Julabo FC1200S User manual

19534811_a.doc 19.01.09
English
Operating
manual
Recirculating coolers
FC1200S FCW1200S
FC1600S FCW1600S
FC1200T FCW1200T
FC1600T FCW1600T
FCW2500T
FC600-T FC1200-T FC1600-T
Software version n 9.0
JULABO WEST
2575 Pioneer Avenue, Suite 102
Vista, CA 92081
[phone]
[phone]
|info @ julabo.com
Þwww.julabo.com
JULABO EAST
754 Roble Road, Suite 180
Allentown, PA 18109
[phone]
[phone]
|info @ julabo.com
Þwww.julabo.com
1.953.4802BU6 01/09

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 recirculating cooler and accessories and check for
damages incurred during transit. These should be reported to the
responsible carrier, railway, or postal authority, and a request for a
damage report should be made. 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

Recirculating coolers
3
Table of Contents
1. Intended use...............................................................................................4
1.1. Description .........................................................................................4
2. Operator responsibility – Safety instructions..............................................4
2.1. Disposal..............................................................................................6
2.2. Technical specifications .....................................................................7
2.3. Cooling water connection.................................................................12
3. Safety notes for the user ..........................................................................13
3.1. Explanation of safety notes ..............................................................13
3.2. Explanation of other notes................................................................13
3.3. Safety instructions ............................................................................13
4. Operating controls and functional elements.............................................15
5. Operation..................................................................................................18
5.1. Preparations .....................................................................................18
5.2. Return flow safety device .................................................................19
5.3. Bath fluids.........................................................................................20
5.4. Tubing...............................................................................................20
5.5. Power connection.............................................................................21
5.6. Filling ................................................................................................21
5.7. Draining ............................................................................................22
5.8. Connecting an external sensor ........................................................23
6. Manual operation .....................................................................................24
6.1. Switching on .....................................................................................24
6.2. Start..................................................................................................24
6.2.1. Automatic / non-automatic start mode..........................................25
6.3. Setting the setpoint temperatures ....................................................26
6.3.1. Setting the temperature................................................................26
6.3.2. Setting the control ratio for feed/return flow temperature.............27
6.3.3. Setting the safety temperatures ...................................................28
6.3.4. Low liquid level protection ............................................................28
6.4. PID control parameters ....................................................................29
7. Trouble shooting guide.............................................................................32
7.1. Other error messages ......................................................................33
8. Electrical connections ..............................................................................33
9. Remote control.........................................................................................36
9.1. Communication with a PC or data system .......................................36
9.2. List of commands .............................................................................36
9.3. Status messages..............................................................................38
9.4. Error messages ................................................................................38
10. Menu functions.........................................................................................39
10.1. Selecting/exiting the configuration level ...........................................39
10.2. Setting the parameters .....................................................................39
10.3. Adjustable parameters .....................................................................40
10.4. Selecting/exiting the calibration level ...............................................41
10.5. Calibration ........................................................................................41
11. Cleaning / repairing the unit .....................................................................44
12. WARRANTY PROVISIONS .....................................................................45

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.
JULABO recirculating coolers 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
The recirculating cooler consists of
•control unit with splash-proof keypad (microprocessor technology)
•cooling compressor
•heater
•heating/cooling bath and recirculating pump
The electronics comprises two microprocessors that provide reciprocal monitoring via
sensors for the working and safety circuit.
The actual and setpoint temperatures are permanently visible on the MULTI-DISPLAY
(LED 1 + LED 2) and thus may be easily compared.
The bath tank is located in the lower part of the unit. The cooling machine draws heat
from the bath liquid via the cooling coil (evaporator). If the setpoint lies above the
ambient temperature, the integrated heater produces more heat.
The integrated circulating pump ensures constant conditions for the external cooling
loop and provides a good circulation of the liquid in the bath tank.
The unit provides analog electrical connections and a serial interface.
Safety installations: High temperature and low temperature limits, both adjustable via
the MULTI-DISPLAY, as well as low liquid level protection.
2. Operator responsibility – Safety instructions
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 recirculating coolers and also
specifies the most important safety precautions to preclude these dangers as far as
possible.

