UFC 3 -430-11
14 February 2001
alarm tripped first. Provide instrumentation to show which device shut the equipment
down first during a system shutdown.
An alarm or shutdown is not applicable if the equipment that it services is not
included in the plant. For example, if the boiler is gas fired only, a low fuel oil pressure
alarm is not required. Refer also to paragraphs 3 -5 and 4 -2.6.
6-3
BOILER CONTROL PANEL CONTROLLERS. Provide controllers as
required for the proper operation of the boiler plant. Controllers required for a typical
boiler plant include steam header pressure (plant master and boiler master), boiler drum
water level (feedwater flow), fuel flow, combustion air flow and boiler furnace draft.
6-4
VALUE ENGINEERING. There are many cost tradeoffs associated with the
design of a boiler. The use of an oxygen trim system is one example. The installation
of an oxygen trim system in a boiler design will provide fuel savings. The analyzer that
provides this function, however, is costly to buy and maintain. Therefore, oxygen trim
systems should only be used on large boilers where the cost of fuel savings outweighs
the cost of the analyzer.
6-2
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