Operating manual
Recirculating Coolers
FL20006
English
FLW20006
JULABO GmbH
77960 Seelbach / Germany
Tel. +49 (0) 7823 / 51-0
1.951.4837-V2 10/13
19514837-V2.doc Print date: 09.10.2013
Fax +49 (0) 7823 / 24 91
info@julabo.de
www.julabo.de
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 and
ISO 14001. Certificate Registration No. 01 100044846
Unpacking and inspecting
Printed in Germany Changes without prior notification reserved
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.
Important: keep operating manual for future use
2
TABLE OF CONTENTS
1. Intended use ................................................................................................................................. 4
1.1. Description ........................................................................................................................ 4
2. Operator responsibility – Safety instructions ................................................................................ 4
2.1. Installation Log for FL20006 ............................................................................................. 6
2.2. Disposal ............................................................................................................................ 6
2.3. EC Conformity ................................................................................................................... 7
2.4. Technical specifications .................................................................................................... 8
2.5. Cooling water connection ................................................................................................ 10
3. Safety notes for the user ............................................................................................................ 11
3.1. Explanation of safety notes ............................................................................................. 11
3.2. Explanation of other notes .............................................................................................. 11
3.3. Safety instructions ........................................................................................................... 11
4. Installation .................................................................................................................................. 12
4.1. Tubing ............................................................................................................................. 14
5. Operating controls and functional elements ............................................................................... 15
6. Operating procedures ................................................................................................................. 17
6.1. Bath fluids ....................................................................................................................... 17
6.2. Power connection ........................................................................................................... 17
6.3. Filling ............................................................................................................................... 18
6.4. Switching on / Start - Stop .............................................................................................. 18
6.5. Setting the feed pressure ................................................................................................ 19
6.6. Setting the temperatures ................................................................................................. 19
6.7. AUTOSTART ON / OFF .................................................................................................. 19
6.8. Remote control: activate – deactivate ............................................................................. 20
7. Safety installations...................................................................................................................... 21
7.1. Excess temperature protection ....................................................................................... 21
7.2. Low level protection ........................................................................................................ 21
8. Troubleshooting guide / Error messages .................................................................................... 21
9. Electrical connections ................................................................................................................. 23
10. Remote control .................................................................................................................. 24
10.1. Setup for remote control ................................................................................................. 24
10.2. Communication with a PC or a superordinated data system .......................................... 24
10.3. List of commands ............................................................................................................ 25
10.4. Status messages ............................................................................................................ 25
10.5. Error messages ............................................................................................................... 26
11. Cleaning / repairing the unit .............................................................................................. 27
11.1. JULABO Service – Online remote diagnosis .................................................................. 29
11.2. Draining ........................................................................................................................... 30
12. Warranty conditions .......................................................................................................... 31
13. Example Installation Log ................................................................................................... 32
3
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 water baths are not suitable for direct temperature control of foods, semiluxury 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 coolers are operated via the splash-proof keypad. The
implemented microprocessor technology allows to set and to store the setpoint that
PID1
RS232
can be indicated on the LED temperature display.
The PID temperature regulation is used to withdraw heat from the bath fluid by
means of the cooling machine and to automatically regulate the required need.
Electrical connections:
1. The serial interface RS232 allows modern process technology without
additional interface.
2. Alarm output for external alarm message.
Manually adjustable by-pass (handwheel) to reduce the pump capacity
(e. g. for glass equipment).
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 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 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 GmbH
Eisenbahnstraße 45
77960 Seelbach / Germany
Tel. +49 7823 51-0 info@julabo.de
Fax +49 7823 2491 www.julabo.de
4
Safety recommendations for the operator
You received a product developed for industrial use. Nevertheless, avoid strikes to the housing,
vibrations, damages to the keypad foil (keys, display) or contamination.
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.
Take care that the mains supply features a low impedance to avoid any negative affects on the
instrument being operated in 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 influence other units with components susceptible to magnetic fields (e.g. a
monitor). We recommend to keep a minimum distance of 1 m.
