Julabo FP52-SL User manual

19532830-V5.docx 27.06.18
Operating Manual
English
Ultra-Low
Refrigerated Circulators
air-cooled
FP52-SL
FP55-SL
FP90-SL
water-cooled
FPW52-SL
FPW55-SL
FPW90-SL
FPW91-SL
•upgradable with supplementary pump - HSP
•upgradable with supplementary heater - HST
•special unit with bath opening for internal
temperature applications
JULABO USA, Inc.
884 Marcon Boulevard
Allentown, PA 18109
Phone: [phone]
Fax: [phone]
[email protected]
www.julabo.com

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 and
ISO 14001. Certificate Registration No. 01 100044846
Unpacking and inspecting
Unpack the circulator and accessories and inspect them for possible transport damage. Damage should
be reported to the responsible carrier, railway, or postal authority, and a damage report should be
requested. These instructions must be followed fully for us to guarantee our full support of your claim
for protecting against loss from concealed damage. The form required for filing such a claim will be
provided by the carrier.
Printed in Germany Changes without prior notification reserved
Important: keep operation manual for future use
1.953.2830-V3 02/16

SL
3
TABLE OF CONTENTS
Operating manual................................................................................................................ 5
1. Intended use................................................................................................................. 5
1.1. Description ............................................................................................................... 5
2. Operator responsibility – Safety recommendations....................................................... 6
2.1. Disposal ................................................................................................................... 8
2.2. Technical specifications ........................................................................................... 9
2.3. Mains power connections....................................................................................... 15
2.4. Cooling water connection ....................................................................................... 17
Operating instructions ....................................................................................................... 18
3. Safety notes for the user............................................................................................. 18
3.1. Explanation of safety notes .................................................................................... 18
3.2. Explanation of other notes...................................................................................... 18
3.3. Safety recommendations........................................................................................ 19
4. Operating controls and functional elements ................................................................ 21
5. Preparations ............................................................................................................... 25
5.1. Installation.............................................................................................................. 25
5.2. Bath fluids .............................................................................................................. 26
5.3. Temperature application to external systems ......................................................... 27
5.3.1.Tubing ............................................................................................................... 29
5.4. Filling / draining...................................................................................................... 30
6. Operating procedures ................................................................................................. 31
6.1. Power connection................................................................................................... 31
6.2. Switching on / Selecting the language.................................................................... 31
6.2.1.Switching on the circulator ................................................................................. 31
6.2.2.Switching on the cooling machine...................................................................... 32
6.3. Start - Stop............................................................................................................. 32
7. Setting of temperatures ................................................................................. 33
8. Safety installations, warning functions........................................................... 33
8.0.1.Early warning system, low level protection......................................................... 37
9. Menu functions.............................................................................................. 38
9.1. Start of a program .................................................................................................. 40
9.1.1.Status at the end of a program .......................................................................... 42
9.1.2.Indication after successful start.......................................................................... 42
9.1.3.Editing after Start............................................................................................... 42
9.1.4.Interrupting a program ....................................................................................... 43
9.1.5.Interruption after a power failure ........................................................................ 44
9.1.6.Termination of a program................................................................................... 44
9.2. Program administration, creation............................................................................ 45
9.3. Setting the pump pressure ..................................................................................... 49
9.4. Configuration.......................................................................................................... 50
9.4.1.Remote control via the serial interface ............................................................... 53
9.4.2.Keypad control or setpoint setting via the analog input ...................................... 53
9.4.3.Autostart ............................................................................................................ 54
9.4.4.Off-Mode ........................................................................................................... 54
9.4.5.ActVar - actuating variable................................................................................. 55
9.4.6.Setting of clock and date ................................................................................... 56

