haake_ek45
TRANSCRIPT
Analyze Detect Measure Control TM
Instruction ManualImmersion CoolerImmersion CoolerImmersion CoolerImmersion CoolerImmersion Cooler
HAAKE EK45/90HAAKE EK45/90HAAKE EK45/90HAAKE EK45/90HAAKE EK45/90
Table of Contents
1. Key to Symbols 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
1.1 Symbols used in this manual 3. . . . . . . . . . . . . . . . . .1.2 Symbols used on the unit 3. . . . . . . . . . . . . . . . . . . . .
2. Quality Assurance 4. . . . . . . . . . . . . . . . . . . . . . . . . .
3. Your Contacts atThermo Electron (Karlsruhe) GmbH 4. . . . . . . . . .
4. Safety Notes 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
5. Unit Description 7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
5.1 Immersion cooler HAAKE EK45 7. . . . . . . . . . . . . . .5.2 Immersion cooler HAAKE EK90 7. . . . . . . . . . . . . . .5.3 Reachable temperature 7. . . . . . . . . . . . . . . . . . . . . .5.4 Temperature control 8. . . . . . . . . . . . . . . . . . . . . . . . .5.5 Cooling circuits 8. . . . . . . . . . . . . . . . . . . . . . . . . . . . .
6. Unpacking / Setting Up 9. . . . . . . . . . . . . . . . . . . . . .
6.1 Transportation damage? 9. . . . . . . . . . . . . . . . . . . . .6.2 Contents of delivery 9. . . . . . . . . . . . . . . . . . . . . . . . .6.3 Ambient conditions according to EN 61010 9. . . . .6.4 Resting time after transportation 9. . . . . . . . . . . . . . .6.5 Ventilation 9. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .6.6 Information concerning the CE sign 10. . . . . . . . . . . .
7. Functional and Operating Elements 11. . . . . . . . . .
7.1 Immersion cooler HAAKE EK45 11. . . . . . . . . . . . . . .7.2 Immersion cooler HAAKE EK90 12. . . . . . . . . . . . . . .7.3 Temperature controller 13. . . . . . . . . . . . . . . . . . . . . . .
8. Mounting Special Accessory (only for EK45) 14. .
8.1 Fitting the evaporator in the optional clampingbracket 14. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9. Installation 15. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
9.1 Cooling of liquid baths 15. . . . . . . . . . . . . . . . . . . . . . .
10. Bath Liquids 16. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11. Connecting Up 18. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
11.1 Connecting to the mains 18. . . . . . . . . . . . . . . . . . . . .
Table of Contents
11.2 Connecting a sensor 18. . . . . . . . . . . . . . . . . . . . . . . . .11.3 Changing the mains plug 18. . . . . . . . . . . . . . . . . . . . .11.4 Fuses on the unit 18. . . . . . . . . . . . . . . . . . . . . . . . . . . .
12. Operating 19. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
12.1 Displaying the actual temperature 19. . . . . . . . . . . . .12.2 Setting the desired set temperature 20. . . . . . . . . . . .
13. Faults 21. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
13.1 Messages shown on the display 15 21. . . . . . . . . . . .13.2 Faults with the HAAKE EK45 21. . . . . . . . . . . . . . . . .13.3 Faults with the HAAKE EK90 22. . . . . . . . . . . . . . . . .
14. Checking the Parameters 23. . . . . . . . . . . . . . . . . . . .
15. Maintenance 24. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
15.1 Cleaning the fins of the liquefier 24. . . . . . . . . . . . . . .15.2 Discarding the unit 24. . . . . . . . . . . . . . . . . . . . . . . . . .
16. Accessories / Technical Specifications 25. . . . . . .
16.1 Fuse values 25. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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up
down
set
Key to Symbols
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1. Key to Symbols
1.1 Symbols used in this manual
Warns the user of possible damage to the unit, drawsattention to the risk of injury or contains safety notesand warnings.
Denotes an important remark.
1 Indicates the next operating step to be carried outand…
⇒ …what happens as a result thereof.
