substitution request - Alliance Construction Solutions

2.03 FAN-POWERED TERMINALS:
A. In addition to the above requirements for Air Terminals (Part 2.02), comply with the
following:
B. Fan section shall include a galvanized steel plenum, acoustically lined, housing a
dynamically balanced fan with forward-curved blades, direct-driven from a permanent
split-capacitor motor with SCR variable speed control, integral thermal overload
protection, permanently-lubricated bearings, and fan contactor factory-wired to power and
control terminal blocks in a sheet metal enclosure. Motor shall be specifically designed for
use with an SCR for fan speed adjustment and shall include an anti-backward rotation
device. Motor and fan shall be internally vibration-isolated from unit casing.
1. For parallel variable air volume terminals, the fan shall be mounted in a separate
compartment. The fan shall operate intermittently, drawing only plenum air. Unit
shall include backdraft damper to prevent primary air from bypassing to the
plenum. Damper shall be constructed of aluminum blades, gasketed to prevent
leakage.
2. For series constant volume terminals, the fan shall be mounted in a common
compartment with the primary air damper. The fan shall operate continuously,
drawing a mixture of plenum air and primary air.
C. Fan controls shall be incorporated in a factory-assembled control panel and shall include
pre-wired manual disconnect switch, a contractor, and a manually adjustable speed
control for the fan, installed and wired by the terminal unit manufacturer.
D. Units shall include filter rack and 1” thick throwaway filter, with side or rear access, on
secondary air inlet. Provide two complete sets of filters.
2.04 CONTROLS:
A. Air terminal unit manufacturer shall mount DDC controller and actuator provided by
temperature controls manufacturer. See Section 230900.
PART 3 – EXECUTION
3.01 INSPECTION:
A. Examine areas and conditions under which air terminals are to be installed. Do not
proceed with work until unsatisfactory conditions have been corrected.
3.02 COORDINATION:
A. The Contractor is responsible for determining the position of controls, actuators, and
access. Coordinate each air terminal’s position with building elements, piping, conduit,
ductwork and other items. Order left/right hand units as required, and inform all other
trades as required. Relocate interfering items or terminal as required to provide proper
access, if not coordinated beforehand.
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
23 3600 - 4 AIR TERMINAL UNITS