Page 1
19514802.doc 31.01.11
English
Operating
manual
Recirculating coolers
FC600 FC600S FCW600 FCW600S
FC1200 FC1200S FCW1200 FCW1200S
FC1600 FC1600S FCW1600 FCW1600S
air-cooled water cooled
Software version n 9.0
JULABO Labortechnik GmbH
77960 Seelbach / Germany
+49 (0) 7823 / 51-0
+49 (0) 7823 / 24 91
| [email protected]
Þ www.julabo.de
1.951.4802 01/11
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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
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
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Recirculating coolers
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Table of Contents
1. Intended use...............................................................................................4
1.1. Description .........................................................................................4
2. Operator responsibility – Safety instructions..............................................4
2.1. Disposal..............................................................................................6
2.2. EC Conformity ....................................................................................7
2.3. Warranty conditions............................................................................7
2.4. Technical specifications .....................................................................8
2.5. Cooling water connection .................................................................11
3. Safety notes for the user ..........................................................................12
3.1. Explanation of safety notes ..............................................................12
3.2. Explanation of other notes................................................................12
3.3. Safety instructions ............................................................................12
4. Operating controls and functional elements.............................................14
5. Operation..................................................................................................17
5.1. Preparations .....................................................................................17
5.2. Return flow safety device .................................................................18
5.3. Bath fluids.........................................................................................19
5.4. Tubing...............................................................................................19
5.5. Power connection.............................................................................20
5.6. Filling ................................................................................................20
5.7. Draining ............................................................................................21
6. Manual operation .....................................................................................22
6.1. Switching on .....................................................................................22
6.2. Start ..................................................................................................22
6.2.1. Automatic / non-automatic start mode..........................................23
6.3. Setting the setpoint temperatures ....................................................24
6.3.1. Setting the temperature................................................................24
6.3.2. Setting the control ratio for feed/return flow temperature.............25
6.3.3. Setting the safety temperatures ...................................................26
6.3.4. Low liquid level protection ............................................................26
6.4. PID control parameters ....................................................................27
7. Trouble shooting guide.............................................................................29
7.1. Other error messages ......................................................................30
8. Electrical connections ..............................................................................30
9. Remote control .........................................................................................32
9.1. Communication with a PC or data system .......................................32
9.2. List of commands .............................................................................33
9.3. Status messages..............................................................................34
9.4. Error messages ................................................................................34
10. Menu functions .........................................................................................35
10.1. Selecting/exiting the configuration level ...........................................35
10.2. Setting the parameters .....................................................................35
10.3. Adjustable parameters .....................................................................36
11. Cleaning / repairing the unit .....................................................................37
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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.
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Recirculating coolers
5
The operator is responsible for the qualification of the personnel operating the units.
¾ 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.
¾ Make sure all persons tasked with operating, installing, and maintaining the unit have read
and understand the safety information and operating instructions.
¾ When 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 Labortechnik GmbH
Eisenbahnstraße 45
77960 Seelbach / Germany
Tel. +49 (0) 7823 / 51-0 [email protected]
Fax +49 (0) 7823 / 24 91 www.julabo.de
Safety recommendations for the operator
¾ You received a product conceived for industrial use. Nevertheless, avoid strikes to the
housing, vibrations, damages to the keypad foil (keys, display) or contamination.
¾ Make 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.
¾ Take care that the mains supply features a low impedance to avoid any negative affects
on the instrument being operated in the same mains.
¾ This unit is designed for operation in a controlled electromagnetic environment. This
means that transmitting devices (e.g. cellular phones) should not be used in the
immediate vicinity. Magnetic radiation may influence other units with components
susceptible to magnetic fields (e.g. a monitor). We recommend to keep a minimum
distance of 1 m.
¾ Permissible ambient temperature: max. 40 °C, min. 5 °C.
¾ Permissible relative air humidity: 50 % (40 °C).
¾ Do not store in an aggressive atmosphere. Protect from contaminations.
¾ Do not expose to sunlight.
