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Lauda RA 12, Operating Instructions Manual, Page: 34 / 52

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Lauda RA 12 Operating Instructions Manual Download Page 34

 

 

 

34 / 52 

Alpha 

7/2022 

 

 

8

 

Maintenance 

8.1

 

Cleaning 

 

 

Before cleaning the unit, pull out the mains plug! 

The unit can be cleaned with water adding a few drops of detergent (washing up liquid), using a moist cloth. 

 

 

Water/ heat transfer liquid must not enter the control unit! 

 

 

Carry out appropriate detoxification if dangerous material has been spilled on or inside the unit. 

 

Method of cleaning and detoxification are decided by the special knowledge of the user. In case of 
doubt please contact the manufacturer. 

8.2

 

Maintenance 

 

 

Before any maintenance and repair work pull out the mains plug! 

 

Repairs on the control unit must only be carried out by properly qualified personnel! 

If the heat transfer liquid becomes contaminated, it has to be replaced.  

8.2.1

 

Service intervals 

System part 

Frequency 

Comment 

 

Each time of putting into operation and then   

Complete device 

 

 

External condition of the device 

Monthly 

 

Heat transfer liquid 

 

 

Test of the heat transfer liquid 

(

 8.2.2) 

 

Heat transfer system 

 

 

Sealing 

Daily 

External visual inspection 

External hoses 

 

 

Material fatigue 

Monthly 

External visual inspection 

Cooling unit 

 

 

Condenser cleaning 

(

 8.2.3)  

Cooling thermostat 

Electronics 

 

 

Over temperature protection 

(

 7.11.3) 

 

Low level protection testing 

(

 7.11.3) 

 

Summary of Contents for RA 12

Page 1: ...Operating instructions Alpha Immersion Thermostat A Heating Thermostats A 6 A 12 A 24 Cooling Thermostats RA 8 RA 12 RA 24 Read the instructions prior to performing any task...

Page 2: ...1 97922 Lauda K nigshofen Germany Telephone 49 0 9343 503 0 Fax 49 0 9343 503 222 E mail info lauda de Internet http www lauda de Q4WA E_13 004 EN English Translation of the original operating instru...

Page 3: ...t sufficient water or heat transfer liquid level Do not start up the equipment if it is damaged or leaking the supply cable is damaged Switch off the equipment and pull out the mains plug for servicin...

Page 4: ...SETTING UP 18 6 2 FILLING AND EMPTYING 21 6 3 HEAT TRANSFER LIQUIDS AND HOSES 22 6 4 CONNECTION OF EXTERNAL CIRCUITS 24 7 STARTING UP 25 7 1 CONNECTION TO THE SUPPLY 25 7 2 SWITCHING ON 25 7 3 GENERAL...

Page 5: ...L INFORMATION 35 8 4 1 Disposal of refrigerant 35 8 4 2 Disposal of packaging 35 8 5 ORDERING SPARES AND RATING LABEL 36 9 ACCESSORIES 37 10 TECHNICAL DATA AND DIAGRAMS 39 11 DECLARATION OF CONFORMITY...

Page 6: ...61326 1 Emissions Class B in accordance with CISPR 11 Only for EU Domestic connection value 100 A Table 1 in accordance with DIN EN 61326 1 Emissions Class B in accordance with CISPR 11 Rest of the wo...

Page 7: ...lation thermostat failure of hoses may lead to leaking of hot heat transfer liquid and become a danger to personnel and objects When no external consumer is connected to the thermostat the pump outflo...

Page 8: ...ooling thermostats Fill the bath with proper glycol water mixture 6 3 The units are designed only for operation with non flammable liquids to DIN EN 61010 2 010 Take care of the level of the heat tran...

Page 9: ...e status Standby Activate timer by setting the Auto Shut Down Delay hh mm with or Deactivate timer by setting 00 00 The setting is accepted only by pressing the key Bath temperature 2 3 Display flashe...

Page 10: ...ller with four segment LED display 2 Heater active yellow LED is lit Cooler active blue LED is lit Error signal red LED is flashing 3 Menu functions select and Enter keys 4 Mains switch 5 Screw clamp...

