Buchi Rotavapor R-250 Pro User manual

Rotavapor® R-250 Pro
Operation Manual
11594225 | A en

Imprint
Product Identification:
Operation Manual (Original) Rotavapor® R-250 Pro
11594225
Publication date: 05.2021
Version A
BÜCHI Labortechnik AG
Meierseggstrasse 40
Postfach
CH-9230 Flawil 1
E-Mail: [email protected]
BUCHI reserves the right to make changes to the manual as deemed necessary in the light of experience,
especially with respect to structure, illustrations and technical details.
This manual is copyrighted. Information from it may neither be reproduced, distributed, or used for
competitive purposes, nor made available to third parties. The manufacture of any component with the
aid of this manual without prior written agreement is also prohibited.

Büchi Labortechnik AG Table of contents
Operation Manual Rotavapor® R-250 Pro iii
Table of contents
1 About this document...........................................................................................................6
1.1 Mark-ups and symbols ..........................................................................................................6
1.2 Trademarks ...........................................................................................................................6
1.3 Connected devices ................................................................................................................6
2 Safety....................................................................................................................................7
2.1 Proper use .............................................................................................................................7
2.2 Use other than intended ........................................................................................................7
2.3 Staff qualification ...................................................................................................................7
2.4 Personal protective equipment ..............................................................................................8
2.5 Warning notices in this document..........................................................................................8
2.6 Warning symbols ...................................................................................................................9
2.7 Residual risks ........................................................................................................................9
2.7.1 Dangerous vapors ....................................................................................................10
2.7.2 High internal pressure...............................................................................................10
2.7.3 Hot surfaces and liquids ...........................................................................................10
2.7.4 Rotating parts ...........................................................................................................10
2.7.5 Faults during operation .............................................................................................10
2.7.6 Glass breakage.........................................................................................................10
2.8 Modifications........................................................................................................................11
3 Product description...........................................................................................................12
3.1 Description of function .........................................................................................................12
3.2 Configuration .......................................................................................................................13
3.2.1 Front view .................................................................................................................13
3.2.2 Rear view..................................................................................................................14
3.2.3 Connections on the rear side....................................................................................15
3.3 Scope of delivery .................................................................................................................16
3.4 Type plate............................................................................................................................16
3.5 Technical data .....................................................................................................................17
3.5.1 Rotavapor® R-250Pro ..............................................................................................17
3.5.2 Ambient conditions ...................................................................................................18
3.5.3 Materials ...................................................................................................................18
3.5.4 Installation site ..........................................................................................................18
4 Transport and storage ......................................................................................................19
4.1 Storage ................................................................................................................................19
4.2 Transport .............................................................................................................................19
4.3 Moving the instrument .........................................................................................................19
4.4 Installing and removing the transportation lock ...................................................................19

Table of contents Büchi Labortechnik AG
iv Operation Manual Rotavapor® R-250 Pro
5 Installation..........................................................................................................................21
5.1 Before installation ................................................................................................................21
5.2 Establishing electrical connections......................................................................................21
5.3 Installing the support rod .....................................................................................................21
5.4 Installing the glassware .......................................................................................................22
5.4.1 Glassware assembling instructions ..........................................................................22
5.4.2 Installing the inlet valve (example)............................................................................24
5.4.3 Installing the distribution piece (example).................................................................24
5.4.4 Installing the glass assembly R (option) ...................................................................25
5.4.5 Installing the glass assembly D (option) ...................................................................26
5.4.6 Installing the double receiver ....................................................................................27
5.4.7 Installing the single receiver (option) ........................................................................28
5.4.8 Connecting the receiver with the glass assembly (example)....................................28
5.5 Installing the vacuum supply ...............................................................................................29
5.5.1 Installing the vacuum pump holder (option)..............................................................29
5.5.2 Installing a BUCHI vacuum pump (option)................................................................29
5.5.3 Installing a non BUCHI vacuum pump (option).........................................................30
5.5.4 Installing the vacuum connection glass assembly R (option) ...................................30
5.5.5 Installing the vacuum connection glass assembly D (option) ...................................32
5.6 Installing the cooling water supply.......................................................................................33
5.6.1 Installing the cooling water supply with a recirculating chiller (option)......................33
5.6.2 Installing the cooling water supply without a recirculating chiller (option).................34
5.7 Heating bath installations ....................................................................................................35
5.7.1 Installing the splash protection (option) ....................................................................35
5.7.2 Installing the heating bath replenishment (option) ....................................................36
5.7.3 Installing the drain connection at the heating bath ...................................................36
5.7.4 Setting the heating bath reaction during a power interruption ..................................36
5.8 Installing the sensors...........................................................................................................37
5.8.1 Installing the vapor temperature sensor ...................................................................37
5.8.2 Installing the cooling temperature sensor (option)....................................................37
5.8.3 Installing the foam sensor (option)............................................................................38
5.8.4 Installing the cooling water flow sensor (option) .......................................................38
5.8.5 Installing the level sensor (option) ............................................................................39
5.8.6 Setting up the sensors ..............................................................................................39
5.9 Preparing the instrument for remote control (option)........................................................... 40
6 Layout of the interface ......................................................................................................42
7 Preparing for an evaporation ...........................................................................................43
7.1 Installing and removing the evaporation flask ..................................................................... 43
7.2 Operating the inlet valve......................................................................................................44
7.3 Preparing the heating bath ..................................................................................................44
7.4 Draining distillate .................................................................................................................45
7.5 Operating the splash protection...........................................................................................45
8 Carrying out an evaporation.............................................................................................47
8.1 Preparing the instrument .....................................................................................................47
8.2 Starting an evaporation .......................................................................................................47
8.3 Task during an evaporation ................................................................................................. 47
8.4 Ending an evaporation.........................................................................................................47
8.5 Shutting down the instrument .............................................................................................. 48

