Inert Loop S-395
Operation Manual
11594358 | A en
Imprint
Product Identification:
Operation Manual (Original) Inert Loop S-395
11594358
Publication date: 08.2022
Version A
BÜCHI Labortechnik AG
Meierseggstrasse 40
Postfach
CH-9230 Flawil 1
E-Mail: quality@buchi.com
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
Table of contents
1 About this document........................................................................................................... 5
1.1 Mark-ups and symbols ..........................................................................................................5
1.2 Connected instruments..........................................................................................................5
1.3 Trademarks ...........................................................................................................................5
2 Safety....................................................................................................................................6
2.1 Proper use .............................................................................................................................6
2.2 Use other than that intended .................................................................................................6
2.3 Staff qualification ...................................................................................................................6
2.4 Personal protective equipment ..............................................................................................7
2.5 Warning notices in this document.......................................................................................... 7
2.6 Residual risks ........................................................................................................................7
2.6.1 Faults during operation.............................................................................................8
2.6.2 Glass breakage ........................................................................................................8
2.7 Modifications..........................................................................................................................8
2.8 Oxygen sensor ......................................................................................................................8
3 Product description.............................................................................................................9
3.1 Description of function ...........................................................................................................9
3.2 Configuration .......................................................................................................................10
3.2.1 Front view ...............................................................................................................10
3.2.2 Rear view................................................................................................................ 11
3.2.3 Control elements ....................................................................................................11
3.2.4 Type plate...............................................................................................................11
3.3 Scope of delivery .................................................................................................................12
3.4 Technical data .....................................................................................................................12
3.4.1 Inert Loop S-395.....................................................................................................12
3.4.2 Ambient conditions .................................................................................................14
3.4.3 Materials .................................................................................................................14
3.4.4 Installation site........................................................................................................15
4 Transport and storage ......................................................................................................16
4.1 Transport .............................................................................................................................16
4.2 Storage ................................................................................................................................16
4.3 Moving the instrument .........................................................................................................16
5 Installation..........................................................................................................................17
5.1 Before installation ................................................................................................................17
5.2 Establishing electrical connections......................................................................................17
5.3 Installing the exhaust gas hose ...........................................................................................17
5.4 Installing the solvent receiving vessel .................................................................................18
5.5 Installing the oxygen sensor for the first time ......................................................................19
5.6 Installations for a spray drying mode...................................................................................19
Operation Manual Inert Loop S-395 iii
Table of contents Büchi Labortechnik AG
6 Operation............................................................................................................................20
6.1 Preparing the instrument .....................................................................................................20
6.2 Starting the instrument ........................................................................................................20
6.3 Tasks during spray drying ...................................................................................................21
6.4 Shutting down the instrument ..............................................................................................21
6.5 Switching off the instrument ................................................................................................21
6.6 Setting condenser temperature ...........................................................................................21
7 Cleaning and servicing .....................................................................................................22
7.1 Regular maintenance work..................................................................................................22
7.2 Empty the solvent receiving vessel .....................................................................................22
7.3 Cleaning the housing...........................................................................................................23
7.4 Cleaning the ventilation slots...............................................................................................23
7.5 Calibrating the oxygen analyzer ..........................................................................................23
7.6 Checking the controller of the oxygen sensor .....................................................................27
7.7 Changing the oxygen sensor...............................................................................................27
7.7.1 Removing the oxygen sensor .................................................................................27
7.7.2 Installing the oxygen sensor ...................................................................................28
8 Help with faults ..................................................................................................................30
8.1 Error messages ...................................................................................................................30
9 Taking out of service and disposal.................................................................................. 31
9.1 Taking out of service ...........................................................................................................31
9.2 Refrigerant...........................................................................................................................31
9.3 Disposal...............................................................................................................................31
9.4 Returning the instrument .....................................................................................................31
10 Appendix ............................................................................................................................32
10.1 Spare parts ..........................................................................................................................32
iv
Operation Manual Inert Loop S-395
Büchi Labortechnik AG
1 About this document
1.1 Mark-ups and symbols
About this document | 1
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:
u Contact BÜCHI Labortechnik AG Customer Service.
https://www.buchi.com/contact
NOTE
This symbol draws attention to useful and important information.
