Aktobis AG WDH-520EB Manuel de démarrage rapide - Page 3

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Important safety instructions for repairing an appliance with R290 refrigerant:
1. Check the environment
Before you start working on systems containing flammable refrigerants, safety checks are required to ensure that the risk of
ignition is minimized. When repairing the refrigerant system, the following safety precautions must be observed and complied
with before any work is carried out on the system.
Procedure
The work must be carried out under a controlled procedure to minimize the risk of flammable gases or vapours being present
during the work.
2. General work area
All maintenance personnel and other persons in the vicinity must be instructed on the type of work to be carried out. Work in
confined spaces must be avoided. The area around the work area must be cordoned off. Ensure that the conditions in the work
area have been made safe by checking the flammable material.
3. Check for the presence of refrigerants
The area must be checked with a suitable refrigerant detector before and during the work to ensure that the technician is aware
of possible flammable atmospheres. Ensure that the refrigerant detector used is suitable for working with flammable refrigerants,
e.g. non-sparking, adequately sealed and intrinsically safe.
4. Presence of a fire extinguisher
If hot work is to be carried out on the refrigerant equipment or associated parts, suitable fire extinguishing equipment must be
readily available. Ensure that a dry powder fire extinguisher or a CO2 fire extinguisher is nearby.
5. No ignition sources
Persons carrying out work in connection with a refrigerant system which involves exposure to piping containing or having
contained flammable refrigerant must use ignition sources in such a way that they cannot cause a fire or explosion hazard. All
possible ignition sources, including cigarette smoking, should be kept sufficiently away from the site of installation, repair and
disposal during which the flammable refrigerant may be released into the surrounding area. Prior to work, the area around the
equipment must be inspected to ensure that there are no flammable hazards or ignition risks. "No Smoking" signs must be
posted.
6. Ventilated area
Ensure that the work area is outdoors or adequately ventilated before interfering with the system or performing hot work.
Sufficient ventilation must be ensured for the entire duration of the work to be carried out. The ventilation should safely disperse
any released refrigerant and preferably discharge it externally to the atmosphere.
7. Testing the refrigerant equipment
When electrical components are replaced, they must be fit for purpose and of the correct specification. The manufacturer's
guidelines for maintenance and repair must be observed and followed at all times. If in doubt, contact the manufacturer's
technical department for assistance.
The following checks must be applied to installations containing flammable refrigerants:
- The charging quantity is in accordance with the room size within which the refrigerant containing parts are installed;
- The ventilation equipment and the ventilation outlets are running properly and are not blocked.
8. Checking the electrical equipment
Before repairing and maintaining electrical components, preliminary safety checks and inspection procedures must be carried
out on the components. If there is a defect that could jeopardize safety, the appliance must not be connected to the power
supply until the defect has been rectified. If the defect cannot be rectified immediately but operation must continue, an adequate
temporary solution must be found. This must be reported to the owner of the equipment so that all parties are informed.
The preliminary safety checks must include
Capacitors must be discharged; this should be done in a safe manner to avoid the possibility of sparking.
No live components or wiring shall be exposed when filling, restoring or flushing the system. Continuity of the earth connection.
Aktobis AG, Borsigstr. 20, D-63110 Rodgau / Germany
www.AKTOBIS.de