WATSON-MARLOW 323S (01) PDF DOCUMENT

When you unpack your WATSON-MARLOW 323S pump, you will find the following components:

• Dedicated 323S pump drive unit fitted with one or more 313 or 314 pumpheads.

• The designated mains power lead for your pump.

• Compliance documentation.

• Safety information documentation.

Note: Some versions of this product may include different components. Please check against your purchase order.

The WATSON-MARLOW 323S pump has an extended shelf life. However, after storage, care should be taken to ensure all parts function correctly. The pump contains a battery with an unused life of seven years. Long-term storage is not recommended for peristaltic pump tubing. Please observe the storage recommendations and use-by dates for any tubing you plan to use after storage.

The WATSON-MARLOW 323S is a peristaltic pump, which is the simplest type of pump with no valves, seals, or glands to clog or corrode. The fluid only contacts the bore of the tube, eliminating contamination risks.

Here is how it works:

1. A compressible tube is squeezed between a roller and a track, creating a seal.

2. As the roller moves along the tube, the seal advances. After the roller passes, the tube returns to its original shape, creating a partial vacuum that draws fluid from the inlet port.

3. Before the first roller reaches the end of the track, a second roller compresses the tube at the start, isolating a packet of fluid.

4. As the first roller leaves the track, the second roller continues to advance, pushing the fluid packet out through the discharge port. At the same time, a new vacuum is created behind the second roller, drawing in more fluid.

This process prevents backflow and siphoning, and the pump effectively seals the tube when it is inactive, eliminating the need for valves.

For safe operation of the WATSON-MARLOW 323S pump, please adhere to the following safety notes:

• Only competent, suitably trained personnel who have read and understood the manual should use the pump.

• The unit must be isolated from mains power while any fundamental work such as installation, maintenance, and repair is being carried out.

• The pump’s mains plug is the disconnecting device in an emergency. Do not position the pump where it is difficult to disconnect the mains plug.

• Do not fit any devices to the drive unit other than those tested and approved by Watson-Marlow.

• If pumping hazardous fluids, implement safety procedures specific to that fluid to protect against injury.

• The exterior surfaces may get hot during operation. Let the pump cool after use before handling it.

• Do not run the drive without a pumphead fitted.

• This product does not comply with the ATEX directive and must not be used in explosive atmospheres.

The safety symbols have the following meanings:

• Exclamation mark in a triangle: Caution, refer to accompanying documents.

• Hand with crossed out fingers: Do not allow fingers to contact moving parts.

• Wheelie bin with a cross: Recycle this product under the terms of the EU Waste Electrical and Electronic Equipment (WEEE) Directive.

• Exclamation mark in a triangle with entanglement symbol: There is a user-replaceable type T1.0AH 250V fuse in the fuse drawer of the IEC mains connector at the back of the pump, which also contains a spare fuse. There are no other user-serviceable fuses or parts inside this pump.

• Exclamation mark in a triangle with a person lifting: Fundamental work with regard to lifting, transportation, installation, starting-up, maintenance and repair should be performed by qualified personnel only. The unit must be isolated from mains power while work is being carried out.

Before opening the pumphead track, ensure the following safety directions are followed:

• Ensure that the pump is isolated from the mains power.

• Ensure that there is no pressure in the pipeline.

• If a tube failure has occurred, ensure that any fluid in the pumphead has been allowed to drain to a suitable vessel, container or drain.

• Ensure that protective clothing and eye protection are worn if hazardous fluids are pumped.

The WATSON-MARLOW 323S features are detailed in the table below:

For good pump installation practice and to promote long tube life, follow these recommendations:

• Position: Site the pump on a flat, horizontal, rigid surface, free from excessive vibration. Allow air to flow around the pump for heat dissipation and ensure the ambient temperature does not exceed 40C.

• Emergency disconnection: The mains plug is the disconnecting device. Do not position the pump where it is difficult to unplug. The STOP key on the keypad will always stop the pump, but a suitable local emergency stop device fitted into the mains supply is recommended.

• Valves: Peristaltic pumps are self-priming, so no valves are needed in inlet or discharge lines. Any valves in the process flow must be open before the pump operates. A pressure relief device is advised between the pump and any discharge side valve to protect against accidental operation with the valve closed.

