Zodiac Z350iQ Manual De Instalación Y De Uso página 24

3.2.1 Safety instructions concerning appliances containing R32 refrigerant
Area check
• Prior to beginning work on systems containing flammable refrigerants, safety checks are necessary to ensure that the
risk of ignition is minimised.
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.
General work area
• AIl 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.
Check for the 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 toxic or flammable atmospheres. Ensure that the leak detection equipment being used is
suitable for use with all applicable refrigerants, i.e. non-sparking, adequately sealed or intrinsically safe.
Check for the presence of a fire extinguisher
• If any work involving heat is to be conducted on the refrigerating equipment or any associated parts, appropriate
fire extinguishing equipment shall be available to hand. Have a dry powder or CO
charging area.
No source of ignition
• No person carrying out work in relation to a refrigerating system which involves exposing any pipe work 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 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.
Area ventilation
• Prior to penetrating the unit in any way to perform any required service, ensure that the area is open and adequately
ventilated. Proper ventilation, to allow for safe dispersion of any refrigerant which may be inadvertently released to
the atmosphere, should be maintained while service is being performed on the unit.
Refrigeration equipment check
• The manufacturer's service and maintenance guidelines must be followed at all times. When replacing any electrical
components, be sure to use only components which are of the same type and rating and which are recommended/
approved by the manufacturer. If in doubt, consult the manufacturer's technical department for assistance.
• The following checks shall be applied to installations using flammable refrigerants:
- 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 suitably protected against being so corroded.
Electrical component check
• 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 no live electrical components and wiring are exposed while charging, recovering or purging the system;
- that there is continuity of earth bonding.
Repair of insulated 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 the apparatus is mounted securely.
• Ensure that seals or sealing materials have not degraded to the point 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.
Repair of 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
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, fire extinguisher adjacent to the
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