SystemAir 94729, Installation And Operating Instructions Manual, Page: 12 / 20

8 | Electrical connection
9 Electrical connection
Safety information
♦ Observe 2 Important safety information , page 1
♦ Prevent the ingress of water into the connection box.
Connection
♦ Check if the data on the nameplate matches the
connection data.
♦ Complete the electrical connection according to the
circuit diagram.
♦ Fans with EC- motors must be switched on/off via the
control input.
♦ Connect the cable end in a dry environment.
♦ Install a circuit breaker in the permanent electrical
installation, with a contact opening of at least 3 mm
at each pole.
Protective grounding wire
The protective grounding must have a cross-section equal to or greater than that of the phase conductor.
Residual current circuit breaker
All-current-sensitive residual current circuit breakers are required for use in alternating-current systems with 50/60
Hz, in combination with electronic devices such as EC motors, frequency converters or uninterruptible power supplies
(UPS).
9.1 Wiring diagram
Wiring diragram
9.2 Protecting the motor & heater
Motor
Note:
In fans equipped with an EC motor, there is no additional motor protection needed. The motor protection is
integrated in the electronics of the motor.
Heater
Note:
• The SUE has a built-in airflow sensor that ensures that the heater will not actuate, unless there is an
appropriate airflow through the duct heater.
• The SUE is equipped with two overheating cut-outs, to prevent overheating when the airflow is too low
or in case of a fault in the system
1 x overheating cut- out with automatically reset
1 x overheating cut- out with manually reset ( *Reset button )
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