Edwards nXLi Series User Manual

General descripon
Ov
erview
WARNING:
Improper use of the equipmen
t could cause damage to it or injury to people. The user is
responsible for the safe operaon, installaon and monitoring of the system.
The pump is a cord connected system rated 200 - 230 V, 50/60 Hz, 8.5 A.
The pumping sy
stem is intended for use on clean duty applicaons only.
The pump is not intended for use with potenally ammable, corrosive, toxic or other
hazardous gases since these gases or oxygen can mix within the pumping system.
The compact dry pumping system is opmized to run in steady state gas load condions with
an inlet pressure from 1 – 15 mbar. If the inlet pressure exceeds these pressures for an
extended period, the pump controller will reduce the motor speed. The system will speed up
again aer the pressure is reduced or when the transient overload protecon has recovered.
Refer to Table 9 on page 34 for informaon on maximum inlet pressures.
The system is oered with either an NW40 or NW50 inlet port (Figure 1 on page 11, item
3) and NW25 exhaust port (Figure 1 on page 11, item 2).
The pump mechanism is driven directly by a three-phase electric motor. The motor is
managed by a pump controller.
The system is air cooled by a fan mounted between the pump controller and the pump
cartridge. The fan will connue to run for 5 minutes aer the pump is switched o. The
pump incorporates a thermal protecon device that will stop the motor in the event of
thermal overload, for example, high ambient temperature. In this event, the pump will
require restarng aer cooling down. The system is provided with a connecon for purge
gas should it be required.
The pump is designed to pump the following residual gases normally used in high vacuum
systems:
• Air
• Carbon monoxide
• Neon
• Ethane
• Nitrogen
• Krypton
• Argon
• Helium
• Butane
The pump can be used to pump oxygen and water vapour, subject to the following
condions:
• Oxygen - The oxygen concentraon must be less than 20% by volume.
• Water vapour -Ensure that vapour does not condense inside the pump.
A770-10-880A - General descripon
Page 10

Edwards nXLi Series Specifications

General

Brand	Edwards
Model	nXLi Series
Category	Water Pump
Language	English