Siemens Flender H2NV Series - Gear Unit with Backstop; Checking the Direction of Rotation Using a Phase­sequence Indicator; Direction­of­rotation Check by Dismounting the Coupling

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BA 5060 EN 04/2011
7.2.3 Gear unit with backstop
Observe details in item 5.7, "Backstop"!
Before startup, check whether the backstop can be turned manually in the freewheeling direction without
exerting undue force. Observe the directionofrotation arrows on the housing.
To avoid damaging the backstop or the gear unit, the motor must not be run adversely
to the stop direction of the gear unit.
Observe the notice fixed to the gear unit.
The backstop must be replaced after 10 000 operating hours!
If the gear unit is operated at speeds below the speed at which the backstop
disengages, the backstops must be regularly renewed. The frequency of change is
stated on the dimensioned drawing prepared in accordance with the order and on
a plate on the gear unit. This plate is attached to the gearunit housing close to the
backstop.
7.2.3.1 Checking the direction of rotation using a phasesequence indicator
Before connecting the motor, determine the direction of rotation of the threephase current supply using
a phasesequence indicator, and connect the motor in accordance with the predetermined direction of
rotation.
7.2.3.2 Directionofrotation check by dismounting the coupling
• Release fastening bolts.
• Push up cam part.
• Screw fastening bolts in under the cam part as spacers to enable the motor shaft to rotate freely.
• Carry out directionofrotation check.
• Fit in reverse order.
1 Motor bell housing
2 Fastening bolts
3 Cam part
1
3
2
Fig. 21: Directionofrotation check