Permissible ambient temperature: max. 40 °C, min. 5 °C.
Permissible relative air humidity: 50 % (40 °C).
Do not store in an aggressive atmosphere. Protect from contaminations.
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 (safety data
sheets).
Only use the unit in well ventilated areas. (see page 12).
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
2
or
2
Observe the instructions in the manuals for instruments of a different make that you connect to the
circulator, particularly the corresponding safety instructions. Also observe the pin assignment of plugs
and technical specifications of the products.
Warning label W00: Colors: yellow, black
Danger area. Attention! Observe instructions.
(operating manual, safety data sheet)
Mandatory label M018: Colors: blue, white
Carefully read the user information prior to beginning operation.
Scope: EU
Semi S1-0701 Table A1-2 #9
Carefully read the user information prior to beginning operation.
Scope: USA, NAFTA
5
2.1. Installation Log for FL20006
EN 378-4:2008-06
Documentation
The operator is obliged to keep an installation log for the refrigeration unit if the
filling volume of the refrigerant exceeds 3 kg!
The installation log must be kept with the unit.
If the information and data is recorded on a computer, the current status must be
printed out (hard copy) and kept with the unit.
It must be assured that the log is available to an expert in case of repairs and
repeated inspections.
The installation log must include the following information:
See example on page 32
2.2. Disposal
This unit contains the refrigerant R404A, which at this time is 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
See the current official journal of the European Union – WEEE directive.
Directive of the European Parliament and of the Council 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!
6
2.3. EC Conformity
7
2.4. Technical specifications
Recirculating Cooler
Cooling
Working temperature range °C -25 ... +40 -25 … +40
Temperature stability °C ±0.5
Temperature selection: digital
via key pad indication on LED-DISPLAY
remote control via personal computer indication on monitor
Temperature indication: LED-DISPLAY
Resolution °C 0.1
Temperature control PID 1
Temperature sensor Pt 100
Excess temperature protection 85 °C - fixed value
Low liquid level protection float switch
Cooling capacity
Medium: Mixture water-glycol
Cooling compressor 1--stage
Refrigerant R404A
Electrical connections:
Computer interface RS232
Alarm output for external alarm signal
Circulating pump:
discharge, max. at 0 bar l/min 80 80
pressure, adjustable at 0 Liter bar 0.8 ... 6.0 0.8 ... 6.0
Feed pressure indication bar Manometer
Filling level indicator sight glass
Filling volume from ... to liters 15 ... 37
Dimensions (WxLxH) cm 95x115x161
Weight kg 360 330
Ambient temperature range °C 5 ... 40
Return flow temperature °C 80 max.
Cooling water
Flow rate at 15 °C inlet temperature
Noise level, 1 m distance dBA 73
IP class according to IEC 60 529 IP 21
Mains power connection 400 V/3PNPE/50 Hz V/ Hz 360-440/3PNPE /50 360-440/3PNPE /50
Current input at 400 V A 18 18
Mains power connection 230 V/3PNPE/60 Hz V/ Hz 207-253/3PPE /60 207-253/3PPE /60
Current input at 230 V A 36 36
All measurements have been carried out at: rated voltage and frequency,
ambient temperature: 20 °C
°C
kW
l/min ----- 24
FL20006 FLW20006
air cooled water coolrd
+20 0 -10 -20 +20 0 -10 -20
20.0 10.0 6.0 2.5 20.0 12.0 7.0 3.0
8
Warning functions and safety installations
Excess temperature protection 85 °C - fixed value
Low liquid level protection float switch
Alarm message optical + audible (permanent)
Excess temperature - Warning function 75 °C
Overload protection for compressor and pump motor
Classification according to DIN 12876-1 class I
Environmental conditions according to IEC 61 010-1:
Use only indoor.
Altitude up to 2000 m - normal zero.
