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14.3.5
Dehumidification with recirculation damper
For the dehumidification by means of the recirculation damper, the absolute humidity of the supply
air and of the exhaust air is compared. In case of a higher supply air humidity (corresponds to the
fresh air humidity in the fresh air mode), it is switched to recirculated mode as a function of the de-
humidification requirement (see chapter 14.2.6 for more information), in order to not increase the
absolute humidity content. In case of an additional air quality control by the recirculation damper,
the air quality has a higher priority.
Setpoint
Min fresh air
Max fresh air
Table 18: Fresh air dehumidification with recirculation damper
14.3.6
Dehumidification with damper / cooling, cooling / damper
In this case the dehumidification is done by increasing the amount of recirculation air and then acti-
vating the cooling battery or exactly the opposite.
14.3.7
Setpoints
The setpoints for humidification and dehumidification are entered separately for economy and com-
fort mode. If no humidifier is selected, then no humidification setpoints can be entered. If dehumidifi-
cation is not possible, then no dehumidification setpoints can be entered. At the same time, a maxi-
mum supply air limit for the return air humidity control can be configured. The current humidification
and dehumidification request is displayed.
Setpoint
Humidification Eco
Humidification Comfort
Dehumidification Comfort
Dehumidification Eco
Max supply
Humidifier
Dehumidification
Table 19: Humidification / dehumidification setpoints
14.4 Air quality setpoints
The air quality is measured by an air quality sensor in the return air and is controlled by the amount
of air or the recirculation damper. Sensor type and control mode are configured at commissioning
and cannot be changed.
74/115
Description
Minimum opening positon for the fresh air damper
Maximum opening position for the fresh air damper 100%
Description
Humidification setpoint for economy mode
Humidification setpoint for comfort mode
Dehumidification setpoint for comfort mode
Dehumidification setpoint for economy mode 70 %
Maximum supply air humidity (limit)
Current power request for humidifier
Current dehumidification request
Default
20%
Default
30 %
40 %
60 %
80 %
0.0 %
0.0 %
V07-19.0
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