R This character draws attention to a requirement that must be met before the
instructions below are carried out.
u This character indicates an instruction that must be carried out by the user.
ð This character indicates the result of a correctly carried out instruction.
Mark-up Explanation
Win dow
Tab
Dia log
Software Windows are marked-up like this.
Tabs are marked-up like this.
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 Connected instruments
In addition to this operation manual, follow the instructions and specifications in the
documentation for the connected instruments.
1.3 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.
Operation Manual Inert Loop S-395
5/34
2 | Safety
Büchi Labortechnik AG
2 Safety
2.1 Proper use
The instrument is designed and built for laboratories.
The instrument can be used for the following tasks:
Condense organic solvent from the drying gas from BUCHI spray dryer.
2.2 Use other than that intended
The use of the instrument other than described in proper use and specified in
technical data is use other than that intended.
The operator is responsible for damages or hazards that are caused by use other
than that intended.
Specially the following uses are not permitted:
Use of the instrument in areas which require explosion-safe instruments.
Use the instrument with non-BUCHI instruments.
Use of the instrument for processing substances outside of research and
development.
Use of the instrument with gases with unknown chemical composition.
Use of the instrument with samples containing peroxides.
Use of the instrument with samples that can form peroxides.
Use of the instrument with samples which produce oxygen during the processing.
Use of the instrument with toxic substances without appropriate safety measures.
Use of the instrument with biohazardous materials such as viruses or bacteria.
Use of the instrument with substances which might explode or ignite because of
the processing.
Use of the instrument with corrosive samples.
2.3 Staff qualification
Unqualified persons are unable to identify risks and are therefore exposed to greater
dangers.
The instrument may only be operated by suitably qualified laboratory staff.
These operating instructions are aimed at the following target groups:
Users
Users are persons that meet the following criteria:
They have been instructed in the use of the instrument.
6/34
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 instrument.
Operation Manual Inert Loop S-395
Büchi Labortechnik AG
2.4 Personal protective equipment
Safety | 2
Operator
The operator (generally the laboratory manager) is responsible for the following
aspects:
The instrument 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 instrument should be reported
to the manufacturer (quality@buchi.com).
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.
Depending on the application, hazards due to heat and/or corrosive chemicals may
arise.
u Always wear appropriate personal protective equipment such as safety goggles,
protective clothing and gloves.
u Make 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 instrument.
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.
2.6 Residual risks
The instrument has been developed and manufactured using the latest technological
advances. Nevertheless, risks to persons, property or the environment can arise if
the instrument is used incorrectly.
Appropriate warnings in this manual serve to alert the user to these residual
dangers.
Operation Manual Inert Loop S-395
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2 | Safety
Büchi Labortechnik AG
2.6.1 Faults during operation
If an instrument is damaged, sharp edges, glass splinters, moving parts or exposed
electrical wires can cause injuries.
u Regularly check instruments for visible damage.
u If faults occur, switch off the instrument immediately, unplug the power cord and
inform the operator.
u Do not continue to use instruments that are damaged.
2.6.2 Glass breakage
WARNING
In the rare case of an abrupt massive leakage like a glass breakage a deflagration
can happen.
Risk of injury from flying glass splinters.
u Leave the instrument immediately.
u Stay in a safe distance for 1 minute.
u Do not switch off or unplug the instrument.
u Wait until the instrument changed independently into a safe state to get back.
2.7 Modifications
Unauthorized modifications can affect safety and lead to accidents.
u Use only genuine BUCHI accessories, spare parts and consumables.
u Carry out technical changes only with prior written approval from BUCHI.
u Only allow changes to be made by BUCHI service technicians.
BUCHI accepts no liability for damage, faults and malfunctions resulting from
unauthorized modifications.
2.8 Oxygen sensor
The instrument is equipped with an oxygen measurement sensor to ensure a safe
operation when spraying combustible solvent. The inertization of the instrument is
continuously monitored. In case of an oxygen concentration above 6% the
instrument is able to immediately stop the solvent spraying. A safe state will be
reached with a maximum time delay of 15 to 25s. The actual time delay depends on
the drying gas flow rate.
The used sensor is SIL capable.
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Operation Manual Inert Loop S-395
Büchi Labortechnik AG
3 Product description
3.1 Description of function
Product description | 3
The instrument is an accessory for BUCHI Spray Drying Instruments. It enables the
safe use of organic solvents in closed loop mode.
The spray drying process in closed loop mode generates an inert gas stream loaded
with solvent vapors. The instrument is used to condense these solvent vapors from
the gas stream and to monitor its oxygen concentration.
The gas flow enters the instrument and passes the pre-heat exchanger where it is
cooled before entering the condenser. After solvent vapor condensation, the gas
stream is reheated by the pre-heater before being returned to the spray drying
process. The excess inert gas leaves the instrument via the exhaust and the
condensed solvent vapors are collected in a closed bottle.
The following spray drying modes are available:
Spray drying mode Solvent composition
Closed mode with Inert Loop
(When using Ultrasonic Package acces-
sory inert gas adapter is necessary)
Closed mode with Inert Loop and Dehumidifier
(When using Ultrasonic Package accessory inert gas adapter is necessary)
between 90 % - 100 % organic solvent
between 20 % - 80 % organic solvent
Operation Manual Inert Loop S-395
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3 | Product description
4
5
6
3
9
1
2
7
8
3.2 Configuration
3.2.1 Front view
Büchi Labortechnik AG
Fig.1: Front view
1 Control elements
(See Control elements)
2 Oxygen analyzer
(Front cover oxygen analyzer)
3 Communication cable 4 Exhaust connection
(marked: Exhaust)
5 Process gas out
(marked: OUT)
6 Process gas in
(marked: IN)
7 Ventilation area 8 Solvent receiving vessel
9 Castor wheels
10/34
Operation Manual Inert Loop S-395
Büchi Labortechnik AG
3
4
1
2
5
1
2
3
4
5
6
7
8
9
3.2.2 Rear view
Product description | 3
Fig.2: Rear view
1 Type plate 2 Power connection
3 Fuses 4 Ventilation area
5 Ventilation area
3.2.3 Control elements
Fig.3: Control elements
1 Display 2 Set temperature up
3 Switch on 4 Signal lamp power
5 Signal lamp pressure 6 Signal lamp oxygen
7 Signal lamp operation 8 Switch off
9 Set temperature down
3.2.4 Type plate
The type plate identifies the instrument. The type plate is located at the rear side of
the instrument. See Side connections
Operation Manual Inert Loop S-395
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3 | Product description
Büch Labortechnik AG
Meierseggstrasse 40 CH - 9230 Flawil / Switzerland
Made in Germany
10
9
1
2
11
12
3
8
4
5
6
7
14
13
Büchi Labortechnik AG
Fig.4: Type plate
1 Instrument name 2 Serial number
3 Article number 4 Refrigerant details
5 Global warming potential 6 Input voltage range
7 Power consumption maximum 8 Fuse type
9 High-pressure system design pres-
sure
11 Year of manufacture 12 Company name and address
13 Approvals 14 Symbol for "Do not dispose of as
3.3 Scope of delivery
NOTE
The scope of delivery depends of the configuration of the purchase order.
Accessories are delivered as per the purchase order, order confirmation, and
3.4 Technical data
3.4.1 Inert Loop S-395
delivery note.
