Figure 5.2.2.iii Moving to Closed Position
To set the closed position of the bottom blowdown, press either which will drive the
servomotor in the direction of the closed position continuously until the button is pressed, or
press which will make a small valve movement towards the closed position. The closed
position should be set at 0 degrees; adjust the potentiometer if necessary. To set the open position, use
the corresponding buttons for the driving the valve towards the open position.
The parked position is a just closed position, and is set as a constant at 35 degrees away from the fully
closed position set by the user. During blowdown, in the valve closed interval, the valve moves to the
parked position rather than the fully closed position, and then to the open position to blow out the
sludge. It takes 3 seconds quicker to go from the open position to the parked position, than to go from
the open to the closed position.
Press , and to check the positions that have been set.
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