Publicité
Les langues disponibles
Les langues disponibles
of ignition and is suitable for the refrigerant used. Leak
Initial safety checks shall include:
Initial safety checks shall include:
of ignition and is suitable for the refrigerant used. Leak
of ignition and is suitable for the refrigerant used. Leak
of ignition and is suitable for the refrigerant used. Leak
of ignition and is suitable for the refrigerant used. Leak
Electronic leak detectors shall be used to detect
• That capacitors are discharged: this shall be done in
detection equipment shall be set at a percentage of
detection equipment shall be set at a percentage of
detection equipment shall be set at a percentage of
detection equipment shall be set at a percentage of
• That capacitors are discharged: this shall be done in
detection equipment shall be set at a percentage of
flammable refrigerants, but the sensitivity may not be
a safe manner to avoid possibility of sparking;
the LFL of the refrigerant and shall be calibrated to the
a safe manner to avoid possibility of sparking;
the LFL of the refrigerant and shall be calibrated to the
the LFL of the refrigerant and shall be calibrated to the
the LFL of the refrigerant and shall be calibrated to the
the LFL of the refrigerant and shall be calibrated to the
adequate, or may need re-calibration. (Detection
• That there no live electrical components and wiring
• That there no live electrical components and wiring
refrigerant employed and the appropriate percentage
refrigerant employed and the appropriate percentage
refrigerant employed and the appropriate percentage
refrigerant employed and the appropriate percentage
refrigerant employed and the appropriate percentage
equipment shall be calibrated in a refrigerant-free
are exposed while charging, recovering or purging the
of gas (25 % maximum) is confirmed.
are exposed while charging, recovering or purging the
of gas (25 % maximum) is confirmed.
of gas (25 % maximum) is confirmed.
of gas (25 % maximum) is confirmed.
of gas (25 % maximum) is confirmed.
area.) Ensure that the detector is not a potential source
system;
system;
of ignition and is suitable for the refrigerant used. Leak
Leak detection fluids are suitable for use with most
Leak detection fluids are suitable for use with most
Leak detection fluids are suitable for use with most
Leak detection fluids are suitable for use with most
Leak detection fluids are suitable for use with most
• That there is continuity of earth bonding.
detection equipment shall be set at a percentage of
refrigerants but the use of detergents containing
refrigerants but the use of detergents containing
refrigerants but the use of detergents containing
refrigerants but the use of detergents containing
refrigerants but the use of detergents containing
• That there is continuity of earth bonding.
2.Repairs to sealed components
the LFL of the refrigerant and shall be calibrated to the
2.Repairs to sealed components
chlorine shall be avoided as the chlorine may react
chlorine shall be avoided as the chlorine may react
chlorine shall be avoided as the chlorine may react
chlorine shall be avoided as the chlorine may react
chlorine shall be avoided as the chlorine may react
1) During repairs to sealed components, all electrical
refrigerant employed and the appropriate percentage
with the refrigerant and corrode the copper pipe-work.
1) During repairs to sealed components, all electrical
with the refrigerant and corrode the copper pipe-work.
with the refrigerant and corrode the copper pipe-work.
with the refrigerant and corrode the copper pipe-work.
with the refrigerant and corrode the copper pipe-work.
supplies shall be disconnected from the equipment
of gas (25 % maximum) is confirmed.
supplies shall be disconnected from the equipment
If a leak is suspected, all naked flames shall be
If a leak is suspected, all naked flames shall be
If a leak is suspected, all naked flames shall be
If a leak is suspected, all naked flames shall be
If a leak is suspected, all naked flames shall be
being worked upon prior to any removal of sealed
Leak detection fluids are suitable for use with most
removed/ extinguished.
removed/ extinguished.
removed/ extinguished.
removed/ extinguished.
removed/ extinguished.
being worked upon prior to any removal of sealed
covers, etc. If it is absolutely necessary to have an
refrigerants but the use of detergents containing
covers, etc. If it is absolutely necessary to have an
If a leakage of refrigerant is found which requires
If a leakage of refrigerant is found which requires
If a leakage of refrigerant is found which requires
If a leakage of refrigerant is found which requires
If a leakage of refrigerant is found which requires
electrical supply to equipment during servicing, then a
chlorine shall be avoided as the chlorine may react
brazing, all of the refrigerant shall be recovered from
brazing, all of the refrigerant shall be recovered from
brazing, all of the refrigerant shall be recovered from
brazing, all of the refrigerant shall be recovered from
brazing, all of the refrigerant shall be recovered from
electrical supply to equipment during servicing, then a
permanently operating form of leak detection shall be
with the refrigerant and corrode the copper pipe-work.
permanently operating form of leak detection shall be
the system, or isolated (by means of shut off valves) in
the system, or isolated (by means of shut off valves) in
the system, or isolated (by means of shut off valves) in
the system, or isolated (by means of shut off valves) in
the system, or isolated (by means of shut off valves) in
located at the most critical point to warn of a
If a leak is suspected, all naked flames shall be
a part of the system remote from the leak. Oxygen free
a part of the system remote from the leak. Oxygen free
a part of the system remote from the leak. Oxygen free
a part of the system remote from the leak. Oxygen free
a part of the system remote from the leak. Oxygen free
located at the most critical point to warn of a
potentially hazardous situation.
removed/ extinguished.
potentially hazardous situation.
nitrogen (OFN) shall then be purged through the
nitrogen (OFN) shall then be purged through the
nitrogen (OFN) shall then be purged through the
nitrogen (OFN) shall then be purged through the
nitrogen (OFN) shall then be purged through the
2) Particular attention shall be paid to the following to
If a leakage of refrigerant is found which requires
2) Particular attention shall be paid to the following to
system both before and during the brazing process.
system both before and during the brazing process.
system both before and during the brazing process.
system both before and during the brazing process.
system both before and during the brazing process.
