3.12 Electrical connections
Electrical installation may be carried out by authorized and trained
personnel only.
Connect the burner according to the electrical diagrams delivered with burner. Follow
general and local standards and regulations as well as requirements set for electrical
connections for electrical equipment.
Configure the burner installation with a switch that allows it to be disconnected from the
supply mains. Grounding must be in order before commissioning burner.
See the electrical diagram for maximum cable lengths.
Burners with an integrated control system have separate power supply connections
for both the burner’s motor and its control circuit. The supply for the control circuit
needs to be connected directly to the burner wiring base. Motor outputs require two
cable connections: the burner’s control circuit needs to be wired to the motor output’s
control circuit and the motor output to the motor. The exact connections depend on the
installation’s configuration and must be made on site in accordance with local rules and
regulations.
Also note that in certain models, the motor output is integrated in the burner wiring
base.
In burners with an external control cabinet, the supply for the control circuit needs
to be connected to the cabinet. In the cabinet, the burner control circuit needs to be
wired to the motor output. Burner configurations may vary; please refer to the electrical
diagrams supplied with the burner.
Keep the cables and wires of different voltage circuits separate.
● When using a frequency converter, do cabling work and grounding according to
manufacturer instructions.
● Position the frequency converter as near to the motor as possible to avoid
interference caused by long cabling.
● If possible, use a separate cable rack for supply cables. Otherwise, keep the supply
cables separate from control and bus cables.
● Check that shielded cables are properly connected.
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