Julabo FT402 User manual

English
Operating manual
Immersion Coolers
FT402
FT902
FT903
FT 4 02
°C
FT902
°C
JULABO GmbH
77960 Seelbach / Germany
Tel. [phone]
Fax [phone]
[e-mail]
www.julabo.com
1.950.4620.en.V08 06/22

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 immersion coolers. For optimal utilization of all functions, we
recommend that you thoroughly study this manual prior to beginning operation.
Unpacking and inspecting
Unpack the immersion cooler 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.
Important: keep operating manual for future use

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TABLE OF CONTENTS
1. Intended use ................................................................................................................... 4
1.1. Description.................................................................................................................. 4
2. Operator responsibility – Safety instructions................................................................... 4
2.1. Disposal...................................................................................................................... 7
2.2. EC Declaration of Conformity ..................................................................................... 8
2.3. UKCA Declaration of Conformity .............................................................................. 11
2.4. Technical specifications............................................................................................ 15
3. Operating controls and functional elements.................................................................. 19
4. Safety notes for the user............................................................................................... 21
4.1. Explanation of safety notes....................................................................................... 21
4.2. Explanation of other notes ........................................................................................ 21
4.3. Safety instructions .................................................................................................... 22
5. Preparations.................................................................................................................. 23
5.1. Installation................................................................................................................. 23
5.2. Immersion probe / Sensor connection - Pt100.......................................................... 24
6. Operating procedures ................................................................................................... 25
6.1. Power connection ..................................................................................................... 25
6.2. Switching on / Start - Stop ........................................................................................ 25
6.3. Automatic / non-automatic start mode ...................................................................... 26
6.4. Setting the temperatures........................................................................................... 27
6.5. Temperature control.................................................................................................. 27
7. Troubleshooting guide / Error messages ...................................................................... 28
8. Electrical connection ..................................................................................................... 29
9. Cleaning / repairing the unit .......................................................................................... 30

Intended use
4
1. Intended use
JULABO immersion coolers have been designed for temperature application to specific fluids
in a bath tank.
For example: Dewar vessels, beakers, or other containers in conjunction
with heating circulators for continuous countercooling
or for dry-ice substitution.
JULABO immersion 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
PID1
Pt100
The immersion coolers are operated via the keypad. The implemented
microprocessor technology allows to set and to store the setpoint that can
be indicated on the LED temperature display.
The PID temperature control adapts the cooling supply to the thermal
requirements of the bath.
Electrical connection:
Connection for Pt100 external sensor for temperature measurement and
control.
Model FT402 is provided with a handle for portable use.
Models FT902, FT903 are equipped with four castors. Two of the castors
include locking levers that should be pressed down after setting up the unit
to prevent it from moving.
The immersion probe is connected to the instrument with a flexible, specially
insulated tube. On models FT902, FT903 the immersion probe is also
flexible and may be adjusted precisely to different positions within the vessel.
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.

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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 GmbH
Gerhard-Juchheim-Strasse 1
77960 Seelbach / Germany
[phone]
[phone]
[e-mail]
www.julabo.com
Safety instructions for the operator:
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 the 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 configure, install, maintain, or repair the circulator.
Persons who operate the circulator must be trained in the particular tasks by qualified
personnel. The summarized user guidance (short manual) and the specification table with
information on individual parameters are sufficient for this.

Operator responsibility – Safety instructions
6
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 (1 + 2) to the front of the unit so they are highly visible:
1 Danger area. Attention! Observe instructions.
(operating manual, safety data sheet)
2 Carefully read the user information prior to beginning operation.
Particular care and attention is necessary because of the wide operating range. There are
thermal dangers: Touchable parts of the probe can be very cold. The user must attach the
enclosed safety labels to the unit so they are easily visible.
Attention:
- Note a minimum bending radius of the
probe.
- Do not touch cold probe.

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2.1. Disposal
The product may be used with oil as bath fluid. These oils fully or partially consist of mineral
oil or synthetic oil. For disposal, follow the instructions in the material safety data sheets.
This unit contains 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.
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
crossed-out trash can to be disposed of separately in an environmentally
friendly manner.
Contact an authorized waste management company in your country.
Disposal with household waste (unsorted waste) or similar collections of
municipal waste is not permitted!

Operator responsibility – Safety instructions
8
2.2. EC Declaration of Conformity

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Operator responsibility – Safety instructions
10

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2.3. UKCA Declaration of Conformity
UK Office: JULABO UK Ltd., Unit 7, Casterton Road Business Park, Old Great North Road,
Little Casterton, Stamford, PE9 4EJ, United Kingdom, Tel.: [phone]

Operator responsibility – Safety instructions
12

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2.3.1. Warranty conditions

Operator responsibility – Safety instructions
14
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 warranty can be extended to two years free of charge. The
1PLUS warranty gives the user a free extended warranty to 24 months, limit to a maximum of
10,000 hours of service.
A prerequisite for this is that the user registers the device at www.julabo.com, quoting its serial
number, within four weeks of initial operation. The warranty applies from the date of JULABO
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.

