Thermo Haake DK15 User manual

Instruction Manual
Flow-Through Cooler DK15
Immersion Cooler EK20/EK30
Part No. 002-4348
1-1-034-2 11.2000
Thermo Haake
(International)
Thermo Haake
(USA)
Thermo Temperature
Control BV
(Benelux)
Dieselstraße 4 25 Nimble Hill Rd. Meerenakkerplein 31
D-76227 Karlsruhe Newington, NH 03801 5652 BJ Eindhoven
Tel.
[phone] Tel. [phone]
Tel.
040 2300236
Fax
[phone] Fax [phone]
Fax
040 2549485
[email protected] [email protected] [email protected]
www.thermohaake.com www.thermohaake.com

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Table of Contents
1
Before starting up:
The lubricating oil in the cooling compressor may flow
into the tubing of the cooling circuit during transport.
This will prevent the cooling unit from functioning.
24 hours should be allowed between unpacking
and setting and starting operation to allow the oil to
collect back in the oil sump.
1. Quality Assurance 2. . . . . . . . . . . . . . . . . . . .
2. Your Contacts at Thermo Haake 2. . . . . . . .
3. Unpacking, Contents of Delivery 4. . . . . . .
3.1 Unpacking 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
3.2 Contents of delivery 4. . . . . . . . . . . . . . . . . . . . . .
3.3 Information concerning the CE sign 5. . . . . . . .
4. Unit Description 6. . . . . . . . . . . . . . . . . . . . . .
4.1 Flow-Through Cooler DK15 6. . . . . . . . . . . . . . .
4.2 Immersion cooler EK20 7. . . . . . . . . . . . . . . . . .
4.3 Immersion cooler EK30 7. . . . . . . . . . . . . . . . . .
4.4 Cooling circuits 8. . . . . . . . . . . . . . . . . . . . . . . . . .
5. Functional Elements 9. . . . . . . . . . . . . . . . . .
5.1 Flow-through cooler DK15: 9. . . . . . . . . . . . . . .
5.2 Immersion coolers EK20 and EK30: 10. . . . . . .
6. Connecting the Hoses 11. . . . . . . . . . . . . . .
7. Fitting an Evaporator Bath Bridge 12. . . .
8. Operation 13. . . . . . . . . . . . . . . . . . . . . . . . . .
8.1 Connecting to the mains 13. . . . . . . . . . . . . . . . . .
8.2 Flow-through cooler DK15 13. . . . . . . . . . . . . . . .
8.3 Immersion coolers EK20 and EK30 13. . . . . . . .
9. Maintenance 13. . . . . . . . . . . . . . . . . . . . . . . .
10. Accessories / Technical Specifications 14
10.1 Fuse values 15. . . . . . . . . . . . . . . . . . . . . . . . . . . .

ThermoHaake
TYP
V/Hz
Dieselstr. 4
D–76227 KARLSRUHE
Quality Assurance / Contacts at Thermo Haake
2
1. Quality Assurance
Dear customer,
Thermo Haake implements a Quality Management System
certified according to EN 29001.
This guarantees the presence of organizational structures
which are necessary to ensure that our products are devel-
oped, manufactured and managed according to our custom-
ers expectations. Internal and external audits are carried out
on a regular basis to ensure that our QMS system is fully
functional.
We also check our products during the manufacturing pro-
cess to certify that they are produced according to the speci-
fications as well as to monitor correct functioning and to con-
firm that they are safe. This is why we initiate this monitoring
process of important characteristics already during
manufacturing and record the results for future reference.
The “Final Test” label on the product is a sign that this unit
has fulfilled all requirements at the time of final manufactur-
ing.
Please inform us if, despite our precautionary measures,
you should find any product defects. You can thus help us to
avoid such faults in future.
2. Your Contacts at Thermo Haake
Please get in contact with us or the authorized agent who
supplied you with the unit if you have any further questions.
Thermo Haake (International) Thermo Haake (USA) Thermo Temperature
Control BV (Benelux)
Dieselstraße 4 25 Nimble Hill Rd. Meerenakkerplein 31
D-76227 Karlsruhe, Germany Newington, NH 03801 5652 BJ Eindhoven
Tel. [phone] Tel. [phone] Tel. [phone]
Fax [phone] Fax [phone] Fax [phone]
Hotline [phone]
E-mail [email protected] [email protected] [email protected]
www.thermohaake.com www.thermohaake.com
The following specifications should be given when product
enquiries are made:
Unit name printed on the front of the unit and specified on
the name plate.

