English Operating manual Refrigerated and Heating Circulators F38-EH JULABO GmbH 77960 Seelbach / Germany Tel. +49 (0) 7823 / 51-0 Fax +49 (0) 7823 / 24 91 info@julabo.de www.julabo.de 1.951.0254-V2 19510254-V2.doc 06/13 Print date: 11.07.
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 operation and possible applications of our circulators. For optimal utilization of all functions, we recommend that you thoroughly study this manual prior to beginning operation.
EH TABLE OF CONTENTS Operating manual .................................................................................................................... 4 1. Intended use .................................................................................................................... 4 1.1. Description .................................................................................................................. 4 2. Operator responsibility – Safety recommendations ..............................
Operating manual Operating manual 1. Intended use JULABO circulators have been designed to control the temperature of specific fluids in a bath tank. The units feature pump connections for temperature control of external systems (loop circuit). JULABO circulators are not suitable for direct temperature control of foods, semi-luxury foods and tobacco, or pharmaceutical and medical products. Direct temperature control means unprotected contact of the object with the bath medium (bath fluid). 1.1.
EH When using hazardous materials or materials that could become hazardous, the circulator may be operated only by persons who are absolutely familiar with these materials and the circulator. These persons must be fully aware of possible risks. If you have any questions concerning the operation of your unit or the information in this manual, please contact us! Contact: JULABO GmbH Eisenbahnstraße 45 77960 Seelbach / Germany Tel. +49 (0) 7823 / 51-0 info@julabo.de Fax +49 (0) 7823 / 24 91 www.julabo.
Operator responsibility – Safety recommendations well ventilated areas. The unit is not for use in explosive atmosphere. Only use recommended materials (bath fluids). Only use non-acid and non corroding materials. When using hazardous materials or materials that could become hazardous, the operator must affix the enclosed safety labels to the front of the unit so they are highly visible: 1 Warning label W00: Colors: yellow, black Danger area. Attention! Observe instructions.
EH 7
Operator responsibility – Safety recommendations 2.2. EC Conformity The products described in the operating instructions conform to the requirements of the following European guidelines: Directive of the European Parliament and of the Council on the approximation of the laws of the Member States relating to machinery. EMC guideline with respect to legal harmonization of the member countries concerning electromagnetic compatibility. JULABO GmbH Eisenbahnstr. 45 77960 Seelbach / Germany 2.3.
EH 2.4. Technical specifications Working temperature range Temperature stability Temperature selection Temperature indication Resolution ATC - Absolute Temperature Calibration Temperature control °C °C °C F38-EH -35 ... 80 ±0.03 digital LED 0.1 1-point PID1 Heater wattage (at 230 V) kW 2.0 Cooling capacity Medium ethanol Refrigerant °C kW +20 0 -20 0.92 0.66 0.32 R404A Circulating pump: discharge, max.at 0 bar pressure, max.
Operator responsibility – Safety recommendations Safety installations according to IEC 61010-2-010: Excess temperature protection adjustable from 0 °C ... 170 °C Low liquid level protection float switch Classification according to DIN 12876-1 class III Alarm message optical + audible (permanent) Environmental conditions according to IEC 61 010-1: Use only indoor. Altitude up to 2000 m - normal zero. Ambient temperature: +5 ... +40 °C Air humidity: Max. rel.
EH Operating instructions 3. 3.1. Safety notes for the user Explanation of safety notes In addition to the safety warnings listed, warnings are posted throughout the operating manual. These warnings are designated by an exclamation mark inside an equilateral triangle. “Warning of a dangerous situation (Attention! Please follow the documentation).” The danger is classified using a signal word. Read and follow these important instructions for averting dangers.
Safety notes for the user 12 material. Do not stay in the area below the unit. Make sure you read and understand all instructions and safety precautions listed in this manual before installing or operating your unit. Never operate the unit without bath fluid in the bath. Set the excess temperature safety installation at least 25 °C below the fire point of the bath fluid.
EH Notice: Check the safety installations at least twice a year! Excess temperature protection according to IEC 61010-2-010. With a screwdriver turn back the adjustable excess temperature protection until the shut-down point (actual temperature). Low level protection according to IEC 61010-2-010. To check the function of the float, it can be manually lowered with a screwdriver for example. Caution: The temperature controlling i.e. of fluids in a reactor constitutes normal circulator practice.
Operating controls and functional elements 4.
EH 1a 1b Mains power switch, illuminated Mains power switch, illuminated 2 Edit keys Setpoint increase or decrease Press keys shortly for step-by-step changes, Keep the keys pressed for fast change of setpoint 3 OK key (store) 4 LED temperature display, menu indication 5 Control indicator –Heating 6 Control indicator – Cooling 7 Control indicator – Alarm 80 40 0 8 9a for circulator for cooling machine 120 160 °C 15 A M P Adjustable excess temperature protection according to IEC 61010-2-0
Preparations 5. 5.1. Preparations Installation 5.2. Place the unit on an even surface on a pad made of nonflammable material. The circulator fitted with a stainless steel bridge is placed on on the back of the bath tank leaving the bath open on the front side. Using the castors move the unit to the intended location.