Recirculating coolers
5
The operator is responsible for the qualification of the personnel operating the units.
¾The personnel operating the units should be regularly instructed about the dangers
involved with their job activities as well as measures to avert these dangers.
¾Make sure all persons tasked with operating, installing, and maintaining the unit
have read and understand the safety information and operating instructions.
¾When using hazardous materials or materials that could become hazardous, the
unit may be operated only by persons who are absolutely familiar with these
materials and the unit. 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 WEST
2575 Pioneer Avenue, Suite 102
Vista, CA 92081
[phone]
[phone]
|info @ julabo.com
Þwww.julabo.com
JULABO EAST
754 Roble Road, Suite 180
Allentown, PA 18109
[phone]
[phone]
|info @ julabo.com
Þwww.julabo.com
Safety recommendations for the operator
¾You received a product conceived for industrial use. Nevertheless, avoid strikes to
the housing, vibrations, damages to the keypad foil (keys, display) or
contamination.
¾Make sure the product is regularly checked for proper condition. Regularly check
(at least every 2 years) the proper condition of the mandatory, warning, prohibition
and safety labels.
¾Take care that the mains supply features a low impedance to avoid any negative
affects on the instrument being operated in the same mains.
¾This 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. a monitor). We recommend to
keep a minimum distance of 1 m.
¾Permissible ambient temperature: max. 40 °C, min. 5 °C.
¾Permissible relative air humidity: 50 % (40 °C).
¾Do not store in an aggressive atmosphere. Protect from contaminations.
¾Do not expose to sunlight.
Appropriate Operation
Only qualified personnel is authorized to perform configuration, installation,
maintenance and repairs of the water bath.

Operator responsibility – Safety instructions
6
Routine operation can also be carried out by untrained personnel who should
however be instructed by trained personnel.
Use
For the use according to the intended purpose, special material requirements have to
be respected (bath fluids). Only use non-acid and non corroding materials.
Observe all warnings for the used materials (bath fluids) and the respective
instructions (safety data sheets).
Only use the unit in well ventilated areas. The recirculating coolers are not for use in
explosive atmosphere
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
Observe the instructions in the manuals for instruments of a different make that you
connect to the recirculating cooler, particularly the corresponding safety instructions.
Also observe the pin assignment of plugs and technical specifications of the products.
2.1. Disposal
This unit contains the refrigerants R134a or R404A, 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.

Recirculating coolers
7
2.2. Technical specifications
(with T-pump) FC1200T FCW1200T
Working temperature range °C -10 ... 80 -10 ... 80
Cooling capacity °C 20 10 -10
(water-glycol) kW 0.11 0.75 0.15
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi /bar 51/3.5
Flow rate max. Lpm 28
Pump connections M16x1
Noise level, 1 m distance dBA 58 53
Filling volume l 8 ... 11
Dimensions (WxLxH) in. 18x24x19
Ambient temperature °C 5 ... 40
Shipping weight Lbs /kg 148/67 153/69
Mains power connection V/Hz 208-230/60 or 230/50
Total power consumption W 2600
(with T-pump) FC1600T FCW1600T
Working temperature range °C -15 ... 80 -15 ... 80
Cooling capacity °C 20 10 -10
(water-glycol) kW 1.45 1.05 0.25
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi /bar 51/3.5
Flow rate max. Lpm 28
with tubing connections mm dia. 13.5 / 9.5
Pump connections M16x1
Noise level, 1 m distance dBA 58 53
Filling volume l 8 ... 11
Dimensions (WxLxH) in. 18x24x19
Ambient temperature °C 5 ... 40
Shipping weight Lbs /kg 148/67 153/69
Mains power connection V/Hz 208-230/60 or 230/50
Total power consumption W 2700
All data have been determined at rated voltage and frequency
ambient temperature: 20 °C bath liquid: water-glycol

Operator responsibility – Safety instructions
8
(with T-pump) FCW2500T
Working temperature range °C -25 ... 80
Cooling capacity °C +20 +10 +5 0 -10 -20
(water-glycol) kW 2.5 2.0 1.8 1.5 0.8 0.25
Refrigerant R404A
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi /bar 51/3.5
Flow rate max. Lpm 28
Pump connections M16x1
Noise level, 1 m distance dBA 70
Filling volume l 8 ... 11
Dimensions (WxLxH) in. 18x24x19
Shipping weight Lbs/kg 164/74
Mains power connection V/Hz 230/60
Total power consumption W 2800
(with S-pump) FC1200S FCW1200S
Working temperature range °C -15 ... 80 -15 ... 80
Cooling capacity °C 20 10 5 -10
(water-glycol) kW 0.12 0.85 0.65 0.26
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi /bar 17.4/1.2
Flow rate max. l/min 22 / 15
with tubing connections mm dia. 13.5 / 9.5
Pump connections M16x1
Noise level, 1 m distance dBA 57 53
Filling volume l 8 ... 11
Dimensions (WxLxH) mm 460 x 610 x 490
Ambient temperature °C 5 ... 40
Shipping weight Lbs/kg 145/66 150/68
Mains power connection V/Hz 208-230/60 or 230/50
Total power consumption W 2800
All data have been determined at mains voltage: 230 V / 50 Hz
ambient temperature: 20 °C bath liquid: water-glycol

