AMT 60E
Operation
Technology
Spare Parts
Edition GB – M02
REMKO – powerful like a bear.
REMKO AMT 60-E - 90-E
Mobile Dehumidifier
3
AMT 60-E
AMT 90-E
Make sure to read these instructions carefully before starting/using the unit!
Our guarantee will become void when the unit supplied by us is used and
installed for inadequate purposes, or maintained incorrectly, etc.,
or if it is changed without our prior consent.
Subject to alterations!
Operating Instructions
Mobile Dehumidifier
REMKO AMT 60-E - AMT 90-E
G
Always keep these operating instructions near or on the unit!
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Contents page
Air Dehumidification 4
Safety Instructions 6
Unit Description 6
Working Range 7
Installation 7
Condensate 7
Starting 8
Discard the Unit 9
Transport Instructions 9
Maintenance and Service 9
Contents page
In Case of Troubles 10
Technical Data 11
Exploded View AMT 60-E 12
Spare Part List AMT 60-E 13
Exploded View AMT 90-E 14
Spare Part List AMT 90-E 15
Wiring Diagram AMT 60-E 16
Wiring Diagram AMT 90-E 17
Maintenance and Service Log 18
4
Air Dehumidification
The processes that take place during air dehumidifica-
tion are based on physical laws. We will try to describe
these in a simplified form to give you a rough idea about
the principle of air dehumidification.
There are two different ways of drying the buildings:
1. By heating and exchanging the air:
The ambient air is heated to absorb humidity and to
be carried off to the outside. However, the total gen-
erated energy is lost with the carried off humid air.
2. By dehumidifying:
The humid air in the closed room is continuously de-
humidified according to the condensation principle.
Dehumidification has a decisive advantage regarding
energy consumption:
Energy is exclusively needed for the existing room vol-
ume. The mechanical heat released during the dehu-
midification process increases the room temperature
slightly.
When used correctly the air dehumidifier consumes
only approx. 25 % of the energy to be supplied accord-
ing to the “heating and ventilation” principle.
As you can see the corrosion speed is insignificant at a
relative air humidity of less than 50 % and at a humidity
rate of less than 40 % it can even be neglected. When
the relative humidity exceeds 60 % corrosion speed in-
creases considerably.
This limit regarding damages caused by humidity is also
applicable to many other materials, such as powdery
substances, packing materials, wood, and electronic
apparatuses.
Relative Air Humidity
Ambient air is a gas mixture and it always contains a
certain rate of water in the form of water vapour.
This percentage of water is indicated in g per kg of dry
air (absolute water content).
1 m³ of air weighs approx. 1.2 kg at 20° C.
Depending on the temperature each kg of air can only
absorb a defined quantity of water vapour. When this
quantity has been absorbed, the air is “saturated” and
has a relative humidity of 100 %.
By relative air humidity we understand the relation be-
tween the percentage of water vapour contained in the
air at the moment concerned and the maximum possi-
ble percentage of the water vapour, based on equal
temperatures.
The capacity of air to absorb water vapour increases
with raising temperatures. This means that the maxi-
mum possible (= absolute) water content is increased
with increasing temperatures.
The Use of REMKO Air Dehumidifiers
◊ No matter how well doors and windows are insu-
lated, wetness and humidity penetrate even through
thick concrete walls.
◊ The water quantities required for binding regarding
the production of concrete, mortar, plaster, etc. need
in some cases 1 or 2 months to diffuse.
◊ And even the humidity that penetrates into the brick-
work after floods and inundations is released very
slowly.
◊ E.g. this is also the case regarding humidity con-
tained in stocked materials.
The humidity that emanates from parts of buildings or
materials (water vapour) is absorbed by the ambient air.
Consequently the humidity content of the air increases
which results in corrosion and in the formation of mil-
dew, decay, flaked off paint coats and other undesired
damage caused by humidity.
E.g. the following diagram shows in an exemplary way
the corrosion speed of metal at different air humidity
rates.
Temp. °C
Water vapour content in g/m³ at an air humidity of
40% 60% 80% 100%
-5 1,3 1,9 2,6 3,3
+10 3,8 5,6 7,5 9,4
+15 5,1 7,7 10,2 12,8
+20 6,9 10,4 13,8 17,3
+25 9,2 13,8 18,4 23,0
+30 12,9 18,2 24,3 30,3
5
Water Vapour Condensation
The maximum possible percentage of water vapour
that can be absorbed becomes higher while the air is
heated, but the obtained percentage of water vapour
remains unchanged, and consequently the relative air
humidity is reduced.
However, when the air is cooled the maximum possi-
ble percentage of water vapour that can be absorbed
is continuously reduced, whereas the water vapour
quantity contained in the air remains unchanged, and
consequently the relative air humidity rises.
When the air is further cooled off the absorption ca-
pacity regarding the maximum possible water vapour
quantity is continuously reduced until it is equal to the
obtained percentage of water vapour. This is the dew
point temperature.
If the air is cooled down below the dew point, the ob-
tained percentage of water vapour will be higher than
the maximum possible water vapour quantity.
Water vapour is deposited.
It condenses, is converted into water and thus is ex-
tracted from the air
Steamed up window panes in winter or
steamed up bottles containing cold drinks
are typical examples of condensation.
The higher the relative air humidity is, the
higher is the dew point temperature, and
consequently it is easier for the tempera-
tures to fall below the dew point.
The generated conden-
sate is collected in the
apparatus and carried
away.
Condensation Heat
The energy transferred from the condenser to the air
consists of:
◊ The heat that was previously extracted in the evapo-
rator.
◊ The electric driving energy.
◊ The condensation heat released by liquefying water
vapour.