Specification Inert Loop
S-395
200 V
50 Hz
Dimensions
(W x D x H)
705 x 660 x
687 mm
Inert Loop
S-395
230 V
50 Hz
705 x 660 x
687 mm
Filling capacity
Frequency
10 Low-pressure system design pressure
household waste"
Inert Loop
S-395
200 V
60 Hz
705 x 660 x
687 mm
Inert Loop
S-395
240 V
60 Hz
705 x 660 x
687 mm
Inert Loop
S-395
220 V
60 Hz
705 x 660 x
687 mm
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Operation Manual Inert Loop S-395
Büchi Labortechnik AG
Product description | 3
Specification Inert Loop
S-395
200 V
50 Hz
Inert Loop
S-395
230 V
50 Hz
Inert Loop
S-395
200 V
60 Hz
Inert Loop
S-395
240 V
60 Hz
Inert Loop
S-395
220 V
60 Hz
Weight 96.7 kg 91 kg 96.7 kg 96.7 kg 91 kg
Power consumption
max. 1700VAmax. 1700VAmax. 2000VAmax. 2000VAmax. 2000
VA
Frequency 50 Hz 50 Hz 60 Hz 60 Hz 60 Hz
Connection
200 V ± 10 % 230 V ± 10 % 200 V ± 10 % 240 V ± 10 % 220 V ± 10 %
voltage
Primary fuse 10 A 10 A 14 A 14 A 12 A
Secondary
10 A - 12 A 12 A -
fuse
IP Code IP20 IP20 IP20 IP20 IP20
Overvoltage
II II II II II
category
Pollution de-
II II II II II
gree
Protection
I I I I I
degree
Rate of cooling*
800 W at 0°C800 W at 0°C920 W at 0°C920 W at 0°C920 W at 0
°C
Refrigerant R449A R449A R449A R449A R449A
CO-equiva-
1.369 t 1.369 t 1.369 t 1.369 t 1.369 t
lent
Filling
0.98 kg 0.98 kg 0.98 kg 0.98 kg 0.98 kg
amount of
refrigerant
Safety Group
Refrigerants
(ASHRAE)
Maximum al-
A1 (lower
toxicity, no
flame propagation)
A1 (lower
toxicity, no
flame propagation)
A1 (lower
toxicity, no
flame propagation)
A1 (lower
toxicity, no
flame propagation)
A1 (lower
toxicity, no
flame propagation)
22 bar 22 bar 22 bar 22 bar 22 bar
lowable
pressure (PS)
[Low pressure side]
Maximum allowable
pressure (PS)
[High pressure side]
Operation Manual Inert Loop S-395
26 bar 26 bar 26 bar 26 bar 26 bar
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3 | Product description
Büchi Labortechnik AG
Specification Inert Loop
S-395
200 V
50 Hz
Min. process
-30 °C -30 °C -30 °C -30 °C -30 °C
gas temperature
Max. process
8 °C 8 °C 8 °C 8 °C 8 °C
gas temperature
Minimum
300 mm 300 mm 300 mm 300 mm 300 mm
clearance on
all sides
*The max. cooling capacity is only guaranteed up to 5% undervoltage.
3.4.2 Ambient conditions
For indoor use only.
Max. altitude above sea level 2000 m
Inert Loop
S-395
230 V
50 Hz
Inert Loop
S-395
200 V
60 Hz
Inert Loop
S-395
240 V
60 Hz
Inert Loop
S-395
220 V
60 Hz
Ambient temperature 5‒35 °C
Maximum relative humidity 80 % for temperatures up to 31 °C
Storage temperature max. 40 °C
3.4.3 Materials
Component Materials of construction
Hose connections, tubing, weld-on nipple Stainless steel 1.4571
Pre-heat exchanger, condensate separator
Plate heat exchanger Stainless steel 1.4401
Screw connections, Ball valve Stainless steel 1.4408
Sealing ball valve PTFE
Pipe elbow Stainless steel 1.4307
Pressure switch PVDF, Viton, NBR/aramid fiber composite
Oxygen sensor PA, PPS, PTFE, stainless steel
decreasing linearly to 50 % relative humidity at 35 °C
Stainless steel 1.4301
14/34
Black hoses EPDM
Drain tube PVC
Woulff bottle Glass
Plate heat exchanger Stainless steel solder
Operation Manual Inert Loop S-395
Büchi Labortechnik AG
3.4.4 Installation site
Product description | 3
The installation site meets the safety requirements. See Chapter2 "Safety",
page6
The installation site has a firm, level and nonslip surface.
The installation site has no obstacles (e.g. water taps, drains, etc.).
The installation site has an own mains outlet socket for the instrument.
The installation site is not exposed to external thermal loads, such as direct solar
radiation.
The installation site has enough space that cables / tubes can be routed safely.
The installation site meets the requirements for the connected devices. See
related documentation
The installation site meets the specifications according to the technical data (e.g.
weight, dimension, etc.). See Chapter3.4 "Technical data", page12
The installation site allows that the power supply can be disconnected at any time
in an emergency.
The installation site fits basic electromagnetic environment / Emission Class B.
Make sure there is free flow of air to the side of the instrument.
Do not place loose papers or cloths below or to the sides of the instrument, as
these could impede the air circulation if drawn in.
Put the instrument on the castors directly on the floor, do not use a pad.
Make sure the castor brakes are locked.
Place only BUCHI spray dryer on the instrument.
Do not place the instrument near vibration-sensitive devices.
Operation Manual Inert Loop S-395
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4 | Transport and storage
4 Transport and storage
4.1 Transport
4.2 Storage
Büchi Labortechnik AG
NOTICE
Risk of breakage due to incorrect transportation
u Make sure that all parts of the instrument are safely packed in such a way as to
prevent breakage, ideally in the original box.
u Avoid sharp movements during transit.
u After transportation, check the instrument for damage.
u Damage that has occurred in transit should be reported to the carrier.
u Keep packing for future transportation.
u Make sure that the ambient conditions are complied with (see Chapter3.4
"Technical data", page12).
u Wherever possible, store the instrument in its original packaging.
u After storage, check the instrument, all seals and tubing for damage and replace
if necessary.
4.3 Moving the instrument
u Release the castor breaks.
u Move the instrument to the designated place.
u Lock the castor breaks.
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Operation Manual Inert Loop S-395
Büchi Labortechnik AG
5 Installation
5.1 Before installation
5.2 Establishing electrical connections
Installation | 5
NOTICE
Instrument damaged if switched on too early.
After transporting, wait twelve hours before switching on the instrument. The fluid
in the cooling system requires twelve hours to collect in the refrigerant compressor.
NOTICE
Risk of instrument damage because of not suitable power supply cables.
Not suitable power supply cables can cause bad performance or an instrument
damage
u Use only BUCHI power supply cables.
Precondition:
R The electrical installation is as specified on the
type plate.
R The electrical installation is equipped with a
proper grounding system.
R The electrical installation is equipped with
suitable fuses and electrical safety features.
R The installation site is as specified in the
technical date. See Chapter3.4 "Technical
data", page12
u Connect the power supply cable to the
connection on the instrument. See Chapter3.2
"Configuration", page10
u Connect the mains plug to an own mains outlet
socket.
5.3 Installing the exhaust gas hose
CAUTION
Risk of overpressure due to clogged exhaust.
Overpressure can damage the instrument or impact the safety of the user.
u Do not bend, fold or squeeze tubes that are connected to the exhaust.
Operation Manual Inert Loop S-395
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5 | Installation
Büchi Labortechnik AG
u Install the exhaust tube onto the exhaust
connection.
u Attach the tube in place with a hose clamp.
u Place the other end of the tubing to a fume
hood.
5.4 Installing the solvent receiving vessel
u Put the PTFE hose connection on the bottle.
u Put the solvent receiving vessel in place.
u Install the PTFE hose onto the condensate drain
valve.
u Open the condensate drain valve.
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Operation Manual Inert Loop S-395
Büchi Labortechnik AG
5.5 Installing the oxygen sensor for the first time
5.6 Installations for a spray drying mode
Installation | 5
u Make sure that the lever of the condensate
drain valve is in the position indicated.
The primary installation of the oxygen sensor for a new instrument will be guided by
a BUCHI service technician. For further information see Chapter7.7 "Changing the
oxygen sensor", page27.
For installations for a spray drying mode, see separate installation manuals.
