15 Reducing / Increasing the “Spring pre-tension” (SPTE)
The spring pre-tension is factory set to 210° and is normally not necessary to adjust. If adjustment
has to be carried out see below.
a Loosen the door stop arm. Remove if fitted on the topside, slide down if fitted on the bottom.
b Turn the potentiometer for spring pre-tension (SPTE) clockwise until the door opens to 45°.
c Loosen the drive arm fixing screw.
d Moving the door towards open position, reduces the tension, or:
Moving the door towards closed position, increases the tension.
e Tighten the drive arm.
f Turn the potentiometer SPTE to 0°.
g Open the door to required open position, plus approx. 15 mm, by turning the potentiometer
SPTE clockwise.
h Mount the door stop arm as close as possible to the open door stop block, fine- adjust with the
screw if necessary.
i Turn the potentiometer SPTE to 0°.
j Push the LEARN BUTTON.
k Let the door do the learn cycle without touching it.
Note! Max. allowable spring pre-tension is 210°. Over-tension may damage the spring or overheat
the motor.
1005088-en-22.0Issue 2021-02-2462
15 Reducing / Increasing the “Spring pre-tension” (SPTE)
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