operating conditions. Coil shall be rated for continuous operation in
ambient temperatures up to 50C. Voltage shall be 120 volts AC, single
phase, 60 hertz. Provide design features as required that include 15 mm
1/2 inch threaded conduit hub, explosion-proof construction, metal-to-metal
seats, and manual operation.
2.12.15
Sulfur Dioxide Analyzers
Analyzers shall have a history of successful application in coal-fired
boiler flue gas analysis. Performance shall be unaffected by high moisture
content and high grain loading. Analyzers shall meet or exceed the
applicable requirements of U.S. EPA Regulation 40 CFR 60, Appendix B.
Provide control units, calibration gas, signal cable, mounting flanges,
accessories, and appurtenances required for integration of the analyzers
into the process control system.
2.12.16
Notify Contracting Officer, in writing, 45 days prior to factory tests.
Conduct standard tests required by the applicable codes and standards.The
Contracting Officer's representative may be present as an observer during
functional factory testing to assure correct operation of circuits. Perform
factory control systems tests with control system components and
prefabricated cables connected together, except transmitters and control
drive units. Provide an open loop test of each control system to check for
circuit continuity. Provide a completely closed loop simulation for each
analog control system to verify function and response, and to check
direction of response. Provide a completely closed loop simulation for
each digital control system to verify sequence operation, timing, and
software integrity. Test control boards as follows: Supply control boards
with 115-volt AC, 60 hertz, and operate each control switch and selector
switch in all positions to verify that control circuits operate ash shown
on the schematic diagrams. Simulate remote contacts and switches with
jumpers at the appropriate external terminal blocks to verify proper
circuit operation. Test annunciator systems to verify that annunciator
points operate correctly by jumpering or operating alarm initiating device
or jumpering external terminals for remote alarm inputs.
2.12.17
Nameplates
Provide plastic, engraved nameplates for remote mounted devices. Fabricate
nameplates from laminated white phenolic plastic with black engraved
letters. Size shall be 19 mm high and 80 mm long 3/4 inch high and 3
inches long. Attach nameplates with permanent adhesive or screws.
2.13
STRUCTURAL AND MISCELLANEOUS STEEL
Provide structural and miscellaneous steel required to frame and support
the spray dryer absorbers, fabric filter baghouses, ductwork, lime slurry
preparation system, and component parts and equipment. Provide steel
supports, access platforms, grating walkways and stairs for access to spray
dryer absorbers, fabric filter baghouses, and other equipment, as specified
in paragraph entitled "Access." Structural-steel supports shall be
designed to support equipment from the top of concrete foundations set at
elevation [_____] (150 mm (6 inches abovegrade). All concrete foundations,
anchor bolts and grouting will be provided by the Contractor. The
Contractor shall allow 50 mm 2 inches for grout, so that the bottom of the
baseplates provided under this contract shall be at elevation [_____].
Provide steel girts, purlins, braces and framing required for enclosures.
SECTION 15864N
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