• All electrical connections to the machine must be carried out in compliance with
laws and regulations in force.
• All installation, operating and maintenance activities must be carried out by
qualified personnel.
• Please refer to the specific wiring diagram for the machine that you have
purchased, and which was sent with the unit.
• Should the wiring diagram not come with the machine, please contact your dealer
for further action.
• Use copper conductors only. Failure to use copper conductors could cause
overheating or corrosion at the connection points and damages the unit.
• To avoid interference, all control wires must be installed separately from the
power wires. Use separate electrical conduits for this purpose.
• Before servicing the machine in any way, open the general disconnecting switch
on the machine's main power supply.
• When the machine is off, but the disconnector switch is in the closed position,
unused circuits are live as well.
• Never open the terminal board box of the compressors before having opened the
unit's general disconnecting switch.
• In installations with power supply lines longer than 50 meters, inductive coupling
between phases and between phase and earth generates significant
electromagnetic field.
• In order to limit these phenomena, it is good practice to lay out the phase wires
symmetrically, as described in the figure:
• Chiller unit compressors are single-direction rotation compressors and can be damaged if
rotated in the wrong direction. For this reason, proper phasing of electrical power is
important. Terminal block indicator (R, S, T). R=L1, S=L2, T=L3
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