Julabo F250 User manual

19514803.doc 01.02.2011
English
Operating manual
Recirculating Cooler
F250
JULABO Labortechnik GmbH
77960 Seelbach / Germany
+49 (0) 7823 / 51-0
+49 (0) 7823 / 24 91
|[email protected]
Þwww.julabo.de

2
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.
The JULABO Quality Management System
Temperature control devices for research and industry are developed,
produced, and distributed according to the requirements of
ISO 9001:2008. Certificate Registration No. 01 100044846
This product has been tested to the requirements of CAN/CSA-C22.2
No. 61010-1, second edition, including Amendment 1, or a later
version of the same standard incorporating the same level of testing
requirements.
Unpacking and inspecting
Unpack the circulator and accessories and inspect them for possible transport damage.
Damage should be reported to the responsible carrier, railway, or postal authority, and a
damage report should be requested. These instructions must be followed fully for us to
guarantee our full support of your claim for protecting against loss from concealed damage.
The form required for filing such a claim will be provided by the carrier.
Printed in Germany Changes without prior notification reserved
1 951.4803 01/11

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TABLE OF CONTENTS
1. Intended use..................................................................................................................4
2. Operator responsibility – Safety recommendations .......................................................4
2.1. Disposal ................................................................................................................6
2.2. EC Conformity.......................................................................................................7
3. Technical specifications.................................................................................................8
3.1. Warning functions and safety installations ............................................................9
4. Safety notes for the user..............................................................................................10
4.1. Explanation of safety notes .................................................................................10
4.2. Explanation of other notes...................................................................................10
4.3. Safety recommendations.....................................................................................10
5. Installation....................................................................................................................12
5.1. Tubing .................................................................................................................14
6. Operating controls and functional elements.................................................................15
7. Operating procedures..................................................................................................16
7.1. Bath fluids............................................................................................................16
7.2. Power connection................................................................................................17
7.3. Filling...................................................................................................................17
7.4. Switching on / Start - Stop...................................................................................17
7.5. Setting the temperatures.....................................................................................18
7.6. AUTOSTART ON / OFF......................................................................................18
8. Safety installations.......................................................................................................19
8.1. Excess temperature protection............................................................................19
8.2. Low level protection.............................................................................................19
9. Troubleshooting guide / Error messages.....................................................................20
10. Cleaning / repairing the unit.........................................................................................21
10.1. Draining...............................................................................................................22
11. Warranty conditions.....................................................................................................23

Intended use
4
1. Intended use
JULABO recirculating coolers have been designed for temperature application to specific
fluids. The pump connections can be used for cooling applications in an external circuit at a
constant temperature.
PID1
The recirculating coolers are operated via the splash-proof keypad. The
implemented microprocessor technology allows to set and to store the
setpoint that can be indicated on the LED temperature display.
The PID temperature regulation is used to withdraw heat from the bath fluid
by means of the cooling machine and to automatically regulate the required
need.
JULABO recirculating coolers are not conceived for direct temperature application
to food and luxury articles or pharmaceutical and medico-technical products.
Direct temperature application means: Unprotected contact of the object with the
bath medium (bath fluid).
2. Operator responsibility – Safety recommendations
The products of JULABO ensure safe operation when installed, operated, and maintained
according to common safety regulations. This section explains the potential dangers that may
arise when operating the circulator and also specifies the most important safety precautions to
preclude these dangers as far as possible.
The operator is responsible for the qualification of the personnel operating the units.
The personnel operating the units should be regularly instructed about the dangers
involved with their job activities as well as measures to avert these dangers.
Make sure all persons tasked with operating, installing, and maintaining the unit have read
and understand the safety information and operating instructions.
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.

