Pfeiffer DUO 3 - Connecting to mains power supply

NOTICE
Malfunction and damage to the vacuum pump from inadmissible exhaust line installation
Negative pressure in the exhaust line causes malfunctions and damage to the vacuum pump. Nega-
tive pressure is permitted only in rotary vane vacuum pumps with magnetic coupling.
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When dissipating gases, make sure that the exhaust pressure is at least 250 hPa higher than the
intake pressure.
Condensate separator
Pfeiffer Vacuum recommends installing a condensate separator, with condensate drain at
the lowest point of the exhaust line.
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2
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Fig. 7: Exhaust connection with flange connection
1 Exhaust line 4 Clamping ring
2 Centering ring with nozzle and O-rings 5 Exhaust connection
3 O-ring
Procedure
1. Remove the protective cap from the exhaust flange.
2. Observe the centering ring with nozzle including the corresponding O-rings (2×).
3. Choose a minimum exhaust line diameter equal to the nominal diameter of the connection flange.
4. Depending on the pump type, use PVC or metallic hoses with flange connections from the Pfeiff-
er Vacuum component shop.
5. Route the piping downwards from the vacuum pump, to prevent condensate return.
6. Support or suspend the piping to the vacuum pump so that no piping system forces act on the
vacuum pump.
7. Connect both flanges with a circlip.
5.4 Connecting to mains power supply
DANGER
Danger to life from electric shock
Touching exposed and voltage-bearing elements causes an electric shock. Improper connection of
the mains supply leads to the risk of touchable live housing parts. There is a risk to life.
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Before the installation, check that the connection leads are voltage-free.
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Make sure that electrical installations are only carried out by qualified electricians.
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Provide adequate grounding for the device.
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After connection work, carry out an earthed conductor check.
Installation
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