Clas Ohlson MDDF-20DEN7-QA3 User manual

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Dehumidier
SE | Luavfuktare
NO| Luavfukter
FI | Ilmankuivain
Art.no. Model
36-8322 MDDF-20DEN7-QA3
Ver. 20220324
Original instructions
Bruksanvisning i original
Originalbruksanvisning
Alkuperäinen käyttöohje

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Dehumidifier
Art.no 36-8322 Model MDDF-20DEN7-QA3
Please read theentire instruction manual before using theproduct and then save it for
future reference. We reserve theright for any errors in text or images and any necessary
changes made to technical data. In theevent of technical problems or other queries,
please contact our Customer Services (see address details on theback).
Safety
• The product must only be connected to a230 V, 50 Hz
earthed power socket protected by anRCD.
• The product may be used by children aged 8 years and above
and by persons with reduced physical, sensory or mental
capability or lack of experience and knowledge provided they
have been given supervision or instruction concerning use of
theproduct in asafe way and understand thehazards involved.
• This appliance is not intended for use by persons (including
children) with reduced physical, sensory or mental capabilities,
or lack of experience and knowledge, unless they have
been given supervision or instruction concerning use of the
appliance by a person responsible for their safety.
• If the mains lead is damaged, it must only be replaced by the
manufacturer, one of their service centres or a qualified person
in order to avoid a hazard.
• Never let children play with theproduct.
• The product must always stand upright.
• Never sit on, cover or place foreign objects on theproduct.
• The product must stand upright for at least 1 hour before
it is used for thefirst time. The same applies if theproduct
has been tilted from its upright position whilst being moved,
cleaned, etc.
• Never use theproduct if themains lead, plug or any other part
is damaged or does not work properly.
• Never try to dismantle or repair theproduct yourself.

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Warning: When using refrigerant R290.
• If theproduct needs to be used with anextension lead or
trailing socket, make sure that thelead used is suitable for use
with theproduct.
• Never plug in or unplug theproduct with wet hands.
• Never insert foreign objects into theopenings in theproduct.
• Unplug theproduct immediately if it emits strange noises,
odours or smoke.
• Unplug theproduct immediately if it tips over or if it is splashed
with water. Contact aqualified service technician before using
theproduct again.
• The product must not be covered in any way. Make sure that
no foreign objects cover or block theair inlet/outlet. Blockages
can lead to fires, electric shocks or damage to theproduct.
• Unplug theproduct when it is not in use.
• Never use themains lead plug for turning theproduct on or off.
The product should only be switched on and off using theon/
off switch.
• Before moving theproduct, make sure it is switched off,
unplugged and that thewater tank is empty.
• Never expose theproduct to running/splashing water or other
liquids.
• Liquid coming in contact with electrical components can be
extremely hazardous.
• Do not place theproduct where it could fall into water or
other liquid.
• Do not place any objects which contain liquid such as vases or
drinks onto theproduct.

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IMPORTANT NOTE: Read this instruction manual
carefully before installing or using thedehumidifier unit.
Keep this instruction manual for future reference.
• Do not use any other agents than those recommended by
themanufacturer for cleaning or to speed up thedefrosting
process.
• Never use theproduct in areas where flammable liquids/
materials or gases (petrol, solvents, gas cylinders) are stored
or used.
• Make sure that there are no holes or burns on theproduct.
• Be aware that refrigerants can be odourless.
• The product should be used in areas with afloor space greater
than 4 m².
Safety regulations for service and repair work
Repairs must only be carried out by authorised service personnel
and only using genuine spare parts.
1. Check thework area
Prior to beginning work on systems containing flammable
refrigerants, safety checks are necessary to ensure that therisk
of ignition is minimised. For repair to therefrigerating system,
thefollowing precautions shall be complied with prior to
conducting work on thesystem.
2. Work procedure
Work shall be undertaken under acontrolled procedure so as
to minimise therisk of aflammable gas or vapour being present
while thework is being performed.
3. General work area
All maintenance staff and others working in thelocal area shall
be instructed on thenature of work being carried out. Work in
confined spaces shall be avoided. The area around theworkspace
shall be sectioned off. Make sure that theconditions within
thearea have been made safe by control of flammable material.

