Watson-Marlow 520DuN IP66/NEMA 4X User Manual 83
29 520R, 520R2 and 520RE
installation
29.1 Opening the pumphead guard
Unlock the pumphead guard by turning the guard fastener
1
⁄4 turn anticlockwise
with a slotted screwdriver.
Open the guard to its full extent to create maximum clearance for the tube
ports.
Ensure that the rollers rotate freely and that the tube clamps are clean.
Always isolate the pump from the mains power supply
before opening the guard or performing any positioning,
removal or maintenance activity.
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