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Safety Notes
3
Safety Notes
The intended workplace should correspond to a laboratory
or pilot plant environment. The user should have an educa-
tion level which is at least equivalent to a trained laboratory
worker or specialized chemist. The following list should be
seen as an example.
The device may not be operated if there are any doubts
regarding a safe operation due to the outer appearance.
A safe operation of the instrument cannot be guaran-
teed if the user does not comply with this manual.
Only use this unit solely for the intended application.
Repairs, alterations or modifications must only be car-
ried out by specialist personnel. Considerable damage
can be caused by improper repairs. The Thermo Haake
service department is at your disposal for repair work.
Do not operate the unit with wet or oily hands.
This device is not designed according to the standard
EN 60601-1: 1990 (DIN VDE 0750-1 and IEC 601-1) and
should not be operated in rooms used for medical pur-
poses and/or in the vicinity of patients.
The following measures were taken to protect the operator:
•Protection Class I according to VDE 0106 T1
i. e. protection against electric shocks by grounding all parts
within easy reach of the operator.
The device must only be connected to mains receptacles
with a protective ground.
•Protection IP 30 according to DIN 40 050
i. e. regarding the protection against accidently touching live
parts and damage by foreign matter, it has been ensured that
foreign bodies with a thickness or diameter of more than
2.5 mm cannot penetrate. Do not push wires or tools through
any of the openings.
No special precautions were taken against the penetration of
water and dust. The device should therefore not be used in a
dusty atmosphere or in the neighborhood of spray water.
Complete separation from the mains is required when:
– all dangers caused by this device are to be avoided,
– cleaning is carried out,
– repairs or maintenance work is about to be carried
–out (by service personnel only).

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View of open
packing from above
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Unpacking / Contents of Delivery
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3. Unpacking, Contents of Delivery
3.1 Unpacking
Please follow the procedure stated below in order to
avoid damaging the EK20/EK30 cooling hose:
Grasp middle polystyrene packaging material at and
remove in an upwards direction.
Do not bend or allow the cooling hose to kink!
Remove the unit and remaining packaging material by lifting
at the grips .
Transport damage?
•Notify carrier (forwarding merchant, railroad,
post office) etc,
•Compile a damage report.
Before return delivery:
•Inform dealer or manufacturer
(Small problems can often be dealt with on the spot).
3.2 Contents of delivery (please check)
DK15 Flow-through cooler:
2 Union nuts (E), (fitted to the unit)
2 Capping plugs (D), (fitted to the unit)
2 Hose connection pieces for 8mm i.d. hoses (B),
2 Hose connection pieces for 12mm i.d. hoses (C),
4 Hose clips, 1 Instruction manual,
1 Warranty card (please fill out and return)
EK20 and EK30 Immersion coolers:
1 Set of mounting elements (2 platings, 2 screws) for fixing
the heat exchanger to the Thermo Haake bath bridge H32,
1 Instruction manual, 1 Warranty card (please return)

Information concerning the CE sign
5
3.3 Information concerning the CE sign
Thermo Haake measuring and control instruments carry the
CE sign which confirms that they are compatible with the EU
guideline 89/336/EEC (electromagnetic compatibility). The
tests are carried out according to module H (official sheet
L380 of the European Community) as our quality assurance
system is certified according to DIN / ISO 9001.
It was tested according to the strict EMV test requirements
of the EN61326-1/A1 (EMV requirements for electrical
equipment for measuring technology, conduction techno-
logy and laboratory usage). This means it was tested for in-
terference resistance and interference emission according
to public low-voltage mains (household and commercial
usage).
The following basic standards were applied in detail:
Interference resistance:
EN61000–4–2 electrostatic discharge
EN61000–4–3 electromagnetic fields
EN61000–4–4 fast transients
EN61000–4–5 surge voltages
EN61000–4–6 wire–guided HF–signals
EN61000–4–8 magnetic field of mains frequency
EN61000–4–11 voltage drop/short–time interruption
Interference emission:
CISPR16/class B wire–guided interference emission
CISPR16/class B radiated interference emission
EN 61000–3–2 Voltage variations and flickering
EN 61000–3–3 Over-compensation voltage flows
The application in industrial and commercial (public mains)
environments is thus possible.
A declaration of conformity is supplied with the ordered unit
on request.
Our strict standards regarding operating quality and the re-
sulting considerable amount of time and money spent on de-
velopment and testing reflect our commitment to guarantee
the high level of quality of our products even under extreme
electromagnetic conditions. Practice however also shows
that even units which carry the CE sign such as monitors or
analytical instruments can be affected if their manufacturers
accept an interference (e.g. the flimmering of a monitor) as
the minimum operating quality under electromagnetic com-
patibility conditions. For this reason we recommend you to
observe a minimum distance of approx. 1 m from such units.

