REMKO ETF Eco Series User manual

Operating and
installation instructions
Edition EN - X02 Read the instructions prior to performing any task!
ETF 500 Eco, ETF 600 Eco
REMKO ETF Eco series
Mobile air dehumidifiers

Content
Carefully read this operating manual prior to commissioning/using
the units!
This operating manual is a translation of the German original.
This manual is an integral part of the unit and must always be kept
in the vicinity of the installation location or on the unit itself.
Subject to modifications. No liability accepted for errors or misprints!
Air dehumidification 4-6
Safety notes 6-12
Intended use 13
Customer service and guarantee 13
Environmental protection and recycling 13
Unit description 14
Set-up 15
Commissioning 16-18
Shutdown 18
Unit transport 18
Care and maintenance 19-20
Troubleshooting 20
Electrical wiring diagram 21
Exploded view of ETF 500-600 Eco 22
Spare parts list for ETF 500-600 Eco 23
Maintenance protocol 24
Technical data 25
R290
Refrigerant
3

It is evident that the corrosion
rate below 50% relative humidity
(RH) is low, and below 40% is
negligible.
The corrosion rate increases
significantly above 60% RH. This
threshold for damage as the result
of humidity also applies to other
materials, such as powdery
substances, packaging, wood and
electronic units.
Buildings may be dried in a variety
of ways:
1. By heating and air exchange:
The air in the room is heated
in order for moisture to be
removed and then this air is fed
outside. All of the energy that
is involved is lost together with
the moist air that is released.
2. By air dehumidification:
The moist air that is present
within an enclosed space is
continuously dehumidified
according to the condensation
principle.
The correlations occurring when
air is dehumidified are based on
physical laws.
These are depicted here
in graphical form in order
to provide you with a brief
overview of the principles of air
dehumidification.
The use of
REMKO air dehumidifiers
– Even if windows and doors
are well insulated, water and
moisture are still capable of
penetrating thick concrete walls.
– The water required for setting
in the production of concrete,
mortar and plaster etc. may only
be diffused after 1-2 months.
– Even moisture trapped in the
masonry after high-water or a
flood is released very slowly.
– The same is also true of
moisture contained in stored
materials for example.
The moisture (water vapour)
released from parts of a building
or materials is absorbed by
the surrounding air. As a result,
the moisture content increases,
which ultimately gives rise to
corrosion, mould, rot, peeling
of paint and other unwanted
damage.
By way of example, the diagram
shows the corrosion rate of metal
in different levels of humidity.
Air dehumidification
With regard to energy
consumption, air dehumidification
has one distinct advantage:
Energy expenditure is limited
exclusively to the air volumes
present. The mechanical heat that
is released by the dehumidification
process is fed back into the room.
Under normal use, the
air
dehumidifier
uses approximately
25% of the energy that is
required for the
"heating and
ventilating" principle.
Relative air humidity
Our ambient air is a gaseous
mixture which always contains
a certain volume of water in the
form of water vapour. This volume
of water is specified in g per kg of
dry air (absolute moisture content).
1m3of air weighs approx. 1.2 kg
at 20°C
Depending on the temperature,
each kg of air is only capable of
absorbing a certain volume of
water vapour. Once this capacity
has been reached, the air is
referred to as “saturated” and has
a relative humidity (RH) of 100 %.
Relative humidity is understood
to mean the ratio between
the current quantity of water
vapour in the air and the maximum
possible quantity of water vapour
at the same temperature.
The ability of the air to absorb
water vapour increases as
the temperature rises. I.e.
the maximum possible (absolute)
water content becomes greater
as the temperature rises.
Corrosion rate
Relative humidity %
4
REMKO ETF Eco Series

