When this pump unit is used as a stand-alone pump it complies with: Machinery
Directive 2006/42/EC, EMC Directive 2004/108/EC.
2 Declaration of incorporation
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 2006/42/EC.
Watson-Marlow Limited warrants, subject to the conditions below, through either WatsonMarlow Limited, its subsidiaries, or its authorised distributors, to repair or replace free of
charge, including labour, any part of this product which fails within two 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 WatsonMarlow 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 Watson-Marlow Limited, its subsidiaries, or its distributors,
which do not accord with the terms of this warranty shall not be binding upon WatsonMarlow Limited unless expressly approved in writing by a Director or Manager of WatsonMarlow Limited.
4 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.
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.
This symbol, used on the pump and in this manual, means: Caution, risk
of electric shock.
This symbol, used on the pump and in this manual, means: Caution, refer
to accompanying documents.
This symbol, used on the pump and in this manual, means: Do not allow
fingers to contact moving parts.
Fundamental work with regard to lifting, transportation,
installation, starting-up, maintenance and repair should be
performed by qualified personnel only. Make absolutely sure
that no voltage is applied at all whilst work is being carried
out on the geared motor. The motor must be secured against
accidental start.
Do not build a pump into a tight location without adequate airflow around the pump.
Do not strap the control and mains power cables together.
Do keep delivery and suction tubes as short and direct as possible - though ideally not
shorter than 1m - and follow the straightest route. Use bends of large radius: at least four
times the tubing diameter. Ensure that connecting pipework and fittings are suitably rated
to handle the predicted pipeline pressure. Avoid pipe reducers and lengths of smaller bore
tubing than the pumphead section, particularly in pipelines on the suction side. Any valves
in the pipeline (not usually needed) must not restrict the flow. Any valves in the flow line
must be open when the pump is running.
Do use suction and delivery pipes equal to or larger than the bore of the tube in the
pumphead. When pumping viscous fluids use pipe runs with a bore several times larger
than the pump tube.
Do ensure that on longer tube runs at least 1m of smooth bore flexible tubing is connected
to the inlet and discharge port of the pumphead to help to minimize impulse losses and
pulsation in the pipeline. This is especially important with viscous fluids and when
connecting to rigid pipework.
Do site the pump at or just below the level of the fluid to be pumped if possible. This will
ensure flooded suction and maximum pumping efficiency.
Do keep the pumphead track and all moving parts clean and free from contamination and
debris.
Do run at slow speed when pumping viscous fluids. Flooded suction will enhance pumping
performance in all cases, particularly for materials of a viscous nature.
When using Marprene or Bioprene continuous tubing, do re-tension the tube after the
first 30 minutes of running.
Tube selection: The chemical compatibility lists published in Watson-Marlow publications
are guides. If in doubt about the compatibility of a tube material and the duty fluid, request
a Watson-Marlow tube sample card for immersion trials.
Site the pump on a flat, horizontal, vibration-proof surface allowing a free flow of air around
it. Ensure there is 0.5m of straight tubing before the pumphead inlet and after the
pumphead outlets. Close coupled simplex pumps will require bolting down with four M8
bolts through the gearbox foot mounting holes.
AC motor
Ensure that mains voltage/frequency are in accordance with motor nameplate
information.
Secure protective conductor connections.
If a three-phase motor is running in the wrong direction, interchange any two
phases.
Close unused cable entrance holes and the terminal box itself in a dust and
watertight manner.
A current overload relay should be fitted to a contact breaker. Connect the motor in
accordance with the wiring diagram which will be found in the motor terminal box.
When a thermal protection switch is fitted in the motor, the leads will be found in the
motor terminal box. They should be connected to stop the pump if the switch
operates. The switch will open circuit at an over temperature condition. See below for
the connection of the drive motor showing possible ancillary switches and
protections.
The ancillary switches are rated to 220/240V 1ph 50Hz. The Start contact should have a
sprung return which will disengage following energisation of the coils C1 and C1/1.
