User`s manual

M180-MLT350 Dehumidifiers
190TGB-1034-A 6 Product Design Information 25
6 Product Design Information
6.1 Product Description
The ML-Series desiccant dehumidifiers are designed to efficiently
dehumidify in low moisture applications. They are equipped with an
internally sealed rotor unit. The rotor casing is constructed of durable
thermoset plastic and contains isolated sections that provide a precise
balance for dehumidification, reactivation, and heat recovery airflows.
Its rugged formed metal frame and access panels are produced from
corrosion resistant ALUZINK
®
.
The electrical control system conforms to EN 60204 (IEC204)
standards. The electrical components are mounted on busbars and are
constructed of halogen-free plastic. The electrical system is designed
for up to 690V and 60
°C. ML Series dehumidifiers conform to both
harmonised European Standards and to CE marking specifications.
6.2 Principal of operation
The desiccant rotor structure comprises of a large number of narrow
and parallel air channels, processed to a composite material that is
highly effective at attracting and holding water vapour.
The rotor is exposed in sectors to different airflows. The airflow that is
to be dehumidified is called process air and passes through the largest
sector of the rotor. The moisture in the process air is deposited into the
rotor structure and the process air will then leave the rotor as dry air.
While the rotor rotates slowly the incoming process air always meets a
dry rotor structure, thus creating a continuous dehumidification
process.
The airflow that is used to reactivate (dry) the rotor structure is called
reactivation air and is first heated. Passing through the smallest sector
of the rotor, in the opposite direction to the process airflow, the
reactivation air removes the deposited moisture and leaves the rotor as
wet air (warm, moist air).
Figure 6-1. Principal of operation
Wet air
Process air
Reactivation air
Dry air