Ambient temperature: +5 ... +40 °C
Air humidity:
Max. rel. humidity 80 % for temperatures up to +31 °C,
linear decrease down to 50 % relative humidity at a temperature of +40 °C
Max. mains fluctuations of ±10 % are permissible.
The unit corresponds to Class I
Overvoltage category II
Pollution degree 2
Caution:
The unit is not for use in explosive environment.
Standards for interference resistance according to EN 61326-1
This unit is an ISM device classified in Group 1 (using high frequency for internal purposes) Class A
(industrial and commercial range).
9
2.5. Cooling water connection
Only for water cooled models - FLW:
Cooling water pressure (IN / OUT ) max. 6 bar
Difference pressure (IN - OUT ) 2 bar to 6 bar
Flow rate on FLW 20006 typical 24.0 l/min
Cooling water temperature 15 °C
Recommended quality of cooling water:
pH – value
Sulfate [SO4 2- ]
Hydrocarbonate [HCO3- ] / Sulphate [SO4 2-]
Hardness [Ca2+, Mg2+] / [HCO3-]
Alkalinity
Conductivity
Chloride (CL-)
Phosphate (PO43-)
Ammonia (NH3)
Free Chlorine
Ferri Ions (Fe3+ )
Mangano Ions (Mn2+)
Carbon dioxide (CO2)
Hydrosulfide (H2S)
Content of oxygen
Algae growth
Suspended solids impermissible
Notice: Cooling water circuit
Risk of oil leaking from the refrigeration system (compressor) of the recirculating
cooler into the cooling water in case of a fault in the cooling water circuit!
Observe the laws and regulations of the water distribution company valid in the
location where the unit is operated.
7,5 to 9,0
< 100 ppm
> 1 ppm
> 0,5 dH
60 ppm < [HCO3-] < 300 ppm
< 500 μs / cm
< 50 ppm
< 2 ppm
< 0,5 ppm
< 0,5 ppm
< 0,5 ppm
< 0,05 ppm
< 10 ppm
< 50 ppm
< 0,1 ppm
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.
10
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.
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.
11
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.
Some parts of the bath tank and the pump connections may become extremely hot
during continuous operation. Therefore, exercise particular caution when touching
these parts.
Some parts of the bath tank and the pump connections may become extremely
cold during continuous operation. Therefore, exercise particular caution when
touching these parts.
4. Installation
Place the unit on an even surface on a base made of
nonflammable material. Using the castors (10a, 10b) move the unit
to the intended location.
For better stability, apply the holding breaks on the front casters
(10a).
Cooling machine, pump motor and electronics produce intrinsic
heat that is dissipated via the venting openings! Never cover these
openings!
Do not set up the unit in the immediate vicinity of heat sources and
do not expose to sun light.
Keep at least 20 cm of open space on the front and rear venting
grid.
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.
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 0.52 kg of refrigerant R-404A, 1 m3 of space is required.
12
Caution: Pump pressure
Determine and check the max. admissible pressure for the external circuit before
putting the unit into operation. The max. pressure is determined by the weakest
element in the circuit (e. g. glass equipment).
Securely attach all tubing to prevent slipping.
Do not seal the overflow!
Connect the tubings for cooling the external system
to the pump connectors M16x1 for feed and return
(14) on the rear of the recirculating cooler.
– Return - Feed
Connect a piece of tubing to the overflow connector
(15) and drain into a suitable vessel, which always
has to be placed lower thant the exit „Overflow“.
Do not seal the overflow connector!
Turn the adjusting valve (13) counter-clockwise to
set the lowest manometric pressure.
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.
Only water cooled models - FLW:
Ensure circulation of cooling water by connecting
the tubing to cooling water inlet (IN)and outlet (OUT)
on the rear (18) of the recirculating cooler.
Cooling water see page 9.
Cooling water connectors G3/4" external thread
¾”
Tubing 3/4" inner dia. Tubing, compression-proof
IN Cooling water inlet
OUT Cooling water outlet
Even high quality heat exchangers as they are installed
in our equipment can be damaged by unsuitable cooling
water.
