Munters EM Serie Manual De Uso Y Mantenimiento página 9

the electrical panel;
• check that the protection
magnetothermic switches) are correctly sized;
• check 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.
Equipotential protection circuit
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 mm²: section of the
protection conductor equal to the section of the
supply conductor;
• phase conductor between 16 and 35 mm²: section
of protection conductor equal to 16 mm²;
• phase conductor over 35 mm²: section of protection
conductor equal to at least half the section of the
supply conductor.
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.
In particular, perform the following operations.
Equipotential protection circuit:
devices (fuses, • check the fan visually, verifying that there are no
particular mechanical irregularities or foreign bodies
inside the structure;
• check that the protective structures (fixed guards
made of metal mesh) are correctly positioned and
fixed;
• check that the emergency stop function actuator
operates correctly.
!
devices.
Checking the electrical system:
• check that the supply conductors are properly fixed
to the terminals of the isolating switch;
• check the connections of the conductors in the
equipotential circuit;
• check that the guards inside the electrical panel are
correctly positioned and fixed;
• check that the safety devices are receiving power
and are active, and check their effectiveness.
After this series of checks has been carried out, the fan is
ready for its first startup.
!
not use water for motor cleaning. Use compressed
air only. Water spraying will cause rust inside the
bearings and lead to their failure.
!
treatment (equivalent of 14μm on each side) which
corresponds to a corrosion resistance in salty mist
of 140h. Whenever it is intended to use the fans
in ambients characterized by the presence of
particularily agressive agents (ammonia, clavolanic
acid, etc.) the user, before installing the fan at the
installation site must verify that the environmental
conditions are compatible with the intended use of
the materials that compose the fan.
© Munters AB, 2013
Tension the belt after three days of
operation: improper tension will lead
to premature wear on the transmission
Keep motor body clean. Dust deposit on
motor body will lead to overheating and
failure of bearings and motor itself. Do
The metal sheet used for constructing the
fan housing and shutter blades have a
minimum Z200 galvanization surface
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