Apply Pressure in this direction when reinstalling
the tubing to ensure that it fits closely to the curve
of the pump
MAINTENANCE MODEL YB8
April 1999/Manning Environmental Inc.
Page C-4
orientation (wh
ich end is placed on the inlet side and which end is
placed on the outlet side) does not matter.
4) Place the new tube in the pump making sure it is seated
flush against the inside wall of the pump. Pushing on the
tube to get it flush against the back wall of the pump will
help. It should follow the curve of the cavity with no gaps
between the tubing and the wall and have equal amounts of
tubing extending out past the pump housing.
5) Once the tube is back in place, reconnect the tube to the
liquid connectors or in the case of the ultrasonic sensor,
replace the tube in the sensor, making sure that is seated in
the bottom of the sensor and that good contact is made
with both walls of the sensor. Close the hinged lid and
secure. Re-install the clear plastic face plate and tighten it
securely with the 3 thumb screws removed earlier. Do not
overtighten the screws. The face plate is made from clear
material to aid in confirming that t he pump tubing is
correctly installed. Now that the cover is back on, look
through it and make sure t he tubing still follows the curve
of the pump cavity with no gaps. Also verify that equal
lengths of the tube extend out both the inlet and outlet
sides of the pump. Insert the connectors back into the
ends of the pump tubing making sure to maintain the
orientation of the intake and discharge lines. Run a test
cycle and check to see that when the pump is turning that
the tubing is staying in place within the pump and that it is
not “riding” up or down. If the tubing is “riding up or
down, you can affect this by twisting the tubing at the inlet
to the pump either clockwise or counterclockwise as the pump is turning. You should see the
tubing either go up o r down when t wisted. T wist it t ill t he tubing is centered between t he rollers
and stays there when the pump is going forward or backward.
6) Reset the tube life pump count in *19. A peristaltic units ability to o perate and perform t o
specifications, such as transport velocity and lift height is, to a certain extent, determined by the
medical grade silicone rubber pump tubing used in t he system. T he characteristics o f t he tubing
change as it wears. It becomes less resilient, less able to maintain its shape, develops pinch points
on the outside edge of the tube, and as such is not capable of the performance it had when it was
new. T o maintain optimum performance, it is necessary t o mo nitor t he wear on the tube. * 19
does this by enabling the operator to set a maximum number of pump revolutions, the tube
currently in use, will be allowed to withstand. T his, in effect, determines the tube's useful life.
Manning recommends not exceeding 1,000,000 pump revolutions for a singular tube as, by this
time, there is risk that the tubing could fail causing a variety of problems. *19 should be used
every time the pump t ubing is changed. T he user will be alerted t o change the tubing, when the
tubing reaches the number of counts set. The warning will appear, every time the user executes a
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