"MiniSprayDryer S-300 in closed mode with Dehumidifier and Inert Loop"
"MiniSprayDryer S-300 in closed mode with Inert Loop"
"MiniSprayDryer S-300 in open pressure mode"
"MiniSprayDryer S-300 in open suction mode"
Operation Manual Inert Loop S-395
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6 | Operation
Büchi Labortechnik AG
6 Operation
6.1 Preparing the instrument
Precondition:
R All commissioning operations have been completed. See Chapter5 "Installation",
page17
u Press the button Switch off.
6.2 Starting the instrument
NOTICE
Too frequent switching on the instrument
Too frequent switching on the instrument can cause an instrument damage.
u Wait 10 minutes before restarting the instrument.
NOTE
The correct oxygen value is between 20 - 21 %.
If this value is not reached.
u Calibrate the oxygen sensor. See Chapter7.5 "Calibrating the oxygen analyzer",
page23
ð If a calibration of at least 20.5 % can not be reached replace the sensor. See
Chapter7.7 "Changing the oxygen sensor", page27.
Precondition:
R The instrument is prepared. See Chapter6.1 "Preparing the instrument",
page20.
R Make sure that the solvent receiving vessel is empty. See Chapter7.2 "Empty the
solvent receiving vessel", page22.
u Switch on the connected spray dryer. See Operation manual of the connected
spray dry.
ð The signal lamp oxygen is on.
ð The signal lamp pressure is on.
u Connect the communication cable.
u Check the oxygen value. See Chapter3.2.1 "Front view", page10.
u Set condenser temperature. See Chapter6.6 "Setting condenser temperature",
page21.
u Press the Switch on button. See Chapter3.2.3 "Control elements", page11.
u Make sure, that the compressor is working.
u Switch on the aspirator. See Operation manual of the connected spray dryer.
ð The signal lamp pressure is off.
u Switch on the spray gas.
u Wait until the oxygen level is less than 6 %.
ð The signal lamp oxygen is off.
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Operation Manual Inert Loop S-395
Büchi Labortechnik AG
6.3 Tasks during spray drying
6.4 Shutting down the instrument
Operation | 6
u All following functions of the instrument are controlled by the spray drying
system.
u Check the filling level of the solvent receiving vessel.
ð If necessary empty it. See Chapter7.2 "Empty the solvent receiving vessel",
page22
u Check the temperature.
Precondition:
R The spray drying process is finished. See operation manual of the connected
spray dryer.
u Switch off the spray gas. See operation manual of the connected spray dryer.
ð The signal lamp oxygen is on.
u Switch off temperature. See operation manual of the connected spray dryer.
u Wait until the temperature is less than 70 °C.
u Switch off the aspirator. See operation manual of the connected spray dryer.
ð The signal lamp pressure is on.
u Empty the solvent receiving vessel. See Empty the solvent receiving vessel
6.5 Switching off the instrument
Precondition:
R The instrument is shut down. See Shutting down the instrument
u Press the Switch off button. See Chapter3.2.3 "Control elements", page11.
u Disconnect the communication cable.
u Disconnect the power cable.
6.6 Setting condenser temperature
Increase temperature
u Press the button Set temperature UP. See Chapter3.2.3 "Control elements",
page11.
Decrease the temperature
u Press the button Set temperature DOWN. See Chapter3.2.3 "Control elements",
page11.
Operation Manual Inert Loop S-395
21/34
7 | Cleaning and servicing
7 Cleaning and servicing
7.1 Regular maintenance work
Büchi Labortechnik AG
NOTE
u Carry out only the service and cleaning operations described in this section.
u Do not carry out any servicing and cleaning operations that involve opening the
housing.
u Use only genuine BUCHI spare parts in order to ensure correct operation and
preserve the warranty.
u Carry out the service and cleaning operations described in this section to extent
the lifetime of the instrument.
Action
7.2 Empty the solvent receiv-
Weekly
1
ing vessel
7.3 Cleaning the housing 1
7.4 Cleaning the ventilation
slots
7.5 Calibrating the oxygen ana-
lyzer
7.6 Checking the controller of
the oxygen sensor
7.7 Changing the oxygen sen-
sor
1 - Operator
7.2 Empty the solvent receiving vessel
u Close the condensate drain valve.
