Emerson VSG & VSSG Troubleshooting Guide download pdf (Page 47)

VSG/VSSG • Compact Logix PLC Manual •Vilter/Emerson • 35391CL

8.2 Disconnect electrical leads at actuator.

8.3 Remove four cap screws that fasten the actuator to the valve mounting bracket.

8.4 Lift the actuator off the valve stem.

8.5 Rotate the actuator to the desired position.

8.6 Slide actuator down on the valve stem.

8.7 Secure the actuator to the valve mounting bracket with four cap screws.

8.8 Re-connect the electrical leads at the actuator.

8.9. Restore 120V and 24V power to the actuator.

NOTE: The ball valve and the actuator must always be assembled in the CLOSED position. See Section

3.0 Calibration above.

CAUTION: Be careful not to move the ball stem during this operation. Turning the ball valve 90° in

either direction will reverse the control action of the valve and the compressor will experience high oil

temperature within minutes. Turning the ball valve 180° has no detrimental effect.

9.0 Manual Override

The actuator has a handwheel that can be engaged to override the electrically determined position of

the ball valve.

Push and rotate to engage.

Push a second time to de-clutch.

Oil Mixing Valve

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Emerson VSG & VSSG Troubleshooting Guide Page 47