User`s manual

ML180-MLT350 Dehumidifiers
12
2 Installation 190TGB-1034-A
Figure 2-4. Outdoor air inlet design
Figure 2-5. Required ductwork
2.9 Precaution for unit using LI desiccant rotor
To prevent the lithium chloride (LI) desiccant rotor becoming
overloaded when the dehumidifier has been switched off, air with a
relative humidity exceeding 80% must not pass through the rotor!
It is recommended to install motorized and air tight shut-off dampers
in the inlet process and reactivation air openings to the dehumidifier.
This is to prevent air with a very high relative humidity from
inadvertently being drawn through the rotor by a chimney effect
created by ancillary equipment.
This is particularly important when the process air is drawn from
outdoors, or the system has been fitted with a pre-cooler. Failure to
observe these precautions could result in a serious loss of performance
and may cause permanent damage to the rotor.
Rectangular Duct
Round Duct
Wire netting, mesh
width about 10mm
Wire netting, mesh
width about 10mm
ML
Munters
420
1
3
5
5
4
C
B
D
A
2
A = Process air inlet
B = Dry air outlet
C = Reactivation air inlet
D = Wet air outlet
1 = Dry air damper
2 = External filter box (option)
3 = Duct transition
4 = Reactivation air damper
5 = Outlet duct (wire netting)