The quality of the cooling water depends on the local
conditions.
The heat exchanger may become leaky due to corrosion
or it may become clogged due to particulate matter
Notice: Flood hazard!
In case the system to be cooled is located at a higher level than the recirculating
cooler, avoid possible flowback of bath liquid back when the unit is switched off.
13
Return flow safety device
If the filling volume of the bath tank is not sufficient, prevent the liquid from flowing
back by using shut-off valves..
Order No. Description
8 970 458 Shut-off valve G 1¼“ FL(W) 7006/11006/20006
The following questions shall help to recognize possible dangers and to reduce the
risks to a minimum.
Are all tubes and electrical cables connected and installed?
Note:
sharp edges, hot surfaces in operation, moving machine parts, etc.
What to do when a dangerous substance was spilled on or in the unit?
Before starting to work, obtain information concerning the substance and determine the
method of decontamination.
Suitable for
4.1. Tubing
Caution:
Employ suitable connecting tubing.
Recommended tubing:
Order No. Description
8930325 1 m Reinforced tubing 1“ inner dia. (-40 ... +120°C) FL(W) 7006/11006/20006
Tubing insulation
8930425 1 m Insulation, 35 mm inner dia. Reinforced tubing 1“ inner dia.
Tube clamps
8970484 2 Tube clamps, size 5 Reinforced tubing 1“ inner dia.
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.
Suitable for
14
5. Operating controls and functional elements
Front view Rear view
Top view
15
N
°C
1
O
Mains power switch
2.0
2.1
2.2
3.0
3.1
Keypad, spash-water protected
Edit keys (set point increase or decrease)
Enter key Store set point value / parameter
Indication
LED temperature display
3.2
3.3
Control indicator – Cooling
Control indicator – Alarm
4 Fill in opening, screwed plug
5
Feed pressure indication: Manometer
6
Interface RS232: remote control via personal computer
RS232
7
Alarm output (for external alarm signal)
8 Filling level indication
9 Drain tap with drain port
10a
10b
Castor with brake (at the front)
Castor without brake (at the back)
11 Venting grid, removable
13 Feed pressure adjusting valve
14
Pump connector OUT – pressure pump
Pump connector IN– Return
15
FL/FLW20006 G 1¼“
Overflow connector
16
1 Motor protection switch for compressor motor
2 + 3 Mains circuit breakers (resettable) F1, F2 - 4 A (for Electronics)
4 + 5 Mains circuit breakers (resettable) F3, F4 - 10 A (for Pump motor)
17 Mains power cable with plug
18
19
Only water cooled models
IN Cooling water inlet
OUT Cooling water outlet
G3/4" external thread
3/4" inner dia. Tubing, compression-proof
Cooling water drain for residual water in case of service
16
6. Operating procedures
6.1. 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.
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: www.JULABO.de
6.2. Power connection
Caution:
Only connect the unit to a power socket with earthing contact (PE – protective earth)!
The power supply plug serves as safe disconnecting device from the line and must
be always easily accessible.
Never operate equipment with damaged mains power cables.
Regularly check the mains power cables for material defects (e.g. for cracks).
We disclaim all liability for damage caused by incorrect line voltages!
Make sure that the line voltage and frequency match the supply voltage specified on the
type plate.
17
N
6.3. Filling
Top view
Take care that no liquid enters the interior of the circulating
cooler.
Connect the tubing from the external system to the pump
connectors and check for leaks
Respect instructions from page 12 to page 14!
Check to make sure that the drain taps (9a, 9b) are
closed.
Unscrew the plug from the filling port (4).
Fill in bath fluid up to marking „H“ of the filling level
H
Turn the mains switch (1) on (Switching on - see below)
Switch on unit. To do so press button
Bath fluid is pumped into the externally connected system.
Refill fluid up to marking „H“.
L
The recirculating cooler is ready for operation.
Close the the fill in opening (4) with the screw plug!
indicator.
for approx. 4 seconds.
