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3 INSTALLATION
Install the chopper with the base-plate on a flat metallic surface that is clean and
unpainted. Apply a light layer of thermo-conductive grease between the two surfaces to
permit better heat dissipation.
Despite the protection provided against external agents, the continuous attack of corro-
sive substances may cause the connector contacts to oxidise, thus jeopardising good
functioning. Keep this in mind when choosing the installation position on the vehicle.
Use the special holes on the base-plate for fastening the chopper.
Make sure that the wiring of the cable terminals and connectors is carried out correctly.
Fit anti-jamming filters on the horn, solenoid valves, and contactors not connected to
the chopper such as those for activating the pump motor or hydrodrive motor, if the
latter is not handled by the chopper itself.
3.1 CONNECTION CABLES
For the auxiliary circuits, use cables of 0.5mm² section.
For power connections to the motor and to the battery, use cables having sections of
35 - 50mm².
For the best chopper performance, the cables to the battery should be run side by side
and be as short as possible.
3.2 CONTACTORS
Choose the type of contactors on the basis of the maximum operating current of the
motor and the specific chopper configuration.
- The current absorbed by the coil must not be greater than 3 amp.
- The coil suppressors are inside the chopper; do not use contactors with arc suppres-
sors.
- For contactors with magnetic suppressors, make sure you respect the polarity indi-
cated on the cap.
3.3 FUSES
- Use a 10 amp fuse for auxiliary circuit protection.
- For protecting the power unit, see the diagrams.
The value shown is the maximum allowable. For special applications or requirements
this value can be reduced.
For safety reasons, we recommend that you use protected fuses in order to prevent
the spread of fused particles in the event of blowout.
H2B general description
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