Building materials and structures
are capable of absorbing
considerable volumes of water,
such as brick 90-190 l/m³, heavy
concrete 140-190 l/m³ and
limestone 180-270 l/m³.
The drying of moist materials
such as masonry is effected as
follows:
■ The moisture
moves from
the inside of
the material
to its surface
■ Evaporation occurs on
the surface = transfer of water
vapour to the ambient air
Temp. Water vapour content in g/m3at humidity of
°C 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
■ The air containing water vapour
is constantly circulated through
the REMKO air dehumidifier.
The air is dehumidified and,
slightly heated, leaves the unit
in order to re-absorb water
vapour
■ In this way, the moisture
contained in the material
is reduced gradually.
The material is dried!
The accumulated condensate is collected
in the unit and drained off from there.
Verdampfer Kondensator
°C
30
25
20
15
% r.F.
100
90
80
70
60
50
40
30
20
10
+
+
-
Lufttemperatur
Luftfeuchte
Verlauf
Luftrichtung
As it flows through or over the evaporator, the air stream is cooled
to dew point. The water vapour condenses, and is collected in a
condensate trap from where it is drained off.
Drying materials
Water vapour
condensation
Because the capacity for
the maximum possible volume of
water vapour increases as the air is
heated, the volume of water
vapour contained remains constant
and so relative humidity falls.
In contrast, because the capacity for
the maximum possible volume of
water vapour decreases as the air is
cooled, the volume of water vapour
contained remains constant and so
relative humidity increases.
If the temperature continues to fall,
the capacity for the maximum
possible volume of water vapour
is reduced so much so that it is
ultimately equal to the volume of
water vapour contained in the air.
This temperature is referred to as
the dew point. If the air is cooled
to below dew point, the volume of
water vapour in the air will become
greater than the maximum possible
volume of water vapour.
At this point, the water vapour
begins to precipitate.
It then condenses to water.
Humidity is then removed from the
air.
Examples of condensation include
steamed-up window panes
in winter, or the moisture on
the outside of a cold drinks bottle.
As the relative humidity of
the air increases, so too does
the dew point, making it easier for
the temperature to fall below it.
Evaporator Capacitor
Air temperature
Air direction
Air humidity
Progression
% RH
5

Condensation heat
The energy transferred to the air
from the condenser consists of:
1. The amount of heat derived
beforehand in the evaporator.
2. The electrical drive energy.
3. The condensation heat released
by liquefying the water vapour.
Energy must be supplied when
liquid is converted into a gas.
This energy is designated as
evaporation heat. It does not cause
any increase in temperature, 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.
If the moisture that it is to be
condensed is not introduced by
evaporation in the room itself,
but from outside, e.g. through
ventilation, the condensation
heat released contributes to
the heating of the room. With
drying operations, a heat cycle
is created, whereby heat is
consumed for evaporation and
released for condensation. When
dehumidifying fed air, a larger
contribution of heat is created,
which manifests itself as a
temperature increase.
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.
Safety notes
General safety notes
■Carefully read the manual before
commissioning the units or their
components for the first time. It
provides useful tips and notes
such as hazard warnings to pre-
vent injury and material damage.
Failure to follow the directions in
this manual can endanger per-
sons, the environment and the
equipment itself or its compo-
nents and will void any claims for
liability.
■Store this manual and the infor-
mation required for the operation
of this system (e.g. refrigerant
datasheet) in the vicinity of the
units.
■This unit may only be installed
and operated as described in this
manual.
■Independent conversion and/or
modification of any kind is strictly
prohibited.
■National regulations in connec-
tion with installation must be
observed.
■Children must not be left unsu-
pervised when close to the unit.
■For safety reasons, people with
mental, physical or other health
limitations must not operate this
unit unattended.
■The unit is not permitted to be
operated with damaged cables.
The unit must be repaired by a
specialist immediately.
■The unit may only be operated
via a power supply with ground-
ing.
■The use of extension cables is not
recommended.
■The air filter must be cleaned
at intervals of no more than 2
weeks.
■The unit is not permitted to be
operated in the vicinity of heat
sources.
■The unit must be transported up-
right. Residue from the conden-
sate must be drained off before
transport.
■Combustible substances and
pressure containers must be kept
at least 50 cm from the unit.
■The unit must not be stored and
operated in rooms with oil, gas or
sulphur.
6
REMKO ETF Eco Series

■The unit must always be switched
off with the on/off switch.
■Do not place anything on the
device in particular heavy or hot
objects.
■Repairs may only be carried out
by authorised and certified spe-
cialist personnel.
■This unit must be disposed of
professionally in accordance with
environmental protection.
■The safety notes in regards to the
room sizes and the flammability
of the refrigerant must not be
removed from the machine.
■The units may only be operated
in well ventilated areas.
■The unit can be used by children
8 years and up and by persons
without physical, mental or other
health limitations if this knowl-
edge has been obtained via the
necessary safety notes..
■Children must never play with the
unit.
■Cleaning the units must not be
carried out by children without
parental/guardian supervision.
The following notes must be
observed in full:
■ The units must not be operated
at an ambient temperature
below 3 °C.
■ The units may not be set
up or operated in explosive
environments.
■ The units must not be installed
or operated in atmospheres
containing oil, sulphur, chlorine,
salt or dust.
■ Never insert foreign objects into
the units.
■ The units may not be exposed to
direct jets of water.
■ An unobstructed air inlet and air
outlet must be guaranteed at all
times.
■ The air-inlet grille must always
be kept free of dirt and loose
objects.
■ The units must not be covered
during operation.
■ The units must be installed
upright and in a stable position.
■ The units must not be
transported while they are
running.
■ All electrical cables on the
outside of the units must be
protected against damage (e.g.
by animals etc.)
.
■
Before each change of location,
the condensate containers must
be emptied
.
■Appropriate hazard prevention
measures must be taken to
prevent risks to people when
performing installation, repair,
maintenance or cleaning work on
the units.
■The units and components
should not be exposed to any
mechanical load, extreme levels
of humidity or direct exposure to
sunlight.
Caution, risk of fire
Additional safety notes when
handling refrigerant R290
■The refrigerant R290 fulfils the
requirements of the European
F-Gas regulation.
■The units contain 0.200 kg
(ETF
500 Eco) or 0,250 kg (ETF 600
Eco)
of refrigerant R290 depend-
ing on the unit type.
■The maximum permitted amount
of refrigerant R290 is 0.3 kg.
■The units must not be burned,
drilled or pierced.
■Only use cleaning agents which
have been approved by the
manufacturer for cleaning.
■The unit must never be operated
in rooms with naked flames (e.g.
gas heaters, open fireplaces, etc.).
■Refrigerant circuit components
must not be deformed.
7