1.2 Symbols used on the unit
Caution: Read the instruction manual!
Activating the input possibilities
Value alteration (↑) higher / (↓) lower
Only for the EK90:
Fault display lighton = the unit has a fault; off = the unit does not have a fault
Reset button (for usage after a fault or interruption).
Thermo Electron (Karlsruhe) GmbH
TYP
V/Hz
Dieselstr. 476227 Karlsruhe
Contacts at Thermo Electron (Karlsruhe) GmbH
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2. Quality Assurance
Dear customer,Thermo Electron (Karlsruhe) implements aQualityManage-ment System certified according to DIN/EN/ISO 9001:2000.This guarantees the presence of organizational structureswhich are necessary to ensure that our products are devel-oped, manufactured andmanaged according to our custom-ers expectations. Internal and external audits are carried outon a regular basis to ensure that our QMS 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 monitoringprocess of important characteristics already duringmanufacturing and record the results for future reference.
The “Final Test” label on the product is a sign that this unithas 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 toavoid such faults in future.
3. Your Contacts atThermo Electron (Karlsruhe) GmbH
Please get in contact with us or the authorized agent whosupplied you with the unit if you have any further questions.
Thermo Electron Corporation
International / GermanyThermo Electron (Karlsruhe) GmbHDieselstrasse 4D-76227 Karlsruhe, GermanyTel. +49(0)721 4094--444Fax +49(0)721 4094--300Hotline +49(0)18 05 04 22 [email protected]
The following specifications should be given when productenquiries are made:
Unit name printed on the front of the unit and specified onthe name plate.
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Safety Notes
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4. Safety Notes
These notes are intended to draw your attention to riskswhich onlyYOU can recognize and avoid or overcome. Theyare intended to enhance your own safety consciousness.
We have set the highest quality standards for ourselves andthis unit during development and production. Every unitmeets relevant safety regulations. The correct unit usageand proper handling is however solely your responsibility.The following notes must be observed:
This instruction manual must be carefully studied! Itcontains important information on the connection to thelocal mains supply, correct unit usage and safe hand-ling.
Check for transportation damageduringunpacking.Getin contact with supplier and/or carrier for settlement ofdamage claims. Do not try to start up a damaged unit be-fore the damage has been repaired or you have ascer-tained the affect of the damage.
Ensure that this manual is always at hand for every unitoperator.
Only use this unit solely for the intended application.
Repairs, alterations or modifications must only be car-ried out by specialist personnel. Consider the manufac-turer’s instruction manuals.Considerable damage can be caused by improper re-pairs. The Thermo Electron (Karlsruhe) service depart-ment is at your disposal for repair work.
Do not operate the unit with wet or oily hands.
Do not expose the unit to spray water.
Do not clean the unit with solvents (fire risk!) -- a wetcloth soaked in household detergent is normally suffi-cient.
This device is not designed according to the standardEN 60601-1: 1990 (DIN VDE 0750-1 and IEC 601-1) andshould not be operated in rooms used for medical pur-poses and/or in the vicinity of patients.
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Safety Notes
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The evaporator coil of the unit must not be kinked, bentor twisted. This can lead to the evaporator coil beingdamaged and to a leakage of refrigerant.
The followingmeasures were taken for the protection ofthe operator:
• Protection Class I according to VDE 0106 T1i.e. protection against electric shocks by grounding allparts within easy reach of the operator.
The device must only be connected to mains recep-tacles with a protective ground.
• Protection IP 20 according to EN 60529i. e. regarding the protection against accidently touch-ing live parts and damage by foreignmatter, it has beenensured that foreign bodies with a thickness or diame-ter of more than 12 mm cannot penetrate.
No special precautions were taken against the pe-netration of water and dust. The device should there-fore not be used in a dusty atmosphere or in the neigh-borhood of spray water.
Do not insert wires or tools in any of the openings.
Complete separation from the mains is requiredwhen:
-- all dangers caused by this device are tobe avoided,
-- Cleaning is carried out,
-- repairs or setting alterations are about to becarried out.
