Artidor AR-077 Series Podręcznik użytkownika - Strona 13
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Drukuj stronęlocked against unintentional opening and may only be opened under non-hazardous safe conditions. To do
this follow the instructions as described under the heading 'Repair'.
Connection compartment with terminals (Ex de version)
The compartment that contains the connection terminals is accessible to the user by unscrewing the three
cover screws. Opening is only permitted when the power supply has been switched off and the area is
known to be non-hazardous.
11.
Maintenance
For maintenance of the AR-077 signal lights the requirements as stated in EN 60079-17 apply. If the signal
light and the connection cable are no longer in good condition or are very dirty or damaged they must be
immediately repaired or cleaned.
The power supply to the signal lights must be switched off and may only be restored after the maintenance
has been carried out and approved.
The advised maintenance cycle for these signal lights depends on their specific use and must therefore be
agreed with the user for the expected use.
12.
Repair
Repair of the AR-077 signal lights may only be executed by applying original parts and may only be carried
out by qualified workers who have been trained in accordance with EN 60079-19. Applying of non-original
parts may lead to injury to persons and damage to the equipment.
If non-original parts are used or if repairs are carried out in an incompetent manner, the explosion-safety of
the signal light can no longer be guaranteed. Therefore it is preferred that the signal light is returned to the
manufacturer for repair.
If the housing is opened care must be taken of the following (also refer to the next drawing):
The housing may not be opened unless the area is known to be non-hazardous.
The armature must be disassembled in a logical sequence.
The Ex d cover (foot) of the flameproof Ex d compartment is secured by a special locking screw
mounted in the flange of the cover. The Ex d cover is directly mounted to the Ex d housing. The locking
is arranged by using a cup point screw with internal 2 mm hexagon provision. Its function is twofold;
primary preventing unwanted opening of the housing and secondary establishing a bonding mass
connection between housing body and foot.
The locking screw is inserted through the foot (Ex d cover) which is screwed directly into the housing.
The locking screw is a notching screw with a hexagon socket with 2 mm between the flats.
User manual explosion-safe AR-077 signal light
Issue April 2020
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