4
9.4.7.Language ...........................................................................................................56
9.4.8.Unit.....................................................................................................................56
9.4.9.Program type......................................................................................................56
9.4.10. Reset.............................................................................................................56
9.5. Control ....................................................................................................................57
9.5.1. Control internal / external...................................................................................59
9.5.2.Selftuning ...........................................................................................................60
9.5.3.Dynamik intern ...................................................................................................60
9.5.4.CoSpeed - extern ...............................................................................................61
9.5.5.Control parameters – internal/external................................................................61
9.6. Serial Interface........................................................................................................63
9.7. ATC Absolute Temperature Calibration, 3-point calibration.....................................64
9.7.1.ATC Fühler - intern / extern ................................................................................67
9.7.2.ATC Status - yes / no .........................................................................................67
9.7.3.Type 1 -/ 2 -/ 3 point ..........................................................................................67
9.7.4.Example: 3-point calibration for internal control .................................................67
9.8. Limits ......................................................................................................................70
9.8.1.Limits for internal control and external control.....................................................71
9.8.2.Limits for external control....................................................................................72
9.9. Analog inputs/outputs .............................................................................................73
9.9.1.Control connector ...............................................................................................77
9.9.2.Outputs of the connector - REG+E-PROG..........................................................77
9.9.3.Input of the connector - REG+E-PROG ..............................................................78
9.9.4.External Stand-by input ......................................................................................80
9.9.5.Alarm-output.......................................................................................................81
10. Troubleshooting guide / Error messages .....................................................................82
11. Electrical connections..................................................................................................85
12. Remote control ............................................................................................................88
12.1.Setup for remote control..........................................................................................88
12.2. Communication with a PC or a superordinated data system ...................................88
12.3. List of commands....................................................................................................89
12.4. Status messages ....................................................................................................92
12.5. Error messages.......................................................................................................92
13. JULABO Service – Online remote diagnosis ...............................................................94
14. Installation of electronic module with analog connectors .............................................95
15. Cleaning / repairing the unit.........................................................................................95
Anhang: HST Zusatzheizer und HSP Zusatzpumpe..........................................................97
16. HST booster heater .....................................................................................................98
16.1. Excess temperature protection on the HST booster heater .....................................99
16.2. Technical specifications - HST booster heater: .......................................................99
17. HSP booster pump ....................................................................................................100
17.1. Pump connection with HSP booster pump ............................................................101
17.2. Technical specifications - HSP booster pump .......................................................101
18. WARRANTY PROVISIONS.......................................................................................102

SL
5
Operating manual
1. Intended use
JULABO circulators have been designed to control the temperature of specific fluids in a bath tank.
The units feature pump connections for temperature control of external systems (loop circuit).
JULABO circulators are not suitable for direct temperature control of foods, semi-
luxury foods and tobacco, or pharmaceutical and medical products.
Direct temperature control means unprotected contact of the object with the bath
medium (bath fluid).
1.1. Description
Pt100
The circulators are operated via the splash-proof keypad. The implemented
microprocessor technology allows to set and to store different values that can be
indicated on the VFD COMFORT-DISPLAY and LCD DIALOG-DISPLAY. Three
menu keys facilitate adjusting setpoints, warning and safety functions and menu
functions.
The integrated programmer allows storing and running temperature and time-
dependent processes.
The control electronics including “ICC - Intelligent Cascade Control“ automatically
adapts the heat supplied to the thermal requirements of the bath.
The TCF -Temperature Control Features allow the user to have access to all
important temperature control parameters. This means: Full control on the control
mode and the chance to manually adjust or adapt control to the specific application.
Absolute Temperature Calibration (ATC3) provides high temperature stability in the
bath. With the 3-point calibration an offset is adjusted at three temperatures to
ensure an accurate temperature pattern at the selected spot in the bath over the full
temperature range.
Electrical connections:
The serial interface, switchable from RS232 to RS485, allows modern process
technology without additional interface.
Connection for Pt100 external sensor for external temperature measurement and
control.
Alarm output for external alarm message or control of JULABO refrigerating baths
or solenoid valve (cooling water).
The electronic module (option) provides 3 further analog connections (alarm input,
standby input, recorder output, programmer input).
The excess temperature protection conforming to IEC 61010-2-010 is a safety
installation independent from the control circuit. This protection can be indicated
and set on the LCD DIALOG-DISPLAY.
The early warning system for low level signals that bath fluid needs to be refilled
before the low level protection conforming to IEC 61010-2-010 causes a complete
shut-down of the main functional elements.
Intelligent pump system: The pump capacity (electronically adjustable via the motor
speed) enables to adapt to varying conditions for internal and external temperature
applications.
ICC
TCF
ATC
3
RS232
RS485
PUMP
SMART