■The contained refrigerant R290 is
colourless and odourless.
■The unit must not be stored or
operated in rooms which have a
room area of 10
m2 (ETF 500 Eco)
or 12 m2 (ETF 600 Eco)
or less.
■The accumulation of refrigerant
due to leakages can lead to a fire
and explosions in rooms which
are too small due to the develop-
ment of heat or ignition sources.
■The units must be stored care-
fully. Mechanical damage must
be avoided.
■Intervention in the refrigeration
circuit may only be done by certi-
fied specialist personnel taking
into account the safety notes of
the manufacturer.
■Maintenance and repairs may
only be carried out by authorised
personnel which have the cor-
responding knowledge in regards
to flammable refrigerant.
Do not use anything other than
the agent recommended by the
manufacturer to speed up a
possible defrosting process or to
clean the units. The unit may only
be operated and stored in rooms
where there are no devices with
potential ignition sources. Do
not go below the minimum room
area of 10 m2 (ETF 500 Eco) or
12 m2 (ETF 600 Eco). Note that
leaking refrigerant is colourless
and odourless.
The unit must not be burned or
pierced!
!WARNING!
Safety instructions for the
operator
The operational safety of the units
and components is only assured
providing they are used as intended
and in a fully assembled state.
■This unit may only be installed
and operated as described in this
manual.
■Independent conversion and/or
modification of any kind is strictly
prohibited.
■Children must not be left unsu-
pervised when close to the unit.
■For safety reasons, people with
mental, physical or other health
limitations must not operate this
unit unattended.
■The unit is not permitted to be
operated with damaged cables.
The unit must be repaired by a
specialist immediately.
■The unit may only be operated
via a power supply with ground-
ing.
■The use of extension cables is not
recommended.
■The air filter must be cleaned
at intervals of no more than 2
weeks.
■The unit is not permitted to be
operated in the vicinity of heat
sources.
■The unit must be transported up-
right. Residue from the conden-
sate must be drained off before
transport.
■Operating the units in rooms with
potential ignition sources (naked
flames, gas or electrical heaters,
fireplaces) is prohibited.
■The unit may only be installed,
operated and stored in rooms
larger than 10
m2 (ETF 500 Eco)
or 12 m2 (ETF 600 Eco)
.
■Protective covers (grilles) over
moving parts must not be
removed from units that are in
operation.
■Do not operate units or compo-
nents with obvious defects or
signs of damage.
■Contact with equipment parts or
components can lead to burns or
injury.
■The units and components must
not be exposed to any mechani-
cal load, extreme levels of humid-
ity or extreme temperatures.
■Never drill through the housing
cover or have the unit come into
contact with fire.
■Rooms in which refrigerant may
escape must be adequately aer-
ated and ventilated. Otherwise
there is danger of suffocation.
■All housing parts and unit open-
ings, e.g. air inlets and outlets,
must be free from foreign objects,
fluids or gases.
■Do not leave the units running
for an extended period unsuper-
vised.
UImproper use can cause serious
damage to the unit.
Read this manual carefully before
commissioning!
8
REMKO ETF Eco Series