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2.4. Technical specifications
Immersion cooler FT402
Working temperature range °C -40 ... 30
Temperature stability °C ±0.5
Temperature selection digital
Temperature indication LED
Resolution °C 0.1
Temperature control PID1
Cooling capacity
Medium ethanol
°C
kW
[phone]
0.45 0.36 0.14 0.03
Cooling compressor 1-stage
Refrigerant 230 V / 50 Hz
115 V / 60 Hz
R452A
R404a
Electrical connections:
Pt100 external sensor Pt100
Overall dimensions (WxDxH) cm 20x30x43
Immersion probe (Lxdia.) cm 12x5
Immersion probe, flexible (Lxdia.) cm -------
Connection tubing (L) cm 120
Noise level, distance 1 m dBA 61
Weight kg 24
Ambient temperature °C 5 ... 35 (32 with R452A)
Mains power connection V/Hz 230/50/60
Current input (at 230 V) A 3
Mains power connection V/Hz 115/60
Current input (at 115 V) A 4
All measurements have been carried out at: rated voltage and frequency. Ambient
temperature 20 °C.

Operator responsibility – Safety instructions
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Immersion cooler FT902 FT903
Working temperature range °C -90 ... 30
Temperature stability °C ±1
Temperature selection digital
Temperature indication LED
Resolution °C 0.1
Temperature control PID1
Cooling capacity FT903
°C
20
10
0
-10
-20
-30
(Medium ethanol)
kW
0.3
0.29
0.27
0.26
0.25
0.24
Cooling capacity FT903
°C -40 -50 -60 -70 -80
(Medium ethanol)
kW
0.23
0.21
0.18
0.13
0.05
Cooling capacity FT902
°C 20 10 -20 -40 -80
(Medium ethanol) kW 0.3 0.27 0.24 0.2 0.07
Cooling compressor 2-stage
Refrigerant 230 V / 50 Hz
115 V / 60 Hz
R404A/R23
R404A/R23
Electrical connections:
Pt100 external sensor Pt100
Overall dimensions (WxDxH) cm 38x55x60
Immersion probe (Lxdia.) cm ------- see dimensions page 18
Immersion probe, flexible
(Lxdia.)
cm 65x1.5
Connection tubing (L) cm 160
Noise level, distance 1 m dBA 60
Weight kg 50 50
Ambient temperature °C 5 ... 35 5 ... 40
Mains power connection V/Hz 230/50/60
Current input A 6 6
Mains power connection V/Hz 115/60 -
Current input A 12 -
All measurements have been carried out a: rated voltage and frequency. Ambient temperature
20 °C.

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Safety installations according to IEC 61010-2-010:
Alarm message optical + audible (permanent)
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 for use in explosive environment.
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.

Operator responsibility – Safety instructions
18
Information about the used refrigerants
The Regulation (EU) No. 517/2014 on fluorinated greenhouse gases applies to all systems
which contain fluorinated refrigerants and replaces (EC) 842/2006.
The aim of the Regulation is to protect the environment by reducing emissions of fluorinated
greenhouse gases.
Among other things it regulates the emission limits, use and recovery of these substances. It
also contains requirements for operators of systems which require / contain these substances
to function.
Under Regulation 517/2014, the operator of a system of this nature has the following duties:
•The operator must ensure that the equipment is checked at regular intervals for leaks.
•These intervals depend on the CO2equivalent of the system. This is calculated from
the refrigerant fill volume and type of refrigerant. The CO2equivalent of your system is
shown on the model plate.
•The operator undertakes to have maintenance, repair, service, recovery and recycling
work carried out by certified personnel who have been authorized by JULABO.
•All such work must be documented. The operator must keep records and archive them
for at least five years. The records must be submitted to the relevant authority on
request.
Refer to the text of the Regulation for further information.

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3. Operating controls and functional elements
FT402 Front view Rear view
1 - 7
8
9
10
FT 402
°C
11
12
13
10
A
M
P
10
A
M
P
1
Mains power switch, illuminated
Ion
off
2 Edit keys (increase/decrease setting)
3 Enter key (store)
4 LED temperature display
5 Control indicator –Heating (without function)
6 Control indicator – Cooling
7 Control indicator – Alarm

Operating controls and functional elements
20
FT902, FT903 Front view Rear view
16
A
M
P
16
A
M
P
11
12
13
15
8
Pt100
External Pt100 sensor connector
Included with each unit:
Order No. 8 981 003 Pt100 sensor, 200x6 mm dia., stainless steel
9 Clamp for immersion probe
10 Immersion probe
11
Mains power cable with plug
12 Mains circuit breakers (resettable)
FT402 10 A FT902, FT903 15 A
13 Carrying handle
14 Venting grid, removable (only FT902, FT903)
15 Castor with brake (at the front)
Castor without brake (at the back)
FT902
°C
1-7
8
9
10
15
14
15
A
M
P