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Step 16: Pull the return pulley outwards outside the frame and cut the belt
to length.
Make sure all teeth openings of the belt clamp can be filled by the
timing belt. Leave one additional tooth on the belt (cut one less off) in case of
misalignment of the teeth.
Step 17: Fix the belt to the belt clamping plate by keeping the return pulley
swivelled outwards.
If moving the vent belt manually, never move faster
than 10 cm/sec.! With or without the motor powered,
this can cause damage to the motor and is not covered
by warranty.
Step 18: Tighten the timing belt with the return pulley swivelled out. Make
sure with the clamping plate next to the motor that the belt is loose from the
profile.
Step 19: Fold the return pulley back in and fix it by the fixing plate + cover