When the liquid condition is converted into a gaseous
condition energy must flow back. This energy is called
evaporation heat. It does not cause the temperature to
raise but is used for the conversion from the liquid to
the gaseous state. On the other hand energy is re-
leased when gas is liquefied, and this energy is called
condensation heat.
The energy rate of evaporation and condensation heat
is identical.
For water this is 2250 kJ / kg ( 4,18 kJ = 1kcal )
This shows that a relatively high energy rate is released
through water vapour condensation.
If the humidity to be condensed is not generated by
evaporation within the room, but fed from the outside,
e.g. by aeration, the condensation heat released
thereby contributes to room heating.
When materials or rooms are to be dried the heat en-
ergy flows in a circulation, i.e. it is consumed during
evaporation and released during condensation.
A larger amount of heat energy is generated when fed
air is dehumidified, and this heat energy is expressed in
the form of a rise in temperature.
Generally the time needed for drying does not depend
on the apparatus capacity, but it is determined by the
speed at which the material or the parts of the building
emit the humidity contained in them.
The air current is cooled off on its way through/via the
evaporator until its temperature falls below the dew
point. The water vapour condenses, it is collected in a
condensate trap and carried away.
Material Drying
Building materials/buildings can absorb considerable
quantities of water; e.g. bricks 90-190 l/m³, heavy con-
crete 140-190 l/m³, calcareous sandstone 180-270 l/m³.
Humid materials such as brickwork dries in the following
way:
◊ The contained humidity flows from the
inside of the material to its surface
◊ Evaporation takes place on the sur-
face = water vapour is absorbed by the
ambient air.
◊ The air enriched with water vapour is continuously cir-
culating through the REMKO air dehumidifier. It is de-
humidified and leaves the apparatus in a slightly
heated up state to absorb again water vapour.
◊ By this the humidity contained in the material is con-
tinuously reduced; the material becomes dry.
°C
30
25
20
15
% r.F.
100
90
80
70
60
50
40
30
20
10
+
+
-
condenser evaporator
air-temperature
air-direction
humidity
course
6
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Any work regarding the refrigerating plant and its
electrical equipment is to be carried out exclu-
sively by especially authorized experts!
Safety Instructions
REMKO dehumidifiers will provide you with high utility
and long life thanks to our extensive material, function
and quality controls.
Dangers may arise nevertheless if the unit is used by
persons not familiar with its operation or if the unit is not
used for its intended purpose.
◊ Make sure to install and use the unit only in explo-
sion-proof rooms.
◊ Make sure not to install and use the unit in an atmos-
phere containing fuel, oil, sulphur and salt.
◊ Make sure to install the unit on a solid base and in a
vertical position.
◊ Make sure not to expose the unit to a direct water
jet.
◊ Make sure that the air can be freely sucked in and
blown off.
◊ Make sure that the suction side is always free from
dirt and loose objects.
◊ Never put objects into the unit.
◊ Do not cover the unit during operation.
◊ Make sure not to transport the unit during operation.
◊ Avoid strong vibrations on the unit as soon as there
is condensate in the condensate tank.
◊ Make sure to protect all electric cables outside the
unit from damage (e.g. by animals).
◊ Before installing connection cable extensions make
sure that they are suitable for the connected power,
cable length and the intended purpose.
◊ Make sure to empty the condensate tank before in-
stalling the unit in another place.
◊ Make sure to transport the unit only in a vertical posi-
tion.
◊ Damage on the compressor will be avoid by a wait-
ing period of at least 1 minutes before starting the
unit.
◊ Uses/operations other than that indicated in these
operating instructions are not allowed!
In the case of non-observation, any of our responsi-
bilities and guarantees will become void.
◊ The unit is to be used with the environmentally
friendly, ozone-neutral refrigerant R407C.
◊ The refrigerant/oil mixture in the unit is to be dis-
posed of correctly and in accordance with the legal
or local prescriptions.
Important Tip Regarding Recycling!
Unit Description
These unit have been designed for automatic, universal
and problem-free air dehumidification. Thanks to their
compact dimensions they can be easily transported and
installed.
The unit work according to the condensation principle
and are equipped with a hermetically sealed refrigerat-
ing plant, a silent nearly maintenance-free ventilator as
well as with a connection cable with plug.
For an operation-control exists a green control-lamp
“operation” on the control-panel. The correct time of op-
eration will record by a hour counter.
The fully automatic electronic control, the condensate
container with integrated overflow safety device, as well
as the connecting branch for direct condensation drain-
ing ensure trouble-free continuous operation.
The unit correspond to the fundamental safety and
health requirements of the relevant EC regulations, they
operate safely and are easy to handle.
Function
When the unit is switched on the electronic control and
monitoring starts.
The green control lamp is lit up.
The compressor and fan are switched on time-delayed.
The fan sucks in the ambient air via the air filter, the
evaporator and the condenser placed behind the latter.
Heat is extracted from the ambient air at the cold
evaporator. It cools down below the dew point, and the
water vapour contained in the air is deposited as con-
densate or hair frost on the evaporator lamellas.
When necessary the evaporator is defrosted with hot
gas with temperature control.
The dehumidified cooled down air is reheated at the
condenser (heat exchanger), and then it is blown out
when it has reached a temperature of approx. 3 - 5 de-
grees above the ambient temperature.
The treated dry air is mixed with the ambient air.
Thanks to the continuous circulation of the ambient air
through the unit, the relative air humidity in the place of
installation is continuously reduced until it has reached
the desired value.
water container
condensate trap
ambient air
fan
compressor
dehumidified
ambient air
condenser
evaporator
fig. AMT 60
Schematic display of function
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