INVENTOR CLCO290-09 Manual De Usuario página 7

|Warnings (for using R290/R32 refrigerant only)
The repair and the maintenance to the electrical
components must include safety checks and also
component inspection procedures. If there is any
fault, that may compromise the safety of the
work applied, then no electrical supply should be
connected to the circuit until it is corrected. If the
fault cannot be corrected immediately but it is
necessary to continue operation, a temporary
solution may be applied, such as the reporting to
the owner of the equipment, so all parties are
informed.
Initial safety checks shall include:
Capacitors are discharged, in a safe manner to
avoid any possible sparking. No active
electrical components and wirings are exposed
while charging, recovering or purging the
system. That it is properly
7. Repairs to sealed components
1) During any performed repairs to sealed
components, all electrical supplies must be
disconnected from the equipment prior to this
act. If it is necessary to have an electrical supply
to the equipment during its servicing, then a leak
detector should be applied as to warn if there are
any signs of potential hazards present.
2) There should be particular attention to
the following as to ensure, that by working on
electrical components there is no alteration to
the casing in such a way that the level of
protection is affected. This includes damage to
the cables, excessive number of connections,
terminals not designed to original
specifications, any damage to seals, the
incorrect fitting of glands, etc.
Ensure the unit is mounted securely.
Ensure that the seals or any sealing materials
have not degraded in such a manner as
to no longer serve its purpose, preventing
flammable gases entering the atmosphere. Any
replacement parts should be in accordance as
per the manufacturer's specifications.
NOTE: The use of silicon sealant may affect
the efficiency of some types of leak detection
equipment. Safe components do not have to
be isolated prior to working.
8. Repair to 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, allowed for the equipment in use.
Intrinsically safe components
EN
grounded.
are the only type that can be worked on,
while live in the presence of flammable
atmosphere. The test apparatus should be at
the correct rating. Any replacement of parts
should be as specified by the Manufacturer,
as other parts may result in an ignition of
refrigerant gas from a possible leak.
9.Cabling
Please check that cables are not subject to
wear, corrosion, excessive pressure, vibration,
or any other adverse environmental effects.
Aging or continual vibration, should also be
taken into account.
10. Detection of flammable refrigerants
Under no circumstance may a potential
ignition source, such as a halide torch or any
detector with the use of a flame, may be used.
11. Leak detection methods
The following leak detection methods are
acceptable for systems containing
flammable refrigerants.
Electronic leak detectors may be used to
detect flammable refrigerants. However, the
sensitivity may not be adequate, or it is
possible it may need re-calibration.
(Detection equipment should be calibrated in a
refrigerant-free area) It should be ensured that
the detector is not a possible ignition source
and is suitable for the refrigerant used. Leak
detection equipment should be set at a
percentage of the LFL of the refrigerant used.
Leak detection equipment should be set at
a percentage of the LFL of the refrigerant and
should be calibrated to the refrigerant employed
and the appropriate percentage of gas (25%
maximum) is confirmed. Leak detection fluids
are suitable for use with most refrigerants but
the use of detergents containing chlorine must
be avoided as the chlorine may react with the
refrigerant and corrode the copper pipe-work. If
a leak is suspected, all flames must be
extinguished. If a leakage of refrigerant is
spotted which requires brazing, all of the
refrigerant shall be recovered from the system,
or isolated (by means of shutting off the valves)
in a part of the system away from the leak.
Oxygen free nitrogen (OFN) should then be
purged through the system both before and
during the brazing process. 12. Removal and
evacuation
When interfering with the refrigerant circuit
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