Horizontal sections of exhaust piping shall be sloped downward away from
the engine to a drip leg for collection of condensate with drain valve and
cap. Changes in direction shall be long radius. Exhaust piping, mufflers
and silencers installed inside any building shall be insulated in
accordance with paragraph THERMAL INSULATION and covered to protect
personnel. Vertical exhaust piping shall be provided with a hinged,
gravity-operated, self-closing, rain cover.
2.9
PYROMETER
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NOTE: For sets smaller than 200 kW delete this
paragraph. Pyrometers with individual thermocouples
are not normally available and should not be
specified for units smaller than 1000 kW.
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A pyrometer, [multi-point selector switch, and individual thermocouples]
[and thermocouple] with calibrated leads shall be provided to show the
temperature [in each engine cylinder and the combined exhaust] [of the
combined exhaust]. For a supercharged engine, additional points,
thermocouples and leads shall be provided to show the temperature in the
turbocharger exhaust gas outlet and combustion air discharge passages.
Graduated scale length shall be not less than 150 mm 6 inches. The
selector switch shall be double pole, with an "off" position, one set of
points for each thermocouple, and suitable indicating dial. The pyrometer,
thermocouples, leads and compensating devices shall be calibrated to show
true exhaust temperature within plus or minus 1% above the highest
temperature encountered at 110% load conditions.
2.10
EMISSIONS
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NOTE: The designer will coordinate emissions
requirements with the installation (base/post)
environmental office and provide a listing of the
requirements. The identification of environmental
requirements should be identified at the beginning
of the project as a special study effort which
requires funding separate from the normal design.
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The finished installation shall comply with Federal, state, and local
regulations and restrictions regarding the limits of emissions, as listed
here: [_____].
2.11
STARTING SYSTEM
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NOTE: Either electrical or pneumatic starting
system should be used and the other paragraphs
deleted. Electrical starting will be used for most
applications. Engines up to 750 kW should be
equipped for electric starting. See manufacturers
literature to determine availability for sizes above
750 kW. For units used in emergency applications,
select the first option and delete all other
starting system paragraphs.
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SECTION 16263A
Page 48
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