BÜCHI Labortechnik AG
Cleaning and servicing | 7
Operation Manual Vacuum Pump V-100
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Detach all connections (tubing and communication cable) from the pump.
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Place a collecting vessel under the pump outlet.
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Switch on the pump.
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Spray a small amount of acetone (approx. 10 mL) into the pump intake.
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Wait until the sound of the pump changes back to what it was before the acetone
was injected.
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Repeat this procedure four times.
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Re-attach the connections to the pump and check whether the terminal vacuum is
now achieved.
If the V-100 is still unable to achieve the required performance even after the valve
heads have been cleaned, both pump heads must be dismantled and manually
cleaned (see Chapter 7.2.2 "Dismantling and reassembling pump head", page 35).
7.1.8
Cleaning non-return valve
The V-100 operates with a total of four non-return valves. There is one valve with an
O-ring in the connection on each of the two ports on each pump head. To clean the
valves, the pump heads have to be dismantled as follows:
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Remove the pump top cover and dismantle the pump heads (see Chapter 7.2.2
"Dismantling and reassembling pump head", page 35).
7.1.9
Cleaning the membrane
After evacuation, there may still be residual fluid on the membrane from condensed
vapors. The pump can largely dry itself out when running idle.
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Detach connections to other laboratory equipment and allow the pump to run in
continuous mode.
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Switch off the pump after three to five minutes.
If the membrane is contaminated by residues, the pump heads must first be disman-
tled and the membranes then unscrewed and cleaned.
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Remove the pump top cover and remove the pump heads (see Chapter 7.2.2 "Dis-
mantling and reassembling pump head", page 35).
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Unscrew the membranes (see Chapter 7.2.3 "Replacing the membrane",
page 38).
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Wipe down membranes with a damp cloth.
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Refit the membranes (see Chapter 7.2.3 "Replacing the membrane", page 38).
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Refit the pump heads and pump top cover (see Chapter 7.2.2 "Dismantling and re-
assembling pump head", page 35).
7.2
Servicing
7.2.1
Notes on servicing
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.
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Before carrying out any cleaning or servicing work, always shut down the device
and disconnect the power cable.
