D374-20-880 Issue E
Page 16
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Edwards and the Edwards logo are trademarks of Edwards Limited.
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4.6
Introduction to Gate Valve Operation
The gate valve operation of the iTIM may be configured (through the Single Equipment Monitor software) in one of
two ways:
z
Default configuration
z
Non-default configuration
Refer to the instruction manual supplied with the Single Equipment Monitor for details of how to select these
configurations.
4.6.1
Gate Valve Operation: Normal Operation
In the default configuration, the valve will operate as follows:
z
The gate valve will open after a specific delay after the dry pump is started; this delay is configurable.
z
The gate valve will close after a specific delay after the dry pump is switched off; this delay is configurable.
In the default configuration, you can also use the Process Tool or the Pump Display Module to open and close the gate
valve, however the valve will always open/close when the dry pump is started/switched off, as described above.
In the non-default configuration, use the Process Tool or the Pump Display Module to open and close the gate valve
as required.
4.6.2
Gate Valve Operation: Emergency Shutdown / Stop
In the default configuration, when the pumping system is automatically shutdown as a result of an alarm, or when
emergency stop is selected the iTIM will immediately close the gate valve.
In the non-default configuration, when the emergency stop is selected the iTIM will immediately close the gate valve.
WARNING
Before you select the gate valve open or closed, ensure that it is safe to do so.