Page 11: ...7 2022 Alpha 11 52 1 Reset button press only if the display shows SAFE 2 Cooler cable 3 Rating label 4 Mains cable 5 Screw clamp 1 2 3 4 5...

Page 12: ...12 52 Alpha 7 2022 1 Control head with clamp 2 Bath vessel 3 Four mounting feet 1 2 3...

Page 13: ...52 Alpha Cooling Thermostat 1 Control head 2 Pump connections return to bath and pump outflow 3 Bath cover 4 Handle on front and back 5 Removable front cover 6 Grille on both sides 7 Four mounting fee...

Page 14: ...14 52 Alpha 7 2022 1 Mains cable 2 Rating label 3 Cooler cable 4 Bath drain nozzle 1 2 3 4...

Page 15: ...trol head and the type of bath or the refrigeration system respectively Examples RA 8 Immersion thermostat Alpha control head and refrigeration system with bath of 8 liters maximum volume A 12 Control...

Page 16: ...ment Further measurement conditioning occurs using a special control algorithm for controlling the heater actuator and the refrigeration system 4 7 Refrigeration system The refrigeration system consis...

Page 17: ...be examined Please also inform the LAUDA Service 8 5 Standard accessories Catalogue No Quantity Designation Q4WA E_13 004 EN 1x Operating instructions for all thermostats UD 425 1x Screw clamp for imm...

Page 18: ...In small baths use the pressure reducer to pre vent any splashing of heat transfer liquid Immersion Heating thermostats only Fix the clamp at the bottom of the control head by two screws M4 x 6 A3 1 4...

Page 19: ...the mains plug immediately Cooling thermostats only NEVER overturn the unit and never put it upside down After transport and before starting up store it standing in upright position for two hours if p...

Page 20: ...operated safely up to an ambient temperature of 40 C Depending on the loading of the refrigeration system a temporary shut off can occur especially in case of an ambient temperature of over 35 C Addit...

Page 21: ...off the thermostat pull out the mains plug Drain the heat transfer liquid through the drain nozzle using a flexible tube The units are designed for operation with non flammable liquids to DIN EN 61010...

Page 22: ...danger of corrosion Water content falls after prolonged operation at higher temperatures mixture becomes flammable flash point 119 C check the mixture ratio with a dosimeter Safety data sheets are av...

Page 23: ...ZB 120 LZB 220 or LZB 320 or with Kryo 30 6 3 There is a risk of electrochemical oxidation with the use of racks of non ferrous metals or non ferrous metal samples The LAUDA Alpha thermostat tanks are...

Page 24: ...ections with largest inner diameter as possible This gives the best flow Connect 9 mm internal diameter tubing from your applica tion to the pump connections Pump connections return to bath pump outfl...

Page 25: ...exceed those currents distinctly for a short time Ensure that the unit is filled in accordance with Section 6 2 Note for electric installation on site The devices must be protected with a 16 ampere ci...

Page 26: ...ounting position to the left Keys are pressed and held down Moves counting position to the right Switching one place to the right occurs by briefly 1 second releasing the key followed by another press...

Page 27: ...and Lo are not accepted A buzzer signal appears If necessary first change the temperature limits 7 6 7 5 Automatic Shutdown Timer ASd The automatic Shutdown Timer can be activated deactivated read out...

Page 28: ...ng the key Enter the selection The maximum temperature can be set from 35 C to 105 C The minimum temperature can be set from 30 C to 30 C The current temperature limit value is displayed flashing or S...

Page 29: ...certificate Only offset values of 5 Kelvin are accepted Switching on the unit the last used CAL value is preloaded again 5x to CAL and 1x longer than 3 seconds Call the option CAL or Display flashes...

Page 30: ...warnings or errors as appropriate All warnings alarms or errors are shown on the LED display Alarms Alarms are safety relevant Components Pump Heater Refrigerating Unit will be shut down Errors When...

Page 31: ...l protection testing Every 6 month or before the unit is running unattended for longer periods this protection should be tested Therefore Remove the heat transfer liquid of the thermostat 6 2 Turn on...