Recirculating coolers
9
(with S-pump) FC1600S FCW1600S
Working temperature range °C -15 ... 80 -15 ... 80
Cooling capacity °C 20 10 5 -10
(water-glycol) kW 1.55 1.15 0.9 0.36
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi 17.4
Flow rate max. l/min 22 / 15
with tubing connections mm dia. 13.5 / 9.5
Pump connections M16x1
Noise level, 1 m distance dBA 57 53
Filling volume l 8 ... 11
Dimensions (WxLxH) in. 18 x 24 x 19.3
Ambient temperature °C 5 ... 40
Shipping weight Lbs/kg 145/66 150/68
Mains power connection V/Hz 208-230/60 or 230/50
Total power consumption W 2900
(with Ju-pump) FC600 -T
Working temperature range °C -20 ... 80
Cooling capacity °C 20 10 5 -10
(water-glycol) kW 0.6 0.47 0.4 0.21
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi 7.25
Flow rate max. Lpm 20 / 14
with tubing connections mm dia 13,5/9,5
Pump connections M16x1
Noise level, 1 m distance dBA 51
Filling volume l 6 ... 8
Dimensions (WxLxH) mm 350 x 540 x 490
Ambient temperature °C 5 ... 40
Shipping weight Lbs/kg 105/48
Mains power connection V/Hz 208-230/60 or 230/50
Total power consumption W 2000
All data have been determined at rated voltage and frequency
ambient temperature: 20 °C bath liquid: water-glycol

Operator responsibility – Safety instructions
10
(with Ju-pump) FC1200 -T
Working temperature range °C -20 ... 80
Cooling capacity °C 20 10 5 -10
(water-glycol) kW 1.3 0.95 0.75 0.37
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi 7.25
Flow rate max. Lpm 20 / 14
with tubing connections mm dia. 13,5/9,5
Pump connections M16x1
Noise level, 1 m distance dBA 53
Filling volume l 8 ... 11
Dimensions (WxLxH) in. 18 x 24 x 19.3
Ambient temperature °C 5 ... 40
Shipping weight Lbs/kg 143/65
Mains power connection V/Hz 208-230/60 or 230/50
Total power consumption W 2300
(with Ju-pump) FC1600 -T
Working temperature range °C -20 ... 80
Cooling capacity °C 20 10 5 -10
(water-glycol) kW 1.65 1.25 1.0 0.47
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi 7.25
Flow rate max. Lpm 20 / 14
with tubing connections mm dia. 13,5/9,5
Pump connections M16x1
Noise level, 1 m distance dBA 53
Filling volume l 8 ... 11
Dimensions (WxLxH) in. 18 x 24 x 19.3
Ambient temperature °C 5 ... 40
Shipping weight Lbs/kg 143/65
Mains power connection V/Hz 208-230/60 or 230/50
Total power consumption W 2400
All data have been determined at rated voltage and frequency
ambient temperature: 20 °C bath liquid: water-glycol

Recirculating coolers
11
Temperature selection digital (keypad)
Resolution °C 0.1
MULTI-DISPLAY indications LED + LED
Resolution °C 0.1
Display accuracy % 0.5
Temperature stability °C ±0.2
Temperature control on/off
Control ratio for feed/return
flow temperature, adjustable % 0 ... 100
Temperature sensor (number) PTC (3)
Level indication spy-glass
Error message indication LED
Electrical connections:
Computer interface RS 232
Stand-by input conforming to Namur recommendations
Alarm output potential-free
Return flow safety device V 230
External sensor (4-lead technique) Pt100
Programmer V/mA 0 to 10 / 0 to 24
Temperature recorder (0 V = 0 °C) mV/K 10 (RI = 100 Ohms)
Safety installations
(adjustable via LED):
High temperature protection °C -25 ... 85
Low temperature protection °C -25 ... 85
Low liquid level protection float switch
Classification according to DIN 12876-1 III
Overload protection for pump motor contactor
Overload protection for cooling compressor contactor
Alarm signal optical + audible
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 atmosphere
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).

Operator responsibility – Safety instructions
12
2.3. Cooling water connection
Only for water cooled models - FCW:
Cooling water pressure (IN / OUT ) max. 6 bar
Difference pressure (IN - OUT ) 3.5 to 6 bar
Cooling water temperature <20 °C
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.

Recirculating coolers
13
3. Safety notes for the user
3.1. Explanation of safety notes
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).”
The danger is classified using a signal word.
Read and follow these important instructions.
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.
3.2. Explanation of other notes
Note!
Draws attention to something special.
Important!
Indicates usage tips and other useful information.
3.3. Safety instructions
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 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 instrument on an even surface on a pad made of non-
inflammable material.
•Never operate the unit without bath fluid in the bath.

