FAAC A952, Руководство пользователя, Страница: 42 / 94

A952 40 532310 - Rev.A
-
+
+
-
28
1
29
3.12 ADJUSTING THE SPRING
The A952 is fitted with a spring that opens or closes the door (according to the application) in the absence of
mains power.
The spring is factory set to the minimum preload. According to the characteristics of the door (e.g. friction,
seals, air currents), the preload can be adjusted to obtain the appropriate force for the movement.
The spring preload is adjusted using an Allen key as shown in
28
:
- Turning the Allen key clockwise increases the force
- Turning the Allen key anticlockwise decreases the force
If the door is used as an escape route, the manual opening force must not exceed 150 N measured at the end
of the leaf at a height of 1 m from the ground.
The spring must only be adjusted with the operator installed and connected.
Turning the Allen key moves the pin
29
-1 inside the slot. The entire width of the slot is available for ad-
justment.