Julabo F25-MC User manual

19510351_a.doc Druck: 17.03.09
English
Operating
manual
Refrigerated and Heating Circulators
F12-MC F25-MC F26-MC
F32-MC F33-MC F34-MC
FP35-MC FP40-MC FP50-MC
FPW50-MC
Innovative Temperature Technology
JULABO Labortechnik GmbH
77960 Seelbach / Germany
+49 (0) 7823 / 51-0
+49 (0) 7823 / 24 91
|[email protected]
Þwww.julabo.de
1.951.0351BE4 02/09

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.
Quality Management System
ISO 9001
2000
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The JULABO Quality Management System:
Temperature control devices for research and industry are developed,
produced, and distributed according to the requirements of
DIN EN ISO 9001:2000.
Certificate Registration No. 01 100044846
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

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TABLE OF CONTENTS
Operating manual ..........................................................................................................5
1. Intended use ..........................................................................................................5
1.1. Description .........................................................................................................5
2. Operator responsibility – Safety recommendations ...............................................6
2.1. Disposal..............................................................................................................8
2.2. EC Conformity ....................................................................................................9
2.3. Warranty conditions............................................................................................9
2.4. Technical specifications ...................................................................................10
2.5. Cooling water connection .................................................................................16
Operating instructions ..................................................................................................18
3. Operating controls and functional elements.........................................................18
4. Safety notes for the user ......................................................................................20
4.1. Explanation of safety notes ..............................................................................20
4.2. Explanation of other notes ...............................................................................20
4.3. Safety recommendations..................................................................................20
5. Preparations.........................................................................................................23
5.1. Installation ........................................................................................................23
5.2. Bath fluids.........................................................................................................24
5.3. Filling / draining ................................................................................................25
5.4. Temperature application to external systems ..................................................26
5.4.1. Tubing ......................................................................................................26
6. Operating procedures ..........................................................................................28
6.1. Power connection.............................................................................................28
6.2. Switching on / Start - Stop................................................................................28
6.3. Automatic / non-automatic start mode .............................................................30
7. Setting the temperatures .............................................................................31
7.1. 1-setpoint mode................................................................................................31
7.2. 3-setpoint mode................................................................................................31
8. Safety installations, warning functions.........................................................33
8.1. Excess temperature protection ........................................................................33
8.1.1. Early warning system, low level protection ..............................................34
8.2. High and low temperature warning functions ...................................................35
8.3. Limitation of the operating temperature range .................................................36

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8.4. Change-over of the warning function to shutdown function.............................37
9. Menu functions............................................................................................38
9.1. Setting the pump pressure...............................................................................39
9.2. ATC Absolute Temperature Calibration, 3-point calibration.............................40
9.3. Change-over of the key mode.................................................................43
9.4. Remote control: activate – deactivate..............................................................43
9.5. Interface - Baud rate, Handshake, Parity.........................................................44
9.6. Control parameters – Xp, Tv, Tn......................................................................45
9.7. Reset................................................................................................................46
10. Troubleshooting guide / Error messages.............................................................47
11. Electrical connections ..........................................................................................50
12. Remote control.....................................................................................................51
12.1. Setup for remote control ..............................................................................51
12.2. Communication with a PC or a superordinated data system.......................51
12.3. List of commands.........................................................................................52
12.4. Status messages .........................................................................................54
12.5. Error messages............................................................................................54
13. JULABO Service – Online remote diagnosis .......................................................56
14. Cleaning / repairing the unit .................................................................................57

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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. Description
PID2
ATC
3
RS232
PUMP
SMART
The circulators are operated via the splash-proof keypad. The
implemented microprocessor technology allows to set and to store
different values that can be indicated on the MULTI-DISPLAY (LED).
Three menu keys facilitate adjusting setpoints, warning and safety
functions and menu functions.
The PID temperature control adapts the heat supplied to the thermal
requirements of the bath.
Absolute Temperature Calibration (ATC3) provides a high temperature
stability in the bath. With the 3-point calibration an offset is adjusted at
three temperatures to ensure an accurate temperature pattern at the
selected spot in the bath over the full temperature range.
Electrical connections:
The serial interface RS232 allows modern process technology without
additional interface.
Alarm output for external alarm message or control of JULABO
refrigerating baths or solenoid valve (cooling water).
The excess temperature protection conforming to IEC 61010-2-010 is
a safety installation independent from the control circuit. This
protection can be indicated and set on the MULTI-DISPLAY (LED).
The early warning system for low level signals that bath fluid needs to
be refilled before the low level protection conforming to IEC 61010-2-
010 causes a complete shut-down of the main functional elements.
The pump capacity (electronically adjustable via the motor speed)
enables to adapt to varying conditions for internal and external
temperature applications.
The circulator conforms to the relevant requirements specified by
European guidelines.

