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2.1.2 Other important notes
Observe these instructions for explosion-proof
FM
products.
A blue or grey circle with a white graphical symbol
indicates that an action must be taken.
A red or grey circle with a diagonal bar, possibly with
a black graphical symbol, indicates that an action
must not be taken or must be stopped.
If these instructions are not observed, it may result in
malfunction or damage to the equipment.
Tips and advice that make the work easier.
3. Safety instructions
3.1 General safety instructions
DANGER
Electric shock
Death or serious personal injury
- Before starting any work on the product, make
sure that the fuses have been removed or the main
switch has been switched off. Make sure that the
power supply cannot accidentally be switched on.
To reduce the risk of ignition of hazardous
FM
atmospheres, do not open while circuits are live.
Follow these safety instructions as well as the
instructions in each individual section when
transporting, storing, handling and operating the
mixer or flowmaker.
The mixer or flowmaker must be installed,
connected, started up and serviced by qualified
persons.
Beware of rotating parts.
Make sure that persons cannot accidentally fall into
the tank, e.g. by installing a cover or railing.
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3.2 Potentially explosive environments
Use explosion-proof Grundfos mixers in potentially explosive
environments.
The explosion protection classification of the SMD
mixer is Class I, Division 1, Groups C and D, T4. The
FM
classification of the installation must be approved by
the local authorities in each individual case.
3.3 Explosion-proof versions
When using explosion-proof mixers, observe the
following safety regulations.
The motor temperature must always be monitored
via the built-in PTC or PTO (Klixon) sensors. The
FM
associated relay must be certified for this use with
safety level SIL 1. If the relay is built in as part of a
frequency converter, the converter must also fulfil
SIL.
Power cable
The factory-fitted power cable must not be shortened.
Mixers and flowmakers must not be dismantled in an
FM
explosive atmosphere.
Soft starter and frequency converter
Only use soft starters and frequency converters if the FM
classification of these is higher than the one applying to the
mixer, and they are installed in accordance with the FM
regulations.
Accessories
Only use the mixer together with accessories supplied and
approved by Grundfos.
Maintenance, service and repair
Only Grundfos or service workshops approved by Grundfos are
allowed to dismantle mixers. This also applies to the cable entry.
Use only components produced by Grundfos for repair purposes.
For inspection and maintenance, the standard ANSI/IEC 60079-
17 must be considered and met.
Service log
Spare parts must be registered in a service log in order to have
100 % traceability during the product life.
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