equipment, including wiring and motor efficiencies, shall be according to
Section 16402 INTERIOR DISTRIBUTION SYSTEM. Electrical characteristics and
enclosure type shall be as shown. Unless otherwise indicated, motors of
745 W 1 hp and above shall be high efficiency type. Motor starters shall
be provided complete with thermal overload protection and other
appurtenances necessary. Each motor shall be according to NEMA MG 1 and
shall be of sufficient size to drive the equipment at the specified
capacity without exceeding the nameplate rating of the motor. Manual or
automatic control and protective or signal devices required for the
operation specified, and any control wiring required for controls and
devices, but not shown, shall be provided. Where two-speed or
variable-speed motors are indicated, solid-state variable-speed controller
may be provided to accomplish the same function. Solid-state
variable-speed controllers shall be utilized for motors rated 7.45 kW 10 hp
or less. Adjustable frequency drives shall be used for larger motors.
2.11
AIR MOVING DEVICES
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NOTE: Drawings will indicate fan capacity, CFM
total static pressure, sound/power level,
arrangement, rotation, discharge and motor
horsepower. Details for weather hoods and flashing
and locations for bird screens and location of
remote manual switches will be indicated on the
drawings.
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2.11.1
General
Fans shall be tested and rated in accordance with the standards of AMCA 210,
Type "D" Ducted Inlet, Ducted Outlet Configuration. [Fans having a
capacity of less than 200 L/s 400 cubic feet per minute will be directly
connected to the motor shaft] [Where V-belt drives are used, such drives
shall be designed for not less than 150 percent of the connected driving
capacity, and motor sheaves shall be adjustable to provide not less than an
overall 20 percent speed variation. Sheaves shall be selected to drive the
fan at such speed as to produce the specified capacity when set at the
approximate midpoint of the sheave adjustment. Motors for V-belt drives
shall be provided with adjustable rails or bases]. Fans shall be provided
with personnel screens or guards on both suction and supply ends except
where ducts or dampers are connected to the fan. Fans and motors shall be
provided with vibration isolation supports or mountings. Vibration
isolation units shall be standard products with published load ratings, and
shall be single rubber-in-shear, neoprene coated fiberglass, double
rubber-in-shear springs, or springs under inertia base. Each fan shall be
selected to produce the capacity required at the fan total pressure
indicated. Standard AMCA arrangements shall be provided unless otherwise
indicated and the rotation and discharge shall be as indicated. Fans shall
have nonoverloading characteristics. Fan housing shall be constructed with
not less than 1.5 mm (16 gauge) 16 gauge thickness of steel. Fan impellers
shall be constructed to meet AMCA Spark Resistance "B" Classification and
accurately balanced both statically and dynamically when installed in the
assembled fan unit. Impeller and housing in the air stream shall be coated
with neoprene, epoxy, phenolic resins, or otherwise be suitable to resist
the corrosive gases and temperatures produced. Fans shall be free of
objectionable vibration or noise. Certified performance curves indicating
that the fan supplied will operate in its most efficient operating range
will be provided. In addition, "sound power" ratings shall be furnished
SECTION 15940A
Page 14
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