Basic safety instructions
Explosion hazards
The unit has been designed and manu-
factured taking the harmonised stand-
ards EN1127-1, EN60079-0 and
EN60079-1 into account. Thus, the unit
is protected against potentially-
explosive atmospheres by a pressure-
resistant flameproof enclosure “d”.
In spite of this, the following points
must be observed:
An explosion hazard arises from
using equipment that is unsuitable
for the environmental conditions.
Before use in an environment in
which there is an explosion hazard,
observe the following points:
The surface temperature of the
equipment must not exceed that
permissible at the location where
it is installed.
If the unit is installed so that it is
electrically isolated, suitable
measures must be adopted to dis-
charge static electricity between
valve connections.
Moving parts that are extremely
resistant to movement, may give rise
to frictional heating. Ensure that
moving parts move freely.
During welding operations, there is a
risk of explosion or fire being caused
by open flames, electric arcs and fly-
ing sparks. Observe the valid legal
regulations concerning protection
against fire and explosions that ap-
ply where the unit is installed.
The unit and its components shall
only be assembled or dismantled by
specialist personnel.
Danger of serious injury
The unit can become hot during
operation. Only take the unit into
service when contact with hot sur-
faces is prevented by insulation or
guards.
During operation the unit is under
the influence of higher ambient tem-
peratures and may be hot. Do not
carry out work on the unit until the
following conditions apply:
The unit has been disconnected
from sources of electrical energy.
The unit has cooled down (to
about 20 °C).
During any work on the unit, the
higher-level plant must be
switched off and secured against
unauthorised switching back on.
For units installed in contaminated
areas, there is a danger of severe or
lethal injury from hazardous sub-
stances on the unit. Do not work on
the unit until it has been completely
decontaminated. Wear the specified
protective clothing during all work in
the contaminated area.
The unit and its components shall
only be assembled or dismantled by
specialist personnel. Specialist per-
sonnel must have knowledge and
experience in the following sectors:
Electrical engineering
The selection of lifting gear suita-
ble for the unit, and the safe use
of such lifting gear
Working with hazardous media
(contaminated, hot, or under pres-
sure)
The selection of unsuitable lifting
gear, or its incorrect use, can result
in the unit or parts of it falling.
Allow only specialist personnel to
lift the unit or its parts.
Make sure that there are never
persons under suspended loads.
Make sure that lifting gear has
adequate load capacity for the
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