6.4. Switching on / Start - Stop
O
60
1545
4 s
30
18
Switching on:
The recirculating cooler is turned on and off with the mains switch.
The unit performs a self-test. All segments of the 4-digit LED
temperature DISPLAY and all indicator lights will illuminate.
Then the software version and the type of unit are indicated.
The display "OFF" indicates the unit is ready to operate (standby
mode).
Start: Press enter
The LED temperature DISPLAY indicates the actual bath
temperature.
Stop: 1. Press enter
2. Wait until the LED display stops blinking!
3. Turn the unit off with the mains power switch.
for about 4 seconds.
for about 4 seconds.
6.5. Setting the feed pressure
Set the max. permissible feed pressure (example: 2 bar) by slowly
closing the adjusting valve (13) on the rear and looking at the
max.
manometer (5).
The max. pressure is determined by the weakest element in the
circuit (e. g. glass equipment).
6.6. Setting the temperatures
Factory setting: 25 °C
Setting can be carried out in the start/stop condition.
1. Press one of the keys for a short moment.
The setpoint value instead of the actual value is indicated on the
display for about 8 seconds.
The value can now be changed.
2. Change value:
Press
Press
Keep the keys depressed for the value to change fast.
to set a higher value.
to set a lower value.
3. Press enter to store the value.
6.7. AUTOSTART ON / OFF
The recirculating cooler has been configured and supplied by JULABO
according to N.A.M.U.R. recommendations. This means for the start
mode, that the unit must enter a safe operating state after a power
failure (non-automatic start mode). This safe operating state is indicated
by „OFF“ on the LED temperature display. A complete shutdown of the
main functional elements such as compressor and circulating pump is
effected simultaneously.
If such a safety standard is not required, the AUTOSTART function
(automatic start mode) may be activated, thus allowing the start of the
circulator directly by pressing the mains power switch
Keep depressed enter
turn on the unit with the mains power switch.
For a short while the LED DISPLAY indicates the effective start mode:
and
AUTOSTART on. AUTOSTART off.
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.
19
6.8. Remote control: activate – deactivate
The recirculating cooler is to be prepared for remote control by a
personal computer via the serial interface RS232.
Set the interface item from >IOFF< to >ION<.
Remote control: activate – deactivate:
(Interface OFF)
(Interface On)
Switch off recirculating cooler by pressing the mains switch and
wait approx. 5 seconds.
Keep depressed the keys
turn on the unit with the mains power switch.
>I OFF< No remote control via RS232 (Factory setting)
>I On< Remote control via RS232
and enter simultaneously and
The software version and the type of unit is indicated
(see example on the left).
The display "rOFF" indicates the unit is ready to be operated via
remote control.
20
7. Safety installations
7.1. Excess temperature protection
This safety installation is independent of the control circuit.
+
7.2. Low level protection
When the temperature of the bath fluid has reached the safety temperature (85
°C), a complete shutdown of the compressor and pump is effected.
The alarm is indicated by optical and audible signals (continuous tone) and on
the LED-DISPLAY appears the error message "Error 14".
+
Caution:
For refill always use the same bath fluid type that is already in the bath.
This safety installation is independent of the control circuit.
If the low liquid level protection device is triggered, a complete shutdown of the
compressor and circulating pump is effected.
The alarm is indicated by optical and audible signals (continuous tone) and on
the LED-DISPLAY appears the error message
"Error 01".
Turn off the unit with the mains switch, refill bath fluid and turn the unit on
again!
Notice:
Check the low liquid level protection device at least twice a year!
To execute a functional test, drain the liquid until the alarm for low liquid level is
triggered. Refill liquid afterwards.
8. Troubleshooting guide / Error messages
Whenever the microprocessor electronics registers a failure, a complete
shutdown of the compressor and circulating pump is performed. The alarm light
+
" illuminates and a continuous signal tone sounds.
"
The LED temperature display indicates the cause for the alarm in form of a
code.