Safety notes for the user
14
•The instrument is not suited for unsupervised continuous operation.
•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.
•Do not drain the bath fluid while it is hot or cold!
Check the temperature of the bath fluid prior to draining (by
switching the unit on for a short moment for example).
•Use suitable connecting tubing.
•Avoid sharp bends in the tubing, and maintain a sufficient distance
from surrounding walls.
•Make sure that the tubing is securely attached.
•Regularly check the tubing for material defects (e.g., for cracks).
•Never operate damaged or leaking equipment.
•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 equipment with damaged mains power cables.
•Repairs are to be carried out only by qualified service personnel.
WARNING
This product contains chemicals known to the state of California to
cause cancer, birth defects or other reproductive harm.

Recirculating coolers
15
4. Operating controls and functional elements
1. Mains power switch, illuminated
7. Filling funnel
8. Drain tubing
9. Drain tap
10. Filling level indication
11. Pump pressure gauge
10.
7.
11.
8.
9.
1.
2. MULTI-Display temperature indication (LED 1 + LED 2)
3. Indicator lights
Alarm
Heating
Cooling
Temp.
Control
= Keypad control mode
= Remote control mode

Operating controls and functional elements
16
4. Keys for actual values (LED 1)
A Key - Indication of feed temperature
B Key - Indication of return temperature
C Key - Indication of safety temperature
4.1 Key - Indication of actual temperature of external sensor
4.2 The "MENUE" key is not required for normal operating
4.3
The key "SPEC" is not required for this model version.
5. Keys for setpoint values (LED 2)
E Key - Indication or setting of working temperature
F Key - Indication or setting of high temperature
G Key - Indication or setting of low temperature
H Key - Indication or setting of control ratio for feed/return
flow temperature
J Key - Circulating pump On/Off
5.1 Key - "SPEC" - PID control parameters
5.2 Cursors left/right
5.3 Edit keys (increase/decrease setting)
5.4 Enter key (start, store)
6. Electrical connectors
ON K ML
O Programmer input and temperature recorder output
N Connector for external Pt100 sensor
K Interface RS 232
M Alarm output (for external alarm signal)
L Stand-by input conforming to NAMUR recommendations
(external emergency switch-off)

Recirculating coolers
17
Rear
12.1 Pump connector: Feed
12.2 Pump connector: Return
13. Overflow port for bath tank
14. Connectors for solenoid valves
15. Mains power cable with plug
!
16.2
12.1 16.1
12.2
13.
14.
Only for water cooled models:
16.1 Cooling water OUTLET
16.2 Cooling water INLET

Operation
18
5. Operation
5.1. Preparations
12.1 12.2
M16x1
!
13.
14.
16.2
12.1
16.1
12.2
16.1 16.2
¾"
•Place the unit in an upright position.
•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 rejects to the environment. (Max.
permissible ambient temperature: 35 °C).
For a fault (leakage) in the refrigeration system, the
standard EN 378 prescribes a certain room space to
be available for each kg of refrigerant.
> For 0.25 kg of refrigerant R134a, 1 m3 of space is
required.
•Keep at least 20 cm of open space on the front and
rear venting grids.
•Do not set up the unit in the immediate vicinity of heat
sources and do not expose to sun light.
•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.
•Connect the tubings for cooling the external system to
the pump connectors for feed and return (12.1. and
12.2.) on the rear of the recirculating cooler.
Return flow safety device see page 19
•If necessary, connect a tube to the overflow port (13.)
for controlled draining of the liquid.
Do not close the overflow port.
•Only for water cooled models:
Ensure circulation of cooling water by connecting the
tubing to cooling water inlet (16.2.) and outlet (16.1)
on the rear of the recirculating cooler.
Cooling water temperature: <20 °C
Quality of cooling water see page 12.
Caution:
Securely attach all tubing to prevent slipping.

Recirculating coolers
19
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.
5.2. Return flow safety device
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..
In case the system to be cooled is located at a higher
level than the recirculating cooler, prevent the bath
liquid from flowing back when the unit is turned off.
For this purpose, connect electrical solenoid valves or
mechanical shut-off valves to the connectors for feed
and return (12.1. and 12.2.).
The solenoid valve is electrically connected to the
connectors (14.). As soon as the recirculating cooler is
switched off, the valves close automatically. (Filling -
see page 21)
Order No. 8 980 701 Set of solenoid valve (230 V)
13.
12.
112. 2
14.

Operation
20
5.3. 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.
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.
Water: - No liablity for use with water.
Danger of freezing at working temperatures <5 °C.
Recommended bath fluids:
Bath fluids Temperature range
soft/decalcified water 5 °C to 80 °C
See website for list of recommended bath fluids.
Contact: see page 5
5.4. 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.
Maximum pressure
Chloroprene tubing
Textile reinforced tubing
0.5 bar
4.5 bar