Buchi Rotavapor R-220 User manual

1
BÜCHI Rotavapor R-220 Table of Contents
Table of Contents
en, Version F (46 Pages) Ordering No.
R-220 Operation Manual 96737
Read this Operating Manual through carefully before using
the Büchi Rotavapor R-220. Always keep these Instructions
readily available in the immediate vicinity of the unit so that
they make be consulted at any time.
Chapter 2 contains important safety rules which must be ob-
served to ensure the safe operation of the rotary evaporator.
We reserve the right to make technical changes without
prior notification. No portion of this Operating Manual
may be reproduced, processed using electronic or optical
systems, duplicated, or distributed in any form without
the prior written approval of Büchi Labortechnik AG.
All rights reserved. © Büchi Labortechnik AG, 1999-2001
6 Maintenance 23
6.1 Taking Apart the Snap Flange Coupling 23
6.2 Assembling the Snap Flange Coupling 24
6.3 Removing the Evaporating Flask Seal 24
6.4 Inserting the Evaporating Flask Seal 25
6.5 Replacement of the Seals for the Distribution Head 25
6.6 Replacement of the Vacuum Seal 26
6.7 Cleaning 26
6.8 Vacuum Seal 26
6.9 Testing for Leaks 27
6.10 Customer Service 27
7 Taking out of Operation 28
8 Spare Parts and Accessories 29
8.1 Glass Assemblies D, D2, DB, DB2 30/31
8.2 Glass Assemblies R, RB, C 32/33
8.3 Miscellaneous 34
8.4 Accessories 37
9 Appendix 42
9.1 Technical Data 42
9.2 Materials Used 42
9.3 Error Messages 43
9.4 FCC requirements (for USA and Canada) 44
9.5 Declaration of Conformity 45
1 Scope of Delivery 2
2 Safety 3
3 Function 6
3.1 Principle of Operation 6
4 Putting into Operation 7
4.1 Installation Location 7
4.2 Unpacking 7
4.3 Setting up the Support Rod 8
4.4 Attachment of the EasyClamp 9
4.5 Removal of the EasyClamp 9
4.6 Installation of the Reflux Glass Assembly 10
4.7 Installation of the Descending Glass Assembly 11
4.8 Installation of the Descending Glass Assembly
with a 2nd Cooler 12
4.9 Installation of the Receiving Fixture 13
4.10 Attaching and Removing Flasks 14
4.11 Hose Coupling 16
4.12 Operating the Shut-off tap 18
4.13 Bath Replenishment (Optional) 18
4.14 Reset of the over-temperature protection 19
4.15 Heating Medium 19
4.16 Checking Installation 19
5 Operation 20
5.1 Arrangement of the Operator Control and
Display Elements 20
5.2 Adjusting the Maximum Set-Point Temperature
and Automatic Lowering of the Bath in Case of
a Power Interruption 20
5.3 Tips and Tricks 21
5.4 Table of Solvents 22

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BÜCHI Rotavapor R-220
1 Scope of Delivery
Fig. 1: R-220, Overall View
1 Scope of Delivery
Component
1 Chassis, complete, with control and
driving unit and with heating bath
1 6L, 10L or 20L Evaporation flask
1 Receiving flask 1 x 10L Single receiver or
2 x 10L Interchangeable receivers
1 Glass assembly
(Refer to Chap. 4.6 - 4.8 for Figure)
Table 1: Scope of Supply
Standard Accessories: Ordering No.
1 Seal tool 20057
1 Operating Manual
German 96736
English 96737
French 96738
Italian 96739
Spanish 96740
Table 2: Standard Accessories

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BÜCHI Rotavapor R-220 2 Safety
2 Safety
This unit has been built in accordance with the latest state of
the art and with recognized rules of safety.
Nevertheless there are certain risks and dangers entailed with
this unit:
• whenever the unit is operated by individuals who lack
sufficient training;
• whenever the unit is used for some purpose other than its
authorized use.
2.1 Symbols
Stop
Information on dangers that can cause serious material
damage and severe personal injuries or death.
Warning
Information on dangers that can be injurious to one’s health
or cause material damage.
Note
Information pointing out technical requirements. A failure to
observe such information can lead to malfunctions, uneco-
nomical operation, and losses in production.
2.2 Responsibilities of the Operator
This unit may only be used by technical staff and by individuals
who, based on their training or their professional experience,
have a good understanding of the dangers that can arise
from the its operation.
Staff who do not have this training and individuals who are
currently in training must be given careful instructions. This
Operating Manual should be used as the basis for such training.
2.3 Authorized Use
The rotary evaporator has been designed for use in technical
laboratories and in production. It is authorized for use in applica-
tions that work with the evaporation and condensation of
solvents.
It is used for:
• Evaporation of solvents and suspensions
• Drying of powders and granulates
• Re-crystallization
• Reactions under reflux
• Synthesis and Cleaning of refined chemicals
• Recycling and concentration of solvents
The authorized use of the Rotavapor also includes its care,
upkeep, and careful handling in accordance with the provisions
in this Operating Manual.