Ensure that an emergency stop switch is fitted within reach of the pump.
Do not under any circumstances wire switches directly across any of the
phases of a three-phase supply. If in doubt disconnect the pump
immediately!
Do not connect ancillary switches to the terminal box of a flameproof
motor unless the switch has a suitable Exd rating for the zone area in
which it is to be mounted.
Wiring diagram for fixed speed motor fitted with guard switch option
Before starting and after prolonged storage of the gear units, remove the plug from the
vent screw on top of the casing to avoid excessive pressure in the gearbox, which may
cause leakage at the shaft seals.
9 Troubleshooting
Should the pump fail to operate, make the following checks to determine whether or not
servicing is required.
Check the electrical supply is available at the pump.
Check that the pump is not stalled by incorrect fitting of tubing.
If the pump is fitted with an electrical guard switch option: press the reset button
after the pumphead guard has been closed.
Always check to ensure that an Exd motor gearbox is suitably rated for
the hazardous zone area in which it is to be mounted. Exd motors should
only be installed by Exd qualified personnel.
Any deviation from normal operating conditions (increased power
consumption, temperature, vibrations, noise) or warning signals by
monitoring equipment suggest malfunction. Inform the responsible
maintenance personnel at once to prevent the trouble from
worsening. If in doubt disconnect the pump immediately.
10 AC motor maintenance
Remove any dust deposits from the fan cover to avoid overheating.
Ensure that the bearing cage is packed to about 1/3 with evenly distributed
lubricating grease.
Select the correct lubricating grease from the table in the back of this operating
instruction.
11 Gearbox maintenance - Simplex (single
pumphead) units
Change lubricant every 10,000 working hours or after 2 years.
Combine a lubricant change with a thorough cleaning of the gear unit.
Extreme working conditions (high air humidity, aggressive media and large
temperature variations) will reduce the interval between lubricant changing intervals.
Select the correct lubricating oil from the table in the back of this operating
instruction.
12 Gearbox maintenance - Duplex (twin
pumphead) units
The gearbox is filled for life with synthetic lubricant so no maintenance is required.
13 Varmeca drives
Varmeca drives: overview
The Varmeca drive is an IP65 integrated electronically-variable speed drive fitted to a
standard enclosure IP55 motor gearbox. Standard Varmeca drives are single-phase but
three-phase Varmecas are available.
Standard Varmeca drives are set up for manual control with the run command enabled.
Current will be applied directly to the motor as soon as mains power is switched on.
Subsequently, speed, direction of rotation and stop control can be achieved from the control
knob and keypad.
For information on how to set up the Varmeca for remote control, please refer to
the Leroy Somer Varmeca-30 manual.
This Varmeca-30 must be connected to an approved earth terminal.
It is imperative that the equipment is powered via an isolating
device and a circuit-breaking device (power contactor) which can
be controlled by an external safety system (emergency stop, fault
detector).
The Varmeca-30 is fitted with safety devices which stop the motor in the event of a fault.
The motor can become jammed for mechanical reasons. Voltage fluctuations and power
cuts may also stop the motor.
Removing the cause of a shutdown can lead to restarting, which may be dangerous for certain installations. It is essential that the user guards against the motor restarting after
shutdown, if this is undesirable.
13.1 Varmeca drives: installation
The standard Varmeca integrated drive requires no connection other than to the mains
power supply.
The Varmeca motor fan cools the whole unit. Make sure that the ventilation air inlet is
free of obstruction.
It is the responsibility of the owner or user to ensure that the installation, operation and
maintenance of the inverter complies with health and safety regulations of the relevant
country of use.
Before carrying out any work, disconnect and lock the drive power
supply. For single phase units, wait two minutes to make sure that
the capacitors have fully discharged. After connection work, make
sure that the seals are firmly in place, and the screws and cable
glands are watertight to ensure IP65 protection. Clear any
condensation from the drain holes at the bottom of the motor.