Complete separation means:
Pull out the mains plug!
Unit Description
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5. Unit Description
5.1 Immersion cooler HAAKE EK45
The EK45 is a cooling unit with a one-stage refrigerating cir-cuit with which amaximum low temperature of --45°C can bereached. The coolant circuit’s evaporator coil shaped as spi-ral-shaped cooling element is connected to the cooling unitvia a flexible, specially heat-insulated hose. It can be immer-sed in vessel with an inner diameter of > 85 mm and a depthof > 200 mm. The cooling unit compressor is air-cooled fullyhermetically sealed.
5.2 Immersion cooler HAAKE EK90
Similar to the EK45, however with a two-stage refrigeratingcircuit with which a maximum low temperature of --90°C canbe reached. The cooling element is designed as a flexiblecorrugated coil and can thus be adapted to suit the shape ofthe vessel available. The inner diameter of the vessel musthowever not be smaller than 110 mm (2 x the smallest bend-ing radius of 40mm= 80mmplus 2 x the diameter of the cor-rugated coil at 13 mm = 26 mm), whereas the vessel depthcan be as small as only 100 mm. The dimensions are theminimum dimensions to which the user can form the coolingelement. This should not however be practised often. Fre-quent bending with very small radii can damage the corru-gated coil. If multiple bending is necessary, aminimumdiam-eter of at least 250 mm should be observed (bending radiusof 110 mm).
5.3 Reachable temperature
The lowest possible temperature in a bath and the shortestcooling down time are dependent on the following:
• the volume of liquid to be cooled,
• the type of liquid and its viscosity at the desiredworkingtemperature,
• the heat conductivity of the liquid to be cooled,
• the bath vessel and covering insulation,
• the heat created by any unit immersed in the bath usedto recirculate or stir the liquid.
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Unit Description
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The lowest temperatures possible for the EK45 and EK90specified above were reached in a Dewar vessel with a vol-ume of two liters. Methylcyclohexane was used as the bathliquid and the bath was not stirred.
5.4 Temperature control
Both units are equippedwith a built-in temperature controllerwith a red LEDdisplay and are suppliedwith a Pt100 temper-ature sensor fitted as standard. The sensor should be lo-cated in the bath in the direct vicinity of the evaporator coil.A temperature accuracy of approx. 1 to 2°C is possible. Anytemperature within the working temperature range can beset. A heater is necessary for applications which requiretemperatures above the respective ambient temperature.
The temperature controller features the display of the actualtemperature, the set temperature and a control status dis-play. A series of parameters can be entered and the Pt100sensor is monitored for breakage and short-circuiting.
5.5 Cooling circuits
Cooling requires the removal of heat. This is carried out forthese units by heat exchangers, which drawoff and expel theheat. The cooling capacity for air-cooled units (heat ex-changer = liquefier) depends to a great extent on the freeflow of cooling air through the two ventilation grids. Thesegrids (one at the front and one at the rear side) must there-fore be kept free of all obstacles at all times!
The units are run on environmentally-friendly and CFC-freerefrigerants.
The cooling capacity is reduced at ambient tem-peratures of > 30°C!
Pt100 cable length 2500 mm
2
6
60 50
ø6
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Unpacking / Setting Up
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6. Unpacking / Setting UpDo not pull, push, twist or similarlymishandle the evaporatorcoil. It must never be kinked or bent too narrowly.
6.1 Transportation damage?
• Notify carrier (forwarding merchant, railroad, post office)• Compile a damage report,• Inform dealer or manufacturer
(Small problems can often be dealt with on the spot).
6.2 Contents of delivery
EK45 or EK90 cooler with a Pt100 sensor
6.3 Ambient conditions according to EN 61010
• indoors, max. 2000 meters above sea level,• ambient temperature 5 ... 40° C,• relative humidity max. 80%/31°C (→ 50%/40°C)• excess voltage category II, contamination level 2
6.4 Resting time after transportationAs we can not guarantee that our coolers are always trans-ported upright, lubrication oil can leak from the compressorinto the cooling circuit. If the cooler is started up whilst still inthis state, the compressor may be damaged to the lack of oil.