Büchi Labortechnik AG Table of contents
Operation Manual Rotavapor® R-250 Pro v
9 Cleaning and servicing .....................................................................................................49
9.1 Regular maintenance work..................................................................................................49
9.2 Replacing the vacuum seal .................................................................................................49
9.3 Replacing the evaporation flask seal...................................................................................50
9.4 Installing the vapor duct.......................................................................................................50
9.5 Setting max. heating bath temperature ...............................................................................51
10 Help with faults ..................................................................................................................52
10.1 Troubleshooting...................................................................................................................52
10.2 Error messages ...................................................................................................................52
10.3 Resetting the overtemperature protection ...........................................................................56
10.4 Replacing the inlet valve plunger.........................................................................................56
10.5 Adjusting the cooling water flow sensor .............................................................................. 57
10.6 Adjusting the level sensor....................................................................................................57
10.7 Adjusting the foam sensor ...................................................................................................57
11 Taking out of service and disposal..................................................................................59
11.1 Taking out of service ...........................................................................................................59
11.2 Disposal...............................................................................................................................59
11.3 Returning the instrument .....................................................................................................59
12 Appendix ............................................................................................................................60
12.1 Schematics ..........................................................................................................................60
12.1.1 Vacuum.....................................................................................................................60
12.1.2 Cooling water circuit .................................................................................................60
12.2 Spare parts and accessories ...............................................................................................61
12.2.1 Spare parts glass ware .............................................................................................61
12.2.2 Further spare parts ...................................................................................................72
12.2.3 Inlet valve..................................................................................................................73
12.2.4 Accessories ..............................................................................................................74
12.2.5 Hoses........................................................................................................................76
12.2.6 Gear box ...................................................................................................................77

1 | About this document Büchi Labortechnik AG
6/78 Operation Manual Rotavapor® R-250 Pro
1 About this document
This operation manual is applicable for all variants of the instrument.
Read this operation manual before operating the instrument and follow the
instructions to ensure safe and trouble-free operation.
Keep this operation manual for later use and pass it on to any subsequent user or
owner.
BÜCHI Labortechnik AG accepts no liability for damage, faults and malfunctions
resulting from not following this operation manual.
If you have any questions after reading this operation manual:
uContact BÜCHI Labortechnik AG Customer Service.
https://www.buchi.com/contact
1.1 Mark-ups and symbols
NOTE
This symbol draws attention to useful and important information.
RThis character draws attention to a requirement that must be met before the
instructions below are carried out.
uThis character indicates an instruction that must be carried out by the user.
ðThis character indicates the result of a correctly carried out instruction.
Mark-up Explanation
Window
Software Windows are marked-up like this.
Tab
Tabs are marked-up like this.
Dialog
Dialogs are marked-up like this.
[Button] Buttons are marked-up like this.
[Field names] Field names are marked-up like this.
[Menu / Menu item] Menus or menu items are marked-up like this.
Status Status is marked-up like this.
Signal Signals are marked-up like this.
1.2 Trademarks
Product names and registered or unregistered trademarks that are used in this
document are used only for identification and remain the property of the owner in
each case.
1.3 Connected devices
In addition to these operating instructions, follow the instructions and specifications
in the documentation for the connected devices.

Büchi Labortechnik AG Safety | 2
Operation Manual Rotavapor® R-250 Pro 7/78
2 Safety
2.1 Proper use
The instrument is designed for rotary evaporation.
The instrument can be used in laboratories and production for the following tasks:
Evaporating solvents
Synthesis of chemicals
Purification of chemicals
Concentration of solvents
Recycling of solvents
Recrystallization
Drying of powders and granulates
2.2 Use other than intended
The use of the instrument other than described in proper use and specified in
technical data is use other than intended.
The operator is responsible for damages or hazards that are caused by use other
than intended.
Specially the following uses are not permitted:
Use of the instrument in areas which require explosion-safe instruments.
Use of the instrument for processing substances in the food, animal feed or
cosmetics industries.
Use of samples, which can explode or inflame (example: explosives, etc.) due to
shock, friction, heat or spark formation.
Use of the instrument with solvents containing peroxides.
Use of the instrument in overpressure situations.
Use of the instrument with other than original BUCHI glassware.
Use of the instrument with explosive gas mixtures.
The use of the instrument for drying hard, brittle substances that could damage
the glassware.
Use of the instrument with a heating medium with a flash point less than 200 °C.
2.3 Staff qualification
Unqualified persons are unable to identify risks and are therefore exposed to greater
dangers.
The device may only be operated by suitably qualified laboratory staff.
These operating instructions are aimed at the following target groups:

