2.9
TERMINAL UNITS
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NOTE: Coordinate with paragraph Sound Attenuation
Equipment.
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2.9.1
Room Fan-Coil Units
Base units shall include galvanized coil casing, coil assembly drain pan
[valve and piping package,] [outside air damper,] [wall intake box,] air
filter, fans, motor, fan drive, and motor switch, plus an enclosure for
cabinet models and casing for concealed models. Leveling devices integral
with the unit shall be provided for vertical type units. Sound power
levels shall be as indicated. Obtain sound power level data or values for
these units according to test procedures based on ARI 350. Sound power
values apply to units provided with factory fabricated cabinet enclosures
and standard grilles. Values obtained for the standard cabinet models will
be acceptable for concealed models without separate test provided there is
no variation between models as to the coil configuration, blowers, motor
speeds, or relative arrangement of parts. Provide automatic valves and
controls as specified in paragraph CONTROLS. Fasten each unit securely to
the building structure. Capacity of the units shall be as indicated. Room
fan-coil units shall be certified as complying with ARI 440, and shall meet
the requirements of UL 1995.
2.9.1.1
Enclosures
Fabricate enclosures from not lighter than 1.3 mm 18 gauge steel,
reinforced and braced. Front panels of enclosures shall be removable and
provided with 7 mm 1/4 inch closed cell insulation or 13 mm 1/2 inch thick
dual density foil faced fibrous glass insulation. The exposed side shall
be high density, erosion-proof material suitable for use in air streams
with velocities up to 23 m/s4,500 fpm. Discharge grille shall be
[adjustable] [fixed] and shall be of such design as to properly distribute
air throughout the conditioned space. Plastic discharge and return grilles
are acceptable provided the plastic material is certified by the
manufacturer to be classified as flame resistant according to UL 94 and the
material shall comply with the heat deflection criteria specified in UL 1995.
Ferrous metal surfaces shall be galvanized or factory finished with
corrosion resistant enamel. Provide access doors or removable panels for
piping and control compartments. Provide duct discharge collar for
concealed models. Enclosures shall have easy access for filter replacement.
2.9.1.2
Fans
Fans shall be galvanized steel or aluminum, multiblade, centrifugal type.
In lieu of metal, fans and scrolls may be non-metallic materials of
suitably reinforced compounds. Fans shall be dynamically and statically
balanced. Surfaces shall be smooth. Assemblies shall be accessible for
maintenance. Disassembly and re-assembly shall be by means of mechanical
fastening devices and not by epoxies or cements.
2.9.1.3
Coils
Fabricate coils from not less than 10 mm 3/8 inch outside diameter seamless
copper tubing, with copper or aluminum fins mechanically bonded or soldered
to the tubes. Provide coils with not less than 13 mm 1/2 inch outside
diameter flare or sweat connectors, accessory piping package with thermal
SECTION 15895
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