Operator responsibility – Safety recommendations
6
2. Operator responsibility – Safety recommendations
The products of JULABO ensure safe operation when installed, operated, and maintained according to
common safety regulations. This section explains the potential dangers that may arise when operating
the circulator and also specifies the most important safety precautions to preclude these dangers as far
as possible.
The operator is responsible for the qualification of the personnel operating the units.
The personnel operating the units should be regularly instructed about the dangers involved with
their job activities as well as measures to avert these dangers.
Make sure all persons tasked with operating, installing, and maintaining the unit have read and
understand the safety information and operating instructions.
When using hazardous materials or materials that could become hazardous, the circulator may be
operated only by persons who are absolutely familiar with these materials and the circulator. These
persons must be fully aware of possible risks.
If you have any questions concerning the operation of your unit or the information in this manual, please
contact us!
Contact JULABO USA, Inc.
884 Marcon Boulevard
Allentown, PA 18109
Phone: [phone]
Fax: [phone]
[email protected]
www.julabo.com
Safety instructions for the operator:
You have received a product designed for industrial use. Nevertheless, avoid strikes to the
housing, vibrations, damage to the operating-element panel (keypad, display), and contamination.
Make sure the product is checked for proper condition regularly (depending on the conditions of
use). Regularly check (at least every 2 years) the proper condition of the mandatory, warning,
prohibition and safety labels.
Make sure that the mains power supply has low impedance to avoid any negative effects on
instruments being operated on the same mains.
This unit is designed for operation in a controlled electromagnetic environment. This means that
transmitting devices (e.g., cellular phones) should not be used in the immediate vicinity.
Magnetic radiation may affect other devices with components sensitive to magnetic fields
(e.g., monitors). We recommend maintaining a minimum distance of 1 m.
Permissible ambient temperature: max. 40 °C, min. 5 °C.
Permissible relative humidity: 50% (40 °C).
Do not store the unit in an aggressive atmosphere.
Protect the unit from contamination.
Do not expose the unit to sunlight.
Appropriate operation
Only qualified personnel is authorized to perform configuration, installation, maintenance and repairs of
the circulator.
Routine operation can also be carried out by untrained personnel who should however be instructed by
trained personnel.

SL
7
Use:
The bath can be filled with flammable materials. Fire hazard!
There might be chemical dangers depending on the bath medium used.
Observe all warnings for the used materials (bath fluids) and the respective instructions (safety data
sheets).
Insufficient ventilation may result in the formation of explosive mixtures. Only use the unit in well
ventilated areas.
Only use recommended materials (bath fluids). Only use non-acid and non corroding materials.
When using hazardous materials or materials that could become hazardous, the operator must affix
the enclosed safety labels to the front of the unit so they are highly visible:
If this unit is intended for use within the United States of America, all 3 warning labels must be affixed
to the housing of the unit prior to use.
Directions for the positioning of the individual warning labels are enclosed with the warning labels
included in the delivery.Warning labels must be easily visible to users.
1
Warning label W00: Colors: yellow, black
Danger area. Attention! Observe instructions.
(operating manual, safety data sheet)
2
or
Mandatory label M018: Colors: blue, white
Carefully read the user information prior to beginning operation.
Scope: EU
2
Semi S1-0701 Table A1-2 #9
Carefully read the user information prior to beginning operation.
Scope: USA, NAFTA
3
Warning label Proposition 65
Particular care and attention is necessary because of the wide operating range.
There are thermal dangers: Burn, scald, hot steam, hot parts and surfaces that can be touched.
Warning label W26: Colors: yellow, black
Hot surface warning.
(The label is put on by JULABO)
Observe the instructions in the manuals for instruments of a different make that you connect to the
circulator, particularly the respective safety recommendations. Also observe the pin assignment of
plugs and technical specifications of the products.