7.Removal and evacuation
7.Removal and evacuation
7.Removal and evacuation
7.Removal and evacuation
7.Removal and evacuation
ensure that by working on electrical components, the
ensure that by working on electrical components, the
brazing, all of the refrigerant shall be recovered from
casing is not altered in such a way that the level of
the system, or isolated (by means of shut off valves) in
When breaking into the refrigerant circuit to make
When breaking into the refrigerant circuit to make
When breaking into the refrigerant circuit to make
When breaking into the refrigerant circuit to make
casing is not altered in such a way that the level of
When breaking into the refrigerant circuit to make
a part of the system remote from the leak. Oxygen free
protection is affected. This shall include damage to
repairs – or for any other purpose –conventional
protection is affected. This shall include damage to
repairs – or for any other purpose –conventional
repairs – or for any other purpose –conventional
repairs – or for any other purpose –conventional
repairs – or for any other purpose –conventional
cables, excessive number of connections, terminals not
nitrogen (OFN) shall then be purged through the
cables, excessive number of connections, terminals not
procedures shall be used. However, it is important that
procedures shall be used. However, it is important that
procedures shall be used. However, it is important that
procedures shall be used. However, it is important that
procedures shall be used. However, it is important that
made to original specification, damage to seals,
system both before and during the brazing process.
best practice is followed since flammability is a
made to original specification, damage to seals,
best practice is followed since flammability is a
best practice is followed since flammability is a
best practice is followed since flammability is a
best practice is followed since flammability is a
7.Removal and evacuation
incorrect fitting of glands, etc.
incorrect fitting of glands, etc.
consideration. The following procedure shall be
consideration. The following procedure shall be
consideration. The following procedure shall be
consideration. The following procedure shall be
consideration. The following procedure shall be
Ensure that apparatus is mounted securely.
When breaking into the refrigerant circuit to make
adhered to:
adhered to:
adhered to:
adhered to:
adhered to:
Ensure that apparatus is mounted securely.
Ensure that seals or sealing materials have not
repairs – or for any other purpose –conventional
Ensure that seals or sealing materials have not
• Remove refrigerant;
• Remove refrigerant;
• Remove refrigerant;
• Remove refrigerant;
• Remove refrigerant;
degraded such that they no longer serve the purpose
procedures shall be used. However, it is important that
• Purge the circuit with inert gas;
• Purge the circuit with inert gas;
• Purge the circuit with inert gas;
• Purge the circuit with inert gas;
degraded such that they no longer serve the purpose
• Purge the circuit with inert gas;
of preventing the ingress of flammable atmospheres.
best practice is followed since flammability is a
of preventing the ingress of flammable atmospheres.
• Evacuate;
• Evacuate;
• Evacuate;
• Evacuate;
• Evacuate;
Replacement parts shall be in accordance with the
consideration. The following procedure shall be
• Purge again with inert gas;
• Purge again with inert gas;
• Purge again with inert gas;
• Purge again with inert gas;
• Purge again with inert gas;
Replacement parts shall be in accordance with the
manufacturer's specifications.
adhered to:
manufacturer's specifications.
• Open the circuit by cutting or brazing.
• Open the circuit by cutting or brazing.
• Open the circuit by cutting or brazing.
• Open the circuit by cutting or brazing.
• Open the circuit by cutting or brazing.
NOTE: The use of silicon sealant may inhibit the
• Remove refrigerant;
NOTE: The use of silicon sealant may inhibit the
The refrigerant charge shall be recovered into the
The refrigerant charge shall be recovered into the
The refrigerant charge shall be recovered into the
The refrigerant charge shall be recovered into the
The refrigerant charge shall be recovered into the
effectiveness of some types of leak detection
correct recovery cylinders. The system shall be "flushed"
effectiveness of some types of leak detection
correct recovery cylinders. The system shall be "flushed"
correct recovery cylinders. The system shall be "flushed"
correct recovery cylinders. The system shall be "flushed"
correct recovery cylinders. The system shall be "flushed"
• Purge the circuit with inert gas;
equipment. Intrinsically safe components do not have
with OFN to render the unit safe. This process may
with OFN to render the unit safe. This process may
with OFN to render the unit safe. This process may
with OFN to render the unit safe. This process may
with OFN to render the unit safe. This process may
equipment. Intrinsically safe components do not have
• Evacuate;
to be isolated prior to working on them.
need to be repeated several times. Compressed air or
to be isolated prior to working on them.
need to be repeated several times. Compressed air or
need to be repeated several times. Compressed air or
need to be repeated several times. Compressed air or
need to be repeated several times. Compressed air or
• Purge again with inert gas;
46
Publicité
