Emerson VSG & VSSG Software Manual page 45

6.1 100% OPEN
Oil flow stream is entirely bypassing the oil cooler
6.2 99% to 1% OPEN
Oil flow stream is partially by-passing the oil cooler and partially diverted to the oil
cooler
6.3 0% OPEN
Oil flow stream is entirely diverted to the oil cooler
7.0 Control Settings
The oil temperature control setpoints are entered on the compressor controller screen "Oil
Mixing Valve PID (Oil Return from Cooler)".
8.0 Rotating the Actuator for Convenience of Installation
The actuator can be rotated to any one of four positions.
8.1 Remove both 120V and 24V power from the actuator.
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.
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