5
7. SETTING OF LIMIT SWITCHING
(
Figure E
)
•
Engage manual drive as explained in Section 4.
Setting of the CLOSED End Position
(black area)
•
Turn the handwheel clockwise until the valve is fully closed. Consider possible overrun as
described in Section 6.
•
Press down and turn spindle (A) in direction of the arrow. A ratchet will be felt and heard, the
pointer (B) turns for every 90 degrees.
CAUTION:
DAMAGE MAY RESULT TO THE COUNTER GEAR MECHANISM IF THE SLOTTED
SHAFT IS NOT PUSHED DOWN WHILE TURNING TO ADJUST THE LIMIT SWITCH.
When pointer moves towards point (C), the spindle should not be turned any further. If the spindle
has been turned beyond that point inadvertently, continue turning and approach the setting point
again.
CAUTION:
Make sure that spindle (A) springs up to its original position.
NOTE:
Distinct “clicks” will be heard and felt while turning the slotted shaft. When the pointer
points toward the
switch tripped
indicator, no additional clicks should be felt or heard. If
additional clicks are heard or felt, the setting instructions (above) must be repeated.
•
The limit switch is now properly set. Release the slotted shaft (to re-engage the counter gearing)
by removing the screwdriver blade. Ensure that the shaft returns to the previous upright position.
Setting of the OPEN End Position
(white area)
•
Turn the handwheel counter-clockwise until the valve is fully open. Consider possible overrun as
determined in Section 6. Compensate overrun by backing off with the manual drive.
•
Repeat setting procedure as described for the closed position using spindle (D), pointer (E) and
point (F).
8. SETTING OF DUO COUNTER GEAR OR FOUR GEAR TRAIN LIMIT SWITCHING
(optional) (
Figure E
)
CAUTION:
The intermediate switching point should be approached for setting purposes in the
same direction as in motor operation.
•
Move valve to the required intermediate position.
