Panasonic WH-UD03JE5 Installationshandbuch Seite 4

2.
Servicing
2-1. Service personnel
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Any qualifi ed person who is involved with working on or breaking into a refrigerant circuit should hold a current valid certifi cate from an
industry-accredited assessment authority, which authorizes their competence to handle refrigerants safely in accordance with an industry
recognized assessment specifi cation.
•
Servicing shall only be performed as recommended by the equipment manufacturer. Maintenance and repair requiring the assistance of other
skilled personnel shall be carried out under the supervision of the person competent in the use of fl ammable refrigerants.
•
Servicing shall be performed only as recommended by the manufacturer.
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The system is inspected, regularly supervised and maintained by a trained and certifi ed service personnel who is employed by the person user
or party responsible.
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Ensure the actual refrigerant charge is in accordance with the room size within which the refrigerant containing parts are installed.
•
Ensure refrigerant charge not to leak.
2-2. Work
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Prior to beginning work on systems containing fl ammable refrigerants, safety checks are necessary to ensure that the risk of ignition is
minimised.
For repair to the refrigerating system, the precautions in #2-2 to #2-8 must be followed before conducting work on the system.
•
Work shall be undertaken under a controlled procedure so as to minimize the risk of a fl ammable gas or vapour being present while the work
is being performed.
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All maintenance staff and others working in the local area shall be instructed and supervised on the nature of work being carried out.
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Avoid working in confi ned spaces. Always ensure away from source, at least 2 meter of safety distance, or zoning of free space area of at
least 2 meter in radius.
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Wear appropriate protective equipment, including respiratory protection, as conditions warrant.
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Keep all sources of ignition and hot metal surfaces away.
2-3. Checking for presence of refrigerant
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The area shall be checked with an appropriate refrigerant detector prior to and during work, to ensure the technician is aware of potentially
fl ammable atmospheres.
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Ensure that the leak detection equipment being used is suitable for use with fl ammable refrigerants, i.e. non sparking, adequately sealed or
intrinsically safe.
•
In case of leakage/spillage happened, immediately ventilate area and stay upwind and away from spill/release.
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In case of leakage/spillage happened, do notify persons down wind of the leaking/spill, isolate immediate hazard area and keep unauthorized
personnel out.
2-4. Presence of fi re extinguisher
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If any hot work is to be conducted on the refrigerating equipment or any associated parts, appropriate fi re extinguishing equipment shall be
available at hand.
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Have a dry powder or CO
2-5. No ignition sources
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No person carrying out work in relation to a refrigerating system which involves exposing any pipe work that contains or has contained
fl ammable refrigerant shall use any sources of ignition in such a manner that it may lead to the risk of fi re or explosion. He/She must not be
smoking when carrying out such work.
•
All possible ignition sources, including cigarette smoking, should be kept suffi ciently far away from the site of installation, repairing, removing
and disposal, during which fl ammable refrigerant can possibly be released to the surrounding space.
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Prior to work taking place, the area around the equipment is to be surveyed to make sure that there are no fl ammable hazards or ignition risks.
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"No Smoking" signs shall be displayed.
2-6.Ventilated area
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Ensure that the area is in the open or that it is adequately ventilated before breaking into the system or conducting any hot work.
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A degree of ventilation shall continue during the period that the work is carried out.
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The ventilation should safely disperse any released refrigerant and preferably expel it externally into the atmosphere.
2-7. Checks to the refrigerating equipment
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Where electrical components are being changed, they shall be fi t for the purpose and to the correct specifi cation.
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At all times the manufacturer's maintenance and service guidelines shall be followed.
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If in doubt consult the manufacturer's technical department for assistance.
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The following checks shall be applied to installations using fl ammable refrigerants.
- The actual refrigerant charge is in accordance with the room size within which the refrigerant containing parts are installed.
- The ventilation machinery and outlets are operating adequately and are not obstructed.
- If an indirect refrigerating circuit is being used, the secondary circuit shall be checked for the presence of refrigerant.
- Marking to the equipment continues to be visible and legible. Markings and signs that are illegible shall be corrected.
- Refrigerating 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 properly protected against being so corroded.
2-8. Checks to electrical devices
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Repair and maintenance to electrical components shall include initial safety checks and component inspection procedures.
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Initial safety checks shall include but not limit to:-
- That capacitors are discharged: this shall be done in a safe manner to avoid possibility of sparking.
- That there is no live electrical components and wiring are exposed while charging, recovering or purging the system.
- That there is continuity of earth bonding.
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At all times the manufacturer's maintenance and service guidelines shall be followed.
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If in doubt consult the manufacturer's technical department for assistance.
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If a fault exists that could compromise safety, then no electrical supply shall be connected to the circuit until it is satisfactorily dealt with.
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If the fault cannot be corrected immediately but it is necessary to continue operation, an adequate temporary solution shall be used.
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The owner of the equipment must be informed or reported so all parties are advised thereinafter.
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fi re extinguisher adjacent to the charging area.
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