Edwards nEXT 55, Инструкция по эксплуатации

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Option num-
ber
Description of vent function
5 In a fail condition, vent valve fully opens. If a stop command is re-
ceived, controlled venting from 100% to 50% full rotational speed and
then vent valve opens fully below 50%.
6 Vent valve fully opens for a stop command or a fail condition.
7 Same as option 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 rotational speed for a stop com-
mand.
15 Controlled venting from 100% to 50% full rotational speed and then
vent valve opens fully below 50% for a stop command.
*
This is the factory default setting for Vent Option 1.
§
This is the factory default setting for Vent Option 2 to enable cooling fan behaviour.
Table 28
Valve types
Option number Description of valve type
0
Normally open vent valve
*
1 Normally closed vent valve
*
This is the factory default setting for Valve 1 type and Valve 2 type.
When the pump is shipped, the controller is configured with the factory default Vent
option 1 set to 0 and the Valve 1 type set to 0, as given in Table: Vent valve options and
Table: Valve types . The controller can be configured to one of the other venting options
provided commands can be sent through the serial interface or a manufacturer's TIC
Turbo and Instrument Controller or TIC Turbo Controller or the manufacturer's nST PC
software can be used through 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. Before that, the valve will be in the
‘open’ vent state. If the vacuum system is large, allow the backing pump to decrease the
pressure in the system to a permitted level before you start the pump. Send a command
through 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 vent options 14 or 15 are used, the
controller will ensure that the TAV solenoid valve will only ever ‘open’ upon receipt of a
stop command. There is no need to send the delayed start command.
If the pump is controlled with a manufacturer's TIC Turbo and Instrument Controller or
TIC Turbo Controller, the TAV solenoid valve can be operated from the TIC. Refer to the
TIC Instruction Manuals for more information.
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B8G000880_E - Operation