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DH dehumidifiers have been designed for use in places which have
to be dried quickly or where an uncontrolled rise in levels of relative
humidity cannot be permitted.
DH dehumidifiers reduce the relative water vapour condensation
level in the air.
As you can see in figure 1, each unit has a refrigeration circuit and
a fan.The air which is drawn in by the fan (3) passes through the fil-
ter (5) and strikes the cold walls of the evaporator (6) where it cools
to a temperature which is slightly below condensation point. Some
of the vapour condenses and is collected in the water tank (9).Then
the air passes through the condenser (4) and is heated to a tem-
perature which is slightly higher than room temperature.
Fig. 1 How the unit works:1. Air-tight compressor. 2. Control
device 3. Helical fan 4. Condenser 5. Air filter 6. Evaporator 7.Tube
fitting 8. Float 9. Water tank (Except DH 80).
Best results are obtained at relative humidity levels of between 40%
and 100% and at temperatures that range from 3° to 40°.
A humidistat automatically controls the unit, turning it on and off
when the desired level has been attained.The electronic control
device (2) automatically starts and stops the defrosting process in
accordance with the workings of the unit.In case of overheating due
to malfunction or if the unit has been used in a place where the tem-
perature exceeds the maximum permitted limit of 40°C, the control
device automatically blocks the unit, the fan and compressor stop
and the control lamp (b) lights up.
The dehumidifier should preferably be placed in the middle of the
space where it will operate so that the intake and expulsion of air will
not be hindered. It should be at least 20-30 cm
from any wall. It should not be placed next to sources of heat such
as radiators, stoves or other heat outlets. It should not be placed
near doors or openings.When the dehumidifier is working all doors
and windows must be shut.
If necessary, the water tank can be removed and the water drained
off directly by attaching a rubber tube to the tube fitting (7).
To turn on the unit proceed as follows:
• Turn the hydrostat adjusting knob clockwise to 20%.
• Turn ON the green switch (a) -position “1”. The fan and compres-
sor start and the switch lights up.
• Turn the hydrostat adjusting knob (d) anti-clockwise to the desired
relative humidity level.
Tu rn OFF the green switch (a)-position “0”.
When the water tank is full the unit stops immediately and the pilot
lamp (c) comes on. The tank must be emptied before the unit can
start working again.
DE
SCRIPTION
4
DESCRIPTION
INSTRUCTIONS FOR USE
GB
WARNING: The mains supply to the heater
(230V, monophase, 50 Hz) must be earthed and
have a magneto-thermal switch with differential.
1
2
3
4
5
6
7
8
9
WARNING: If room temperature is lower than
the minimum permitted value (3°C) the dehu-
midifier doesn’t work and the control lamp (b)
flashes.
WARNING: Cloths or coverings of any kind
must not be placed on the dehumidifier when it
is working.
TURNING OFF
WARNING: The dehumidifier must be used,
stocked and, for DH 25, transported in a vertical
position. Should this not be the case, the
machine will not function properly.
WARNING: The dehumidifier is provided with
an automatic security device which starts the
compressor just 1 minute after the switch (a) is
on.
WARNING: If room temperature is lower than
the minimum permitted value (3°C) the dehu-
midifier doesn’t work and the control lamp (b)
flashes.
INSTRUCTIONS FOR USE
TURNING ON
THE WATER TANK (EXCEPT DH 80)