Never cover the air inlets and out-
lets.
Do not allow children to play with
the unit.
Do not stand or sit on the unit.
Unplug the power plug before
cleaning the unit.
Do not disassemble housing parts
(consult a specialist company).
Unplug the power plug when not in
use for a long period.
Ensure the voltage is correct
(220-240 V AC, 50 Hz).
Do not operate the unit with defec-
tive cables or sockets.
The unit and in particular the
control panel must not come into
contact with water.
Safety notes for installation,
maintenance and inspection
■ Check the work area
Before starting work on units
with combustible refrigerants,
ensure that any potential igni-
tion sources are removed and
the risk of igniting the refriger-
ants is eliminated. The aforemen-
tioned safety notes for repairing
the units must be observed at all
times. Work may only be car-
ried out by authorised specialist
personnel with knowledge of
handling combustible refriger-
ants!
■ Prepare the work area
Any persons present must be
informed about the repair proc-
ess accordingly and persons not
involved must vacate the work
area. Working in rooms with lim-
ited space is prohibited. Ensure
that sucient space is available
at the workplace. Ensure that the
ambient conditions are suitable
for working with combustible
refrigerants.
■ Identify refrigerant leaks, check
the atmosphere
Refrigerant may unexpectedly
escape when working on the
refrigerant circuit. Ensure that
the atmosphere in the workplace
is not combustible at all times by
using suitable refrigerant detec-
tors. Be sure to ensure that the
refrigerant detector used is suit-
able, approved and calibrated for
use with refrigerant R290.
■ Provide re extinguishers
Provide appropriate re extin-
guishers before starting work.
For this purpose, dry powder or
CO2re extinguishers are suit-
able.
9

■ Remove any potential ignition
sources
Leaking refrigerant in combina-
tion with corresponding ignition
sources can lead to an explo-
sion. All ignition sources must
therefore be kept away from
the working area at all times!
This also includes the smoking
of cigarettes. Inform all persons
present that this includes the
axing of safety notes and the
closing o of the working area.
■ Sucient ventilation
Before starting work, ensure that
the working area is outdoors
or has sucient ventilation. A
continuous ventilation stream
is required while working. The
safety of the persons working
must be guaranteed by the ex-
haust air equipment: potentially
leaking refrigerant must be lead
away safely and drained into the
atmosphere in an optimum man-
ner.
■ Checking the refrigerant circuit
If electronic components need
to be replaced, ensure that
the spare parts have the same
function and identical technical
specications. The maintenance
and replacement regulations of
the manufacturer must always
be observed and complied with.
Please contact the support of the
manufacturer with any problems
or queries. The following safety
checks must be carried out when
using combustible refrigerants:
- The ll level adjusts to the size
of the rooms in which the unit is
located.
- The exhaust air equipment and
its outlets function properly and
are not blocked or obstructed.
■ Checking the electronic compo-
nents
A component and safety check
must be carried out before
repairing and maintaining
electronic components. If safety
cannot be ensured due to a de-
fect on a component, installation
must not take place until safety
can be guaranteed again. If the
defect on the spare part cannot
be remedied and downtime of
the unit is no longer acceptable,
an adequate temporary solution
must be arranged. The owner/
operator of the unit must be in-
formed about this. The detailed
safety check must include the
following aspects:
- Capacitors are discharged. Dis-
charging must be done in a safe
process to prevent ying sparks.
- There must be no electronic
components active or uninsu-
lated wires while lling, repairing
or cleaning.
- There must be no earthing of
the system.
■ Repairs to closed components
Before repairing closed compo-
nents/housing parts, the unit
must be free from voltage. If
carrying out the repairs free from
voltage cannot be avoided, the
critical points of potential refrig-
erant leakages must be checked
using a leak detector.
The following notes must be
observed when working on elec-
tronic components if the hous-
ing is changed in such a way that
its safety is inuenced. This also
relates to cases where the lines
are damaged, there is excessive
or incorrect pin assignment, con-
nections are not assigned in the
original way or similar deviations
to the expected condition are
determined.
■ Repairing of intrinsically safe
components
Do not introduce permanent
inductive or capacitive loads
into the existing circuits without
ensuring that the maximum
permitted voltages and amper-
ages of the assemblies and lines
are not exceeded. Intrinsically
safe components are individual
components that can be operat-
ed in the presence of ammable
substances. The test equipment
must be adjusted according to
the situation-dependent condi-
tions. Only use components
which are ocially approved by
the manufacturer as spare parts.
Unapproved components can
cause a re in the event of a leak-
age in the refrigerant circuit.
10
REMKO ETF Eco Series