Appropriate Operation
Only qualified personnel is authorized to perform configuration, installation, maintenance and
repairs of the water bath.
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
Page 6
Operator responsibility – Safety instructions
6
(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 (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
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.
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
crossedout 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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Recirculating coolers
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2.2. EC Conformity
The products described in the operating instructions conform 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.
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Operator responsibility – Safety instructions
8
2.4. Technical specifications
FC(W)600 FC(W)600S
Working temperature range °C -20 ... 80 -10 ... 80
Cooling capacity °C 20 5 -10 20 5 -10
(water-glycol) kW 0.6 0.4 0.21 0.5 0.3 0.1
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. psi 7.25 17.4
Flow rate max. Lpm 20 / 14 22 / 15
with tubing connections mm dia 13,5/9,5 13,5/9,5
Pump connections M16x1 M16x1
Noise level, 1 m distance dBA 51 54
Filling volume l 6 ... 8
Dimensions (WxLxH) mm 350 x 540 x 490
Ambient temperature °C 5 ... 40
Shipping weight kg 48 52
Mains power connection V/Hz 230/50 or 208 - 230 / 60
Total power consumption W 2000 2300
FC(W)1200 FC(W)1200S
Working temperature range °C -20 ... 80 -15 ... 80
Cooling capacity °C 20 5 -10 20 5 -10
(water-glycol) kW 1.3 0.75 0.37 1.2 0.65 0.26
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. bar 0.5 1.2
Flow rate max. l/min 20 / 14 22 / 15
with tubing connections mm ∅ 13,5/9,5 13,5/9,5
Pump connections M16x1 M16x1
Noise level, 1 m distance dBA 53 57
Filling volume l 8 ... 11
Dimensions (WxLxH) mm 460 x 610 x 490
Ambient temperature °C 5 ... 40
Shipping weight kg 60 66
Mains power connection V/Hz 230/50 or 208 - 230 / 60
Total power consumption W 2300 2800
All data have been determined at mains voltage: 230 V / 50 Hz
ambient temperature: 20 °C bath liquid: water-glycol
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Recirculating coolers
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FCW1600 FCW1600S
Working temperature range °C -20 ... 80 -15 ... 80
Cooling capacity °C 20 5 -10 20 5 -10
(water-glycol) kW 1.65 1.0 0.47 1.55 0.9 0.36
Refrigerant R134a
Heater capacity kW 1.2
Pump capacity:
Pressure max. bar 0.5 1.2
Flow rate max. l/min 20 / 14 22 / 15
with tubing connections mm ∅ 13,5/9,5 13,5/9,5
Pump connections M16x1 M16x1
Noise level, 1 m distance dBA 53 57
Filling volume Liters 8 ... 11
Dimensions (WxLxH) mm 460 x 610 x 490
Ambient temperature °C 5 ... 40
Shipping weight kg 65 66
Mains power connection V/Hz 230/50 or 230 / 60
Total power consumption W 2400 2900
All data have been determined at mains voltage: 230 V / 50 Hz
ambient temperature: 20 °C bath liquid: water-glycol
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
Page 10
Operator responsibility – Safety instructions
10
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 compressorcontactor
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 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).
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Recirculating coolers
11
2.5. 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.
Page 12
Safety notes for the user
12
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.
• The instrument is not suited for unsupervised continuous operation.
• Do not stay in the area below the unit.
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Recirculating coolers
13
• 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.
Page 14
Operating controls and functional elements
14
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
Page 15
Recirculating coolers
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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
4.2 The "MENUE" key is not required for normal operating
4.1
The keys "EXT" and "SPEC" are not required for
4.3
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
KML
K Interface RS 232
M Alarm output (for external alarm signal)
L Stand-by input conforming to NAMUR recommendations
(external emergency switch-off)
Page 16
Operating controls and functional elements
16
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
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Recirculating coolers
17
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: 40 °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 18
• 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 11.
Caution:
Securely attach all tubing to prevent slipping.