• Tubing materials run-in advice: Sta-Pure and Marprene tubing are hard to compress when new. When using these materials, the pump should be run at a speed of 10 rpm or greater for the first 30 seconds. Running slower may cause the safety system to stop the pump and display an over-current error message.

Do:

• Observe precautions for reducing electrostatic charge, such as ESD protective workwear.

• Operate the pump on a flat horizontal surface with free airflow for cooling. Do not block air vents.

• Use only single phase mains electricity supplies.

• Keep delivery and suction tubes as short and direct as possible (ideally not shorter than 1m). Use bends with a large radius (at least four times the tubing diameter).

• Ensure connecting pipework and fittings are suitably rated for the predicted pressure.

• When pumping viscous fluids, use pipe runs with a bore several times larger than the pump tube.

• Ensure at least 1m of smooth bore flexible tubing is connected to the inlet and discharge ports to minimize pulsation, especially with viscous fluids or rigid pipework.

• Site the pump at or just below the fluid level to ensure flooded suction.

• Keep the pumphead track and moving parts clean.

• Run at slow speed when pumping viscous fluids.

• Recalibrate after changing pump tubes, fluid, or connecting pipework.

• When using Marprene or Bioprene continuous tubing, re-tension the tube after the first 30 minutes of running.

Do not:

• Do not stack pumps more than three high.

• Do not block air vents beneath the pump or at the rear.

A well-regulated electrical mains supply is required. Follow these steps to connect your WATSON-MARLOW 323S pump:

1. Locate the voltage selector mounted in the switchplate at the rear of the pump.

2. Set the voltage selector to 115V for 100-120V 50/60Hz supplies or 230V for 200-240V 50/60Hz supplies. Always check the selector switch before connecting the mains supply.

3. Make a suitable connection to an earthed, single-phase mains electricity supply. The mains plug must be a separable plug (not a locking type) to comply with Safety Standards.

It is recommended to use commercially available supply voltage surge suppression where there is excessive electrical noise.

Input line fusing: The pump uses a type T1.0AH 250V 20mm time-delayed cartridge fuse, located in the combined mains IEC inlet socket and fuse drawer at the rear of the pump. A spare fuse is provided in the drawer.

Conductor coding:

Before starting the WATSON-MARLOW 323S pump, please complete the following checks:

• Ensure that proper connections are achieved between the pump tube and suction and discharge piping.

• Ensure proper connection has been made to a suitable power supply.

• Ensure that the recommendations for good pump installation practice are followed.

• Check the position of the voltage selector switch.

• Check the mains power switch at the rear of the pump.

• Check the fuse in the mains inlet socket at the rear of the pump.

• Ensure that the mains IEC plug is correctly fitted in the mains IEC inlet socket.

Switch on the power supply at the rear of the pump. The pump will run a power-on test. If a fault is found, an error message is displayed. If the pump starts running, look for the ‘!’ symbol on the display, which indicates that the pump is set for auto-restart. Press the STOP key if you need to stop the pump.

The WATSON-MARLOW 323S is now ready to operate according to the first-time start-up defaults listed below:

All operating parameters can be changed using key-presses as described in the manual operation section.

The auto-restart facility on the WATSON-MARLOW 323S will restart the pump after a mains power interruption, returning it to its previous operating state.

To install auto-restart:

1. Ensure mains power is available to the pump.

2. Stop the pump. Turn off the mains power switch at the rear of the pump.

3. Hold down the START key and turn the mains power switch on. The ‘!’ symbol will appear on the display.

4. Start the pump. If the mains supply is interrupted, the pump will automatically restart when power returns.

Auto-restart is retained even when the pump is switched off.

To remove auto-restart:

1. Switch off the mains power at the rear of the pump.

2. Hold down the STOP key and turn the mains power switch on. The ‘!’ symbol will go out.

Caution: Do not use auto-restart for more than 10 starts per hour. Remote control is recommended where a high number of starts is required.

To operate the WATSON-MARLOW 323S pump in manual mode, follow these instructions:

• Adjust Speed: Use the UP key to increase the set speed and the DOWN key to reduce it. You can adjust the speed while the pump is stopped or running. The 323S increments in steps of 1rpm. It is recommended to reduce the speed to a minimum before starting the pump.