Operator responsibility – Safety recommendations
6
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.
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
07823 / 51-0
07823 / 2491
|[email protected]
Þwww.julabo.de
Safety instructions for the operator:
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.

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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.
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:
If this unit is intended for use within the United States of America, all 3 warning labels
must be affixed to the housing of the unit prior to use.
Directions for the positioning of the individual warning labels are enclosed with the
warning labels included in the delivery.Warning labels must be easily visible to users.
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
3 Warning label Proposition 65
Particular care and attention is necessary because of the wide operating range.
There are thermal dangers:
Burn, scald, hot steam, hot parts and surfaces that can be touched.

Operator responsibility – Safety recommendations
8
Warning label W26: Colors: yellow, black
Hot surface warning.
(The label is put on by JULABO)
Observe the instructions in the manuals for instruments of a different make that you
connect to the circulator, particularly the respective safety recommendations. Also
observe the pin assignment of plugs and technical specifications of the products.
2.1. Disposal
The circulator contains a back-up battery that supplies voltage to the memory chips
when the unit is switched off. Do not dispose of the battery with household waste!
Depending on battery regulations in your country, you may be obligated to return used
or defective batteries to collection sites.
The product may be used with oil as a bath fluid. These oils fully or partially consist of
mineral oil or synthetic oil. For disposal, follow the instructions in the material safety
data sheets.
This unit contains the refrigerants R134a, R404A and R507–, which at this time are
not considered harmful to the ozone layer. However, over the long operating period of
the unit, disposal rules may change. Therefore, only qualified personnel should handle
the 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 product described in the operating instructions conforms to the
requirements of the following European guidelines:
Low voltage regulations with respect to legal harmonization of the member countries
concerning electric devices for use within certain voltage limits.
EMC guideline with respect to legal harmonization of the member countries
concerning electromagnetic compatibility.
JULABO Labortechnik GmbH
Eisenbahnstr. 45
77960 Seelbach / Germany
2.3. Warranty conditions
JULABO Labortechnik GmbH warrants its products against defects in material or in
workmanship, when used under appropriate conditions and in accordance with
appropriate operating instructions
for a period of ONE YEAR.
Extension of the warranty period – free of charge
With the ‘1PLUS warranty’ the user receives a free of charge extension to the warranty
of up to 24 months, limited to a maximum of 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.
JULABO Labortechnik GmbH reserves the right to decide the validity of any warranty
claim. In case of faults arising either due to faulty materials or workmanship, parts will
be repaired or replaced free of charge, or a new replacement unit will be supplied.
Any other compensation claims are excluded from this guarantee.