■ Wiring
Lines must be checked for the
following damage:
- Damage to the insulation
- Corrosion at the contact points
- Excessive pressure on the lines
- Damage due to vibrations
- Damage due to sharp edges
- Damage due to other inu-
ences not mentioned here
Also consider the ageing of the
material and continuous vibra-
tion loads due to compressors or
fans when checking.
■ Identify combustible refriger-
ant
Do not use any potential igni-
tion source when searching
for refrigerant leaks under any
circumstance. The use of a leak
detection lamp or other similar
devices with a naked ame is not
permitted.
1. Ensure that the components
are installed correctly.
2. Ensure that sealing materi-
als are not changed in such a
way that combustible gases or
objects could penetrate into the
interior of the components.
3. Spare parts must correspond
to the manufacturer’s specica-
tions.
NOTE
The use of silicones can inuence
the eectiveness of leak detection
devices! Intrinsically safe com-
ponents must not be insulated
before starting work.
■ Leak detection methods
The following leak detection
methods are permitted for sys-
tems with combustible refriger-
ants. Electronic equipment must
be used for detecting leaks.
These must be selected with the
sensitivity matched to the situ-
ation and recalibrated if neces-
sary (calibration must take place
in a refrigerant-free environ-
ment). The leak detection device
must be adjusted to the lowest
ammability limit (LFL) of the re-
frigerant. Liquid leakage instru-
ments are permitted for most
refrigerants. Chlorinated sub-
stances are the exception here
as the chlorine in combination
with the refrigerants can cause
corrosion on the copper cables.
If a leak is detected, all potential
open ignition sources must be
removed immediately. If a leak
has been detected in the system
which requires reworking of the
piping in the form of soldering,
the system must be completely
free of refrigerant or, if possible,
the aected part disconnected
from the system using stopcocks.
The aected system parts must
be ushed with oxygen-free
nitrogen run before and during
the repair work.
■ Emptying and evacuating the
system
If the refrigerant circuit must
be opened for repairs or other
reasons, this must be carried out
in a safe and professional way. In
any event, proceed with extreme
caution since ignition may occur
at any time! Stick to the follow-
ing procedure:
1. Drain the refrigerant
2. Flush the system with insert
gas
3. Evacuate
4. Repeat steps 2 to 3 if required
5. Opening the system by cutting
or soldering
The system must be ushed with
oxygen-free nitrogen in order to
guarantee safety. The ushing
process must be repeated multi-
ple times if necessary. Do not use
compressed air or oxygen for the
ushing process! After evacuat-
ing, ushing takes place by lling
with dried nitrogen until the
operating pressure is reached
and then the system must be
evacuated again. This ushing
process must often be repeated
until there is no more refriger-
ant in the system. After the last
ushing, the system must be
brought to the ambient pres-
sure in order to start work. The
ushing process is indispensable
when soldering work is required
on the piping. Ensure that the
vacuum pump outlet is not near
an ignition source and continu-
ous ventilation is guaranteed.
■ Filling process
The following requirements for
the general specications must
also be fullled during the lling
process:
- Ensure that no contamination
occurs from other refrigerants
(residues in the lling equip-
ment).
- Keep the lines as short as pos-
sible to minimise the likelihood
of residues forming.
- Filling bottles and cylinders
must be stood upright.
- Ensure that the system is
earthed before lling.
- Label the system with the re-
frigerant type designation after
lling
- Never exceed the maximum ll
level.
The system must be checked for
leaks (pressure test!) before ll-
ing. The system must be checked
for leaks once more after ll-
ing and before commissioning.
Check for leaks again when leav-
ing the work space.
11

■ Labelling when shutting down
If a unit must be taken out of op-
eration and the refrigerant must
be disposed of, the unit must
be labelled with the date and a
signature. Ensure that the note
remains attached to the combus-
tible refrigerant.
■ Transportation of units which
contain combustible refriger-
ants
National provisions must be
observed.
■ Storing of units which contain
combustible refrigerant
National provisions must be
observed.
• Transportation without the
original packaging
If the units are transported
without the original packaging,
they must be packed in such a
way that mechanical damage
is prevented. The units must be
transported upright.
12
REMKO ETF Eco Series

The units are designed exclusively
for drying and dehumidification
purposes in industrial or
commercial situations on the basis
of their structural design and
equipment.
The units must only be operated
by appropriately instructed
personnel.
A failure to observe
the manufacturer's specifications,
the respective local legal
requirements or arbitrary
alterations to the units, exempts
the manufacturer from liability
for resulting damage.
Customer service
and guarantee
As a prerequisite for any guarantee
claims to be considered, it is
essential that the ordering party
or its representative complete
and return the “Certificate of
guarantee” to REMKO GmbH &
Co. KG at the time when the units
are purchased and commissioned.
The units have been tested several
times in the factory to verify their
correct function.
However, if malfunctions should
arise that cannot be remedied by
the operator with the assistance of
the troubleshooting section, please
contact your specialist dealer or
contractual partner.
Intended use Environmental
protection and
recycling
Disposal of packaging
When disposing of packaging
material, please consider our
environment.
Our units are carefully packed
and delivered in stable transport
packaging and, if applicable,
on a wooden pallet.
The packaging materials are
environmentally-friendly and can
be recycled.
By recycling packaging materials,
you make a valuable contribution
to the reduction of waste and
conservation of raw materials.
Therefore, only dispose of
packaging material at appropriate
collection points.
Disposal of the old unit
The manufacturing process for
the units is subject to continuous
quality control.
Only high-grade materials are
processed, the majority of which
are recyclable.
You also contribute to
environmental protection by
ensuring that your old equipment
is only disposed of in an
environment friendly manner.
Therefore, only bring the old
unit to an authorised recycling
business or to an appropriate
collection point
.
NOTE
Operation that differs from
that specified in this operating
manual is prohibited.
Failing to observe this renders
any manufacturer liability
or guarantee claims void.
NOTE
Adjustment and maintenance
work may only be carried out
by authorised and qualified
technicians.
Important information
concerning recycling
The units are operated with
environmentally-friendly and
ozone-neutral R290 refrigerant.
The mixture of refrigerant and oil
within the unit must be disposed
of properly in accordance with
the statutory or locally-applicable
regulations.
CAUTION
Copyright
The redistribution, even
in part, or the use of this
documentation for purposes
other than intended is
strictly prohibited without
the written authorisation of
REMKO GmbH & Co. KG .
13

