2.4.1
Instrumentation
[Instrumentation, such as the steam flow recorder, steam flow totalizer,
air flow recorder, [carbon dioxide] [oxygen] recorder, and flue gas
temperature recorder may be combined into one or more meters having
multiple pens plus integrating capabilities as required for specified
totalization functions.] [Instrumentation for recording and integrating
steam flow, for recording percent of CO2 or O2 in the flue gas, and for
recording flue gas temperature shall be combined in a single boiler
operation meter having three pens using different colored ink.]
2.4.2
Control Panel
The boiler control panel shall include the following switches, controls,
and accessories:
a.
Boiler on-off pushbutton station with indicating lights.
b.
Draft fan manual, start-stop, pushbutton station with indicating
lights for on, off, and tripped.
c.
Controllers for the combustion control system.
d.
Manual-automatic stations for individual controllers of the
combustion control system.
e.
[Indicating lights and alarm with silencer switch to signal
nonrecycling safety shutdowns as specified herein [and excess
smoke density conditions].] [Annunciator.]
f.
Manual switch to transfer combustion burner and controls from oil
to gas and vice versa.
g.
Switch and indicating lights to control emergency gas shut-off
valve.
h.
[Electric clock, 300 mm 12 inch dial, with second sweep hand and
seal-in driving unit] [Digital clock that indicates hour, minutes,
and seconds, with numerals suitable for reading by persons with
normal vision from a distance of 6 meters 20 feet].
2.4.3
Control Systems
The flame safeguard and programming control systems shall be mounted in the
central control panel or an auxiliary control panel located adjacent to the
main panel adjacent to the boiler. Auxiliary panels, if provided, shall be
fabricated as specified herein for the main control panel.
2.5
Boiler Plant Controls and Instruments
Provide the following plant [controls and] instruments:
a.
Instruments to indicate and record feedwater temperature and steam
pressure in the deaerator.
b.
Pressure gages to indicate steam pressure in main header,
conforming to ASME B40.1 [gas pressure in main supply line] [oil
pressure] [atomizing steam pressure].
SECTION 15517N
Page 17
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