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4. Checking for thepresence of refrigerant
The area shall be checked with anappropriate refrigerant
detector prior to and during work, to ensure thetechnician
is aware of potentially flammable atmospheres. Ensure that
theleak detection equipment being used is suitable for use with
flammable refrigerants, i.e. non-sparking, adequately sealed or
intrinsically safe.
5. Presence of afire extinguisher
If any hot work is to be conducted on therefrigeration equipment
or any associated parts, appropriate fire extinguishing equipment
shall be available to hand. Have adry powder or CO2fire
extinguisher adjacent to thecharging area.
6. No ignition sources
No person carrying out work in relation to arefrigeration system
which involves exposing any pipe work that contains or has
contained flammable refrigerant shall use any sources of ignition
in such amanner that it may lead to therisk of fire or explosion.
All possible ignition sources, including cigarette smoking, should
be kept sufficiently far away from thesite of installation, repairing,
removing and disposal, during which flammable refrigerant can
possibly be released to thesurrounding space. Prior to work
taking place, thearea around theequipment is to be surveyed to
make sure that there are no flammable hazards or ignition risks.
‘NO SMOKING’ signs shall be displayed.
7. Ventilated area
Ensure that thearea is in theopen or that it is adequately
ventilated before breaking into thesystem or conducting any hot
work. A degree of ventilation shall continue during theperiod that
thework is carried out. The ventilation should safely disperse
any released refrigerant and preferably expel it externally into
theatmosphere.

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8. Checks to therefrigeration equipment
Where electrical components are being changed, they shall
be fit for thepurpose and to thecorrect specification. The
manufacturer’s maintenance and service guidelines shall be
followed at all times. If in doubt consult themanufacturer’s
technical department for assistance. The following checks shall
be applied to installations using flammable refrigerants:
• That thecharge size is in accordance with theroom size within
which therefrigerant containing parts are installed.
• That theventilation machinery and outlets are operating
adequately and are not obstructed.
• That if anindirect refrigerating circuit is being used,
thesecondary circuit shall be checked for thepresence of
refrigerant. That markings on theequipment continue to be
visible and legible.
• Markings and signs that are illegible shall be corrected.
• Refrigeration pipe or components are installed in aposition
where they are unlikely to be exposed to any substance
which may corrode refrigerant containing components, unless
thecomponents are constructed of materials which are
inherently resistant to being corroded or are suitably protected
against being so corroded.
9. Checks to electrical devices
Repair and maintenance to electrical components shall include
initial safety checks and component inspection procedures. If afault
exists that could compromise safety, then no electrical supply
shall be connected to thecircuit until it is satisfactorily dealt with.
If thefault cannot be corrected immediately but it is necessary to
continue operation, anadequate temporary solution shall be used.
This shall be reported to theowner of theequipment so all parties
are advised. Initial safety checks shall include:
• That capacitors are discharged: this shall be done in asafe
manner to avoid possibility of sparking.

