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Congratulations! You have made an excellent choice. JULABO thanks you for the trust you have placed in us. This operating manual has been designed to help you gain an understanding of the principles of operating and possibilities of our circulators. For optimum utilization of all functions, we recommend that you thoroughly study this manual prior to beginning operation.
(e. g. for glass equipment). Operator responsibility – Safety recommendations The products of JULABO Labortechnik GmbH warrant a safe operation if installation, operation and maintenance is carried out according to common safety regulations. This section informs you about potential dangers that may arise from operating the recirculating cooler and also mentions the most important safety precautions.
instrument being operated in the same mains. This unit is designed for operation in a controlled electromagnetic environment. This means that transmitting devices (e.g. cellular phones) should not be used in the immediate vicinity. Magnetic radiation may influence other units with components susceptible to magnetic fields (e.g.
Technical specifications Recirculating Cooler FL2503 FLW2503 Cooling air cooled water cooled Working temperature range °C -20 ... +40 -20 ... +40 Temperature stability °C ±0.5 Temperature selection: digital via key pad indication on LED-DISPLAY remote control via personal computer indication on monitor...
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Recirculating Cooler FL2506 FLW2506 Cooling air cooled water cooled Working temperature range °C -20 ... +40 -20 ... +40 Temperature stability °C ±0.5 Temperature selection: digital via key pad indication on LED-DISPLAY remote control via personal computer indication on monitor Temperature indication: LED-DISPLAY Resolution...
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Recirculating Cooler FL4003 FLW4003 Cooling air cooled water cooled Working temperature range °C -20 ... +40 -20 ... +40 Temperature stability °C ±0.5 Temperature selection: digital via key pad indication on LED-DISPLAY remote control via personal computer indication on monitor Temperature indication: LED-DISPLAY Resolution...
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Recirculating Cooler FL4006 FLW4006 Cooling air cooled water cooled Working temperature range °C -20 ... +40 -20 ... +40 Temperature stability °C ±0.5 Temperature selection: digital via key pad indication on LED-DISPLAY remote control via personal computer indication on monitor Temperature indication: LED-DISPLAY Resolution...
3.1. Warning functions and safety installations Excess temperature protection 85 °C - fixed value Low liquid level protection float switch Alarm message optical + audible (permanent) Excess temperature - Warning function 75 °C Overload protection for compressor and pump motor Classification according to DIN 12876-1 class I Environmental conditions according to IEC 61 010-1:...
3.2. Cooling water connection Only for water cooled models - FLW: Cooling water pressure (IN / OUT ) max. 4,5 bar Difference pressure (IN - OUT ) 2 bar to 4,5 bar Flow rate on FLW250x typical 4,1 l/min Flow rate on FLW400x typical 6,6 l/min Cooling water temperature...
Safety notes for the user In addition to the safety warnings listed above, warnings are posted throughout the manual. These warnings are designated by an exclamation mark inside an equilateral triangle. „Warning of a dangerous situation (Attention ! Please follow the documentation).“...
Example: model FL2506 with 1.5 kg filling quantity of refrigerant R404A = 3,13 m volume Rear view Example: FL2503 • Connect the tubings for cooling the external system to the pump connectors M16x1 for feed and return (14) on the rear of the recirculating cooler.
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• Only water cooled models - FLW: Example: Ensure circulation of cooling water by connecting the PVC-tubing tubing to cooling water inlet (IN)and outlet (OUT) on the rear (18) of the recirculating cooler. Cooling water see page 11. 12 mm inner dia. Cooling water connectors G3/4"...
6.1. Tubing Caution: • Employ suitable connecting tubing. • Make sure that the tubing is securely attached. • Avoid sharp bends in the tubing, and maintain a sufficient distance from surrounding walls. • Regularly check the tubing for material defects (e.g. for cracks). •...
Operating controls and functional elements Example: FL25xx Front view Rear view °C RS232 ALARM FL2506 O U T O U T Draufsicht Push Protection lid for fill in opening Protection lid for storing place of operating manual Push °C Lifting device for transportation by crane Mains power switch...