Operator responsibility – Safety recommendations
10
2.4. Technical specifications
F12-MC F25-MC
Working temperature range °C -20 ... 200 -28 ... 200
Temperature stability °C ±0,01 ±0,01
Temperature selection digital
via keypad indication on MULTI-DISPLAY(LED)
remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID2
Heater wattage (at 230 V) kW 2,0 2,0
Heater wattage (at 115 V) kW 1,0 1,0
Cooling capacity
Medium ethanol
°C
kW
+20 0 -20
0.16 0.1 0.02
+20 0 -20
0.26 0.2 0.06
Refrigerant R134a R134a
Electronically adj. pump capacity stages 1 ... 4
Flow rate at 0 bar l/min 11 ... 16
Max. pressure at 0 liters bar 0.23 ... 0.45
Electrical connections:
External alarm output 24-0 Vdc / max. 25 mA
Computer interface RS232
Overall dimensions (WxDxH) cm 20x36x56 23x42x61
Bath opening (WxL) cm 13x15 12x14
Bath depth cm 13 14
Filling volume from ... to liters 3 ... 4,5 3 ... 4,5
Weight kg 23 31
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50 207-253 / 50
Current draw (at 230 V) A 11 12
Current draw (at 230 V) CH A <9 + 1> <9 + 2>
Mains power connection 230 V/60 Hz V/ Hz 207-253 / 60 207-253 / 60
Current draw (at 230 V) A 11 12
Mains power connection 115 V/60 Hz V/ Hz 103-127 / 60 103-127 / 60
Current draw (at 115 V) A 12 13
Mains power connection 100 V/50-60 Hz V/ Hz 90-120 / 50-60 90-115 / 50-60
Current draw (at 100 V) A 15 13
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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F26-MC F32-MC
Working temperature range °C -28 ... 200 -35 ... 200
Temperature stability °C ±0,01 ±0,01
Temperature selection digital
via keypad indication on MULTI-DISPLAY(LED)
remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID2
Heater wattage (at 230 V) kW 2,0 2,0
Heater wattage (at 115 V) kW 1,0 1,0
Cooling capacity
Medium ethanol
°C
kW
+20 0 -20
0.26 0.2 0.06
+20 0 -20
0.45 0.39 0.15
Refrigerant R134a R134a
Electronically adj. pump capacity stages 1 ... 4
Flow rate at 0 bar l/min 11 ... 16
Max. pressure at 0 liters bar 0.23 ... 0.45
Electrical connections:
External alarm output 24-0 Vdc / max. 25 mA
Computer interface RS232
Overall dimensions (WxDxH) cm 42x42x42 31x42x64
Bath opening (WxL) cm 12x14 18x12
Bath depth cm 14 15
Filling volume from ... to liters 3 ... 4,5 5,5 ... 8
Weight kg 31 37
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50 207-253 / 50
Current draw (at 230 V) A 12 13
Mains power connection 230 V/60 Hz V/ Hz ----- 207-253 / 60
Current draw (at 230 V) A ----- 10
Mains power connection 115 V/60 Hz V/ Hz ----- 103-127 / 60
Current draw (at 115 V) A ----- 14
Mains power connection 100 V/50-60 Hz V/ Hz ----- 90-115 / 50-60
Current draw (at 100 V) A ----- 14
All measurements have been carried out at:
rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

Operator responsibility – Safety recommendations
12
F33-MC F34-MC
Working temperature range °C -30 ... 200 -30 ... 150
Temperature stability °C ±0,01 ±0,01
Temperature selection digital
via keypad indication on MULTI-DISPLAY(LED)
remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID2
Heater wattage (at 230 V) kW 2,0 2,0
Heater wattage (at 115 V) kW 1,0 1,0
Cooling capacity
Medium ethanol
°C
kW
+20 0 -20 -30
0.5 0.32 0.12 0.03
+20 0 -20 -30
0.45 0.32 0.14 0.03
Refrigerant
R134a R134a
Electronically adj. pump capacity
stages
1 ... 4
Flow rate at 0 bar l/min 11 ... 16
Max. pressure at 0 liters bar 0.23 ... 0.45
Electrical connections:
External alarm output 24-0 Vdc / max. 25 mA
Computer interface RS232
Overall dimensions (WxDxH) cm 36x46x69 38x58x62
Bath opening (WxL) cm 23x14 24x30
Bath depth cm 20 15
Filling volume from ... to liters 12 ... 16 14 ... 20
Weight kg 44 42
Ambient temperature °C 5 ... 40 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50 207-253 / 50
Current draw (at 230 V) A 12 12
Current draw (at 230 V) CH A ----- <9 + 2>
Mains power connection 230 V/60 Hz V/ Hz 207-253 / 60 207-253 / 60
Current draw (at 230 V) A 12 13
Mains power connection 115 V/60 Hz V/ Hz 103-127 / 60 103-127 / 60
Current draw (at 115 V) A 15 14
Mains power connection 100 V/50-60 Hz V/ Hz 90-110/50-60Hz -----
Current draw (at 100 V) A 15 -----
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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FP35-MC
Working temperature range °C -35 ... 150
Temperature stability °C ±0,01
Temperature selection digital
via keypad indication on MULTI-DISPLAY(LED)
remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID2
Heater wattage (at 230 V) kW 2,0
Heater wattage (at 115 V) kW 1,0
Cooling capacity
Medium ethanol
°C
kW
+20 0 -20 -30
0.45 0.39 0.15 0.05
Refrigerant
R134a
Electronically adj. pump capacity stages 1 ... 4
Flow rate at 0 bar l/min 11 ... 16
Max. pressure at 0 liters bar 0.23 ... 0.45
Electrical connections:
External alarm output 24-0 Vdc / max. 25 mA
Computer interface RS232
Overall dimensions (WxDxH) cm 31x42x64
Bath opening (WxL) cm 18x12
Bath depth cm 5
Filling volume from ... to liters 1,7 ... 2.5
Weight kg 37
Ambient temperature °C 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50
Current draw (at 230 V) A 12
Mains power connection 230 V/60 Hz V/ Hz 207-253 / 60
Current draw (at 230 V) A 12
Mains power connection 115 V/60 Hz V/ Hz 103-127 / 60
Current draw (at 115 V) A 14
Mains power connection 100 V/50-60 Hz V/ Hz 90-110/50-60Hz
Current draw (at 100 V) A 14
All measurements have been carried out at:
rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

