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Control functions
The controller is always in heating mode and outputs a heating signal, Y1, that is configured on the controller
outputs by using the configuration values listed in
Table 2-1 .
Maximum and minimum limits for the output signal can be set, see section 2.2 .
Table 2-1 Controller output configuration values and controller output types.
Output signal Controller output configuration value Controller output type
Y1 Heating Analog
Heating valve, increase
Heating valve, decrease Digital
Digital
Heating valve, thermal (PWM) Digital
Figure 2-2 illustrates the control behaviour for this controller 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: Heating signal increases to respond to the heating demand. At 100% heating demand,
Y1: Heating signal reaches its maximum.
When the room temperature is higher than the heating setpoint and no heating demand exists, Y1: Heating
signal is at its minimum.
Figure 2-2 Control behaviour for the Heating controller mode.
2.1.2 H Heating
This controller mode is suitable for room HVAC systems that use a combination of two heating devices in
sequence, such as radiators or fan coils.
The controller acts as a heating controller and regulates based on the heating setpoint and the current room
temperature.
The controller is always in heating mode and outputs two heating signals, Y1 and Y2, in sequence that are
configured on the controller outputs by using the configuration values listed in table
Table 2-2 .
The Y1 and Y2 signal sequence order is configurable.
Maximum and minimum limits for the output signals can be set, see section 2.2 .
Y1: Heating signal
Output
Max: 100%
Heating
setpoint
Min: 0%
Room temperature
100% 0%
Heating demand
8 Regio Ardo manual, Rev. D