1. Introduction
This manual provides essential information for the safe and efficient operation, setup, and maintenance of your LAUDA LCK 2907 Alpha RA 8 Cooling Circulator. Please read this manual thoroughly before operating the device to ensure proper function and to prevent damage or injury.
The LAUDA LCK 2907 Alpha RA 8 is designed for precise temperature control in various laboratory and industrial applications, offering cooling performance across a wide temperature range.
2. Safety Instructions
Adherence to these safety instructions is crucial for safe operation and to prevent personal injury or damage to the equipment.
- Electrical Safety: Ensure the device is connected to a properly grounded power outlet with the specified voltage (220V, 60 Hz). Do not operate with damaged power cords.
- Fluid Handling: Use only recommended heat transfer liquids. Avoid contact with skin and eyes. Refer to the safety data sheet (SDS) for the specific fluid used.
- Ventilation: Ensure adequate ventilation around the circulator to prevent overheating. Do not block air inlets or outlets.
- Placement: Place the unit on a stable, level surface. Maintain sufficient clearance from walls and other equipment.
- Temperature Extremes: Be aware of extreme temperatures of the bath fluid and external connections. Use appropriate personal protective equipment (PPE).
- Emergency Shutdown: Familiarize yourself with the emergency stop procedure and the location of the main power switch.
3. Setup
- Unpacking: Carefully remove the circulator from its packaging. Inspect for any shipping damage.
- Placement: Position the unit on a stable, level surface, ensuring at least 10 cm (4 inches) of clearance on all sides for proper ventilation.
- Fluid Filling:
- Open the bath cover.
- Fill the bath with the appropriate heat transfer liquid up to the marked fill line. Refer to the fluid manufacturer's guidelines for compatibility and temperature range.
- Ensure the pump is fully submerged.
- External Connections (if applicable): Connect external applications using appropriate tubing and fittings. Ensure all connections are secure to prevent leaks.
- Power Connection: Connect the power cord to the circulator and then to a grounded 220V, 60 Hz power outlet.
Figure 1: LAUDA Alpha Cooling Circulators. This image displays three units, highlighting their compact design and front control panels.
4. Operating Instructions
- Power On: Press the main power switch, usually located on the rear or side of the unit. The LED display will illuminate.
- Setting Temperature:
- Use the 3-button operation panel to navigate the menu.
- Press the 'Set' button (or equivalent) to enter temperature setting mode.
- Use the up/down arrow buttons to adjust the desired temperature.
- Confirm the setting by pressing 'Set' again or waiting for the display to revert.
- Starting Circulation/Cooling: Once the temperature is set, the unit will automatically begin to circulate and cool the bath fluid to the setpoint. The compressor will activate as needed.
- Adjusting Flow Rate: The flow rate can be adjusted using inserts and fittings to match the size of the bath or external application. Refer to the specific accessories for detailed instructions.
- Monitoring: The large LED display provides clear readings of the current bath temperature and setpoint.
- Power Off: To turn off the unit, press the main power switch. For extended periods of non-use, disconnect the power cord from the outlet.
Figure 2: LAUDA Cooling Circulator with Digital Display. This image shows a single unit from an angle, highlighting the digital control panel and the bath opening.
5. Maintenance
Regular maintenance ensures optimal performance and extends the lifespan of your circulator.
- Cleaning the Bath:
- Periodically drain the bath fluid using the drain connection on the rear.
- Clean the bath interior with a mild detergent and soft cloth. Rinse thoroughly with distilled water.
- Refill with fresh heat transfer liquid.
- Cleaning Air Inlet: The front cover can be easily removed for cleaning the cool air inlet. Use a soft brush or vacuum cleaner to remove dust and debris from the condenser fins. Ensure the unit is powered off and unplugged before cleaning.
- Fluid Replacement: Replace the heat transfer fluid according to the fluid manufacturer's recommendations or if it appears discolored or contaminated.
- External Connections: Regularly check all tubing and connections for wear, cracks, or leaks. Replace as necessary.
6. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Unit does not power on | No power supply; Power cord disconnected; Main switch off | Check power outlet; Ensure power cord is securely connected; Turn on main switch |
| Temperature not reaching setpoint | Insufficient fluid level; Blocked air inlet; Incorrect setpoint; Overload on cooling capacity | Check and refill fluid; Clean air inlet/condenser; Verify setpoint; Reduce external load or check for proper sizing |
| Error message on display | Sensor fault; Over-temperature; Low fluid level | Refer to specific error codes in the full technical manual (if available); Check fluid level; Allow unit to cool down |
| Unusual noise or vibration | Unit not level; Loose components; Pump issue | Ensure unit is on a stable, level surface; Inspect for loose parts; Contact service if pump noise persists |
If troubleshooting steps do not resolve the issue, please contact LAUDA customer support.
7. Specifications
- Model: LCK 2907 Alpha RA 8
- Operating Voltage: 220V, 60 Hz
- Temperature Range: -25 °C to 85 °C
- Cooling Capacity: Up to 425 W (at specific temperatures, refer to full technical data sheet)
- Control: 3-button operation with large LED display
- Drain Connection: Rear side for easy emptying
- Included: Bath covers and pump kits
- Manufacturer: LAUDA DR. R. WOBSER GMBH & CO. KG
- Item Model Number (Internal): 1180A88EA
8. Warranty and Support
For warranty information, technical support, or service requests, please contact LAUDA customer service or your authorized distributor. Keep your purchase receipt and product serial number handy when contacting support.
Further documentation, including detailed technical specifications and safety data sheets for specific heat transfer fluids, may be available on the official LAUDA website or upon request.