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 condensation principle
and are equipped with a
hermetically sealed refrigerant
system, low-noise and low-
maintenance fan, operating hours
counter and connection cable with
plug.
Fully-automatic operation, a
condensate container with
integrated overflow protection in
addition to connection ports for
direct condensate drainage help
to ensure continuous fault-free
operation.
The units conform to the
fundamental health and safety
requirements of the appropriate
EU regulations.
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 dehumidification
of areas such as:
■ New buildings, industrial
buildings
■ Cellar rooms, storage rooms
■ Archives laboratories
■ Weekend homes, caravans
■ Bathrooms, wash rooms and
changing rooms etc.
at the probe has increased above
a pre-set level, the unit switches
back to normal dehumidification
mode.
If the room temperature is
sufficiently high, the surface of
the fins will not be cold enough for
rime formation 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 processed, 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.
Operating sequence
The unit is switched on by pressing
the operating switch. It then
operates in continuous fully-
automatic operation.
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 time relay.
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
Schematic depiction of the workings of a REMKO air dehumidifier
Condensate container
Moist room air
Dehumidified
room air
Compressor
Capacitor
Evaporator
Fan
14
REMKO ETF Eco Series

Electrical wiring
■ The units are
operated with
220-240 V/50 Hz
alternating current
■ The electrical connection is
made using a built-in mains
cable with earthed safety plug
■ Extensions to the connection
cable may only be carried
out by authorised electricians,
subject to the length of
the cable, connected load
of the unit and taking into
consideration how the unit
is used at its location
Set-up
For the best economic and safe use
of the units, the following notes
must be followed in full:
■ The units must be set up in an
upright and level position, to
ensure that the condensate can
drain freely
■ To ensure optimum air
circulation, the units should be
set up in the centre of the room,
where possible
■ It must be ensured that the air
can be sucked in on the front
of the unit and blown out of
the rear of the unit without
obstruction
■ Observe a minimum clearance
of 50 cm from walls at all times
■ Units must never be set up in
the immediate vicinity of heaters
or other sources of heat
■ Air circulation is improved if
the unit is set up approx. 1 m
above the ground
■ The room being dried or
dehumidified must be closed to
the neighbouring atmosphere
■ Avoid having opened windows
and doors etc., and avoid
frequent entry to or exit from
the room as much as possible
■ If the units are to be used
in dusty environments or
stables, appropriate care and
maintenance measures should
be taken according to the
relevant conditions
■ The output of the unit is entirely
dependent on the conditions
inside the room, room
temperature, relative humidity
and observance of
the set-up instructions
CAUTION
All cable extensions must only
be used in fully un-reeled
or reeled off condition.
NOTE
The electrical connection
to the units must be made
at feed-points with residual
current devices in accordance
with VDE 0100, Section 704.
When installing the units in
extremely damp environments
such as laundry rooms,
showers etc., the unit must
secured with a residual
current device provided by
the customer in accordance
with the regulations.
Wall clearance
min. 0.5m
Maintain adequate clearance from
heaters or other sources of heat.
Keep windows and doors closed!
15

