Watson-Marlow 624Di - Manual (Page 3)

Watson-Marlow Bredel E-Manuals
http://www.watson-marlow.it/pdfs-global/m-624Di-gb-01.htm[10/07/2012 13:59:15]
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 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. Open the guard, hold the tubing at one port whilst pulling the tube tight
through the second port. 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.
Installation
The 624Di is suitable for single-phase mains electricity supplies only.
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.
Remove the small transparent plate on the rear panel to gain access to the voltage
selector and terminal block.
Set the voltage selector to either 120V for 100-120V 50/60Hz single-phase AC
supplies or 240V for 220-240V 50/60Hz single-phase AC supplies.
Route the mains supply cable through the entry point to the right of the recess, and
couple the cable to the terminal block as shown on the rear panel.
There are two alternative connectors. One accepts 20mm rigid or flexible conduit,
and the other accepts three core 0.75 square millimetre PVC sheathed mains cable
(via the screwed adapter supplied) so that a mains lead can be used.
Ensure that the mains lead is securely retained in the strain relief gland so that IP55
ingress protection is maintained.
Securely replace the transparent plate and the gasket over the recess.
1. Armoured cable strain relief gland GR 0018
2. Washer GR 0019
3. Strain relief gland SL0020
Ingress protection standard will be compromised if the transparent plate
is not replaced.
Rear panel recess
The pump rear panel recess houses the following:
1. Fuse holder
2. Terminal block
3. Voltage selection switch