2 | Safety Büchi Labortechnik AG
8/78 Operation Manual Rotavapor® R-250 Pro
Users
Users are persons that meet the following criteria:
They have been instructed in the use of the device.
They are familiar with the contents of these operating instructions and the
applicable safety regulations and apply them.
They are able on the basis of their training or professional experience to assess
the risks associated with the use of the device.
Operator
The operator (generally the laboratory manager) is responsible for the following
aspects:
The device must be correctly installed, commissioned, operated and serviced.
Only suitably qualified staff may be assigned the task of performing the
operations described in these operating instructions.
The staff must comply with the local applicable requirements and regulations for
safe and hazard-conscious working practices.
Safety-related incidents that occur while using the device should be reported to
the manufacturer ([email protected]).
BUCHI service technicians
Service technicians authorized by BUCHI have attended special training courses and
are authorized by BÜCHI Labortechnik AG to carry out special servicing and repair
measures.
2.4 Personal protective equipment
Depending on the application, hazards due to heat and/or corrosive chemicals may
arise.
uAlways wear appropriate personal protective equipment such as safety goggles,
protective clothing and gloves.
uMake sure that the personal protective equipment meets the requirements of
the safety data sheets for all chemicals used.
2.5 Warning notices in this document
Warning notices warn you of dangers that can occur when handling the device.
There are four danger levels, each identifiable by the signal word used.
Signal word Meaning
DANGER Indicates a danger with a high level of risk which could result in
death or serious injury if not prevented.
WARNING Indicates a danger with a medium level of risk which could result in
death or serious injury if not prevented.
CAUTION Indicates a danger with a low level of risk which could result in mi-
nor or medium-severity injury if not prevented.
NOTICE Indicates a danger that could result in damage to property.

Büchi Labortechnik AG Safety | 2
Operation Manual Rotavapor® R-250 Pro 9/78
2.6 Warning symbols
The following warning symbols are displayed in this operation manual or on the
instrument.
Symbol Meaning
General warning
Device damage
Dangerous electrical voltage
Hot surface
Hand injuries
Fig.1: Location of the warning symbols on the instrument
2.7 Residual risks
The device has been developed and manufactured using the latest technological
advances. Nevertheless, risks to persons, property or the environment can arise if
the device is used incorrectly.
Appropriate warnings in this manual serve to alert the user to these residual
dangers.

2 | Safety Büchi Labortechnik AG
10/78 Operation Manual Rotavapor® R-250 Pro
2.7.1 Dangerous vapors
Distillation can produce dangerous vapors that are capable of causing life-
threatening toxic effects.
uDo not inhale any vapors produced during distillation.
uEnsure that vapors are removed by a suitable fume hood.
uOnly use the device in well ventilated areas.
uIf vapors escape from joints or connections, check the seals concerned and
replace them if necessary.
uDo not distill any unknown fluids.
uObserve the safety data sheets for all fluids used.
2.7.2 High internal pressure
The evaporation of fluids can produce high pressures inside the flask or the
condenser. If that pressure becomes too great, the glass components could explode.
uMake sure that the internal pressure inside the glass components is never greater
than atmospheric pressure.
uWhen distilling without a vacuum, set the vacuum pump to atmospheric pressure
so that excess pressure is automatically dissipated.
uIf a vacuum pump is not used, leave the vacuum connection open.
2.7.3 Hot surfaces and liquids
The heating bath, evaporating flask and parts of the condenser can become very hot.
If touched they can cause skin burns.
uDo not touch hot surfaces or liquids or else wear suitable protective gloves.
2.7.4 Rotating parts
The evaporating flask and the vapor duct are rotated by the rotary drive unit. Hair,
clothing or jewelry can become caught up if allowed to come into contact with the
rotating parts.
At high speeds, the heating fluid may be sprayed out by the rotation of the
evaporating flask.
uWear work overalls or protective clothing.
uDo not wear loose or baggy items of clothing such as scarves or neck-ties.
uTie up long hair.
uDo not wear jewelry such as necklaces or bracelets.
uAt high speeds and/or high temperatures, use the optional safety guard or a
similar protective arrangement.
2.7.5 Faults during operation
If a device is damaged, sharp edges, moving parts or exposed electrical wires can
cause injuries.
uRegularly check device for visible damage.
uIf faults occur, switch off the device immediately, unplug the power cord and
inform the operator.
uDo not continue to use devices that are damaged.
2.7.6 Glass breakage
Broken glass can cause severe cuts.