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If you have any questions concerning the operation of your unit or the information in this
manual, please contact us!
Contact: JULABO Labortechnik GmbH
Eisenbahnstraße 45
77960 Seelbach / Germany
Tel. [phone] / 51-0 [email protected]
Fax [phone] / 24 91 www.julabo.de
Safety instructions for the operator:
You have received a product designed for industrial use. Nevertheless, avoid strikes to the
housing, vibrations, damage to the operating-element panel (keypad, display), and
contamination.
Make sure the product is checked for proper condition regularly (depending on the
conditions of use). Regularly check (at least every 2 years) the proper condition of the
mandatory, warning, prohibition and safety labels.
Make sure that the mains power supply has low impedance to avoid any negative effects
on instruments being operated on 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 affect other devices with components sensitive to magnetic fields
(e.g., monitors). We recommend maintaining a minimum distance of 1 m.
Permissible ambient temperature: max. 40 °C, min. 5 °C.
Permissible relative humidity: 50% (40 °C).
Do not store the unit in an aggressive atmosphere.
Protect the unit from contamination.
Do not expose the unit to sunlight.
Appropriate operation
Only qualified personnel is authorized to perform configuration, installation, maintenance and
repairs of the circulator.
Routine operation can also be carried out by untrained personnel who should however be
instructed by trained personnel.
Use:
The bath can be filled with flammable materials. Fire hazard!
There might be chemical dangers depending on the bath medium used.
Observe all warnings for the used materials (bath fluids) and the respective instructions
(safety data sheets).
Insufficient ventilation may result in the formation of explosive mixtures. Only use the unit in
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.

Operator responsibility – Safety recommendations
6
When using hazardous materials or materials that could become hazardous, the operator
must affix the enclosed safety labels (1 + 2) to the front of the unit so they are highly visible:
1
Warning label W00: Colors: yellow, black
Danger area. Attention! Observe instructions.
(operating manual, safety data sheet)
2
or
Mandatory label M018: Colors: blue, white
Carefully read the user information prior to beginning operation.
Scope: EU
2
Semi S1-0701 Table A1-2 #9
Carefully read the user information prior to beginning operation.
Scope: USA, NAFTA
2.1. Disposal
This unit contains the refrigerants R134a – at this time considered not to have any negative
effects on the ozone layer. However, during the long operating period of the unit, disposal
prescriptions may change. So only qualified personnel should take care of disposal.
Valid in EU countries
Directive 2002/96/EC of the European Parliament and of the Council of 27
January 2003 on waste electrical and electronic equipment (WEEE).
This directive requires electrical and electronic equipment marked with a
crossed-out trash can to be disposed of separately in an environmentally
friendly manner.
Contact an authorized waste management company in your country.
Disposal with household waste (unsorted waste) or similar collections of
municipal waste is not permitted!

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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 Labortechnik GmbH
Eisenbahnstr. 45
77960 Seelbach / Germany

Technical specifications
8
3. Technical specifications
Recirculating Cooler F250
Working temperature range °C +5 ... +40
Temperature stability °C ±0.5
Temperature selection: digital
via key pad indication on LED-DISPLAY
Temperature indication: LED-DISPLAY
Resolution °C 0.1
Temperature control PID 1
Temperature sensor Pt 100
Excess temperature protection 85 °C - fixed value
Low liquid level protection float switch
Circulating pump:
discharge, max.at 0 bar l/min 15
pressure, max. at 0 Liters bar 0.35
Filling level indicator sight glass
Filling volume from ... to Liters 1.7 ... 2.6
Dimensions (WxLxH) cm 24x40x52
Weight kg 27.0
Ambient temperature range °C 5 ... 40
Return flow temperature max. °C 80
Cooling compressor 1- stage / air cooled
Refrigerant R134a
Cooling capacity
at 115 V / 60 Hz
at 200 V / 60 Hz
at 230 V / 60 Hz
at 230 V / 50 Hz
at 200 V / 50 Hz
Medium: Mixture water-glycol
°C
W
W
W
W
W
+20 +15 + 10 +5
250 240 220 210
250 240 220 210
250 240 220 210
250 240 220 210
220 210 195 185
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50
Current draw (at 230 V) A 3.0
Mains power connection208 - 220 V/60 Hz V/ Hz 207-253 / 60
Current draw at 208V / 220 V A 2.0
Mains power connection 200 V/50-60 Hz V/ Hz 190-210 / 50-60
Current draw (at 200 V) A 2.0
Mains power connection 115 V/60 Hz V/ Hz 103 -127 / 60
Current draw (at 115 V) A 4.0
All measurements have been carried out at: rated voltage and frequency
ambient temperature: 20 °C Technical changes without prior notification reserved.