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Keypad, spash-water protected Edit keys (set point increase or decrease) Enter key Store set point value / parameter Indication LED temperature display °C Control indicator – Cooling Control indicator – Alarm Protection lid for fill in opening Feed pressure indication: Manometer Interface RS232: remote control via personal computer RS232 Alarm output (for external alarm signal)
Bath fluids Caution: No liability for use of other bath liquids! Please contact JULABO before using other than recommended bath fluids. JULABO takes no responsibility for damages caused by the selection of an unsuitable bath fluid Do not use alcohols.
8.3. Filling Notice: Risk of injury for hands. Close cover carefully. Take care that no liquid enters the interior of the circulating cooler. Top view Connect the tubing from the external system to the pump connectors and check for leaks Respect instructions from page 13 to page 15! Push Check to make sure that the drain tap (9) is closed.
8.7. AUTOSTART ON / OFF The recirculating cooler has been configured and supplied by JULABO according to N.A.M.U.R. recommendations. This means for the start mode, that the unit must enter a safe operating state after a power failure (non-automatic start mode).
8.8. Remote control: activate – deactivate The recirculating cooler is to be prepared for remote control by a personal computer via the serial interface RS232. Set the interface item from >IOFF< to >ION<. Remote control: activate – deactivate: • Switch off recirculating cooler by pressing the mains switch and wait approx.
10. Troubleshooting guide / Error messages Whenever the microprocessor electronics registers a failure, a complete shutdown of the compressor and circulating pump is performed. The alarm light " " illuminates and a continuous signal tone sounds. The LED temperature display indicates the cause for the alarm in form of a code.
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Clean air-cooled condenser. Check the flow rate and cooling water temperature on water-cooled condenser. If the unit cannot be returned to operation, contact an authorized JULABO service station. Disturbances that are not indicated. Overload protection:: a) for cooling machine b) for pump motor After a short cooling interval, the unit will automatically start running.
11. Electrical connections Use shielded cables only. Notice: The shield of the connecting cable is electrically connected to the plug housing. The unit ensures safe operation if connecting cables with a maximum length of 3 m are used. The use of longer cables does not affect proper performance of the unit, however external interferences may have a negative impact on safe operation.
12. Remote control 12.1. Setup for remote control Check the interface parameters for both interfaces (on recirculating cooler and PC) and make sure they match. Interface parameters are pre-determined. RS232 RS232 Type 4800 bauds Baudrate even Parity hardware handshake Handshake 12.2.
The out commands are valid only in remote control mode. Examples: Command to set the working temperature to15,5 °C: out_sp_00 ⇔ 15.5↵ Command to ask for the working temperature in_sp_00↵ Response from the recirculating cooler: 15.5↵ LF 12.3. List of commands out commands: Setting parameters or temperature values.
12.5. Error messages Description Error messages Low liquid level alarm. -01 LOW LEVEL ALARM Working temperature sensor short-circuited or -05 WORKING SENSOR ALARM interrupted. High temperature warning. Starting at 75 °C -03 EXCESS TEMPERATURE WARNING (no deactivation) The return temperature soon reaches the switch-off value of the high temperature warning function (85 °C) Internal error when reading or writing the I C bus.
13. Cleaning / repairing the unit Caution: Always turn off the unit and disconnect the mains cable from the power source before cleaning the unit. Prevent humidity from entering into the circulator. Electrical connections and any other work must be performed by qualified personnel only.
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• Attach a short fault description. If you intend to return your JULABO unit to us, you will find a Service Return Form on our website www.julabo.de . Please use this as a delivery note and include it to the unit or send it in advance either by Fax or E-Mail.
13.1. JULABO Service – Online remote diagnosis JULABO circulators of the HighTech series are equipped with a so-called black box. This box is implemented in the controller and records all significant data for the last 30 minutes. In case of a failure, this data can be read out from the unit by using special software.
13.2. Draining Notice: Store and dispose the used bath fluid according to the laws for environmental protection. Risk of injury for hands when mounting the venting grid. ° C ° C • Turn off the unit and disconnect the RS232 ALARM RS232 ALARM...
10 000 working hours. To apply for this extended warranty the user must register the unit on the JULABO web site www.julabo.de, indicating the serial no. The extended warranty will apply from the date of JULABO Labortechnik GmbH’s original invoice.
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