Rest the unit for 24 hours after setting up.
6.5 Ventilation
Keep both ventilation grids 2 and 6 at the front/rear freefrom obstruction to ensure unhindered air circulation.Blocked ventilation grids lead to increased unitheating which in turn reduces the cooling capacityand thus impairs correct functioning.
Information concerning the CE sign
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6.6 Information concerning the CE sign
The measuring and control instruments from Thermo Elec-tron (Karlsruhe) carry the CE sign which confirms that theyare compatible with the EU guideline 89/336/EEC (electro-magnetic compatibility). The tests are carried out accordingto module H (official sheet L380 of the European Commu-nity) as our quality assurance system is certified accordingto DIN / ISO 9001.
It was tested according to the strict EMV test requirementsof the EN61326-1/A1 (EMV requirements for electricalequipment for measuring technology, conduction techno-logy and laboratory usage). This means it was tested for in-terference resistance and interference emission accordingto public low-voltage mains (household and commercialusage).The following basic standards were applied in detail:
Interference resistance:EN61000--4--2 electrostatic dischargeEN61000--4--3 electromagnetic fieldsEN61000--4--4 fast transientsEN61000--4--5 surge voltagesEN61000--4--6 wire--guided HF--signalsEN61000--4--8 magnetic field of mains frequencyEN61000--4--11 voltage drop/short--time interruption
Interference emission:CISPR16/class B wire--guided interference emissionCISPR16/class B radiated interference emission
EN 61000--3--2 voltage variations and flickeringEN 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 uniton request.
Our strict standards regarding operating quality and the re-sulting considerable amount of time andmoney spent on de-velopment and testing reflect our commitment to guaranteethe high level of quality of our products even under extremeelectromagnetic conditions. Practice however also showsthat even units which carry the CE sign such as monitors oranalytical instruments can be affected if their manufacturersaccept an interference (e.g. the flimmering of a monitor) asthe minimum operating quality under electromagnetic com-patibility conditions. For this reason we recommend you toobserve aminimum distance of approx. 1 m from such units.
Functional and Operating Elements
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7. Functional and Operating Elements
7.1 Immersion cooler HAAKE EK45
Front Rear
1
2
3
4
6
1012 11 A
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9 5
A Symbol: Read the instruction manual!1 Mains switch2 Ventilation grid front (suction side)3 Connection hose 1.5 m long4 Evaporator coil (cooling coil)
made from stainless steel 18/85 Mains cable6 Ventilation grid rear (air exhaust)9 Name plate10 Fuses (if this fuse is triggered, see chap. 11.4)11 Temperature controller with display (see 7.3)12 Socket for Pt100 sensor
Functional and Operating Elements
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7.2 Immersion cooler HAAKE EK90
Front Rear
1
2
3
4
6
13 14
11
12
5
910
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A Symbol: Read the instruction manual!1 Mains switch2 Ventilation grid front (suction side)3 Connection hose 1.5 m long4 Evaporator coil (cooling coil)
made from stainless steel 18/85 Mains cable6 Ventilation grid rear (air exhaust)9 Name plate10 Fuses (if this fuse is triggered, see chap. 11.4)11 Temperature controller with display (see 7.3)12 Socket for Pt100 sensor13 Fault monitoring lamp14 Reset key
Functional and Operating Elements
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7.3 Temperature controller
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15 16
15 Temperature display(Preset value setting and parameter display)
16 SET key for activating setting functions
17 Up and down key(for increasing and reducing values)
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Mounting Special Accessory (only for EK45)
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8. Mounting Special Accessory (only for EK45)
8.1 Fitting the evaporator in the optional clampingbracket
1 Slide themetal plates supplied with the bracket into theslot above the evaporator coil.
2 Insert the cooling element through the rectangularopening.
3 Attach the inserted plates using four screws.
Do not kink the evaporator hose!
