10
Installation
Choose the cross-section of the exhaust line to be at least the size of the nominal
connection diameter of the vacuum pump's exhaust connection.
Piping to the pump must be suspended or supported.
– Physical forces from the piping system must not be allowed to act on vacuum
pumps.
Lay piping from the pump sloping downward so that no condensate can flow
back into the pump; otherwise fit a condensate separator.
– If an air trap is created in the system, then a device for draining condensation
water must be provided at the lowest point.
5.5 Connecting to the mains power supply
Order the mains cable separately (see "accessories").
Plug the mains cable into the the mains connection of the relay box.
Connect the mains cable to the mains.
Voltage range of the
backing pump
The backing pump is driven by single-phase extended voltage range motors with
reversible voltage ranges.
• 180 ... 254 V, 50/60 Hz
• 90 ... 126 V, 50/60 Hz
Set the desired voltage range on the voltage selector switch using a suitable
screwdriver.
WARNING
Ensure safe electrical installation
Safe operation after installation is the responsibility of the operator.
Do not independently modify or change the pump and electrical equipment.
Make sure that the system is integrated in an emergency off safety circuit.
Always ensure a safe connection to the protective earthing conductor (PE, protection
class I).
Consult Pfeiffer Vacuum for special requirements.
CAUTION
Automatic start
After connecting the supply voltage and switching on the main switch, pumping stati-
ons
without
display and control unit will run up immediately.
Switch the mains switch to position "0" before plugging in the mains cable.
Switch on the mains supply immediately before operation.
NOTE
Overvoltage!
An incorrect voltage range setting can damage the motor.
Always check the voltage range before switching on the pumping station.
Disconnect the mains supply before changing the voltage range of the backing
pump.
