rated in accordance with ARI 460. Unless the condenser coil is completely
protected through inherent design, louvered panel coil guards shall be
provided by the manufacturer to prevent physical damage to the coil.
Manufacturer shall certify that the condenser and associated equipment are
designed for the submitted condensing temperature. For design conditions,
if matched combination catalog ratings matching remote condensers to
compressors are not available, the Contractor shall furnish a crossplotting
of the gross heat rejection of the condenser against the gross heat
rejection of the compressor, for the design conditions to show the
compatibility of the equipment furnished.
2.5.4.1
Condenser Casing
Condenser casing shall be aluminum not less than 2 mm 0.080 inch or hot-dip
galvanized steel not lighter than 1.2 mm (18 gauge) 18 gauge. Condensers
having horizontal air discharge shall be provided with discharge baffle to
direct air upward, constructed of the same material and thickness as the
casing.
2.5.4.2
Coil
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NOTE: Standard coil construction is copper tubes
with aluminum fins. For excessively corrosive
atmospheres, either copper tubes with copper fins or
aluminum tubes with aluminum fins should be
considered. For additional corrosion protection,
specify the manufacturer's standard epoxy or vinyl
coating.
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Condenser coil shall be of the extended-surface fin-and-tube type and shall
be constructed of seamless [copper] [or] [aluminum] tubes with compatible
[copper] [or] [aluminum] fins. Fins shall be soldered or mechanically
bonded to the tubes and installed in a metal casing. Coils shall be
circuited and sized for a minimum of 3 degrees C 5 degrees F subcooling and
full pumpdown capacity. Coil shall be factory leak and pressure tested
after assembly in accordance with ASHRAE 15. [Coil shall be entirely
coated with the manufacturer's standard epoxy or vinyl coating.]
2.5.4.3
Fans
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NOTE: When the density of the ambient air to be
handled by the fans differs substantially from the
density of the standard air value of 1.2 kg per
cubic m (0.075 pound per cubic foot) at 21 degrees C
(70 degrees F) and 101 kPa (29.92 inches mercury),
the density of the air and/or the elevation above
mean sea level will be stated.
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Fans shall be centrifugal or propeller type as best suited for the
application. Fans shall be direct or V-belt driven. Belt drives shall be
completely enclosed within the unit casing or equipped with a guard. When
belt drive is provided, an adjustable sheave to furnish not less than 20
percent fan-speed adjustment shall be provided. Sheaves shall be selected
to provide the capacity indicated at the approximate midpoint of the
adjustment. Fans shall be statically and dynamically balanced.
SECTION 15620A
Page 21
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