Page 18
Operation
18
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 20)
Order No. 8 980 701 Set of solenoid valve (230 V)
13.
12.
1
12.
2
14.
Page 19
Recirculating coolers
19
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
Page 20
Operation
20
5.5. Power connection
Caution:
• Only connect the unit to a power socket with earthing contact (PE – protective
earth)!
We disclaim all liability for damage caused by incorrect line voltages!
• 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).
Make sure that the line voltage and frequency match the supply voltage specified
on the type plate.
5.6. Filling
MIN
MAX
0
1
2
3
4
5
6
• Connect the tubing from the external system to the pump
connectors and check for leaks.
• Hold the venting grid, pull out and remove.
• Check to make sure that the drain tap (9.) is closed.
• Move the filling funnel (7.) to the front and remove cap.
• Fill the bath tank and take care of the filling level (10.).
Activating the circulating pump with simultaneous filling of the
external system.
• Turn the mains switch (1.) on
(Switching on - see page 22).
• Press the key "J"
to activate the
pump for filling the cooling loop for the external system.
In case return flow safety devices (Set of solenoid valve)
are connected to the connectors (14.) those will
simultaneously be opened.
• Check the filling level (10.) and keep on filling the bath
liquid using the funnel until you get within the level marked
"MAX".
• Close the filling funnel and move it to the back.
• Replace the venting grid.
MIN
MAX
1.
M I N
M A X
10.
9.
7.
Page 21
Recirculating coolers
21
5.7. Draining
Notice:
¾ 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).
¾ Store and dispose of the used bath fluid according to the environmental
protection laws.
MIN
MAX
0
1
2
3
4
5
6
1.
MIN
MAX
0
1
2
3
4
5
6
1.
9.
8.
• Turn the mains switch (1.) off.
• Hold the venting grid, pull out and remove.
• Take the drain tubing (8.) out of the holder and hold it into
a pail.
• Open the drain tap (9.) and empty the unit completely.
• Close the drain tap and replace the drain tubing into the
holder.
• Replace the venting grid.
MIN
MAX
0
1
2
3
4
5
6
9.
8.
1.
In case the recirculating cooler is placed on the floor, the
unit may be drained using a suction pump unit.
• Connect the drain tubing (8.) to the suction pump unit.
• Open the drain tap (9.).
• Switch the pump on and fully empty the unit.
Page 22
Manual operation
22
6. Manual operation
6.1. Switching on
ACTUAL
SET
Ø Ø
Ø Ø
Turn on the mains power switch (1.).
An illuminated switch indicates the unit is on.
The unit performs a self-test. All segments of the
4-digit MULTI-DISPLAY (LED 1 + LED 2) and all indicator
lights will illuminate.
Then the model designation and software version appear
on the MULTI-DISPLAY for about 3 seconds
(Example: FC"1200", "n 9.0").
The display "OFF" indicates the recirculating cooler is
ready to operate (rOFF - see page 32).
6.2. Start
ACTUAL
SET
Actual value Setpoint
• Press the Enter key (5.4) for about 2 seconds.
The MULTI-DISPLAY (LED 1) indicates the actual feed
temperature (example: 20.3 °C).
The MULTI-DISPLAY (LED 2) indicates the setpoint for the
bath temperature
(example: -5.0 °C).
The indicator lights signal the actual operating mode.
- Display Feed temperature (A)
- Display Setpoint bath temperature (E)
- Circulating pump On (J)
- Status Cooling on 7
- Control Internal temperature control
- Mode Keypad control mode
Page 23
Recirculating coolers
23
6.2.1. Automatic / non-automatic start mode
NOTE:
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“ or „rOFF“, resp. on the MULTI-DISPLAY (LED). A complete shutdown of
the main functional elements such as heater and circulation 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 recirculating cooler directly by pressing
the mains power switch or using a timer.
Activating/deactivating AUTOSTART
1. Turn on the recirculating cooler with the mains power
switch
and
press the Enter key to start operation.
