BÜCHI Labortechnik AG
Cleaning and servicing | 7
Operation Manual Vacuum Pump V-100
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7
Cleaning and servicing
NOTE
Users may only carry out the servicing and cleaning operations described in this sec-
tion.
Any servicing and repair work which involves opening up more than the pump top
cover may only be carried out by authorized service technicians.
u
Use only genuine BUCHI consumables and spare parts in order to ensure correct
operation of the device and preserve the warranty.
u
Before carrying out any servicing work, switch off the device and disconnect it
from the power cable.
7.1
Cleaning
7.1.1
Important considerations when cleaning
WARNING
Risk of fatal injury from electric shock.
If the pump is opened up while it is running there is a risk of dangerous electric
shocks.
u
Before carrying out any cleaning or servicing work, always shut down the device
and disconnect the power cable.
7.1.2
Cleaning the pump
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Disconnect all connections to the device.
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Place a collecting vessel under the pump outlet.
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Switch on the Vacuum Pump V-100 and allow it to run.
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Spray ethanol into the pump intake.
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Hold your finger over the pump intake so that a vacuum is created for a short time.
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Remove your finger from the pump intake again.
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Allow the pump to run until there is no more liquid inside the pump heads.
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Repeat the procedure if necessary.
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Switch off the pump and reconnect the apparatus.
7.1.3
After working with strong acids
After distilling strong acids or corrosive solutions the pump should be flushed out in
order to increase its service life.
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Detach tubing connections to other laboratory equipment.
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If present, remove Woulff bottle from pump intake and secondary condenser or
cold trap from pump outlet and clean them.
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Place a bowl or glass collection vessel under the pump outlet.
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Switch on the pump and pour 5 to 10 mL of water into the pump intake.
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Test the pH level of the water collected at the pump outlet.
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Repeat the flushing process until the discharged water has a pH level of between
3 and 9.
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Allow the pump to run for two to three minutes to dry out.
