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Single-phase
POWER SUPPLY
4.5.3
Electrical panel
The electric power panel is located inside the structure of the condenser; to access it, the side panel must be removed.
The electric power panel is suitable for outdoor installation and complies with EN60204-1 standards.
The electric power panel includes:
•
Degree of protection IP44 - degree of protection of the electric power panel inserted in the machine structure and not
referring only to the panel.
•
General isolating switch with door safety lock.
•
Terminal board for electrical connections:
o
power supply - the power supply is independent of the internal unit.
o
0-10Vdc signal for fan rotation speed control - to be connected to the internal unit.
o
alarm signal of the fans and, if present, of the FMC electronic board - to be connected to the internal unit.
VERSION WITH AC ELECTRIC MOTORS - MEGR-A series
FMC electronic board for fan rotation speed control. In case of power failure and malfunction, the board sends a digital alarm signal
to the internal unit (refer to the wiring diagrams).
The system for regulating the supply voltage of the fans is managed by the FMC electronic board.
VERSION WITH EC ELECTRIC MOTORS - MEGR-E series
Direct control of the fan rotation speed by 0-10 Vdc signal.
Models with 4/6 fans:
There are two electric power panels, each with the above equipment. The panels are already interconnected, but only one of them
performs the main panel action. The power supply and the control and alarm signals must be connected in this panel.
4.5.4
Auxiliary electrical connections with the internal unit
The auxiliary connections can be found in the terminal board contained in the electrical panel of the main machine. Connections to
be completed by the installer:
o
0-10Vdc signal for condensation control;
o
Fan thermal alarm;
For the connection of the auxiliaries use shielded cable 4 x 0.75 mm2 with a maximum length of 120 m.
Installation, use and maintenance manual
Three-phase
31
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