Extractor fan with overrun and pull cord switch

Extractor fan with overrun and pull cord switch

Connection with 3 Wires

Preparation:
neutral conductor N – blue
phase L – usually black or brown
phase LT – usually black or brown

Connection:
The phase L is without a switch and always conducting.
The phase LT is with a switch and conducts if the switch is closed. When the switch (pull cord or lightswitch gets closed, the fan starts to work.
The neutral conductor gets connected to the point N of the fan.

Explanation:
The
fan starts when the switch gets closed (phase LT) or the pull cord switch gets activated. As long as the
switch is activated the fan is working. After opening the switch, the fan
changes into the overrun-mode (timer). After the adjusted time the fan
stops working automatically.

Schematic:

Connection with 2 Wires

Preparation:
neutral conductor N – blue
phase L – usually black or brown

Connection:
The phase L is without a switch and always conducting.
The neutral conductor gets connected to the point N of the fan

Explanation:
The
fan starts when the pull cord switch gets activated. As long as the
switch is activated the fan is working. After deactivating the switch, the fan
stops directly.

Schematic: