5.10 Manual shut-down
WARNING
If you intend to do maintenance on the iH system after you have shut it down
and you will not isolate the iH system from the electrical supply, do not
disconnect the Pump Display Terminal or release control from the Pump
Display Terminal (see Section 5.5). If you do, the iH system could be started
by another Module.
Notes: Press the Cancel button on the Pump Display Terminal to cancel a shut-down request. The purge
time for the Auto shut-down option is preset to 15 minutes as supplied. This purge time can be
configured for your application.
Ensure that it is safe to shut down the iH system before you select shut-down.
Use the Switch Off menu to shut down the iH system. Note that the menu has two
shut-down options: Fast and Auto. We recommend that you use the Auto shut-down option.
This ensures that the iH system is purged with nitrogen for 15 minutes before it is shut down.
When you select Auto shut-down, the following actions will occur (with a small time delay
between each action):
•
On an iH600 or iH1000 system, the HCMB pump is switched off.
•
The LED on the On button on the Pump Display Terminal (Figure 1-8, item 1) starts to flash.
•
If not already open, the gas solenoid-valves are opened to switch on the nitrogen purges to the
iH system.
•
After 15 minutes, the gas solenoid-valves are closed to switch off the nitrogen purges to the
HCDP pump, and at the same time the HCDP pump is switched off.
•
The LED on the On button on the Pump Display Terminal goes off.
iH Dry Pumping Systems 5-9
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