FD
10
3.2 ELECTRICAL CONNECTIONS
3.2.1 Generality
Before every operation on the electric section, be sure that the electric supply is disconnected.
Main supply must be protected with a differential switch
Close to the unit a main switch must be present.
It must be verified that electric supply is corresponding to the unit electric nominal data (tension, phases,
frequency) reported on the label in the front panel of the unit.
Power connections must be made using a three-wire cable + neutral wire + ground cable.
Power cable and line protection must be sized according norm and laws according with
absorbed current of the machine (see technical data).
The line voltage fluctuations must not be more than ±5% of the nominal value, while the voltage unbalance
between one phase and another must not exceed 2%. If those tolerances should not be respected, please
contact our Firm to provide proper devices.
Electric supply must be in the limits shown: in the opposite case warranty will terminate
immediately.
Electrical connections therefore must be always done according to the instructions reported on
the wiring diagram enclosed with the unit and norms and laws.
Ground connection is compulsory. Installer must connect ground cable with a dedicated terminal on the
apposite terminal block.
3.2.2 Main supply connection
The Electric Power Supply Connection must be carried out according to the indications given in the Electric
Diagram, by connecting the cable supplied with the machine and according with safety norm.
Models FD360 must be electrically powered with 3 phase-neutral-earths.
The compressor has only one allowable rotation direction; therefore, the machine has a control device for
the phases sequence; in case that it may show a wrong sequence, the device inform you with a blinking light;
in this case two phases must be interchanged.
Pay much attention to above indications because the compressor will be damaged if the rotation direction is
not correct.