13.2 Varmeca drives: connections
The voltages on the power terminal blocks and the cables connected to them may cause
fatal electric shocks. The drive stop function does not protect against these high
voltages.
The drive power supply must be protected against overloads and short circuits.
It is vital to respect the rating of protection devices.
Connections should be made with copper conductors only.
13.3 Varmeca drives: cables and protection devices
Circuit breakers must be of the D-curve type suitable for a motor with an inverter.
Comply with the size of protection (gl) fuses given in the table below.
The cable size may vary according to legislation applicable in the country of use, which
will take precedence over the values given in the table below without exception.
PowerVMA
230V/1/50/60Hz
110V/1/50/60Hz
0.37kW
1/2HP
0.37kW
1/2HP
rating
A
21M-037
A
22M-037
Current
(A)
gl fuses or circuit
breaker (A)
4101.5
9162.5
Cable
(sq mm)
NB: The mains current value is a typical value which depends upon the source impedance.
The higher the impedance, the lower the current. The fuses (UL approved) are intended for
installations capable of delivering 5,000A maximum at 480V.
13.4 Varmeca drives: commissioning / start-up
Remove the cover and connect a suitably rated mains cable via the cable gland to
connection points L1, L2, L3 and PE (earth) of the Varmeca terminal block.
Secure the connection cover and cable gland into position, ensuring that the IP65 sealing
is not compromised.
The Varmeca must not be switched on with the connection cover
removed.
The motor Run command has been enabled: the motor will start as
soon as it is switched on.
Power-up at the mains: the green indicator lamp lights and remains on continuously.
Start rotation by pressing a direction button for one second.
Set the speed reference using the side control knob, adjusting speed between 10Hz and
80Hz. The speed control knob is calibrated in percentages of maximum speed.
Press the Stop button to stop the unit.
Varmeca drives fitted with the electrical guard switch option
Commissioning / start-up: as standard Varmeca units.
If the guard switch is activated:
Press the Stop button to reset the unit after the pumphead guard has been closed
Re-start rotation by pressing a direction button for one second
Note: For single-phase standards, the power supply is connected to terminals L and N.
Before switching on the Varmeca-30 motor, check that
electrical connections are correct and that any moving parts
are mechanically protected. The Varmeca-30 must not be
switched on with the protective cover removed.
For information on each parameter and its options, consult the Leroy-Somer Varmeca-30
operating instructions.
13.9 Varmeca care and maintenance
emperature variations and excessive humidity encourage the formation of condensation.
If this occurs, the condensation drain plugs at the bottom of the motor should be
removed, even in a very humid atmosphere.
No specific servicing is required for Varmeca-30 motors, apart from regularly removing
dust from the fan grille and the cooling fins at the bottom of the unit.
Dismantling the Varmeca-30 while it is under warranty will invalidate the warranty.
The air motor is designed for air only. Do not allow corrosive,
flammable or explosive gases or particulate material to enter the
motor. Water vapour, oil-based contaminants, or other liquids must
be filtered out. The recommended air pressure should not exceed
100 PSIG maximum.
Always disconnect the air supply before servicing.
Installation
A muffler is supplied with the air motor, but not installed. Install a moisture trap and filter
in the air line ahead of the motor. If condensates need to be flushed out of the motor, use
clean, dry air at low pressure. For efficiency of output and speed control, use air lines of the
same size or next pipe size larger than the intake port of the motor. A four-way valve which
can be connected by piping to both air ports of the motor will make reversing possible. Use
a pressure regulator or a simple shut-off valve to obtain desired power and conserve air to
regulate speed and torque.
Lubrication
Use a detergent SAE #10 automotive engine oil. Lubrication is necessary for all moving
parts and rust prevention. We recommend that an automatic air lubricator be installed in
the air line just ahead of the motor. The lubricator should be adjusted to feed one drop of
oil for every 50-75 CFM of air going through the motor.
