2.6.2.4
Painting
Interior of fan, including wheel, shall be coated with protective coatings
suitable for flue gas conditions expected to be encountered by this fan.
Exterior surface of fan shall have coatings of quality weather and heat
resistant paint. Fan shall be shop assembled and match-marked by
manufacturer before dismantling for shipment. Surface cleaning and
painting shall be in accordance with manufacturer's standards for service
expected.
2.6.2.5
Electric Motor
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NOTE: The designer shall perform an economic
analysis and make a technical evaluation to
determine if the fan drive motor shall be provided
with variable speed control. Generally variable
speed drives for fans over 7 1/2 kW 10 hp will be
cost effective.
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Motor for driving induced draft fan shall be [variable speed] [two speed],
[_____] volt, three phase, 60 Hz, [open drip-proof,] [totally enclosed fan
cooled,] not less than [_____] kW hp, as specified in paragraph entitled
"Motors and Drives," and shall not overload over the range of the fan with
unheated air. Provide [_____] mm inch thick steel soleplate for motor.
Soleplate shall be common for all four motor mounting bolts. Separate
parallel soleplate bars are not acceptable.
2.6.2.6
Noise Level for Induced Draft Fan
Noise level shall not exceed 85 dBA sound pressure level at 1 1/2 meters 5
feet above floor and 1 1/2 meters 5 feet from the fan in any direction.
Provide sound attenuation to meet sound pressure level requirements.
2.7
COMPRESSED AIR SYSTEM
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NOTE: Refer to utilities schedule on definitive
drawings for suggested plant air requirements.
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2.7.1
Plant Compressed Air System
Provide two packaged units conforming to FS XX-C-2816, Type [_____], except
as modified below. Each compressor capacity shall be not less than [_____]
standard L/s scfm of air, at 20 degrees C 68 degrees F and [_____] kPa
(gage) psig (equivalent to pressure at an elevation of [_____] meters feet
), compressed to 1379 kPa (gage) 200 psig at the discharge. Compressor
speed shall not exceed [_____] rpm. Number of stages shall be [_____].
[Compressor shall have water cooled cylinders and heads.] [Oil free
delivery is required.] Provide a safety valve between each compressor
discharge and its shutoff valve. Provide a shutoff valve on the discharge
piping of each compressor. Provide an electric thermostatically controlled
immersion heater. Provide compressor with [[air] [water] cooled
intercooler and] aftercooler. [Compressor and motor shall be tank
mounted.] Provide lifting lugs and tie down attachments.
SECTION 15501N
Page 57
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