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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)
Overload protection for compressor and pump motor
Classification according to DIN 12876-1 class I
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. humidity 80 % for temperatures up to +31 °C,
linear decrease down to 50 % relative humidity at a temperature of +40 °C
Max. mains fluctuations of ±10 % are permissible.
The unit corresponds to Class I
Overvoltage category II
Pollution degree 2
Caution:
The unit is not for use in explosive environment
Standards for interference resistance according to EN 61326-1
This unit is an ISM device classified in Group 1 (using high frequency for internal purposes)
Class A (industrial and commercial range).

Safety notes for the user
10
4. Safety notes for the user
4.1. 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.
Warning:
Describes a possibly highly dangerous situation. If these instructions are not
followed, serious injury and danger to life could result.
Caution:
Describes a possibly dangerous situation. If this is not avoided, slight or minor
injuries could result. A warning of possible property damage may also be
contained in the text.
Notice:
Describes a possibly harmful situation. If this is not avoided, the product or
anything in its surroundings can be damaged.
4.2. Explanation of other notes
Note!
Draws attention to something special.
Important!
Indicates usage tips and other useful information.
4.3. Safety recommendations
Follow the safety recommendations to prevent damage to persons or property. Further, the
valid safety instructions for working places must be followed.
•Only connect the unit to a power socket with an earthing contact (PE –
protective earth)!
•The power supply plug serves as a safe disconnecting device from the line
and must always be easily accessible.
•Place the unit on an even surface on a base made of nonflammable
material.
•Make sure you read and understand all instructions and safety precautions
listed in this manual before installing or operating your unit.

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•Never operate the unit without bath fluid in the bath.
•Do not drain the bath fluid while it is hot!
Check the temperature of the bath fluid prior to draining (e.g., by switching
the unit on for a short moment).
•Use 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).
•Never operate damaged or leaking units.
•Always turn off the unit and disconnect the mains cable from the power
source before performing any service or maintenance procedures, or
before moving the unit.
•Always turn off the unit and disconnect the mains cable from the power
source before cleaning the unit.
•Always empty the bath before moving the unit.
•Transport the unit with care.
•Sudden jolts or drops may cause damage in the interior of the unit.
•Observe all warning labels.
•Never remove warning labels.
•Never operate units with damaged mains power cables.
•Repairs are to be carried out only by qualified service personnel.
Warning:
Danger of electric shock! Short Circuit with fire hazard!
The overflow (8) at the rear of the unit is not to be sealed!
If the overflow is sealed, the unit may be damaged by due to overfilling as the
liquid will run into the inside of the unit.
Fire hazard when using water/glycol mixture.

Installation
12
5. Installation
•Lifting and transport:
Lift the unit with two persons taking hold of its bottom plate.
For transport set the unit on a suitable trolley
•Place the unit on an even surface on a pad made of non-
flammable material.
•Cooling machine, pump motor and electronics produce
intrinsic heat that is dissipated via the venting openings.!
Never cover these openings!
•Do not set up the unit in the immediate vicinity of heat sources
and do not expose to sun light.
•Keep at least 20 cm of open space on the front and rear
venting grids.
•The place of installation should be large enough and provide
sufficient air ventilation to ensure the room does not warm up
excessively because of the heat the instrument radiates to the
environment. (Max. permissible ambient temperature: 40 °C).
With regard to a disturbance in the cooling loop (leakage), the
guideline EN 378 prescribes a certain room space to be
available for each kg of refrigerant.
The necessary amount of refrigerant is specified on the type
plate.
> For 0.25 kg of refrigerant R134a, a room space of 1 m3is
required.
Caution:
Securely attach all tubing to prevent slipping.
Do not seal the overflow connector!
•Before operating the unit after transport, wait about one
hour after setting it up. This will allow any oil that has
accumulated laterally during transport to flow back
down thus ensuring maximum cooling performance of
the compressor.
•Unscrew the collar nuts from the pump connector (7a).
•Connect the tubings for cooling the external system to
the pump connectors for feed and return on the rear of
the recirculating cooler.
- Feed – Return
Overflow

