9.
Check that the leak detect sensor is clean and free from process chemical
10.
If chemical residue is found, isolate the pump from the mains power and contact
your local Watson-Marlow representative.
Fitting a new pumphead
Fitting a new pumphead is a reverse procedure of the pumphead removal.
1.
Remove the new pumphead from its packaging.
2.
Turn pressure switch on pumphead to 'in use' position (not required for ReNu CWT).
In use
position
P<1 bar (15 psi)
3.
Align the new pumphead with the pump drive shaft and slide into position on the
pump housing.
4.
Rotate the pumphead in an anti- clockwise direction by approximately 15° to
engage the retaining lugs.
5.
Lock the pumphead into position using the pumphead locking latch.
6.
Connect the input and output connections to the pumphead.
7.
Apply mains power to the pump, press start and run the pumphead for a few
revolutions.
8.
Stop the pump and isolate it from the mains power supply, then recheck the
retaining lever is still correctly locked in position.
9.
qdos20 PU only:
Confirm NEW PUMPHEAD has been installed
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