Heating / Open-bath circulator
External
Object DK15
Unit Description
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4. Unit Description
Immersion and flow-through coolers with air-cooled cooling
compressors are suitable for various cooling applications.
This cooler range offers individual solutions for the following
applications:
•Cooling smaller systems down to –30°C.
•Removing reaction heat.
•Replacing tap water cooling for open-bath and heating
circulators.
•Creating constant temperature conditions.
The lowest temperatures which can be reached using these
coolers, respective cooling down times and temperature ac-
curacy depend on the following factors:
•The volume of heat transfer liquid.
•The type of heat transfer liquid and it’s viscosity at the
desired temperature.
•The bath vessel and covering insulation.
•The heat created by units immersed in the bath used
to recirculate the heat transfer liquid.
4.1 Flow-Through Cooler DK15
The DK15 is designed to be integrated within the heat trans-
fer liquid circuit of e.g. a heating circulator. The heat is re-
moved from the heat transfer liquid as it is pumped through
the cooler.
The coolant and insulating materials are CFC-free.
R134a is used as the coolant.
The flow-through cooler requires an external pump (e.g. the
circulation pump of a heating circulator). Anti-freeze must be
added if water is to be used as the bath liquid.
Flow-through cooler DK15 set-up
The cooler is positioned at the return flow hose between the
heating circulator and the external object to be temperature
controlled.

Unit Description
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The flow-through cooler DK15 is mainly used as a substitute
for tap water cooling.
The lowest temperature of the liquid pumped through the
cooler is dependent on the following factors:
•The flow rate [l/min].
•The type of heat transfer liquid and it’s viscosity.
•The heat insulation and size of bath vessel of the heat-
ing circulator.
•The length, diameter and insulation of the hose circuit.
•The energy consumption of the object to be tempera-
ture controlled.
Working temperatures of < 15°C are easily attainable with
any size Thermo Haake heating circulator.
4.2 Immersion cooler EK20
This unit is designed to cool alcohol in a 5 l Dewar vessel
down to about –20°C. Constant temperature controlling is
achieved by regulated counter-heating using an open-bath
circulator.
Thermo Haake baths with a volume of up to approx. 20 liters
are cooled to below –5°C. The graphs in chapter 8 show tem-
peratures and cooling times using Thermo Haake circula-
tors.
The mounting element necessary for mounting the evapora-
tor (cooling coil) to Thermo Haake baths fitted with a bath
bridge is a standard accessory.
The coolant and insulating materials are CFC-free.
R134a is used as the coolant.
4.3 Immersion cooler EK30
The EK30 is the more powerful version of the EK20, de-
signed for baths with a depth of at least 200 mm. Tempera-
tures as low as –30°C in a 5 l Dewar vessel can be reached.
This cooler model is also completely CFC-free.

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Unit Description
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Immersion cooler EK20 and EK30 applications
The external evaporator (cooling coil) is immersed into a
bath and the coil must be completely immersed within the liq-
uid.
The lowest temperature which can be reached in a bath de-
pends on the following factors:
•The volume of heat transfer liquid.
•The bath vessel insulation.
•The heat conductivity of the liquid to be cooled.
•The heat generated within the bath.
It should be differentiated between the two major applica-
tions:
•Cooling a bath vessel:
The units EK20 and EK30 do not have a built-in control-
ler. They will cool the object to the lowest possible tem-
perature, which is governed by the specific properties
of the object. As the liquid is typically not in motion, a
wide temperature distribution has to be expected.
•Cooling open-bath circulators:
Open-bath circulators are equipped with their own
heater and pump. The cooler also operates as a per-
manent cooling source. However as the circulator op-
erates by controlled counter-heating, it is possible to at-
tain both a constant temperature level and an even dis-
tribution throughout the bath.
4.4 Cooling circuits
The cooling capacity for air-cooled units (heat exchanger =
liquefier) depends to a great extent on the free flow of cooling
air through the two ventilation grids.
These grids (one at the front and one at the rear side) must
therefore be kept free of all obstacles at all times!
The cooling capacity is reduced at ambient tem-
peratures of > 30°C!