• Change Direction: Press the DIRECTION key to reverse the direction of rotation. The direction is shown by the rotation symbol on the display and can be changed while the pump is stopped or running.

• Start Pump: Press the START key. The rotation symbol will move to confirm the pump is operating.

• Stop Pump: Press the STOP key. The pump will stop immediately. The display will continue to show the previous speed and direction, and the pump will return to this speed when the START key is pressed again.

• Zero Speed Operation: You can reduce the pump speed to 0 rpm with the DOWN key. The pump is still in the running state and the rotation symbol will continue to move. Press the UP key to return the pump to the minimum speed.

The keypad on the WATSON-MARLOW 323S can be locked to prevent changes to pump speed or other settings, making it possible only to start or stop the pump. A padlock symbol will show on the display when locked.

• To lock the keypad while running: Set the pump running. Hold down the START key for more than 2 seconds. The padlock symbol will appear, and only the START and STOP keys will function.

• To lock the keypad while stopped: Hold down the STOP key for more than 2 seconds. The padlock symbol will appear. The pump will start and stop, but the speed and direction will be locked.

• To unlock the keypad while running: Hold down the START key for a further 2 seconds. The padlock symbol will be removed.

• To unlock the keypad while stopped: Hold down the STOP key until the padlock symbol is removed.

The MemoDose facility allows the WATSON-MARLOW 323S pump to dispense a set quantity or dose of fluid each time a key is pressed. Follow these steps:

1. Set Initial Dose: Set the pump speed and direction. Place a suitable measuring container at the outlet and press START.

2. Start MemoDose: When the required volume of fluid has been dispensed, press the STOP key twice within half a second. This starts the MemoDose feature. The display will show “dos” for 3 seconds, then change to show 100%.

3. Repeat or Adjust Dose: Measure the quantity dispensed. If it is correct, press START to repeat the dose. If the dose needs adjustment:

• If the initial dose was too large, use the DOWN key to reduce the volume % shown on the display.

• If the initial dose was too small, use the UP key to increase the volume %.

4. Dispense New Dose: Press START. The pump will dispense the new dose, and the display will count down as it proceeds. The pump will stop when the dose is complete.

5. Fine-Tune: Measure the new dose. Use the UP and DOWN keys to further adjust the dose until the correct quantity is obtained. You can adjust the dose size from 1% to 999%. The keypad lock can be used to prevent further changes.

6. Exit MemoDose: Press the STOP key twice within half a second to exit MemoDose and return to manual operation.

Notes: You must exit MemoDose to change pump speed and direction. To retain the MemoDose value through a power interruption, the pump must be in auto-restart mode.

The WATSON-MARLOW 323S pump is sealed to IP31 and is suitable for wipe-down cleaning. Do not use solvents, mechanical scourers, strong organic acids, or alkali-based cleaning solutions.

• To clean the pumphead, remove any tubing, detach the pumphead, and wash it thoroughly with a mild solution of detergent in water.

• Check moving parts of the rotor from time to time for freedom of movement. Lubricate pivot points and rollers occasionally with Teflon lubricating oil.

• The pump case has good chemical resistance to inorganic acids, saline solutions, alkalis, some hydrocarbons, and many oils and greases. It is suitable for wipe-down but not for long-term contact with alcohols. The case may be damaged by contact with strong acids or strong solvents.

There are no user-serviceable parts inside the pump. The unit should be returned for service.

If the pump display remains blank when the pump is on, make the following checks:

• Check the position of the voltage selector switch at the rear of the pump.

• Check the mains power switch at the rear of the pump.

• Check that mains power is available to the pump.

• Check the fuse in the fuse drawer of the IEC mains power connector at the rear of the pump.

• Check the fuse in the mains power plug if one is present.

If the pump runs but there is little or no flow, make the following checks:

• Check that the tube and rotor are in the pumphead.

• Check that fluid is supplied to the pump.

• Check that the tube is not split or burst.

• Check for any kinks or blockages in the lines.

• Check that any valves in the lines are open.

• Check that the correct wall-thickness tube is being used.

• Check direction of rotation.

• Check that the rotor is not slipping on the drive shaft.

If a fault condition is detected, the WATSON-MARLOW 323S pump will stop, disable all keys, and show an error number. Refer to the table below for suggested actions.