Operator responsibility – Safety recommendations
14
FP40-MC
Working temperature range °C -40 ... 200
Temperature stability °C ±0,01
Temperature selection digital
via keypad indication on MULTI-DISPLAY(LED)
remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID2
Heater wattage (at 230 V) kW 2,0
Heater wattage (at 115 V) kW 1,0
Cooling capacity
Medium ethanol
°C
kW
+20 0 -20 -40
0.68 0.5 0.32 0.04
Refrigerant R404A
Electronically adj. pump capacity stages 1 ... 4
Flow rate at 0 bar l/min 11 ... 16
Max. pressure at 0 liters bar 0.23 ... 0.45
Electrical connections:
External alarm output 24-0 Vdc / max. 25 mA
Computer interface RS232
Overall dimensions (WxDxH) cm 37x46x69
Bath opening (WxL) cm 23x14
Bath depth cm 20
Filling volume from ... to liters 9 ... 16
Weight kg 48
Ambient temperature °C 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50
Current draw (at 230 V) A 13
Current draw (at 230 V) (CH) A 9+3
Mains power connection 230 V/60 Hz V/ Hz 207-253 / 60
Current draw (at 230 V) A 13
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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FP(W)50-MC
Working temperature range °C -50 ... 200
Temperature stability °C ±0,01
Temperature selection digital
via keypad indication on MULTI-DISPLAY(LED)
remote control via personal computer indication on monitor
Temperature indication MULTI-DISPLAY (LED)
Resolution °C 0.1
Absolute Temperature Calibration °C ±3
Temperature control PID2
Heater wattage (at 230 V) kW 2,0
Heater wattage (at 115 V) kW 1,0
Cooling capacity
Medium ethanol
°C
kW
+20 0 -20 -30
0.9 0.8 0.5 0.16
Refrigerant
R404A / R507
Electronically adj. pump capacity stages 1 ... 4
Flow rate at 0 bar l/min 11 ... 16
Max. pressure at 0 liters bar 0.23 ... 0.45
Electrical connections:
External alarm output 24-0 Vdc / max. 25 mA
Computer interface RS232
Overall dimensions (WxDxH) cm 42x49x70
Bath opening (WxL) cm 18x12
Bath depth cm 15
Filling volume from ... to liters 5,5 ... 8
Weight kg 55
Ambient temperature °C 5 ... 40
Mains power connection 230 V/50 Hz V/ Hz 207-253 / 50
Current draw (at 230 V) A 14
Current draw (at 230 V) (CH) A 9+4
Mains power connection 230 V/60 Hz V/ Hz 207-253 / 60
Current draw (at 230 V) A 14
All measurements have been carried out at:
rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

Operator responsibility – Safety recommendations
16
Safety installations according to IEC 61010-2-010:
Excess temperature protection adjustable from 0 °C ... 230 °C
Low liquid level protection float switch
Classification according to DIN 12876-1 class III
Supplementary safety installations
Early warning system for low level float switch
High temperature warning function optical + audible (in intervals)
Low temperature warning function optical + audible (in intervals)
Supervision of working sensor plausibility control
Reciprocal sensor monitoring between
working and safety sensors difference >25 °C
Alarm message optical + audible (permanent)
Warning message optical + audible (in intervals)
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.
Protection class according to IEC 60 529 IP21
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).
2.5. Cooling water connection
Cooling water pressure (IN / OUT ) max. 6 bar
Difference pressure (IN - OUT ) 3.5 to 6 bar
Cooling water temperature <20 °C

