About this document
Prothermo NMT539
4
Hauser
1
About this document
1.1
Document function
These Operating Instructions contain all the information that is required during various
phases of the life cycle of the device: from product identification, incoming acceptance and
storage, to mounting, connection, operation and commissioning through to
troubleshooting, maintenance and disposal.
1.2
Symbol
1.2.1
Safety symbols
Symbol
Meaning
DANGER
DANGER!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will
result in serious or fatal injury, as well as a risk of fire or explosion.
WARNING
WARNING!
This symbol alerts you to a dangerous situation. Failure to avoid this situation will
result in a risk of serious or fatal injury, fire or explosion.
CAUTION
Note
This symbol alerts you to a dangerous situation. Failure to avoid this situation will
result in a risk of minor or moderate injury and damages to properties.
NOTICE
NOTE!
This symbol contains information on procedures and other facts that do not result in
personal injury.
1.2.2
Electrical symbols
Symbol
Meaning
Direct current
Alternating current
Direct current and alternating current
Ground connection
A grounded terminal that, as far as the operator is concerned, is grounded via a
grounding system.
Protective ground connection
A terminal that must be connected to the ground prior to establishing any other
connections.
Equipotential connection
This connects with the grounding system at the plant. It includes equipotential line
and single point ground systems, depending on the norms of each country or
company.