Aktobis WDH-520EB User manual

WDH-520EB

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WARNING
Only install and operate this appliance as outlined in this instruction manual. At all
times,use care when using this appliance.
Do not modify this appliance in any way to avoid danger.
Electrical equipment and installations regulated by national legislation must be
followed.
Children must not use this appliance unsupervised.
For safety reasons, anyone with paychological, physical or any medical condition
that may impair judgment should only use this appliance when under the supervision
of a responsible adult.
For safety sake, never use a damaged power cable; always refer to the
manufacturer or an authorized technical service centre if appliance requires repair
It is essential that the appliance is connected to an efficient earth system checked
by a qualified electrician.
The use of extension cables is not recommended.
Do not place the air conditioner near any heating appliance.
The appliance should be transported upright or on its side, Any internal circuit water
should be emptied before moving. Do not turn on the appliance for at least one hour
before starting it.
Flammable substances or pressurised containers (eg aerosol cans ) should be kept
a minimum of 50cms away.
The appliance should not be installed in rooms containing sulphur,gas or oil.
Do not disconnect the appliance by pulling on the power cable; always disconnect
the appliance before any cleaning or maintenance is undertaken.
Do not store anything on top of the appliance, especially heavy or hot objects.
Repairs must only be undertaken by authorised service centres of the manufacturer.
Failure to comply may be dangerous.
Do not store the appliance covered with plastic bags.
Remember the environment when disposing of packaging around the appliance and
when the appliance has reached its used by date.
A warning that the appliance shall be stored in a well-ventilated area where the
room size corresponds to the room area as specified for operation.
A warning to keep ventilation openings clear of obstruction.
This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervisionor instruction concerning use of the
appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without supervision.
This appliance is for indoor use only.(The appliance cannot be used in laundry room.)
WARNING
Only install and operate this appliance as outlined in this instruction manual. At all
times,use care when using this appliance.
Do not modify this appliance in any way to avoid danger.
Electrical equipment and installations regulated by national legislation must be
followed.
Children must not use this appliance unsupervised.
For safety reasons, anyone with paychological, physical or any medical condition
that may impair judgment should only use this appliance when under the supervision
of a responsible adult.
For safety sake, never use a damaged power cable; always refer to the
manufacturer or an authorized technical service centre if appliance requires repair
It is essential that the appliance is connected to an efficient earth system checked
by a qualified electrician.
The use of extension cables is not recommended.
Do not place the air conditioner near any heating appliance.
The appliance should be transported upright or on its side, Any internal circuit water
should be emptied before moving. Do not turn on the appliance for at least one hour
before starting it.
Flammable substances or pressurised containers (eg aerosol cans ) should be kept
a minimum of 50cms away.
The appliance should not be installed in rooms containing sulphur,gas or oil.
Do not disconnect the appliance by pulling on the power cable; always disconnect
the appliance before any cleaning or maintenance is undertaken.
Do not store anything on top of the appliance, especially heavy or hot objects.
Repairs must only be undertaken by authorised service centres of the manufacturer.
Failure to comply may be dangerous.
Do not store the appliance covered with plastic bags.
Remember the environment when disposing of packaging around the appliance and
when the appliance has reached its used by date.
A warning that the appliance shall be stored in a well-ventilated area where the
room size corresponds to the room area as specified for operation.
A warning to keep ventilation openings clear of obstruction.
This appliance can be used by children aged from 8 years and above and persons
with reduced physical, sensory or mental capabilities or lack of experience and
knowledge if they have been given supervisionor instruction concerning use of the
appliance in a safe way and understand the hazards involved.
Children shall not play with the appliance.
Cleaning and user maintenance shall not be made by children without supervision.
This appliance is for indoor use only.(The appliance cannot be used in laundry room.)

