Edwards nEXT400 User Manual

Note:
If a vent res
trictor is used, the me necessary to vent the vacuum system can be long.
Use a vent valve without a vent restrictor to decrease the me. Before you open the vent
valve, wait unl the speed of the pump decreases to 50% of the full rotaonal speed.
4.9.3 Vent valve control
You can use controller electronics to control the TAV5 solenoid valve or
TAV6 solenoid valve.
To control the solenoid valve:
1. Install the electrical connector supplied with the pump at the lead of the TAV5
solenoid valve or TAV6 solenoid valve.
2. Make sure that the cable cores and screen are wired correctly. Follow the electrical
connecon instrucons given in the Accessories Manual (supplied with the
TAV valve) and refer to Figure: Controller connector showing pin numbers.
3. Connect the connector into the socket at the side of the controller. Refer to Figure:
Controller status informaon.
Refer to Table: Vent opons for details on dierent vent opons.
Table 18 Vent opons
Opon number
Descripon of the vent funcon
0
Vent valve opens fully below 50% full rotaonal speed for the
stop command or fail. This is the factory default seng.
1
Controlled venng fr
om 100% to 50% full rotaonal speed, vent
valve opens fully below 50% for the stop command or fail.
2
Vent valve fully opens immediately if the stop command is re-
ceived, v
ent valve opens fully below 50% full rotaonal speed if
fail.
3
Vent valve fully opens immediately if stop command is received,
con
trolled venng from 100% to 50% full rotaonal speed if fail
then vent valve opens fully below 50 %.
4
Vent valve fully opens immediately if fail, vent valve opens fully
below 50% full rotaonal speed if stop.
5
Vent valve fully opens immediately if Fail, controlled venng
from 100% to 50% full rotaonal speed if Stop command re-
ceived then vent valve opens fully below 50%.
6.7
Vent valve fully opens immediately for the Stop command or
Fail.
When the pump is shipped, the controller is set to the factory default vent opon 0,
re
fer to Table: Vent opons. You can congure the controller to one of the other vent
opons. Commands can be sent through the serial interface or the
manufacturer's TIC Turbo and Instrument Controller or Turbo Controller.
The controller only operates (shuts) the TAV solenoid valve when it receives a start
command. Before the controller operates (shuts) the TAV solenoid valve, the valve will
be in the 'open' vent state. If the vacuum system is a large system, let backing pump
decrease the pressure in the system to an acceptable level before you start the pump.
04/2022 - ©Edwards Limited
Page 59B80000880_G
B80000880_G - Inst
allaon

Edwards nEXT400 Specifications

General

Brand	Edwards
Model	nEXT400
Category	Water Pump
Language	English