Dehumidifier ML420-MLT1400
4.5.2 Duct for outdoor air inlet
When bringing ambient air from outdoors into the dehumidifier, the inlet duct opening must be located
sufficiently high above ground level to prevent dust and debris from entering.
The ducting must be designed to prevent rain and snow from being drawn into the dehumidifier. The air
inlet must be located away from possible contaminants such as engine exhaust gases, steam and harmful
vapours.
To prevent the wet (outlet) air from humidifying the reactivation (inlet) air, the air inlet for reactivation must
be located at least 2 m from the wet air outlet.
Attach a wire net with a mesh width of approximately 10 mm in the outer end of the duct to prevent animals
from entering the dehumidifier ducting.
Figure 4.6 Outdoor air inlet design
A. Rectangular ducting
B. Round ducting
C. Wire netting
4.5.3 Duct for wet air outlet
The material for the wet air duct must withstand corrosion and temperatures of up to 100 °C. The wet air
ducting must always be insulated if there is a risk of condensation. The wet air leaving the dehumidifier will
easily cause condensation on the inside of the duct walls due to the high moisture content.
Horizontal ducts must be installed sloping downwards (away from the dehumidifier) to drain away possible
condensation. The duct slope must be at least 2 cm/m. In addition, drainage holes (5 mm) should be made at
low points in the duct to prevent water accumulation.
Attach a wire net with a mesh width of approximately 10 mm in the outer end of the duct to prevent animals
from entering the dehumidifier ducting.
Figure 4.7 Wet air outlet design
A. Horizontal wet air outlet
B. Vertical wet air outlet
C. Wire netting
D. Downward slope
E. Condensate drainage
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Installation
190TGB-1035-H1604