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Recommended quality of cooling water:
pH – value 7,5 to 9,0
Sulfate [SO4 2- ] < 100 ppm
Hydrocarbonate [HCO3- ] / Sulphate [SO4 2-] > 1 ppm
Hardness [Ca2+, Mg2+] / [HCO3-] > 0,5 dH
Alkalinity 60 ppm < [HCO3-] < 300 ppm
Conductivity < 500 μs / cm
Chloride (CL-) < 50 ppm
Phosphate (PO43-) < 2 ppm
Ammonia (NH3) < 0,5 ppm
Free Chlorine < 0,5 ppm
Ferri Ions (Fe3+ ) < 0,5 ppm
Mangano Ions (Mn2+) < 0,05 ppm
Carbon dioxide (CO2) < 10 ppm
Hydrosulfide (H2S) < 50 ppm
Content of oxygen < 0,1 ppm
Algae growth impermissible
Suspended solids impermissible
Notice:
Danger of corrosion of heat exchanger due to unsuitable quality of
cooling water.
•Due to its high content of lime hart water is not suitable for cooling
and causes calcination of the heat exchanger.
•Ferrous water or water containing ferrous particles will cause
formation of rust even in heat exchangers made of stainless steel.
•Chlorous water will cause pitting corrosion in heat exchangers made
of stainless steel.
•Due to its corrosive characteristics distilled and deionized water is
unsuitable and will cause corrosion of the bath. .
•Due to its corrosive characteristics sea water is not suitable.
•Due to its microbiological (bacteria) components which settle in the
heat exchanger untreated and unpurified river water and water from
cooling towers is unsuitable.
•Avoid particulate matter in cooling water.
•Avoid putrid water.
Notice: Cooling water circuit
Risk of oil leaking from the cooling circuit (compressor) of the recirculating
cooler into the cooling water in case of a fault in the circuit!
Observe the laws and regulations of the water distribution company valid in the
location where the unit is operated.

Operating instructions
18
Operating instructions
3. Operating controls and functional elements
Front view Rear view
MB
°C
°C
50 80
1200
20
1b
1a
14
23
22
25
F25
15
A
M
P
15
A
M
P
21a
24b
15b
18a
20
15
21b
19
18b
15a16
26
FPW
1a
1b
Mains power switch, illuminated for circulator
Mains power switch, illuminated for cooling machine
2 Start / stop key
3 Key for selecting the working temperature
4 Key for selecting the warning and safety values
5 Menu functions
6 Cursor keys (left or right)
7 Edit keys (increase or decrease)

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8 Enter key 1) Store value / parameter
2) Next lower menu level
9 Escape key 1) Cancel entries
2) Return to a higher menu level
Note:
After about 30 seconds, the display automatically returns to the
standard display.
10
MULTI-DISPLAY (LED) temperature indication, menu indication
11 Control indicator –Heating
12 Control indicator – Cooling (without function)
13 Control indicator – Alarm
14
Adjustable excess temperature protection according to
IEC 61010-2-010
15
15a
15b
Socket: control cable of JULABO refrigerated circulator
or output for alarm messages
16
RS232
Interface RS232 : remote control via personal computer
18a
Mains circuit breakers (resettable) 15 A
18b
Mains fuses for cooling machine, T10A
19
Selector dial for cooling machine (only F25, F26, F34)
Position "1" for operation with MC circulator.
20 Built-in mains outlet for connection of circulator
21a
21b
Mains power cable with plug for circulator
Mains power cable with plug cooling machine
22 Drain tap
23 Drain port (not on F12)
24a
24b
Pump connector: feed
Pump connector: return
25 Venting grid, removable
26 OUT
IN
Only for water cooled models FPWxx:
Cooling water OUTLET and INLET

Safety notes for the user
20
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.
•Do not stay in the area below the unit.
•Make sure you read and understand all instructions and safety