DeZurik LA-10 Инструкция - Страница 9
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Печатать страницуReassembly and Installation
27. Center punch the end of the valve shaft on each side of the key to retain key in keyway.
28. Complete the assembly by following steps 2 -12 in the SETTING STOPS section of this manual.
Setting Stops
1. Remove inner and outer guide bars if present.
2. Thread stop nuts along shaft to get desired open and closed positions of valve. To get longer
stroke, move stop nuts toward middle of actuator.
3. Install inner and outer guide bars, and start screws into actuator. Leave screws loose.
4. Operate valve to full open and closed positions to check locations of stop nuts.
5. If open or closed position is not satisfactory, follow steps 1 through 4 above. If open and closed
positions are both satisfactory, go to next step.
6. Tighten screws for guide bars as follows: while using a screwdriver to hold the guide bars away
from the actuator shaft, tighten the screws.
7. Move the actuator to the closed position.
8. Clean the mating surfaces on the actuator housing and cover.
9. Using RTV or another silicone based sealant, form a gasket on the mating surface of the
actuator housing.
10. Install the actuator cover.
11. WITH POSITION INDICATOR: If the actuator has a pointer, install the seal, flat washer, pointer
(pointing to "CLOSED") and jam nut in that order.
WITHOUT POSITION INDICATOR: If the actuator does not have a pointer, (Buried Service):
Install compression plug in hole in middle of actuator cover.
12. If the actuator is powered, reconnect power to the actuator.
Troubleshooting
Symptom
Actuator closes
to wrong position
Actuator opens
to wrong position
Actuator won't move
to closed position stop
Motor turns
but actuator does not turn
Actuator turns
but valve does not turn
Motor turns wrong way
Valve turns wrong way
March 2009
LA-Series Manual & Electric Actuators
(Continued)
Possible Cause
Closed position stop
is set incorrectly
Open position stop
is set incorrectly
Obstruction in valve
is preventing closure
Key in motor drive is sheared
Key that connects yoke to
valve shaft is sheared
Motor wired incorrectly
Yoke-to-shaft key in 90
degrees off
Page 9
DeZURIK
Corrective Action
Adjust closed position stop
Adjust open position stop
Remove obstruction
Remove drive from
actuator and replace key
Replace key in valve shaft
inside actuator housing
See motor wiring diagram
Disengage actuator yoke from
valve shaft. Index yoke 90
degrees. Reengage.
D10308