Manual lubrication Add 10-20 drops of oil every eight hours of operation through
the inlet port while the pump is shut down.
Automatic lubrication An In-line oiler should be adjusted to feed one drop per
minute for high speed or continuous duty use. Do not overfeed oil as contamination
of the exhaust air may occur.
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 WatsonMarlow Technical Support Centre.
Before opening the pumphead guard please ensure that the
following safety directions are followed.
For close-coupled drives, ensure that the pump is isolated from mains voltage.
Ensure that there is no pressure in the pipeline.
If a tube failure has occurred, ensure that any product in the pumphead has been
allowed to drain through the controlled waste to a suitable drain.
Ensure that protective clothing and eye protection are worn if hazardous products are
being pumped.
17 620RE, 620RE4 and 620R Safe-guarding
Primary safety on 620 series pumps is provided by the tool-lockable pumphead
guard. On electrically-powered cased 600 series pumps, secondary (backup)
protection is provided in the form of an electrical interlock which stops the pump if
the pumphead guard is opened (and only for so long as the guard is opened). The
electrical interlock on cased pumps should never be used as primary protection.
Always disconnect the mains power supply to the pump before opening the
pumphead guard.
Only primary protection through the tool-lockable guard is provided on pneumatically
powered 621 close-coupled pumps.
Primary protection through the tool-lockable pumphead guards is provided as
standard on 621 series industrial AC motors. Secondary (backup) protection is
available in the form of an electrical interlock which stops the pump if the pumphead
guard is opened (and only for so long as the guard is opened). The electrical interlock
on close-coupled pumps should never be used as primary protection. Always
disconnect the mains power supply to the pump before opening the pumphead
guard.
18 620RE, 620RE4 and 620R Pumping conditions
Pressure and viscosity
All pressure values in this operating instruction, from which performance and life
figures have been calculated relate to peak pipeline pressures.
Although rated to 4 bar working pressure, this pump will generate in excess of 4 bar
working pressure if pipeline restrictions are in place. In instances where it is critical
that a working pressure of 4 bar is not exceeded, pressure relief valves should be
installed in the pipeline.
For pumping duties of 2-4 bar pressure, use standard STA-PURE tube elements or 73
Shore hardness Marprene/Bioprene. "TM" in the tube element’s product order code
denotes suitability for this pressure.
To maintain performance at pressures above 2 bar, avoid running the pumphead
below 50 rpm. If low-flow, high-pressure operation is necessary, switching to a
smaller tube is recommended.
When pumping duties of 0-2 bar pressure, use 64 Shore hardness elements or the
standard range of continuous peristaltic pump tubing.
Viscosity handling is maximised by using 73 Shore hardness Marprene/Bioprene or
STA-PURE tube elements in the pumphead.
Ensure that there is always a minimum of one metre of smooth bore flexible tubing
connected to the discharge port of the pumphead. This will help minimise any
impulse losses and pulsation in the pipeline. This is especially important with viscous
fluids and rigid pipework.
A correctly engineered installation will promote the best possible tube life, so please ensure
that the following guidelines are followed:
Avoid tight pipeline bends, pipe reducers and excessive lengths of smaller bore
tubing than that in the pumphead, particularly in pipelines on the suction side.
Ensure that connecting pipe work and fittings are suitably rated to handle the
predicted pipeline pressure.
If rigid pipework comes in close proximity to the pumphead, a drop-out section of
pipework will simplify tube replacement. When using element pumpheads, ensure
that a minimum of 1m of flexible interface pipework is connected between the
pumphead and any rigid pipework.
Ensure that the controlled waste blanking plug is in position if the controlled waste
port is not in use. See below.
It is advisable to use controlled waste pipe work if pumping hazardous, aggressive or
abrasive fluids or products which will harden in contact with air.
When connecting waste pipe work to the controlled waste port using the coupling
adaptor supplied, ensure that there is adequate clearance underneath the pumphead.
