type, enclosure type, and maximum rpm should be
shown on the drawings in the equipment schedules.
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Electrical motor-driven equipment specified shall be provided complete with
motor, motor starter, and controls. Unless otherwise specified, electric
equipment, including wiring and motor efficiencies, shall be in accordance
with Section 16402 INTERIOR DISTRIBUTION SYSTEM. Electrical
characteristics and enclosure type shall be as shown. Unless otherwise
indicated, motors of 746 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 in accordance with
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.
PART 2
PRODUCTS
2.1
SELF-CONTAINED FURNACE
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NOTE: Indicate on the drawings the unit's thermal
output required, the nominal air temperature rise
required, the calculated air flow rate, the unit's
pressure requirements, the unit's air discharge
(i.e. upflow, downflow, or horizontal), etc. These
units generally range in size from 11.7 kW (40
MBtuh) up to 35.1 kW (120 MBtuh).
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Furnace shall be a manufacturer's standard, self-contained, forced
circulated air heating type furnace as indicated. Furnace and furnace
components shall be completely factory-assembled and wired. Furnace casing
shall be factory insulated and be compatible with the operating
temperatures. Furnace shall be provided with removable service panels
which allow access to all internal components requiring cleaning,
servicing, or adjustment.
2.1.1
Gas-Fired Unit
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NOTE: High efficiency type units will be specified
unless the conventional type units are calculated to
be more life cycle cost effective.
For conventional type furnace with a capacity less
than 65.9 kW (225 MBtuh) require a minimum AFUE of
78 percent. For conventional type furnace with a
capacity greater than 65.9 kW (225 MBtuh) require a
minimum AFUE of 80 percent. For high efficiency
type furnace require a minimum AFUE of 90 percent.
The first cost of a high efficiency, condensing type
SECTION 15566A
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