EK90
EK45
40..110
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Installation
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9. Installation
The evaporator tube and coil should never besharply bent nor formed to a small radius!
Evaporator hose -- smallest permissible bending ra-dius: 125 mm.
Evaporator coil (cooling coil) -- smallest permissiblebending radius for the EK90:bending once: 40 mmbending often: 110 mm
Damage caused by an excessive bending of thecoiling coil is not covered by our warranty regula-tions.
9.1 Cooling of liquid baths
• Immerse total length of evaporator coil 4 into the bathliquid!
• Ensure safe mounting in bath vessel for open-bath cir-culators with a large opening!(for suitable holders, refer to Thermo Haake circulatoraccessories)
• In open-bath or immersion circulators with swivelledpump jet nozzles, it should be guaranteed that they areadjusted so that a thoroughmixing of the liquid will takeplace in the vicinity of the evaporator coil 4.
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Bath Liquids
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10. Bath Liquids
Immerse the cooling coil (evaporator) of the cooler into asuitable bath vessel. The coil must be completely coveredwith liquid otherwise ice will form.
The selection of the proper bath liquid (heat transfer liquid)influences the capacity of a cooler decisively.The temperature accuracy will decrease the higher viscosityof the heat transfer liquid and the lower its heating capacityis.
--30 to 40°C Water with Antifreeze
The amount of antifreeze added should cover a temperaturerange 10°C lower than the operating temperature of the par-ticular application. This will prevent the water from gelling(freezing) in the area of the evaporating coil the surface areaof which is much colder than the working temperature. Anexcess of antifreeze deteriorates the temperature constancydue to its high viscosity.
--70 to 40°C SIL 180
This liquid is very stable in the long term. Due to the high vis-cosity at low temperatures, the usage of a stirrer is to be rec-ommended.
--50 to 40°C Synth 60
or
--90 to --30°C Synth 20
Synthetic heat transfer liquids which are however hygroscopicand thus require changing more frequently than usual.
Please get in contact with us should you have any questions.We are glad to advise you and can help you to choose a heattransfer liquid suitable for your applicationThermo Haake heat transfer liquids are supplied with an ECSafety Data Sheet.
The highest working temperature as defined by the EN61010 (IEC 1010) must be limited to 25°C below theflashpoint of the bath liquid.
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Bath Liquids
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Please ensure when selecting the heat transfer liquidthat no toxic gases can be generated and bear in mindthat inflammable gases can build up over the liquid dur-ing usage.
If water alone or water with a small amount of antifreezeis used as the bath liquid, a thick ice coating can formon the evaporator.This leads to a clearly reduced cooling capacity of theimmersion cooler.
Remove the ice coating by heating up if necessary. Donot remove the ice coating mechanically!
230 V
115 V
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Pin configuration Pt100:
Ω
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Connecting Up
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11. Connecting Up
11.1 Connecting to the mains
Only attach this unit to mains sockets with a grounded earth.Compare the local mains voltage with the specifications writ-ten on the name plate. Voltage deviations of +/- 10% are per-missible. The socket must be rated as suitable for the totalpower consumption of the unit.
11.2 Connecting a sensor
The temperature sensor supplied should be inserted intosocket 12.Any commercially available Pt100 sensor can be usedinstead of this sensor. A suitable plug is available fromThemo Haake under the order no. 087-2432.
11.3 Changing the mains plug (e.g. for Great Britain)
This should only be carried out by qualified spe-cialist personnel!
The mains cable wires have the following colors:Brown = LiveBlue = NeutralGreen/Yellow = Earth
11.4 Fuses on the unit
All units are equipped with automatic thermally-triggeredfuses. If the fuse has triggered…
• the fuse does not have to be exchanged -- resetting suf-fices;
• a red marking is visible;• a certain cooling down time should be allowed (approx.
5 min) before the (dip) switch can be pressed again.Donot use tools; donot use force.Bothdestroy thefuse.If the fuse shouldbe triggered again after resetting,the unit probably has a defect. In this case the unitshould be sent in for servicing.