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BÜCHI Rotavapor R-220
2 Safety
2.4 Unauthorized Use
Any use other than those indicated above, and any use that
is not in conformity with the Technical Data is considered to
be misuse. The operator himself bears sole responsibility for
all damage or injuries arising from any such use.
The following applications in particular are strictly forbidden:
• The production and processing of materials that can cause
spontaneous reactions, e.g., explosives;
• Working without the evaporation flask being immersed in
the water bath (risk of breakage);
• The drying of hard, brittle materials (e.g., stones, soil sam-
ples) that might cause damage to the receiving flask;
• Sudden shock-cooling of the evaporating flask.
The Rotavapor R-220 is not intended for work done under
overpressures.
2.5 Basic Dangers
Basic dangers arise when working with the following:
• The hot water or oil bath (risk of being scalded);
• Contaminated solvents that produce residues from distilla-
tion which could cause spontaneous reactions (e.g., metal
hydrides);
• Solvents that can produce peroxides (risk of explosions);
• Mixtures with unknown compositions or contamination;
• Damaged glassware;
• Electrostatic charges while working, e.g., during the trans-
fer of combustible solutions and while drying powders;
• Temperatures of coolants that lie below the freezing point
of the distillate (A clogging of the distillate cooler due to
freezing out can result in too great an overpressure).
2.6 Safety Precautions
All regional and local laws and regulations must be observed.
The Rotavapor has been grounded internally to dissipate any
electrostatic charges on it.

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BÜCHI Rotavapor R-220
It is always mandatory to wear personal protective gear such
as protective eyewear and protective clothing.
The machine must never be rotated without the snap flange
coupling and evaporation flask being closed.
No distillation may be started unless the evaporating flask is
immersed in the bath. There is always the risk that the neck
of the flask might break off due to the great weight involved.
There is a risk of becoming scalded while changing evaporating
flasks. Wearing gloves prevents this.
Check the glass components regularly for possible damage,
spreading impact marks, or cracks.
Never interrupt the grounding conductor (protective conductor).
Otherwise there will be the risk of an electrical shock!
The operator bears responsibility for providing proper instruction
of his operating staff. To aid him in doing this, translations of
this Operating Manual are also available in several other
languages. As an integral component of the rotary evaporator,
this Operating Manual must be readily available at all times to
the operating staff at the location where they are using the
unit.
The operator must inform the manufacturer immediately of
any and all events relevant to safety that occur in his use of
this equipment.
2.7 Modifications
No modifications are permissible without consulting with and
obtaining the written approval of the manufacturer.
No glass assemblies other than those recommended by the
manufacturer may be used, nor may any glass components
be put together arbitrarily.
Only those components of the rotary evaporator intended for
fulfillment of its function may be installed in or removed from
the unit. This may be done either by hand, or with the use of
the tool supplied along with the unit. The removal of safety
devices or covers using some commercially available tool is
— other than for authorized commissioning personnel — strictly
forbidden. Contact with parts that are electrically live may
result in fatal injury!
2 Safety

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BÜCHI Rotavapor R-220
3 Function
Fig. 2: Principle of operation of the R-220
3 Function
A vacuum rotary evaporator is used for quick single-stage
distillations that treat the product gently. The process is based
on the evaporation and condensation of solvents in a rotating
evaporating flask.
It is possible to work under a vacuum to ensure gentler treat-
ment of the product and increase productive output.
Distillation may be done either under a vacuum or at atmos-
pheric pressure.
A secure closeness is guaranteed in the low pressure range.
3.1 Principle of Operation
햲Evaporation Zone
The solvent in the evaporating flask is heated by the heating
bath. The rotation of the evaporating flask ensures an in-
tensive exchange of heat and mass within the contents of
the flask, forming a thin film of solvent on the inner surface
of the flask. This combination of turbulence and film prevents
local overheating and ensures high distillation speed.
햳Rotary Drive
The drive unit ensure the uniform rotation of the evaporating
flask.
햴Cooling Zone
The solvent vapor flows into the cooler at a high speed.
This is where the energy in the solvent vapor is transferred
to the cooling medium (e.g., water). The solvent condenses.
햵Receiving Flask
The receiving flask is used to collect the condensate.
햶Vacuum Cover
The system pressure is reduced so as to lower the boiling
point of the solvent. The reduction in thermal loading that
results ensures gentle treatment of the product and offers
energetic advantages.
The pressure (vacuum) of distillation, the temperature of the
heating bath, the rotational speed, and the size of the evapo-
rating flask all affect the evaporation output. Refer to Chapter
5.3 for how to select the optimum conditions of distillation.
햵
햴
햲
햳
햶

