Nova-Tech Pulsafeeder OMNI DC7 - Manual (Page 9)

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6. Equipment Startup
6.1 Fastener Inspection
All pump fasteners should be checked prior to pump operation, and occasionally during use.
This would include reagent head mounting bolts, motor mounting bolts, and the hardware that
secures the pump to its foundation. Most hardware can be checked simply to ensure it is not
loose. However, utilize the following values when checking reagent head bolt torque:
Reagent Head Bolt Torque
Model Material
# Bolts and size N-m In. - Lbs
Plastic (8) M10 * 1.5 8.5 75
DC7
Metal (8) M10 * 1.5 8.5 75
6.2 Output Adjustment
All OMNI ® pumps have a hand wheel for manual stroke adjustment. The hand wheel can be
adjusted to any point from 0 to 100%. This value represents the stroke length setting and
therefore the flow rate of the pump relative to its maximum output.
1. Turn the red lock screw counterclockwise to release the stroke lock. Making adjustments
without releasing the lock may damage the mechanism.
Figure 4, stroke adjustment knob and scale
2. Adjust the hand wheel to the desired output.
a) The stroke barrel indicates stroke length in 20% increments.
b) The hand wheel indicates stroke length in 0.25% increments.
For example, to set the pump to 75% stroke length, (starting from the factory default setting
of 0%) turn the hand wheel clockwise until the 60% indicator on the stroke barrel is aligned
with the edge of the knob at the “0” position on the knob scale.
Continue the clockwise rotation until the hand wheel indicator passes zero again (this is 70%)
and comes to 5, this is 75%. Refer to Figure 4.
3. Turn the lock screw clockwise to lock the stroke adjustment into position.
Adjustments can be made while the pump is at rest or operating, although adjustments are
easier to make while the pump is in operation.