Edwards nEXT730D User Manual

Opon num-
ber
Descripon of ven
t funcon
5 In a fail condion, vent valve fully opens immediately. If a stop com-
mand is received, controlled venng from 100% to 50% full rotaonal
speed and then vent valve opens fully below 50%.
6 Vent valve fully opens immediately for either a stop command or a fail
condion.
7 Same as opon 6
8
Auxiliary output is permanently energised (Fan).
§
9 Do not use
10 Auxiliary output is permanently de-energised (Fan).
11 Do not use
12 Do not use
13 Do not use
14 Vent valve opens fully below 50% full rot
aonal speed for a stop com-
mand.
15 Controlled venng from 100% to 50% full rotaonal speed and then
vent valve opens fully below 50% for a stop command.
*
This is the fact
ory default seng for Vent Opon 1.
§
This is the factory default seng for Vent Opon 2 to enable cooling fan behaviour.
Table 20 Valve types
Opon number Descripon of valve type
0
Normally open vent valve
*
1 Normally closed vent valve
*
This is the factory default seng for Valve 1 type and Valve 2 type.
When the pump is shipped, the controller is congured with the factory default Vent
opon 1 set to 0 and the Valve 1 type set to 0, as detailed in Table: Vent valve opons
and Table: Valve types. The controller can be congured to one of the other venng
opons provided commands can be sent via the serial interface, an Edwards TIC Turbo
and Instrument Controller, TIC Turbo Controller, or the Edwards nST2 PC soware can be
used via the USB serial port.
If the valve type is set to normally open, the controller only energises or shuts the TAV
solenoid valve when it receives a start command. Prior to that, the valve will be in the
‘open’ vent state. If the vacuum system is a large system, allow the backing pump to
reduce the pressure in the system to an acceptable level before starng the nEXT pump.
In this case, send a command via the serial interface to close the vent valve before
sending a start command – this is known as a delayed start.
If the valve type is set to normally closed and either vent opons 14 or 15 are used, the
controller will ensure that the TAV solenoid valve will only ‘open’ upon receipt of a stop
command. Therefore there is no need to send the delayed start command.
08/2021 - ©Edwards Limited
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aon

Edwards nEXT730D Specifications

General

Brand	Edwards
Model	nEXT730D
Category	Water Pump
Language	English