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6. Maintenance
Explosion-proof light fittings need regular maintenance according to the national rules of the country
they are installed. Especially components which are important for the Explosion Category have to be
carefully checked. Therefore it must to be checked very carefully:
diffuser, housing and gaskets for any kind of damages
the correct installation and tightness of explosion-proof cable glands and explosion-proof locking
screws (Torques see Chapter 3, Technical Data).
all parts of plastic inside the light fitting to attend to colour change, deformation and damaging.
the tight fit of the conductor and the condition of the cable insulation.
that the light fitting is closed correctly and the gasket is effective.
The maintenance of the fitting has to be done following the actual international and national
regulations.
6.1 Cleaning the light fitting
Danger of ignition due to electrostatic charging at the plastic parts of the light fitting!
!
Only clean the inside of the glass and case of the light fitting (as well as its plastic parts)
with a damp cloth. For this only use cold or lukewarm water (if necessary with a mild
cleaning agent) together with a viscose sponge or a soft fibrous-free cloth!
Pay attention to the following in case of application of this light fitting in dusty atmospheres:
Dust deposits have got thermal insulation characteristic features. It is necessary to clean the fitting from
dust regularly. In case the dust layer may be higher than 5 mm it must be ensured that the surface
temperature of the light fitting does not exceed the maximum permissible surface temperature of the
specific dust considering the thickness of the dust layer. The dust layer must not exceed 50 mm at any
time.
6.2 Repair- and maintenance works
Before opening the light fitting it must be diconnected from the mains supply
completely and the battery must be disonnected by the plug connection in the battery
!
box!
For applications in dusty atmospheres the light fitting must be cleaned before opening!
Ensure that no dust can get into the light fitting when it is open!
Replace damaged explosion-proof parts by original spare parts from the Adolf Schuch
GmbH only!
6.3 How to replace the emergency battery
Only original batteries as per the type plate on the battery must be used for replacing
the battery (see Chapter 3, Technical Data)!
!
Loosen the locking screws of the battery box.
The emergency battery is located in the lid of the battery box. Take care when opening it.
Press down the catch on the plug connection and pull the connector of the battery cable out of the
socket.
Insert the protective cap hanging on the connector of the battery cable into the battery connector.
Loosen but do not fully unscrew the locking screws of the battery fixing bracket.
Slide the fixing bracket in the keyhole towards the hinge until the battery is released.
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