6.4.3.2 Assembly
1. Insert the clamping bush into the rotor.
2. Slightly tighten the two opposite screws.
3. Place the rotor on the shaft without using force.
4. Tighten the two screws evenly with the torque wrench with the tightening torque according to Table 7.
Type of bush 1008 1108 1210 1215 1310 1610 1615 2012 2517 3020
Tightening moment [Nm] 5,7 5,7 20 20 20 20 20 31 49 92
Table 15: Tightening moments for various types of bush
7 7. Electrical connection
NOTE
› The motors contain triple posistors. More than two PTC chains may not be switched in series, as this can lead to
undefi ned cut-outs.
› Maximum check voltage of PTC is 2,5 V.
WARNING
Hazard from electrical voltage!
» Electrical connection only by a trained electrician or trained and instructed qualifi ed personnel!
» Electrical connection in accordance with the valid regulations.
» Prevent the ingress of water into the connection box.
» Observe 5 safety rules for the electrical expert!
– disconnect from the power supply (all-pole),
– prevent switching on again,
– test absence of voltage,
– earthing and short-circuiting,
– protect adjacent live parts by covers and barriers.
You will fi nd the electrical connection plan on the base plate of the motor on in the terminal box.
Bring about the electrical connection according to the connection plan.
CAUTION
Property damage as a result of motor overheating
» The motor can overheat and be destroyed if the thermal relays/PTC not been connected.
» Thermal relays/PTC always connect to a motor protective device!
» In motors without integrated thermal protection, motor protection devices are to be provided by the customer.
Connect the thermo-contacts/posistor connections to a motor protection switching device.
In cases of plastic terminal boxes, do not use any gland connections of metal.
Use suitable rubber sockets for cable ducts.
Lay the mains feed line through a bore from the outside.
Tighten the nuts of the cable ducts well in order to guarantee protection class IP68.
Screw the lid of the terminal box / repair switch evenly tight.
Additionally seal the lid screw connections of plastic terminal boxes with sealing putty.
45
Roof fans - V 1.0
7. Electrical connection
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