Additional warnings for appliances with R290 refrigerant gas (refer to the rating plate
for the type of refrigerant gas used)
READ THE MANUAL CAREFULLY BEFORE USING THE APPLIANCE
R290 refrigerant gas complies with European environmental directives,
This appliance contains a pproximately 0.115 kg of R290 refrigerant gas. The
maximum refrigerant charge amount is 0.3 kg;
The minimum rated airflow is 148 m³/h;
Do not pierce or burn.
Use only implements recommended by the manufacturer for defrigerant gas. The
Do not use the appliance in a room with continuously operating sources of ignition.
(eg. Open flames, an operating gas appliance or an operating electrical heaters.
Do not perforate any of the components in the refrigerant circuit.
Refrigerant gas may be odorless.
A surface area greater than 4 m² is necessary for the installation, use and storage of
the appliance.
Stagnation of possible leaks of refrigerant gas in unventilated rooms could lead
to fire or an explosion hazard should the refrigerant come in contact with electric
heaters, stoves or other sourced of ignition.
Use care when storing the appliance to prevent mechanical faults.
Only persons authorized by an accredited agency certifying their competence to
handle refrigerants in compliance with sector legislation should work on refrigerant
circuits.
Maintenance and repairs requiring the assistance of other qualified personnel
must be carried out under the supervision of specialists in the use of inflammable
refrigerants.
Correctly dispose of the product at the end of its working life.
Do not send to urban waste but use a specialized waste collection centre or a
dealer providing this service. Correct disposal allows recycling,
conserving energy and resources and avoids negative consequences to
the environment and health. Refer to crossed out wheeled dustbin symbol
as a reminder.
WARNING
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WARNING
Do not use means to accelerate the defrosting process or to clean, other than those
recommended by the manufacturer.
The appliance shall be stored in a room without continuously operating ignition
sources (for example: open flames, an operating gas appliance or an operating
electric heater.
Do not pierce or burn.
Be aware that refrigerants may not contain an odour,
Appliance shall be installed, operated and stored in a room with a floor area larger
than 4 m²。
WARNING
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1.Checks to the 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.
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.
2.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. Ensure that the conditions within the area
have been made safe by control of flammable material.
3.Checking for 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. nonsparking, adequately sealed or intrinsically safe.
4.presence of 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 CO2 fire extinguisher adjacent to the charging area.
5.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.
6.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.
7.Checks to the refrigeration equipment
Where electrical components are being changed, they shall be fit for the purpose
and to the correct specification. At all times the manufacturer’s maintenance and
service guidelines shall be followed. If in doubt consult the manufacturer’s technical
department for assistance.
The following checks shall be applied to installations using flammable refrigerants:
- the charge size is in accordance with the room size within which the refrigerant
containing parts are installed:
INSTRUCTION FOR REPAIRING APPLIANCES CONTAINING R 290
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INSTRUCTION FOR REPAIRING APPLIANCES CONTAINING R 290
- the ventilation machinery and outlets are operating adequately and are not
obstructed;
8.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;
- that there no live electrical components and wiring are exposed while charging,
recovering or purging the system;
- that there is continulty of earth bonding
9.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 silicon sealant may inhibit the effectiveness of some types of leak
detection equipment. lntrinsically safe components do not have to be isolated prior to
working on them.
10.Repair to intrinsically safe components
Do not apply any permanent inductive or capacitance 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 at 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.
11.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.
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INSTRUCTION FOR REPAIRING APPLIANCES CONTAINING R 290
12.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) shall not be used.
13.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.
14.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 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 OFNcharge is used, the system shall be vented
down to atmospheric pressure to enable work to takeplace. 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 isventilation available.
15. 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
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INSTRUCTION FOR REPAIRING APPLIANCES CONTAINING R 290
amount of refrigerant contained in them.
- Cylinders shall be kept upright.
- Ensure that the refrigeration system is earthed prior to charging the system with
refrigerant.
- Label the system when charging is complete (if not already).
- Extreme care shall be taken not to overfill the refrigeration system.
Prior to recharging the system it shall be pressure tested with OFN. The system shall
be leak tested on completion of charging but prior to commissioning. A follow up leak
test shall be carried out prior to leaving the site.
16. Decommissioning
Before carrying out this procedure, it is essential that the technician is completely
familiar with the equipment and all its detail. It is recommended good practice that
all refrigerants are recovered safely. Prior to the task being carried out, an oil and
refrigerant sample shall be taken in case analysis is required prior to re-use of
reclaimed refrigerant. It is essential that electrical power is available before the task is
commenced.
a) Become familiar with the equipment and its operation.
b) Isolate system electrically.
c) Before attempting the procedure ensure that:
mechanical handling equipment is available, If required, for handling refrigerant
cylinders;
all personal protective equipment is available and being used correctly; the recovery
process is supervised at all times by a competent person; recovery equipment and
cylinders conform to the appropriate standards.
d) Pump down refrigerant system, If possible.
e) If a vacuum is not possible, make a manifold so that refrigerant can be removed
from various parts of the system.
f) Make sure that cylinder is situated on the scales before recovery takes place.
g) Start the recovery machine and operate in accordance with manufacturer’s
instructions.
h) Do not overfill cylinders. (No more than 80 % volume liquid charge).
i) Do not exceed the maximum working pressure of the cylinder, even temoorarily.
j) When the cylinders have been filled correctly and the process completed, make sure
that the cylinders and the equipment are removed from site promptly and all isolation
valves on the equipment are closed off.
k) Recovered refrigerant shall not be charged into another refrigeration system unless
it has been cleaned and checked.
17.Labelling
Equipment shall be labelled stating that it has been de-commissioned and emptied of
refrigerant. The label shall be dated and signed. Ensure that there are labels on the
equipment stating the equipment contains flammable refrigerant.
18.Recovery
When removing refrigerant from a system, either for servicing or decommissioning, it is
recommended good practice that all refrigerants are removed safely.
When transferring refrigerant into cylinders, ensure that only appropriate refrigerant
recovery cylinders are employed. Ensure that the correct number of cylinders for
holding the total system charge are available. All cylinders to be used are designated
for the recovered refrigerant and labelled for that refrigerant (i.e. special cylinders