Functional Elements
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5. Functional Elements
5.1 Flow-through cooler DK15:
Front Rear
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1Mains switch
2Ventilation grid front (air intake)
5Mains cable
6Ventilation grid rear (air exhaust)
7Hose connection inlet
8Hose connection outlet
9Name plate
10 Circuit breakers (with 115V unit only 1 circuit breaker)

Functional Elements
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5.2 Immersion coolers EK20 and EK30:
EK20 EK30
Front Rear
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1Mains switch
2Ventilation grid front (suction side)
3Connection hose 1.5 m long
4Cooling coil
made from stainless steel 18/8
5Mains cable
6Ventilation grid rear (air exhaust)
9Name plate
10 Circuit breakers (with 115V unit only 1 circuit breaker)

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Connecting the Hoses (only for the DK15)
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6. Connecting the Hoses
(only for flow-through cooler DK15)
Inlet = Hose from external object
Outlet = Hose to return nozzle on circulator
The hose connections pieces for 8 or 12 mm ∅B and the
unions Esupplied with the unit are screwed onto the
threaded nozzles A(7+ 8). Threaded nozzles Amust be
held secured using a wrench.
Hoses must not be folded or bent sharply!
A wide radius should be used if turns have to be
made!
Hoses might become brittle after prolonged use or
they may get very soft. They should therefore be
checked regularly and exchanged if necessary!
Do not exert mechanical loads on hoses of refriger-
ated units. Danger of breakage!
Secure hoses with clips!

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Fitting an Evaporator to a Bath Bridge
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7. Fitting an Immersion Cooler Evaporator
to a Thermo Haake Bath Bridge
1Slide the supplied metal plates into the slot above the
cooling coil.
2Remove the covering plate on the Thermo Haake bath
bridge by unscrewing two screws.
3Insert the evaporator through the opening and secure
the fitted plates with 4 screws.
Do not bend the evaporator coil!

115 V
230 V
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Operation / Maintenance
13
8. Operation
8.1 Connecting to the mains
Only attach this unit to mains sockets with a grounded earth.
Compare the local mains voltage with the specifications
given on the name plate. Voltage deviations of +/- 10% are
permissible. The socket must be rated as suitable for the to-
tal power consumption of the unit.
8.2 Flow-through cooler DK15
WARNING:
The flow-through cooler must only be used with heat transfer
liquids with a freezing point below –30°C. If the heat transfer
liquid were to freeze in the heat exchanger of the DK15, the
resulting volume expansion could cause the heat exchanger
to burst. Heat transfer liquid would then seep into the coolant
circuit and this would irreparably damage the compressor.
The danger of freezing of an unsuitable heat transfer liquid
is also present at temperatures well above 0°C in the circuit
between the circulator and the cooler: Any interruption of the
flow (hose kink, pump failure etc.) results in the cooling of the
liquid within the heat exchanger to below –20°C and the sort
of damage mentioned above.
The flow-through cooler must also be switched off
if the circulator is shut down!
8.3 Immersion coolers EK20 and EK30
If pure water or water plus a small amount of antifreeze is
used as the heat transfer liquid, a thick coating of ice can
form on the coil.
This clearly reduces the cooling capacity of the immersion
cooler.
Remove ice by heating up if necessary. Do not re-
move the ice mechanically!
9. Maintenance
Regular cleaning ( 2 to 4 times a year according to degree
of dust) is required to ensure a constantly high cooling ca-
pacity.
The liquefier fins should by cleaned using compressed air.

Accessories Order No.
Clamp mounting for fixing the
EK20 or EK30 to bath walls
up to a thickness of 25 mm 333–0452
Technical specs. acc. to DIN 58966 DK15 EK20 EK30
Working temperature range °C –15..150 –20..150 –30..150
Cooling capacity at +20°C W 300 300 500
at –10°C W 150 150 250
at –40°CW – – –
at –70°CW – – –
Hose length cm – 150 150
Cooling coil dimensions (∅xL) mm – 81 x 145 81 x 195
Connecting nozzles (∅)mm 12 and 8 – –
Evaporator material stainless steel stainless steel stainless steel
Overall dimensions (WxLxH) mm 225x465x380 225x465x380 225x465x380
Weight kg 22 22 23
Ambient temperature range °C 10..40 10..40 10..40
Total power consumption VA 400 400 600
Order no. for 230 V/50–60 Hz 106–1151 322–1201 323–1301
for 115 V/60 Hz 106–1152 322–1202 323–1302
Cooling down times with the EK30
Cooling down times with the EK20
Cooling down time [min] Cooling down time [min]
Working temperature [deg C] Working temperature [deg C]
Accessories / Technical Specifications
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10. Accessories / Technical Specifications

Accessories / Technical Specifications
15
10.1 Fuse values
Unit type Mains voltage Fuse(s) at the
rear panel
DK15 230V 2x5 A
115V 1x10 A
EK20 230V 2x5 A
115V 1x10 A
EK30 230V 2x5 A
115V 1x10 A
Subject to alterations Printed in Germany (FRG) 002–4348
1.1.034.2–11.2000