Waste pipe work should run to a suitable container or drain.
The leak detector installation procedure is included in the leak detector kit.
If unsure of an installation please contact your local Watson-Marlow Technical
Unlock the guard with a 5mm Allen key or a screw driver.
Open the guard to its full extent. This creates the maximum clearance between the
tube ports and guard to remove the tubing.
Engaging/disengaging the rollers
The extent of travel of the roller release levers is indicated below. Do not try and
force the levers beyond their normal extent of travel as this will damage the rotor.
To engage the rollers snap the roller release levers counter clockwise making sure
that the rollers locked out against the tubing. To disengage the rollers, snap the
release levers clockwise to their disengaged position. For high pressure tubing
elements or four roller pumpheads, the 5mm Allen key can be used to aid leverage
when engaging/disengaging the rollers with the release levers.
Make sure that fingers are clear of the front face of the rotor hub
when using the roller release levers.
Pre-load checks
Before loading tubing, ensure that all rollers rotate freely, that the tube ports and
location grooves are clean and that if in use, the controlled waste pipe work is free of
any obstructions.
Closing the pumphead guard and start-up
Ensure that the guard seal is clean, replacing it if necessary.
Ensure that the rollers are engaged and locked out against the tubing
Close the guard and push it against the track until the latch engages.
Connect suitable pipe work to the pumphead using the appropriate connectors for the
tube element.
Continuous tubing clamp location in 620R pumpheads
Select the appropriate tube clamp set for the tubing size to be used.
Locate the two "U"-shaped track clamp halves into the pumphead ports (The "U"-
shape ensures correct loading)
Locate the corresponding guard clamp halves which have raised "T" locating sections,
into the slots on the inner guard face above and below the guard hinge. Push and
slide into their locked position.
Closing the guard will align the two halves of the clamp around the tubing.
620R continuous tubing pumpheads are factory set to accept Watson-Marlow 600
series 3.2mm wall tubing. Pumping performance will be adversely affected if WatsonMarlow tubing is not used.
Select the tube clamp set which is correct for the tubing size to be used.
Disengage rollers
Locate one end of the tubing into the lower port "U" clamp and hold in position.
Wrap the tubing tightly around the retracted rollers, making sure that there is no
twisting through its length.
Locate the other end of the tubing into the upper port "U" clamp.
Hold both ends of the tubing in one hand maintaining tension around the rollers.
Engage rollers
Close the guard and push it against the track until the latch engages
Ensure that continuous tubing is not loosely clamped at the pumphead ports.
Ensure that when the pump is re-started all of the rollers have re-engaged. A roller
which has not re-engaged will "click" continuously. No damage will occur if this
happens but the roller should be re-engaged manually using the 5mm Allen key.
Please refer to the Troubleshooting section.
23 620RE, 620RE4 and 620R Tube element or
continuous tube removal
Unlock the guard and disengage the rollers.
Disconnect the tubing from the external pipeline.
Remove the tubing from the pumphead.
24 620RE, 620RE4 and 620R Maintenance
Scheduled maintenance
The stainless steel pumping rollers run on sealed bearings and do not require
lubrication.
Remove the rotor and lubricate the follower rollers and roller engaging mechanisms
with a lithium-based grease. This should be carried out every six months for
intermittent duties and every three months for 24 hour duties.
If fluid is spilled inside the pumphead, flush the pumphead out with water and mild
detergent as soon as possible. If specific cleaning agents are required to clean the
spillage, please consult Watson-Marlow Technical Support Office before proceeding,
in order to confirm chemical compatibility.
If the rotor needs to be removed, refer to the guidelines below.
Roller adjustment
620 pumpheads have provision for adjustment to reset the roller/track gap to compensate
for wear after extended service in arduous applications.
Roller/track gaps can only be accurately judged without tubing in the pumphead. The gap
should be 5.2mm for 3.2mm wall tubing and 6.2mm for LoadSure elements.
