Watson-Marlow 401U - Manual (Page 3)

3
Safety
In the interests of safety, this pump and the tubing selected should only be used by competent, suitably
trained personnel after they have read and understood this manual, and considered any hazard involved.
Any person who is involved in the installation or maintenance of this equipment should be fully competent
to carry out the work. In the UK this person should also be familiar with the Health and Safety at Work
Act 1974.
There are no user serviceable parts inside this pump. The unit should be turned
to Watson-Marlow for service.
Installation
• The 401U/D is suitable for single phase mains electricity supplies only via the 230VAC-15VAC mains
transformer or a 100-240VAC-18VDC mains adaptor. The CW/STOP/CCW front panel potentiometer
should be set in the STOP position before the power supply is connected by inserting the mains
transformer jack plug into the back panel socket.
• Use only the approved 15V Mascot type 810 AC/AC adaptor or the 18VDC CMP SA07H18 AC/DC
adaptor supplied with the pump.
• To ensure correct lubrication of the gearbox, the pump should be run only while its feet are standing on
a horizontal surface. The pump should be positioned to allow a free flow of air around it.
Recommended operating procedures
DO keep delivery and suction lines as short as possible using a minimum number of swept bends.
DO use suction and delivery pipelines with a bore equal to or larger than the bore of the tube fitted in the
pumphead. When pumping viscous fluids, the losses caused by increased friction can be overcome by
using pipe runs with a cross sectional area several times greater than the pumping element.
DO run at a slow speed when pumping viscous fluids.
DO fit an extra length of pump tube in the system to enable tube transfer. This will extend tube life and
minimise the downtime of the pumping circuit.
DO keep the track and rollers clean.
The self-priming nature of peristaltic pumps means valves are not required. Any valves fitted must cause no
restriction to flow in the pumping circuit.
When using Marprene tubing After the first 30 minutes of running, re-tension the tube in the pumphead by
releasing the track latch and pulling the tubing on the delivery side a little. This is to counteract the normal
stretching that occurs with Marprene which can go unnoticed and result in poor tube life.
Tube selection The chemical compatibility list published in the Watson-Marlow catalogue is only a guide.
If in doubt about the compatibility of a tube material and the duty fluid, request a tube sample card for
immersion trials.
Troubleshooting
If the pump fails to operate, make the following checks to determine whether or not servicing is required.
• Check the mains supply is available at the pump (green LED).
• Check the fuse in the mains socket (where fitted).
• Check that the pump is not stalled by incorrect fitting of tubing.