Page 32: ...mp 1 Alarm sounds as dual tone signal for pump motor overload or blockage 2 Display of PuPsignals blockage 3 The red LED above the fault triangle flashes Heater switches off on both poles Pump and ref...

Page 33: ...erature minimum temperature 7 6 Errors Message on display Meaning E001 Sensor Issue short E002 Sensor Issue open unexpected sensor value If there is any irregularity when testing the safety devices sw...

Page 34: ...ce Before any maintenance and repair work pull out the mains plug Repairs on the control unit must only be carried out by properly qualified personnel If the heat transfer liquid becomes contaminated...

Page 35: ...This is done after taking off the front grille Brush off the condenser and if necessary blow through with compressed air 8 3 Note on repair If you need to send in a unit for repair it is essential to...

Page 36: ...owing cases In the event of faults on the machine For spare part orders In the case of questions about the machine Contact our Sales Department for application specific questions LAUDA Service Phone 4...

Page 37: ...m PP white 250 mm x 100 mm x 65 mm 0 135 C two racks fit in each of RA 12 three racks fit in each of A 24 and RA 24 UE 037 Rack for 60 tubes d 16 mm PP white 250 mm x 100 mm x 65 mm 0 135 C two racks...

Page 38: ...llow 250 mm x 100 mm x 65 mm 0 135 C two racks fit in each of RA 12 three racks fit in each of A 24 and RA 24 UE 045 Rack for 24 tubes d 25 mm PP yellow 250 mm x 100 mm x 65 mm 0 135 C two racks fit i...

Page 39: ...Temperature stability at 37 C K 0 05 Display setting resolution C 0 1 Pump type number of pump steps Pressure pump 1 Connections for consumers accessory Hose nozzle 12 7 mm external diameter Heater po...

Page 40: ...up to 50 Connections for cooling coil accessory Hose nozzle 11 7 mm external diameter Overall dimensions W x D x H mm 125 x 150 x 300 Weight kg 3 5 Ingress protection rating IP Code according to IEC 6...

Page 41: ...Bath vessel Inner tank in stainless steel Housing Powder coated steel sheet Feet Four mounting feet Bath opening W x D with Head mm 145 x 161 235 x 161 295 x 374 165 x 177 300 x 203 350 x 277 Bath op...

Page 42: ...50 60 Hz kW 1 0 1 0 1 0 1 3 1 3 1 3 Refrigerant and filling quantity The cooling thermostat contains fluorinated greenhouse gases Units RA 8 RA 12 RA 24 Refrigerant R 134a R 134a R 134a maximum fillin...

Page 43: ...7 2022 Alpha 43 52 Pump characteristics Alpha Immersion Thermostat measured with water Heating up curves from Alpha A 6 A 12 and A 24 230 V 230 V...

Page 44: ...44 52 Alpha 7 2022 Cooling characteristics Alpha RA 8 RA 12 and RA 24 230 V 230 V...

Page 45: ...7 2022 Alpha 45 52 11 Declaration of Conformity and Product Returns...

Page 46: ...46 52 Alpha 7 2022...

Page 47: ...7 2022 Alpha 47 52...

Page 48: ...m of excerpts and the utilization and or conveyance of its content are not allowed except for internal purposes without written approval from the manufacturer Violation of this may obligate the violat...

Page 49: ...Warnings 33 Filling quantity 42 G GWP 42 H Heat transfer liquid Testing 35 Hi 28 K Key functions 26 L LED signals 26 Lo 28 Low level protection 31 Low level Protection testing 31 M Maintenance 34 O O...

Page 50: ...50 52 Alpha 7 2022 Standby 30 StbY 30 T Temperature Limit temperature 28 maximum temperature 28 minimum temperature 28 U UK plugs 25 W Warnings 30...

Page 51: ......

Page 52: ...LAUDA DR R WOBSER GMBH CO KG Laudaplatz 1 97922 Lauda K nigshofen Telephone 49 0 9343 503 0 Fax 49 0 9343 503 222 E mail info lauda de Internet https www lauda de...

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