2. Simultaneously press the safety temperature key (C)
and the MENUE key (4.2) to enter the setting mode.
Press the edit key
to select the parameter on the
MULTI-DISPLAY (LED2).
„1“ - AUTOSTART off.
„0“ - AUTOSTART on.
Press the Enter key to store the parameter.
3. Simultaneously press the safety temperature key (C)
and the MENUE key (4.2) to exit the setting mode.
The AUTOSTART function (automatic start mode)
allows the start of the recirculating cooler directly by
pressing the mains power switch or using a timer.
Warning:
For supervised or unsupervised operation with the AUTOSTART function,
avoid any hazardous situation to persons or property.
The recirculating cooler does no longer conform to N.A.M.U.R.
recommendations.
Take care you fully observe the safety and warning functions of the
recirculating cooler.
Page 24
Manual operation
24
6.3. Setting the setpoint temperatures
Set the setpoints before or after starting the unit.
Press the setpoint keys (E, F, G, H) to set a value and
press the Enter key to store the value.
The values will stay in memory when the recirculating
cooler is powered down.
6.3.1. Setting the temperature
Example: Setting the bath temperature
ACTUAL
SET
ACTUAL
SET
n Press the setpoint key
.
The indicator light blinks and the value previously set
appears on the MULTI-DISPLAY (LED) (example: -
10.8 °C)..
o Use the cursor keys to move left or right on
the display until the numeral you wish to change is
blinking.
p Use the increase/decrease arrows to change
the selected numeral (-, 0, 1, 2, 3, ... 9).
q Press enter to store the selected value
(example: -8.0 °C).
Page 25
Recirculating coolers
25
6.3.2. Setting the control ratio for feed/return flow temperature
50 (%)
21°C 22°C20°C
-0.5°C +0.5°C
50
50
0 .. 100 (%)
21°C
22.5°C
20°C
0 100
H
ACTUAL
SET
In respect to the values for feed and return temperature
and the factor set with the key "H" an almost constant
temperature value may be maintained in the external
system. The control function quickly responds to changing
conditions (ambient temperature, reaction heat), and thus
spares the use of an external sensor.
The control ratio for feed and return flow temperature is
factory preset to "50:50".
For enabling optimum control performance for asymmetric
experiments, this ratio may be adjusted from 0 to 100 %.
0 % control with full respect
to feed temperature
100 % control with full respect
to return temperature.
Setting:
n
Press the key .
Follow the instructions under section 6.3.1.
page 24
o
p
q
A B H
40 (%)
21°C
22.5°C
20°C
40
Calculation example:
Look up the values for control ratio, actual feed and return
temperatures on the display by pressing the keys (A, B,
H).
Example: ϑ
RETURN
= 22.5 °C
ϑ
FEED
= 20 °C
factor = 40 %
Formula for calculating the actual value:
100
)100(
100
*
factorfactor
FEEDRETURNACT
−
∗+=
ϑϑϑ
ϑ
ACT
CC=° +°
−
22 5
40
100
20
100 40
100
.
()
ϑ
A
CT
C
=
°21
Page 26
Manual operation
26
6.3.3. Setting the safety temperatures
F G
)
This safety function is independent of the control circuit.
n
Press the desired setpoint key (F, G).
Follow the instructions under section 6.3.1.
page 24
o
p
q
Recommendation:
Set the high temperature limit at least 5 K above the actual
bath temperature.
Set the low temperature limit at least 5 K below the setpoint.
+
ACTUAL
SET
When the temperature of the bath liquid reaches the limits of
the safety values, a complete shutdown of the circulating
pump, heater and cooling compressor is effected.
The alarm light illuminates and an audible signal is
triggered. An error message appears on the MULTIDISPLAY (LED 2)
(see page 29).
Turn the mains switch (1.) off and on. The alarm state is
cancelled and the circulator is put back into operation.
(Switching on - see page 22).
6.3.4. Low liquid level protection
+
ACTUAL
SET
As soon as the bath liquid falls below the "MIN" level
(10.), a complete shutdown of the circulating pump,
heater, and cooling compressor is effected.
