5 Bottom Blowdown
Page 94 Mk8 MM Expansion Features Installation and Set-Up Guide 04.09.2016
Figure 5.4.2.ii Servo Closed
The bottom blowdown module must see the servomotor at the closed position when first enabled, to
clear the warning.
Press to drive the servomotor to the closed 0.0
O
position. Pressing will
nudge the servomotor in the closed or open direction. Pressing will stop the servomotor driving.
When the servomotor is moving, the message ‘Servo Closing’ will appear, and when it has reached the
closed position, the message will change to ‘Servo Closed.’ The potentiometer will not need to be
zeroed on the industrial Unic servomotors.
Press to drive the servomotor towards the closed position using the battery power within the
module. . A working battery will have 13V + in the cells, if this falls below 12.4V, there will not be
enough voltage in the battery to drive the valve to the closed position should a power failure Bottom
Blowdown Controller Main Power Fault will occur.
To test the battery operation, drive the servomotor to the closed position, then press . The
valve will then be opened to the parked position using mains power, and then it is driven to the closed
position using the battery power to test the battery. If the battery cannot drive he valve to the closed
position, a Bottom Blowdown Servo Battery Drive Fault will occur.
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