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Transport, assembly, and connection
3.3 Electrical connection
A5E00177602A AD
34
Siemens AG Operating Instructions 2.02 1PH728
3.3.4
Connecting the fan
Safety notes
Please observe the following safety instructions relating to connecting a fan:
CAUTION
Only operate the motor with fan
If the motor is operated without fan it will overheat because the heat that is generated
cannot be dissipated. Destruction of the motor is the consequence.
Provide a protective circuit that prevents the main motor from being switched on when the
fan unit is not in operation.
CAUTION
An external fan is only suitable for one direction of rotation
The separately-driven fan unit is only designed for one direction of rotation corresponding
to the direction of rotation arrow. Operation with the wrong direction of rotation can cause
overheating or destruction of the motor.
Ensure that the external fan is operated in the proper direction of rotation. The direction-of-
rotation arrow and the direction of movement of the fan impeller are indicated on the rear
side of the blower.
If necessary, switch the direction of rotation by swapping over two phase conductors in the
terminal box.
Connection
Connect the fan in the terminal box of the fan motor.
ແ
Figure 3-4
Detailed view of fan, ① fan unit terminal box
[ID: 337.02]
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