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INM MTL SUM5 Rev 7
DRAFT - 09 June 2021 DRAFT - 09 June 2021
30.20 ISA F3A-3 – First Out Reset Interlock
This sequence is the same as F3A with the addition of First Reset Interlock which
requires acknowledge to be pressed before First Reset will function.
30.21 ISA F3M – Manual Reset First Out
This sequence is the same as F3A with the addition of Manual Reset. All alarms must be
manually reset once the process has returned to normal.
30.22 ISA F3M-1-2 – Manual Reset First Out with Silence Interlock
This sequence is the same as F3A with the addition of Silence Interlock and Manual
Reset.
The Silence pushbutton must be operated before alarms can be acknowledged. The
Silence pushbutton stops the Audible alarm only.
All alarms must be manually reset once the process has returned to normal.
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