AUMA Part-turn gearboxes GS 50.3 - 250.3, primary reduction gearings VZ 2.3 - 4.3_GZ 160.3 - 250.3 - Manual (Page 15)

Setting end position OPEN
.
Remove all bolts (03) at limit stop housing (10) (figures F, G).
.
Change to manual drive and move the valve manually to end position OPEN.
.
In case limit stop housing (10) has not yet rotated, turn it counterclockwise up to
the stop. .
Turn limit stop housing (10) back by ½ turn clockwise. This ensures that the
mechanical end stop is not reached in electric operation. .
If the holes of limit stop housing (10) do not correspond to the threads of the
housing (1), take off the limit stop housing (10) and replace it in the required
position.
.
Fasten bolts (03) with lock washers (04).
.
Fasten bolts crosswise with a torque according to table 3.
.
If the position of the pointer cover does not align with the symbol OPEN, slightly
loosen the screws of the pointer cover. Turn the pointer cover to the OPEN
symbol and fasten the screws again.
Switching off in end position
OPEN
.
Turn back the valve from the end position by an amount equal to the overrun. .
Set limit switching according to the operation instructions SA/SAR.
Setting end position
CLOSED The end stop need not be set since the required swing angle has been set in the
factory.
.
Move gearbox to the end stop in position CLOSED.
The last part of the travel has to be made manually.
.
To turn the valve back manually from the end position by an amount equal to the
overrun, proceed as follows:
For actuators mounted directly:
by approx. 4 to 6 turns at the handwheel.
With mounted primary reduction gearing VZ/GZ:
by approx. 10 to 15 turns at the handwheel, according to the reduction ratio of
the primary reduction gearing.
.
Set limit switching in actuator for the end position CLOSED according to the
operation instructions SA/SAR.
If the swing angle does not match, refer to section 10.
15
Operation instructions Worm gearboxes GS 50.3 – GS 250.3