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UFC 3 -430-11

14 February 2001

CHAPTER 6 RECOMMENDED BOILER INSTRUMENTATION

Paragraph

6-1

BOILER CONTROL PANEL INDICATORS,

RECORDERS, AND TOTALIZERS ............................................ 6-1

6-2

BOILER CONTROL PANEL ALARMS AND SHUTDOWNS .. 6-1

6-3

BOILER CONTROL PANEL CONTROLLERS ......................... 6-2

6-4

VALUE ENGINEERING ............................................................... 6-2

CHAPTER 7 CONTROL LOOPS

Paragraph

7-1

GENERAL ...................................................................................... 7-1

7-2

CONTROL LOOP TYPES............................................................ 7-1

7-2.1

Pressure.......................................................................................... 7-1

7-2.2

Temperature ................................................................................... 7-1

7-2.3

Level ................................................................................................ 7-1

7-2.4

Flow ................................................................................................. 7-1

7-3

AIR TO FUEL RATIO.................................................................... 7-1

7-3.1

Control Configuration .................................................................... 7-2

7-3.2

Fuel Changeover ........................................................................... 7-2

7-3.3

Simultaneous Fuel Firing ............................................................. 7-2

7-3.4

Alarms ............................................................................................. 7-2

7-4

BOILER DRUM LEVEL ................................................................ 7-2

7-4.1

Single Element Control................................................................. 7-2

7-4.2

Two Element Control .................................................................... 7-2

7-4.3

Three Element Control ................................................................. 7-2

7-5

MULTIPLE BOILERS .................................................................... 7-3

APPENDIX A

REFERENCES............................................................. A -1

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