The alarm light illuminates and an audible signal is
triggered. An error message appears on the MULTIDISPLAY (LED 2)
(see page 29).
Page 27
Recirculating coolers
27
6.4. PID control parameters
For internal and external control two separate parameter
sets are available.
The PID control parameters can be adapted to the
requirements of the controlled member.
The values are preserved after switching off the
recirculating cooler.
SET
ACTUAL
SET
• The control parameters are indicated by operating the
key (5.1).
Indications in case of internal control INT:
Parameter Setting range
CP 1 Xp (example 4.0 K). 0.1 ... 100 K
CP 2 Tn (example 160 s). 1 ... 9999 s
CP 3 Tv (example 20 s). 0 ... 500 s
Each indicated control parameter can be optimized
manually .
Setting
:
n
Operate the key as often until the desired control
parameter is indicated. Example: CP3
o Use the cursor keys to move left or right on
the display until the numeral you wish to change is
blinking.
p Use the increase/decrease arrows to
change the selected numeral (-, 0, 1, 2, 3, ... 9).
q Press enter to store the selected value
Page 28
Manual operation
28
Optimization instructions for the PID
control parameters:
The heat-up curve reveals inappropriate
control settings
optimum setting
Inappropriate settings may produce the
following heat-up curves:
Xp too low
Tv/Tn too low
Xp
or
Tv too high
Page 29
Recirculating coolers
29
7. Trouble shooting guide
+
ACTUAL
SET
Whenever the microprocessor electronics registers a
failure, an alarm is triggered and a complete shutdown is
performed.
The alarm light illuminates and an audible signal is
triggered. An error message appears on the MULTIDISPLAY (LED 2).
Internal error
High temperature alarm
Low temperature alarm
The values reported by the safety sensor and the sensor in
the feed connector differ by more than 25 K (defective
sensor).
Low liquid level alarm
⎫
⎪
⎪
⎬ Internal errors
⎪
⎪
⎭
Pump disconnection
Compressor disconnection
Heater disconnection
Turn the unit off with the mains switch (1), and eliminate the
malfunction. If the unit cannot be returned to operation,
contact an authorized service station.
Page 30
Electrical connections
30
7.1. Other error messages
ACTUAL
SET
Incorrect/invalid entry. Value too small or too large, or
function not available.
Under menu item E_Sb the parameter is set to 1, and
the connection between Pin 2 and Pin 3 of the standby connector is interrupted (see page 30).
8. Electrical connections
Notice: Use shielded cables only.
The shield of the connecting cable is electrically connected to the plug housing.
Stand-by input (L)
1
2
3
+
AK
Ø
Pin assignment: Pin Signal
1 not used
2 5 V / DC
3 0 V
Activate the stand-by input:
Under menu item E_Sb, set the parameter to 1
(see page 36).
Connect an external contact 'AK' (e.g. for emergency switch-off)
or an alarm contact of the superordinated application system.
In case the connection between Pin 2 and Pin 3 is interrupted by
opening the contact 'AK', a complete shutdown of the circulating
pump, heater and cooling compressor is effected, and the unit
enters the condition "stand-by". The message "E_Sb" appears on
the MULTI-Display (LED2) (see page 30).
Alarm output (M)
1
2
3
This potential-free change-over contact is activated in case of an
alarm.
