Watson-Marlow 520Du - Manual (Page 87)

Watson-Marlow 520DuN IP66/NEMA 4X User Manual 87
29.3 520RE: fitting the drain port
The drain port is an optional extra, supplied with the pumphead. It is strongly rec-
ommended that users fit it before the pump is operated. It may be done with the
rotor in position or removed.
Remove the drain plug from the bottom of the pumphead. The drain plug is
flexible. It may be removed using finger pressure from within the pumphead,
or by accessing its flange from outside with a fingernail.
Drop the port into position from inside the pumphead.
Fit the supplied port retaining nut (
3 ⁄
8
in BSP) and finger-tighten.
Fit drainage pipework as required (not supplied).
29.4 520RE Element loading
520RE tubing element pumpheads are factory-set to accept Watson-Marlow 2.4mm-
wall tubing elements. Elements fitted with either quick-release industrial connectors
or Tri-clamp sanitary connectors may be used; however, it is vital to match the
pressure rating of the element with the pressure rating of the pumphead so
that the correct roller-spring rate and occlusion settings are used. The pressure rat-
ing of the pumphead appears on the flexible rotor cap in the centre of the rotor. The
pressure rating of the element appears on the connector sleeve.
Note that the rotor cap and the element connector sleeve are colour-coded.