Operator responsibility – Safety recommendations
8
2.1. Disposal
The circulator contains a back-up battery that supplies voltage to memory chips when the unit is
switched off. Do not dispose of the battery with household waste!
Depending on battery regulations in your country, you might be obliged to give back used or defect
batteries to gathering places.
The product may be used with oil as bath fluid. These oils fully or partially consist of mineral oil or
synthetic oil. For disposal, observe the instructions in the safety data sheets.
This unit contains refrigerants, 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.
Contact an authorized waste management company in your country.
Disposal with household waste (unsorted waste) or similar collections of municipal
waste is not permitted!

SL
9
2.2. Technical specifications
Ultra-Low Refrigerated Circulator FP52-SL
air-cooled
FPW52-SL
water-cooled
Working temperature range °C -60 ... 100
Special unit with extended
working temperature range
°C -60 ... 150
Temperature stability °C ±0.05
Cooling capacity
Medium ethanol
°C
kW
[phone]
3.0 2.8 1.6 0.65 0.1
Cooling compressor 1-stage
Refrigerant R404A
Cooling water flow rate at 20 °C l/h approx. 300
Overall dimensions (WxDxH) cm 59x76x116
Filling port dia. cm 7
Special unit with bath opening
(WxL)
cm 28x23
Bath depth cm 22
Filling volume liters 24
Weight kg 156 153
Ambient temperature °C 5 ... 40
Cooling water connection ------ G3/4“ male thread
Mains power connection V/ Hz 400 V/3PNPE/ 50 Hz 400 V/3PNPE/ 50 Hz
Current draw (at 400 V) A 21 20
Mains power connection V/ Hz 208 V/3PPE/ 60 Hz 208 V/3PPE/ 60 Hz
Current draw (at 208 V) A 25 24
Mains power connection V/ Hz 230 V/3PPE/ 50 Hz
Current draw (at 230 V) A 25 --
Current draw: Refer to notice page 15
All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

Operator responsibility – Safety recommendations
10
Ultra-Low Refrigerated Circulator FP55-SL
air-cooled
FPW55-SL
water-cooled
Working temperature range °C -60 ... 100
Special unit with extended
working temperature range
°C -60 ... 150
Temperature stability °C ±0.05
Cooling capacity
Medium ethanol
°C
kW
[phone]
5.2 4.1 2.2 0.7 0.13
Cooling compressor 1-stage
Refrigerant R404A
Cooling water flow rate at 20 °C l/h approx. 400
Overall dimensions (WxDxH) cm 85x76x116 59x76x116
Filling port dia. cm 7
Special unit with bath opening
(WxL)
cm 28x23
Bath depth cm 23
Filling volume liters 27
Weight kg 180 146
Ambient temperature °C 5 ... 40
Cooling water connection ------ G3/4“ male thread
Mains power connection V/ Hz 400 V/3PNPE/ 50 Hz 400 V/3PNPE/ 50 Hz
Current draw (at 400 V) A 20 20
Mains power connection V/ Hz 208 -230V/3PPE/ 60 Hz 208-230 V/3PPE/ 60 Hz
Current draw (at 208 V / 230 V) A 28 28
Current draw: Refer to notice page 15
All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

