a.
Temperature recorder (boiler inlet exit).
b.
Steam flow and pressure recorder (pressure immediately after
second block valve, steam flow totalizer).
c.
Clock with minimum 200 mm 8 inch diameter face (one panel only).
d.
Steam gauge conforming to ASME B40.100 to indicate boiler shell or
drum pressure.
2.9.8.4
Identification
All field items shall be furnished with a permanent metal tag suitable for
tag number or service identification; back of panel items shall be included
in this category. Wires and cables shall be installed without joints or
splices except at terminal points. Wires shall be identified at both ends
by labels.
2.9.8.5
System Diagram
Laminated, color-coded system diagram mounted on the control panel
indicating all system components and location of all sensors and alarm
points shall be furnished.
2.9.9
Pilot Lights
Pilot lights shall be assembled in a factory-built cabinet, suitable for
flush mounting in cutouts in the control cabinet, complete with extruded
trim, clamps, and sheet metal rear housing, and finished in baked black
enamel. Components shall be integrated through appropriate
electro-mechanical devices with push-to-test indicating lights. Industrial
oil-tight construction shall be provided in the following colors for the
indication functions:
a.
Amber for power on the system.
b.
Green for boiler purge completion (one per boiler).
c.
White or manufacturer's standard color for energizing main fuel
valves.
d.
Red for alarms.
(1)
High temperature in combustion chamber.
(2)
High temperature at induced draft fan inlet.
(3)
System operation.
(4)
Emergency damper closed.
2.9.10
Clock
Clock shall be electric synchronous motor type. The clock shall be for
surface mounting and suitable for operation on 115-volt, 60-Hz single-phase
electric service. The clock shall have a shatterproof, crystal-covered
white dial, easy-to-read black Arabic numerals, black hour and minute
hands, red sweep second hand, and external manual reset knob at bottom of
case. The motor gear train shall be sealed in a permanent oil bath.
SECTION 15846A
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