Watson-Marlow 403U - Manual (Page 3)

3
Installation
 The 403U and 405U drives are suitable for single phase mains electricity supplies only.
 The pumps are supplied with a mains cable fitted with a moulded plug. The wires are colour coded in accordance
with the following code:
220-240V: Live- Brown; Neutral - Blue; Earth - Green/Yellow.
100-120V: Live - Black; Neutral - White; Earth - Green.
 403U and 405U drives with product codes ending in "U" (UK mains cable) and "E" (European mains cable) accept
230V, 50/60Hz only, whereas pumps with product codes ending in "A" (American mains cable) accept 110V,
50/60Hz single phase mains voltage.
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 continuous lengths of 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
Should the pump fail to operate, make the following checks to determine whether or not servicing is required.
 Check that mains supply is available at the pump.
 Check the mains supply fuse.
 Check that the pump is not stalled by incorrect fitting of tubing.
Manual operation
 Change the set speed by pressing the  or  key. Pump speed is displayed in percentage of maximum speed.
The 403U has a speed control ratio of 20:1. This will give a minimum speed of 0.5rpm for the 10rpm 403U drive
and 2.5rpm for the 50rpm 403U. The 405U has a speed control ratio of 10:1. This will give a minimum speed of
20rpm for the 200rpm 405U drive.
 Start the pump or change rotor running direction by pressing the  (clockwise rotation) or the  (counter
clockwise) key. Stop the pump by pressing the Stop key. The direction of rotation of the rotor, or a stopped rotor,
is indicated by the illumination of the LED above the
, Stop and  keys.
 For maximum speed priming press the Max key.
 If power is cut to the pump at the mains supply when under manual control, after power is reconnected the pump
will remain stopped.
 If returning from auto control to manual control, disconnect the process signal from the pump.