test. A 125 hour test will be specified in a
noncorrosive environment and a 500 hour test will be
specified in a corrosive environment.
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Unless otherwise specified, equipment and component items, when fabricated
from ferrous metal, shall be factory finished with the manufacturer's
standard finish, except that items located outside of buildings shall have
weather resistant finishes that will withstand [125] [500] hours exposure
to the salt spray test specified in ASTM B 117 using a 5 percent sodium
chloride solution. Immediately after completion of the test, the specimen
shall show no signs of blistering, wrinkling, cracking, or loss of adhesion
and no sign of rust creepage beyond 3 mm 1/8 inch on either side of the
scratch mark. Cut edges of galvanized surfaces where hot-dip galvanized
sheet steel is used shall be coated with a zinc-rich coating conforming to
ASTM D 520, Type I.
2.12.2
Factory Applied Insulation
Refrigeration equipment shall be provided with factory installed insulation
on surfaces subject to sweating including the suction line piping. Where
motors are the gas-cooled type, factory installed insulation shall be
provided on the cold-gas inlet connection to the motor per manufacturer's
standard practice. Factory insulated items installed outdoors are not
required to be fire-rated. As a minimum, factory insulated items installed
indoors shall have a flame spread index no higher than 75 and a smoke
developed index no higher than 150. Factory insulated items (no jacket)
installed indoors and which are located in air plenums, in ceiling spaces,
and in attic spaces shall have a flame spread index no higher than 25 and a
smoke developed index no higher than 50. Flame spread and smoke developed
indexes shall be determined by ASTM E 84. Insulation shall be tested in
the same density and installed thickness as the material to be used in the
actual construction. Material supplied by a manufacturer with a jacket
shall be tested as a composite material. Jackets, facings, and adhesives
shall have a flame spread index no higher than 25 and a smoke developed
index no higher than 50 when tested in accordance with ASTM E 84.
2.13
SUPPLEMENTAL COMPONENTS/SERVICES
2.13.1
Condenser Water Piping and Accessories
Condenser water piping and accessories shall be provided and installed in
accordance with Section 15181 CHILLED, CHILLED-HOT, AND CONDENSER WATER
PIPING SYSTEMS.
2.13.2
Refrigerant Piping
Refrigerant piping for split-system unitary equipment shall be provided and
installed in accordance with Section 15182 REFRIGERANT PIPING.
2.13.3
Cooling Tower
Cooling towers shall be provided and installed in accordance with Section
15645A COOLING TOWER.
2.13.4
Ductwork
Ductwork shall be provided and installed in accordance with Section 15895
AIR SUPPLY, DISTRIBUTION, VENTILATION, AND EXHAUST SYSTEM.
SECTION 15700A
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