Starting the unit
1. Move the operating
switch [2] to the "0"
(off) position.
2. Connect the unit's
power plug to a
properly installed
and fused mains
socket. Connect
220-240 V/50 Hz.
3. Move the operating
switch [2] to the “I”
(on) position.
4. The green “in operation”
indicator light will illuminate
and the unit will operate in fully-
automatic dehumidification
mode.
Before commissioning the unit or if
local requirements dictate,
the air-inlet grill and air-outlet
grill must be checked for
contamination.
Important notes
prior to commissioning
■ All extensions to the electrical
connection must be of a
sufficient cable size and must
only be used fully rolled out
or unrolled
■ Never use the mains cable
as a pull cord
■ After being switched on,
the units operate fully-
automatically until switched
off by the float when
the condensate container is full
■ The condensate container
must be inserted properly and
the sealing flap must be locked
Commissioning
Operation and indicators
1
234
1 = Operating hours counter
2 = Operating switch
3 = GREEN indicator light
“Operation”
4 = YELLOW indicator light
“Container full”
Operation with a humidity switch
The REMKO humidity switch
(accessories) is supplied with
a special adapter.
The following procedure must be
followed when commissioning
units in conjunction with a
humidity switch:
1. Insert the adapter into a
properly fused mains socket.
2. Place the humidity switch
in a suitable location within
the room being dehumidified.
Not in the immediate vicinity
of the units or sources of heat.
3. Insert the power plug (or a cable
extension) into the adapter.
4. Set the desired air humidity on
the humidity switch.
5. Move the operating switch [2]
on the unit to position "I".
The units will switch on
automatically when the air
humidity in the room exceeds
the pre-set level on the humidity
switch.
The units will now operate fully-
automatically until the desired
relative humidity (% RH) has
been reached or until the unit is
switched off by the float when
the condensate container is full.
In the event that this occurs,
the yellow “Container full” control
lamp will illuminate.
NOTE
A contaminated grille or filter
must be cleaned or replaced
immediately.
NOTE
In room temperatures below
10°C and relative humidity
below 40% , economical use
of the unit can no longer be
guaranteed.
NOTE
The units are only fully
functional if the condensate
container is inserted properly.
16
REMKO ETF Eco Series

6. Switch the unit back on using
the operating switch [2].
Unit operation with
hose connection
The condensate container has
been provided with a connection
port (11 mm ø).
After removing the condensate
container, a water hose
(not provided) may be connected
to this connection port.
The following procedure must be
followed when connecting a water
hose:
1. Open the front sealing flap and
remove the sealing plug.
2. Insert the customer-provided
drainage hose into the
connection port (secure and seal
with a clamp if necessary).
Condensate
Depending on the air temperature
and the relative humidity,
condensed water will drip into
the condensate trap and into
the condensate container below
either continuously or only during
the defrosting phases.
A float is located inside
the condensate container.
In the event that the container
is full, the float will activate a
microswitch which will switch off
dehumidification mode.
The unit will switch off and
the yellow indicator light will
illuminate.
To empty the condensate
container, the following procedure
must be followed:
1. Move the operating switch [2]
to the "0" (off) position.
2. Open the front sealing flap [K].
3. Remove the filled condensate
container [B].
By carefully pulling the container
forwards out of the guide rails.
NOTE
The units are only fully
functional if the condensate
container is inserted properly.
NOTE
After being emptied,
the condensate container incl.
float must be checked for
damage, contamination etc.
NOTE
Beware of dripping
condensate.
After switching off the units,
the evaporator may continue
to defrost under the influence
of the ambient temperature.
4. Open the valve on the pouring
opening sideways.
4. Pour the condensate into a drain
or similar receptacle.
5. Close the pouring opening and
carefully insert the condensate
container back into the unit.
NOTE
Ensure that the small black
sealing plug is always inserted
into a fixed connection port.
Missing stoppers will give
rise to uncontrolled water
discharge.
Valve
B
K
17

3. Insert the condensate container
back and route the drainage
hose through the slot on
the right next to the condensate
container through the base
of the unit.
4. Lock the front sealing flap in
place.
Move the operating switch
to the “0” (off) position.
If the units are
inactive for long
periods, disconnect
them from
the mains power
supply.
Empty the condensate container
and dry with a clean cloth.
When storing the unit, cover with
a plastic sheet / foil if necessary
and store in an upright position in
a sheltered and dry location.
For easy transportation, the units
are equipped with 2 large
wheels and an easy-to-dismantle
transportation handle.
When transporting the units,
observe the following:
1. Before each change of location,
switch off the unit and remove
the power plug from the mains
socket.
2. Drain the condensate container.
3. If moisture remains on
the evaporator or water
remains in the condensate
container, the units must only
be transported in an upright
position.
5. Drain the condensate into
a lower-level drain.
To operate the units,
the condensate container must
always be inserted correctly and the
sealing flap must always be locked.
Unit transportShutdown
CAUTION
The mains cable must never
be used as a pull cord or fixing
device.
NOTE
Beware of dripping
condensate.
After switching off the units,
the evaporator may continue
to defrost under the influence
of the ambient temperature.
CAUTION
In order to prevent damage
to the compressor, wait for
approx. 2 to 3 minutes before
switching the unit back on
again.
NOTE
Ensure that the drainage
hose is placed at an incline
to the drain to allow
the condensate to drain from
the condensate container
without hindrance.
NOTE
Beware of dripping
condensate.
After switching off the units,
the evaporator may continue
to defrost under the influence
of the ambient temperature.
18
REMKO ETF Eco Series

