Energy must be supplied when liquid is converted
into a gas. This energy is designated as evapora-
tion heat. It does not cause any increase in tem-
perature, but is required to convert a liquid into a
gas. Conversely, energy is released when gas is
liquefied, this is designated as condensation heat.
The amount of energy from evaporation heat and
condensation heat is the same.
For water, this is: 2250 kJ/kg (4.18 kJ = 1kcal)
From this it is evident that the condensation of
water vapour causes a large quantity of energy to
be released. With drying operations, a heat cycle is
created, whereby heat is consumed for evapora-
tion and released for condensation.
Generally speaking, the time required for the
drying process is not only dependent on the
output of the unit, but is determined to a greater
extent by the speed at which the material or
building section loses its moisture.
3.2 Unit description
The units have been designed for universal and
straightforward air dehumidification.
Their compact dimensions allow the unit to be
transported and set up with ease.
The units operate in accordance with the conden-
sation principle and are equipped with a hermeti-
cally sealed refrigerant system, low-noise and low-
maintenance fan, operating hours and energy
counter as well as a connection cable with plug.
Fully-automatic electronic controller, a condensate
container with integrated overflow protection in
addition to connection ports for direct condensate
drainage help to ensure continuous fault-free oper-
ation.
The units conform to the fundamental health and
safety requirements of the appropriate EU stipula-
tions. The units are dependable and offer ease of
operation.
Locations at which units are used
The units are used in all locations, where dry air is
a must and where economic consequential
damage (such as that caused by mould) must be
prevented.
The units may be used for the drying and dehumid-
ification of areas such as:
n
New buildings, industrial buildings
n
Basements, storage rooms
n
Archives, laboratories
n
Weekend homes, caravans
n
Bathrooms, wash rooms and changing rooms
etc.
Operating sequence
Switching on the unit puts the electrical control into
operation. The green "COMP. ON" indicator light
on the control panel illuminates. Due to an auto-
matic pressure equalisation, the units start with a
time delay of around 10 seconds.
The fan extracts the moist room air through the
dust filter, evaporator and the condenser behind.
Heat is removed from the room air on the cold
evaporator. The air is then cooled to below dew
point. The water vapour contained in the room air
is then deposited as condensate or rime on the
evaporator fins.
If the temperature sensor here measures a pre-set
minimum, it activates a timer with a 30 minute
delay. If the evaporator temperature stops
increasing during this period, the cooling cycle
switches to hot gas defrosting after the timer cycle.
The fan remains out of operation during the
defrosting phase.
As soon as the rime (ice) has been defrosted and
the temperature at the probe has increased, the
unit switches back to normal dehumidification
mode.
If the room temperature is sufficiently high, the sur-
face of the fins will not be cold enough for rime for-
mation to occur, rendering defrosting unnecessary.
Therefore, the air dehumidifiers work economically.
The cooled and dehumidified air is re-heated by
the condenser (heat exchanger), and blown back
into the room through the outlet grille. The pro-
cessed, dry, heated air then re-mixes with the room
air.
Continuous circulation of the room air through the
unit gradually reduces the relative humidity (% RH)
in the room to the desired humidity level.
Depending on the room temperature and the
humidity, only 30-40% electrical energy is required,
in accordance with the output of the unit.
REMKO LTE
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