Operation; Optical Position Indicator; Manual Override (Option); Setting The Limit Switches - GEM 423 Installation, Operating And Maintenance Instructions

13

Operation

13.1

Optical position indicator

The actuator of the butterfl y valve has an
optical position indicator which indicates the
status of the butterfl y valve.
Closed
13.2

Manual override (option)

CAUTION
Only actuate the manual override
when the power is switched off.
® Damage to the actuator.
CAUTION
Set the actuator position to "centred"
after using the manual override.
® Trip cams may be outside the limit
switches as the limit switch position
was manually exceeded by the manual
override.
® Damage to the actuator.
Set the actuator position to "centred"
G
before electrical operation.
1. Remove red protective cap.
2. To open the butterfl y valve turn the Allen
key (SW3) clockwise 1 until the position
indicator shows "open".
3. To close the butterfl y valve turn the Allen
4. Reinsert red protective cap.
13.3
1. Disconnect the plant from power supply.
2. Remove the protective caps 1.
Open
3. Undo screws 2.
4. Disassemble the cover of the actuator 3.
5. Undo screws at the respective limit
6. Move limit switches to the desired
7. Tighten limit switch screws.
8. Put on cover of actuator 3.
9. Tighten cover 3.
10. Put on protective caps 1.
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key (SW3) anti-clockwise 2 until the
position indicator shows "closed".

Setting the limit switches

Tools required for setting
the limit switches:
Allen key size SW3

Small Philips head screw driver

switch (4: "closed", 5: "open").
position.
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