substitution request - Alliance Construction Solutions

2.02 AIR TERMINALS:
Project No.: 10145
550 15 th Street Dual Brand Hotel
03/16/2012
c. Carrier
d. Environmental Technologies
e. Krueger
f. Metal-Aire
g. Titus
h. Trane
A. General: Provide factory-fabricated and tested air terminals as indicated, selected with
performance characteristics which match or exceed those indicated on schedule.
B. Air terminal units shall be of low pressure drop design, single-duct throttling-type,
pressure-independent, and suitable for use in medium pressure variable volume air
distribution systems.
C. Casing shall be of minimum 22-gauge galvanized steel construction, with internal
acoustical, coated, ½” thick, 1-½ lb./cu. ft. density fiberglass insulation and inlet and
outlet duct connections. Gasketed and insulated quick-opening access doors shall be
provided for air terminals with internally mounted serviceable components, including
actuators and fan motors. Access doors shall allow for removal of fan and/or servicing of
unit without disturbing ductwork and piping connections.
D. Internal air volume damper blade shall be of extruded aluminum or 18-gauge steel with
keyed fit shaft and nylon bushing. Damper shall be constructed to prevent air leakage in
excess of 2% of rated air quantity at 4.0” w.g. inlet static pressure. All mechanical parts
shall be galvanized or non-ferrous.
E. Hot water heating coils shall be designed for 200 psig maximum working pressure and
200°F maximum operating temperature. Coils shall be serpentine-type, constructed of ½”
O.D. copper tubes mechanically bonded to aluminum fins, with galvanized steel casting.
F. Electric heating coils shall be constructed of electric resistance heating elements in a
galvanized steel casing with integral control panel housed in a NEMA 1 enclosure, with
hinged access door and factory wiring. Coils shall include primary automatic reset
thermal cutout, secondary manual reset thermal cutout, line fuses, differential pressure air
flow switch, door interlocking disconnect, magnetic contactors, terminal blocks for power
and control connections, and UL listing as a duct heater. Provide a minimum of two
stages for heaters 3 KW and above, except as otherwise indicated on drawings or
schedules.
G. All terminal units with electrical components shall be provided with a single-point electrical
connection for the entire unit. All electrical components shall be UL listed and installed in
accordance with the National Electrical Code.
1. All line voltage electrical components shall be mounted in a NEMA 1 enclosure.
2. The entire assembly shall be UL or ETL listed.
3. Class II, 24V (AC), 40 VA transformer shall be provided for control power.
H. Each terminal unit shall be provided with labeling showing plan designation, unit location,
unit size, cfm range and settings, damper fail position, thermostat action, and calibration
chart.
23 3600 - 3 AIR TERMINAL UNITS