6
OPERATION
The swing door operator works electro-hydraulically. It opens with an AC-motor that via
a hydraulic unit and an arm system transmits the power to the door leaf. The closing
power is from a coil spring. The movement of the door is controlled by limit switches and
valve screws.
Opening
When an opening impulse is received by the control unit, the motor starts and the hydraulic
unit rotates the drive shaft and arm system (door) with high speed towards open position.
Before fully open position, the speed is reduced to low speed. The door stops and the motor
rotation ceases when the selected door opening angle is reached. This open position is kept
by a hydraulic valve.
Closing
The spring closing starts when the hold open time has run out. Before fully closed position
the speed is reduced to low speed, which will be kept until the door is completely closed.
The door is kept closed by spring power.
Functions of program switch
AUTO:
The operator opens the door for the duration of the hold open time.
MAN:
Manual use.
OPEN:
The door is held permanently open.