SL
11
Ultra-Low Refrigerated Circulator FP90-SL
air-cooled
FPW90-SL
water-cooled
Working temperature range °C -90 ... 100
Special unit with extended
working temperature range
°C -90 ... 150
Temperature stability °C ±0.05
Cooling capacity
Medium ethanol
°C
kW
[phone]
1.8 1.7 1.6 1.35 0.75 0.15
Cooling compressor 2-stage
Refrigerant R404A / R23
Cooling water flow rate at 20 °C l/h ----- approx. 250
Overall dimensions (WxDxH) cm 59x76x116
Filling port dia. cm 7
Special unit with bath opening
(WxL)
cm 28x23
Bath depth cm 20
Filling volume liters 22
Weight kg 195 195
Ambient temperature °C 5 ... 40
Cooling water connection ------ G3/4“ male thread
Mains power connection V/ Hz 400 V/3PNPE/ 50 Hz 400 V/3PNPE/ 50 Hz
Current draw (at 400 V) A 22 19
Mains power connection V/ Hz 208-230 V/3PPE/ 60 Hz 208-230 V/3PPE/ 60 Hz
Current draw (at 208 V / 230 V) A 29 26
Mains power connection V/ Hz 230 V/3PPE/ 50 Hz 230 V/3PPE/ 50 Hz
Current draw (at 230 V) A 29 26
Current draw: Refer to notice page 15
All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

Operator responsibility – Safety recommendations
12
Ultra-Low Refrigerated Circulator FPW91-SL
water-cooled
Working temperature range °C -91 ... 100
Temperature stability °C ±0.2
Cooling capacity
Medium ethanol
°C
kW
[phone]
4.5 4.1 3.7 3.1 2.0 0.75
Cooling compressor 2-stage
Refrigerant R404A / R23
Cooling water flow rate at 20 °C l/h approx. 450
Overall dimensions (WxDxH) cm 85x76x116
Filling port dia. cm 7
Special unit with bath opening
(WxL)
cm 28x23
Bath depth cm 20
Filling volume liters 22
Weight kg 216
Ambient temperature °C 5 ... 40
Cooling water connection G3/4“ male thread
Mains power connection V/ Hz 400 V/3PNPE/ 50 Hz
Current draw (at 400 V) A 32
Mains power connection V/ Hz 230 V/3PPE/ 60 Hz
Current draw (at 230 V) A 32
Current draw: Refer to notice page 15
All measurements have been carried out at: rated voltage and frequency ambient temperature: 20 °C
Technical changes without prior notification reserved.

SL
13
SL
Temperature selection digital
via keypad indication on LCD DIALOG-DISPLAY (°C/°F)
remote control via PC indication on monitor
Temperature indication VFD COMFORT-DISPLAY (°C/°F)
Resolution °C 0.01
ATC3 INT / EXT °C ±3 / ±9
Temperature control ICC - Intelligent Cascade Control
Heater wattage (at 230 V) 3.0
Electronically adj. pump capacity stages 1 ... 4
Flow rate at 0 bar l/min 22 ... 26
Max. pressure at 0 liters bar 0.7
Max. suction at 0 liters bar 0.4
Pump connections, male mm M16x1
Electrical connections: See page 14
Ambient temperature °C 5 ... 40
Mains power connection V/ Hz 208 V - 230 V/ 50/60 Hz
Current draw (at 208 V / 230 V) A 13 / 14
All measurements have been carried out at: rated voltage and frequency
ambient temperature: 20 °C Technical changes without prior notification reserved.

Operator responsibility – Safety recommendations
14
Electrical connections:
External alarm device 24-0 V DC / max. 25 mA
Computer interface RS232 or RS485
External Pt100 sensor
Optional for HL, SL
(Order No. 8900100 Electronic module with analog connections)
Programmer input -100 °C to 400 °C = 0 - 10 V or 0 - 20 mA or 4 - 20 mA
Input for the signal of a flow meter or external manipulated variable
Temperature recorder outputs 0 - 10 V (0 V = -100 °C, 10 V = 400 °C)
0 - 20 mA (0 mA = -100 °C, 20 mA = 400 °C)
4 - 20 mA (4 mA = -100 °C, 20 mA = 400 °C)
Standby input for external emergency switch-off
Alarm output for external alarm signal
Safety installations according to IEC 61010-2-010:
Excess temperature protection adjustable from 0 °C ... 320 °C
Low liquid level protection float switch
Classification according to DIN 12876-1 class III
Supplementary safety installations
Early warning system for low level float switch
High temperature warning function optical + audible (in intervals)
Low temperature warning function optical + audible (in intervals)
Supervision of working sensor plausibility control
Reciprocal sensor monitoring between
working and safety sensors difference >35 K
Alarm message optical + audible (permanent)
Warning message optical + audible (in intervals)
Environmental conditions according to IEC 61 010-1:
Use indoors only.
Altitude up to 2000 m - normal zero.
Ambient temperature: see Technical specifications
Humidity:
Max. relative humidity 80% for temperatures up to +31 °C,
linear decrease down to 50% relative humidity at a temperature of +40 °C
Max. mains voltage fluctuations of ±10% are permissible.
Protection class according to IEC 60 529 IP21
The unit corresponds to Class I
Overvoltage category II
Pollution degree 2
Caution:
The unit is not suitable for use in explosive environment

