2.5.9
Checking and adjusting the belt tension (for fast door leaves)
a Loosen the fixing screw (32) without removing it.
b Screw the adjustment screw (33) to its outmost position.
c Tension the tooth belt by pulling the tension wheel assembly (15) by hand. Tighten the tension
wheel assembly to the beam with a torque of 3 Nm.
d Tighten the adjustment screw (33) until there is a gap of approx. 1-2 mm between the lock nut
(34) and the bracket according to illustration below, but not further. Be sure not to overtighten,
otherwise the adjustment screw (33) might damage the tension wheel (31).
e Retighten the fixing screw (32) with a torque of 10 Nm.
Note! Do not make any adjustment on the lock nut (34).
Tension wheel assembly
15
Tension wheel
31
Fixing screw
32
Adjustment screw
33
Lock nut
34
1018482-EMen-2.0
Issue 2019-07-13
124
2 Mechanical installation