Press enter
The recirculating cooler is operated without bath fluid, or the liquid level is
insufficient.
Replenish the bath tank with the bath fluid.
Tube breakage has occured (insufficient filling level due to excessive bath
fluid pumped out). Replace the tubing and replenish the bath tank with the
bath fluid.
Cable of the working temperature sensor interrupted or short-circuited.
Error in A/D converter
to quit the audible signal.
21
The return temperature is above the switch-off value of the high temperature
protection (85°C). Check dimensioning of application.
Use a stronger recirculating cooler if necessary.
The motor protection switch for the compressor motor is off. Set motor
protection switch to >1< . Check the fuses.
The pressure sensor of low pressure side (evaporation pressure) is faulty,
short-circuited or has a line interruption.
Have the repair done by a specialist.
The motor protection switch for the compressor motor is off. Set motor
protection switch to >1< . Check the fuses.
The pressure sensor of high pressure side is faulty, short-circuited or has a
line interruption.
Have the repair done by a specialist.
The suction gas temperature sensor is faulty, short-circuited or has a line
interruption.
Have the repair done by a specialist.
After eliminating the malfunction, press the mains power switch off and on
again to cancel the alarm state.
If the unit cannot be returned to operation, contact an authorized service
station.
Warning without a complete shutdown of the unit
Excess temperature warning starting at 75 °C
The return temperature soon reaches the swith-off value of the high
temperature protection (85 °C).
Cooling of the condenser is affected. (see page 27)
Clean air-cooled condenser.
Check the flow rate and cooling water temperature on water-cooled
condenser.
If the unit cannot be returned to operation, contact an authorized JULABO
service station.
Disturbances that are not indicated.
Overload protection:: a) for cooling machine
b) for pump motor
After a short cooling interval, the unit will automatically start running.
1 Motor protection switch for compressor motor
2 + 3 Mains circuit breakers (resettable) F1, F2 - 4 A (for Electronics)
4 + 5 Mains circuit breakers (resettable) F3, F4 - 10 A (for Pump motor)
22
9
5
9. Electrical connections
Notice: Use shielded cables only.
The shield of the connecting cable is electrically connected to the plug housing.
The unit ensures safe operation if connecting cables with a maximum length of 3 m are
used. The use of longer cables does not affect proper performance of the unit, however
external interferences may have a negative impact on safe operation.
1
6
RS232C
Accessories:
RS232 serial interface
This port can be used to connect a computer with an RS232 cable for remote
control of the recirculating cooler.
Pin assignments RS232:
Pin 2 RxD Receive Data
Pin 3 TxD Transmit Data
Pin 5 0 V Signal GND
Pin 7 RTS Request to send
Pin 8 CTS Clear to send
Pin 1; 4; 6, 9 Reserved - do not use!
Order No. Description
8 980 073 RS232 interface cable 9-pol./9-pol. , 2,5 m
8 900 110 USB interface adapter cable
Alarm output
Potential-free change-over contact for external alarm signal.
Pin 2 and 3 are connected in case of an alarm.
Pin 2 and 1 are connected in normal condition or mains switch "Off".
Switching capacity max. 30 W / 30 VA
Switching voltage max. 30 V/
Switching current max. 1 A
or
23
9
6
5
10. Remote control
10.1. Setup for remote control
1
RS232
Check the interface parameters for both interfaces (on recirculating cooler and
PC) and make sure they match.
Interface parameters are pre-determined.
Type RS232
Baudrate 4800 bauds
Parity even
Handshake hardware handshake
10.2. Communication with a PC or a superordinated data system
If the recirculating cooler is put into remote control mode the MULTI-DISPLAY
(LED) will read „R -OFF-„ = REMOTE STOP. The recirculating cooler is now
operated via the computer.
In general, the computer (master) sends commands to the recirculating cooler
(slave). The recirculating cooler sends data (including error messages) only
when the computer sends a query.
