provided and installed as a complete system to automatically activate the
appropriate signals and initiate appropriate safety actions. The safety
system shall be provided with a self-test method to verify its operability.
Alarm signals shall have manual acknowledgment and reset devices. The
alarm signal systems shall reactivate for new signals after acknowledgment
is given to any signal. The systems shall be dealt with as an alarm on
that system element. The remote annunciator panels and alarm panel shall
be as specified in paragraph PANELS.
2.12.1
Audible Signal
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NOTE: High dB levels are required for audible
alarms located near an engine. Audible signaling
devices with sound levels in excess of 100 dB should
be specified for engine room application, and the
alarm location should be shown on the plans.
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The audible alarm signal shall sound at a frequency of [70] [_____] Hz at a
volume of [75] [_____] dB at 3.1 m 10 ft. The sound shall be continuously
activated upon alarm and silenced upon acknowledgment. Signal locations
shall be as shown on the plans.
2.12.2
Visual Signal
The visual signal shall be a panel light. The light shall normally be off
but activated to blinking upon alarm. The light shall change to
continuously lit upon acknowledgment. If automatic shutdown occurs, the
display shall remain in an activated status to indicate the cause of
failure and shall not be reset until the cause of alarm has been cleared
and/or restored to the normal condition. Shutdown alarms shall be amber.
2.12.3
Alarms and Action Logic
2.12.3.1
Shutdown
Shutdown signals shall simultaneously activate the audible signal, activate
the visual signal, and stop the engine.
2.12.3.2
Problem
Problem signals shall activate the visual signal.
2.12.4
Alarm Panel
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NOTE: Select the first subparagraph "b" and first
subparagraph "j" below if diesel engines are
specified; select the second subparagraph "b" and
second subparagraph "j" if natural gas fueled
engines are specified.
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The panel shall be fabricated and located as specified in paragraph PANELS,
and shall contain the following functions:
FUNCTION OR INDICATION/CONTROL ACTION (AUXILIARY ACTION)
SECTION 15133A
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