2.9.11
Alarm Annunciator Panel
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NOTE: Edit to indicate the number of points desired
and specific items in the list.
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An annunciator system shall be mounted on each control panel. Visual
signals shall be backlighted nameplates for each point. A common audible
alarm signal and a common acknowledge push button shall be provided for
each control panel. A common alarm-silencing relay shall be included in
the alarm circuit which will permit the boiler operator to silence the
audible horn while retaining visual indication until the malfunction or
abnormal condition has been cleared. Nameplate size of alarm modules shall
be nominal 70 mm 2-3/4 inches high by 75 mm 3 inches wide in translucent
white acrylic plexiglass and all nomenclature shall be engraved on front
surface in black lettering. Flasher module shall be mounted and prewired
with silence and test pushbuttons. Alarm points and window engraving shall
be as shown below.
ALARM POINT
WINDOW ENGRAVING
LSL-[_____]
High condensate tank level
LSL-[_____]
Level low, condensate storage tank
LSL-[_____]
Pump cut-out, condensate storage tank
PSL-[_____]
Pressure-low condensate
PSL-[_____]
Pressure-low feedwater
PSH-[_____]
Pressure-high steam drum
LSH-[_____]
Level-high steam drum
LSL-[_____]
Low water level with cutoff
LSL-[_____]
Second low water level cutoff
LSH-[_____]
Level-high deaerator
LSL-[_____]
Level-low, deaerator
PSL-[_____]
Induced draft fan failure
PSL-[_____]
Boiler tube cleaning failure
2.9.12
Steam Flowmeters
Steam flowmeters shall be provided to measure the steam flow from each
boiler and each main steam header outlet. Flow meters shall also be
provided to measure feedwater flow to each boiler. Nozzles and orifice
plates shall be flange-mounting type and made of stainless steel. Orifice
plates shall be of the square edge, concentric, paddle type designed for
flange taps. Condensate pots shall be provided for steam service. Meters
shall be designed to accurately measure saturated steam at a gauge pressure
of [_____] kPa psi. Meters shall be direct connected and of the
SECTION 15846A
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