Panel Piping and Wiring

As a minimum, the following parameters shall be displayed on the panel:

Pressure

Indicator

Recorder Point

Main steam header

X

Boiler drum

X

Feedwater

X

Instrument air

X

Draft

Indicator

Recorder Point

Windbox

X

Furnace

X

Boiler gas outlet

X

ID fan inlet

X

Temperature

Indicator

Recorder Point

Main steam

X

Boiler gas outlet

X

Windbox

X

Feedwater

X

Level

Indicator

Recorder Point

Boiler drum

X

Bunker or silo

X

Flow

Indicator

Recorder Point

Main steam (including

totalizer)

X

Feedwater

X

Air

X

Fuel

X

Analyzers

Indicator

Recorder Point

Flue gas opacity

X

Flue gas oxygen

X

2.8.5

Panel Piping and Wiring

High-pressure and high temperature values shall be pneumatically or

electrically transmitter, or both, to the panel. Pneumatic signals shall

be 21 to 103 kPa 3 to 15 psig. Piping connectors to indicators shall be 6

mm 1/4 inch OD copper tubing conforming to ASTM B 68M ASTM B 68. Flow

signals shall be transmitted either pneumatically or electrically to the

panel-mounted receiver. Copper tubing connections and electric wiring

shall be run to a terminal block located on the inside of the panel front

near the bottom. Wiring shall be terminated at an identified terminal

strip. Wiring shall be suitable for boiler room requirements and installed

according to NFPA 70.

2.8.6

Pilot Lights

Pilot lights shall be assembled in a factory-built cabinet, suitable for

flush mounting in cutouts in boiler control panel, complete with extruded

trim, clamps, and sheet metal rear housing, and finished in baked black

SECTION 15559A

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