Cleaning the units
The unit housing must be opened
to allow the inside of the unit to be
cleaned and to provide access to
electrical components.
1. Remove the power plug from
the mains socket.
2. Disassemble the transportation
bracket (A) and the stand (B) by
removing the 4 threaded screws.
3. Dismantle both side covering
panels (C).
To do this, loosen each
self-tapping screw from
the underside, slide the sheet
downwards towards the wheel
and then upwards out of
the holder.
Remove the earth conductor
on the inside of the panel.
Cleaning the dust filter
Slide the protection grid upwards
slightly, then pull forwards and
remove downwards.
Then remove the dust filter which
has now been released.
Light contamination of the dust
filter may be remedied with careful
blowing or suction.
Heavier contamination may be
remedied by rinsing the filter in
a lukewarm (max. 40°C) soap
solution.
Finally, always rinse the filter
carefully with clear water and
allow to dry!
Before refitting the dust filter,
ensure that its fully dry and that
no damage has been sustained.
The units may only be operated
with the dust filter in place.
■ Observe the regular care and
maintenance intervals
■ In accordance with
the operating conditions,
the units must, if necessary,
be checked at least yearly by a
specialist to ensure that they are
in a condition that is safe to use
■ Keep the units free of dust and
other debris
■ Only clean the units with a dry
or moistened cloth
■ Never subject to direct jets of water
e.g. pressure washers etc.
■ Never use abrasive or solvent-
based cleaners
■ Use only suitable cleaners, even
for heavy contamination
Care and maintenance
All moving parts have a low-
maintenance permanent coat of
lubricant. The refrigerant system is
designed as a hermetically sealed
system and may only be repaired
by a specialist.
NOTE
Regular care and maintenance
is fundamental to a long
service life and fault-free
operation of the unit.
CAUTION
Before undertaking any work
on the units, the power
plug must be removed from
the mains socket.
NOTE
Heavily contaminated dust
filters must be replaced with
new parts.
Only original spare parts may
be used.
CAUTION
Check the inlet and outlet
grille and the dust filter for
contamination on a regular basis.
NOTE
Adjustment and maintenance
work may only be carried out
by authorised and qualified
technicians.
B
C
A
19

Troubleshooting
The units are manufactured
using state-of-the-art production
methods and tested several times
to verify their correct function.
However, if a functional fault
should occur, the unit should first
be checked in accordance with the
following list.
The unit does not start
■ Check the setting of
the operating switch. The green
indicator light should illuminate
■ Check power supply
220-240 V/1~/50 Hz
■ Check the power plug and
the cable for damage
■ Check the customer-provided
mains protection.
Minimum protection 10A
■ Check the level and correct
positioning of the condensate
container.
The front sealing flap must be
fully closed and locked
■ Check the function of
the microswitch
■ Check the setting of
the humidity switch
(accessories).
The pre-set value must be
lower than the relative humidity
in the room
■ Check the humidity switch
adapter for damage and correct
positioning
The unit runs but does not
form any condensate
■ Check the room temperature.
The operating range of the unit
is between 3°C and 32°C
■ Check the air humidity, at least
40 % RH is required
■ Check the setting of
the humidity switch, set a lower
humidity value if necessary
■ Check the dust filter for
contamination and clean or
replace if necessary
■ Check the evaporator
and condenser fins for
contamination and clean if
necessary
■ Check the evaporator for ice
or rime formation. If ice has
formed, check the functionality
of the automatic defrost and
the temperature sensor
■ Check whether or not
the evaporator temperature is
below room temperature. If this is
not the case, check the automatic
defrost or room temperature
The unit does not start
■ Check whether or not the
condensate container is inserted
correctly and that the front
sealing flap is locked
■ Check whether or not mains
power is available
CAUTION
Work on the refrigerant
system and on the electrical
equipment must only be
conducted by a specially
authorised specialist!
CAUTION
An electrical safety check must
be carried out in accordance
with VDE 0701 after any work
on the units.
4. Clean the condenser fins by
blowing, with suction or using a
smooth brush.
5. Exercise extreme caution when
cleaning the condenser. The fine
aluminium fins bend very easily.
6. Never subject to sharp jets of
water (high-pressure cleaners).
7. Clean the evaporator fins, for
example with a lukewarm soap
solution (or similar).
8. Rinse with clean water to
remove any remaining soap.
9. Clean the internal surfaces of
the entire unit as well as the fan
blade.
10.Once cleaning has been
completed, the unit should be
dried with care.
Take particular care with
electrical components!
11.Re-install all dismantled
components in reverse order.
12.Carry out a unit function check
and electrical safety check.
NOTE
If the unit fails to function
correctly after the checks have
been carried out, contact an
authorised specialist.
20
REMKO ETF Eco Series