Publicidad
Idiomas disponibles
Idiomas disponibles
1.7. Ventilated work area:
Make sure the area is open or properly ventilated before entering the system or performing hot
work.
Some ventilation must be maintained during the work. Aeration should safely disperse any
released refrigerant and preferably expel it out into the atmosphere.
1.8. Refrigeration equipment checks:
When electrical components are replaced, they must be fit for purpose and to appropriate
specifications. Always follow the manufacturer's guidelines for maintenance and service. If in
doubt, consult the manufacturer's technical department for assistance.
The following controls must be applied to installations using flammable refrigerants: the charge
corresponds to the dimensions of the room in which the rooms containing refrigerant are installed;
machines and air vents are functioning properly and are not blocked; if an indirect refrigeration
circuit is used, the secondary circuit must be checked in order to detect the presence of
refrigerant; the marking affixed to the equipment remains visible and legible. Illegible markings
and signs must be corrected; refrigeration pipes or components are installed in a position where
they are not likely to be exposed to a substance which could corrode components containing
refrigerant,
1.9. Checks of electrical devices:
Repair and maintenance of electrical components should include initial safety checks as well as
component examination procedures. In the event of a fault which could compromise safety, no
power supply should be connected to the circuit until the problem has been satisfactorily resolved.
If the fault cannot be corrected immediately but it is necessary to continue use, an adequate
temporary solution must be used. This problem should be reported to the owner of the equipment
so that all parties are aware.
The initial safety checks should include: discharging the capacitors: this should be done safely in
order to avoid any possibility of sparking; ensure that no live electrical components or wiring are
exposed when charging, recovering or purging the system; the presence of earth continuity.
2. REPAIRS OF SEALED COMPONENTS
2.1. When repairing sealed components, all power supplies should be disconnected from the
equipment being used before any removal of sealed covers, etc. If it is absolutely necessary to
have a power supply to the equipment during repair work, a continuously functional leak detection
technique must be at the most critical point to report any potentially hazardous situation.
2.2. Particular attention should be paid to the following points in order to ensure that the work
carried out on the electrical components does not modify the case in such a way as to impair the
level of protection.
This includes damaged cables, excessive number of connections, terminals not meeting original
specifications, damaged gaskets, improper mounting of cable glands, etc. Make sure that the
device is correctly mounted. Make sure that the gaskets or sealing materials have not degraded
so that they no longer serve to prevent the infiltration of flammable atmospheres. Replacement
parts must conform to the manufacturer's specifications.
REMARK:
The use of a silicone-based sealant may interfere with the effectiveness of some
types of leak detection equipment. Intrinsically safe components do not necessarily have to be
isolated before being worked on.
3. REPAIR OF INTRINSICALLY SAFE COMPONENTS
Do not apply any permanent inductive or capacitive load to the circuit without ensuring that it will
not exceed the allowable voltage and current for the equipment being used. Intrinsically safe
components are the only types that can be worked on when energized in a flammable
atmosphere. The test apparatus must be properly calibrated. Replace components only with parts
specified by the manufacturer.
Any other part may cause refrigerant to ignite in the atmosphere by leaking.
EN-10
Publicidad
