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Idiomas disponibles
Idiomas disponibles
Safety Information (continued)
Precautions for using R32 refrigerant
The basic installation work procedures are the same as the
conventional refrigerant (R22 or R410A).However, pay attention to
the following :
1. Transport of equipment containing flammable refrigerants
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Compliance with the transport regulations.
2. Marking of equipment using signs
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Compliance with local regulations.
3. Disposal of equipment using flammable refrigerants
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Compliance with national regulations.
4. Storage of equipment/appliances
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The storage of equipment should be in accordance with the
's instructions.
manufacturer
5. Storage of packed (unsold) equipment
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Storage package protection should be constructed such that
mechanical damage to the equipment inside the package will
not cause a leak of the refrigerant charge.
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The maximum number of pieces of equipment permitted to be
stored together will be determined by local regulations.
6. Information on servicing
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Checks to the area: Prior to beginning work on systems
containing flammable refrigerants, safety checks are necessary
to ensure that the risk of ignition is minimised. For repair to the
refrigerating system, the following precautions shall be
complied with prior to conducting work on the system.
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Work procedure: Work shall be undertaken under a controlled
procedure so as to minimise the risk of flammable gas or
vapour being present while the work is being performed.
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General work area: All 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. The area
around the workspace shall be sectioned off. Ensure that the
conditions within the area have been made safe by control of
flammable material.
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Checking for 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 flammable
atmospheres. Ensure that the leak detection equipment being
used is suitable for use with flammable refrigerants, i.e. non-
sparking, adequately sealed or intrinsically safe.
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Presence of fire extinguisher: If any hot work is to be conducted
on the refrigeration equipment or any associated parts,
appropriate fire extinguishing equipment shall be available to
hand. Have a dry powder or CO2 fire extinguisher adjacent to
the charging area.
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No ignition sources: No person carrying out work in relation to
a refrigeration system which involves exposing any pipe work
that contains or has contained flammable refrigerant 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 flammable 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.
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Ventilated area: Ensure that the area is in the open or that it is
adequately ventilated before breaking into the system or
conducting any hot work. A degree of ventilation shall continue
during the period that the work is carried out. The ventilation
should safely disperse any released refrigerant and preferably
expel it externally into the atmosphere.
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Checks to the refrigeration equipment: Where electrical
components are being changed, they shall be fit for the purpose
and to the correct specification. At all times the manufacturer's
maintenance and service guidelines shall be followed. If in doubt
consult the manufacturer's technical department for assistance.
The following checks shall be applied to installations using
flammable refrigerants: The charge size 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; Refrigeration 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.
Checks to electrical devices: 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 there no live electrical components
and wiring are exposed while charging, recovering or purging the
system; That there is continuity of earth bonding.
7. Repairs to sealed components
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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.
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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.
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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.
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This shall include damage to cables, excessive number of
connections,terminals not made to original specification,
damage to seals,
incorrect fitting of glands, etc.
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Ensure that apparatus is mounted securely.
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Ensure that seals or sealing materials have not degraded such
that they no longer serve the purpose of preventing the ingress
of flammable atmospheres.
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