1 opening the pumphead guard – Watson-Marlow 520Du User Manual
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Watson-Marlow 520DuN IP66/NEMA 4X User Manual
85
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.
29.2 520R and 520R2 tube loading
520R continuous tubing pumpheads are factory-set to accept Watson-Marlow
1.6mm-wall tubing. 520R2 continuous tubing pumpheads are factory set to accept
Watson-Marlow 2.4mm-wall tubing. Pumping performance may be adversely affect-
ed if Watson-Marlow tubing is not used.
Always isolate the pump from the mains power
supply before removing the track or performing any
positioning, removal or maintenance activity.