Watson & Sons 520DUN Pumphead position, removal and replacement, To reposition the track

28.1Pumphead position, removal and replacement

Always isolate the pump from the mains power sup- ply before opening the guard or performing any posi- tioning, removal or maintenance activity.

The pumphead track can be fitted in one of three orientations to provide right, up or down input/output port positions, whichever is convenient. Position the pump- head so that the tube ports face up or down only where the drive is placed on the bench edge - otherwise the pump tube or the hinged guard will impact the bench. Do not position the pumphead so that the tube ports face the keypad. Doing so may result in a safety risk.

The pump can be configured for clockwise or counter-clockwise rotor rotation. Please note, however, that tube life will be greater if the rotor rotates clockwise; and that performance against pressure will be maximized if the rotor rotates counter-clock- wise.

To reposition the track

￿Open the pumphead guard as described under 27.1 Opening the pumphead guard, below.

￿Remove the rotor as described under Rotor removal, below.

￿Undo and withdraw the four track-retaining screws using a slotted screwdriver.

￿Remove the track.

￿Relocate the track in the desired position. Replace and tighten the track-retain- ing screws.

￿Replace the rotor as described under Rotor replacement below.

￿Close the guard, pushing it fully home until the latch engages.

Watson-Marlow 520DuN IP66/NEMA 4X User Manual 81