Munters EC52, Руководство по эксплуатации и техническому обслуживанию

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•
check that the protection devices (fuses, magnetothermic switches) are correctly
sized, and that the phases are connected in the correct order: check that the fan
rotates in the direction of the arrow shown on the driven pulley (see fig.30).
fig.30
Equipotential earthing wiring safeguard
To create effective protection against the risk of electrocution, the outer protection conductor
must be connected to terminal PE inside an electrical panel.
For correct sizing of the protection conductors, see following requirements as indicated in
standard IEC EN 60204-1:
•
phase conductor up to 16 mm
2
: section of the protection conductor equal to the
section of the supply conductor;
•
phase conductor between 16 and 35 mm
2
: section of protection conductor equal to
16 mm
2
;
•
phase conductor over 35 mm
2
: section of protection conductor equal to at least half
the section of the supply conductor.
WARNING
When connecting all the metal masses to the earth system, check that
there are no insulating elements between the various conductive masses (metal
parts). The system must not be put into operation unless the equipotentiality of the
masses and the connection to the earth system have previously been checked.
Protection against contact voltages
The choice of device to protect the electrical system must be made in such a way as to ensure
the safe intervention of the main automatic switches and any differential devices linked to
them. For an appropriate choice of the type of protection for the machine’s supply line, taking
into account whether the distribution system is TT or TN, it is advisable to consult an electrical
systems designer, in order to ensure compliance with the requirements of standard IEC 64-8
or the equivalent provisions in the country where the machine is being installed.
5.5 Tests and checks before startup
Before startup, it is extremely important to carry out a very careful check of the fan, in order
to prevent malfunctions and/or accidents.