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Control functions
The forced ventilation configuration settings are described in Table 2-23 .
Table 2-23 Forced ventilation configuration settings.
Configuration setting Description
Forced ventilation active This setting is used to select if forced ventilation should be activated when the controller is
in heating or cooling mode, or in both modes. This is useful for providing an additional
amount of fresh air into the room and for decreasing the CO
2
level.
Off: Forced ventilation is not activated (default setting).
In heating mode: Forced ventilation is activated when the controller is in heating mode
and bypass state.
In cooling mode: Forced ventilation is activated when the controller is in cooling mode
and bypass state.
In heating and cooling mode: Forced ventilation is activated both when the controller is
in either heating or cooling mode, and in bypass state.
Forced ventilation active at max output This setting is used to select if forced ventilation should be activated when the output
signal is at its maximum. This is useful for providing a boosted heating or cooling effect
when the heating, cooling, or VAV output signal have reached their maximum.
Off: Forced ventilation is not activated (default setting).
At max heating output: Forced ventilation is activated when the heating output signal is
at its maximum and the controller is in bypass state.
At max cooling/VAV output: Forced ventilation is activated when the cooling or VAV
output signal is at its maximum and the controller is in bypass state.
At max heating and cooling/VAV output: Forced ventilation is activated when the
heating, cooling, or VAV output signal is at its maximum, and the controller is in bypass
state.
Forced ventilation sequence This setting is only applicable for the following controller modes:
✓ C VAV
✓ H C VAV
VAV: The VAV output signal is set to its maximum when the forced ventilation function is
active (default setting).
Cooling and VAV: Both the cooling and VAV output signals are set to their maximum when
the forced ventilation function is active.
Figure 2-37 illustrates the analog VAV output and digital output signal behaviour for the H VAV
controller mode when no maximum or minimum limits are set for the output signals, the controller is in
bypass state, and the following configuration settings are applied:
✓
Forced ventilation active : Off
✓
Forced ventilation active at max output : At max heating output
✓
Forced ventilation sequence : VAV
Regio Eedo manual, Rev. D 41