Munters EC52D, Manual For Use And Maintenance

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25 | © Munters AB, 2019
fig.28
Motor specifications are written on the label stuck on the frame and motor (no. 1 and 2 in
diagram).
To change the direction of rotation of a three-phase motor it is necessary to change the
connection of two of the phases.
WARNING
In the event of installations that do not comply with the directions given
in this chapter, the manufacturer’s liability ceases, along with the validity of the CE
Declaration of Conformity.
The electrical lines must be laid in accordance with requirements of the laws applying in the
place of installation, and in any event:
•
they must be laid with cables of adequate section for the power of the fan and the
length of the line itself;
•
they must make an effective earth connection;
•
they must have isolating devices and automatic protection against overload and short
circuits.
Before activating the electrical supply to the machine by turning the isolator switch to position
On, a series of checks must be made:
•
check that the voltage and frequency of the power source correspond to those
indicated in the equipment technical data and electrical diagram;
•
check that the supply cables and the conductor providing external protection are
correctly connected;
•
check that the connections in the control and power circuits are properly tight;
•
check that the intensity of the short-circuit expected at the connection terminals is
compatible with the breaking power of the protection switch upstream of the electrical
panel;