The part number for the replacement fuse for the WATSON-MARLOW 323S is FS0003.

Installation

The 323S 400 rpm drive has an integral mounting plate for a 313 or 314 pumphead.

1. Engage the pumphead drive slot with the end of the pump drive shaft.

2. Align the pumphead until the bayonet engages with the mounting plate.

3. Turn the pumphead clockwise until it locks into an upright position.

Removal

Push the locking lever back and turn the pumphead anti-clockwise until it is free from the mounting plate.

Tube Loading

1. Switch off the pump before loading the tube.

2. Lift the “flip top” track until it is fully open.

3. Set the tube clamps to the correct tube size. Align the scale on both sides of the pumphead. If the tube is dirty or there is a high suction lift, the tube clamps may need a smaller setting.

4. Select enough tube length for the curve of the pump track. Slide the tube into the open pumphead. The tube must not be twisted or stretched against the rollers.

5. Ensure the tubing locates in the centre of the tube clamps. Carefully lower the track, checking that the tube is not crushed in the clamps or overstretched.

When using Marprene tubing: Re-tension new tube after the first 30 minutes of running. Stop the pump, release the flip top, and allow the tube to resettle naturally. Re-clamp the tube and restart the pump. This corrects normal stretching and is essential for good tube life.

Note: 314D pumpheads should run no faster than 300 rpm when in continuous use. Speeds up to 400 rpm are permissible for intermittent use.

Warning: 314MC and 318MC pumpheads must not run at speeds greater than 110 rpm.

Installation

The 323S 400 rpm drive has an integral mounting plate for a 314MC or 318MC pumphead.

1. Engage the pumphead drive slot with the end of the pump drive shaft.

2. Align the pumphead until the bayonet engages with the mounting plate.

3. Turn the pumphead clockwise until it locks into an upright position.

Removal

Push the locking lever back and turn the pumphead anti-clockwise until it is free from the mounting plate.

Tube Loading

1. Move the cam lever over to unlock the cassette. Lift the cassette from the track and remove any old tubing.

2. Slot one end of the new tubing segment into a cassette leg. Slot the other end into the other cassette leg. The three colored collars must be outside the cassette legs.

3. Slide the tubing evenly down into the slots. Do not twist the tube.

4. Slip the collars past the retaining fingers, ensuring the tubing reaches the bottom of the slots. Gently pull the tube in towards the cassette to fix the collars in position.

5. Drop the loaded cassette into the pumphead. Cassettes can fit in either direction.

6. Push the cassette down until the cassette legs hook into the pumphead body. Ensure the tube is settled naturally and not pinched.

7. Flip the cam lever upright to lock the cassette in the pumphead. The cam lever controls occlusion. For higher pressure, the lever can be moved beyond vertical, but this will shorten tube life and increase drive torque.

Installation

1. The 501RL track will fit on the drive in three orientations. Secure the track with the locating screw.

2. The rotor grips the drive shaft via a split collet. Ensure the drive shaft is degreased before fitting the rotor to prevent slipping. Tighten the rotor screw to a torque of 3Nm.

Tube Loading

1. Switch off the mains supply. Unlock and open the pumphead guard.

2. Select a minimum length of 240mm of tubing. Fit one end of the tubing into a clamp.

3. The rotor has tube guide rollers that pull the tube into the pumphead. Turn the rotor carefully until the tube guides pick up the tube. Continue to turn the rotor, feeding the tubing between the guides.

4. When the tube has gone around the pump track, fit the other end into the clamp.

5. Check that the tubing has fitted naturally against the track. Release the clamps and adjust the tubing if it is slack, twisted, or stretched.

6. The tube clamps can accommodate various tube diameters by pushing in or pulling out the grip bars within the clamp. Set the clamps to apply the minimum necessary pressure.

7. Restart the pump. Free the downstream clamp for a short time while the pump is running so the tube can find its natural length. Keep fingers clear of the moving rotor. Shut and lock the guard after adjusting.

When using Marprene tubing: Re-tension new tube after the first 30 minutes of running. Stop the pump, release the outlet clamp, pull any slack tube from the pumphead, and re-clamp. This corrects normal stretching and is essential for good tube life.