If the gap is more than 0.2mm greater than these dimensions, the following may be carried
out:
Note the number on the roller arm to which the engraved line on the hexagon-
headed main roller pin corresponds.
Remove the circlip (snap-ring) and roller pin.
Relocate the main roller pin, resetting the engraved line to one number lower. For
example, if the engraved line was at "-1", reset it to "-2" to reduce the roller track
gap.
Ensure the roller pin is correctly seated into the roller arm thrust washer. Replace the
circlip.
Rotor removal and re-location
Remove the rotor cover and central locating bolt using a 5mm Allen key. Pull the
rotor off the keyed shaft, remove the key and clean thoroughly. Do not use tools to
lever the rear face of the rotor away from the inner face of the track, it should come
off by hand.
To replace the rotor, locate the key into the keyway and apply a thin layer of grease
over the shaft and key. Align the keyway of the rotor to the shaft key and slide the
rotor into position, ensuring that a positive "stop" is achieved and ensure that the full
length of the drive shaft is fitted into the rotor.
Do not force the rotor into position. The rotor will slide into place easily if correctly
aligned.
Tighten the hexagonal locating bolt to a nominal torque of 10Nm using a 5mm Allen
key.
The rotor bolt, which is impregnated with "Loctite 218" thread lock, should be
subjected to a maximum of three removals/relocations before renewal. To avoid rotor
bolt renewal after three removals, apply "Loctite 222" thread lock to the rotor thread
before relocation. This is critical to ensure prolonged, secure location of the rotor hub
to the drive shaft. Failure to complete this action will invalidate the terms and conditions of the pumphead warranty.
Replace the rotor cover.
When closing the guard, check it does not make contact with the rotor. If it does, then the
rotor has been fitted incorrectly. Re-open the guard, remove and refit the rotor, and close
the guard.
Track removal (close coupled AC motor gearboxes)
Remove the rotor.
Disconnect the controlled waste pipework if attached.
Loosen the four track retaining screws using a Number 2 Pozi-Driv screwdriver.
Disconnect the mains interlock if connected to a mains contactor
Note: Flow rates quoted have been rounded for simplicity, but are accurate to within 5% well within the normal tubing-tolerance variation of flow rate. They should therefore be
taken as a guide. Real flow rates in any application must be determined empirically.
Watson-Marlow, Loadsure, Bioprene and Marprene are trademarks of Watson-Marlow
Limited.
TYGON is a trademark of the Saint Gobain Performance Plastics Company.
STA-PURE is a trademark of W L Gore and Associates.
The information contained in this document is believed to be correct but Watson-Marlow
Limited accepts no liability for any errors it contains, and reserves the right to alter
specifications without notice.
33 Patient-connected use: warning
Warning, These products are not designed for use in, and should not be used for patient
connected applications.
34 Publication history
m-621cc-gb-01.htm: Watson-Marlow 621CC.
First electronically published 11 02.
m-621cc-gb-02.htm: Watson-Marlow 621CC.
First electronically published 12 04. Revised 06 06.
m-621cc-gb-04.htm: Watson-Marlow 621CC.
First electronically published 01 11.
In compliance with the UK Health and Safety at Work Act and the Control of Substances
Hazardous to Health Regulations, you are required to declare the substances which have
been in contact with product(s) you return to Watson-Marlow or its subsidiaries or
distributors. Failure to do so will cause delays. Please ensure that you fax us this form and
receive an RGA (Returned Goods Authorisation) before you despatch the product(s). A copy
of this form must be attached to the outside of the packaging containing the product(s).
Please complete a separate decontamination certificate for each product.
You are responsible for cleaning and decontaminating the product(s) before return.
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To speed the repair, please
describe all known faults
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with product(s)
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handling these chemicals
Company
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If the product has been used, please complete all the following sections. If the product has
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event of human contact
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Please print out, sign and fax to Watson-Marlow Pumps at +44 1326 376009.