Blue Box - 46
Electrical connections must be made in accordance with the information given on the electrical drawing attached
to the unit and in compliance with the applicable local regulations.
An Earth (ground) connection is compulsory. The installer must connect the earth cable with a dedicated terminal
on the earth bar in the electrical board (refer to the illustration on the following page) labelled PE.
It must be verified that the electrical supply corresponds to the unit electrical nominal data (tension, phases,
frequency) indicated on the label on the front panel of the unit.
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 these tolerances are not possible contact Blue Box to provide the
necessary devices.
Check that the line is connected with the correct phase sequence.
Cable power inlet into the electric panel:
- Models from 3.2 to 13.2, from the left side of electric panel.
- Models from 14.4 to 26.4, from the top of electric panel
The control circuit is derived from the power supply through a transformer located inside the electrical panel.
The control circuit is protected by fuses.
4.16 ELECTRICAL CONNECTIONS
4.16.1 General
Before any operation on the electrical section, be sure that the electric
supply is disconnected.
Power cable and line protection must be sized according to the specification
indicated on the wiring diagram and the documents supplied with the
unit.
The electrical supply must be within the limits shown. If this is not the
case the warranty will be terminated immediately.
Electrical cable anchorage: anchor the electrical power cables with fixing
systems able to withstand pulling and torsional stress.
The crankcase heaters must be connected at least 12 hours before starting
the unit; the heaters are automatically connected when the main
disconnect switch is set to the ON position.
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