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15
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Operating
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12. Operating
1 Ensure that the evaporator is completely covered withliquid.
2 Switch the unit on via the mains switch 1.
If the cooler has already been in use, please wait atleast 3 minutes for the EK45 (10 minutes for theEK90) after switching off before switching onagain. If the unit is switched on before this timehaselapsed, the compressor attempts to start up sev-eral times without success. In this case the wind-ings of the compressor motor are in danger ofburning through.
The second compressor of the EK90 is always automaticallyswitched on with a delay of 30 seconds.This is carried out to protect the compressor.
When the unit is started under unfavourable envi-ronmental conditions, the pressostat safety devicemay respond after about 1 minute. If this happens,please press the reset button 14.Usually the unit will then start correctly withoutgoing into fault status again. However, if fault sta-tus appears several times in succession, the unit isdefective and must be sent in for servicing.
If the unit shows one of the followingmessages at the display15, please see chapter 13:
or .
12.1 Displaying the actual temperature
The actual temperature (temperature of the control sensor)is displayed at the red LED display 15 in the normal mode.
After any settings have been made, the display automati-cally switches back to actual temperature display.
15 16 17
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Operating
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12.2 Setting the desired set temperature
If no entry is made within 3 seconds the value shown inthe display 15 switches automatically back to the actualtemperature and the previously selected set value au-tomatically remains stored.
1 Depress the SET key 18 briefly
⇒ The last stored set value is displayed
2 Hold pushed the SET key 18 for 2 sec.
3 Select the new set value using the Up 16 andDown 17 keys
4 Tomemorise the new set point value push the SET keyagain:⇒ The new set value is displayed
Press SETto store thenew value
Normal display (actual value)
Set value level display value
Change value
15
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Faults
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13. Faults
13.1 Messages shown on the display 15
“PFo” No sensor is connected orthe connected sensor is broken.
The unit cools down to the lowest possibletemperature.
“PFc” The connected sensor has a short circuit.
The unit cools down to the lowest possibletemperature.
13.2 Faults with the HAAKE EK45
The compressor is automatically switched off by the safetysystem in case of it being thermally overloaded. The com-pressor switches itself back on again automatically after ithas cooled down.
Possible reasons for the compressor switching itself off:
• the ambient temperature is too high
• the air quantity for cooling is insufficient
• The liquefier fins are too heavily contaminated
• The ventilator motor has a defect
Please therefore ensure that,
• the permissible maximum ambient temperature of40_C is not exceeded,
• the necessary cooling air quantity can circulate unhin-dered (do not set up the unit directly against a wall).The cooling air flow rate can be very easily checked:A sheet of paper should remain “stuck” to the ventilatorgrid 2 (suction side) when the cooler is in use.
If the fault cannot be remedied then…
• clean the liquefier (see chapter 15)
or
• have the unit checked by qualified service personnel
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14
PT100
Faults
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13.3 Faults with the HAAKE EK90:
If one of the following faults occurs, the fault control lamp 13lights up and the unit is switched off:
• the ambient temperature is too high
• the air quantity for cooling is insufficient
• the liquefier fins are too heavily contaminated
• the ventilator motor has a defect
• refrigerant leakage in the 1st stage of the cooling cir-cuit.
Please therefore ensure that,
• the permissible maximum ambient temperature of40_C is not exceeded,
• the necessary cooling air quantity can circulate unhin-dered (do not set up the unit directly against a wall).The cooling air flow rate can be very easily checked:A sheet of paper should remain “stuck” to the ventilatorgrid 2 (suction side) when the cooler is in use.
If the fault cannot be remedied then…
• clean the liquefier (see chapter 15)or
• have the unit checked by qualified service personnel
After the fault has been eliminated:
After the fault has been eliminated, the RESET key 14mustbe pressed in order to start up the unit again.
15 16 17
18
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Checking the Parameters
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14. Checking the ParametersThe default parameter are adjusted. No alterationsare necessary!
Don’t touch the keys on the control panel for 30 se-conds after switching it on!
