Handleiding
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10
Safety Precautions
3.
Sealed electrical components
•
Sealed electrical components shall not be
repaired.
4. Cabling
•
Check that cabling will not be subject
to wear, corrosion, excessive pressure,
vibration, sharp edges or any other adverse
environmental eff ects.
•
The check shall also take into account the
eff ects of aging or continual vibration from
sources such as compressors or fans.
5. Detection of fl ammable refrigerants
•
Under no circumstances shall potential
sources of ignition be used in the searching
or detection of refrigerant leaks.
•
A halide torch (or any other detector using a
naked fl ame) shall not be used.
6. The following leak detection methods
are deemed acceptable for all refrigerant
systems
•
No leaks shall be detected using detection
equipment with sensitivity to detect leakage of
5g/year of refrigerant or better under a pressure
of at least 0.25 times the maximum allowable
pressure, for example, a universal sniff er.
•
Electronic leak detectors may be used to detect
fl ammable refrigerants, but the sensitivity can
be inadequate, or can need re-calibration.
(Detection equipment shall be calibrated in a
refrigerant-free area.)
•
Ensure that the detector is not a potential
source of ignition and is suitable for the
refrigerant used.
•
Leak detection equipment shall be set at a
percentage of the LFL of the refrigerant and
shall be calibrated to the refrigerant employed
and the appropriate percentage of gas (25 %
maximum) is confi rmed.
•
Leak detection fluids are also suitable for use
with most refrigerants, for example, bubble
method and fluorescent agent method. The
use of detergents containing chlorine shall
be avoided as the chlorine can react with the
refrigerant and corrode the copper pipe-work.
•
If a leak is suspected, all naked fl ames shall be
removed/extinguished.
•
If a leakage of refrigerant is found which
requires brazing, all of the refrigerant shall
be recovered from the system, or isolated (by
means of shut off valves) in a part of the system
remote from the leak. The precautions in #7
must be followed to remove the refrigerant.
7. Refrigerant removal and circuit
evacuation
•
When breaking into the refrigerant
circuit to make repairs – or for any other
purpose – conventional procedures shall
be used. However, it is important that best
practice is followed since fl ammability is a
consideration. The following procedure shall
be adhered to:
Safely remove refrigerant following local and
national regulations -> evacuate -> purge
the circuit with inert gas -> evacuate ->
continuously fl ush with inert gas when using
fl ame to open circuit -> open the circuit.
•
The refrigerant charge shall be recovered
into the correct recovery cylinders.
•
The system shall be purged with OFN to
render the appliance safe.
•
This process may need to be repeated
several times.
•
Compressed air or oxygen shall not be used
for this task.
•
Purging of the refrigerant circuit shall be
achieved by breaking the vacuum in the
system with OFN and continuing to fill until
the working pressure is achieved, then
venting to atmosphere, and finally pulling
down to a vacuum.
•
This process shall be repeated until no
refrigerant is within the system.
•
The system shall be vented down to
atmospheric pressure to enable work to take
place.
•
Ensure that the outlet of the vacuum pump
is not close to any potential ignition sources
and there is ventilation available.
OFN = oxygen free nitrogen, type of inert gas.
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Productinformatie
| Merk | Panasonic |
| Model | CU-Z71CKE |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 2583 MB |