Pins 2 and 3 are connected under the following conditions:
- alarm
- status "OFF" and "rOFF"
- mains switch "off"
Switching capacity max. 30 W / 40 VA
Switching voltage max. 125 V∼/−
Switching current max. 1 A
Page 31
Recirculating coolers
31
Serial interface (K)
9
6
5
1
This interface is a 9-pole connector:
Pin 2 RxD Receive Data
Pin 3 TxD Transmit Data
Pin 5 Gnd
Pin 7 RTS Request to send
Pin 8 CTS Clear to send
Interface correspondence:
Circulator Computer ⏐ Circulator Computer
9-pole 25-pole ⏐ 9-pole 9-pole
Pin 2 RxD ⇔ Pin 2 TxD ⏐ Pin 2 RxD ⇔ Pin 3 TxD
Pin 3 TxD
⇔ Pin 3 RxD ⏐ Pin 3 TxD ⇔ Pin 2 RxD
Pin 5 GND
⇔ Pin 7 GND ⏐ Pin 5 GND ⇔ Pin 5 GND
Pin 7 RTS ⇔ Pin 5 CTS ⏐ Pin 7 RTS ⇔ Pin 8 CTS
Pin 8 CTS ⇔ Pin 4 RTS ⏐ Pin 8 CTS ⇔ Pin 7 RTS
Accessories:
Order No. Description
8 980 073 RS232 interface cable 9-pol./9-pol. , 2,5 m
8 900 110 USB interface adapter cable
Return flow safety device
Control connector for solenoid valves (14.)
(line voltage: 230 V).
Page 32
Remote control
32
9. Remote control
9.1. Communication with a PC or data system
ACTUAL
SET
For remote control, under the menu item OP (Operating
mode) set the parameter to 1.
The message "rOFF" appears on the display.
In general, the computer (master) sends commands to the
recirculating cooler (slave). The recirculating cooler sends
data (including error messages) only when the computer
asks for it.
A transfer sequence consists of:
• command
• space (
⇔
; Hex: 20)
• parameter (the character separating
• decimals in a group is the period)
• end of file (↵; Hex: 0D)
The commands are divided into in or out commands.
in commands: asking for parameters to be
displayed
out commands: setting parameters
)
The out commands are valid only in remote control mode.
Examples:
• Command to set the setpoint to 5.5 °C:
out_sp_00 ⇔ 5.5↵
• Command to ask for the setpoint:
in_sp_00
↵
• Response from the recirculating cooler:
↵
Page 33
Recirculating coolers
33
9.2. List of commands
Command Parameter Response of recirculating cooler
version no Number of software version
status no Status message (see below)
out_mode_04
out_mode_04
in_mode_04
0
1
no
Set control mode via PC
Set control mode via programmer input (O)
Ask for actual control mode
out_mode_05
out_mode_05
in_mode_05
0
1
no
Stop the recirculating cooler = rOFF
Start the recirculating cooler
Ask for actual condition (Start/Stop)
out_sp_00
in_sp_00
xx.x
no
Set working temperature value
Ask for working temperature value
in_sp_01 no Ask for high temperature value
in_sp_02 no Ask for low temperature value
out_sp_03
in_sp_03
xxx
no
Set control ratio for feed/return flow temperature
Ask for actual control ratio
in_pv_00 no Ask for actual feed temperature
in_pv_01 no Ask for actual temperature of external sensor
in_pv_02 no Ask for actual heater capacity
in_pv_03 no Ask for actual return temperature
in_pv_04 no Ask for actual safety temperature
out_par_06
in_par_06
x.x
x.x
Control parameter Xp of the internal controller
out = set; in = ask
out_par_07
in_par_07
xx.xx
xx.xx
Control parameter Tn of the internal controller
out = set; in = ask
out_par_08
in_par_08
xx.xx
xx.xx
Control parameter Tv of the internal controller
out = set; in = ask
Page 34
Remote control
34
9.3. Status messages
Message Description - Recirculating cooler ...
