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of fire or explosion.
Every possible source of ignition, among which cigarette smoke, must be kept at a due distance
from the place of installation, repair, removal or disposal, where there is a risk of the refrigerant
liquid leaking into the surrounding space.
Before performing the job, the area surrounding the appliance must be controlled in order to
ascertain that there are no inflammable substances or risks of ignition present.
NO SMOKING signs must be displayed.
g. Ventilated area
Make sure that the area is open or suitably ventilated before interacting with the system or
performing any operation at high temperatures.
Ensure constant ventilation during the operations period.
Ventilation must safely disperse all refrigerant released and, if possible, expel it outside into
the atmosphere.
h. Refrigeration system checks
If modified, the electric components must be suitable for the purpose and compliant with the
correct specifications.
Always follow the manufacturer's guide lines relative to maintenance and technical after-sales
assistance. If in doubt, consult the manufacturer's technical after-sales service.
The plants that use inflammable refrigerants must be subjected to the following verifications:
• the dimension of the load must be compliant with the chamber in which the components
containing the refrigerant are installed;
• the plants and ventilation outlets must operate adequately and not be obstructed;
• if an indirect refrigeration circuit is in use, check the presence of refrigerant in the secondary
circuit; the marking on the systems must be visible and legible;
• illegible markings and signs must be corrected;
• the pipe or refrigeration components must be installed in a position where it is improbable
that they are exposed to substances that could corrode the components containing the
refrigerant, unless the components are manufactured with intrinsically corrosion resistant
materials or are appropriately protected from corrosive agents.
i. Check the electric devices
The repair and maintenance interventions of electric components must envision initial safety
checks and component inspection procedures.
In the case of a fault which may compromise safety, no electric power supply must be connected
to the circuit until it has been suitably repaired.
If the fault cannot be repaired immediately, but the operation must be continued, use a suitable
temporary solution.
This solution must be communicated to the owner of the plant so that all parties can be informed.
The initial safety controls envision:
• draining the condensers: this operation must be performed safely to prevent the possible
formation of sparks;
• no exposure of components and electric wiring to voltages during loading, repair or purification
of the system;
• the continuity of the earth.
l. Repair interventions of the hermetic components
• During the repair of hermetic components, all electric power supply lines must be disconnected
from the appliance running, before the eventual removal of the hermetic covers, etc.
Whenever it is absolutely necessary to have electric power supply for the unit during
maintenance, a constantly active leak detector must be positioned in the most critical point
in order to signal a potentially dangerous situation.
• Particular attention must be paid to the following to guarantee that, in the case of intervention
on electric components, the housing is not altered in a way to affect the level of protection.
EN - 9
NEXYA S5 E
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