Becker Centronic VarioControl VC320 Assembly And Operating Instructions Manual page 23

Connect the tubular drive as shown below:
Tubular drive
Programme one transmitter in the receiver (See section on "Programming radio
channels")
Note
Ensure that optimum radio reception is achieved.
Check the rotation direction of the tubular drive. If the rotation direction
is incorrect, the connecting wires s and t of the tubular drive must be
changed round.
Sealing washer
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