4 – 9
Section 4 • Operation
VSS/VSR/VSM/VSH/VSSH Compressor • Installation, Operation and Service Manual • Emerson • 35391S
10.
Press and hold down on the photo-chopper shaft to
disengage the brake slowly, releasing tension from
the motor mount, see Figure 4-6. Use the “+” but
-
ton to pulse the actuator to where the slide is just
off of the mechanical stop and there is no tension
on the motor shaft.
11.
Quickly press and release the blue button on the ac-
tuator again. The red LED will now flash at a slower
rate, indication that the minimum slide valve posi-
tion (zero position) has been set.
12. Use the “+” button on the Control panel to drive
the slide to its maximum “mechanical stop” posi
-
tion. Release the “+” button when the slowing of
the motor rotation and a winding sound from the
actuator motor is noted.
NOTE
If the photo-chopper spins faster than 4800 rpm,
the actuator will go into an over speed fault and
recalibration will be required.
13.
Press and hold down on the photo-chopper shaft to
disengage the brake slowly, releasing tension from
the motor mount. Use the “-” button to pulse the
actuator to where the slide is just off of its mechani-
cal stop and there is no tension on the motor shaft.
NOTE
After the blue button is pressed for the third time, an
mV reading will be displayed in the Current field. Make
sure the mV value is at least 150 to 200 mV higher than
the max setpoint on the screen.
14.
Quickly press and release the blue button on the
actuator one more time. The red LED will stop
flashing. The actuator is now calibrated and knows
the minimum and maximum positions of the slide
valve it controls.
Now the Capacity Channel is automatically calibrated
based on the calibration settings made to the actuator.
CAUTION
Do not over tighten screws. Failure to comply may
result in damage to equipment.
15.
Gently lower the plastic cover over the top of the
actuator to where it contacts the base and O-ring
seal. After making sure the cover is seated properly,
gently tighten the four #10 screws.
16.
Repeat procedure to calibrate other slide valve
actuator.
Press down on Photo-chopper to release tension from mo-
tor mount.
Figure 4-6. Photo-chopper
Содержание Vilter VSH
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