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14 Changing group of parameters
14.3
Reducing / Increasing the "Spring pre-tension" (SPTE)
The spring pre-tension is factory set to 360° and is normally not necessary to adjust. If adjust-
ment has to be carried out, the electrical power must be switched on during spring pretention
and learn, see below.
Make sure the potentiometers "Extended closing torque" (CLTQ) and "Power assist" (POAS)
are set to 0°.
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 (5/8"), by turning the poten-
tiometer 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 720°. Over-tension may damage the spring or
overheat the motor.
SPTE
90°
68
180°
210°
Issue 2012-06-27
1007718-US-3.0
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