To change the set value
see chapter 12.2
Parameter list “PR1”
Press “SET” key 18 and arrow key 16 together for 3 sec.:
⇒ “PR1” appears in announcement;this level contains all parameter attainable for theuser.
Use “UP” 16 or “DOWN” 17 to change its value.
Press “SET” to store the new value andmove to the followingparameter.
Calibration
Select the code “OPb” (Probe calibration). The adjustmentdepends on the measuring range.
If you get to the programming level ”PR2” (by pressingthe wrong key) and ”PAS” appears on the display, sim-ply press the SET key 18, then hold down the SET keyand arrow key 16 together:
⇒ the actual temperature appears on the display;the factory setting of the parameters is still effec-tive.
How to lock the keybord
Keep pressed for more than 3 sec. the arrows 16 and 17.
The “POF” message willbe displayed and the keyboard willbe locked. At this point it will be possible only to see the setpoint or the max. o min. temperature stored.
If a key is pressed more than 3 s the “POF” message will bedisplayed.
To unlock the keyboard
Keep pressed together for more than 3 s the arrows 16 and17, till the “PON” message will be displayed.
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Maintenance
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15. MaintenanceThe stainless steel surfacesmay after some time showspotsand become tarnished. Normal stainless steel cleaners asthey are used in the kitchen can be used. Vinegar-basedcleaners have proved to be suitable used according to themanufacturers recommendations.
Do not use scouring powder!
The evaporation coil must be kept clean in order to ensurea long service life. Substances containing acidic or alkalinesubstances and metal shavings should be removed quicklyas they could harm the surfaces causing corrosion. If corro-sion (e.g. small rust marks) should occur in spite of this,cleaning with stainless steel caustic agents has proved to besuitable. These substances should be applied according tothe manufacturers recommendations.
15.1 Cleaning the fins of the liquefier
In order to maintain the cooling capacity of the unit, cleaninghas to be done two to four times per year, depending on thegrade of soiling.
Switch off unit and pull out the plug.For the EK45:
1 Clean the fins with compressed air.For extreme soiling, seek the help of specialist servicepersonnel.
For the EK90:
1 Loosen ventilation grid 2: Rotate the mounting screws90° in any direction and remove grid.
2 Clean fins with brush or similar tool.
3 Replace grid and push screws back in (do not rotatescrews).
15.2 Discarding the unit:
One day the life span of your cooling unit will end.Therefore:
This unit contains ozone-friendly coolant R404aand R23. The unit may however only be discardedby authorized personnel.
Accessories / Technical Specifications
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16. Accessories / Technical Specifications
SpecialAccessories OrderNo.
Screw attachment for fixing the EK45 tobath walls up to a thickness of 25 mm 333--0452
Set of castors for the EK90 333--0508
Technical Specs. acc. to DIN58966 EK45 EK90
Working temp. range °C --45..40 --90..40Cooling cap. at 20°C W 350 300
at --10°C W 250 280at --40°C W 170at --60°C W 100
Compressor cooling air airRefrigerant R404A R404A/R23Cooling circuit 1 stage 2 stageHose length cm 150 150Cooling coil dimensions(∅xL) mm 81x195 13x900Smallest bending radius mm -- 40Evaporator material st. steel st. steelDimensions (WxD) mm 225x465 380x460Unit height (H) mm 380 490Weight kg 24,5 60Permissible ambient temperature°C 10..40 10..40Total wattage max. VA 1840 2760
Order No. for 230 V / 50-60 Hz 328-1451 329-1901for 115 V / 60 Hz 328-1452 ---- --
16.1 Fuse values
Unittype
Mains voltage Fuse(s) at therear panel
Fuse(s)in the unit
EK45 230V 2x8 A 1xT32 mA115V 1x15 A 1xT32 mA
EK90 230V/50--60Hz 2x12 A 1xT630 mA200V/50--60Hz 2x12 A 1xT630 mA
Part no. 002--8856 ASubject to alterations Printed in Germany 1.1.040.2--05.04