User`s manual

ML180-MLT350 Dehumidifiers
190TGB-1034-A 2 Installation 13
2.10 Installation Examples
2.10.1 Closed System
Figure 2-6. Closed Airflow System
2.10.2 Open System
Figure 2-7. Open Airflow System
ML
Munters
420
ML
Munters
420
The closed airflow system is mainly used where the room to
be dehumidified contains little or no ventilation, and is
partially sealed.
A closed airflow system offers the advantage of simple
design and therefore low installation costs. Usually a closed
system will minimise the size of the dehumidifier required,
and because the environment is partially sealed, the
operating costs for the dehumidifier will also be minimised.
ML
Munters
420
ML
Munters
420
Open airflow systems can be utilized in place of closed
systems to overcome the following problem areas:
 High level of dust or corrosive particles in the room.
 Harmful gasses or vapours which must not be
recirculated.
 Problems arranging air recirculation where several
rooms are served by the same dehumidifier. Specially
where recirculated air must not be mixed.
 A pressured environment is desired to prevent
uncontrolled infiltration of humid air, particularly where
low relative humidity is required.
When an open airflow system is installed, all leaks in the
airflow much be controlled within an acceptable tolerance.