Watson-Marlow 504S User Manual

504S

504s-gb-03.pdf

Declarations

98/37/EC EN60204-1, Low Voltage Directive 73/23/EEC EN61010-1, EMC Directive 89/336/EEC

Declaration of
conformity

Declaration of
Incorporation

Responsible person: Dr R Woods, Managing Director, Watson-Marlow Limited, Falmouth, Cornwall TR11 4RU, England.
Telephone [phone], Fax [phone].

When this pump unit is used as a stand alone pump it complies with: Machinery Directive
EN50081-1/EN50082-1.

When this pump unit is to be installed into a machine or is to be assembled with other
machines for installations, it must not be put into service until the relevant machinery has been
declared in conformity with the Machinery Directive 98/37/EC EN60204-1.

Three year warranty

Watson-Marlow Limited warrants, subject to the conditions below, through either Watson-Marlow Limited, its subsidiaries, or its
authorised distributors, to repair or replace free of charge, including labour, any part of this product which fails within three years
of delivery of the product to the end user. Such failure must have occurred because of defect in material or workmanship and not
as a result of operation of the product other than in accordance with the instructions given in this manual.

Conditions of and specific exceptions to the above warranty are:

• Consumable items such as tubing and rollers are excluded.

• Products must be returned by pre-arrangement carriage paid to Watson-Marlow Limited, its subsidiaries, or its authorised

distributor.

• All repairs or modifications must have been made by Watson-Marlow Limited, its subsidiaries, or its authorised distributors

or with the express permission of Watson-Marlow Limited, its subsidiaries, or its authorised distributors.

• Products which have been abused, misused, or subjected to malicious or accidental damage or electrical surge are

excluded.

Warranties purporting to be on behalf of Watson-Marlow Limited made by any person, including representatives of Watson­Marlow Limited, its subsidiaries, or its distributors, which do not accord with the terms of this warranty shall not be binding upon
Watson-Marlow Limited unless expressly approved in writing by a Director or Manager of Watson-Marlow Limited.

Information for returning pumps

Equipment which has been contaminated with, or exposed to, body fluids, toxic chemicals or any other substance hazardous to
health must be decontaminated before it is returned to Watson-Marlow or its distributor.

A certificate included at the rear of these operating instructions, or signed statement, must be attached to the outside of the
shipping carton.

This certificate is required even if the pump is unused. If the pump has been used, the fluids that have been in contact with the
pump and the cleaning procedure must be specified along with a statement that the equipment has been decontaminated.

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 dangerous voltages (at mains potential) inside the pump. If access is required, isolate

the pump from the mains before removing the cover.

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. When using the 501RL pumphead, a 4.8 or 6.4mm bore tube with a

1.6mm wall will give best results. Tube smaller than this will generate a high friction pressure loss, so reducing the flow. Tube
with a larger bore will not have sufficient strength to restitute. Flooded suction will enhance pumping performance in all cases,

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particularly for materials of a viscous nature. Silicone and Marprene tubing is available with 2.4mm wall thickness for speeds up
to 200rpm.

DO keep the track and rollers clean.
DO fit an extra length of pump tube in the system to enable tube transfer. This will extend tube life and minimise the down time

of the pumping circuit.
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 or Bioprene tubing, after the first 30 minutes of running, re-tension the tube in the pumphead by

releasing the tube clamp on the delivery side a little and pulling the tube tight. This is to counteract the normal stretching that
occurs with Marprene and Bioprene, which can go unnoticed and result in reduced 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 504S/RL 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 switch 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.

• The cable entry accepts three core 0.75 square millimetre PVC sheathed mains cable (via the screw adaptor 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 Power cable 5-8mm O.D. (outside diameter)
2 Strain relief gland SL 0020
3 Adaptor MR0678T
4 M20 Conduit thread for direct conduit connection, through back panel

Ingress protection standard will be compromised if fittings are not correctly replaced.

Rear panel recess

The pump rear panel recess houses the following:
1 Fuse holder 2 Terminal block 3 Voltage selection switch

Troubleshooting

Should the unit fail to operate, make the following checks to determine whether or not servicing is required.

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• Check that the power switch is on.

• Check the mains supply is available at the pump unit.

• Check the voltage selector switch is in the correct position.

• Check the fuse in the mains socket.

• Check that the pump is not stalled by incorrect fitting of tubing.

Manual operation

• Start up direction Start the pump by turning the Forward/Off/Reverse switch to the required direction of rotation. The

preferred direction of rotation is clockwise (with fluid entering at the bottom of the right of the pumphead), which will ensure
the longest possible tube life. To operate against higher pressures, use anticlockwise rotation.

• Prime To prime the pump at maximum speed turn the Auto/Manual/Max switch on the front panel to its Max position.

When released the switch will return to its Manual position.

• Speed control The speed setting dial is calibrated in percentage of maximum speed and has a locking knob to prevent

accidental speed changes.

• Stop Stop the pump by turning the Forward/Off/Reverse switch to its central Off position. To change the direction of flow,

turn the Forward/Off/Reverse switch to its central Off position until the pumphead rotor stops, and turn it to the required
direction of rotation.

If returning from auto control to manual control, it is not necesssary to disconnect the process signal from the pump or adjust the
calibration potentiometers.

Care and maintenance

The only scheduled maintenance of the pump unit is to inspect the motor brushes and to replace them before their length is less
than 10mm. The life of the brushes depends on the duty of the pump but is expected to be at least 4,000 hours at maximum
speed.

If the pump requires cleaning use a mild solution of detergent in water after removing the pumphead. Do not use strong solvents.
For gearbox rebuilds, use 15ml of the recommended lubricant RD-105. This is a SAE 30 mineral oil loaded with molybdenum

disulphide to form a soft fluid grease.

Specification

Maximum rotor speed 55rpm, 220rpm
Shaft torque 2.2Nm
Control range 100:1
Voltage/frequency 100-120/220-240V 50/60Hz
Power consumption 100VA
Operating temperature range 5C to 40C
Storage temperature range -40C to 70C
Noise <70dB(A) at 1m
Weight 8.0kg
Standards IEC 335-1, EN60529 (IP55)

Machinery Directive 98/37/EC EN60204-1

Low Voltage Directive 73/23/EEC EN61010-1

EMC Directive 89/336/EEC EN50081-1/EN50082-1

Specific drive performance details such as loaded drive speed variation against mains supply voltage fluctuation and drive
stability from a cold start to normal operating temperature are available on request. For further information please contact
Watson-Marlow Technical Support Department.

501RL Pumphead

The 501RL pumphead has two spring-loaded working rollers, which automatically compensate for minor variations in tubing
wall thickness, giving extended tube life. The 501RL is set during manufacture to accept tubing with wall thicknesses of between

1.6mm and 2.0mm, and internal diameters of up to 8.0mm. It is equipped with a "tool lockable" guard for increased safety. This
should be locked shut whilst the pump is in use.

The pumphead can be run clockwise for extended tube life, or anti-clockwise to operate against higher pressures.

Flow rates

Flow rates for the 504S were obtained using silicone tubing with the pumphead rotating clockwise, pumping water at 20C with
zero suction and delivery pressures. For critical applications determine flow rates under operating conditions.

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