SL
15
EMC requirements
The device is an ISM device of group 1 per CISPR 11 (uses HF for internal purposes) and is
classified in class A (industrial and commercial sector).
Notice:
•Devices of class A are intended for the use in an industrial electromagnetic environment.
•When operating in other electromagnetic environments, their electromagnetic compatibility
may be impacted.
•This device is not intended for the use in living areas and cannot guarantee adequate
protection of the radio reception in such environments.
2.3. Mains power connections

Note concerning current consumption: Mains power connection 3PNPE and 3PPE
The indicated value of current consumption is the maximum useful current of the phase,
which also feeds the SL circulator with a 3 kW heater. If the ultra-low refrigerated circulator
is operated with the HST additional heater, the 6 kW heating capacity is divided in equal
shares (2x3 kW) on the two other phases..
Model Mains power connection 3PNPE
FP52-SL 400 V/3PNPE/50 Hz
FPW52-SL 400 V/3PNPE/50 Hz
FP55-SL 400 V/3PNPE/50 Hz
FPW55-SL 400 V/3PNPE/50 Hz
FP90-SL 400 V/3PNPE/50 Hz
FPW90-SL 400 V/3PNPE/50 Hz
FPW91-SL 400 V/3PNPE/50 Hz

Operator responsibility – Safety recommendations
16
Model Mains power connection 3PPE
FP52-SL 230 V/3PPE/50 Hz
FP52-SL 208 V/3PPE/60 Hz
FPW52-SL 208 V/3PPE/60 Hz
FP55-SL 208 V/3PPE/60 Hz
FPW55-SL 208 V/3PPE/60 Hz
FP90-SL 230 V/3PPE/50 Hz
FPW90-SL 230 V/3PPE/50 Hz
FP90-SL 230 V/3PPE/60 Hz
FPW90-SL 230 V/3PPE/60 Hz
Model Mains power connection 3PPE
FPW91-SL 230 V/3PPE/60 Hz
Attention:
Pay attention to the rotary field direction of the
compressor engines!
The rotating field direction is to the right.
Note concerning current consumption:
Each, the SL circulator, the additional
HST heater and the cooling unit FPW91
have their own supply mains.

SL
17
2.4. Cooling water connection
Cooling water pressure (IN/OUT) max. 6 bar
Pressure difference (IN - OUT) 3.5 to 6 bar
Cooling water temperature < 20 °C
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.
Notice:
Danger of corrosion of heat exchanger due to unsuitable quality of cooling
water.
•Due to its high content of lime, hard water is not suitable for cooling and causes
scale in the heat exchanger.
•Ferrous water or water containing ferrous particles will cause formation of rust
even in heat exchangers made of stainless steel.
•Chlorinated water will cause pitting corrosion in heat exchangers made of
stainless steel.
•Due to their corrosive characteristics, distilled water and deionized water are
unsuitable and will cause corrosion of the bath.
•Due to its corrosive characteristics, sea water is not suitable.
•Due to its microbiological (bacterial) 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.
Recommended quality of cooling water:
pH
7.5 to 9.0
Sulfate [SO4 2- ]
< 100 ppm
Hydrocarbonate [HCO 3-]/sulfate [SO4 2-]
> 1 ppm
Hardness [Ca 2+, Mg 2+]/[HCO 3-]
> 0.5 °dH
Alkalinity
60 ppm < [HCO 3-] < 300 ppm
Conductivity
< 500 μS/cm
Chloride (Cl -)
< 50 ppm
Phosphate (PO4 3-)
< 2 ppm
Ammonia (NH3)
< 0.5 ppm
Free chlorine
< 0.5 ppm
Trivalent iron ions (Fe 3+)
< 0.5 ppm
Manganese ions (Mn 2+)
< 0.05 ppm
Carbon dioxide (CO2)
< 10 ppm
Hydrogen sulfide (H2S)
< 50 ppm
Content of oxygen
< 0.1 ppm
Algae growth
impermissible
Suspended solids
impermissible