In remote control mode:
After a power interruption the order to start and all values which have to be
adjusted must be resent from the personal computer via the interface.
AUTOSTART is not possible.
A transfer sequence consists of:
command out/in command
space (; Hex: 20) out/in command
parameter (the character separating decimals in a group is the
period) out command
end of file (; Hex: 0D) out/in command
The response (data string) after an in command is always followed by a
line feed (LF, Hex: 0A).
Important times for a command transmission:
To ensure a safe data transfer, the time gap between two commands should
be at least 250 ms.
The recirculating cooler automatically responds to an in command with a data
string followed by a LF (Line Feed). The next command should only be sent
after 10 ms.
The commands are divided into in or out commands.
in commands: asking for parameters to be displayed
out commands: setting parameters
24
The out commands are valid only in remote control mode.
Examples:
Command to set the working temperature to15,5 °C: out_sp_00 15.5
Command to ask for the working temperature in_sp_00
Response from the recirculating cooler: 15.5 LF
10.3. List of commands
out commands: Setting parameters or temperature values.
Command Parameter Response of recirculating cooler
out_mode_05 0 Stop the unit = R –OFF-.
out_mode_05 1
out_sp_00 xxx.xx
Start the unit.
Set working temperature
in commands: Asking for parameters or temperature values to be displayed.
Command Parameter Response of recirculating cooler
version none Number of software version (V X.xx)
status none
in_pv_00 none Actual bath temperature.
in_sp_00 none Working temperature
in_mode_05 none
Status message, error message (see page 25 )
Recirculating cooler in Stop/Start condition:
0 = Stop
1 = Start
10.4. Status messages
Status messages Description
00 MANUAL STOP
01 MANUAL START
02 REMOTE STOP
03 REMOTE START
Recirculating cooler in „OFF“ state.
Recirculating cooler in keypad control mode.
Recirculating cooler in „r OFF“ state.
Recirculating cooler in remote control mode.
25
10.5. Error messages
Error messages
-01 LOW LEVEL ALARM
-05 WORKING SENSOR ALARM
-03 EXCESS TEMPERATURE WARNING
-07 I2C-BUS ERROR
-08 INVALID COMMAND
-09 COMMAND NOT ALLOWED IN
CURRENT OPERATING MODE
-10 VALUE TOO SMALL
-11 VALUE TOO LARGE
-12 TEMPERATURE MEASUREMENT
ALARM
-14 EXCESS TEMPERATURE
PROTECTOR ALARM
-20 WARNING: CLEAN CONDENSOR OR
CHECK COOLING WATER CIRCUIT
OF REFRIGERATOR
-51 PRESSURE SENSOR ALARM LOW
PRESSURE SIDE
-52 PRESSURE SENSOR ALARM HIGH
PRESSURE SIDE
-53 SUCTION GAS TEMPERATURE
SENSOR ALARM
Description
Low liquid level alarm.
Working temperature sensor short-circuited or
interrupted.
High temperature warning. Starting at 75 °C
(no deactivation)
The return temperature soon reaches the switch-off
value of the high temperature warning function (85 °C)
Internal error when reading or writing the I
2
C bus.
Invalid command.
Invalid command in current operating mode.
Entered value too small.
Entered value too large.
Error in A/D converter.
The return temperature is above the switch-off value of
the high temperature warning function of 85 °C.
Check dimensioning of application.
Use a stronger recirculating cooler if necessary.
Cooling of the condenser is affected. Clean air-cooled
condenser.
Check the flow rate and cooling water temperature on
water-cooled condenser.
The motor protection switch for the compressor
motor is off. Set motor protection switch to >1< .
Check the fuses.
The pressure sensor of low pressure side
(evaporation pressure) is faulty, short-circuited or
has a line interruption.
Have the repair done by a specialist.
The motor protection switch for the compressor
motor is off. Set motor protection switch to >1< .
Check the fuses.
The pressure sensor of high pressure side is
faulty, short-circuited or has a line interruption.
Have the repair done by a specialist.
