Potential causes of damage
and malfunction
Failure to follow the wiring diagram
or making incorrect connections at
the terminals can result in destruc-
tion of the PCB or individual electri-
cal components.
The unit may only be installed on
valves whose torque requirement
does not exceed the unit’s maximum
permissible output torque. Failure to
follow this rule can result in break-
age of the operating shaft or other
components of the unit.
Connection to a power supply of the
wrong voltage can cause damage to
the unit’s electrical components.
Make sure the unit is always con-
nected to the correct voltage.
Qualification of personnel
The operating authority shall only au-
thorise qualified specialist personnel to
carry out work on the unit. This work is
limited to:
Changing the limit switch plate
Setting the end-position limit
switches
Changing the timing belt
Persons who work on the unit must, as
a result of their training and experience,
have sufficient knowledge of the rele-
vant regulations, that apply at the loca-
tion where the unit is installed, to en-
sure safe operation/maintenance of the
unit.
These include, in particular, the follow-
ing regulations:
Legal requirements
Standards
Accident-prevention regulations
Recognised rules for safety and
correct working
Special instructions issued by the
operating authority
These persons must be able to recog-
nise, assess and avoid potential haz-
ards.
Specialist personnel must have
knowledge and experience in the fol-
lowing sectors:
Valid legal regulations concerning
protection against fire and explo-
sions, and work safety that apply
where the unit is installed
Working on pressurised equipment
Work on electrical equipment
Working with hazardous media (hot,
or under pressure)
Lifting and transporting loads
All Instructions in these Operating
Instructions and other co-valid doc-
uments
All other types of work are only to be
carried out by the manufacturer or by
personnel authorised to do so by the
manufacturer.
Protective clothing
The protective clothing required de-
pends on the legal requirements where
the unit operates and on the media
being handled. For more information
about suitable protective clothing and
protective equipment, see the safety
data sheet for the medium being han-
dled.
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