User Manual

63
AUTOMATIC CONTROL
4 VENTILATION AND AIR CONDITIONING
CONTROL
BT Grund der Energieeinsparung
4.10
Humidity control
The control of the air humidity may include
humidification and / or dehumidification.
Controllers may be applied as "humidity limitation
control" or "constant control".
0
No automatic control
No control loop enables to act on the air
humidity.
The humidity of the central supply air is not
affected.
1
Dewpoint control
Supply air or room air humidity expresses the
Dewpoint temperature and reheat of the supply
air to bring the relative humidity to setpoint.
13
Control to the dewpoint requires additional
energy to ensure the required inlet temperature.
2
Direct humidity control
Supply air or room air humidity; a control loop
enables the supply air or room air humidity at a
given setpoint. The setpoint is either fixed and
predefined by the user or a fluctuating optimal
value at a minimum energy but within min/max
limits of room air condition.
14
Only cooled, humidified, and reheated to the
extent required, resulting in lower energy
consumption.