The suction gas temperature sensor is faulty, shortcircuited or has a line interruption.
Have the repair done by a specialist.
26
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.
Electrical connections and any other work must be performed by qualified personnel
only.
Notice:
Risk of hand injuries when mounting the venting grid.
Maintaining the cooling performance
Air cooled models = FL
To maintain the full cooling performance, clean the condenser
from time to time.
Switch off the unit, disconnect mains power cable.
Hold the venting grid, pull out and remove.
Clean the ribbed condenser with a vacuum cleaner.
Replace the venting grid.
Switch on the unit.
The following service procedures are to be carried out only by
qualified service personnel.
In order to maintain a good condition of the cooling compressor,
the dirt pan in the cooling water inlet should be cleaned in
regular intervals.
Switch the unit off, disconnect the power plug.
Interrupt the cooling water inlet.
Loosen the screws at the back and remove right side panel.
Dirt collects behind the lock screw of the dirt trap. Remove
lock screw.
Remove the dirt by opening the water input for a short
moment (rinse).
Return and fasten lock screw to dirt trap.
Open cooling water inlet and check screw coupling for leak
tightness.
Replace right side panel.
The unit is ready to operate again.
27
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
FLW20006: drain residual water of cooling water circuit.
(19 – Cooling water drain for residual water)
Attach a short fault description.
When returning a unit, take care of careful and adequate packing.
During transport the unit has to stand upright. Mark the packing
correspondingly.
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.
28
11.1. JULABO Service – Online remote diagnosis
JULABO circulators of the HighTech series are equipped with a
black box. This box is implemented in the controller and records
all significant data for the last 30 minutes.
In case of a failure, this data can be read out from the unit by
using special software. This software is available as a free
download from www.julabo.com
Installation is easy and is performed step by step.
Please observe the instructions.
Data read-out is possible in the conditions
“OFF”, “R OFF” or “ALARM”.
Connect the circulator to the computer using an interface
cable.
Start the EasyBlackBox program.
The program asks for the port used (COM1, ......) and the baud
rate of the unit.
You do not have this information on hand? Simply try it out!
The program continues to send the request until the correct
settings are made.
Data is read out and shown on the monitor
divided in the sections
>Einstellungen/Settings<,
>Alarmspeicher/Alarms stored<,
>Blackbox<
see example
After pressing >Speichern/Save< a text file is
compiled. The program proposes a filename >C:\model description and barcode no.<.
Modifications are possible.
E-mail this file to ServiceUSA@Julabo.com,
JULABO's service department. JULABO is thus
able to provide rapid support.
\ EasyBlackBox.
29
11.2. Draining
Notice:
Store and dispose the used bath fluid according to the laws for environmental
protection.
Risk of injury for hands when mounting the venting grid.
The unit has two drain taps. Both have to be used.
First drain the large tank via drain tap A, the drain the
remaining liquid via drain tap B.
Turn off the unit and disconnect the mains cable from
the power source.
Hold the venting grid, pull out and remove.
Place a suitable vessel for accepting the used bath
liquid underneath the drain.
Assemble the barbed fitting to the drain tap.
Slide a short piece of tube onto the barbed fitting and
hold it into a pail.
Open the drain tap and empty the unit completely.
Tighten the drain tap after draining the unit and
replace the venting grid.
30
12. Warranty conditions
JULABO 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
GmbH’s original invoice.
JULABO 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.
, indicating the serial no. The extended warranty will apply from the date of JULABO
31
13. Example Installation Log
Type of Unit: FL Year of manufacture:
Refrigerant: Permissible operating
overpressure
Filling volume refrigerant:
1 Details of all maintenance and repairs
2 Quantity and type (new, reused or recyceled) of the refrigerant used for filling
Quantity of refrigerant drained from the unit
3 If an analysis of the reused refrigerant is available, please list the results
4 Origin of the refrigerant
5 Modification and exchange of unit components
6 Results of every regular routine test
7 Extended down times
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