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• That no live electrical components and wiring are exposed
while charging, recovering or purging thesystem.
• That there is continuity of earth bonding.
10. Repairs to sealed components
During repairs to sealed components, all electrical supplies shall
be disconnected from theequipment being worked upon prior
to any removal of sealed covers, etc. If it is absolutely necessary
to have anelectrical supply to equipment during servicing, then
apermanently operating form of leak detection shall be located at
themost critical point to warn of apotentially hazardous situation.
Particular attention shall be paid to thefollowing to ensure that
by working on electrical components, thecasing is not altered in
such away that thelevel of protection is affected. This shall include
damage to cables, excessive number of connections, terminals
not made to original specification, damage to seals, incorrect
fitting of glands, etc.
• Ensure that apparatus is mounted securely.
• Ensure that seals or sealing materials have not degraded such
that they no longer serve thepurpose of preventing theingress
of flammable atmospheres. Replacement parts shall be in
accordance with themanufacturer’s specifications.
Note: The use of silicone sealant may inhibit theeffectiveness
of some types of leak detection equipment. Intrinsically safe
components do not have to be isolated prior to working on them.
11. Repair of intrinsically safe components
Do not apply any permanent inductive or capacitive loads to
thecircuit without ensuring that this will not exceed thepermissible
voltage and current permitted for theequipment in use. Intrinsically
safe components are theonly types that can be worked on while
live in thepresence of aflammable atmosphere. The test apparatus
shall be of thecorrect rating. Replace components only with parts
specified by themanufacturer. Other parts may result in theignition
of refrigerant in theatmosphere from aleak.

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12. Cabling
Check that cabling will not be subject to wear, corrosion,
excessive pressure, vibration, sharp edges or any other adverse
environmental effects. The check shall also take into account
theeffects of aging or continual vibration from sources such as
compressors or fans.
13. Detection of flammable refrigerants
Under no circumstances shall potential sources of ignition be used
in thesearching for or detection of refrigerant leaks. A halide torch
(or any other detector using anaked flame) must not be used.
14. Leak detection methods
The following leak detection methods are deemed acceptable
for systems containing flammable refrigerants. Electronic leak
detectors shall be used to detect flammable refrigerants, but
thesensitivity may not be adequate, or may need re-calibration.
Detection equipment shall be calibrated in arefrigerant-free area.
Ensure that thedetector is not apotential source of ignition and
is suitable for therefrigerant used.
Leak detection equipment shall be set at apercentage of theLFL
of therefrigerant and shall be calibrated to therefrigerant employed
and theappropriate percentage of gas (25 % maximum) is
confirmed. Leak detection fluids are suitable for use with most
refrigerants but theuse of detergents containing chlorine shall be
avoided as thechlorine may react with therefrigerant and corrode
thecopper pipe-work.
If aleak is suspected, all naked flames shall be removed/
extinguished. If aleakage of refrigerant is found which requires
brazing, all of therefrigerant shall be recovered from thesystem,
or isolated (by means of shut off valves) in apart of thesystem
remote from theleak. Oxygen-free nitrogen (OFN) shall then be
purged through thesystem both before and during thebrazing
process.

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15. Removal and evacuation
When breaking into therefrigerant circuit to make repairs (or
for any other purpose) conventional procedures shall be used.
However, it is important that best practice is followed since
flammability is aconsideration. The following procedure shall be
adhered to:
• Remove therefrigerant.
• Purge thecircuit with inert gas.
• Evacuate.
• Purge again with inert gas.
• Open thecircuit by cutting or brazing.
The refrigerant charge shall be recovered into thecorrect recovery
cylinders. The system shall be flushed with OFN to render
theunit safe. This process may need to be repeated several
times. Compressed air or oxygen shall not be used for this task.
Flushing shall be achieved by breaking thevacuum in thesystem
with OFN and continuing to fill until theworking pressure is
achieved, then venting to atmosphere, and finally pulling down to
avacuum.
This process shall be repeated until no refrigerant is within
thesystem.
When thefinal OFN charge is used, thesystem shall be vented
down to atmospheric pressure to enable work to take place. This
operation is absolutely vital if brazing operations on thepipe-work
are to take place. Ensure that theoutlet for thevacuum pump is not
close to any ignition sources and there is aventilation available.
16. Charging procedures
In addition to conventional charging procedures, thefollowing
requirements shall be followed:
• Ensure that contamination of different refrigerants does not
occur when using charging equipment. Hoses or lines shall
be as short as possible to minimise theamount of refrigerant
contained in them.