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BÜCHI Rotavapor R-220 4 Putting into Operation
4 Putting into Operation
The danger zone around the Rotavapor R-220 can extend
outward by up to 10 m. When working inside this danger
zone, there is a risk of damaging the glass parts, which could
cause them to implode.
The electrical connection must be installed and checked
by an authorized person.
4.1 Installation Location
Always set the unit up on a clean, stable, and flat surface.
Never at a location where there is a great deal of personal
traffic (breaking or broken glass) !
The dimensions of the rotary evaporator are:
Height:
without trolley Reflux 1700 mm
Descending 1800 mm
Bullfrog Reflux 1430 mm
Bullfrog Descending 1550 mm
with trolley Reflux 2300 mm
Descending 2400 mm
Width:
Reflux 1100 mm
Descending 1250 mm
Descending, with 2 coolers 1250 mm
Depth:
Single receiver 550 mm
Interchangeable receivers 650 mm
4.2 Unpacking
Take care not to break the glass when opening cartons that
contain glassware.
Look for any damage after unpacking. It is important that any
damage in transit be identified right when unpacking. If nec-
essary, make an immediate assessment of the situation (Notify
the post office, the railroad, or the shipping company involved).
Save the original packing for possible transport at a later date.

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BÜCHI Rotavapor R-220
4 Putting into Operation
Fig. 3: Support rod
4.3 Setting up the Support Rod
• Place the support rod 햳into the holder provided for it and
lower it into the foot hole at the back. Fix it tight using the
locking screw 햲.
• Put the positioning ring 햴on over the rod, 150 mm below
the upper edge.
• Lay the pivoting clamp 햵on top of the positioning ring.
• Attach the pivoting clamp for the receiving flask 200 mm
above the bottom edge of the rod.
When installing an interchangeable receiver:
• Place the short support rod into the holder at the front and
lower it into the foot hole. Screw it tight using the locking
screw.
• Attach the pivoting clamp approx. 200 mm above the lower
edge of the rod.
햲
햴
햳
햵

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BÜCHI Rotavapor R-220 4 Putting into Operation
4.4 Attachment of the EasyClamp
• Carefully lay the EasyClamp around the glass and fold the
top and bottom segments together, closing them at their
open connection point.
• Insert the bolt that does not have a spacer spring, and
tighten the knurled nuts slightly.
• Tighten all knurled nuts uniformly by hand.
Note:
Always tighten the knurled nuts by hand and not to the block
(with the spring pressed together completely). Otherwise the
prestressing will be lost.
There must always be a gap of about 2 mm between the
knurled nut and the support surface.
4.5 Removal of the EasyClamp
On all EasyClamp connections, only the bolt without a
spacer spring has to be removed in order to open the con-
nection.
• Release the knurled nuts on all (2 or 3) bolts until the springs
have been relieved. Do not, however, screw the nut all
the way off.
• On the bolt that does not have a spacer spring, release
the knurled nut far enough (without removing it completely)
so that the bolt can be tilted out and removed as a unit.
• At the connection point, which is now open, spread the
top and bottom segments apart and carefully remove the
EasyClamp.
Fig. 4: Attachment of the EasyClamp
Fig. 5: Removal of the EasyClamp

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BÜCHI Rotavapor R-220
햸
햺
햻
햷
햲
햹
햶
햳
햵
햴
햶
4 Putting into Operation
4.6 Installation of the Reflux Glass Assembly
All glassware used must be intact, with no signs of cracks,
spreading impact marks, or other damage. Inspect the glass-
ware visually before installing it.
• Fix the reflux distribution head 햲in position on the gear
head using a DN70 EasyClamp connection.
• Introduce the cooler 햳, together with the cooler holder
햴, into the pivoting clamp 햵and connect it to the distribu-
tion head (DN45 EasyClamp connection).
• Align the cooler 햳in a vertical position and fix it in place
with the pivoting clamp 햵.
• Screw the cooling water hose nipples 햶onto the cooler
햳.
• Insert the shut-off tap 햷into the distribution head 햲and
tighten it firmly.
• Introduce the stop cock 햸into the distribution head with
the PTFE hose attached to it, and secure it with a standard
joint clamp 햹.
• Attach the condensate cooler 햺to the distributor head
with a DN25 EasyClamp connection and fix it in position.
• Screw the temperature sensor 햻into the distribution head
햲.
• Check all EasyClamp connections and tighten them evenly
and in parallel.
→The installation of the receiving fixture is described on Page
13.
Fig. 6: Reflux glass assembly