EH Recommended bath fluids: Bath fluid soft/decalcified water mixture water/glycol, mixture 1:1 Temperature range 5 °C to 80 °C -20°C to 50°C JULABO bath fluids JULABO Description Order Number Temperature range Flash point Fire point Color JULABO Description Order Number Temperature range Flash point Fire point Color Color 10 liters 5 liters °C °C °C 10 liters 5 liters °C °C °C Thermal G 8 940 124 8 940 125 -30 ... 80 --light yellow Thermal HY 8 940 104 8 940 105 -80 ...
Preparations 5.3. Filling / Draining Notice: Pay attention to the thermal expansion of bath oil during heating to avoid overflowing of the liquid. Do not drain the bath fluid while it is hot! Check the temperature of the bath fluid prior to draining (by switching the unit on for a short moment, for example). Store and dispose the used bath fluid according to the laws for environmental protection. Filling Take care that no liquid enters the interior of the circulator.
EH 5.4. Temperature application to external systems Caution: Securely attach all tubing to prevent slipping. If the circulator is operated without external system, close the pump connector (14a) with the cap nut. The circulator is used for temperature application to external, closed systems (loop circuit). The circulator is used for temperature application to external, closed systems (loop circuit) with simultaneous temperature application in the circulator bath.
Preparations Warning: Tubing: At high working temperatures the tubing used for temperature application and cooling water supply represents a danger source. A damaged tubing line may cause hot bath fluid to be pumped out within a short time. This may result in: Burning of skin Difficulties in breathing due to hot atmosphere Safety recommendations Employ suitable connecting tubing. Make sure that the tubing is securely attached.
EH 6. 6.1. Operating procedures Power connection Caution: Only connect the unit to a power socket with earthing contact (PE – protective earth)! The power supply plug serves as safe disconnecting device from the line and must be always easily accessible. Never operate equipment with damaged mains power cables. Regularly check the mains power cables for material defects (e.g. for cracks).
Operating procedures Note: Shorten heat-up time Whenever cooling is not required because the actual working temperature value is increased by >30 °C for example, turn off the refrigeration unit with the mains switch (1b). In such case, model combinations connected with the control cable (15) intermittently indicate the message E 21. As soon as the desired bath temperature is reached, turn on the refrigeration unit with the mains switch (1b) again and the message E 21 disappears. 6.3.
EH 6.4. Setting the temperatures Factory setting: 25°C Setting can be carried out in the start/stop condition. 1. Press one of the keys for a short moment. The setpoint value instead of the actual value is indicated on the display for about 8 seconds. The value can now be changed. 2. Change value: Press to set a higher value. to set a lower value. Press Keep the keys depressed for the value to change fast. 3. Press the key to store the value.
Operating procedures 6.5. ATC - Absolute Temperature Calibration Working temperature range refer to page 9 1-point calibration: The temperature sensor can be calibrated at any value within the working temperature range. Set the high temperature cut-off / safety temperature to a value above the desired adjustment value (Example: 80 °C). 80 40 120 0 160 Place a calibrated thermometer (resolution: 0.01 °C) in the middle of the bath to measure the actual bath temperature. 1.
EH 6.6. Timer function With the timer function the operating time can be limited to an allowed time. 6.6.1. Setting the time The setting can only be made in the Stop status. 1. Calling the timer function: Factory setting: Hold the key pressed and activate the edit key shortly. The time which was set last, is shown. 2. Setting the time: Activate key Max. time: to set a higher value . to set a lower value .
Operating procedures 6.7. Safety installations according to IEC 61010-2-010 Check the safety installations at least twice a year! See page 13. 6.7.1. Excess temperature protection Warning: The excess temperature protection should be set at least 25 °C below the fire point of the bath fluid used. In the event of wrong setting there is a fire hazard! We disclaim all liability for damage caused by wrong settings! This safety installation is independent of the control circuit.
EH 7. Troubleshooting guide / Error messages + Whenever the microprocessor electronics registers a failure, a complete shutdown of the heater 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. Press the key to quit the audible signal. The circulator is operated without bath fluid, or the liquid level is insufficient. Replenish the bath tank with the bath fluid.
Troubleshooting guide / Error messages Warning without a complete shutdown of the unit: Compressor stage 1 does not work. The motor of the cooling compressor is equipped with an overload protector, which will be activated by excessive temperature in the capsule or by excessive current consumption. Poor air circulation (distance to walls, dirt accumulated on condenser) may cause the motor to be disconnected.
EH 8. Electrical connections Notice: Use shielded cables only. The shield of the connecting cable is electrically connected to the plug housing. / Control output The connector may be used for control of JULABO refrigerated circulators or as output for alarm messages. 4 1 2 Circuit: 5 Operation Alarm = relay powered = relay not powered 3 Pin assignment: Pin Signal 1 +24 V (I max. current 25 mA) 2 0V 3 Alarm relay 4 Reserved - do not use! 5 Reserved - do not use! 9.
Cleaning / repairing the unit Cleaning For cleaning the bath tank and the immersed parts of the circulator, use low surface tension water (e.g., soap suds). Clean the outside of the unit using a wet cloth and low surface tension water. The circulator is designed for continuous operation under normal conditions. Periodic maintenance is not required. The tank should be filled only with a bath fluid recommended by JULABO. To avoid contamination, it is essential to change the bath fluid from time to time.
