page 17 of 91 USB-QFLCII-14804/0
3.2 Warning notices on the inlet isolation device
Warning labels on the inlet isolation device give notice of immediate hazards.
They have the following meaning:
Warning notice Meaning:
Do not open the inspection
lid during operation or when
there is an explosion risk.
Do not open during
operation/pay
attention
to flow direction
The inlet isolation device
must be installed in the same
flow
direction as illustrated
by the arrow.
Potential equalization
Labeling of the central connection point for the
equipotential bonding provided by the
customer.
3.3 Inspections
Inspection by a
qualified person Depending on national, state and local laws, regulations, guidelines and standards,
the installation location, conditions, and grounding may have to be checked by
qualified personnel at commissioning and regularly thereafter.
Inspection prior to com
missioning by a quali
Systems in explosive environments must be checked by a qualified person prior to first
fied person commissioning according to the Ordinance on Industrial Safety and Health
(BetrSichV) and Technical Rules for Operational Safety TRBS 1203 on their orderly
condition concerning assembly, installation and safe function.
Continuous inspection
by qualified persons
Inspection has to be repeated by a qualified person every three years after significant
modification.
Inspection according to
TRBS 2153
Potential equalization has to be checked according to TRBS 2153 in regular intervals
Measurements concern-
ing air ventilation
Required regular measurements concerning air ventilation must be carried out by
qualified persons with the necessary knowledge.
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