J. D. NEUHAUS Profi 025Ti, Руководство по эксплуатации

Страница: 153 / 218

friction, impact or sliding points. It is thus possible to
exclude sparking due to mechanical influences with
these material combinations.
The external housing of the service units is made of
aluminium. Therefore the installation position is to be
selected so as to ensure that there is no risk from
impact sparks.
E A R T H I N G
Electrostatic ignition hazards can be prevented by
means of safe earthing. In zones 1 and 21, earthing of
the hoists is required. This must be achieved via the
load hook or the load eyes, if the lifting equipment is
connected to correspondingly earthed parts (earth
leakage resistance less than 10
6
). This also applies to
operation with trolleys or cranes. Their tracks must be
earthed on site. Running wheels and rail surfaces must
never be painted, as this can result in unacceptably
high earth leakage resistance values.
Earthing of the load hook is via the chain (see also
Load chain , page 10).
Loads must be earthed during transportation.
A separate earth is required, for example, when
using non-conducting sling gear.
C L E A N I N G P L A S T I C S U R FAC E S
Where JDN Air Hoists or JDN Air Winches feature plastic
parts, these surfaces must only be cleaned using a damp
cloth (cleaning cloth with water). This reduces
electrostatic charging that can arise due to mechanical
friction at the plastic surface.
DA N G E R !
Electrostatic charging may occur at the
plastic surfaces, potentially leading to
electrostatic discharge that can ignite
gases and air mixtures.
AC E T Y L E N E A N D C OP P E R
When operating JDN products in explosion-hazardous
areas, in which an acetylene-containing atmosphere can
occur, it must be ensured that copper-plated parts are
kept dry, in order to exclude the possibility of oxidation
of the metallic copper and the formation of a aqueous
phase, which is capable of reacting with acetylene and
which can result in an explosion hazard.
powered by air !
P R O D U C T I N F O R M AT I O N
Page 11