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•Connect a piece of tubing to the overflow connector (8) and
drain into a suitable vessel, which always has to be placed
lower than the exit „Overflow“.
Do not seal the overflow connector!
Notice: Flood hazard!.
In case the system to be cooled is located at a higher level than the recirculating
cooler, take note of bath liquid flowing back when the unit is switched off.
Return flow safety device
•Should the filling volume of the bath tank not be sufficient,
prevent the liquid from flowing back by using shut-off valves..
Order No. Description
8 970 456 Shut-off valve (suitable up to +90 °C) M16x1
8 970 444 Adapter M10x1 on M16x1
The following questions shall help to recognize possible dangers
and to reduce the risks to a minimum.
•Are all tubes and electrical cables connected and installed?
Note:
sharp edges, hot surfaces in operation, moving machine parts,
etc.
•What to do when a dangerous substance was spilled on or in
the unit?
Before starting to work, obtain information concerning the
substance and determine the method of decontamination.

Installation
14
5.1. 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).
•Preventive maintenance: Replace the tubing from time to time.
Recommended tubing:
Order No. Suitable for
8930008 1 m CR®-tubing 8 mm inner dia. -20 °C … 120°C F250
8930010 1 m CR®-tubing 10 mm inner dia. -20 °C … 120°C F250
Insulation for tubing
8930410 1 m Insulation tubing 8/10 inner dia.
Tube clamps
8970480 2 Tubing clamps, size 1 tubing 8 inner dia..
8970481 2 Tubing clamps, size 2 tubing 10/12 inner dia.

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6. Operating controls and functional elements
Front view Rear view
15AM
P
15AM
P
15AM
P
15AM
P
15AM
P
15AM
P
15AM
P
15AM
P
15AM
P
15AM
P
1
Mains power switch, splash-water protected
Ion Ooff
Integrated mains circuit breaker (resettable)
2.0 Indication
2.1 LED temperature display
2.2 Control indicator – Cooling
2.3 Control indicator – Alarm
3.0 Keypad, splash-water protected
3.1 Edit keys (set point increase or decrease)
3.2 Enter key Store set point value / parameter
4 Filling level indication
5 Filling opening, at the top
6 Mains power cable with plug
7a
7b Pump connectors - Feed - Return
8 Overflow connector
9 Drain port
10
Handle:
Lift the unit with two persons taking hold of the bottom plate at the
front and rear.

Operating procedures
16
7. Operating procedures
7.1. Bath fluids
Caution:
No liability for use of other bath liquids!
Do not use alcohols.
Water:
•The quality of water depends on local conditions.
•Due to the high concentration of lime, hard water is not suitable for
temperature control because it leads to calcification in the bath.
•Ferrous water can cause corrosion - even on stainless steel.
•Chloric water can cause pitting corrosion.
•Distilled and deionized water is unsuitable. Their special properties cause
corrosion in the bath, even in stainless steel.
•Danger of freezing at working temperatures <5 °C.
Mixture water -glycol:
Strictly observe the safety data and handling instructions from the manufacturer.
The proportion of water might evaporate by and by. Check the mixing ratio
regularly and refill water if necessary.
Recommended bath fluids:
Bath fluids Temperature range
JULABO Thermal G -30 °C ... 80 °C
mixture water/glycol (50:50) -30 °C ... 50 °C
water +5 °C ... 80 °C
Order No. Desription Quantity
8 940 124
8 940 125 JULABO Thermal G JULABO Thermal G 10 liters 5 liters
See website for list of recommended bath fluids.
Contact: www.julabo.de
Notice:
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

