TM 5-810-15
(4) Annunciation. Alarm conditions of the ash
equipment as shown in table 9-4. Start/stop con-
trols on a control console will be performed utiliz-
handling system should be audible and visually
ing the ORT. Indication of motor operation should
annunciated in the control room. Annunciation may
be indicated on the CRT. Start/stop controls will be
be via CRT and printer or a panel mounted
indicating control switches or indicating push
annunciator of the same type described in c(5)
button when boiler and auxiliary panels are used for
above.
f. Air quality control system for stoker, pulver-
the operator interface.
(5) Annunciator. Annunciators will be pro-
ized coal and ACFB boilers.
(1) General requirements. Control of the air
vided on the boiler and auxiliaries panel for visual
and audible indication of alarm conditions. Annun-
quality control equipment will be from the control
ciator windows will have alarm legends etched on
room via CRT or control panel. The operator
the windows and will be backlighted in alarm or
interface will contain all devices required to control
test state. Each window will have at least two
and monitor the operation of the air quality control
parallel connected bulbs and front access for ease
system. This will include start/stop controls,
of bulb replacement. All annunciator circuits will be
selector controls, indication and annunciation.
(2) Start-stop controls. Start/stop controls will
solid state and compatible with microprocessor
based controls. The annunciator will have an
be provided for manual operation of baghouse
adjustable tone and volume horn. Split windows
cleaning via the CRT or panel mounted control
will be avoided unless conservation of panel space
switches.
(3) Selection controls. Selection controls will
is critical. The annunciator system will have one of
the alarm sequences specified in Instrument Society
be provided for selection of manual, pressure initi-
of America (ISA) S18.1. Test and acknowledge
ated, or time sequenced baghouse cleaning. Opera-
pushbuttons will be provided on the panel. All
tion of compartment isolation dampers and bag-
alarms, except for critical alarms, will be displaced
house bypass dampers will be provided. The
on the ORT and printed on the printer when CRT*s
control will be via CRT or panel mounted selector
are utilized as the operator interface.
switches.
d. Ash handling control for stoker, pulverized
(4) Indication. Indication will be provided for
coal and ACFB boilers.
compartment pressures and temperatures, bag-
(1) General requirements. Control of the fly
house inlet pressures and temperatures, and bag-
ash system will be from the control room via ORT
house outlet pressures and temperatures. The indi-
or control panel. A bottom ash panel will be
cation will be via CRT or panel mounted indicators.
(5) Annunciation. Alarm conditions of the air
located near the boilers. The control of the bottom
ash system may also be controlled from the control
quality control system should be audible and
room. The operator interface will contain all de-
visually annunciated in the control room. Annun-
vices required to properly control and monitor the
ciation may be via CRT and printer or a panel
mounted annunciator as described in c(5) above.
operation of the ash handling system. This will
g. Continuous emissions monitoring systems
include start/stop control, selector controls, indica-
controls. The continuous emissions monitoring
tion, and annunciator.
(2) Start/stop controls. Controls will include
system (CEMS) controls will be located in an air
start/stop controls for the vacuum producing equip-
conditioned and heated environment. The controls
ment, initiation of system operation, emergency
will be microprocessor based and include all
stop, selection of manual or automatic system
printers, displays and equipment necessary to save
operation and manual operation of hopper valves
all data and generate reports required by the EPA.
and vibrators. This control may be through a CRT
Malfunction of equipment will be annunciated in
or panel mounted indicating control switches or
the control room.
indicating pushbuttons, pushbuttons and selector
switches.
9-6. Field Instrumentation.
(3) Indicators. Indication of system vacuum,
primary and secondary bag filter pressures and
valves and piping instrumentation will be provided
temperature and vacuum pumps inlet temperature,
to sense the process variables and allow the control
valve position, bag filter operation, system
system to position the valves and dampers to
operation and hopper being emptied should be
control the process. All field devices shall be
displayed in the control room. The display may be
designed to operate in a dust laden atmosphere
via CRT or panel mounted indicators and indicating
with temperature conditions varying from 20 to
lights.
160 degrees F.
9-21
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