Edwards nEXT400 User Manual

The nEXT pump is supplied with an inlet screen. The inlet screen is installed in the
cent
ering O-ring for ISO version pumps and in the envelope for CF version pumps. The
nEXT pumps with an NW25 interstage port are supplied with an inlet strainer. The inlet
strainer is installed in the interstage port. The inlet screen and inlet strainer prevent the
damage to the pump caused by debris entering the pump.
The nEXT pump has a vent port for venng the pump and vacuum system to the
atmospheric pressure. The pump has a manual vent valve which can be replaced with a
TAV5 or TAV6 solenoid‑operated vent valve (available as an accessory, refer to
Accessories on page 99). The on‑board motor controller can control the TAV valve.
The nEXT pump has a purge port through which an inert purge gas can be introduced to
protect the bearing and motor from corrosion. You can install an oponal vent port
adapter and purge restrictor to the purge port to control the ow rate of the purge gas
and to lter the gas supply. Refer to Accessories on page 99.
Air coolers and a water‑cooling block are available as an oponal accessory to cool the
nEXT pumps. Refer to Accessories on page 99.
2.2 Pump model descripon
Figure 1 Pump model descripon
NEXT240
SERIAL : YYXXXXXXX
Pump
type
I DL ISO100 NW25/25 105 FPS1
Interstage
Variant
Mechanism
type
Envelope
type
Backing port /
Default
power
setting
interstage port
type
Customer
variant
Year of manufacture
2.3 Pump controller
The pump con
troller has the drive electronics that control the pump operaon and the
TAV vent valve. The connector socket is given at the side of the controller where the
TAV vent valve can be plugged in. Refer to Controller connector socket on page 34.
The controller has three indicator LED's which signal the general status, operaon and
the service status of the pump. The LEDs can be used for fault nding if a problem
occurs. Refer to Indicator LED's on page 35.
The drive electronics system has a number of built‑in safety features to prevent
the pump from damage during sustained high pressure or temperature.
▪ The electronics constantly monitors the temperature in the controller and the
temper
ature of the motor in the pump. If the controller or the motor gets too hot,
04/2022 - ©Edwards Limited
Page 12B80000880_G
B80000880_G - Introducon

Edwards nEXT400 Specifications

General

Brand	Edwards
Model	nEXT400
Category	Water Pump
Language	English