Handleiding
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Testing of electrical appliances
Before carrying out any repair or maintenance
work on electrical equipment, safety tests and
inspections of the equipment must be carried out.
If a defect that could jeopardise safety is detected,
the appliance/unit must not be connected to the
power supply until the defect has been rectified. If
the error cannot be rectified immediately
, a suitable
interim solution must be found. This should be
communicated to the owner of the appliance/unit
so that everyone involved is informed.
Initial safety checks should include the following:
n Condensers should be discharged; this should
be done in a safe manner to avoid the possi-
bility of sparking.
n When charging, restoring or purging the
system, no live parts or wiring must be
exposed.
n Continuity of earthing.
Repairs to hermetically sealed components
When repairing hermetically sealed components,
all power to the appliance/unit must be discon-
nected before removing sealed covers, etc. If it is
absolutely necessary to supply power to the appli-
ance/unit during maintenance, a permanent leak
detector should be installed at the most critical
point to provide an early warning of a potentially
dangerous situation.
Particular attention should be paid to the following
point to ensure that the housing is not modified
when working on electrical components in such a
way that the degree of protection is compromised.
This includes damage to wiring, an excessive
number of connections, terminals that do not meet
the original specification, damage to seals,
improper installation of sealing screws, etc. Ensure
that the appliance/unit is securely mounted.
Ensure that seals or sealing materials are not worn
to such an extent that they no longer fulfil their
function of preventing the penetration of an ignit-
able atmosphere. Spare parts must correspond to
the manufacturer
’s specifications.
Repairing of intrinsically safe components
Do not connect a permanent inductive or capaci-
tive load to the circuit without ensuring that the per-
missible voltage and current for the equipment
used are not exceeded. Intrinsically safe compo-
nents are the only ones that may be worked on
while they are connected to the power supply and
an ignitable atmosphere is present. The test instru-
ment must have the correct rated specifications.
Components may only be replaced by parts speci-
fied by the manufacturer
. Other parts can cause
ignition of the refrigerant in the atmosphere due to
leakage.
Wiring
It must be ensured that the wiring is not exposed to
wear, corrosion, excessive pressure, vibrations,
sharp edges or other harmful environmental influ-
ences. The effects of ageing or continuous vibra-
tion from sources such as compressors or fans
shall also be considered in the test.
Identifying combustible refrigerant
When searching for or locating refrigerant leaks,
potential ignition sources must not be used under
any circumstances. A halogen torch (or any other
detector/searching device with an open flame)
must not be used.
NOTICE!
The use of silicones can influence the ef
fective-
ness of leak detection devices! Intrinsically safe
components must not be insulated before
starting work.
Leak detection methods
The following leak detection methods are consid-
ered acceptable for systems containing flammable
refrigerants. Electronic leak detectors should be
used to detect flammable refrigerants, but their
sensitivity may be inadequate or they may need to
be recalibrated. (Leak detectors should be cali-
brated in a refrigerant-free environment.) Ensure
that the leak detector is not a potential ignition
source and that it is suitable for the refrigerant
used.
Leak detectors should be set at a percentage of
the lower explosive limit and calibrated for the
refrigerant used, and the appropriate gas propor-
tion (maximum 25 %) should be confirmed.
Leak detection fluids are suitable for most refriger-
ants, but the use of cleaning agents containing
chlorine should be avoided, as chlorine can react
with the refrigerant and corrode the copper pipes.
If a leak is suspected, all naked flames must be
removed/extinguished. If a refrigerant leak
requiring soldering is detected, all refrigerant must
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Productinformatie
| Merk | REMKO |
| Model | RKL 355 Eco |
| Categorie | Airco |
| Taal | Nederlands |
| Grootte | 4089 MB |