Monthly
Additional information
Yearly
Every two years
1
1
1
1 Operational life of sensor is
2 years
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Operation Manual Inert Loop S-395
Büchi Labortechnik AG
Cleaning and servicing | 7
u Disconnect the solvent receiving vessel.
u Remove the solvent receiving vessel from the
instrument.
u Empty the solvent receiving vessel.
u Install the solvent receiving vessel in revers
order.
7.3 Cleaning the housing
u Wipe down the housing with a damp cloth.
u If heavily soiled, use ethanol or a mild detergent.
u Wipe down the display with a damp cloth.
7.4 Cleaning the ventilation slots
u Remove dust and foreign objects from the ventilation slots using compressed air
or a vacuum cleaner.
7.5 Calibrating the oxygen analyzer
NOTE
The calibration should be performed with the sensor removed.
To avoid calibration errors, clean ambient air or certified 20.9% level oxygen should
be applied to the sensor.
u If an ambient air calibration is performed, it is recommended that the oxygen
level is confirmed by a portable oxygen meter.
Operation Manual Inert Loop S-395
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7 | Cleaning and servicing
%
1
23
Büchi Labortechnik AG
Fig.5: Control elements oxygen sensor
1 Display 2 DECREMENT
3 INCREMENT
Precondition:
R The correct oxygen value is between 20 - 21 %.
u If this value is not reached the sensor needs to be calibrated.
u Disconnect the power cable.
u Disconnect the communication cable, see
Chapter3.2.1 "Front view", page10.
u Remove the screws at the indicated positions.
u Open the front cover oxygen sensor.
u Remove the grounding cable from the front
cover oxygen sensor.
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Büchi Labortechnik AG
%
%
1
Cleaning and servicing | 7
u Disconnect the sensor cable by rotating the
securing ring of the cable plug.
u Pull off the plug from the sensor.
u Remove the oxygen sensor.
u Make sure the O-ring (1) stays in its position.
u Reconnect the communication cable, see
Chapter3.2.1 "Front view", page10.
u Reconnect the sensor cable.
u Wait 15 minutes for the electronics to warm up.
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7 | Cleaning and servicing
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Büchi Labortechnik AG
u Press the button INCREMENT or DECREMENT
to set calibration gas level.
u For fine adjustment press one of the buttons
short.
u For accelerated adjustment press one of the
buttons constantly.
u Do not press both buttons together.
ð When the display reads 20.9%, the calibration
is completed.
ð If a calibration of at least 20.5% can not be
reached replace the sensor. See Chapter7.7
"Changing the oxygen sensor", page27.
u Disconnect the communication cable, see
Chapter3.2.1 "Front view", page10.
u Disconnect the sensor cable.
Precondition:
R The O-ring stays in its position.
u Install the oxygen sensor.
ð Screwing force was chosen that sensor is
clearly fixed, but not excessively hard.
u Fit the cable plug on the sensor.
u Connect the sensor cable by rotating the
securing ring of the cable plug.
u Reconnect the communication cable, see
Chapter3.2.1 "Front view", page10.
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u Install the grounding cable.
Operation Manual Inert Loop S-395
Büchi Labortechnik AG
7.6 Checking the controller of the oxygen sensor
Cleaning and servicing | 7
u Install the front cover.
u Place the screws at the indicated positions.
u Connect the power cable.
u Check the correct function of the controller for the oxygen sensor.
u For further information take a look at the document NTR1401-X-SUB03-T2b-
AP10-M2-111 from the sensor manufacturer Ntron Gas Measurement Ltd.
7.7 Changing the oxygen sensor
7.7.1 Removing the oxygen sensor
u Disconnect the power cable.
u Disconnect the communication cable, see
Chapter3.2.1 "Front view", page10.
u Remove the screws at the indicated positions.
u Open the front cover oxygen sensor.
u Remove the grounding cable from the front
cover oxygen sensor.
