Features Of This Dehumidifier - Mitsubishi Electric MJ-E130AL-H Instruction Manual

Features of This Dehumidifier

Room temperature may rise 2–4°C during operation.
The dehumidifier does not have a cooler function. Due to heat produced during operation, the room temperature may
rise 2–4°C. As a result, the unit may blow warm air, but this is not due to a malfunction. (During winter, the air may not
feel warm as the temperature is below body temperature.)
How does the dehumidifier work?
If you pour cold water into a cup, the air around it becomes
cold, causing water droplets to form on the surface of the cup.
The dehumidifier takes advantage of this phenomenon to
remove moisture from the air.
1 The unit draws air from the room, cools it with its cooling
coil, causing the moisture to transform into water droplets.
2 The water droplets fall into the water tank.
3 Dehumidified air is heated by the re-heating coil, and
then blown out.
The humidity of the room is thus reduced by repeating the
above steps.
The unit can operate in a
room temperature range of
5–35°C.
However, if the room temperature exceeds 35°C, the
unit may operate in blower mode or increase the
airflow. This is because the temperature within the unit
rises causing the protection mechanism to operate. In
order to lower the internal temperature of the unit, use
the unit with the swing stopped and louvre vertical.
If the temperature is below 5°C, only the blower is
operational to prevent the extracted water freeze.
The humidity reading on
the unit may differ from a
hygrometer in the same room.
Even in the same room, temperature and humidity levels may
differ from place to place. If the hygrometer and the unit are in
different parts of the room, the humidity levels are prone to differ.
Moreover, humidity levels differ between places that have good
and no airflow.
Use the reading on the unit as an estimate.
<Cause>
1. Inconsistencies
in temperature
and humidity
2. Difference in
location
3. Difference in
hygrometer
precision
Dry (Warm) Air
Cooling Coil
1
Moist Air
Compressor
The amount of dehumidifying
becomes less in winter.
When the temperature and humidity are low, the amount
of water collected is decreased.
In winter, because the temperature is lower than in
summer, the effect of the dehumidifier is greatly reduced
as shown in the graph below.
Although only a little water collects in the tank, this is not
a malfunction.
Summer (humidity)
Value for HIGH when humidity is 80%
25
20
15
10
5
0 5 10
The values shown on the graph were measured at
constant temperature and humidity and do not
reflect values obtained in actual usage conditions. 28
3
Re-heating Coil
Water Tank
2
Winter (dampness)
15 20 25 30
Room temperature (°C)
3