17. Reducing/Increasing the "Spring pre-tension" (SPTE)
The spring pre-tension is factory set to 360° and is normally not necessary to adjust. If adjustment has to be carried out, the electrical power must be switched on during spring pre-tension and learn.
- Loosen the door stop arm. Remove if fitted on the top side, slide down if fitted on the bottom.
- Turn the potentiometer for spring pre-tension (SPTE) clockwise until the door opens to 45°.
- Loosen the drive arm fixing screw.
- Adjust the door position:
- Moving the door towards open position reduces the tension.
- Moving the door towards closed position increases the tension.
- Tighten the drive arm.
- Turn the potentiometer SPTE to 0°.
- Open the door to required open position, plus approx. 15 mm, by turning the potentiometer SPTE clockwise.
- Mount the door stop arm as close as possible to the open door stop block, fine-adjust with the screw if necessary.
- Turn the potentiometer SPTE to 0°.
- Push the LEARN BUTTON.
- Let the door do the learn cycle without touching it.
18. Guide for Installation and Adjustments
18.1 Complementary Safety Devices Swing Doors
If there is any risk for finger jam, consider the following add-ons:
- Internal Doors: Add finger protection strip at the hinge side (Article No. 833334).
- External Doors: Add finger protection roll (Article No. 833333).
18.2 Swing Doors Opening and Closing Time
Adjust, as a minimum, the operator's opening and closing time according to the guidelines below.
18.2.1 How to find the correct opening and closing time
- Measure the door width.
- If the door weight is unknown, follow the instructions in “Diagrams for door weight”.
- Use the reference diagram (implied) to find the correct minimum opening/closing time “t”.
Note: Refer to standard EN 16005 or local regulations regarding Minimum Swing Door Opening/Closing Time for LE Compliance.
18.3 Diagrams for Door Weight
Follow this procedure to estimate door weight based on dimensions and glass thickness.
- Measure the door width (DW) and the door height (DH) in metres for one door leaf only.
- Calculate the area: DW x DH.
- Select the diagram corresponding to your type of door and current glass thickness to find the weight.
For an Aluminium door with:
- DW = 1.5 m
- DH = 2 m
- Glass thickness = 12 mm
Area: 1.5 x 2 = 3 m²
Using the "Aluminium Frame with glass" reference: Start with the area (3 m²), follow the line up to the 12 mm glass curve, then go left to read the door weight: 95 kg.
Note! The weights can vary depending on the door design (the table/chart values are typical only).