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7 | Cleaning and servicing
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1
1
Büchi Labortechnik AG
u Disconnect the sensor cable by rotating the
securing ring of the cable plug.
u Pull off the plug from the sensor.
u Remove the oxygen sensor.
u Remove the O-ring (1).
7.7.2 Installing the oxygen sensor
Precondition:
R There is no oxygen sensor installed. See
Chapter7.7.1 "Removing the oxygen sensor",
page27.
R The power cable is disconnected.
u Install a new O-ring (1).
ð The O-ring is seated properly and cannot fall
out accidentally.
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Cleaning and servicing | 7
Precondition:
R The sensor has been calibrated, in case it is a
new sensor. See Chapter7.5 "Calibrating the
oxygen analyzer", page23.
R The communication cable is disconnected.
u Install the oxygen sensor.
ð Screwing force was chosen that sensor is
clearly fixed, but not excessively hard.
u Fit the cable plug on the sensor.
u Connect the sensor cable by rotating the
securing ring of the cable plug.
u Reconnect the communication cable, see
Chapter3.2.1 "Front view", page10.
u Install the grounding cable.
u Install the front cover.
u Place the screws at the indicated positions.
u Connect the power cable.
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8 | Help with faults
8 Help with faults
8.1 Error messages
Büchi Labortechnik AG
NOTICE
Too frequent switching on the instrument
Too frequent switching on the instrument can cause an instrument damage.
u Wait 10 minutes before restarting the instrument.
Fault code Fault Remedy
E01 Temperature sensor
defective
E02 Temperature error
u Switch off the instrument.
u Wait until the instrument is in ambient
temperature.
u Remove dust and foreign objects from the
ventilation slots using compressed air or a
vacuum cleaner.
u Switch on the instrument.
u Contact BUCHI Customer Service.
E04 Compressor pres-
sure fault
u Switch off the instrument.
u Wait until the instrument is in ambient
temperature.
u Switch on the instrument.
u Contact BUCHI Customer Service.
E05 Data error u Switch off the instrument.
u Switch on the instrument.
u Contact BUCHI Customer Service.
E06 Electronic circuitry
overheated
u Switch off the instrument.
u Wait until the instrument is in ambient
temperature.
u Remove dust and foreign objects from the
ventilation slots using compressed air or a
vacuum cleaner.
u Switch on the instrument.
u Contact BUCHI Customer Service.
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9 Taking out of service and disposal
9.1 Taking out of service
9.2 Refrigerant
9.3 Disposal
Taking out of service and disposal | 9
u Switch off the instrument and disconnect it from the mains power supply.
u Remove all tubing and communication cables from the instrument.
CAUTION
Potential environmental hazard.
The instrument uses refrigerant. See Chapter3.4 "Technical data", page12
u Dispose of the appliance properly, if necessary using a professional disposal
service.
The operator is responsible for proper disposal of the instrument.
u When disposing of equipment observe the local regulations and statutory
requirements regarding waste disposal.
u When disposing, observe the disposal regulations of the materials used. Materials
used see Chapter3.4 "Technical data", page12.
9.4 Returning the instrument
Before returning the instrument, contact the BÜCHI Labortechnik AG Service
Department.
https://www.buchi.com/contact
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10 | Appendix
Büchi Labortechnik AG
10 Appendix
10.1 Spare parts
Order no.
Seal PTFE 005155
PTFE hose connection SVL22027338
Order no. Image
Sealing FKM for hose coupling 11056479
Woulf Bottle 041875
Screw cap SVL 22 003577
Screw cap SVL22 005222
Receiving vessel for solvent 040398
Hose Inert Loop TPR conf. 11071076
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Oxygen Sensor S-395
Shelf life max. 1 year
11075130
Operation Manual Inert Loop S-395
Büchi Labortechnik AG
Appendix | 10
Order no. Image
O-Ring Ø29.82x2.62 FKM 70 11075133
Vacuum clamp KF 25 11063662
Silicone hose 10x2.0x80 V0 11075249
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