UFC 3 -430-11
14 February 2001
CHAPTER 6
RECOMMENDED BOILER INSTRUMENTATION
6-1
BOILER CONTROL PANEL INDICATORS, RECORDERS AND
TOTALIZERS. The instrumentation in Table 6 -1 represents the minimum
recommended requirements for a boiler plant. This instrumentation selection is based
primarily on boiler operation safety concerns. Refer to NFPA 8502, Standard for the
instrumentation concerns for boiler plants in the 13.18 gigajoule/h (12,500,000 Btu/h) or
above range and ASME CSD-1, Controls and Safety Devices for Automatically Fired
Boilers for boiler plants below 13.18 gigajoule/h (12,500,000 Btu/h). The indicators and
recorders can be either dedicated or shared devices. Totalizers must be dedicated
devices. Shared device selection may be either by means of pushbuttons, a selector
switch, or by entering commands on a keyboard. Provide the following in the display of
information associated with a shared device.
Name of process variable
Instrument number
Units
Process variable value
Store the process data in a storage device such as a computer disk or tape if
a dedicated recorder or totalizer is not provided. Label the computer disk or tape as to
process variable, instrument number, date, time, and units. The time label must include
hours, minutes, and seconds. Store the data so that it can be retrieved selectively. In
selective retrieval as a minimum include the name of process variable, instrument
number, date and desired time interval. Include maximum and minimum points and
alarms with the data to be recorded. Provide a dedicated printer or printer/plotter on
which the recorded and totalized data can be presented on paper on demand. Data
storage, retrieval, and printing must meet federal, state, and local environmental
documentation requirements.
An instrumentation item is not applicable if the equipment that it services is
not included in the plant. For example, if an air preheater is not provided then an air
preheater out let temperature indicator does not have to be furnished.
6-2
BOILER CONTROL PANEL ALARMS AND SHUTDOWNS. The alarms and
shutdowns in Table 6 -2 represents the minimum recommended requirements for a
boiler plant. These were selected based primarily on boiler operation safety concerns.
Refer to NFPA 8502, Standard for the Prevention of Furnace Explosions/Implosions in
(12,500,000 Btu/h) or above range and ASME CSD-1, Controls and Safety Devices for
Provide a separate window in an annunciator system for each dedicated alarm. Provide
a dedicated common trouble alarm window to which the non-dedicated alarms are
wired. Include a first-out listing to show which device connected to the common trouble
6-1
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