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for the recovery of refrigerant). Cylinders shall be complete with pressure relief valve
and associated shut-off valves in good working order. Empty recovery cylinders are
evacuated and, if possible, cooled before recovery occurs.
The recovery equipment shall be in good working order with a set of instructions
concerning the equipment that is at hand and shall be suitable for the recovery of
flammable refrigerants.
In addition. a set of calibrated weighing scales shall be available and in good working
order. Hoses shall be complete with leak-free disconnect couplings and in good
condition. Before using the recovery machine, check that it is in satisfactory working
order, has been properly maintained and that any associated electrical components are
sealed to prevent ignition in the event of a refrigerant release. Consult manufacturer if
in doubt.
The recovered refrigerant shall be returned to the refrigerant supplier in the correct
recovery cylinder, and the relevant Waste Transfer Note arranged. Do not mix
refrigerants in recovery units and especially not in cylinders.
If compressors or compressor oils are to be removed, ensure that they have been
evacuated to an acceptable level to make certain that flammable refrigerant does
not remain within the lubricant. The evacuation process shall be carried out prior to
returning the compressor to the suppliers. Only electric heating to the compressor body
shall be employed to accelerate this process. When oil is drained from a system, it
shall be carried out safely.
19.Transport of equipment containing flammable refrigerants (Annex CC.1)
Compliance with the transport regulations
20.Discarded appliances supplies flammable refrigerants
See National Regulations.
21. Storage of equipment/appliances
The storage of equipment should be in accordance with the manufacturer’s
instructions.
22.Storage of packed (unsold) equipment
Storage package protection should be constructed such that mechanical damage to
the equipment inside the package will not cause a leak of the refrigerant charge.
The maximum number of pieces of equipment permitted to be stored together will be
determined by local regulations.
23.Marking of equipment using signs
See local regulations
INSTRUCTION FOR REPAIRING APPLIANCES CONTAINING R 290

- 16 -
SPECIFICATIONS
MODEL
POWER
CAPACITY
SIZE OF SHELL ( W H D )× ×
WEIGHT
OPERATING TEMPERATURE 5℃ ~ 32℃
345*621*261 mm
Waste electrical products should not be disposed of with household waste.
Please recycle where facilities exist. Check with your local authority or retailer
for recycling advice.
VOLTAGE/FREQUENCY
220-240V~50Hz
20L / D
(30°C,80%RH)
505 W
WDH-520EB
12.9kg
FUSE
REFRIGERANT R290 / 0.115 kg
The User's manual and specific instructions related to the safe operation of this
appliance are also available in website www.....
T1A.L 250V