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When in cooling mode, the controller outputs a cooling signal, Y2, that is configured on the controller
outputs by using the values listed in
Maximum and minimum limits for the output signals can be set, see section
Table 2-3 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
Y2
Cooling
Analog
Cooling valve, increase
Cooling valve, decrease
Digital
Digital
Cooling valve, thermal (PWM)
Digital
Y1 + Y2
6-way valve
Analog
6-way valve, increase
6-way valve, decrease
Digital
Digital
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 in the range between the heating
setpoint and the deadband centre, and no heating demand exists,
Y1: Heating signal
is at its minimum.
The cooling demand increases as the room temperature rises. When the room temperature rises above the
cooling setpoint,
Y2: Cooling signal
increases to respond to the cooling demand. At 100% cooling demand,
Y2: Cooling signal
reaches its maximum. When the room temperature is in the range between the cooling
setpoint and the deadband centre, and no cooling demand exists,
Y2: Cooling signal
is at its minimum.
Figure 2-4 Control behaviour for the H Cooling controller mode.
2.1.4
Cooling
This controller mode is suitable for room HVAC systems that use a fan coil or a chilled beam as cooling
device.
Y1: Heating signal
Y2: Cooling signal
Output
Max: 100%
Heating
setpoint
Cooling
setpoint
Min: 0%
Deadband
Room temperature
100%
100%
0%
0%
Cooling demand
Heating demand
Regio
Eedo
manual, Rev. D
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