00 MANUAL STOP ... in condition "OFF" (LOCAL)
01 MANUAL START
... in keypad control mode (LOCAL)
02 REMOTE STOP ... in condition "rOFF" (RS 232)
04 REMOTE START ... in remote control mode (RS 232)
9.4. Error messages
Message Description
-01 WORKING PROCESSOR ALARM Internal error
-02 EXCESS TEMPERATURE ALARM High temperature alarm
-03 LOW TEMPERATURE ALARM Low temperature alarm
-04 SENSOR DIFFERENCE ALARM Sensor difference alarm
ϑϑ
Safety sensor
Feed
C−>°25
-05 LOW LEVEL ALARM Low liquid level alarm
-06 PROCESSOR COMMUNICATION
ERROR
Internal error
-07 I2C-BUS WRITE ERROR Internal error
-08 I2C-BUS READ ERROR Internal error
-09 I2C-BUS READ/WRITE ERROR Internal error
-10 COMMAND NOT ALLOWED IN
CURRENT OPERATING MODE
Invalid command in current operating mode
-12 VALUE TOO SMALL Value too small
-13 VALUE TOO LARGE Value too large
-14 INVALID COMMAND Invalid command
-15 WARNING: STAND-BY PLUG IS
MISSING
External stand-by plug is missing
(see page 30)
-16 WARNING: VALUE EXCEEDS
TEMPERATURE LIMITS
Value lies outside the permissible range for
the safety temperature limits. But value is
stored anyway.
-17 PUMP ERROR Pump disconnection
-18 COMPRESSOR ERROR Compressor disconnection
-19 HEATER TRIAC SHORTED Heater disconnection
Page 35
Recirculating coolers
35
10. Menu functions
Set the parameters for the recirculating cooler via the
configuration or calibration level.
10.1. Selecting/exiting the configuration level
+ 1x
+ 1x
Simultaneously press the "MENUE" key (4.2)
and
the edit key " " to select the configuration level
or
the edit key " " to exit the configuration level.
+
Select the menu items of the configuration level one by
one by pressing simultaneously the menu key and one of
the cursors.
10.2. Setting the parameters
+ 1x
ACTUAL
SET
+3x
ACTUAL
SET
Example: Baud rate
c Select the configuration level by pressing the keys
simultaneously.
d Select the menu item by pressing simultaneously the
menu key and one of the cursors.
(example: press the cursor key " " 3 times).
e Set the baud rate (4800 Bauds) with the edit keys (" "
or " ").
f Press the enter key to store the new parameter.
Page 36
Menu functions
36
10.3. Adjustable parameters
ACTUAL
SET
Set the parameters for the following menu items in the
configuration level:
OP - Operating mode
0 = Keypad control
1 = Remote control via RS 232
ACTUAL
SET
HAnd - Handshake of the serial interface
0 = XOn/XOff, software handshake
1 = RTS/CTS, hardware handshake *
ACTUAL
SET
PAr - Parity bits of the serial interface
0 = no
1 = odd
2 = even *
ACTUAL
SET
bAud - Baud rate of the serial interface
1200 Bauds
2400 Bauds
4800 Bauds*
9600 Bauds
ACTUAL
SET
E_Sb - External stand-by for emergency switch-off
0 = stand-by input is ignored *
1 = stand-by input is active
(Stand-by input - see page 30)
(* factory setting)
Page 37
Recirculating coolers
37
11. Cleaning / repairing the unit
Caution:
Always turn off the unit and disconnect the mains cable from the power source
before cleaning the unit.
Prevent humidity from entering into the circulator.
Service and repair work may be performed only by authorized electricians.
MIN
MAX
0
1
2
3
4
5
6
In order to maintain a good condition of the cooling
compressor, the condenser should be checked for
contamination in regular intervals.
• Switch the unit off, disconnect the power plug.
• Hold the venting grid, pull out and remove.
• Remove the dirt from the condenser with a vacuum
cleaner.
• Replace the venting grid.
The unit is ready to operate again.
Cleaning:
Clean the outside of the unit using a wet cloth and low surface tension
water.
The recirculating cooler 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.
Repairs:
Before asking for a service technician or returning a JULABO instrument for
repair, please contact an authorized JULABO service station.
When returning the unit:
• Clean the unit in order to avoid any harm to the service personnel
• Attach a short fault description.
• When returning a unit, take care of careful and adequate packing.
• JULABO is not responsible for damages that might occur from insufficient
packing.
JULABO reserves the right to carry out technical modifications with
repairs for providing improved performance of a unit.
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