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Electrical Installation
General specifications
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 whi ch was sent with the unit.
Should the wiring diagram not appear on the machine or should it have been lost, please contact your dealer who will
provide for a copy to be forwarded.
Use copper conductors only. Use of conductors in any material other than copper could cause overheating or
corrosion at the connection points and damage the unit.
To avoid interference, all control wires must be installed separately from the power cables. 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.
Concurrence of single-phase and three-phase charges and unbalance between phases can cause leakages towards
ground of up to 150 mA during the normal operation of the units of the series.
If the unit includes devices that cause superior harmonics (such as VFD and phase cut), the leakage towards ground
could increase to very high values (about 2 Ampere).
The protections for the power supply system must be designed in accordance with the above mentioned values.
D–EIMWC00508-16EN - 13/48
CAUTION
CAUTION
CAUTION
CAUTION
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