Operating instructions
18
Operating instructions
3. Safety notes for the user
3.1. Explanation of safety notes
In addition to the safety warnings listed, warnings are posted throughout the operating
manual. These warnings are designated by an exclamation mark inside an equilateral
triangle. “Warning of a dangerous situation (Attention! Please follow the
documentation).”
The danger is classified using a signal word.
Read and follow these important instructions for averting dangers.
Warning:
Describes a possibly highly dangerous situation. If these instructions are not
followed, serious injury and danger to life could result.
Caution:
Describes a possibly dangerous situation. If this is not avoided, slight or minor
injuries could result. A warning of possible property damage may also be contained in
the text.
Notice:
Describes a possibly harmful situation. If this is not avoided, the product or anything
in its surroundings can be damaged.
3.2. Explanation of other notes
Note!
Draws attention to something special.
Important!
Indicates usage tips and other useful information.
This icon is used in the operating instructions to indicate
flashing values or parameters
which have to be set or confirmed.

SL
19
3.3. Safety recommendations
Follow the safety instructions to avoid personal injury and property damage. Also, the
valid safety instructions for workplaces must be followed.
•Only connect the unit to a power socket with an earthing contact (PE – protective
earth)!
•The power supply plug serves as a safe disconnecting device from the line and
must always be easily accessible.
•Place the unit on an even surface on a base made of non-flammable 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.
•Set the excess temperature safety installation at least 25 °C below the fire point of
the bath fluid.
•Observe the limited working temperature range when using plastic bath tanks.
•Never operate the unit without bath fluid in the bath.
•Pay attention to the thermal expansion of bath oil during heating to avoid
overflowing of the fluid.
•Prevent water from entering the hot bath oil.
•Do not drain the bath fluid while it is hot!
Check the temperature of the bath fluid prior to draining (e.g., by switching the unit
on for a short moment).
•Use suitable connecting tubing.
•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 units.
•Always turn off the unit and disconnect the mains cable from the power source
before performing any service or maintenance procedures, or before moving the
unit.
•Always turn off the unit and disconnect the mains cable from the power source
before cleaning the unit.
•Always empty the bath before moving the unit.
•Transport the unit with care.
•Sudden jolts or drops may cause damage in the interior of the unit.
•Observe all warning labels.
•Never remove warning labels.
•Never operate units with damaged mains power cables.
•Repairs are to be carried out only by qualified service personnel.
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.

Safety notes for the user
20
Caution:
The temperature controlling i.e. of fluids in a reactor constitutes normal circulator
practice.
We do not know which substances are contained within these vessels.
Many substances are:
•inflammable, easily ignited or explosive
•hazardous to health
•environmentally unsafe
i.e.: dangerous
The user alone is responsible for the handling of these substances!
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.
•Do dangerous steams or gases arise when heating?
Is an exhaust needed when working?
•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.
Notice: Check the safety installations at least twice a year!
•Excess temperature protection according to IEC 61010-2-010.
With a screwdriver turn back the adjustable excess temperature protection until the
shut-down point (actual temperature).
•Low level protection according to IEC 61010-2-010.
To check the function of the float, it can be manually lowered with a screwdriver for
example.
WARNING
This product contains chemicals known to the state of California to cause cancer, birth
defects or other reproductive harm.