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7.2. 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).
•We disclaim all liability for damage caused by incorrect line voltages!
Check to make sure that the line voltage matches the supply voltage specified on the identification plate.
7.3. Filling
Take care that no liquid enters the interior of the circulating cooler.
LConnect the tubing from the external system to the pump
connectors and check for leaks
LCheck to make sure that the drain tap (9) is closed.
•Remove the cap from the filling opening (5).
•Fill in tempering fluid up to marking „H“ of the filling level
indicator.
•Turn the mains switch (1) on
•Switch on unit. To do so press button for approx. 4
seconds.
•Tempering fluid is pumped into the externally connected
system.
Refill fluid up to marking „H“.
•The recirculating cooler is ready for operation.
7.4. Switching on / Start - Stop
Switching on:
•The recirculating cooler is turned on and off with the mains
switch.
The unit performs a self-test. All segments of the 4-digit LED
temperature DISPLAY and all indicator lights will illuminate
Then the software version and the type of unit is indicated.
The display "OFF" indicates the unit is ready to operate (standby
mode).

Operating procedures
18
Start: Press enter for about 4 seconds.
The LED temperature DISPLAY indicates the actual
bath temperature.
Stop: Press enter for about 4 seconds.
Turn the unit off with the mains power switch.
7.5. Setting the temperatures
Factory setting: 25 °C
LSetting 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.
Press to set a lower value.
Keep the keys depressed for the value to change fast.
3. Press enter to store the value.
7.6. 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). This safe
operating state is indicated by „OFF“ on the LED temperature
display. A complete shutdown of the main functional elements
such as compressor and circulating pump is effected
simultaneously.
Should such a safety standard not be required, the AUTOSTART
function (automatic start mode) may be activated, thus allowing the
start of the circulator directly by pressing the mains power switch
or using a timer.
Keep depressed enter and
turn on the unit with the mains power switch.
For a short while the LED DISPLAY indicates the effective start
mode:
AUTOSTART on. 
AUTOSTART off.
Warning:
For supervised or unsupervised operation with the AUTOSTART function, avoid
any hazardous situation to persons or property.
The circulator does no longer conform to N.A.M.U.R. recommendations.

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8. Safety installations
8.1. Excess temperature protection
+8
This safety installation is independent of the control circuit.
When the temperature of the bath fluid has reached the safety
temperature (85 °C), a complete shutdown of the compressor and pump
is effected.
The alarm is indicated by optical and audible signals (continuous tone)
and on the LED-DISPLAY appears the error message
"Error 14".
LCheck dimensioning of application.
Use a stronger recirculating cooler if necessary.
8.2. Low level protection
+8
This safety installation is independent of the control circuit.
If the low liquid level protection device is triggered, a complete shutdown
of the compressor and circulating pump is effected.
The alarm is indicated by optical and audible signals (continuous tone)
and on the LED-DISPLAY appears the error message
"Error 01".
LTurn off the unit with the mains switch, refill bath fluid and turn the unit
on again!
Caution:
For refill always use the same bath fluid type that is already in the bath.
Notice:
Check the low liquid level protection device at least twice a year!
•To execute a functional test, drain the liquid until the alarm for low liquid level
is triggered. Refill liquid afterwards.

Troubleshooting guide / Error messages
20
9. Troubleshooting guide / Error messages
+8Whenever 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.
Press enter to quit the audible signal.
•The recirculating cooler is operated without bath fluid, or the liquid level is
insufficient.
Replenish the bath tank with the bath fluid.
•Tube breakage has occurred (insufficient filling level due to excessive bath
fluid pumped out). Replace the tubing and replenish the bath tank with the
bath fluid.
Cable of the working temperature sensor interrupted or short-circuited.
Error in A/D converter
The return temperature is above the switch-off value of the high temperature
protection (85°C).
Check dimensioning of application.
Use a stronger recirculating cooler if necessary.
After eliminating the malfunction, press the mains power switch off and on
again to cancel the alarm state.
If the unit cannot be returned to operation, contact an authorized service
station.
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.
Mains circuit breaker (resettable)
The mains switch is also the circuit breaker of the unit.
After a cooling interval the unit can be switched on again.