller output types.
Output signal Controller output configuration value Controller output type
Y1 Change-over valve Analog
Change-over valve, increase
Change-over valve, decrease Digital
Digital
Change-over valve, thermal (PWM) Digital
Y2 Heating Analog
Heating valve, increase
Heating valve, decrease Digital
Digital
Heating valve, thermal (PWM) Digital
Figure 2-8 illustrates the control behaviour for this mode when no maximum or minimum limits are set.
The heating demand increases as the room temperature falls. When the room temperature falls below the
heating setpoint,
Y1: Change-over (heating mode) signal increases to respond to the heating demand. At 49%
heating demand, Y1: Change-over (heating mode) signal reaches its maximum. When the room temperature
falls further and the heating demand exceeds 51%, Y2: Heating signal increases while Y1: Change-over
(heating mode) signal stays at its maximum. At 100% heating demand, Y2: Heating signal reaches its
maximum.
When the room temperature is higher than the heating setpoint and no heating demand exists, both Y1:
Change-over (heating mode) signal and Y2: Heating signal are at their minimum.
Figure 2-8 Control behaviour for the H Heating/Cooling (change-over) controller mode when the controller
is in H Heating mode.
H Cooling mode
The controller acts as a heating and cooling controller and regulates based on the heating setpoint, cooling
setpoint, and the current room temperature.
The temperature range between the heating and cooling setpoints is defined as the deadband. The controller
is in heating mode when the room temperature is lower than [heating setpoint plus half the deadband], and
in cooling mode when the room temperature is higher than [cooling setpoint minus half the deadband].
When in cooling mode, the controller outputs a cooling signal, Y1, that is configured on the controller
outputs by using the values listed in
Table 2-3 . The Y1 output signal is associated with the 2-pipe fan coil.
When in heating mode, the controller outputs a heating signal, Y2, that is configured on the controller
outputs by using the values listed in
Table 2-3 . The Y2 output signal is associated with the additional heating
device.
Y2: Heating signal
Output
Max: 100%
Heating
setpoint
Min: 0%
Room temperature
Heating demand
100% 51% 49% 0%
Y1: Change-over valve (heating mode) signal
14 Regio Ardo manual, Rev. D