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IM2021
32
– 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.
8.
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:
-those 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
9. Maintenance of sealed components
It is important to ensure that all power sources are disconnected from the operating equipment
during the maintenance of sealed components, before removing the sealing covers, etc.
In case of necessity to provide power to the equipment during maintenance, it is important to
provide a permanent leak detection system at the most critical point in order to warn of a
potentially dangerous situation.
Pay particular attention to ensure the impossibility to change/damage/deform the housing when
working with electrical components in such a way as to affect the protection level, namely:
damage to cables, excessive number of connections, non-compliance of terminals with the
original specification, damage to seals, improper installation of oil seals, etc.
Make sure that the device is installed in a secure manner.
Make sure that the seals or sealing materials are not worn to such an extent that they no longer
prevent the passage of flammable substances. Spare parts shall comply with the manufacturer's
specifications.
NOTE:
The use of silicone sealant can reduce the effectiveness of some types of leak detection
equipment. Intrinsically safe components do not have to be isolated before working on them.
10. Maintenance of intrinsically safe components
Before applying permanent inductive or capacitive loads to the circuit, ensure that they do not
exceed the permissible voltage and current allowed for the equipment.
Structurally intrinsically safe components shall be the only type of equipment that can be
operated under voltage in case of a flammable atmosphere. The test equipment shall be of the
appropriate class.
The components shall only be replaced with the parts specified by the manufacturer. Other parts
may ignite the cooling agent in the atmosphere due to its leakage.
11. Wiring
Make sure the cables are not exposed to wear, corrosion, overpressure, vibration, damage due
to contact with sharp edges, or any other adverse environmental effects. Take into account also
the effects of wear from physical obsolescence or constant vibration from such sources as
compressors or air fans.
12. Flammable cooling agents leak detection
Do not use appliances that can be a potential source of ignition when searching for or detecting
cooling agent leaks under any circumstances. The use of halogen leak detectors (or any other
means of open flame detection) is prohibited.
13. Leak detection methods
The following leak detection methods shall be considered as acceptable for systems containing
highly flammable cooling agents.
In order to detect flammable cooling agents, use electronic leak detectors, however, the
sensitivity may be insufficient or recalibration may be required (the detection equipment shall be
Summary of Contents for H-DH16-P82WF
Page 1: ...INSTRUCTION MANUAL ELECTRIC DEHUMIDIFIER H DH16 P82WF...
Page 2: ...IM2021 2 1 2 1 R290 2 3 4 5 6 7 8 8...
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